<SEC-DOCUMENT>0001628280-22-028551.txt : 20221107
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<ACCEPTANCE-DATETIME>20221107084815
ACCESSION NUMBER:		0001628280-22-028551
CONFORMED SUBMISSION TYPE:	10-Q
PUBLIC DOCUMENT COUNT:		68
CONFORMED PERIOD OF REPORT:	20220930
FILED AS OF DATE:		20221107
DATE AS OF CHANGE:		20221107

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Mersana Therapeutics, Inc.
		CENTRAL INDEX KEY:			0001442836
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		10-Q
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38129
		FILM NUMBER:		221363890

	BUSINESS ADDRESS:	
		STREET 1:		840 MEMORIAL DRIVE
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
		BUSINESS PHONE:		617-498-0020

	MAIL ADDRESS:	
		STREET 1:		840 MEMORIAL DRIVE
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MERSANA THERAPEUTICS INC
		DATE OF NAME CHANGE:	20080813
</SEC-HEADER>
<DOCUMENT>
<TYPE>10-Q
<SEQUENCE>1
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<DESCRIPTION>10-Q
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id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xL2ZyYWc6NjMzOWRhZGU1N2VkNDk2MDg1Zjk4NGZkYmU5MzkxZGUvdGV4dHJlZ2lvbjo2MzM5ZGFkZTU3ZWQ0OTYwODVmOTg0ZmRiZTkzOTFkZV8yMjI5_5ec5b49e-778c-42a8-af02-881598baae19">617</ix:nonNumeric>) <ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="dei:LocalPhoneNumber" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xL2ZyYWc6NjMzOWRhZGU1N2VkNDk2MDg1Zjk4NGZkYmU5MzkxZGUvdGV4dHJlZ2lvbjo2MzM5ZGFkZTU3ZWQ0OTYwODVmOTg0ZmRiZTkzOTFkZV8yMjI4_cf36d158-cdf8-48b8-a51a-0e0c35680083">498-0020</ix:nonNumeric></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">(Registrant&#8217;s telephone number, including area code)<br/></span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:26.041%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:3pt"><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td></tr></table></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Securities registered pursuant to Section 12(b) of the Act:</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.869%"><tr><td style="width:1.0%"></td><td style="width:32.928%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:21.455%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:42.317%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="border-left:1pt solid #000;border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Title of each class</span></td><td colspan="3" style="border-left:1pt solid #000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Trading symbol(s)</span></td><td colspan="3" style="border-left:1pt solid #000000;border-right:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Name of each exchange on which registered</span></td></tr><tr><td colspan="3" style="border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="dei:Security12bTitle" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xL2ZyYWc6NjMzOWRhZGU1N2VkNDk2MDg1Zjk4NGZkYmU5MzkxZGUvdGFibGU6MDVlODczODQwODQxNGZhM2I4OGVkNzFlMzE0NTdkN2EvdGFibGVyYW5nZTowNWU4NzM4NDA4NDE0ZmEzYjg4ZWQ3MWUzMTQ1N2Q3YV8xLTAtMS0xLTQ3OTAx_4bedfe9b-17a8-4282-851e-1a4b9a69c8fd">Common Stock, $0.0001 par value</ix:nonNumeric></span></td><td colspan="3" style="border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="dei:TradingSymbol" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xL2ZyYWc6NjMzOWRhZGU1N2VkNDk2MDg1Zjk4NGZkYmU5MzkxZGUvdGFibGU6MDVlODczODQwODQxNGZhM2I4OGVkNzFlMzE0NTdkN2EvdGFibGVyYW5nZTowNWU4NzM4NDA4NDE0ZmEzYjg4ZWQ3MWUzMTQ1N2Q3YV8xLTEtMS0xLTQ3OTAx_09375ffa-ee93-4096-ab60-403801b06c82">MRSN</ix:nonNumeric></span></td><td colspan="3" style="border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="dei:SecurityExchangeName" format="ixt-sec:exchnameen" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xL2ZyYWc6NjMzOWRhZGU1N2VkNDk2MDg1Zjk4NGZkYmU5MzkxZGUvdGFibGU6MDVlODczODQwODQxNGZhM2I4OGVkNzFlMzE0NTdkN2EvdGFibGVyYW5nZTowNWU4NzM4NDA4NDE0ZmEzYjg4ZWQ3MWUzMTQ1N2Q3YV8xLTItMS0xLTQ3OTAx_7241c098-48eb-4753-b5e3-2a9f0ee05510">The Nasdaq Global Select Market</ix:nonNumeric></span></td></tr></table></div><div style="margin-bottom:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Indicate by check mark whether the registrant (1)&#160;has filed all reports required to be filed by Section&#160;13 or 15 (d)&#160;of the Securities Exchange Act of 1934 during the preceding 12&#160;months (or for such shorter period that the registrant was required to file such reports), and (2)&#160;has been subject to such filing requirements for the past 90&#160;days. <ix:nonNumeric 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by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule&#160;405 of Regulation S-T (&#167;232.405 of this chapter) during the preceding 12&#160;months (or for such shorter period that the registrant was required to submit such files). <ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="dei:EntityInteractiveDataCurrent" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xL2ZyYWc6NjMzOWRhZGU1N2VkNDk2MDg1Zjk4NGZkYmU5MzkxZGUvdGV4dHJlZ2lvbjo2MzM5ZGFkZTU3ZWQ0OTYwODVmOTg0ZmRiZTkzOTFkZV8yMjM4_4b8b302b-7b34-41f4-a7ee-8f9980759aa2">Yes</ix:nonNumeric>&#160;&#160;</span><span style="color:#000000;font-family:'Arial Unicode MS',sans-serif;font-size:10pt;font-weight:400;line-height:115%">&#9746;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:115%">&#160;&#160;No&#160;&#160;</span><span style="color:#000000;font-family:'Arial Unicode MS',sans-serif;font-size:10pt;font-weight:400;line-height:115%">&#9744;</span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. 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Forward-looking statements are neither historical facts nor assurances of future performance. Instead, they are based on our current beliefs, expectations and assumptions regarding the future of our business, future plans and strategies, our clinical results and other future conditions. The words &#8220;aim,&#8221; &#8220;anticipate,&#8221; &#8220;believe,&#8221; &#8220;contemplate,&#8221; &#8220;continue,&#8221; &#8220;could,&#8221; &#8220;estimate,&#8221; &#8220;expect,&#8221; &#8220;goal,&#8221; &#8220;intend,&#8221; &#8220;may,&#8221; &#8220;on track,&#8221; &#8220;plan,&#8221; &#8220;possible,&#8221; &#8220;potential,&#8221; &#8220;predict,&#8221; &#8220;project,&#8221; &#8220;seek,&#8221; &#8220;should,&#8221; &#8220;target,&#8221; &#8220;will,&#8221; &#8220;would&#8221; or the negative of these terms or other similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words.</span></div><div style="margin-bottom:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">These forward-looking statements include, among other things, statements about:</span></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the initiation, cost, timing, progress and results of our current and future research and development activities, preclinical studies and clinical trials;</span></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the adequacy of our inventory of upifitamab rilsodotin, or UpRi, XMT-1660, XMT-2056 and our other  product candidates to support our ongoing and planned clinical trials, as well as the outcome of planned manufacturing runs;</span></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the timing of, and our ability to obtain and maintain, regulatory approvals for our product candidates;</span></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">unmet needs in ovarian cancer, breast cancer and other cancer treatment;</span></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">our ability to quickly and efficiently identify and develop additional product candidates;</span></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">our ability to advance any product candidate into, and successfully complete, clinical trials;</span></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">our intellectual property position, including with respect to our trade secrets;</span></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the potential benefits of strategic partnership agreements and our ability to enter into selective strategic partnerships;</span></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">our estimates regarding expenses, future revenues, capital requirements, the sufficiency of our current and expected cash resources and our need for additional financing; and</span></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the potential impact of the ongoing COVID-19 pandemic.</span></div><div style="margin-bottom:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We may not actually achieve the plans, intentions or expectations disclosed in our forward-looking statements, and you should not place undue reliance on our forward-looking statements. Actual results or events could differ materially from the plans, intentions and expectations disclosed in the forward-looking statements we make. We have included important factors in the cautionary statements included in this Quarterly Report on Form 10-Q for the quarterly period ended September&#160;30, 2022, particularly in the &#8220;Risk Factors&#8221; section, that we believe could cause actual results or events to differ materially from the forward-looking statements that we make. Our forward-looking statements do not reflect the potential impact of any future acquisitions, mergers, dispositions, joint ventures or investments we may make.</span></div><div style="margin-bottom:9pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In addition, the ongoing COVID-19 pandemic could adversely affect our preclinical and clinical development efforts, business operations and financial results. The extent of the impact and the value of and market for our common stock will depend on future developments that are highly uncertain and cannot be predicted with confidence at this time, such as the ultimate duration of the pandemic, the emergence of new variants of the virus, travel restrictions, quarantines, physical distancing and business closure requirements in the United States and in other countries, and the effectiveness of actions taken globally to contain and treat the disease.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">2</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div></div><div style="margin-bottom:9pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:112%">The forward-looking statements contained herein represent our views as of the date of this Quarterly Report on Form 10-Q and we do not assume any obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law. We anticipate that subsequent events and developments will cause our views to change. You should, therefore, not rely on these forward-looking statements as representing our views as of any date subsequent to the date of this Quarterly Report on Form 10-Q.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">This Quarterly Report on Form 10-Q may include industry and market data, which we may obtain from our own internal estimates and research, as well as from industry and general publications and research, surveys, and studies conducted by third parties. Industry publications, studies, and surveys generally state that they have been obtained from sources believed to be reliable, although they do not guarantee the accuracy or completeness of such information. While we believe that such studies and publications are reliable, we have not independently verified market and industry data from third&#8209;party sources.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">RISK FACTORS SUMMARY</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our business is subject to varying degrees of risk and uncertainty. Investors should consider the risks and uncertainties summarized below, as well as the risks and uncertainties discussed in Part II, Item 1A, Risk Factors of this Quarterly Report on Form 10-Q.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our business is subject to the following principal risks and uncertainties:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">We have incurred net losses since our inception, we have no products approved for commercial sale and we anticipate that we will continue to incur substantial operating losses for the foreseeable future.</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">We will require substantial additional financing to achieve our goals, and a failure to obtain this necessary capital when needed could force us to delay, limit, reduce or terminate our product development or commercialization efforts.</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">We have a credit facility that requires us to meet certain affirmative and negative covenants and places restrictions on our operating and financial flexibility.</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">We face substantial competition, which may result in others discovering, developing or commercializing products before, or more successfully than, we do.</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">We only have a limited number of product candidates in current or planned clinical trials. A failure of any of our current or future product candidates in clinical development could adversely affect our business and may require us to discontinue development of other product candidates based on the same technology.</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">We can provide no assurance that our product candidates will obtain regulatory approval or that the results of clinical trials will be favorable.</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">Drug discovery and development is a complex, time-consuming and expensive process that is fraught with risk and a high rate of failure. We can provide no assurance of the successful and timely development of new antibody-drug conjugate, or ADC, products.</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">If we fail to attract and retain senior management and key scientific personnel, we may be unable to successfully develop our product candidates, conduct our clinical trials and commercialize our product candidates.</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">We may encounter difficulties in managing our growth and expanding our operations successfully.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">3</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">Our activities, including our interactions with healthcare providers, third party payors, patients and government officials, are, and will continue to be, subject to extensive regulation involving health care, anti-corruption, data privacy and security and consumer protection laws. Failure to comply with applicable laws could result in substantial penalties, contractual damages, reputational harm, diminished revenues and curtailment or restructuring of our operations.</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">We rely upon patents and other intellectual property rights to protect our technology. We may be unable to protect our intellectual property rights, and we may be liable for infringing the intellectual property rights of others.</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">Our business is subject to risks arising from the outbreaks of disease, such as epidemics or pandemics, including the ongoing COVID-19 pandemic.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">4</span></div></div></div><div id="i036c42b7cd7942de8867eb61947b1b1c_10"></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">TABLE OF CONTENTS</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:93.611%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:4.189%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Page</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_13">PART&#160;I&#160;&#8211; FINANCIAL INFORMATION</a></span></div></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:11.25pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_16">Item 1. Financial Statements (unaudited)</a></span></div></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:24.75pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_19">Condensed Consolidated Balance Sheets as of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_19">September</a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_19"> 30, 2022 and December 31, 2021</a></span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="text-align:right"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:none" href="#i036c42b7cd7942de8867eb61947b1b1c_19">6</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:24.75pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_22">Condensed Consolidated Statements of Operations and Comprehensive Loss for the three and </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_22">nine</a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_22"> months ended </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_22">September</a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_22"> 30, 2022 and 2021</a></span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="text-align:right"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:none" href="#i036c42b7cd7942de8867eb61947b1b1c_22">7</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:24.75pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_25">Condensed Consolidated Statements of Stockholders&#8217; Equity for the three and </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_25">nine</a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_25"> months ended</a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_25"> </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_25">September</a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_25"> 30, 2022 and 2021</a></span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="text-align:right"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:none" href="#i036c42b7cd7942de8867eb61947b1b1c_25">8</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:24.75pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_28">Condensed Consolidated Statements of Cash Flows for the </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_28">nine</a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_28"> months ended </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_28">September</a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_28"> 30, 2022 and 2021</a></span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="text-align:right"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:none" href="#i036c42b7cd7942de8867eb61947b1b1c_28">9</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:11.25pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_31">Notes&#160;to Condensed Consolidated Financial Statements</a></span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="text-align:right"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:none" href="#i036c42b7cd7942de8867eb61947b1b1c_31">10</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:11.25pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_73">Item&#160;2. Management&#8217;s Discussion and Analysis of Financial Condition and Results of Operations</a></span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="text-align:right"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:none" href="#i036c42b7cd7942de8867eb61947b1b1c_73">29</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:11.25pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_79">Item&#160;3. Quantitative and Qualitative Disclosures About Market Risk</a></span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="text-align:right"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:none" href="#i036c42b7cd7942de8867eb61947b1b1c_79">41</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:11.25pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_82">Item&#160;4. Controls and Procedures</a></span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="text-align:right"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:none" href="#i036c42b7cd7942de8867eb61947b1b1c_82">42</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_85">PART&#160;II&#160;- OTHER INFORMATION</a></span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="text-align:right"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:none" href="#i036c42b7cd7942de8867eb61947b1b1c_85">43</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:11.25pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_88">Item&#160;1. Legal Proceedings</a></span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="text-align:right"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:none" href="#i036c42b7cd7942de8867eb61947b1b1c_88">43</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:11.25pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_91">Item 1A. Risk Factors</a></span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="text-align:right"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:none" href="#i036c42b7cd7942de8867eb61947b1b1c_91">43</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:11.25pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_94">Item 2. Unregistered Sales of Equity Securities and Use of Proceeds</a></span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="text-align:right"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:none" href="#i036c42b7cd7942de8867eb61947b1b1c_94">91</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:11.25pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_97">Item&#160;6. Exhibits</a></span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="text-align:right"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:none" href="#i036c42b7cd7942de8867eb61947b1b1c_97">92</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:11.25pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_103">Signatures</a></span></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="text-align:right"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:none" href="#i036c42b7cd7942de8867eb61947b1b1c_103">93</a></span></div></td></tr></table></div><div style="margin-bottom:12pt"><span><br/></span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">5</span></div></div></div><div id="i036c42b7cd7942de8867eb61947b1b1c_13"></div><hr style="page-break-after:always"/><div style="min-height:36pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">PART&#160;I&#160;&#8211; FINANCIAL INFORMATION</span></div><div style="margin-bottom:12pt"><span><br/></span></div><div id="i036c42b7cd7942de8867eb61947b1b1c_16"></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Item&#160;1.&#160;Financial Statements</span></div><div style="margin-bottom:12pt"><span><br/></span></div><div id="i036c42b7cd7942de8867eb61947b1b1c_19"></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Condensed Consolidated Balance Sheets</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(in thousands, except share and per share data)</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:70.214%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.842%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.601%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.843%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30,<br/>2022</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">December 31,<br/>2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Assets</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Current assets:</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Cash and cash equivalents</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:CashAndCashEquivalentsAtCarryingValue" format="ixt:num-dot-decimal" scale="3" 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Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:CashAndCashEquivalentsAtCarryingValue" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMy0zLTEtMS00NzkwMQ_487d0053-cf09-4438-a74d-d6e47378f84c">177,947</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Short-term marketable securities</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:DebtSecuritiesAvailableForSaleExcludingAccruedInterest" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfNC0xLTEtMS00NzkwMQ_23e99f43-30db-4156-bfde-27cb19e40aed">106,044</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" 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style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Prepaid expenses and other current assets</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:PrepaidExpenseAndOtherAssetsCurrent" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfNi0xLTEtMS00NzkwMQ_3f0adc9c-91ad-4cc2-aa4b-351bed1df6aa">9,911</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:PrepaidExpenseAndOtherAssetsCurrent" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfNi0zLTEtMS00NzkwMQ_92377e70-fc67-4937-930a-01a470ca035d">10,951</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total current assets</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:AssetsCurrent" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfNy0xLTEtMS00NzkwMQ_9f6c7f94-2f7f-4284-9732-9216acc8414d">300,037</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:AssetsCurrent" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfNy0zLTEtMS00NzkwMQ_b07705a0-f1cf-4db4-a66d-24221fc78133">188,898</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New 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style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfOC0zLTEtMS00NzkwMQ_1d76f6e5-8342-42a5-8677-b7db0f5ff6c9">1,968</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Operating lease right-of-use assets</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:OperatingLeaseRightOfUseAsset" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfOS0xLTEtMS00NzkwMQ_15cce606-92f6-43df-8069-2aa2cb510bfa">11,061</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New 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noncurrent</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:OtherAssetsNoncurrent" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMTAtMS0xLTEtNDc5MDE_7d2f2e8b-0061-4fee-b720-9fefb48eda5f">616</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:OtherAssetsNoncurrent" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMTAtMy0xLTEtNDc5MDE_041e422e-fd73-49d6-adb9-171b0601ee27">2,356</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total assets</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:Assets" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMTEtMS0xLTEtNDc5MDE_67b679dc-f0e3-44ce-a8b7-ee77861e4d5c">314,850</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:Assets" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMTEtMy0xLTEtNDc5MDE_64b964a7-a1c3-48d2-b3f9-696a62df9b53">206,111</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Liabilities and stockholders&#8217; equity</span></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:3pt double #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Current liabilities:</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accounts payable</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:AccountsPayableCurrent" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMTQtMS0xLTEtNDc5MDE_9fc6b3f8-2720-4305-a0c6-85f88ae047da">13,732</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:AccountsPayableCurrent" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMTQtMy0xLTEtNDc5MDE_b9976782-3de0-4352-95cf-506b2f531e27">12,321</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accrued expenses</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:AccruedLiabilitiesCurrent" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMTUtMS0xLTEtNDc5MDE_3367b8f2-62d7-49b7-811c-3e001a129b06">41,204</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:AccruedLiabilitiesCurrent" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMTUtMy0xLTEtNDc5MDE_a5477a98-5683-429e-9121-a3ebc376e1d4">28,716</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Deferred revenue</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:ContractWithCustomerLiabilityCurrent" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMTYtMS0xLTEtNDc5MDE_5ce9f6cd-90ff-41f7-a647-142a32a603c2">30,924</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:ContractWithCustomerLiabilityCurrent" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMTYtMy0xLTEtNDc5MDE_7cd181fb-09c6-4313-bbe6-2344e0088ba6">3,944</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Operating lease liabilities</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:OperatingLeaseLiabilityCurrent" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMTctMS0xLTEtNDc5MDE_e36750a3-69d9-4a49-bfdb-55d2474c05a1">2,697</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:OperatingLeaseLiabilityCurrent" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMTctMy0xLTEtNDc5MDE_f2502507-f5aa-479d-a87a-b630a6465191">2,303</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Other current liabilities</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:OtherLiabilitiesCurrent" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMTktMS0xLTEtNDc5MDE_5321cab5-9b52-403b-a255-86323d4727b0">237</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:OtherLiabilitiesCurrent" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMTktMy0xLTEtNDc5MDE_a8e034de-bddf-4c2e-b77e-d11a6d90fc20">239</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total current liabilities</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:LiabilitiesCurrent" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjAtMS0xLTEtNDc5MDE_be39fbdb-96c1-46fd-8574-6d745fc351e9">88,794</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:LiabilitiesCurrent" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjAtMy0xLTEtNDc5MDE_731536b2-205a-4cc4-9793-ee145d6d65ac">47,523</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Operating lease liabilities, noncurrent</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:OperatingLeaseLiabilityNoncurrent" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjEtMS0xLTEtNDc5MDE_1f3d5f67-7000-4ab6-bdcc-51915cf98605">9,291</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:OperatingLeaseLiabilityNoncurrent" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjEtMy0xLTEtNDc5MDE_3f3aaa97-edbe-48f9-ac5c-35b260dd22d9">11,247</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Long-term debt, net</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:LongTermDebt" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjItMS0xLTEtNDc5MDE_be72594c-c341-4f52-ac86-6b37d6f1b7d5">24,853</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:LongTermDebt" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjItMy0xLTEtNDc5MDE_a4a1a30a-5df1-4aaf-be7d-6d2b26b0ba29">24,626</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Deferred revenue, noncurrent</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:ContractWithCustomerLiabilityNoncurrent" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjMtMS0xLTEtNDc5MDE_86a55d44-e185-4728-8e4f-c90bf69cf14c">101,417</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:ContractWithCustomerLiabilityNoncurrent" format="ixt:fixed-zero" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjMtMy0xLTEtNDc5MDE_64282404-f9a2-4ab1-bdc5-71af177ce0b4">&#8212;</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Other liabilities, noncurrent</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:OtherLiabilitiesNoncurrent" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjQtMS0xLTEtNDc5MDE_81e8222b-2e26-410c-86d3-745d7d7ad34d">266</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:OtherLiabilitiesNoncurrent" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjQtMy0xLTEtNDc5MDE_1c85ac01-d05d-4f7e-b61b-c3f67528eaf0">974</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total liabilities</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:Liabilities" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjUtMS0xLTEtNDc5MDE_f15f1783-ffe8-4d5c-97ba-da661a61617e">224,621</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:Liabilities" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjUtMy0xLTEtNDc5MDE_b8dc7634-22ef-4d3b-8d2c-c5ade36827c6">84,370</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Commitments (Note 11)</span></td><td colspan="3" style="background-color:#ffffff;border-top:1pt solid #000000;padding:0 1pt"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" xsi:nil="true" name="us-gaap:CommitmentsAndContingencies" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjYtMS0xLTEtNDc5MDE_d7158407-3963-431d-a7e2-e67cde54f64e"></ix:nonFraction></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-top:1pt solid #000000;padding:0 1pt"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" xsi:nil="true" name="us-gaap:CommitmentsAndContingencies" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjYtMy0xLTEtNDc5MDE_3fdfa5b7-d551-42fa-924c-109bf393e878"></ix:nonFraction></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Stockholders' equity:</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Preferred stock, $<ix:nonFraction unitRef="usdPerShare" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="INF" name="us-gaap:PreferredStockParOrStatedValuePerShare" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjgtMC0xLTEtNDc5MDEvdGV4dHJlZ2lvbjoyZDM2NDQ0ZWUxYzc0YjEyYjFiMmEzNmJkZDE4ODUyOV8yMQ_109309d7-3e43-4182-aed7-892880d3f837"><ix:nonFraction unitRef="usdPerShare" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="INF" name="us-gaap:PreferredStockParOrStatedValuePerShare" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjgtMC0xLTEtNDc5MDEvdGV4dHJlZ2lvbjoyZDM2NDQ0ZWUxYzc0YjEyYjFiMmEzNmJkZDE4ODUyOV8yMQ_c5e1aea7-0b81-487e-a3f2-0f50fc9812b8">0.0001</ix:nonFraction></ix:nonFraction> par value; <ix:nonFraction unitRef="shares" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="INF" name="us-gaap:PreferredStockSharesAuthorized" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjgtMC0xLTEtNDc5MDEvdGV4dHJlZ2lvbjoyZDM2NDQ0ZWUxYzc0YjEyYjFiMmEzNmJkZDE4ODUyOV8zNQ_ae2e6c43-2859-450d-a32c-ec51f88559b8"><ix:nonFraction unitRef="shares" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="INF" name="us-gaap:PreferredStockSharesAuthorized" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjgtMC0xLTEtNDc5MDEvdGV4dHJlZ2lvbjoyZDM2NDQ0ZWUxYzc0YjEyYjFiMmEzNmJkZDE4ODUyOV8zNQ_d5e7feba-8f8f-49af-b8fe-4afee782a9c6">25,000,000</ix:nonFraction></ix:nonFraction> shares authorized; <ix:nonFraction unitRef="shares" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="INF" name="us-gaap:PreferredStockSharesOutstanding" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjgtMC0xLTEtNDc5MDEvdGV4dHJlZ2lvbjoyZDM2NDQ0ZWUxYzc0YjEyYjFiMmEzNmJkZDE4ODUyOV81Nw_16969f1c-cf10-42a9-8c6d-6628d60da0b1"><ix:nonFraction unitRef="shares" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="INF" name="us-gaap:PreferredStockSharesOutstanding" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjgtMC0xLTEtNDc5MDEvdGV4dHJlZ2lvbjoyZDM2NDQ0ZWUxYzc0YjEyYjFiMmEzNmJkZDE4ODUyOV81Nw_650f2d34-2bf6-4bac-ab44-52a385386a1d"><ix:nonFraction unitRef="shares" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="INF" name="us-gaap:PreferredStockSharesIssued" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjgtMC0xLTEtNDc5MDEvdGV4dHJlZ2lvbjoyZDM2NDQ0ZWUxYzc0YjEyYjFiMmEzNmJkZDE4ODUyOV81Nw_79c2f7d6-56e4-4ded-b0b3-cdf6a287b0cb"><ix:nonFraction unitRef="shares" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="INF" name="us-gaap:PreferredStockSharesIssued" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjgtMC0xLTEtNDc5MDEvdGV4dHJlZ2lvbjoyZDM2NDQ0ZWUxYzc0YjEyYjFiMmEzNmJkZDE4ODUyOV81Nw_83d9c360-b9fa-42ae-902a-56c3194732ea">0</ix:nonFraction></ix:nonFraction></ix:nonFraction></ix:nonFraction> shares issued and outstanding at September&#160;30, 2022 and December&#160;31, 2021, respectively</span></div></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:PreferredStockValue" format="ixt:fixed-zero" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjgtMS0xLTEtNDc5MDE_248b8829-5ccb-4167-a5f0-14c99e3fa419">&#8212;</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:PreferredStockValue" format="ixt:fixed-zero" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjgtMy0xLTEtNDc5MDE_fce3df97-a5fc-440e-9149-328cf1014832">&#8212;</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Common stock, $<ix:nonFraction unitRef="usdPerShare" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="INF" name="us-gaap:CommonStockParOrStatedValuePerShare" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjktMC0xLTEtNDc5MDEvdGV4dHJlZ2lvbjo2ZTEyYzlmNDRjY2E0OTJmOGIzYjJmYjQ4OTM4YzU0Y18xOA_25a37f67-62e4-4233-8c3f-05823c561e59"><ix:nonFraction unitRef="usdPerShare" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="INF" name="us-gaap:CommonStockParOrStatedValuePerShare" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjktMC0xLTEtNDc5MDEvdGV4dHJlZ2lvbjo2ZTEyYzlmNDRjY2E0OTJmOGIzYjJmYjQ4OTM4YzU0Y18xOA_bf68a65b-a36e-41c9-8ac1-3128c7810235">0.0001</ix:nonFraction></ix:nonFraction> par value; <ix:nonFraction unitRef="shares" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="INF" name="us-gaap:CommonStockSharesAuthorized" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjktMC0xLTEtNDc5MDEvdGV4dHJlZ2lvbjo2ZTEyYzlmNDRjY2E0OTJmOGIzYjJmYjQ4OTM4YzU0Y18zMg_74a6040f-509f-4f9c-9df6-8e421a0f0b14">350,000,000</ix:nonFraction> and <ix:nonFraction unitRef="shares" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="INF" name="us-gaap:CommonStockSharesAuthorized" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjktMC0xLTEtNDc5MDEvdGV4dHJlZ2lvbjo2ZTEyYzlmNDRjY2E0OTJmOGIzYjJmYjQ4OTM4YzU0Y18zOQ_e715b22f-dc03-4b7f-881b-e018717ff970">175,000,000</ix:nonFraction> shares authorized at September&#160;30, 2022 and December&#160;31, 2021, respectively ; <ix:nonFraction unitRef="shares" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="INF" name="us-gaap:CommonStockSharesIssued" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjktMC0xLTEtNDc5MDEvdGV4dHJlZ2lvbjo2ZTEyYzlmNDRjY2E0OTJmOGIzYjJmYjQ4OTM4YzU0Y184OQ_57911d79-6483-4ff5-b923-8686ea707f32"><ix:nonFraction unitRef="shares" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="INF" name="us-gaap:CommonStockSharesOutstanding" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjktMC0xLTEtNDc5MDEvdGV4dHJlZ2lvbjo2ZTEyYzlmNDRjY2E0OTJmOGIzYjJmYjQ4OTM4YzU0Y184OQ_c9bdcf81-ada4-4db4-9bbc-b379a706466d">98,582,583</ix:nonFraction></ix:nonFraction> and <ix:nonFraction unitRef="shares" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="INF" name="us-gaap:CommonStockSharesIssued" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjktMC0xLTEtNDc5MDEvdGV4dHJlZ2lvbjo2ZTEyYzlmNDRjY2E0OTJmOGIzYjJmYjQ4OTM4YzU0Y185Ng_0fb08e52-482f-4feb-8e53-6e2ef1dc5e14"><ix:nonFraction unitRef="shares" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="INF" name="us-gaap:CommonStockSharesOutstanding" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjktMC0xLTEtNDc5MDEvdGV4dHJlZ2lvbjo2ZTEyYzlmNDRjY2E0OTJmOGIzYjJmYjQ4OTM4YzU0Y185Ng_70091c27-c225-444d-9379-cb2ad3f1e196">73,709,056</ix:nonFraction></ix:nonFraction>&#160;shares issued and outstanding at September&#160;30, 2022 and December&#160;31, 2021, respectively</span></div></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:CommonStockValue" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjktMS0xLTEtNDc5MDE_e4f4d373-3b05-4437-b34e-682e649d8518">10</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:CommonStockValue" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMjktMy0xLTEtNDc5MDE_deaaf1ff-5a8b-4cf5-a4c4-db9952f1238a">7</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Additional paid-in capital</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:AdditionalPaidInCapitalCommonStock" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMzAtMS0xLTEtNDc5MDE_1c2207e4-a574-4c24-a603-a00c8d70719b">700,217</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:AdditionalPaidInCapitalCommonStock" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMzAtMy0xLTEtNDc5MDE_04a66190-690f-47b4-ac36-dc8152a03d76">572,213</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accumulated 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1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax" format="ixt:fixed-zero" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMzEtMy0xLTEtNDc5MDE_4077280e-2285-4cf2-97f6-5405cacb24d5">&#8212;</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accumulated deficit</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" sign="-" name="us-gaap:RetainedEarningsAccumulatedDeficit" format="ixt:num-dot-decimal" scale="3" 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id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMzItMy0xLTEtNDc5MDE_f88e0ac0-9122-4ddd-96e8-0eb05f7eec49">450,479</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total stockholders&#8217; equity</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New 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id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMzQtMS0xLTEtNDc5MDE_c7ae9d79-1001-447a-8a2a-62ce37da93a5">314,850</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:LiabilitiesAndStockholdersEquity" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18xOS9mcmFnOmZjMmNjNWQ5NWU4YjQ2YWM4NzgxMDQ1NDI4MWQ5Yjk2L3RhYmxlOjhhMDljYzk1ZWM3NjQ4ZmI4ZjUyMmZkNzIzNjdiNjIxL3RhYmxlcmFuZ2U6OGEwOWNjOTVlYzc2NDhmYjhmNTIyZmQ3MjM2N2I2MjFfMzQtMy0xLTEtNDc5MDE_93dfd568-549f-4543-84a0-4d75335d06f6">206,111</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-bottom:12pt;text-align:center"><span><br/></span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The accompanying notes are an integral part of these condensed consolidated financial statements.</span></div><div style="margin-bottom:12pt"><span><br/></span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">6</span></div></div></div><div id="i036c42b7cd7942de8867eb61947b1b1c_22"></div><hr style="page-break-after:always"/><div style="min-height:36pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Condensed Consolidated Statements of Operations and Comprehensive Loss</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(in thousands, except share and per share data)</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:45.534%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.720%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.601%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.720%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.441%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.720%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.441%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.723%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three Months Ended<br/>September 30,</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended<br/>September 30,</span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Collaboration revenue</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="-3" name="us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax" format="ixt:num-dot-decimal" scale="3" 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style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" decimals="-3" name="us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMi0zLTEtMS00NzkwMQ_6a241f75-4294-4d41-913b-be6553f6902e">11</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" name="us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax" format="ixt:num-dot-decimal" scale="3" 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style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMi03LTEtMS00NzkwMQ_8bf6459d-d84a-4f69-893b-2a499742c144">32</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New 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0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" decimals="-3" name="us-gaap:GeneralAndAdministrativeExpense" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfNS0zLTEtMS00NzkwMQ_1609345d-2612-4245-b3af-9ee937b4b165">10,124</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" name="us-gaap:GeneralAndAdministrativeExpense" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfNS01LTEtMS00NzkwMQ_2043a298-cc72-41ff-997c-8c6f9c01e9a1">42,158</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:GeneralAndAdministrativeExpense" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfNS03LTEtMS00NzkwMQ_fff82a95-fb24-40da-8967-52703d6e25e3">26,214</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 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id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfNi0xLTEtMS00NzkwMQ_590aad8a-7aa7-4ebb-844a-9c34b4d6267f">65,212</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" decimals="-3" name="us-gaap:OperatingExpenses" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfNi0zLTEtMS00NzkwMQ_f7e1d74a-d1ca-4d80-ac00-2a23d71b6068">45,399</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" name="us-gaap:OperatingExpenses" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfNi01LTEtMS00NzkwMQ_b98b42e7-4ce2-4753-9b7a-aa81e6280fe4">169,834</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:OperatingExpenses" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfNi03LTEtMS00NzkwMQ_e92c0dd1-1b2b-42e4-864c-cd718b304992">120,859</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Other income (expense):</span></td><td colspan="3" style="background-color:#ffffff;padding:0 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contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="-3" name="us-gaap:InvestmentIncomeInterest" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfOC0xLTEtMS00NzkwMQ_fc42171c-7161-4fba-852e-bf36ead46399">708</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" decimals="-3" name="us-gaap:InvestmentIncomeInterest" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfOC0zLTEtMS00NzkwMQ_e7dc9353-1bdc-4c5f-af10-c780f03d1cf9">15</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" name="us-gaap:InvestmentIncomeInterest" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfOC01LTEtMS00NzkwMQ_bf8d7f2e-e321-4b9f-be8b-620262adb437">1,017</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:InvestmentIncomeInterest" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfOC03LTEtMS00NzkwMQ_702ffbb2-70d7-49e0-ae0e-678cd3fd40ef">36</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Interest expense</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="-3" name="us-gaap:InterestExpense" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfOS0xLTEtMS00NzkwMQ_7416ec29-1d4c-438f-a087-01ec45f857bc">880</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" decimals="-3" name="us-gaap:InterestExpense" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfOS0zLTEtMS00NzkwMQ_af4ab585-5881-43fa-bd69-25be6905f14a">98</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" name="us-gaap:InterestExpense" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfOS01LTEtMS00NzkwMQ_9847332d-ae4c-4f77-aea1-04a0c6391d59">2,364</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:InterestExpense" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfOS03LTEtMS00NzkwMQ_99a27255-b0aa-49a8-b16e-b9f1cc7d7da1">286</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total other income (expense), net</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="-3" sign="-" name="us-gaap:NonoperatingIncomeExpense" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTAtMS0xLTEtNDc5MDE_e76ccaa8-3643-4c20-ab76-8d433e44bace">172</ix:nonFraction>)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" decimals="-3" sign="-" name="us-gaap:NonoperatingIncomeExpense" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTAtMy0xLTEtNDc5MDE_5d289df7-0d28-4e7d-b249-02a9e9354b9a">83</ix:nonFraction>)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" sign="-" name="us-gaap:NonoperatingIncomeExpense" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTAtNS0xLTEtNDc5MDE_98a2f931-e696-443e-8f40-514c1cb15a06">1,347</ix:nonFraction>)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" sign="-" name="us-gaap:NonoperatingIncomeExpense" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTAtNy0xLTEtNDc5MDE_6e7d628c-97e8-491c-8d56-b58e4b434dae">250</ix:nonFraction>)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Net loss</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="-3" sign="-" name="us-gaap:NetIncomeLoss" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTEtMS0xLTEtNDc5MDE_c6f6d19b-c60a-4e0d-ae0a-abccb398d3ca">59,811</ix:nonFraction>)</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" decimals="-3" sign="-" name="us-gaap:NetIncomeLoss" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTEtMy0xLTEtNDc5MDE_06de47a3-ab4d-4d7d-a5cf-3e0464121789">45,471</ix:nonFraction>)</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" sign="-" name="us-gaap:NetIncomeLoss" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTEtNS0xLTEtNDc5MDE_ab945eaf-4572-402e-b0a2-c17df42a5fdb">159,288</ix:nonFraction>)</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" sign="-" name="us-gaap:NetIncomeLoss" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTEtNy0xLTEtNDc5MDE_78b04706-8c55-4cbf-b503-b06eb0f81e4b">121,077</ix:nonFraction>)</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Other comprehensive loss</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Unrealized loss on marketable securities</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="-3" sign="-" name="us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTMtMS0xLTEtNDc5MDE_448d6e01-a0cb-4713-aaa2-d77b620c7f03">105</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" decimals="-3" name="us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent" format="ixt:fixed-zero" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTMtMy0xLTEtNDc5MDE_db3641d4-8606-4808-a4df-506569a79434">&#8212;</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" sign="-" name="us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTMtNS0xLTEtNDc5MDE_0465ae33-d9a5-4cfa-99f7-1c141f0ca95e">231</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent" format="ixt:fixed-zero" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTMtNy0xLTEtNDc5MDE_81050d59-97fb-4b85-a3e6-28d82b0d079a">&#8212;</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Comprehensive loss</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="-3" sign="-" name="us-gaap:ComprehensiveIncomeNetOfTax" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTQtMS0xLTEtNDc5MDE_38d7ca1f-022f-47f8-9c58-83b9f1ca59ec">59,916</ix:nonFraction>)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" decimals="-3" sign="-" name="us-gaap:ComprehensiveIncomeNetOfTax" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTQtMy0xLTEtNDc5MDE_52c6b5d2-6dfc-4e29-a541-0725dbfbea7c">45,471</ix:nonFraction>)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" sign="-" name="us-gaap:ComprehensiveIncomeNetOfTax" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTQtNS0xLTEtNDc5MDE_a57843d8-69b6-4c78-aee2-7f6388ea0850">159,519</ix:nonFraction>)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" sign="-" name="us-gaap:ComprehensiveIncomeNetOfTax" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTQtNy0xLTEtNDc5MDE_7b8b9855-3953-4a3a-94b3-377e9ac70c5d">121,077</ix:nonFraction>)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Net loss attributable to common stockholders &#8212; basic and diluted</span></td><td style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="-3" sign="-" name="us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTUtMS0xLTEtNDc5MDE_43d9bb5f-525e-48dd-864b-e466a80362c5"><ix:nonFraction unitRef="usd" contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="-3" sign="-" name="us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTUtMS0xLTEtNDc5MDE_8f32b10b-ebd0-4649-a6fb-7d908c6ff88c">59,811</ix:nonFraction></ix:nonFraction>)</span></td><td style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" decimals="-3" sign="-" name="us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTUtMy0xLTEtNDc5MDE_37df63ac-8292-4395-9528-3a630e0a60fe"><ix:nonFraction unitRef="usd" contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" decimals="-3" sign="-" name="us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTUtMy0xLTEtNDc5MDE_e6490327-be7c-450a-b11c-b819ec4fdf7a">45,471</ix:nonFraction></ix:nonFraction>)</span></td><td style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" sign="-" name="us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTUtNS0xLTEtNDc5MDE_3a7ef136-fe66-402b-b13a-3a54c4b59e32"><ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" sign="-" name="us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTUtNS0xLTEtNDc5MDE_8c309da3-249a-4b7b-80ac-e8fc70e211a2">159,288</ix:nonFraction></ix:nonFraction>)</span></td><td style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" sign="-" name="us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTUtNy0xLTEtNDc5MDE_1892e029-d0c3-4f47-83aa-611794e3bc22"><ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" sign="-" name="us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTUtNy0xLTEtNDc5MDE_f6db5309-a478-4770-8628-bd9623a3b70b">121,077</ix:nonFraction></ix:nonFraction>)</span></td><td style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Net loss per share attributable to common stockholders &#8212; basic and diluted</span></td><td style="background-color:#cceeff;border-top:3pt double #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:3pt double #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usdPerShare" contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="2" sign="-" name="us-gaap:EarningsPerShareDiluted" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTYtMS0xLTEtNDc5MDE_459e3e42-d1e2-4436-b6bf-97bfed9f2633"><ix:nonFraction unitRef="usdPerShare" contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="2" sign="-" name="us-gaap:EarningsPerShareBasic" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTYtMS0xLTEtNDc5MDE_94be7f48-f9f2-4fc9-8bea-f3161f6f3105">0.61</ix:nonFraction></ix:nonFraction>)</span></td><td style="background-color:#cceeff;border-top:3pt double #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:3pt double #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:3pt double #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usdPerShare" contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" decimals="2" sign="-" name="us-gaap:EarningsPerShareDiluted" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTYtMy0xLTEtNDc5MDE_b36f76a3-f6e6-451d-af8d-6301ec80653d"><ix:nonFraction unitRef="usdPerShare" contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" decimals="2" sign="-" name="us-gaap:EarningsPerShareBasic" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTYtMy0xLTEtNDc5MDE_bfcfdbcd-bdbf-465c-92ac-bbb35467f018">0.63</ix:nonFraction></ix:nonFraction>)</span></td><td style="background-color:#cceeff;border-top:3pt double #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:3pt double #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:3pt double #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usdPerShare" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="2" sign="-" name="us-gaap:EarningsPerShareDiluted" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTYtNS0xLTEtNDc5MDE_9528205c-c3ea-4df7-849b-c55a56e5f870"><ix:nonFraction unitRef="usdPerShare" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="2" sign="-" name="us-gaap:EarningsPerShareBasic" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTYtNS0xLTEtNDc5MDE_e44db228-9b06-4f50-9730-28bedc52b3e0">1.75</ix:nonFraction></ix:nonFraction>)</span></td><td style="background-color:#cceeff;border-top:3pt double #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:3pt double #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:3pt double #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usdPerShare" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="2" sign="-" name="us-gaap:EarningsPerShareBasic" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTYtNy0xLTEtNDc5MDE_a3365efc-d9a1-4378-93b6-7b1278c099de"><ix:nonFraction unitRef="usdPerShare" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="2" sign="-" name="us-gaap:EarningsPerShareDiluted" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTYtNy0xLTEtNDc5MDE_c612e466-e711-4241-b507-83f414b622fa">1.73</ix:nonFraction></ix:nonFraction>)</span></td><td style="background-color:#cceeff;border-top:3pt double #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Weighted-average number of shares of common stock used in net loss per share attributable to common stockholders &#8212; basic and diluted</span></td><td colspan="2" style="background-color:#ffffff;border-bottom:3pt double #000;border-top:3pt double #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="0" name="us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding" format="ixt:num-dot-decimal" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTgtMS0xLTEtNDc5MDE_3cb161b3-d452-431a-a62d-2f54798c74ac"><ix:nonFraction unitRef="shares" contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="0" name="us-gaap:WeightedAverageNumberOfSharesOutstandingBasic" format="ixt:num-dot-decimal" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTgtMS0xLTEtNDc5MDE_4c131b86-9909-4d50-9d6f-ed6c85d8663f">97,641,936</ix:nonFraction></ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:3pt double #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-bottom:3pt double #000;border-top:3pt double #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" decimals="0" name="us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding" format="ixt:num-dot-decimal" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTgtMy0xLTEtNDc5MDE_3f26db9e-aea1-402b-a52c-13e85aeab3db"><ix:nonFraction unitRef="shares" contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" decimals="0" name="us-gaap:WeightedAverageNumberOfSharesOutstandingBasic" format="ixt:num-dot-decimal" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTgtMy0xLTEtNDc5MDE_c540287d-4bb4-4b0a-9596-bc43e32adcb4">71,753,004</ix:nonFraction></ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:3pt double #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-bottom:3pt double #000;border-top:3pt double #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="0" name="us-gaap:WeightedAverageNumberOfSharesOutstandingBasic" format="ixt:num-dot-decimal" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTgtNS0xLTEtNDc5MDE_4bbab00e-591e-4fec-ab84-027fa4867592"><ix:nonFraction unitRef="shares" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="0" name="us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding" format="ixt:num-dot-decimal" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTgtNS0xLTEtNDc5MDE_5b2d332f-2941-48de-806d-25476608a3b6">91,173,989</ix:nonFraction></ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:3pt double #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-bottom:3pt double #000;border-top:3pt double #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="0" name="us-gaap:WeightedAverageNumberOfSharesOutstandingBasic" format="ixt:num-dot-decimal" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTgtNy0xLTEtNDc5MDE_5fd1c4f6-df0b-4f39-bd0a-67068b552415"><ix:nonFraction unitRef="shares" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="0" name="us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding" format="ixt:num-dot-decimal" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yMi9mcmFnOjNkNjY2ODk4ZDUzNjQwNzJiNjY1MTE1MTE0OTQ4MzgzL3RhYmxlOmQwOGQ2YWIwZWRiOTQ5ZGI5ODdhODBkMDE4YTE5ODZiL3RhYmxlcmFuZ2U6ZDA4ZDZhYjBlZGI5NDlkYjk4N2E4MGQwMThhMTk4NmJfMTgtNy0xLTEtNDc5MDE_8227a229-24d6-4045-8a05-5a5020c7065e">70,129,236</ix:nonFraction></ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:3pt double #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr></table></div><div style="margin-bottom:12pt;text-align:center"><span><br/></span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The accompanying notes are an integral part of these condensed consolidated financial statements.</span></div><div style="margin-bottom:12pt"><span><br/></span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">7</span></div></div></div><div id="i036c42b7cd7942de8867eb61947b1b1c_25"></div><hr style="page-break-after:always"/><div style="min-height:27pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Condensed Consolidated Statements of Stockholders&#8217; Equity</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(in thousands, except share data)</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:36.880%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:7.393%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.441%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:6.592%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.441%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:10.278%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.441%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:10.278%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.441%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:8.515%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.441%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:9.159%"></td><td style="width:0.1%"></td></tr><tr style="height:21pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:700;line-height:100%">Common&#160;Stock</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" rowspan="2" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:700;line-height:100%">Additional  Paid-in Capital</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" rowspan="2" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:700;line-height:100%">Accumulated <br/>Other Comprehensive<br/>Income (Loss)</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" rowspan="2" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:700;line-height:100%">Accumulated <br/>Deficit</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" rowspan="2" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:700;line-height:100%">Stockholders&#8217; <br/>Equity</span></td></tr><tr style="height:12pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:700;line-height:100%">Shares</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:700;line-height:100%">Amount</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">Balance at December 31, 2020</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="ib0e6033a9de747dbac68f27cd571cdc0_I20201231" decimals="INF" name="us-gaap:SharesOutstanding" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNTEtMS0xLTEtNDc5MDE_28e9ce10-60fd-471c-bb69-8d79a7d35595">68,841,288</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ib0e6033a9de747dbac68f27cd571cdc0_I20201231" decimals="-3" name="us-gaap:StockholdersEquity" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNTEtMy0xLTEtNDc5MDE_c770102c-2f8c-42e3-86c4-dbd1cfd71a86">7</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ib9a4eb5317db4a6b8e411409ed76a79a_I20201231" decimals="-3" name="us-gaap:StockholdersEquity" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNTEtNS0xLTEtNDc5MDE_84e05a91-63d1-4e8f-9443-15858b2f881c">508,499</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times 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1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="if24c3dfc7e1547dab0c3b7585a2ef622_D20210101-20210331" decimals="-3" name="us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation" scale="3" 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style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ib1e3f19cb1164f199dbf32a0018cd643_D20210101-20210331" decimals="-3" name="us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation" scale="3" 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0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i1c823d0badd845658a192e2d6dddcd6c_I20210331" decimals="-3" name="us-gaap:StockholdersEquity" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNTYtMy0xLTEtNDc5MDE_abf33a2d-0887-4e17-86ba-8a5ae791a76f">7</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-top:1pt solid 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id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNTYtNS0xLTEtNDc5MDE_4809b4fe-b1ec-42cd-b99b-4d788cd24740">513,043</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times 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Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="i68043815a36b4627a0fab25f9b3691bb_I20210331" decimals="-3" sign="-" name="us-gaap:StockholdersEquity" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNTYtOS0xLTEtNDc5MDE_ab139c06-eb2c-4f9d-b652-a7ab7b520461">315,112</ix:nonFraction>)</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i258c67fad5d2462b9cbc1022737821e1_I20210331" decimals="-3" name="us-gaap:StockholdersEquity" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNTYtMTEtMS0xLTQ3OTAx_f74bfb57-8f24-425a-81c8-129948302f19">197,938</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">Issuance of common stock from at-the-market transactions, net of issuance costs of $<ix:nonFraction unitRef="usd" contextRef="if0344409690a465696db27b649c7d346_D20210401-20210630" decimals="-3" 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style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i99ba5d61ad3e4e56b3760ac6711a9bc7_D20210401-20210630" decimals="-3" name="us-gaap:StockIssuedDuringPeriodValueNewIssues" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNTctNS0xLTEtNDc5MDE_80e467ae-e2f9-40fc-b3f2-dd22fd546bc3">33,287</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New 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0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i99ba5d61ad3e4e56b3760ac6711a9bc7_D20210401-20210630" decimals="-3" name="us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNTgtNS0xLTEtNDc5MDE_8703c531-564e-4ce0-b961-c63f9e730384">202</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i14c9345b44b743db86370ea9f5468bc8_D20210401-20210630" decimals="-3" name="us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNTgtMTEtMS0xLTQ3OTAx_9f29fa37-c5e2-4156-8a75-62f8212d0d3c">202</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">Purchase of common stock under ESPP</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New 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style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i99ba5d61ad3e4e56b3760ac6711a9bc7_D20210401-20210630" decimals="-3" name="us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNTktNS0xLTEtNDc5MDE_6aa1434f-3b3a-4160-906b-97083094a2ad">417</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i14c9345b44b743db86370ea9f5468bc8_D20210401-20210630" decimals="-3" name="us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNTktMTEtMS0xLTQ3OTAx_5960dafe-6aee-4b8e-9f0e-55af199f3597">417</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">Stock-based compensation expense</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i99ba5d61ad3e4e56b3760ac6711a9bc7_D20210401-20210630" decimals="-3" name="us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNjAtNS0xLTEtNDc5MDE_46fe4ce1-7a6b-41aa-8c19-84e5daec673c">4,582</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New 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contextRef="i14c9345b44b743db86370ea9f5468bc8_D20210401-20210630" decimals="-3" name="us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNjAtMTEtMS0xLTQ3OTAx_696595d4-9012-45ab-9aeb-03452b5ac778">4,582</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">Net loss</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New 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0 2px 1pt;text-align:left;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="id0b3c405cb3243bead8d25c87c105d75_I20210630" decimals="-3" name="us-gaap:StockholdersEquity" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNjItMy0xLTEtNDc5MDE_6b84b4e5-134d-4bdf-9d0c-6a47958b1331">7</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-top:1pt solid 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Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ia35b4f7bdd654fa0886457e9643f3af0_I20210630" decimals="-3" sign="-" name="us-gaap:StockholdersEquity" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNjItOS0xLTEtNDc5MDE_bb799faf-1719-4cd4-a2ee-ff7f8a9f68f8">356,025</ix:nonFraction>)</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i808536f0644b4e4d906ad1e9f5974d3e_I20210630" decimals="-3" name="us-gaap:StockholdersEquity" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNjItMTEtMS0xLTQ3OTAx_dcf99938-e366-4e88-9e83-dd4da2bc08e4">195,513</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">Exercise of stock options</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New 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id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNjMtNS0xLTEtNDc5MDE_2dd92494-b163-4730-9db9-b0c2a6c71444">579</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" 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Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 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style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" decimals="-3" name="us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNjUtMTEtMS0xLTQ3OTAx_5ec1ad4f-eb05-4b35-8291-cb22b91d6833">4,928</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">Net loss</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New 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Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="i9d5f8ae42bf14ca1ab7daf8c5a18d213_I20210930" decimals="-3" sign="-" name="us-gaap:StockholdersEquity" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNjctOS0xLTEtNDc5MDE_3fee82ec-0c72-4e27-a372-931b51bbf4c7">401,496</ix:nonFraction>)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="iaca4d8e8d21f4aaba26f31a7d752612f_I20210930" decimals="-3" name="us-gaap:StockholdersEquity" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNjctMTEtMS0xLTQ3OTAx_ca633c48-ec8c-4c01-b619-3726552a13c5">155,549</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr style="height:6pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-top:3pt double #000;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-top:3pt double #000;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-top:3pt double #000;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-top:3pt double #000;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-top:3pt double #000;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;border-top:3pt double #000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">Balance at December 31, 2021</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="i5b8306dea3dc459b981dee2d8229131d_I20211231" decimals="INF" name="us-gaap:SharesOutstanding" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNzUtMS0xLTEtNDc5MDE_71de6df7-dfa7-4362-8af5-10d3cf424174">73,709,056</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5b8306dea3dc459b981dee2d8229131d_I20211231" decimals="-3" name="us-gaap:StockholdersEquity" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNzUtMy0xLTEtNDc5MDE_412afbcc-6759-42b3-9607-13aad576544c">7</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i63dc74aa836d4bb19aa5a16bebbcf2ec_I20211231" decimals="-3" name="us-gaap:StockholdersEquity" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNzUtNS0xLTEtNDc5MDE_b44b3560-f6b7-491d-8199-05f46f2abc38">572,213</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="i04045bb7225a4c84920f5ba5bef1ec4f_I20211231" decimals="-3" sign="-" name="us-gaap:StockholdersEquity" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNzUtOS0xLTEtNDc5MDE_753b00d8-6e09-4ffe-a796-8a6008847a11">450,479</ix:nonFraction>)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:StockholdersEquity" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNzUtMTEtMS0xLTQ3OTAx_6ba4315b-3836-4c48-af27-f1b06f891daf">121,741</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">Issuance of common stock from at-the-market transactions, net of issuance costs of $<ix:nonFraction unitRef="usd" contextRef="ia7bbc71fd81d4a66bc43bd51c83872b3_D20220101-20220331" decimals="-3" name="mrsn:StockIssuanceDiscountsAndCommissionsOnTransaction" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNzYtMC0xLTEtNDc5MDEvdGV4dHJlZ2lvbjo1ZDA3MmZiNjAxNGM0YWUwYTU3OTEwZDk5YzZhZTZhN184Nw_b3052c02-f430-4ad8-8cb9-e33836c61aff">1,322</ix:nonFraction></span></div></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" 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contextRef="i1489836698524501972a3a7c2146e675_D20220101-20220331" decimals="-3" name="us-gaap:StockIssuedDuringPeriodValueNewIssues" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfNzYtMy0xLTEtNDc5MDE_33affafc-3b4d-4681-8f52-e8440a81cac0">2</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" 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id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfODAtOS0xLTEtNDc5MDE_75cee140-7297-4f1a-965f-87f82c10ac6d">47,258</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ice87ef80e352422f8447c6b863b9d13b_D20220101-20220331" decimals="-3" sign="-" name="us-gaap:NetIncomeLoss" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfODAtMTEtMS0xLTQ3OTAx_d3d09624-a689-41d5-8094-af56f06a223a">47,258</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">Balance at March 31, 2022</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New 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style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i1a4d1a70e1da4309a40cbbe547d843a9_I20220331" decimals="-3" name="us-gaap:StockholdersEquity" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfODEtNS0xLTEtNDc5MDE_b8f0e4d8-4a31-48b3-9124-c97b08067421">638,254</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="i4025e813eadf400c9166437851dae2b8_I20220331" decimals="-3" sign="-" name="us-gaap:StockholdersEquity" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfODEtOS0xLTEtNDc5MDE_cc5eb3c3-7cd2-4f60-aeea-5a1e27e551d2">497,737</ix:nonFraction>)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="id1cf2eec0f5d43f390b993c18c9796e8_I20220331" decimals="-3" name="us-gaap:StockholdersEquity" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfODEtMTEtMS0xLTQ3OTAx_6fb683e2-3674-4635-aabb-7471b1c721f2">140,526</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">Issuance of common stock from at-the-market transactions, net of issuance costs of $<ix:nonFraction unitRef="usd" contextRef="ifabac9be04c54016a51bb637bff691d0_D20220401-20220630" decimals="-3" name="mrsn:StockIssuanceDiscountsAndCommissionsOnTransaction" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfODItMC0xLTEtNDc5MDEvdGV4dHJlZ2lvbjoxNzE0NTllZGNmMDI0MzQzOTdmOWIzNTM0ZjMzZTE5M184Nw_522fb2af-b67f-40a9-ad52-805cb9ebcefd">941</ix:nonFraction></span></div></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="i1b1167c936354b4b8dc14bfca859b83c_D20220401-20220630" decimals="INF" name="us-gaap:StockIssuedDuringPeriodSharesNewIssues" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfODItMS0xLTEtNDc5MDE_0d028e3c-602b-45b3-a106-695a7b2889b8">9,904,964</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i1b1167c936354b4b8dc14bfca859b83c_D20220401-20220630" decimals="-3" name="us-gaap:StockIssuedDuringPeriodValueNewIssues" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfODItMy0xLTEtNDc5MDE_86d522d4-9772-44a6-969f-0b3a1e24e2ae">1</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ieed32d4464da4e7c84963245af1f3df3_D20220401-20220630" decimals="-3" name="us-gaap:StockIssuedDuringPeriodValueNewIssues" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfODItNS0xLTEtNDc5MDE_2f95a79b-97d8-49b1-b094-52a6173e826c">39,898</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i7faec66f35eb476caf33a3707ebd0c6d_D20220401-20220630" decimals="-3" name="us-gaap:StockIssuedDuringPeriodValueNewIssues" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfODItMTEtMS0xLTQ3OTAx_ec0173e7-b4c7-48b0-b9a1-215567ef01c5">39,899</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">Exercise of common stock warrant</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="i1b1167c936354b4b8dc14bfca859b83c_D20220401-20220630" decimals="INF" name="mrsn:WarrantsExercisedInPeriod" format="ixt:num-dot-decimal" scale="0" 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style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ieed32d4464da4e7c84963245af1f3df3_D20220401-20220630" decimals="-3" name="us-gaap:AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfODYtNS0xLTEtNDc5MDE_f0fce546-46cd-4aa5-b61d-b4aee94ea131">606</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 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style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ieed32d4464da4e7c84963245af1f3df3_D20220401-20220630" decimals="-3" name="us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfODctNS0xLTEtNDc5MDE_c0f87fbe-0c63-4979-bc39-5f4fe7bd9dad">5,348</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 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style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i7faec66f35eb476caf33a3707ebd0c6d_D20220401-20220630" decimals="-3" name="us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfODctMTEtMS0xLTQ3OTAx_34d8d94c-224d-45c4-8b4c-0ce2029c851d">5,348</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td></tr><tr><td colspan="3" 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id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfODgtNy0xLTEtNDc5MDE_0c0a98e7-5973-4fdf-b760-18ad0030f0e5">126</ix:nonFraction>)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="i7faec66f35eb476caf33a3707ebd0c6d_D20220401-20220630" decimals="-3" sign="-" name="us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfODgtMTEtMS0xLTQ3OTAx_1ecd2cd3-c050-4d60-b77b-3e4770d2d8a0">126</ix:nonFraction>)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">Net loss</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="id2d0e11f6cb541fa864bedfcbe8bb137_D20220401-20220630" decimals="-3" sign="-" name="us-gaap:NetIncomeLoss" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfODktOS0xLTEtNDc5MDE_c73825b7-26f3-4550-b8df-f76ad2eb9052">52,219</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 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2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i73c817a6d1224c97b77eb9741ba172f5_I20220630" decimals="-3" name="us-gaap:StockholdersEquity" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfOTAtMy0xLTEtNDc5MDE_427b0c2f-1077-4028-ae1f-63a289c346e6">10</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ica972848b04744f0b3a4bdfa2a7c553f_I20220630" decimals="-3" name="us-gaap:StockholdersEquity" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfOTAtNS0xLTEtNDc5MDE_0921086c-be4b-4880-84c8-42ff898fc698">684,106</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="i7795f7af804244dba4dbb254b955f7d7_I20220630" decimals="-3" sign="-" name="us-gaap:StockholdersEquity" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfOTAtNy0xLTEtNDc5MDE_a16cb207-d899-402c-addc-ceb1d7d4c4da">126</ix:nonFraction>)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="i9a2ac656dc0f49a99a65cd8a555b5f3b_I20220630" decimals="-3" sign="-" name="us-gaap:StockholdersEquity" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfOTAtOS0xLTEtNDc5MDE_c0642fdc-d67e-4193-abec-3b4bfc21a677">549,956</ix:nonFraction>)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i1780c56ed2c842fe90fbdd1bb68250db_I20220630" decimals="-3" name="us-gaap:StockholdersEquity" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfOTAtMTEtMS0xLTQ3OTAx_657802bd-9a54-4604-9ab6-6116dacaec08">134,034</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:6pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">Issuance of common stock from at-the-market transactions, net of issuance costs of $<ix:nonFraction unitRef="usd" contextRef="i1c06b296feb348be98d1827fce25229c_D20220701-20220930" decimals="-3" name="mrsn:StockIssuanceDiscountsAndCommissionsOnTransaction" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfOTMtMC0xLTEtNDc5MDEvdGV4dHJlZ2lvbjpkZTg2MDYxYmE1NTA0OTFkYjliNWVmOTI5YWFlY2JkMF83MTQ2ODI1NTgwNjUx_1f55bfb0-bb21-4a0e-93bc-3274bac973c4">251</ix:nonFraction></span></div></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New 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Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i3ed829b8563d438c934fac527a19d747_D20220701-20220930" decimals="-3" name="us-gaap:StockIssuedDuringPeriodValueNewIssues" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfOTMtNS0xLTEtNDc5MDE_eae3067f-1ae9-411a-8a63-065d69d369bb">10,626</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="-3" name="us-gaap:StockIssuedDuringPeriodValueNewIssues" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfOTMtMTEtMS0xLTQ3OTAx_1481cf70-6fcc-4265-92ae-f2c484c15863">10,626</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">Exercise of stock options</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="i35e4473f897b4ea9ab78bf83dfd90f8f_D20220701-20220930" decimals="INF" name="us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfOTQtMS0xLTEtNDc5MDE_7dcb769b-9977-4e48-a500-ed642305a1aa">27,348</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i3ed829b8563d438c934fac527a19d747_D20220701-20220930" decimals="-3" name="us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfOTQtNS0xLTEtNDc5MDE_4f1aecfb-1335-4904-a13b-a2b4362a63c7">110</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="-3" name="us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfOTQtMTEtMS0xLTQ3OTAx_7ec5378b-70ae-4374-9764-a7aa0056ad6c">110</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">Vesting of restricted stock units</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="i35e4473f897b4ea9ab78bf83dfd90f8f_D20220701-20220930" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfOTYtMS0xLTEtNDc5MDE_e4532395-2b88-4206-aa7f-fdedeeab5c52">6,250</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">Stock-based compensation expense</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i3ed829b8563d438c934fac527a19d747_D20220701-20220930" decimals="-3" name="us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfOTYtNS0xLTEtNDg4Nzk_b1f5181a-5e3c-439e-9592-a0ebb77d799a">5,375</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="-3" name="us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfOTYtMTEtMS0xLTQ4ODc5_a21a46e0-a96e-49ed-b20d-6997401a253d">5,375</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">Other comprehensive loss</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New 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style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="if877971cfd0447ac8b875857fb7d9f64_I20220930" decimals="-3" sign="-" name="us-gaap:StockholdersEquity" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yNS9mcmFnOjQ0YWIwYjc5YTA3NTQyMWZiYjQxYmIwMDVmYmViNTQ2L3RhYmxlOmVmNGJjODNhZjRkNjRmMzViN2U0YWYyY2E2ZmFlMGE3L3RhYmxlcmFuZ2U6ZWY0YmM4M2FmNGQ2NGYzNWI3ZTRhZjJjYTZmYWUwYTdfOTgtNy0xLTEtNDc5MDE_412d6b13-57a1-4f24-8064-a8a7011f6f95">231</ix:nonFraction>)</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 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style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:7pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:StockholdersEquity" format="ixt:num-dot-decimal" scale="3" 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style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">8</span></div></div></div><div id="i036c42b7cd7942de8867eb61947b1b1c_28"></div><hr style="page-break-after:always"/><div style="min-height:36pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Condensed Consolidated Statements of Cash Flows</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(in thousands)</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:70.214%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.842%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.601%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.843%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended<br/>September 30,</span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Cash flows from operating activities</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Net loss</span></td><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" sign="-" name="us-gaap:ProfitLoss" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMy0xLTEtMS00NzkwMQ_b0db1b13-0245-4527-af4a-04f0ebae6e98">159,288</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" sign="-" name="us-gaap:ProfitLoss" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMy0zLTEtMS00NzkwMQ_bd29fb1e-6703-48e2-b3e6-80e321e6709f">121,077</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Adjustments to reconcile net loss to net cash used in operating activities:</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Depreciation</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times 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13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Net amortization of premiums and discounts on marketable securities</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" name="us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfNy0xLTEtMS00NzkwMQ_b2964f09-134c-4ef4-8e8e-d54cbf67365a">396</ix:nonFraction>)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments" format="ixt:fixed-zero" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfNy0zLTEtMS00NzkwMQ_aa9d2bea-c156-41aa-b724-65bac55b5807">&#8212;</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Stock-based compensation</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" name="us-gaap:ShareBasedCompensation" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfOC0xLTEtMS00NzkwMQ_958da967-9258-4229-8d78-097dd135411d">16,208</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:ShareBasedCompensation" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfOC0zLTEtMS00NzkwMQ_be2afd32-1c14-4162-adde-f606a71fa5be">13,549</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Other non-cash items</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" sign="-" name="us-gaap:OtherNoncashIncomeExpense" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfOS0xLTEtMS00NzkwMQ_ba38b05c-de72-4e08-86d7-2d1f04d3b8c3">574</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" sign="-" name="us-gaap:OtherNoncashIncomeExpense" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfOS0zLTEtMS00NzkwMQ_4df0bb5a-c197-415d-80b9-02822c35804b">119</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Changes in operating assets and liabilities:</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 19pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Prepaid expenses and other current assets</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" sign="-" name="us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMTItMS0xLTEtNDc5MDE_1c9e37b7-b553-4d29-b85b-05596a543dbb">2,459</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMTItMy0xLTEtNDc5MDE_0a344f11-7bbb-43cd-9fbe-6e2ae644056f">4,104</ix:nonFraction>)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 19pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New 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0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:IncreaseDecreaseInOtherOperatingAssets" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMTMtMy0xLTEtNDc5MDE_316705d2-cb66-45c0-b3d1-098456c6e5d1">617</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 19pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accounts payable</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" name="us-gaap:IncreaseDecreaseInAccountsPayable" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMTQtMS0xLTEtNDc5MDE_4e5eaa13-8999-46e3-b0a5-0e7ad5344aed">1,153</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" sign="-" name="us-gaap:IncreaseDecreaseInAccountsPayable" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMTQtMy0xLTEtNDc5MDE_6d174e0c-ee17-4ef9-bca9-efb0f9f030ab">2,429</ix:nonFraction>)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 19pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accrued expenses</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" name="us-gaap:IncreaseDecreaseInAccruedLiabilities" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMTUtMS0xLTEtNDc5MDE_048a2ed5-de44-4c7b-af51-8d9f14ba166d">11,848</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:IncreaseDecreaseInAccruedLiabilities" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMTUtMy0xLTEtNDc5MDE_27d612d2-1d22-4e47-92a4-116464cf7928">16,047</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 19pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Operating lease right-of-use assets</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" name="mrsn:IncreaseDecreaseInOperatingLeaseAssets" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMTYtMS0xLTEtNDc5MDE_eb5c5587-b550-4c0b-845c-0e1f382efbf1">2,127</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="mrsn:IncreaseDecreaseInOperatingLeaseAssets" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMTYtMy0xLTEtNDc5MDE_476582bd-946d-440a-a2e6-c4bdfaffdc84">1,548</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 19pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Operating lease liabilities</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" sign="-" name="us-gaap:IncreaseDecreaseInOperatingLeaseLiability" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMTctMS0xLTEtNDc5MDE_fc0cf5c8-5635-43ce-ba56-f724271d1d94">1,861</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" sign="-" name="us-gaap:IncreaseDecreaseInOperatingLeaseLiability" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMTctMy0xLTEtNDc5MDE_167901da-f6ff-4393-a558-81d07fd3d72a">1,236</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 19pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Deferred revenue</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" name="us-gaap:IncreaseDecreaseInContractWithCustomerLiability" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMTktMS0xLTEtNDc5MDE_04f38e36-4862-46b1-a386-d8654ad97aac">128,397</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" sign="-" name="us-gaap:IncreaseDecreaseInContractWithCustomerLiability" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMTktMy0xLTEtNDc5MDE_9f133bbe-e389-4d8a-97f2-efb5a148dfd4">32</ix:nonFraction>)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Net cash provided by (used in) operating activities</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" name="us-gaap:NetCashProvidedByUsedInOperatingActivities" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMjAtMS0xLTEtNDc5MDE_78d11bb4-76ea-4c2c-b77a-37ab96a5447c">1,866</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" sign="-" name="us-gaap:NetCashProvidedByUsedInOperatingActivities" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMjAtMy0xLTEtNDc5MDE_3467d159-4dc9-412a-8fa2-3a2efa329b1d">97,588</ix:nonFraction>)</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:12pt"><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Cash flows from investing activities</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Maturities of marketable securities</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" 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0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt" format="ixt:fixed-zero" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMjQtMy0xLTEtNDc5MDE_45881637-7635-4ecc-b8bb-4e254e45af3f">&#8212;</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Purchase of property and equipment</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" name="us-gaap:PaymentsToAcquirePropertyPlantAndEquipment" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMjUtMS0xLTEtNDc5MDE_679d5d54-05a3-4c7c-b789-678cfb2da9a4">1,412</ix:nonFraction>)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:PaymentsToAcquirePropertyPlantAndEquipment" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMjUtMy0xLTEtNDc5MDE_05aa10d2-1600-41a2-a02d-c1ea13427bcc">493</ix:nonFraction>)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Net cash used in investing activities</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" sign="-" name="us-gaap:NetCashProvidedByUsedInInvestingActivities" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMjYtMS0xLTEtNDc5MDE_818babd1-7822-4156-a72f-c4733911b391">107,290</ix:nonFraction>)</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" sign="-" name="us-gaap:NetCashProvidedByUsedInInvestingActivities" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMjYtMy0xLTEtNDc5MDE_ff4665df-ebb7-466c-bcfa-e211fc95f309">493</ix:nonFraction>)</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:12pt"><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Cash flows from financing activities</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 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id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMzAtMS0xLTEtNDc5MDE_755f1035-3498-4237-b65b-aa289cc700ee">110,954</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:ProceedsFromIssuanceOfCommonStock" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMzAtMy0xLTEtNDc5MDE_9e38e366-4dd7-468d-af51-4d03fb1fddb5">33,287</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Proceeds from exercise of stock options</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New 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0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Payment of employee tax obligations related to vesting of restricted stock units</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" name="us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation" format="ixt:fixed-zero" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMzMtMS0xLTEtNDc5MDE_5d58c22a-f690-49ad-b1b6-c953acd06a2a">&#8212;</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMzMtMy0xLTEtNDc5MDE_cee1771b-90c0-4af2-8909-b2cef16e1000">259</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span 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0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:FinanceLeasePrincipalPayments" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMzYtMy0xLTEtNDc5MDE_7566bb9e-f780-4308-9646-1a56b37b1edf">139</ix:nonFraction>)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Net cash provided by financing activities</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" name="us-gaap:NetCashProvidedByUsedInFinancingActivities" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMzctMS0xLTEtNDc5MDE_5f24de12-d1a3-4dd4-bde0-d18dd58a484b">111,559</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:NetCashProvidedByUsedInFinancingActivities" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMzctMy0xLTEtNDc5MDE_b36d2e54-08e1-4ba1-ba82-e2b1d2d33d33">34,851</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr style="height:12pt"><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Increase (decrease) in cash, cash equivalents and restricted cash</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" name="us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMzktMS0xLTEtNDc5MDE_b3aaf879-6b76-4411-b87b-fff565200318">6,135</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" sign="-" name="us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfMzktMy0xLTEtNDc5MDE_8284e10a-9c5a-4375-9cce-8969b9309389">63,230</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Cash, cash equivalents and restricted cash, beginning of period</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfNDAtMS0xLTEtNDc5MDE_ab861546-86a2-4ddf-9d0e-5cc13e361476">178,425</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td 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Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:InterestPaidNet" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfNDctMy0xLTEtNDc5MDE_de014d9d-22f7-4b0b-8f55-01acb1285512">187</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Right-of-use assets obtained in exchange for operating lease liabilities</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-3" name="us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability" scale="3" 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Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18yOC9mcmFnOmM2MDQ2YWRmYTEyZjQzZTRhYjA2NzdiMGFhMDlmMmYzL3RhYmxlOjNhMTU1NDkwMWVmMjQ2MmQ4YWU0NzlmNjBjNTAxMjMxL3RhYmxlcmFuZ2U6M2ExNTU0OTAxZWYyNDYyZDhhZTQ3OWY2MGM1MDEyMzFfNDktMy0xLTEtNDc5MDE_01ee55d4-ea84-4722-810e-527046c76851">609</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr></table></div><div style="margin-bottom:12pt;text-align:center"><span><br/></span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The accompanying notes are an integral part of these condensed consolidated financial statements.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">9</span></div></div></div><div id="i036c42b7cd7942de8867eb61947b1b1c_31"></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Notes to condensed consolidated financial statements</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div></div><div style="text-align:center"><span><br/></span></div><div id="i036c42b7cd7942de8867eb61947b1b1c_34"></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">1.&#160;<ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:BusinessDescriptionAndBasisOfPresentationTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18zNC9mcmFnOmNiMDM4OTdlMjBmNjQ3YWE4OTEzYjcwY2MyNjFmNjQ2L3RleHRyZWdpb246Y2IwMzg5N2UyMGY2NDdhYTg5MTNiNzBjYzI2MWY2NDZfNjMwMg_3bc757e6-7069-4fde-b168-f2716d73f594" continuedAt="i39a44f9d8e18453dbc8e6fcc24336d71" escape="true">Nature of business and basis of presentation</ix:nonNumeric></span></div><ix:continuation id="i39a44f9d8e18453dbc8e6fcc24336d71" continuedAt="ifcd7754a83ff433fa1166f3699345301"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Mersana Therapeutics, Inc. is a clinical-stage biopharmaceutical company focused on developing antibody-drug conjugates ("ADCs") that offer a clinically meaningful benefit for cancer patients with significant unmet need. The Company has leveraged over 20 years of industry learning in the ADC field to develop proprietary and differentiated technology platforms that enable it to develop ADCs that are designed to have improved efficacy, safety and tolerability relative to existing ADC therapies. The Company&#8217;s innovative platforms include Dolaflexin and Dolasynthen, each of which deliver the DolaLock payload, as well as Immunosynthen, which delivers the novel stimulator of interferon genes ("STING") agonist ImmunoLock payload. The Company&#8217;s product candidates include upifitamab rilsodotin ("UpRi"), XMT-1660 and XMT-2056. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company's lead product candidate, UpRi, is a first-in-class Dolaflexin ADC targeting NaPi2b, an antigen broadly expressed in ovarian cancer and other cancers with limited expression in healthy tissues. The Company is currently evaluating UpRi in platinum-resistant ovarian cancer in a single-arm registrational trial, referred to as UPLIFT. The Company is also conducting a placebo-controlled Phase 3 clinical trial, referred to as UP-NEXT, to investigate UpRi as a single-agent maintenance treatment in patients with platinum-sensitive ovarian cancer that have high NaPi2b expression. Additionally, the Company is conducting a Phase 1/2  combination trial, referred to as UPGRADE-A. UPGRADE-A is exploring the combination of UpRi with carboplatin, a standard platinum chemotherapy broadly used in the treatment of platinum-sensitive ovarian cancer. The Company may explore other combinations as part of a series of UPGRADE trials in the future.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company is also investigating XMT-1660, a B7-H4-directed Dolasynthen ADC, in a Phase 1 clinical trial enrolling patients with solid tumors, including in breast, endometrial and ovarian cancers. Additionally, the Company is developing XMT-2056, an Immunosynthen STING-agonist ADC that targets a novel epitope of human epidermal growth factor receptor 2 ("HER2"). The Company also has two additional earlier stage preclinical candidates, XMT-2068 and XMT-2175, that leverage the Company's Immunosynthen platform and target tumor-associated antigens.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company is subject to risks common to companies in the biotechnology industry including, but not limited to, the need for additional capital, risks of failure of preclinical studies and clinical trials, the need to obtain marketing approval and reimbursement for any drug product candidate that it may identify and develop, the need to successfully commercialize and gain market acceptance of its product candidates, dependence on key personnel, protection of proprietary technology, compliance with government regulations, development of technological innovations by competitors, reliance on third party manufacturers and the ability to transition from pilot-scale production to large-scale manufacturing of products.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company has incurred cumulative net losses since inception. For the three months ended September&#160;30, 2022, the net loss was $<ix:nonFraction unitRef="usd" contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="-5" sign="-" name="us-gaap:NetIncomeLoss" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18zNC9mcmFnOmNiMDM4OTdlMjBmNjQ3YWE4OTEzYjcwY2MyNjFmNjQ2L3RleHRyZWdpb246Y2IwMzg5N2UyMGY2NDdhYTg5MTNiNzBjYzI2MWY2NDZfMzIzNg_4a71ef89-698d-43ae-b495-05fa29034631">59.8</ix:nonFraction> million, compared to $<ix:nonFraction unitRef="usd" contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" decimals="-5" sign="-" name="us-gaap:NetIncomeLoss" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18zNC9mcmFnOmNiMDM4OTdlMjBmNjQ3YWE4OTEzYjcwY2MyNjFmNjQ2L3RleHRyZWdpb246Y2IwMzg5N2UyMGY2NDdhYTg5MTNiNzBjYzI2MWY2NDZfMzI1Mg_b6b40421-4937-409a-9310-d0dde433f06d">45.5</ix:nonFraction> million in the three months ended September&#160;30, 2021. For the nine months ended September&#160;30, 2022, the net loss was $<ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-5" sign="-" name="us-gaap:NetIncomeLoss" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18zNC9mcmFnOmNiMDM4OTdlMjBmNjQ3YWE4OTEzYjcwY2MyNjFmNjQ2L3RleHRyZWdpb246Y2IwMzg5N2UyMGY2NDdhYTg5MTNiNzBjYzI2MWY2NDZfMzMyOA_cfaeffa2-a2e6-46d0-825e-6ca361220508">159.3</ix:nonFraction> million, compared to $<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-5" sign="-" name="us-gaap:NetIncomeLoss" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18zNC9mcmFnOmNiMDM4OTdlMjBmNjQ3YWE4OTEzYjcwY2MyNjFmNjQ2L3RleHRyZWdpb246Y2IwMzg5N2UyMGY2NDdhYTg5MTNiNzBjYzI2MWY2NDZfMzM0NA_770876c6-4a08-4540-aff4-23786fb95a2d">121.1</ix:nonFraction> million in the nine months ended September&#160;30, 2021. The Company expects to continue to incur operating losses for at least the next several years. As of September&#160;30, 2022, the Company had an accumulated deficit of $<ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-5" sign="-" name="us-gaap:RetainedEarningsAccumulatedDeficit" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18zNC9mcmFnOmNiMDM4OTdlMjBmNjQ3YWE4OTEzYjcwY2MyNjFmNjQ2L3RleHRyZWdpb246Y2IwMzg5N2UyMGY2NDdhYTg5MTNiNzBjYzI2MWY2NDZfMzUyMQ_160f7b44-e4a3-4715-a0a4-6d059ae610b3">609.8</ix:nonFraction> million. The future success of the Company is dependent on, among other factors, its ability to identify and develop its product candidates and ultimately upon its ability to attain profitable operations. The Company has devoted substantially all of its financial resources and efforts to research and development and general and administrative expense to support such research and development. Net losses and negative operating cash flows have had, and will continue to have, an adverse effect on the Company&#8217;s stockholders' equity and working&#160;capital.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company believes that its currently available funds will be sufficient to fund the Company&#8217;s operations through at least the next twelve months from the issuance of this Quarterly Report on Form 10-Q. Management&#8217;s belief with respect to its ability to fund operations is based on estimates that are subject to risks and uncertainties. If actual results are different from management&#8217;s estimates, the Company may need to seek additional funding.</span></div></ix:continuation><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">10</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:6pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Notes to condensed consolidated financial statements (continued)</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div></div><ix:continuation id="ifcd7754a83ff433fa1166f3699345301"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company&#8217;s unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States ("U.S.&#160;GAAP") and the rules and regulations of the Securities and Exchange Commission ("SEC"). Any reference in these notes to applicable guidance is meant to refer to the authoritative U.S. GAAP as found in the Accounting Standards Codification ("ASC") and Accounting Standards Updates ("ASU") of the Financial Accounting Standards Board ("FASB").</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with U.S. GAAP have been condensed or omitted from this report, as is permitted by such rules and regulations. Accordingly, these financial statements should be read in conjunction with the audited financial statements as of and for the year ended December&#160;31, 2021 and the notes thereto, included in the Company&#8217;s Annual Report on Form 10-K for the year ended December 31, 2021, filed with the SEC on February 28, 2022.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The unaudited condensed consolidated financial statements have been prepared on the same basis as the audited financial statements. In the opinion of the Company&#8217;s management, the accompanying unaudited condensed consolidated financial statements contain all adjustments that are necessary to present fairly the Company&#8217;s financial position as of September&#160;30, 2022, the results of its operations for the three and nine months ended September&#160;30, 2022 and 2021, the statements of stockholders&#8217; equity for the three and nine months ended September&#160;30, 2022 and 2021 and statements of cash flows for the nine months ended September&#160;30, 2022 and 2021. Such adjustments are of a normal and recurring nature. The results for the three and nine months ended September&#160;30, 2022 are not necessarily indicative of the results for the year ending December&#160;31, 2022, or for any future period.</span></div></ix:continuation><div style="margin-bottom:12pt"><span><br/></span></div><div id="i036c42b7cd7942de8867eb61947b1b1c_37"></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">2.&#160;<ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:SignificantAccountingPoliciesTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18zNy9mcmFnOmYzNjkzMGM3YmE4YTRmYjc5YzkwMTU3NTQ3YjQ5MDUxL3RleHRyZWdpb246ZjM2OTMwYzdiYThhNGZiNzljOTAxNTc1NDdiNDkwNTFfNjA4Nw_afa81b79-bae9-4cb8-829c-7a73b16af007" continuedAt="if7b979b83e0b4e988c71a8c858ba9d59" escape="true">Summary of significant accounting policies</ix:nonNumeric></span></div><ix:continuation id="if7b979b83e0b4e988c71a8c858ba9d59" continuedAt="ic084d84ef6b84ccfb0bce370b2432dad"><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:ConsolidationPolicyTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18zNy9mcmFnOmYzNjkzMGM3YmE4YTRmYjc5YzkwMTU3NTQ3YjQ5MDUxL3RleHRyZWdpb246ZjM2OTMwYzdiYThhNGZiNzljOTAxNTc1NDdiNDkwNTFfNjA5MA_35032a2f-05f4-4701-b069-f2cf6048e5c1" escape="true"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Principles of Consolidation</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The accompanying unaudited condensed consolidated financial statements include those of the Company and its wholly owned subsidiary, Mersana Securities Corp. All intercompany balances and transactions have been eliminated.</span></div></ix:nonNumeric><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:UseOfEstimates" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18zNy9mcmFnOmYzNjkzMGM3YmE4YTRmYjc5YzkwMTU3NTQ3YjQ5MDUxL3RleHRyZWdpb246ZjM2OTMwYzdiYThhNGZiNzljOTAxNTc1NDdiNDkwNTFfNjA5MQ_45060a1e-435a-47a0-a957-d43647903a75" escape="true"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of the Company&#8217;s unaudited condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, equity, revenue, expenses and related disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenue and expenses during the reporting period. On an ongoing basis, the Company&#8217;s management evaluates its estimates which include, but are not limited to, management&#8217;s judgments with respect to the identification of performance obligations and standalone selling prices of those performance obligations within its revenue arrangements, accrued preclinical, manufacturing and clinical expenses, valuation of stock-based awards and income taxes. Actual results could differ from those estimates.</span></div></ix:nonNumeric><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:SegmentReportingPolicyPolicyTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18zNy9mcmFnOmYzNjkzMGM3YmE4YTRmYjc5YzkwMTU3NTQ3YjQ5MDUxL3RleHRyZWdpb246ZjM2OTMwYzdiYThhNGZiNzljOTAxNTc1NDdiNDkwNTFfNjA4NA_cf4854bb-d91d-4548-8cd1-23ee4857e832" escape="true"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Segment Information</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Operating segments are defined as components of an enterprise about which separate discrete information is available for evaluation by the chief operating decision-maker, or decision making group, in deciding how to allocate resources and assess performance. The Company views its operations and manages its business as a single operating segment, which is the business of discovering and developing ADCs.</span></div></ix:nonNumeric><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Summary of Accounting Policies</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The significant accounting policies used in preparation of these condensed consolidated financial statements for the three and nine months ended September&#160;30, 2022 are consistent with those discussed in Note 2, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Summary of Significant Accounting Policies</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, in the Company&#8217;s Annual Report on Form 10-K for the year ended December 31, 2021.</span></div></ix:continuation><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:FairValueMeasurementPolicyPolicyTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18zNy9mcmFnOmYzNjkzMGM3YmE4YTRmYjc5YzkwMTU3NTQ3YjQ5MDUxL3RleHRyZWdpb246ZjM2OTMwYzdiYThhNGZiNzljOTAxNTc1NDdiNDkwNTFfNjA4OA_5c347209-aa30-4580-8fa8-6ee01eb70caf" continuedAt="ifa4b4cd171db44ecb1240404fe94de22" escape="true"></ix:nonNumeric><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">11</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:6pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Notes to condensed consolidated financial statements (continued)</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div></div><ix:continuation id="ic084d84ef6b84ccfb0bce370b2432dad" continuedAt="idfec9478882040698d2e8da039e5fe99"><ix:continuation id="ifa4b4cd171db44ecb1240404fe94de22"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Fair Value Measurements</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Fair value is defined as the price that would be received upon sale of an asset or paid to transfer a liability between market participants at measurement dates. ASC&#160;820,&#160;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Fair Value Measurement,</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> establishes a three-level valuation hierarchy for instruments measured at fair value. The hierarchy is based on the transparency of inputs to the valuation of an asset or liability as of the measurement date. The three levels are defined as follows:</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Level&#160;1&#8212;Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Level&#160;2&#8212;Inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Level&#160;3&#8212;Inputs to the valuation methodology are unobservable and significant to the fair value measurement.</span></div></ix:continuation><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:ConcentrationRiskCreditRisk" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18zNy9mcmFnOmYzNjkzMGM3YmE4YTRmYjc5YzkwMTU3NTQ3YjQ5MDUxL3RleHRyZWdpb246ZjM2OTMwYzdiYThhNGZiNzljOTAxNTc1NDdiNDkwNTFfNjA5Mg_0662b303-f7fa-48d8-8b6d-6f7f51bc5e69" continuedAt="i2ac55c30a985415d8c7b1d4603544ad3" escape="true"><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:OffBalanceSheetCreditExposurePolicyPolicyTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18zNy9mcmFnOmYzNjkzMGM3YmE4YTRmYjc5YzkwMTU3NTQ3YjQ5MDUxL3RleHRyZWdpb246ZjM2OTMwYzdiYThhNGZiNzljOTAxNTc1NDdiNDkwNTFfNjA5Mg_f26fe4f0-3653-43dc-82e6-0a3dd57ceab9" continuedAt="icbf740b01e3e433a94837e339e621fd6" escape="true">Concentration of Credit Risk and Off-balance Sheet Risk</ix:nonNumeric></ix:nonNumeric></span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"><ix:continuation id="i2ac55c30a985415d8c7b1d4603544ad3"><ix:continuation id="icbf740b01e3e433a94837e339e621fd6">Financial instruments that potentially subject the Company to concentrations of credit risk primarily consist of cash equivalents and marketable securities. Under its investment policy, the Company limits amounts invested in such securities by credit rating, maturity, industry group, investment type and issuer, except for securities issued by the U.S. government. The Company does not believe that it is subject to any significant concentrations of credit risk from these financial instruments. The Company has no financial instruments with off-balance sheet risk, such as foreign exchange contracts, option contracts, or other foreign hedging arrangements.</ix:continuation></ix:continuation> </span></div><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:MarketableSecuritiesPolicy" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18zNy9mcmFnOmYzNjkzMGM3YmE4YTRmYjc5YzkwMTU3NTQ3YjQ5MDUxL3RleHRyZWdpb246ZjM2OTMwYzdiYThhNGZiNzljOTAxNTc1NDdiNDkwNTFfNjA4NQ_241967cc-d419-4521-9eef-ff237caf58db" escape="true"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Marketable Securities</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company&#8217;s investment strategy is focused on capital preservation. The Company invests in instruments that meet the credit quality standards outlined in the Company&#8217;s investment policy. Short-term marketable securities consist of investments in debt securities with maturities greater than three months and less than one year from the balance sheet date. The Company classifies all of its marketable securities as available-for-sale. Accordingly, these investments are recorded at fair value. Fair value is determined based on quoted market prices. Amortization and accretion of discounts and premiums are recorded as interest income within other income (expense), net. Realized gains and losses are included in other income (expense), net. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company assesses its available-for-sale debt securities under the available-for-sale debt security impairment model in ASC 326, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Financial Instruments - Credit Losses</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, as of each reporting date in order to determine if a portion of any decline in fair value below carrying value recognized on its available-for-sale debt securities is the result of a credit loss. The Company records credit losses in the consolidated statements of operations and comprehensive loss as a component of other income (expense), net, which is limited to the difference between the fair value and the amortized cost of the security. To date, the Company has not recorded any credit losses on its available-for-sale debt securities.</span></div></ix:nonNumeric><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:CashAndCashEquivalentsPolicyTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18zNy9mcmFnOmYzNjkzMGM3YmE4YTRmYjc5YzkwMTU3NTQ3YjQ5MDUxL3RleHRyZWdpb246ZjM2OTMwYzdiYThhNGZiNzljOTAxNTc1NDdiNDkwNTFfNjA4OQ_98f617b0-a793-43cf-a006-03e78df8b2aa" escape="true"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Cash and Cash Equivalents</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company considers all highly-liquid investments with an original maturity, or a remaining maturity at the time of purchase, of three months or less to be cash equivalents. The Company invests excess cash primarily in money market funds, commercial paper and government agency securities, which are highly liquid and have strong credit ratings. The Company determined that these investments are subject to minimal credit and market risks. Cash and cash equivalents are stated at cost, which approximates market value.</span></div></ix:nonNumeric></ix:continuation><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">12</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:6pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Notes to condensed consolidated financial statements (continued)</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div></div><ix:continuation id="idfec9478882040698d2e8da039e5fe99"><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:NewAccountingPronouncementsPolicyPolicyTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18zNy9mcmFnOmYzNjkzMGM3YmE4YTRmYjc5YzkwMTU3NTQ3YjQ5MDUxL3RleHRyZWdpb246ZjM2OTMwYzdiYThhNGZiNzljOTAxNTc1NDdiNDkwNTFfNjA4Ng_388d7347-ea23-4bf0-8fc8-85c614a9b702" escape="true"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Recently Issued Accounting Pronouncements</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">From time to time, new accounting pronouncements are issued by the FASB or other standard setting bodies that the Company adopts as of the specified effective date. Unless otherwise discussed below, the Company does not believe that the adoption of recently issued standards have or may have a material impact on the Company's condensed consolidated financial statements or disclosures.</span></div></ix:nonNumeric></ix:continuation><div style="margin-bottom:12pt"><span><br/></span></div><div id="i036c42b7cd7942de8867eb61947b1b1c_40"></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">3.&#160;<ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:CollaborativeArrangementDisclosureTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTQ4Nzc_0b37bf9e-b00c-49d5-8fdf-a02b7013dde7" continuedAt="i7bca0f3ae07c4519bed4670de221e3ad" escape="true">Collaboration agreements</ix:nonNumeric></span></div><ix:continuation id="i7bca0f3ae07c4519bed4670de221e3ad" continuedAt="idd1d511189cf48a6936ffcd9b82752c5"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">GlaxoSmithKline Intellectual Property (No. 4) Limited</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">On August 6, 2022, the Company entered into a Collaboration, Option and License Agreement (the "GSK Agreement") with GlaxoSmithKline Intellectual Property (No. 4) Limited ("GSK"), pursuant to which the Company granted GSK an exclusive option to obtain an exclusive license (the &#8220;Option&#8221;) to co-develop and to commercialize products containing XMT-2056 (the "Licensed Products"), exercisable within a specified time period (the &#8220;Option Period&#8221;) after the Company delivers to GSK data resulting from completion of dose escalation with enrichment for breast cancer patients in a Phase 1 single-agent clinical trial of XMT-2056. GSK&#8217;s exercise of the Option may require clearance under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (&#8220;HSR Clearance&#8221; and GSK&#8217;s exercise of the Option following any applicable HSR Clearance, the &#8220;GSK Option Exercise&#8221;). Prior to the GSK Option Exercise, the Company will lead and will be responsible for the costs of manufacturing, research, and early clinical development related to its XMT-2056 program. After the GSK Option Exercise, if any, GSK may elect to manufacture XMT-2056, and GSK and the Company will co-develop XMT-2056 aimed at the approval of Licensed Product(s) in the United States and the European Union, with GSK being responsible for the majority of the development costs. GSK will be responsible for all development costs aimed solely at gaining approval outside the United States and European Union. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Pursuant to the GSK Agreement, following the GSK Option Exercise and subject to certain exceptions and specified payment obligations, the Company&#8217;s aggregate shared development costs are capped at a fixed amount, with any amounts in excess to be borne by GSK unless and until the Company exercises its option to receive (or bear) a specified share of U.S. profits (or losses) for any Licensed Products (&#8220;Profit Share Election&#8221;). The excess development costs will accrue interest as specified in the GSK Agreement and will later either be repaid by the Company or offset against future regulatory and sales milestones or royalty payments that may become due to the Company. If the Company exercises its Profit Share Election, the cap on the Company&#8217;s share of development costs shall no longer apply, and the Company must pay any then-outstanding excess plus accrued interest costs. Additionally, if the Company exercises its Profit Share Election, it may also simultaneously elect to co-promote any Licensed Products in the United States.    </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Pursuant to the GSK Agreement, GSK paid the Company a non-refundable, upfront fee of $<ix:nonFraction unitRef="usd" contextRef="i41c148fc858141c4bb995a59c9ea8257_I20220831" decimals="-5" name="us-gaap:ContractWithCustomerLiability" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfNTQ5NzU1ODU2MTgx_c2266608-e1e6-4b45-8a8e-c904316ac79b">100.0</ix:nonFraction>&#160;million in August 2022. Following the GSK Option Exercise, if any, GSK is obligated to pay the Company an option exercise payment of $<ix:nonFraction unitRef="usd" contextRef="i41c148fc858141c4bb995a59c9ea8257_I20220831" decimals="-6" name="mrsn:CollaborationArrangementPotentialOptionExerciseReceivable" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfNTQ5NzU1ODU2MzE1_25d9c5b4-5ff1-4a49-ba68-9374728f1e8d">90.0</ix:nonFraction>&#160;million (the "Option Payment"). The Company is eligible to receive future development, regulatory, and commercial milestone payments up to approximately $<ix:nonFraction unitRef="usd" contextRef="iac20ef229d2b4ad98770995a4f4f66eb_I20220831" decimals="-6" name="mrsn:CollaborationArrangementsMaximumAggregateMilestones" format="ixt:num-dot-decimal" scale="9" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfNTQ5NzU1ODU2NDQx_1e344631-9f43-4f1e-8e39-a29e74bfef0a">1.3</ix:nonFraction>&#160;billion and, if the Company does not exercise its Profit Share Election, tiered royalties up to the mid-twenty percent range based on global sales of Licensed Products. Included in the aggregate milestone payments amount is $<ix:nonFraction unitRef="usd" contextRef="ie0744119c6de45f5b0b54456a6a3c604_I20220831" decimals="-6" name="mrsn:CollaborationArrangementsMaximumAggregateMilestones" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTA5OTUxMTY4ODMyNg_0437e03c-f9ff-44f1-bc63-4db470107e88">30</ix:nonFraction>&#160;million that the Company is eligible to earn upon the satisfaction of early clinical development milestones that may occur prior to the GSK Option Exercise. If the Company exercises its Profit Share Election, the Company will be eligible to receive reduced development, regulatory, and commercial milestone payments and reduced royalty rates on sales outside of the United States. Whether or not the Company exercises its Profit Share Election, GSK will be responsible for certain milestone payments or royalties due to specified third parties with which the Company currently has agreements that relate to the XMT-2056 program.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The GSK Agreement will terminate at the end of the Option Period if GSK does not exercise its Option. In the event of the GSK Option Exercise, unless earlier terminated, the GSK Agreement will continue in effect until the date on </span></div></ix:continuation><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">13</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:6pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Notes to condensed consolidated financial statements (continued)</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div></div><ix:continuation id="idd1d511189cf48a6936ffcd9b82752c5" continuedAt="i51ee0847478e40b0806531054d2fa4de"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">which the royalty term and all payment obligations with respect to all Licensed Products in all countries have expired.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Accounting Analysis</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company assessed the GSK Agreement in accordance with ASC 606, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Revenue from Contracts with Customers</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, and concluded that the contract counterparty, GSK, is a customer. The Company identified the following two material performance obligations under the GSK Agreement: (i) development activities, including manufacturing, research and early clinical development activities, necessary to deliver the package of data, information and materials specified in the GSK agreement (the "Development Activities") and (ii) the Option to co-develop and to commercialize Licensed Products (the "License Option"). </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company concluded that the Development Activities are one distinct performance obligation, as the underlying activities are not distinguishable in the context of the contract and are inputs to an integrated development program that will generate data and information providing value to GSK in determining whether to exercise the Option. The License Option is considered a material right as the value of the license exceeds the Option Payment, and is therefore a distinct performance obligation.  </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In accordance with ASC 606, the Company determined that the initial transaction price under the GSK Agreement equals $<ix:nonFraction unitRef="usd" contextRef="i41c148fc858141c4bb995a59c9ea8257_I20220831" decimals="-5" name="us-gaap:ContractWithCustomerLiability" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfNTQ5NzU1ODU4NDQ2_f7a17805-32dd-4194-918c-3eb2ba9d9f18">100.0</ix:nonFraction>&#160;million, consisting of the upfront, non-refundable and non-creditable payment paid by GSK. None of the early clinical development milestones that may occur prior to the GSK Option Exercise have been included in the initial transaction price, as all milestone amounts were fully constrained. As part of its evaluation of the constraint, the Company considered numerous factors, including stage of development and the remaining risks associated with the development required to achieve the milestones, as well as whether the achievement of the milestones is outside the control of the Company or GSK. At the end of each subsequent reporting period, the Company will re-evaluate the probability of achievement and any related constraint and, if necessary, adjust its estimate of the overall transaction price. Any such adjustments will be recorded on a cumulative catch-up basis, which would affect the reported amount of revenues in the period of adjustment. The GSK Option payment is excluded from the initial transaction price at contract inception along with any future development, regulatory, and commercial milestone payments (including royalties) following the GSK Option Exercise. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Consistent with the allocation objective under ASC 606, the Company allocated the $<ix:nonFraction unitRef="usd" contextRef="i41c148fc858141c4bb995a59c9ea8257_I20220831" decimals="-5" name="us-gaap:ContractWithCustomerLiability" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfNTQ5NzU1ODU5NzA4_f7a17805-32dd-4194-918c-3eb2ba9d9f18">100.0</ix:nonFraction>&#160;million fixed upfront payment in the transaction price to the Development Activities and the License Option based on each performance obligation&#8217;s relative standalone selling price. The standalone selling price for the Development Activities was calculated using a cost-plus margin approach for the estimated pre-option development timeline. For the standalone selling price of the License Option, the Company utilized an income-based approach which included the following key assumptions: post-option development timeline and costs, revenue forecast, discount rates and probabilities of technical and regulatory success. </span></div><div style="margin-bottom:12pt"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company is recognizing revenue related to the Development Activities performance obligation over the estimated period of the pre-option development using a</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> proportional performance model as the underlying activities are performed. Th</span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">e C</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">ompany measures proportional performance based on the costs incurred relative to the total costs expected to be incurred. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company will defer revenue recognition related to the License Option. If the License Option is exercised and GSK obtains an exclusive license, the Company will recognize revenue as it fulfills its obligations under the GSK Agreement. If the Option is not exercised, the Company will recognize the entirety of the revenue in the period when the Option expires.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During the three and nine months ended September&#160;30, 2022, the Company recorded collaboration revenue of $<ix:nonFraction unitRef="usd" contextRef="i2cb3510793374dd3a9323aac84d16ace_D20220701-20220930" decimals="-5" name="us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfNTQ5NzU1ODYxMjc4_51cc5634-3e81-4237-911b-1a409820325b">0.7</ix:nonFraction>&#160;million related to its efforts under the GSK Agreement. As of September&#160;30, 2022, the Company had recorded $<ix:nonFraction unitRef="usd" contextRef="ic60a1cdb6bfb4b378d81116cfb73d0ff_I20220930" decimals="-5" name="us-gaap:ContractWithCustomerLiability" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfNTQ5NzU1ODYxMzg5_821a4cdb-7298-4fdf-aff7-63ad57d222ec">99.3</ix:nonFraction>&#160;million in deferred revenue related to the unsatisfied performance obligations under the GSK Agreement. This deferred revenue will be recognized over the remaining performance period and classified as current or noncurrent on the consolidated balance sheets.</span></div></ix:continuation><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">14</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:6pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Notes to condensed consolidated financial statements (continued)</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div></div><ix:continuation id="i51ee0847478e40b0806531054d2fa4de" continuedAt="i2fbb229ee0584803ae3ab17ec8614dd3"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Summary of Contract Assets and Liabilities</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company did <ix:nonFraction unitRef="usd" contextRef="ic60a1cdb6bfb4b378d81116cfb73d0ff_I20220930" decimals="INF" name="us-gaap:ContractWithCustomerAssetNet" format="ixt-sec:numwordsen" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfNTQ5NzU1ODg0Njkz_eb8af843-7873-43da-8357-d8881f87801d">no</ix:nonFraction>t record any contract assets as of September&#160;30, 2022 related to the GSK Agreement. <ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:ContractWithCustomerAssetAndLiabilityTableTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTA5OTUxMTY3NzQyOA_af6eee87-0c58-4870-97c1-5c02c63ef3d3" continuedAt="i772bd4ca5ee34694853e0b4bc310f6b4" escape="true">The following table presents changes in the balances of the Company's contract liabilities related to the GSK Agreement during the nine months ended September&#160;30, 2022:</ix:nonNumeric></span></div><ix:continuation id="i772bd4ca5ee34694853e0b4bc310f6b4" continuedAt="icd23844d28e84394a153074799836241"><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"><tr><td style="width:1.0%"></td><td style="width:45.127%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.741%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.602%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.741%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.602%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.741%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.602%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.744%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>Beginning<br/>of Period</span></td><td 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Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Nine months ended September 30, 2022</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Contract liabilities:</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New 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0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ied51df22b19e4c28ab4e567959fa772f_D20220101-20220930" decimals="-3" name="us-gaap:ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod" format="ixt:fixed-zero" scale="3" 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into a research collaboration and license agreement with Janssen Biotech Inc. ("Janssen" and such agreement, the "Janssen Agreement") focused on the research, development and commercialization of novel ADCs for <ix:nonFraction unitRef="target" contextRef="i3f30a2c3845549179c9686b9090173ac_I20220228" decimals="INF" name="mrsn:CollaborationArrangementsTargetsDesignatedNumber" format="ixt-sec:numwordsen" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMzAz_dea64463-0fdf-47c4-bc4c-931dd99531c4">three</ix:nonFraction> oncology targets by leveraging Mersana&#8217;s ADC expertise and Dolasynthen platform with Janssen&#8217;s proprietary antibodies. Upon execution of the Janssen Agreement, the Company received a non-refundable upfront payment of $<ix:nonFraction unitRef="usd" contextRef="i3078a073f1c4416b8ed30016a0b31b6d_D20220201-20220228" decimals="-5" name="us-gaap:ProceedsFromCollaborators" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfNTIz_2fbcc24b-5b00-4251-b231-69fc236ac54c">40.0</ix:nonFraction>&#160;million from Janssen. Pursuant to the Janssen Agreement, the Company granted Janssen two exclusive, non-transferrable, worldwide licenses - the Research License and the Commercialization License (together, the "Licenses"). The Research License provides Janssen, on a target-by-target basis, rights under the Company&#8217;s technology and the Company&#8217;s interest in the technology developed jointly through the collaboration solely to conduct Janssen&#8217;s activities under the research and Chemistry, Manufacturing and Controls ("CMC") plans with respect to each target. The Commercialization License is a royalty-bearing license granted on a target-by-target basis under the Company&#8217;s technology and the Company&#8217;s interest in the technology developed jointly through the collaboration to develop, manufacture, commercialize and otherwise exploit licensed ADCs and any licensed products containing licensed ADCs directed toward a target. Janssen may select up to <ix:nonFraction unitRef="target" contextRef="i3f30a2c3845549179c9686b9090173ac_I20220228" decimals="INF" name="mrsn:CollaborationArrangementsTargetsDesignatedNumber" format="ixt-sec:numwordsen" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTQ3MQ_dea64463-0fdf-47c4-bc4c-931dd99531c4">three</ix:nonFraction> targets and may substitute each target once prior to a substitution deadline. Janssen is not required to pay a fee for its first substitution right, but must pay a one-time fee for access to the subsequent substitution rights following its exercise of its second substitution right.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Pursuant to mutually agreed research and CMC plans, the Company will perform bioconjugation, production development, preclinical manufacturing, and certain related research and preclinical development activities, in order to progress the targets through investigational new drug application ("IND") submission for further development, manufacture and commercialization by Janssen. Janssen will have sole responsibility for IND-enabling studies, IND submission, clinical development, regulatory activities and commercialization of the licensed ADCs. Both the Company and Janssen will have equal representation on a Joint Research Committee and Joint Manufacturing Committee to oversee the research and CMC activities. The Company estimates that its activities under the research plans for the targets will be performed through 2024. </span></div></ix:continuation><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">15</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:6pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Notes to condensed consolidated financial statements (continued)</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div></div><ix:continuation id="i2fbb229ee0584803ae3ab17ec8614dd3" continuedAt="i347560076f7a42da9b109c6955a5cff9"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company's CMC activities will be compensated by Janssen at agreed upon rates. Assuming successful development and commercialization of all <ix:nonFraction unitRef="target" contextRef="i3f30a2c3845549179c9686b9090173ac_I20220228" decimals="INF" name="mrsn:CollaborationArrangementsTargetsDesignatedNumber" format="ixt-sec:numwordsen" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMjczNA_0b9b8025-5ead-4359-bb07-e264e1ff6421">three</ix:nonFraction> targets by Janssen, the Company could receive up to an additional $<ix:nonFraction unitRef="usd" contextRef="i091390c2b0024eb39a6620451db7eb87_I20220228" decimals="-6" name="mrsn:CollaborationArrangementsMaximumAggregateMilestones" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMjgwMw_2ff9ece5-7fc2-46d1-b041-192fcfffaab6">505</ix:nonFraction>&#160;million in development and regulatory milestones and $<ix:nonFraction unitRef="usd" contextRef="i2ac35fd32ea8455cb7b6b8a02363f475_I20220228" decimals="-6" name="mrsn:CollaborationArrangementsMaximumAggregateMilestones" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMjg1Mg_f371b345-af30-462b-8c44-f313e6fccf11">530</ix:nonFraction>&#160;million in sales milestones as well as tiered mid single-digit to low double-digit royalties on aggregate net sales of the ADC products. To date, the Company has not achieved any of the specified milestones. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Unless earlier terminated, the Janssen Agreement will expire upon the expiration of the last royalty term for a product under the Janssen Agreement. The Janssen Agreement contains customary provisions for termination by either party, including in the event of breach of the Janssen Agreement, subject to cure, by Janssen for convenience and by Mersana upon a challenge of the licensed patents, and customary provisions regarding the effects of termination. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Janssen may request that the Company perform clinical manufacturing services under a separate clinical supply agreement. Janssen may also request that the Company perform a technology transfer of bioconjugation and manufacturing process technology, at Janssen's cost, at an agreed upon rate.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Accounting Analysis</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company assessed the Janssen Agreement in accordance with ASC 606 and concluded that the contract counter party, Janssen, is a customer. The Company identified the following seven material performance obligations under the Janssen Agreement: (i) exclusive Licenses and research activities for each of the three designated targets, (ii) CMC activities for each of the three designated targets and (iii) the first target substitution right.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company concluded that the Licenses and research activities are one combined performance obligation for each target as the Licenses are not capable of being distinct from the research activities given their proprietary nature. The CMC activities are considered a distinct performance obligation for each target as the activities could be performed by a third-party provider. The first target substitution right is considered a material right as there is no option exercise fee and, as such, is a distinct performance obligation.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In accordance with ASC 606, the Company determined that the initial transaction price under the Janssen Agreement equals $<ix:nonFraction unitRef="usd" contextRef="i3078a073f1c4416b8ed30016a0b31b6d_D20220201-20220228" decimals="-5" name="us-gaap:ProceedsFromCollaborators" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfNDk2NA_9bf22b39-c3d5-4470-8f08-2c398e7bc26b">40.0</ix:nonFraction>&#160;million, consisting of the upfront, non-refundable and non-creditable payment. None of the development and the regulatory milestones have been included in the transaction price, as all milestone amounts were fully constrained. As part of its evaluation of the constraint, the Company considered numerous factors, including stage of development and the remaining risks associated with the development required to achieve the milestones, as well as whether the achievement of the milestones is outside the control of the Company or Janssen. Any consideration related to sales-based milestones (including royalties) will be recognized when the related sales occur as such milestones were determined to relate predominantly to the license granted to Janssen and therefore have also been excluded from the transaction price. At the end of each subsequent reporting period, the Company will re-evaluate the probability of achievement of each milestone and any related constraint and, if necessary, adjust its estimate of the overall transaction price. Any such adjustments are recorded on a cumulative catch-up basis, which would affect the reported amount of revenues in the period of adjustment.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company determined that the consideration for CMC activities represents variable consideration. The Company has not included potential cost reimbursements within the transaction price as no CMC activities for any of the three targets have been initiated. The Company elected to apply the Right to Invoice practical expedient under ASC 606. As such, the Company will recognize revenue related to the CMC activities when the services are performed.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Consistent with the allocation objective under ASC 606, the Company allocated the $<ix:nonFraction unitRef="usd" contextRef="i3078a073f1c4416b8ed30016a0b31b6d_D20220201-20220228" decimals="-5" name="us-gaap:ProceedsFromCollaborators" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfNjY4NA_fe4aaf8a-de81-48de-b6de-8e0a5f25267e">40.0</ix:nonFraction>&#160;million fixed upfront payment in the transaction price to the Licenses and research activities and first substitution right based on each performance obligation&#8217;s relative standalone selling price. Each of the standalone selling prices for the Licenses and research activities and for the first substitution right were estimated utilizing an income approach, along with the likelihood of exercise for the substitution right and included the following key assumptions: the development timeline, revenue forecast, discount rate and probabilities of technical and regulatory success. </span></div></ix:continuation><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">16</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:6pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Notes to condensed consolidated financial statements (continued)</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div></div><ix:continuation id="i347560076f7a42da9b109c6955a5cff9" continuedAt="i995f47f63d3e46e8bd0498cc74ffc256"><div style="margin-bottom:12pt"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company is recognizing revenue related to the Licenses and research services performance obligation over the estimated period of the research services using a proportional performance model. The Company measures proportional performance based on the costs incurred relative to the total costs expected to be incurred. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company will recognize revenue related to the first target substitution right over time in congruence with the Licenses and research activities, upon the exercise of the option. If the first target substitution option is not exercised, the Company will recognize the entirety of the revenue in the period when the option expires.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During the three and nine months ended September&#160;30, 2022, the Company recorded collaboration revenue of $<ix:nonFraction unitRef="usd" contextRef="i8306e3e5927d4299a6eca612ff388e43_D20220701-20220930" decimals="-5" name="us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfNzk5NQ_85b3c6f9-e2af-4347-bced-dd64644ebea4">4.9</ix:nonFraction>&#160;million and $<ix:nonFraction unitRef="usd" contextRef="i038eb6f7ec2749b6b307d4ab3af11feb_D20220101-20220930" decimals="-5" name="us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfODAwMg_ef5370c6-8e41-4bdb-a7aa-4db85abb7b72">10.9</ix:nonFraction>&#160;million, respectively, related to its efforts under the Janssen Agreement. As of September&#160;30, 2022, the Company had recorded $<ix:nonFraction unitRef="usd" contextRef="iabd44c3a938444d586d6fe237ed44751_I20220930" decimals="-5" name="us-gaap:ContractWithCustomerLiability" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfODEwNw_a8cad8aa-c0d4-4d1b-ac38-84061076a1a7">29.1</ix:nonFraction>&#160;million in deferred revenue related to the Janssen Agreement that will be recognized over the remaining performance period and classified as current or noncurrent on the consolidated balance sheets based upon the expected timing of satisfaction of respective performance obligations. The aggregate amount of the transaction price allocated to unsatisfied performance obligations was $<ix:nonFraction unitRef="usd" contextRef="iabd44c3a938444d586d6fe237ed44751_I20220930" decimals="-5" name="us-gaap:RevenueRemainingPerformanceObligation" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfODQ5OA_4b76b0d4-265e-4821-ba6b-bca7d947742d">29.1</ix:nonFraction>&#160;million as of September&#160;30, 2022, which is expected to be recognized over the period the associated research activities are performed for each target.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Summary of Contract Assets and Liabilities</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company did <ix:nonFraction unitRef="usd" contextRef="iabd44c3a938444d586d6fe237ed44751_I20220930" decimals="INF" name="us-gaap:ContractWithCustomerAssetNet" format="ixt:fixed-zero" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfODY4Nw_08c31cf1-dbf8-446f-9c99-c320b7db4315">no</ix:nonFraction>t record any contract assets as of September&#160;30, 2022 related to the Janssen Agreement. <ix:continuation id="icd23844d28e84394a153074799836241" continuedAt="i5824e51dde3f4f1b9e8cbd0faa96022f">The following table presents changes in the balances of the Company's contract liabilities related to the Janssen Agreement during the nine months ended September&#160;30, 2022:</ix:continuation></span></div><ix:continuation id="i5824e51dde3f4f1b9e8cbd0faa96022f" continuedAt="if753432c62e547788040468c9d567ac9"><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"><tr><td style="width:1.0%"></td><td style="width:45.127%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.741%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.602%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.741%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.602%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.741%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.602%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.744%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>Beginning<br/>of Period</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Additions</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Deductions</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>End of Period</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Nine months ended September 30, 2022</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Contract liabilities:</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Deferred revenue</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New 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style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i262b5e7f5fc048649fc7abeab690a706_D20220101-20220930" decimals="-3" name="mrsn:ContractWithCustomerLiabilityDecrease" format="ixt:num-dot-decimal" scale="3" 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id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RhYmxlOjI1ZGMyN2U5ZDc2NTRmZmFhZWI5NzNkMjUzYzQyZDQ4L3RhYmxlcmFuZ2U6MjVkYzI3ZTlkNzY1NGZmYWFlYjk3M2QyNTNjNDJkNDhfNC0zLTEtMS00NzkwMQ_fb61f97f-0116-43f1-826c-46750fd5390e">&#8212;</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr></table></div></ix:continuation><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Merck KGaA</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In June 2014, the Company entered into a collaboration and commercial license agreement with Merck KGaA (the "Merck KGaA Agreement"). Upon the execution of the Merck KGaA Agreement, Merck KGaA paid the Company a non-refundable technology access fee of $<ix:nonFraction unitRef="usd" contextRef="ie459a43465c9426dae3709ab4ccf18fc_D20140601-20140630" decimals="-3" name="us-gaap:ProceedsFromCollaborators" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfOTM3OA_9d2c8050-56a3-4fa8-a339-3a6949accb8f">12.0</ix:nonFraction> million for the right to develop ADCs directed to <ix:nonFraction unitRef="target" contextRef="icaab4549b98641968ab639cd2ef45bb8_I20140630" decimals="INF" name="mrsn:CollaborationArrangementsTargetsDesignatedNumber" format="ixt-sec:numwordsen" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfOTQyMw_3f256e01-9885-4b5b-a302-adf71e702837">six</ix:nonFraction> exclusive targets over a specified period of time. <ix:nonFraction unitRef="usd" contextRef="icaab4549b98641968ab639cd2ef45bb8_I20140630" decimals="INF" name="mrsn:CollaborationArrangementsAdditionalPaymentToObtainDevelopmentAndCommercialLicense" format="ixt:fixed-zero" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfOTQ3Nw_c70a28fd-2fd6-482e-b615-ca845114ca3f">No</ix:nonFraction> additional fees are due when a target is designated and the commercial license to the target is granted. Merck KGaA will be responsible for the product development and marketing of any products resulting from this collaboration.&#160;</span></div></ix:continuation><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">17</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:6pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Notes to condensed consolidated financial statements (continued)</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div></div><ix:continuation id="i995f47f63d3e46e8bd0498cc74ffc256" continuedAt="i26b0f41596524196a08c5419b8e3a979"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Under the terms of the Merck KGaA Agreement, the Company and Merck KGaA develop research plans to evaluate Merck KGaA's antibodies as ADCs incorporating the Company's technology. The Company receives reimbursement for its efforts under the research plans. The goal of the research plans is to provide Merck KGaA with sufficient information to formally nominate a development candidate and begin IND-enabling studies.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">All <ix:nonFraction unitRef="target" contextRef="i6de9b013789d4d31ab3d2cbc4fbdd2d7_I20171231" decimals="INF" name="mrsn:CollaborationArrangementsTargetsDesignatedNumber" format="ixt-sec:numwordsen" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTAxMzE_6858e313-0bbd-4314-b025-38ec39c2eb46">six</ix:nonFraction> targets were designated prior to 2018. The next potential milestone payment that the Company is eligible to receive is a development milestone of $<ix:nonFraction unitRef="usd" contextRef="i975593b2ffe64d8a9b7e74a3ffe54db4_I20220930" decimals="-3" name="mrsn:CollaborationArrangementsDevelopmentMilestonesPaymentReceivableNextMilestone" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTAyODA_f485fd8d-5c7f-44fb-8c52-2b950ed97aaa">0.5</ix:nonFraction> million on Merck KGaA&#8217;s designation of a preclinical development candidate for a target. Revenue will be recognized when achievement of the milestone is considered probable.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In May 2018, the Company entered into a supply agreement with Merck KGaA (the "Merck KGaA Supply Agreement"). Under the terms of the Merck KGaA Supply Agreement, the Company will provide Merck KGaA preclinical non-good manufacturing practice ("non-GMP") ADC drug substance and clinical good manufacturing practice ("GMP") drug substance for use in clinical trials associated with one of the antibodies designated under the Merck KGaA Agreement. The Company receives fees for its efforts under the Merck KGaA Supply Agreement and reimbursement equal to the supply cost. The Company may also enter into future supply agreements to provide clinical supply material should Merck KGaA pursue clinical development of any other candidates nominated under the Merck KGaA Agreement.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Accounting Analysis</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company concluded that Merck KGaA is a customer and accounted for the Merck KGaA Agreement in accordance with ASC 606. The Company identified the following performance obligations under the Merck KGaA Agreement: (i) exclusive license and research services for <ix:nonFraction unitRef="target" contextRef="i975593b2ffe64d8a9b7e74a3ffe54db4_I20220930" decimals="INF" name="mrsn:CollaborationArrangementsTargetsDesignatedNumber" format="ixt-sec:numwordsen" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTE0NzE_c0cf015b-71a9-4afb-a05e-a06610401087">six</ix:nonFraction> designated targets, (ii) rights to future technological improvements and (iii) participation of project team leaders and providing joint research committee services.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company is recognizing revenue related to the exclusive license and research and development services performance obligations over the estimated period of the research and development services using a proportional performance model. The Company measures proportional performance based on the costs incurred relative to the total costs expected to be incurred. To the extent that the Company receives fees for the research services as they are performed, these amounts are recorded as deferred revenue. Revenue related to future technological improvements and joint research committee services will be recognized ratably over the respective performance period (which in the case of the joint research committee services approximate the time and cost incurred each period), which are <ix:nonNumeric contextRef="ic6cf951f45004614b65db548d1abdef9_I20220930" name="us-gaap:RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1" format="ixt-sec:duryear" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTI0MjY_c52a1ea3-3737-4cc0-bf76-ec38455a6675">10</ix:nonNumeric> and <ix:nonNumeric contextRef="i165219fd998342908977d41fd9ccbc0f_I20220930" name="us-gaap:RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1" format="ixt-sec:duryear" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTI0MzM_0243539c-71b6-43cd-9de3-f045493867db">5</ix:nonNumeric> years, respectively.&#160;The Company is continuing to reassess the estimated remaining term at each subsequent reporting period.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of September&#160;30, 2022, the Company had completed its research service obligations associated with <ix:nonFraction unitRef="target" contextRef="iac4bd3fcfda84a1698b2870fe6dc0708_D20220101-20220930" decimals="INF" name="mrsn:CollaborationArrangementsTargetsDesignatedPerformanceObligationsSatisfiedNumber" format="ixt-sec:numwordsen" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTI2NDA_edc44460-1533-472c-9b11-b1e67c3f2d9d">four</ix:nonFraction> of the <ix:nonFraction unitRef="target" contextRef="i975593b2ffe64d8a9b7e74a3ffe54db4_I20220930" decimals="INF" name="mrsn:CollaborationArrangementsTargetsDesignatedNumber" format="ixt-sec:numwordsen" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTI2NTA_d334bb19-dd70-42d0-8372-030c751018c0">six</ix:nonFraction> designated targets. The Company did <ix:nonFraction unitRef="usd" contextRef="i7506c2de65624fd185df2b7d24316c7d_D20220701-20220930" decimals="-3" name="us-gaap:ResearchAndDevelopmentExpense" format="ixt:fixed-zero" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTI2ODk_385490ea-4c35-4266-aa6a-cf8eeea3c85a"><ix:nonFraction unitRef="usd" contextRef="ie18dabb8c6fa4b74a872c383dacbff36_D20220101-20220930" decimals="-3" name="us-gaap:ResearchAndDevelopmentExpense" format="ixt:fixed-zero" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTI2ODk_5d70ecbf-7faf-4739-b7cf-fbef56d84c27"><ix:nonFraction unitRef="usd" contextRef="i7962f339ae14410dbb67e1507356af47_D20210701-20210930" decimals="-3" name="us-gaap:ResearchAndDevelopmentExpense" format="ixt:fixed-zero" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTI2ODk_8650106d-dfa4-4862-8823-b3bbf78ae75d"><ix:nonFraction unitRef="usd" contextRef="i8eaf942f5519471ab8f94dd1b012aaa9_D20210101-20210930" decimals="-3" name="us-gaap:ResearchAndDevelopmentExpense" format="ixt:fixed-zero" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTI2ODk_92ec113e-257c-4fa7-aba1-66e890d689c8">no</ix:nonFraction></ix:nonFraction></ix:nonFraction></ix:nonFraction>t recognize any corresponding research and development expense related to the Merck KGaA Supply Agreement during the three and nine months ended September&#160;30, 2022 and 2021. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of September&#160;30, 2022 and December&#160;31, 2021, the Company had $<ix:nonFraction unitRef="usd" contextRef="i8b4071b167764584b9d4312ab9ff046a_I20220930" decimals="-5" name="us-gaap:ContractWithCustomerLiability" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTI4Njk_6cc06363-9cc1-4142-9b4b-92ce15f1eb0b"><ix:nonFraction unitRef="usd" contextRef="i204073824e6c41b7a7881a5419019a0a_I20211231" decimals="-5" name="us-gaap:ContractWithCustomerLiability" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTI4Njk_fc4acc8d-cc2d-4535-8e80-7e93e7f2833f">3.9</ix:nonFraction></ix:nonFraction> million in deferred revenue related to the Merck KGaA Agreement and Merck KGaA Supply Agreement. Such amounts will be recognized over the remaining performance period. </span></div></ix:continuation><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">18</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:6pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Notes to condensed consolidated financial statements (continued)</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div></div><ix:continuation id="i26b0f41596524196a08c5419b8e3a979"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Summary of Contract Assets and Liabilities</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company did not record any contract assets as of September&#160;30, 2022 and December&#160;31, 2021. <ix:continuation id="if753432c62e547788040468c9d567ac9" continuedAt="ie21e6ec2de4d4ce88d7bf8f833867ee7">The following table presents changes in the balances of the Company's contract liabilities related to the Merck KGaA Agreement and Merck KGaA Supply Agreement during the nine months ended September&#160;30, 2022 and 2021:</ix:continuation></span></div><ix:continuation id="ie21e6ec2de4d4ce88d7bf8f833867ee7"><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"><tr><td style="width:1.0%"></td><td style="width:45.127%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.741%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.602%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.741%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.602%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.741%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.602%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.744%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>Beginning<br/>of Period</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Additions</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Deductions</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>End of Period</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Nine months ended September 30, 2022</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Contract liabilities:</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Deferred revenue</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i204073824e6c41b7a7881a5419019a0a_I20211231" decimals="-3" name="us-gaap:ContractWithCustomerLiability" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RhYmxlOmNlYmQ4N2NlZGU5YzRhM2Q5M2E5OGI1OGMyYWU1OWU0L3RhYmxlcmFuZ2U6Y2ViZDg3Y2VkZTljNGEzZDkzYTk4YjU4YzJhZTU5ZTRfNC0xLTEtMS00NzkwMQ_92596ce4-10c6-44e1-aba4-c1c00d58a472">3,944</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ibbc12bcd498f40f0b24208edf4972957_D20220101-20220930" decimals="-3" name="mrsn:ContractWithCustomerLiabilityIncrease" format="ixt:fixed-zero" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RhYmxlOmNlYmQ4N2NlZGU5YzRhM2Q5M2E5OGI1OGMyYWU1OWU0L3RhYmxlcmFuZ2U6Y2ViZDg3Y2VkZTljNGEzZDkzYTk4YjU4YzJhZTU5ZTRfNC0zLTEtMS00NzkwMQ_b84e2092-048c-4846-850c-31f18c7cd5e8">&#8212;</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ibbc12bcd498f40f0b24208edf4972957_D20220101-20220930" decimals="-3" name="mrsn:ContractWithCustomerLiabilityDecrease" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RhYmxlOmNlYmQ4N2NlZGU5YzRhM2Q5M2E5OGI1OGMyYWU1OWU0L3RhYmxlcmFuZ2U6Y2ViZDg3Y2VkZTljNGEzZDkzYTk4YjU4YzJhZTU5ZTRfNC01LTEtMS00NzkwMQ_1c3684f8-14cf-4506-9159-630f0770f563">32</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i8b4071b167764584b9d4312ab9ff046a_I20220930" decimals="-3" name="us-gaap:ContractWithCustomerLiability" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RhYmxlOmNlYmQ4N2NlZGU5YzRhM2Q5M2E5OGI1OGMyYWU1OWU0L3RhYmxlcmFuZ2U6Y2ViZDg3Y2VkZTljNGEzZDkzYTk4YjU4YzJhZTU5ZTRfNC03LTEtMS00NzkwMQ_dbeaa9d7-d691-41e5-a450-c5286020abbd">3,912</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"><tr><td style="width:1.0%"></td><td style="width:45.127%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.741%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.602%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.741%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.602%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.741%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.602%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.744%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>Beginning<br/>of Period</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Additions</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Deductions</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>End of Period</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Nine months ended September 30, 2021</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Contract liabilities:</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Deferred revenue</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i91d69a12b73844c39cb77523d579ed51_I20201231" decimals="-3" name="us-gaap:ContractWithCustomerLiability" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RhYmxlOmEyZTgwNTQxNWNlMDQ0NWM4ZmQ5ZjE5Zjk1ZjEzZjIzL3RhYmxlcmFuZ2U6YTJlODA1NDE1Y2UwNDQ1YzhmZDlmMTlmOTVmMTNmMjNfNC0xLTEtMS00NzkwMQ_29315947-e99f-4627-9bff-87d249b9de8b">3,987</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i121f784f2e244ecf84892b80eaab96dc_D20210101-20210930" decimals="-3" name="mrsn:ContractWithCustomerLiabilityIncrease" format="ixt:fixed-zero" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RhYmxlOmEyZTgwNTQxNWNlMDQ0NWM4ZmQ5ZjE5Zjk1ZjEzZjIzL3RhYmxlcmFuZ2U6YTJlODA1NDE1Y2UwNDQ1YzhmZDlmMTlmOTVmMTNmMjNfNC0zLTEtMS00NzkwMQ_65a61a80-63f0-4b56-9a09-1701e114bd62">&#8212;</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i121f784f2e244ecf84892b80eaab96dc_D20210101-20210930" decimals="-3" name="mrsn:ContractWithCustomerLiabilityDecrease" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RhYmxlOmEyZTgwNTQxNWNlMDQ0NWM4ZmQ5ZjE5Zjk1ZjEzZjIzL3RhYmxlcmFuZ2U6YTJlODA1NDE1Y2UwNDQ1YzhmZDlmMTlmOTVmMTNmMjNfNC01LTEtMS00NzkwMQ_707f192d-5819-449e-87fa-bfe7946dfbe4">32</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i2eb27011e3e644d09c5aadfbbfd155eb_I20210930" decimals="-3" name="us-gaap:ContractWithCustomerLiability" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RhYmxlOmEyZTgwNTQxNWNlMDQ0NWM4ZmQ5ZjE5Zjk1ZjEzZjIzL3RhYmxlcmFuZ2U6YTJlODA1NDE1Y2UwNDQ1YzhmZDlmMTlmOTVmMTNmMjNfNC03LTEtMS00NzkwMQ_0b1e0e79-f509-4317-a524-f73d8be407f8">3,955</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During the three and nine months ended September&#160;30, 2022 and 2021, the Company recognized the following revenues related to the Merck KGaA Agreement and Merck KGaA Supply Agreement as a result of changes in the contract liability balances in the respective periods:</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:45.214%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.720%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.601%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.720%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.601%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.720%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.601%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.723%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three Months Ended<br/>September 30,</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended<br/>September 30,</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Revenue recognized in the period from:</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Amounts included in the contract liability at the beginning of the period</span></td><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i80d9add78b944f65bb174a67e19c23b4_D20220701-20220930" decimals="-3" name="us-gaap:ContractWithCustomerLiabilityRevenueRecognized" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RhYmxlOjFkZTg5ZDBhYjE4YTRiNTJiYTM0MjBjZjgxOTAxNDU3L3RhYmxlcmFuZ2U6MWRlODlkMGFiMThhNGI1MmJhMzQyMGNmODE5MDE0NTdfMy0xLTEtMS00NzkwMQ_72a9d3a7-4b8e-43b0-8ffc-c8832ea268ff">11</ix:nonFraction>&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i2c9cf9adde864abb84ae5ae07d437a05_D20210701-20210930" decimals="-3" name="us-gaap:ContractWithCustomerLiabilityRevenueRecognized" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RhYmxlOjFkZTg5ZDBhYjE4YTRiNTJiYTM0MjBjZjgxOTAxNDU3L3RhYmxlcmFuZ2U6MWRlODlkMGFiMThhNGI1MmJhMzQyMGNmODE5MDE0NTdfMy0zLTEtMS00NzkwMQ_a8fd1199-d885-4734-a4d7-199c669759c7">11</ix:nonFraction>&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="padding:0 1pt"></td><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ibbc12bcd498f40f0b24208edf4972957_D20220101-20220930" decimals="-3" 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contextRef="i121f784f2e244ecf84892b80eaab96dc_D20210101-20210930" decimals="-3" name="us-gaap:ContractWithCustomerLiabilityRevenueRecognized" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RhYmxlOjFkZTg5ZDBhYjE4YTRiNTJiYTM0MjBjZjgxOTAxNDU3L3RhYmxlcmFuZ2U6MWRlODlkMGFiMThhNGI1MmJhMzQyMGNmODE5MDE0NTdfMy03LTEtMS00NzkwMQ_5d92f481-6d45-4436-b37a-977795a91818">32</ix:nonFraction>&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Performance obligations satisfied in previous periods</span></td><td style="background-color:#cceeff;padding:2px 0 2px 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style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i2c9cf9adde864abb84ae5ae07d437a05_D20210701-20210930" decimals="-3" name="us-gaap:ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod" format="ixt:fixed-zero" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RhYmxlOjFkZTg5ZDBhYjE4YTRiNTJiYTM0MjBjZjgxOTAxNDU3L3RhYmxlcmFuZ2U6MWRlODlkMGFiMThhNGI1MmJhMzQyMGNmODE5MDE0NTdfNC0zLTEtMS00NzkwMQ_881ad3a1-a302-4ab0-b163-cb509d748a48">&#8212;</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ibbc12bcd498f40f0b24208edf4972957_D20220101-20220930" decimals="-3" name="us-gaap:ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod" format="ixt:fixed-zero" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RhYmxlOjFkZTg5ZDBhYjE4YTRiNTJiYTM0MjBjZjgxOTAxNDU3L3RhYmxlcmFuZ2U6MWRlODlkMGFiMThhNGI1MmJhMzQyMGNmODE5MDE0NTdfNC01LTEtMS00NzkwMQ_ae31f6cb-df8b-4a80-8c22-3f59e73ad34c">&#8212;</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i121f784f2e244ecf84892b80eaab96dc_D20210101-20210930" decimals="-3" name="us-gaap:ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod" format="ixt:fixed-zero" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RhYmxlOjFkZTg5ZDBhYjE4YTRiNTJiYTM0MjBjZjgxOTAxNDU3L3RhYmxlcmFuZ2U6MWRlODlkMGFiMThhNGI1MmJhMzQyMGNmODE5MDE0NTdfNC03LTEtMS00NzkwMQ_2205a825-e28d-4177-aaa8-ec9b6200fcf8">&#8212;</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr></table></div></ix:continuation><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Other Revenue</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company has provided limited services for a collaboration partner, Asana BioSciences, LLC ("Asana Biosciences"). During the nine months ended September&#160;30, 2022, the Company recognized revenue of $<ix:nonFraction unitRef="usd" contextRef="i7ff729b14ab84896b5c5c2f2efd6b195_D20220101-20220930" decimals="-5" name="us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTM3NzY_49876e8b-0db6-4c8d-951b-773923e60b3b">0.3</ix:nonFraction> million related to these services and did <ix:nonFraction unitRef="usd" contextRef="i422f72ee6e0942ad868ecb604c30840f_D20210101-20210930" decimals="-5" name="us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax" format="ixt:fixed-zero" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTM4MTM_3de7180f-ba7c-4ce7-9104-b9993768d168"><ix:nonFraction unitRef="usd" contextRef="ib78af5b07bb040589c8528d146b666e1_D20210701-20210930" decimals="-5" name="us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax" format="ixt:fixed-zero" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTM4MTM_54404ab4-b1e9-434e-a8da-21a7290b26cb"><ix:nonFraction unitRef="usd" contextRef="ic5b4de245bd747969f60f76219e0ff70_D20220701-20220930" decimals="-5" name="us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax" format="ixt:fixed-zero" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTM4MTM_6e8184b1-1a51-4b6c-8916-e4cffa5ecf86">not</ix:nonFraction></ix:nonFraction></ix:nonFraction> recognize revenue related to these services during the three months ended September 30, 2022 or during the three and nine months ended September&#160;30, 2021. The next potential milestone the Company is eligible to receive is $<ix:nonFraction unitRef="usd" contextRef="id7cc820851b7474fa9192602b1e5ecf8_I20220930" decimals="-5" name="mrsn:CollaborationArrangementsMilestonePaymentReceivableNextMilestone" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTQwMDU_cdb987ac-4793-4ef7-8598-3ca3bbbef833">2.5</ix:nonFraction> million upon dosing the fifth patient in a Phase 1 clinical trial by Asana BioSciences. While the first patient was dosed in April 2022, as of September&#160;30, 2022, the Company considers this next milestone to be fully constrained as there is considerable judgment involved in determining whether it is probable that a significant revenue reversal would occur. As part of its evaluation of the constraint, the Company considered numerous factors, including the fact that achievement of the milestone is outside the control of the Company and there is a high level of uncertainty in achieving this milestone, as the collaboration partner continues to evaluate its candidate in the Phase 1 trial. The Company reevaluates the probability of achievement of a milestone subject to constraint at each reporting period and as uncertain events are resolved or other changes in circumstances occur.</span></div></ix:continuation><div style="margin-bottom:12pt"><span><br/></span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">19</span></div></div></div><div id="i036c42b7cd7942de8867eb61947b1b1c_43"></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:6pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Notes to condensed consolidated financial statements (continued)</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">4.&#160;<ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:FairValueMeasurementInputsDisclosureTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180My9mcmFnOjliYzRkYjlmZjRmNDQyMTY5ZGM3NmY3ZTE3MzNkNzQ2L3RleHRyZWdpb246OWJjNGRiOWZmNGY0NDIxNjlkYzc2ZjdlMTczM2Q3NDZfMTUwOA_a6e1c0b5-79be-4946-9711-a84e43dd446d" continuedAt="iac330652ee9c4e6ab6080189ed9df52f" escape="true">Fair value measurements</ix:nonNumeric></span></div><ix:continuation id="iac330652ee9c4e6ab6080189ed9df52f"><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:FairValueAssetsMeasuredOnRecurringBasisTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180My9mcmFnOjliYzRkYjlmZjRmNDQyMTY5ZGM3NmY3ZTE3MzNkNzQ2L3RleHRyZWdpb246OWJjNGRiOWZmNGY0NDIxNjlkYzc2ZjdlMTczM2Q3NDZfMTUwNg_9db265ba-48a6-4b04-917a-68739056037f" escape="true"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table presents information about the Company's assets measured at fair value on a recurring basis and indicates the level within fair value hierarchy of the valuation techniques utilized to determine such value. The Company had <ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-6" name="us-gaap:DebtSecuritiesAvailableForSaleExcludingAccruedInterest" format="ixt:fixed-zero" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180My9mcmFnOjliYzRkYjlmZjRmNDQyMTY5ZGM3NmY3ZTE3MzNkNzQ2L3RleHRyZWdpb246OWJjNGRiOWZmNGY0NDIxNjlkYzc2ZjdlMTczM2Q3NDZfMjc0_efcacd07-e3b0-4c49-877e-bedb98daff50">no</ix:nonFraction> marketable securities as of December&#160;31, 2021.</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:98.076%"><tr><td style="width:1.0%"></td><td style="width:46.612%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.971%"></td><td style="width:0.1%"></td><td colspan="3" style="display:none"></td><td style="width:1.0%"></td><td style="width:11.971%"></td><td style="width:0.1%"></td><td colspan="3" style="display:none"></td><td style="width:1.0%"></td><td style="width:11.971%"></td><td style="width:0.1%"></td><td colspan="3" style="display:none"></td><td style="width:1.0%"></td><td style="width:11.975%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="12" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30, 2022</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Total</span></td><td colspan="3" style="display:none"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Quoted&#160;Prices<br/>in&#160;Active<br/>Markets<br/>(Level&#160;1)</span></td><td colspan="3" style="display:none"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Significant<br/>Other<br/>Observable<br/>Inputs<br/>(Level&#160;2)</span></td><td colspan="3" style="display:none"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Significant<br/>Unobservable<br/>Inputs<br/>(Level&#160;3)</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Cash equivalents</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="display:none"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="display:none"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="display:none"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 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style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr></table></div></ix:nonNumeric><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The money market funds noted above are included in cash and cash equivalents in the accompanying condensed consolidated balance sheets. There were no changes in valuation techniques or transfers between fair value measurement levels during the nine months ended September&#160;30, 2022.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Marketable securities classified as Level 1 within the valuation hierarchy generally consists of U.S. treasury securities, as the fair value is readily determinable based on active daily markets for identical securities. Marketable securities classified as Level 2 within the valuation hierarchy generally consists of U.S. government agency securities, as the fair value is readily determinable based on active daily markets for similar securities and other observable inputs. The Company estimates the fair values of marketable securities by taking into consideration valuations obtained from third-party pricing sources. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The carrying amounts reflected in the consolidated balance sheets for</span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> prepaid expenses and other current assets, accounts payable and accrued expenses approximate their fair values due to their short-term nature.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of September&#160;30, 2022 and December&#160;31, 2021, the carrying value of the Company&#8217;s outstanding borrowing under the New Credit Facility (as defined in Note 7) approximated fair value (a Level 2 fair value measurement), reflecting interest rates currently available to the Company. The New Credit Facility is discussed in more detail in Note 7, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Debt</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">.</span></div></ix:continuation><div style="margin-bottom:12pt"><span><br/></span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">20</span></div></div></div><div id="i036c42b7cd7942de8867eb61947b1b1c_46"></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:6pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Notes to condensed consolidated financial statements (continued)</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">5. <ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:CashCashEquivalentsAndMarketableSecuritiesTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RleHRyZWdpb246MmM3MjFhYzcxY2E0NDE4MThmMmNlYzVhNDFlZDExOWVfMTMxNw_6a82be05-8996-47cf-8459-e07d09d93018" continuedAt="i87bc0a53b63e433294572ba006e43c12" escape="true">Cash, cash equivalents, and short-term marketable securities</ix:nonNumeric></span></div><ix:continuation id="i87bc0a53b63e433294572ba006e43c12" continuedAt="icff385f87323469ca2d9e4f5834958a1"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Cash and cash 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style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.741%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.602%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.741%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.602%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.741%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.602%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.744%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended<br/>September 30, 2022</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended<br/>September 30, 2021</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Beginning<br/>of period</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">End<br/>of period</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Beginning<br/>of period</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">End<br/>of period</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Cash and cash equivalents</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:CashAndCashEquivalentsAtCarryingValue" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjY5OGFiNzI0YTgzODRhOWI5YWI3NjNmMzYzOTJmM2E5L3RhYmxlcmFuZ2U6Njk4YWI3MjRhODM4NGE5YjlhYjc2M2YzNjM5MmYzYTlfMi0xLTEtMS00NzkwMQ_5a0a6753-aa40-4020-bf79-653ec5021a45">177,947</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:CashAndCashEquivalentsAtCarryingValue" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjY5OGFiNzI0YTgzODRhOWI5YWI3NjNmMzYzOTJmM2E5L3RhYmxlcmFuZ2U6Njk4YWI3MjRhODM4NGE5YjlhYjc2M2YzNjM5MmYzYTlfMi0zLTEtMS00NzkwMQ_72729160-1aa2-4eb4-9dba-94f6eeb33bd1">184,082</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i0b0aa2c04c1d468994df6042db5b45a7_I20201231" decimals="-3" name="us-gaap:CashAndCashEquivalentsAtCarryingValue" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjY5OGFiNzI0YTgzODRhOWI5YWI3NjNmMzYzOTJmM2E5L3RhYmxlcmFuZ2U6Njk4YWI3MjRhODM4NGE5YjlhYjc2M2YzNjM5MmYzYTlfMi01LTEtMS00NzkwMQ_84a464b3-caab-42dd-9590-bf2cadc18638">255,094</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="iaca4d8e8d21f4aaba26f31a7d752612f_I20210930" decimals="-3" name="us-gaap:CashAndCashEquivalentsAtCarryingValue" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjY5OGFiNzI0YTgzODRhOWI5YWI3NjNmMzYzOTJmM2E5L3RhYmxlcmFuZ2U6Njk4YWI3MjRhODM4NGE5YjlhYjc2M2YzNjM5MmYzYTlfMi03LTEtMS00NzkwMQ_aae5d505-aa14-44c7-a2a3-9cd40e13e4bb">191,707</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Restricted cash included in other assets, noncurrent</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:RestrictedCashNoncurrent" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjY5OGFiNzI0YTgzODRhOWI5YWI3NjNmMzYzOTJmM2E5L3RhYmxlcmFuZ2U6Njk4YWI3MjRhODM4NGE5YjlhYjc2M2YzNjM5MmYzYTlfMy0xLTEtMS00NzkwMQ_a8824e03-4aba-4be4-aae9-837fff30fe0a">478</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:RestrictedCashNoncurrent" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjY5OGFiNzI0YTgzODRhOWI5YWI3NjNmMzYzOTJmM2E5L3RhYmxlcmFuZ2U6Njk4YWI3MjRhODM4NGE5YjlhYjc2M2YzNjM5MmYzYTlfMy0zLTEtMS00NzkwMQ_a8b35803-fb5f-4ace-a3d8-512bd5443af8">478</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i0b0aa2c04c1d468994df6042db5b45a7_I20201231" decimals="-3" name="us-gaap:RestrictedCashNoncurrent" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjY5OGFiNzI0YTgzODRhOWI5YWI3NjNmMzYzOTJmM2E5L3RhYmxlcmFuZ2U6Njk4YWI3MjRhODM4NGE5YjlhYjc2M2YzNjM5MmYzYTlfMy01LTEtMS00NzkwMQ_c5632f30-e2d6-4026-9582-34d806251268">321</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="iaca4d8e8d21f4aaba26f31a7d752612f_I20210930" decimals="-3" name="us-gaap:RestrictedCashNoncurrent" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjY5OGFiNzI0YTgzODRhOWI5YWI3NjNmMzYzOTJmM2E5L3RhYmxlcmFuZ2U6Njk4YWI3MjRhODM4NGE5YjlhYjc2M2YzNjM5MmYzYTlfMy03LTEtMS00NzkwMQ_bc734a06-8221-4596-81f1-49024306d6b3">478</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total cash, cash equivalents and restricted cash per statement of cash flows</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjY5OGFiNzI0YTgzODRhOWI5YWI3NjNmMzYzOTJmM2E5L3RhYmxlcmFuZ2U6Njk4YWI3MjRhODM4NGE5YjlhYjc2M2YzNjM5MmYzYTlfNC0xLTEtMS00NzkwMQ_d925f710-f09b-41c3-ae98-f6cf10aa73c5">178,425</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjY5OGFiNzI0YTgzODRhOWI5YWI3NjNmMzYzOTJmM2E5L3RhYmxlcmFuZ2U6Njk4YWI3MjRhODM4NGE5YjlhYjc2M2YzNjM5MmYzYTlfNC0zLTEtMS00NzkwMQ_80aa3bb8-7002-49d4-9366-14a0091c779d">184,560</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i0b0aa2c04c1d468994df6042db5b45a7_I20201231" decimals="-3" name="us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjY5OGFiNzI0YTgzODRhOWI5YWI3NjNmMzYzOTJmM2E5L3RhYmxlcmFuZ2U6Njk4YWI3MjRhODM4NGE5YjlhYjc2M2YzNjM5MmYzYTlfNC01LTEtMS00NzkwMQ_fc24faa7-0155-4453-8691-3345d4a378a8">255,415</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="iaca4d8e8d21f4aaba26f31a7d752612f_I20210930" decimals="-3" name="us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjY5OGFiNzI0YTgzODRhOWI5YWI3NjNmMzYzOTJmM2E5L3RhYmxlcmFuZ2U6Njk4YWI3MjRhODM4NGE5YjlhYjc2M2YzNjM5MmYzYTlfNC03LTEtMS00NzkwMQ_498d2520-8bf3-439b-8721-30df30dd09ff">192,185</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr></table></div></ix:nonNumeric><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Marketable securities</span></div><div style="margin-bottom:12pt"><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:DebtSecuritiesAvailableForSaleTableTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RleHRyZWdpb246MmM3MjFhYzcxY2E0NDE4MThmMmNlYzVhNDFlZDExOWVfMTMyMA_1dff6388-834b-41a6-b347-9d3bca761de5" escape="true"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table summarizes the Company's marketable securities held at September&#160;30, 2022. </span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company had <ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-6" name="us-gaap:DebtSecuritiesAvailableForSaleExcludingAccruedInterest" format="ixt:fixed-zero" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RleHRyZWdpb246MmM3MjFhYzcxY2E0NDE4MThmMmNlYzVhNDFlZDExOWVfMzIw_023825fc-a1c1-4081-8f49-826fa0bf8048">no</ix:nonFraction> marketable securities as of</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> December&#160;31, 2021.</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"><tr><td style="width:1.0%"></td><td style="width:45.127%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.741%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.602%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.741%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.602%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.741%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.602%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.744%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="21" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30, 2022</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Amortized<br/>Cost</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Gross<br/>Unrealized<br/>Gains</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Gross<br/>Unrealized<br/>Losses</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Fair<br/>Value</span></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Marketable securities</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">U.S. treasury securities</span></td><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="iffd8c924671a4e75a1659b45caa53aa9_I20220930" decimals="-3" name="us-gaap:DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjRlNDFkODE5M2M2ZjRkM2FiNWZiZTlhODdjYmY3N2QxL3RhYmxlcmFuZ2U6NGU0MWQ4MTkzYzZmNGQzYWI1ZmJlOWE4N2NiZjc3ZDFfNy0xLTEtMS00NzkwMQ_390218e4-1aed-4b65-91a2-dfc7c11c09ab">101,342</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="iffd8c924671a4e75a1659b45caa53aa9_I20220930" decimals="-3" name="us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjRlNDFkODE5M2M2ZjRkM2FiNWZiZTlhODdjYmY3N2QxL3RhYmxlcmFuZ2U6NGU0MWQ4MTkzYzZmNGQzYWI1ZmJlOWE4N2NiZjc3ZDFfNy0zLTEtMS00NzkwMQ_61eb2346-02e9-4789-82e4-322e3aec70fe">4</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="iffd8c924671a4e75a1659b45caa53aa9_I20220930" decimals="-3" name="us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjRlNDFkODE5M2M2ZjRkM2FiNWZiZTlhODdjYmY3N2QxL3RhYmxlcmFuZ2U6NGU0MWQ4MTkzYzZmNGQzYWI1ZmJlOWE4N2NiZjc3ZDFfNy01LTEtMS00NzkwMQ_b8ded7f5-e27f-4385-b51a-2122a2fdab18">228</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="iffd8c924671a4e75a1659b45caa53aa9_I20220930" decimals="-3" name="us-gaap:DebtSecuritiesAvailableForSaleExcludingAccruedInterest" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjRlNDFkODE5M2M2ZjRkM2FiNWZiZTlhODdjYmY3N2QxL3RhYmxlcmFuZ2U6NGU0MWQ4MTkzYzZmNGQzYWI1ZmJlOWE4N2NiZjc3ZDFfNy03LTEtMS00NzkwMQ_ccb13d1c-2ed0-4ec5-826d-9249041f16a2">101,118</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">U.S. government agency securities</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i12e1031fe544430f8b5d0812643e1f51_I20220930" decimals="-3" name="us-gaap:DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjRlNDFkODE5M2M2ZjRkM2FiNWZiZTlhODdjYmY3N2QxL3RhYmxlcmFuZ2U6NGU0MWQ4MTkzYzZmNGQzYWI1ZmJlOWE4N2NiZjc3ZDFfOC0xLTEtMS01MjMwMw_ced140bb-46e2-47fb-bccb-23b2c243f1b5">4,933</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i12e1031fe544430f8b5d0812643e1f51_I20220930" decimals="-3" name="us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax" format="ixt:fixed-zero" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjRlNDFkODE5M2M2ZjRkM2FiNWZiZTlhODdjYmY3N2QxL3RhYmxlcmFuZ2U6NGU0MWQ4MTkzYzZmNGQzYWI1ZmJlOWE4N2NiZjc3ZDFfOC0zLTEtMS01MjMwMw_59f995ca-6d7a-4083-a179-e6a7355478de">&#8212;</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="usd" contextRef="i12e1031fe544430f8b5d0812643e1f51_I20220930" decimals="-3" name="us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjRlNDFkODE5M2M2ZjRkM2FiNWZiZTlhODdjYmY3N2QxL3RhYmxlcmFuZ2U6NGU0MWQ4MTkzYzZmNGQzYWI1ZmJlOWE4N2NiZjc3ZDFfOC01LTEtMS01MjMwMw_fb9e431b-7d58-4f69-9b32-6c3c49a671ee">7</ix:nonFraction>)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i12e1031fe544430f8b5d0812643e1f51_I20220930" decimals="-3" name="us-gaap:DebtSecuritiesAvailableForSaleExcludingAccruedInterest" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RhYmxlOjRlNDFkODE5M2M2ZjRkM2FiNWZiZTlhODdjYmY3N2QxL3RhYmxlcmFuZ2U6NGU0MWQ4MTkzYzZmNGQzYWI1ZmJlOWE4N2NiZjc3ZDFfOC03LTEtMS01MjMwMw_46b8550d-4363-4134-bee7-c3f6362945b2">4,926</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr></table></ix:nonNumeric></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">All of the Company's marketable securities are due within one year or less. 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As a result, the Company did <ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-6" name="us-gaap:DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest" format="ixt:fixed-zero" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RleHRyZWdpb246MmM3MjFhYzcxY2E0NDE4MThmMmNlYzVhNDFlZDExOWVfMTE5Mw_db2a8f84-b54b-4177-a029-caec313609c5">not</ix:nonFraction> record any charges for credit-related impairments for its marketable debt securities for the nine months ended as of September&#160;30, 2022.</ix:continuation> </span></div><div style="margin-bottom:12pt"><span><br/></span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">21</span></div></div></div><div id="i036c42b7cd7942de8867eb61947b1b1c_49"></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:6pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Notes to condensed consolidated financial statements (continued)</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">6.&#160;<ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180OS9mcmFnOjk5OTJlMDg2Y2JiYjRhM2RhYWE4ZTZmYzczMGI5NDVmL3RleHRyZWdpb246OTk5MmUwODZjYmJiNGEzZGFhYThlNmZjNzMwYjk0NWZfODg_27ff1a7f-7faa-4a93-ab76-d9182f8ceeca" continuedAt="if4925db168dd4be4922f2ed5d522a216" escape="true">Accrued expenses</ix:nonNumeric></span></div><ix:continuation id="if4925db168dd4be4922f2ed5d522a216"><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180OS9mcmFnOjk5OTJlMDg2Y2JiYjRhM2RhYWE4ZTZmYzczMGI5NDVmL3RleHRyZWdpb246OTk5MmUwODZjYmJiNGEzZGFhYThlNmZjNzMwYjk0NWZfODk_9feab449-e971-4562-8859-925638ebd330" escape="true"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Accrued expenses consisted of the following as of September&#160;30, 2022 and December&#160;31, 2021:</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:70.214%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.842%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.601%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.843%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30,<br/>2022</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">December 31,<br/>2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accrued manufacturing expenses</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" 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style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accrued other</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:OtherAccruedLiabilitiesCurrent" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180OS9mcmFnOjk5OTJlMDg2Y2JiYjRhM2RhYWE4ZTZmYzczMGI5NDVmL3RhYmxlOjg4Y2ZmYWMyMDAzNzRkMjk4YjcyMzY3ODRlODJmYmQ3L3RhYmxlcmFuZ2U6ODhjZmZhYzIwMDM3NGQyOThiNzIzNjc4NGU4MmZiZDdfNi0xLTEtMS00NzkwMQ_8231a83e-87ad-43a5-9d3b-f28ec83edada">286</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="-3" name="us-gaap:OtherAccruedLiabilitiesCurrent" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180OS9mcmFnOjk5OTJlMDg2Y2JiYjRhM2RhYWE4ZTZmYzczMGI5NDVmL3RhYmxlOjg4Y2ZmYWMyMDAzNzRkMjk4YjcyMzY3ODRlODJmYmQ3L3RhYmxlcmFuZ2U6ODhjZmZhYzIwMDM3NGQyOThiNzIzNjc4NGU4MmZiZDdfNi0zLTEtMS00NzkwMQ_b988a57c-6275-4d98-89a0-99ca977d581d">285</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:AccruedLiabilitiesCurrent" format="ixt:num-dot-decimal" scale="3" 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style="margin-bottom:12pt"><span><br/></span></div><div id="i036c42b7cd7942de8867eb61947b1b1c_52"></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">7.&#160;<ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:DebtDisclosureTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfMzA5MQ_859f83b6-36ed-46be-b81e-65294523ce30" continuedAt="id95a2318de694bb48d9f3e4326d35d9e" escape="true">Debt</ix:nonNumeric></span></div><ix:continuation id="id95a2318de694bb48d9f3e4326d35d9e" continuedAt="ie8caf5102cff46aa9f459f2cf8e01f8d"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">On May 8, 2019, the Company entered into a loan and security agreement (the "Prior Credit Facility") with Silicon Valley Bank ("SVB"), which was subsequently amended on June 29, 2019, August 28, 2020, and August 27, 2021. Refer to Note 7, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Debt,</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> in the Company&#8217;s Annual Report on Form 10-K for the year ended December 31, 2021 for more information regarding the Prior Credit Facility. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">On October 29, 2021, the Company entered into a loan and security agreement (the "New Credit Facility") with SVB and Oxford Finance, LLC ("Oxford" and, together with SVB, the "Lenders"). Pursuant to the New Credit Facility, as amended, the Company can borrow term loans in an aggregate amount of $<ix:nonFraction unitRef="usd" contextRef="i91cc1bbe424346e28f50da140693be2d_I20211029" decimals="-5" name="us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfNzE1_f873a12c-d2c3-4518-b272-cb6f36450e91">100.0</ix:nonFraction> million, which includes (i) $<ix:nonFraction unitRef="usd" contextRef="i5b8956fe49b14b54a81db9901c817435_I20211029" decimals="INF" name="us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfNzM4_22c555b1-bb07-4fd1-be69-84fb05c3ab36"><ix:nonFraction unitRef="usd" contextRef="ie1519b6cf4a2488685dc5bda84a400d1_I20211029" decimals="INF" name="us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfNzM4_630c4ef3-f68b-4320-b0a0-9b76c92a59d0"><ix:nonFraction unitRef="usd" contextRef="ib8d0d6043153475fa26d317576466aad_I20211029" decimals="INF" name="us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfNzM4_85246936-b702-406c-9303-2cc4b3c0541c">60.0</ix:nonFraction></ix:nonFraction></ix:nonFraction> million in up to <ix:nonFraction unitRef="advance" contextRef="i0a8422af71604bbaa3942869b3477e51_I20211029" decimals="INF" name="mrsn:DebtPrincipalAdvances" format="ixt-sec:numwordsen" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfNzUw_3107e2ed-917b-4928-8c61-bb48e6923629">three</ix:nonFraction> principal advances through December 31, 2022, (ii) an additional $<ix:nonFraction unitRef="usd" contextRef="icee5d5df7322426c9063035dce4cbca7_I20211029" decimals="INF" name="us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfODE4_6ebf8b4f-0f45-44d3-a2c6-419efa1f5f4a">20.0</ix:nonFraction> million in <ix:nonFraction unitRef="advance" contextRef="icee5d5df7322426c9063035dce4cbca7_I20211029" decimals="INF" name="mrsn:DebtPrincipalAdvances" format="ixt-sec:numwordsen" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfODI0_65e26c99-48b7-4f16-a2c3-4da4669e91d2">one</ix:nonFraction> principal advance, if the Company reaches certain development milestone events through June 30, 2023, (iii) and an additional tranche of $<ix:nonFraction unitRef="usd" contextRef="i3cdac27759b3439da32853c975a7bd78_I20211029" decimals="INF" name="us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfOTY0_547ef1fb-1071-40ba-9c63-b75c5a377729">20.0</ix:nonFraction> million, subject to conditional approval from the Lenders. The New Credit Facility is secured by substantially all of the Company's personal property owned or later acquired, excluding intellectual property (but including the rights to payments and proceeds from intellectual property), and a negative pledge on intellectual property. The Company drew $<ix:nonFraction unitRef="usd" contextRef="ic273b28491d943d1878df53d1779074e_D20211029-20211029" decimals="-5" name="us-gaap:ProceedsFromLinesOfCredit" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfMTMxMQ_7e8edbd1-3c87-42be-b767-fe5043cd3a85">25.0</ix:nonFraction> million upon execution of the New Credit Facility, of which $<ix:nonFraction unitRef="usd" contextRef="i85d8071ed7fe4f61bd84d86e12ed525f_D20211029-20211029" decimals="-5" name="us-gaap:RepaymentsOfLinesOfCredit" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfMTM2Ng_b9f27859-385c-4a57-bac7-02fd320e7fd0">5.5</ix:nonFraction> million of the proceeds was used to repay the existing balance under the Prior Credit Facility and satisfy its obligations to SVB. Upon entering into the New Credit Facility, the Company terminated all commitments by SVB to extend further credit under the Prior Credit Facility and all guarantees and security interests granted by the Company to SVB under the Prior Credit Facility.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Refer to Note 7, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Debt</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, in the Company&#8217;s Annual Report on Form 10-K for the year ended December 31, 2021 for more information regarding the New Credit Facility. As of September&#160;30, 2022, the Company was in compliance with all covenants under the New Credit Facility. There are no events of default as of September&#160;30, 2022.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Unamortized debt financing costs are recorded as a reduction of the carrying amount on the term loan and amortized as interest expense using the effective-interest method. Unamortized deferred financing costs of $<ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-5" name="us-gaap:DeferredFinanceCostsNet" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfMjI0Nw_cccd6a45-9fbd-4c69-b17d-0da5158006b7">0.1</ix:nonFraction> million were recorded in other assets as of September&#160;30, 2022 related to the Company's right to borrow additional amounts from the Lenders in the future and amortized to interest expense over the relevant draw period on a straight-line basis.</span></div></ix:continuation><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">22</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:6pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Notes to condensed consolidated financial statements (continued)</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div></div><ix:continuation id="ie8caf5102cff46aa9f459f2cf8e01f8d" continuedAt="ie86d977d1c7d47338d8a719c0268d50e"><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:ScheduleOfDebtTableTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfMzA4Nw_e6e4e4c7-213c-45b9-b0c1-ddf8fd497397" escape="true"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following is a summary of obligations under the term loan as of September&#160;30, 2022:</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:84.957%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.843%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30,<br/>2022</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total debt</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:DebtInstrumentCarryingAmount" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RhYmxlOjdmYTI3MzQyOWViNzRiMzQ4OWY4YjZkMDRiOGE5YWZiL3RhYmxlcmFuZ2U6N2ZhMjczNDI5ZWI3NGIzNDg5ZjhiNmQwNGI4YTlhZmJfMS0xLTEtMS00NzkwMQ_5dafe5bb-93ad-49a8-a31c-01637377f6a9">25,000</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Less: Current portion of long-term debt</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New 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portion</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:LongTermDebtNoncurrent" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RhYmxlOjdmYTI3MzQyOWViNzRiMzQ4OWY4YjZkMDRiOGE5YWZiL3RhYmxlcmFuZ2U6N2ZhMjczNDI5ZWI3NGIzNDg5ZjhiNmQwNGI4YTlhZmJfMy0xLTEtMS00NzkwMQ_0ead85dc-0f32-45bd-956d-f12fb02d630f">25,000</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" 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id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RhYmxlOjdmYTI3MzQyOWViNzRiMzQ4OWY4YjZkMDRiOGE5YWZiL3RhYmxlcmFuZ2U6N2ZhMjczNDI5ZWI3NGIzNDg5ZjhiNmQwNGI4YTlhZmJfNC0xLTEtMS00NzkwMQ_3d8947d1-fbb6-4eb3-82eb-3bc69a840b5e">345</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accretion related to final payment</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:DebtInstrumentUnamortizedPremium" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RhYmxlOjdmYTI3MzQyOWViNzRiMzQ4OWY4YjZkMDRiOGE5YWZiL3RhYmxlcmFuZ2U6N2ZhMjczNDI5ZWI3NGIzNDg5ZjhiNmQwNGI4YTlhZmJfNS0xLTEtMS00NzkwMQ_e7272ed3-81f9-4876-a679-679e1f6e824d">198</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Long-term debt, net</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="-3" name="us-gaap:LongTermDebt" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RhYmxlOjdmYTI3MzQyOWViNzRiMzQ4OWY4YjZkMDRiOGE5YWZiL3RhYmxlcmFuZ2U6N2ZhMjczNDI5ZWI3NGIzNDg5ZjhiNmQwNGI4YTlhZmJfNi0xLTEtMS00NzkwMQ_866302b5-0889-4797-a1d0-eaff5076523e">24,853</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr></table></div></ix:nonNumeric></ix:continuation><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"><ix:continuation id="ie86d977d1c7d47338d8a719c0268d50e">Interest expense related to the New Credit Facility for the three and nine months ended September&#160;30, 2022 was $<ix:nonFraction unitRef="usd" contextRef="i9905e43305e841da8e5303dbe6fd5e6a_D20220701-20220930" decimals="-5" name="us-gaap:InterestExpenseDebt" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfMjY0OQ_a3205b44-8d07-4435-bd27-6a6cd433c131">0.8</ix:nonFraction>&#160;million and $<ix:nonFraction unitRef="usd" contextRef="i9b2e89a98d1e47799e0cce74c698697c_D20220101-20220930" decimals="-5" name="us-gaap:InterestExpenseDebt" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfMjY1Ng_ddd92d41-1e5b-4807-aa1c-28e21c31a9f3">2.3</ix:nonFraction>&#160;million, respectively. The Company did <ix:nonFraction unitRef="usd" contextRef="i433d080f383048febe588042a6d38528_D20210701-20210930" decimals="INF" name="us-gaap:InterestExpenseDebt" format="ixt:fixed-zero" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfMjY5MA_176bc16c-4aab-4c5e-aadf-518caabcf49b"><ix:nonFraction unitRef="usd" contextRef="i5fdcf45fb7e644b396ad6ac18f412cbd_D20210101-20210930" decimals="INF" name="us-gaap:InterestExpenseDebt" format="ixt:fixed-zero" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfMjY5MA_4cdaca6d-878c-4eed-9d8a-4e4c5cfd18fb">no</ix:nonFraction></ix:nonFraction>t recognize any interest expense related to the New Credit Facility during the three or nine months ended September 30, 2021.  Interest expense related to the Prior Credit Facility for the three and nine months ended September 30, 2021 was $<ix:nonFraction unitRef="usd" contextRef="ifec43e35520e45ef8c63b49a7930b748_D20210701-20210930" decimals="-5" name="us-gaap:InterestExpenseDebt" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfMjkyMA_1b009f8c-4405-4e8d-8565-aa393414ef63">0.1</ix:nonFraction>&#160;million and $<ix:nonFraction unitRef="usd" contextRef="i5e2d10a7cefd438abcfa96a2a553564d_D20210101-20210930" decimals="-5" name="us-gaap:InterestExpenseDebt" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfMjkyNw_ce998245-15fb-49f9-8c44-d1eeab354e20">0.3</ix:nonFraction>&#160;million, respectively.  The Company did <ix:nonFraction unitRef="usd" contextRef="id76558f708de410a92c286cf4b9ed72e_D20220101-20220930" decimals="INF" name="us-gaap:InterestExpenseDebt" format="ixt:fixed-zero" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfMjk2Mg_30db7b04-0772-4db9-aad9-27f0dfa8bb2a"><ix:nonFraction unitRef="usd" contextRef="idef15f038218454aa4b14d079007ff02_D20220701-20220930" decimals="INF" name="us-gaap:InterestExpenseDebt" format="ixt:fixed-zero" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181Mi9mcmFnOjU4Zjk2NzJkNWMxMjQ3ZjJiNTlkZWNhOWFmMGQ0ZWFiL3RleHRyZWdpb246NThmOTY3MmQ1YzEyNDdmMmI1OWRlY2E5YWYwZDRlYWJfMjk2Mg_5d64ee50-af88-466e-8138-2318e8ec7bd0">no</ix:nonFraction></ix:nonFraction>t recognize any interest expense related to the Prior Credit Facility during the three or nine months ended September 30, 2022.</ix:continuation>  </span></div><div style="margin-bottom:12pt"><span><br/></span></div><div id="i036c42b7cd7942de8867eb61947b1b1c_55"></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">8.&#160;<ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:StockholdersEquityNoteDisclosureTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfMjM3MQ_f807d9e1-73e5-444b-b374-35618c7ac924" continuedAt="ifc25cd829aec4d10b3d6d3f98dcb28be" escape="true">Stockholders&#8217; equity </ix:nonNumeric></span></div><ix:continuation id="ifc25cd829aec4d10b3d6d3f98dcb28be" continuedAt="i3df3a1e9bc0b4c49a553dcbbb81509ef"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Preferred stock</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of September&#160;30, 2022, the Company had <ix:nonFraction unitRef="shares" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="INF" name="us-gaap:PreferredStockSharesAuthorized" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfNzI_ebea5408-b09e-41ee-96b4-69e6901c9633">25,000,000</ix:nonFraction> shares of authorized preferred stock. <ix:nonFraction unitRef="shares" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="INF" name="us-gaap:PreferredStockSharesIssued" format="ixt:fixed-zero" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfMTEz_a3d6e0a8-b8f7-4205-b90a-0c5970854abb">No</ix:nonFraction> shares of preferred stock have been issued.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">At-the-market ("ATM") equity offering program</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In May 2020, the Company established an ATM equity offering program (the "2020 ATM"), pursuant to which it was able to offer and sell up to $<ix:nonFraction unitRef="usd" contextRef="ib6850270aebd430286164471ad9595fb_I20200531" decimals="INF" name="mrsn:StockIssuanceProgramAuthorizedAmount" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfMzQ2_0dc7da06-66c9-47f1-b550-9852d2880b02">100.0</ix:nonFraction> million of its common stock from time to time at prevailing market prices. During the first quarter of 2022, the Company sold <ix:nonFraction unitRef="shares" contextRef="i9c0851d29fec4f5a843a4fd5b0aabead_D20220101-20220331" decimals="INF" name="us-gaap:StockIssuedDuringPeriodSharesNewIssues" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfNDY3_da60bce7-f962-4b5b-95ae-dfb16d84a5fb">11,740,210</ix:nonFraction> shares of common stock and received net proceeds of $<ix:nonFraction unitRef="usd" contextRef="i9c0851d29fec4f5a843a4fd5b0aabead_D20220101-20220331" decimals="-5" name="us-gaap:ProceedsFromIssuanceOfCommonStock" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfNTIy_5621d383-d9d1-40fd-83b0-152c543dc070">54.8</ix:nonFraction> million under the 2020 ATM. As of March 31, 2022, the 2020 ATM had been fully utilized.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In February 2022, the Company established a new ATM equity offering program (the "2022 ATM"), pursuant to which it is able to offer and sell up to $<ix:nonFraction unitRef="usd" contextRef="ia450652b50f74f03a8bca0741c032a23_I20220228" decimals="INF" name="mrsn:StockIssuanceProgramAuthorizedAmount" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfNzUy_90dbc7b5-0054-46f0-9551-a95cb6994019">100.0</ix:nonFraction>&#160;million of its common stock from time to time at prevailing market prices. During the nine months ended September&#160;30, 2022, the Company sold <ix:nonFraction unitRef="shares" contextRef="i1a735bff8d0f4f928fb36ba8c779ebb3_D20220101-20220930" decimals="INF" name="us-gaap:StockIssuedDuringPeriodSharesNewIssues" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfODg0_5befeb22-19ef-484e-9560-48f0c55ea90a">12,717,288</ix:nonFraction> shares of common stock and received net proceeds of $<ix:nonFraction unitRef="usd" contextRef="i1a735bff8d0f4f928fb36ba8c779ebb3_D20220101-20220930" decimals="-5" name="us-gaap:ProceedsFromIssuanceOfCommonStock" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfOTM5_453f888c-3187-48d3-8674-db98dff2df0a">56.5</ix:nonFraction> million under the 2022 ATM. As of September&#160;30, 2022, approximately $<ix:nonFraction unitRef="usd" contextRef="i0bcf44381ac944b3bff475af8c1a1896_I20220930" decimals="-5" name="mrsn:StockIssuanceProgramRemainingUnsoldAndAvailableAmount" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfOTg3_ef011d5f-7928-4eda-9dd5-7cb44dfbad73">42.4</ix:nonFraction>&#160;million remained unsold and available for sale under the 2022 ATM.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Warrants</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In connection with a 2013 Series&#160;A-1 Preferred Stock issuance, the Company granted to certain investors warrants to purchase <ix:nonFraction unitRef="shares" contextRef="ie42555c5fe72475686d60134182f1acc_D20130101-20131231" decimals="INF" name="mrsn:ClassOfWarrantOrRightSecuritiesCalledByWarrantsOrRightsNumberIssued" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfMTE4Mg_c50b4d3a-0628-424d-a455-1dd25c37768c">129,491</ix:nonFraction> shares of common stock. The warrants have a $<ix:nonFraction unitRef="usdPerShare" contextRef="i9ec10f61704c46e489f540e5dd7304a7_I20131231" decimals="INF" name="us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfMTIyOQ_fc6a09de-7252-4a31-827e-8613d9071db4">0.05</ix:nonFraction> per share exercise price and a contractual life of <ix:nonNumeric contextRef="ie42555c5fe72475686d60134182f1acc_D20130101-20131231" name="mrsn:ContractualLifeOfWarrants" format="ixt-sec:duryear" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfMTI4Mw_22fb2131-e8c7-49ce-a699-7dc09b2e03e3">10</ix:nonNumeric> years. The fair value of these warrants was recorded as a component of equity at the time of issuance. As of September&#160;30, 2022, there were warrants to purchase <ix:nonFraction unitRef="shares" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="INF" name="us-gaap:ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfMTQyNQ_17507ea5-80aa-49bb-8f15-903b89381b53">22,590</ix:nonFraction> shares of common stock outstanding. During the nine months ended September&#160;30, 2022, the Company issued <ix:nonFraction unitRef="shares" contextRef="i2033b29b471b4c6da723393eef301cda_D20220101-20220930" decimals="INF" name="mrsn:WarrantsExercisedInPeriod" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfMTUxNA_f6f100bf-8252-488b-9d9a-53c68a4a1c4c">16,654</ix:nonFraction> shares of common stock upon the exercise of warrants.</span></div></ix:continuation><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">23</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:6pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Notes to condensed consolidated financial statements (continued)</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div></div><ix:continuation id="i3df3a1e9bc0b4c49a553dcbbb81509ef"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Common stock</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">At the 2022 Annual Meeting of Stockholders on June 9, 2022, the Company's stockholders approved an amendment to the Company&#8217;s Fifth Amended and Restated Certificate of Incorporation to increase the number of authorized shares of common stock, $<ix:nonFraction unitRef="usdPerShare" contextRef="i6cc8257a60a5481c94dc1246a140fe64_I20220609" decimals="4" name="us-gaap:CommonStockParOrStatedValuePerShare" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfMTgyNw_d2819701-f144-46ea-912b-3b650d8cc571">0.0001</ix:nonFraction> par value per share, from <ix:nonFraction unitRef="shares" contextRef="i088b0d75b08b4b2caf64e309460cff4c_I20220608" decimals="INF" name="us-gaap:CommonStockSharesAuthorized" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfMTg1Ng_4e972e91-143b-4860-ab07-5946c80231e1">175,000,000</ix:nonFraction> to <ix:nonFraction unitRef="shares" contextRef="i6cc8257a60a5481c94dc1246a140fe64_I20220609" decimals="INF" name="us-gaap:CommonStockSharesAuthorized" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfMTg2Mg_7a3e1c0d-7139-444f-a217-b64954e8d78f">350,000,000</ix:nonFraction>. This increase became effective upon filing of a Certificate of Amendment with the Secretary of State of Delaware on June 9, 2022. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:CommonStockVotingRights" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfMjM3Mw_75662943-62e9-450a-9975-7a8279c2b557">The holders of the common stock are entitled to one vote for each share held.</ix:nonNumeric> Common stockholders are not entitled to receive dividends, unless declared by the Board of Directors (the "Board").</span></div><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:ScheduleOfStockByClassTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfMjM3Mg_a118e3da-1988-4fa9-b589-19c1f18c2fcc" escape="true"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of September&#160;30, 2022 and December&#160;31, 2021, there were <ix:nonFraction unitRef="shares" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="INF" name="us-gaap:CommonStockCapitalSharesReservedForFutureIssuance" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfMjIxOQ_96da448e-bb5a-4228-b5ca-cd48f6ee0304">12,418,052</ix:nonFraction> and <ix:nonFraction unitRef="shares" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="INF" name="us-gaap:CommonStockCapitalSharesReservedForFutureIssuance" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RleHRyZWdpb246YmE3M2Q0MDcxNWI1NGIxOWE3MjcwNjkxYWRkYjQ4MWRfMjIyNg_febc0ba5-1ccd-4cdc-b086-bc5e0992bf4b">9,199,512</ix:nonFraction>, respectively, shares of common stock reserved for the exercise of outstanding stock options, restricted stock units ("RSUs") and warrants.</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:70.214%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.842%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.601%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.843%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30,<br/>2022</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">December 31,<br/>2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Stock options</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="if7c8baa800ae43b38ded0972d5d28590_I20220930" decimals="INF" name="us-gaap:CommonStockCapitalSharesReservedForFutureIssuance" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RhYmxlOmFmZDVlM2U2NGEwNDQ2ZTc5ZjE4ZjZiYWM0NzQ5MGM0L3RhYmxlcmFuZ2U6YWZkNWUzZTY0YTA0NDZlNzlmMThmNmJhYzQ3NDkwYzRfMS0xLTEtMS00NzkwMQ_ff620b55-b45d-4c8d-ad73-022d8215ac53">10,524,780</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="ifaa791cca58e41bbac19552e6f0e080c_I20211231" decimals="INF" name="us-gaap:CommonStockCapitalSharesReservedForFutureIssuance" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RhYmxlOmFmZDVlM2U2NGEwNDQ2ZTc5ZjE4ZjZiYWM0NzQ5MGM0L3RhYmxlcmFuZ2U6YWZkNWUzZTY0YTA0NDZlNzlmMThmNmJhYzQ3NDkwYzRfMS0zLTEtMS00NzkwMQ_20f43c71-ec5c-49af-bb38-ae9418fc0e8b">8,342,429</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Restricted stock units</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="i2b1c37fa26454f35ba6a4877684232cf_I20220930" decimals="INF" name="us-gaap:CommonStockCapitalSharesReservedForFutureIssuance" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RhYmxlOmFmZDVlM2U2NGEwNDQ2ZTc5ZjE4ZjZiYWM0NzQ5MGM0L3RhYmxlcmFuZ2U6YWZkNWUzZTY0YTA0NDZlNzlmMThmNmJhYzQ3NDkwYzRfMi0xLTEtMS00NzkwMQ_8b349043-09e3-4e34-8734-a84f4b1a0d12">1,870,682</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 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style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Warrants</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="ic9052ff8540e4e41819a3091c578ccfe_I20220930" decimals="INF" name="us-gaap:CommonStockCapitalSharesReservedForFutureIssuance" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RhYmxlOmFmZDVlM2U2NGEwNDQ2ZTc5ZjE4ZjZiYWM0NzQ5MGM0L3RhYmxlcmFuZ2U6YWZkNWUzZTY0YTA0NDZlNzlmMThmNmJhYzQ3NDkwYzRfMy0xLTEtMS00NzkwMQ_81888b0c-e9db-4d32-9a83-e39a6a0bdf59">22,590</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="i9ce2c2352cf942eb8b4f2bd861de8e08_I20211231" decimals="INF" name="us-gaap:CommonStockCapitalSharesReservedForFutureIssuance" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RhYmxlOmFmZDVlM2U2NGEwNDQ2ZTc5ZjE4ZjZiYWM0NzQ5MGM0L3RhYmxlcmFuZ2U6YWZkNWUzZTY0YTA0NDZlNzlmMThmNmJhYzQ3NDkwYzRfMy0zLTEtMS00NzkwMQ_14f9b8fa-33f7-4575-ab73-9f07bd1cf6e9">39,474</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="INF" name="us-gaap:CommonStockCapitalSharesReservedForFutureIssuance" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RhYmxlOmFmZDVlM2U2NGEwNDQ2ZTc5ZjE4ZjZiYWM0NzQ5MGM0L3RhYmxlcmFuZ2U6YWZkNWUzZTY0YTA0NDZlNzlmMThmNmJhYzQ3NDkwYzRfNS0xLTEtMS00NzkwMQ_b44c95fd-567e-4983-955d-154ae57fa2e4">12,418,052</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="INF" name="us-gaap:CommonStockCapitalSharesReservedForFutureIssuance" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181NS9mcmFnOmJhNzNkNDA3MTViNTRiMTlhNzI3MDY5MWFkZGI0ODFkL3RhYmxlOmFmZDVlM2U2NGEwNDQ2ZTc5ZjE4ZjZiYWM0NzQ5MGM0L3RhYmxlcmFuZ2U6YWZkNWUzZTY0YTA0NDZlNzlmMThmNmJhYzQ3NDkwYzRfNS0zLTEtMS00NzkwMQ_cd41538c-316d-4011-91c1-8285632ce4a3">9,199,512</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr></table></div></ix:nonNumeric></ix:continuation><div style="margin-bottom:12pt"><span><br/></span></div><div id="i036c42b7cd7942de8867eb61947b1b1c_58"></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">9.&#160;<ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfNjY2MQ_de341d36-8319-432a-8a51-071756ed7f9e" continuedAt="idb6f4a0cffc84503a1208bfbed4bfe72" escape="true">Stock-based compensation</ix:nonNumeric></span></div><ix:continuation id="idb6f4a0cffc84503a1208bfbed4bfe72" continuedAt="i3938a478ba4d4ba09fce326ca1036d57"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Stock incentive plans</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of June 30, 2017, there were <ix:nonFraction unitRef="shares" contextRef="i77fe7a02e4a743dcba99328b23f9bbd1_I20170630" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfODc_2748aefe-182d-4629-9081-e07a4e9225e6">3,141,625</ix:nonFraction> stock options outstanding under the Company&#8217;s 2007 Stock Incentive Plan (the "2007 Plan"). The 2007 Plan expired in June 2017. Any cancellations or forfeitures of options granted under the 2007 Plan will increase the options available under the 2017 Stock Incentive Plan (the "2017 Plan"), as described below.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In June 2017, the Company&#8217;s stockholders approved the 2017 Plan. Under the 2017 Plan initially, up to <ix:nonFraction unitRef="shares" contextRef="i7355d47ef2a9437484ac8395750296f7_I20170630" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfNTAy_af9cf3d8-bfc4-460e-ad71-aa251a8e023d">2,255,000</ix:nonFraction> shares of common stock could be granted to the Company's employees, officers, directors, consultants and advisors in the form of options, RSUs or other stock-based awards. The number of shares of common stock issuable under the 2017 Plan will be cumulatively increased annually on January 1 by the lesser of (a) <ix:nonFraction unitRef="number" contextRef="i72d758c53dc14422a45baa7d52cdd956_D20170601-20170630" decimals="2" name="mrsn:ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximumCumulativeAnnualIncrease" scale="-2" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfODE3_9a194ca8-ac31-4082-8461-9eace590dc9b">4</ix:nonFraction>% of the outstanding shares on the immediately preceding December 31 or (b) such other amount specified by the Board. The terms of the awards are determined by the Board, subject to the provisions of the 2017 Plan. Any cancellations or forfeitures of options granted under the 2007 Plan, which expired in June 2017, would increase the number of shares that could be granted under the 2017 Plan. On January 1, 2022, the number of shares of common stock issuable under the 2017 Plan was increased by <ix:nonFraction unitRef="shares" contextRef="i6e9297d9a8bc4f368b0403ff942189aa_D20220101-20220101" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfMTMxNg_719c719c-fa11-4cac-ac7b-cdf3e7ade482">2,948,362</ix:nonFraction> shares. As of September&#160;30, 2022, there were <ix:nonFraction unitRef="shares" contextRef="iabc7aaf0728d487c917f2cd06378ba90_I20220930" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfMTM0OA_bcbb478f-5076-42aa-84fe-36e2447af6e4">1,372,006</ix:nonFraction> shares available for future issuance under the 2017 Plan. During the nine months ended September&#160;30, 2022, the Company granted <ix:nonFraction unitRef="shares" contextRef="i105c35c13bb54efcaa9107364a0a20c2_D20220101-20220930" decimals="INF" name="mrsn:ShareBasedCompensationArrangementsByShareBasedPaymentAwardGrantsInPeriodGross" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfMTQ2MA_c7b99096-0abe-4275-a9a3-0ff501fddee8">3,532,433</ix:nonFraction> RSUs and options to purchase shares of common stock to employees and non-employee directors under the 2017 Plan.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Under the 2017 Plan, both with respect to incentive stock options and nonqualified stock options, the exercise price per share will not be less than the fair market value of the common stock on the date of grant and the vesting period is generally <ix:nonNumeric contextRef="i96e2943c4c8c46bfb127979acdce4166_D20220101-20220930" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" format="ixt-sec:durwordsen" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfMTgyNA_ede1135b-178d-45b5-91a2-22c5d01ff254">four years</ix:nonNumeric>. Options granted under the 2017 Plan expire no later than <ix:nonNumeric contextRef="i59ebfd7f0a5d4cf0aa855626e3244465_D20220101-20220930" name="us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod" format="ixt-sec:duryear" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfMTg4NQ_a891d054-d731-469b-a2b5-7ce0819154eb">10</ix:nonNumeric> years from the date of grant. Options under the 2007 Plan were granted at an exercise price established by the Board (or a committee thereof) that was not less than the fair market value of the underlying common stock on the date of grant and subject to such vesting provisions determined by the Board (or a committee thereof). The Board may accelerate vesting or otherwise adjust the terms of granted options in the case of a merger, consolidation, dissolution, or liquidation of the Company.</span></div></ix:continuation><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">24</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:6pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Notes to condensed consolidated financial statements (continued)</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div></div><ix:continuation id="i3938a478ba4d4ba09fce326ca1036d57" continuedAt="i36960f19bd5b416cb727c429cf40b31a"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Inducement awards</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">From time to time, the Company grants to its employees, upon approval by the Board or an authorized committee thereof, options to purchase shares of common stock as an inducement to employment in accordance with Nasdaq Listing Rule 5635(c)(4). Prior to February 2022, these options were granted outside of an existing equity incentive plan. These options are subject to terms substantially the same as the 2017 Plan. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In February 2022, the Board adopted the Company's 2022 Inducement Stock Incentive Plan (the "Inducement Plan"), which provides for the grant of nonstatutory options, stock appreciation rights, restricted stock, RSUs and other stock-based awards, with respect to an aggregate of <ix:nonFraction unitRef="shares" contextRef="ic2ac7d173bb74185b813e2560efcc79c_I20220228" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfMzA5MA_1b7c93d7-fbf9-465b-9e73-608fe868da4e">2,000,000</ix:nonFraction> shares of the Company's common stock (subject to adjustment as provided in the Inducement Plan). During the nine months ended September&#160;30, 2022, the Company granted <ix:nonFraction unitRef="shares" contextRef="ic0ececbde39b4207887d794c8c8a6e7e_D20220101-20220930" decimals="INF" name="mrsn:ShareBasedCompensationArrangementsByShareBasedPaymentAwardGrantsInPeriodGross" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfMzI0MQ_abb63486-4fb7-427d-8bc5-04e402c9062b">612,450</ix:nonFraction> RSUs and options to purchase shares of common stock to newly hired employees under the Inducement Plan. As of September&#160;30, 2022, there were <ix:nonFraction unitRef="shares" contextRef="i98ad9d9582924fb0aa746eac75127fc2_I20220930" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfMzM1Nw_c5428933-a255-4e40-af87-4e59f89679be">1,403,975</ix:nonFraction> shares available for future issuance under the Inducement Plan. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of September&#160;30, 2022, there were <ix:nonFraction unitRef="shares" contextRef="i3b3cb213b5bf4aee945ed65d994e15e6_I20220930" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfMzQ0Ng_182e9b02-889f-49d7-9aba-1a2cc2aeccc1">757,500</ix:nonFraction> options to purchase shares of common stock outstanding which were granted as inducement awards prior to the establishment of the Inducement Plan.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Stock option activity</span></div><div style="margin-bottom:12pt"><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfNjY2NQ_bb4d5363-e615-49ec-b809-eecfe2049a77" escape="true"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">A summary of stock option activity is as follows:</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:70.214%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.842%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.601%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.843%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Number<br/>of&#160;Shares</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Weighted-<br/>Average<br/>Exercise&#160;Price</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Outstanding at January&#160;1, 2022</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOmIwMTU3OWViMGEzZjQyNDM4MjNiMGIwYjg5MzY3MTUxL3RhYmxlcmFuZ2U6YjAxNTc5ZWIwYTNmNDI0MzgyM2IwYjBiODkzNjcxNTFfMS0xLTEtMS00NzkwMQ_2f4d011a-05d0-4110-9b21-50b1a3afd72b">8,342,429</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usdPerShare" contextRef="i5be5c265a26648f1b63d58c3078f1677_I20211231" decimals="2" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOmIwMTU3OWViMGEzZjQyNDM4MjNiMGIwYjg5MzY3MTUxL3RhYmxlcmFuZ2U6YjAxNTc5ZWIwYTNmNDI0MzgyM2IwYjBiODkzNjcxNTFfMS0zLTEtMS00NzkwMQ_120eadaa-0a7b-44f6-ad23-c30918620ffc">11.25</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Granted</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOmIwMTU3OWViMGEzZjQyNDM4MjNiMGIwYjg5MzY3MTUxL3RhYmxlcmFuZ2U6YjAxNTc5ZWIwYTNmNDI0MzgyM2IwYjBiODkzNjcxNTFfMi0xLTEtMS00NzkwMQ_1c5cfd78-f42a-46ae-9111-bfb7ea6e4ca2">2,765,034</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usdPerShare" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="2" name="us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOmIwMTU3OWViMGEzZjQyNDM4MjNiMGIwYjg5MzY3MTUxL3RhYmxlcmFuZ2U6YjAxNTc5ZWIwYTNmNDI0MzgyM2IwYjBiODkzNjcxNTFfMi0zLTEtMS00NzkwMQ_fcf802c4-66de-49ee-917d-782415ff967a">5.41</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Exercised</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="shares" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="INF" name="us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOmIwMTU3OWViMGEzZjQyNDM4MjNiMGIwYjg5MzY3MTUxL3RhYmxlcmFuZ2U6YjAxNTc5ZWIwYTNmNDI0MzgyM2IwYjBiODkzNjcxNTFfMy0xLTEtMS00NzkwMQ_4cdd9701-b1af-4240-a6e0-7341df62b4e5">54,299</ix:nonFraction>)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usdPerShare" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="2" name="us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOmIwMTU3OWViMGEzZjQyNDM4MjNiMGIwYjg5MzY3MTUxL3RhYmxlcmFuZ2U6YjAxNTc5ZWIwYTNmNDI0MzgyM2IwYjBiODkzNjcxNTFfMy0zLTEtMS00NzkwMQ_51bde811-9d14-4703-80f8-2d811baca78b">3.81</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Cancelled</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="shares" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOmIwMTU3OWViMGEzZjQyNDM4MjNiMGIwYjg5MzY3MTUxL3RhYmxlcmFuZ2U6YjAxNTc5ZWIwYTNmNDI0MzgyM2IwYjBiODkzNjcxNTFfNC0xLTEtMS00NzkwMQ_6f8200e6-ca1d-4d70-b6aa-43dc5e48e29d">528,384</ix:nonFraction>)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New 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Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Outstanding at September&#160;30,&#160;2022</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOmIwMTU3OWViMGEzZjQyNDM4MjNiMGIwYjg5MzY3MTUxL3RhYmxlcmFuZ2U6YjAxNTc5ZWIwYTNmNDI0MzgyM2IwYjBiODkzNjcxNTFfNS0xLTEtMS00NzkwMQ_be066e9d-70ab-48aa-bf3d-37494a4d51e6">10,524,780</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usdPerShare" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="2" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOmIwMTU3OWViMGEzZjQyNDM4MjNiMGIwYjg5MzY3MTUxL3RhYmxlcmFuZ2U6YjAxNTc5ZWIwYTNmNDI0MzgyM2IwYjBiODkzNjcxNTFfNS0zLTEtMS00NzkwMQ_d61d9c44-dc90-48b8-ac49-28f98b75d0e2">9.65</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Vested and expected to vest at September 30, 2022</span></td><td colspan="2" style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOmIwMTU3OWViMGEzZjQyNDM4MjNiMGIwYjg5MzY3MTUxL3RhYmxlcmFuZ2U6YjAxNTc5ZWIwYTNmNDI0MzgyM2IwYjBiODkzNjcxNTFfNi0xLTEtMS00NzkwMQ_ddca0ff3-5541-46a8-adca-2a3d8a9f7e3b">10,524,780</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usdPerShare" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="2" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOmIwMTU3OWViMGEzZjQyNDM4MjNiMGIwYjg5MzY3MTUxL3RhYmxlcmFuZ2U6YjAxNTc5ZWIwYTNmNDI0MzgyM2IwYjBiODkzNjcxNTFfNi0zLTEtMS00NzkwMQ_1b3d47f1-ee0d-4ae4-9936-c9471e4012af">9.65</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Exercisable at September&#160;30,&#160;2022</span></td><td colspan="2" style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:3pt double #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOmIwMTU3OWViMGEzZjQyNDM4MjNiMGIwYjg5MzY3MTUxL3RhYmxlcmFuZ2U6YjAxNTc5ZWIwYTNmNDI0MzgyM2IwYjBiODkzNjcxNTFfNy0xLTEtMS00NzkwMQ_e410cf65-26ad-44a9-9a98-9ccda9a72a08">5,339,351</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:3pt double #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usdPerShare" contextRef="if1a7d43ea9eb4074bddba58773933d57_I20220930" decimals="2" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOmIwMTU3OWViMGEzZjQyNDM4MjNiMGIwYjg5MzY3MTUxL3RhYmxlcmFuZ2U6YjAxNTc5ZWIwYTNmNDI0MzgyM2IwYjBiODkzNjcxNTFfNy0zLTEtMS00NzkwMQ_66eff543-6743-4fcf-8ca0-27700c39e0b1">8.96</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr></table></ix:nonNumeric></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The weighted-average grant date fair value of options granted during the nine months ended September&#160;30, 2022 and 2021 was $<ix:nonFraction unitRef="usdPerShare" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="2" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfMzc3Mg_10ad6e61-dd3a-4276-8971-81a5cfb57c3f">3.96</ix:nonFraction> and $<ix:nonFraction unitRef="usdPerShare" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="2" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfMzc3OQ_f642dcce-83c5-4937-bcdd-cb39af91c91e">12.37</ix:nonFraction> per share, respectively. The total intrinsic value of options exercised during the nine months ended September&#160;30, 2022 and 2021 was $<ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-5" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfMzg5Ng_c7709641-3b6a-45c6-a335-8a644a8fa984">0.1</ix:nonFraction>&#160;million and $<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-5" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfMzkwMw_6d41002d-cb7f-4b13-9ffe-58517c9efee4">3.9</ix:nonFraction>&#160;million, respectively. The aggregate intrinsic value represents the difference between the exercise price and the selling price received by option holders upon the exercise of stock options during the period.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Cash received from the exercise of stock options was $<ix:nonFraction unitRef="usd" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="-5" name="us-gaap:ProceedsFromStockOptionsExercised" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfNDE2MA_efb556d5-bf4f-4522-a68d-cba673fc4fc0">0.2</ix:nonFraction> million and $<ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-5" name="us-gaap:ProceedsFromStockOptionsExercised" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfNDE2Nw_60902b3b-6bcd-470e-8edc-1b42d4ea9293">1.5</ix:nonFraction> million for the nine months ended September&#160;30, 2022 and 2021, respectively.</span></div></ix:continuation><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">25</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:6pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Notes to condensed consolidated financial statements (continued)</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div></div><ix:continuation id="i36960f19bd5b416cb727c429cf40b31a" continuedAt="i8e297488e4f14aec8b0ffe287e323681"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Restricted stock units</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company periodically issues RSUs with a service condition to certain officers and other employees that typically vest between <ix:nonNumeric contextRef="i9c5471a1abfc47838912b56bea1400e1_D20220101-20220930" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" format="ixt-sec:durwordsen" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfNDM3Mg_1b8a2293-d477-4f88-a99b-e5baaf87b71b">one year</ix:nonNumeric> and <ix:nonNumeric contextRef="if0e933d73d77469cb1ad194bece4868f_D20220101-20220930" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" format="ixt-sec:durwordsen" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfNDM3OQ_e447435b-695c-4a30-9af2-56f35af8a272">four years</ix:nonNumeric> from the grant date.</span></div><div style="margin-bottom:12pt"><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfNjY3NA_dabffc0e-9ad0-405a-ab7a-3d70fa304b8f" escape="true"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">A summary of the RSU activity is as follows:</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:84.957%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.843%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Number of Shares</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Unvested at January&#160;1, 2022</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="i2ee59033a4274a23ba0916f4485d3d0d_I20211231" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjA0MDE2ZmQ4YTVlYzRjMmI4NzFmOGI3YWE2MDlhM2E3L3RhYmxlcmFuZ2U6MDQwMTZmZDhhNWVjNGMyYjg3MWY4YjdhYTYwOWEzYTdfMS0xLTEtMS00NzkwMQ_688c3d0f-2f4e-49e7-aec5-35464b79d241">817,609</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Granted</span></td><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="i79fc4f400eeb4cc9ac58eec3070fdb99_D20220101-20220930" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjA0MDE2ZmQ4YTVlYzRjMmI4NzFmOGI3YWE2MDlhM2E3L3RhYmxlcmFuZ2U6MDQwMTZmZDhhNWVjNGMyYjg3MWY4YjdhYTYwOWEzYTdfMi0xLTEtMS00NzkwMQ_0744271c-0ee4-46d3-b50c-f4fdc887eb90">1,379,849</ix:nonFraction>&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Vested</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="shares" contextRef="i79fc4f400eeb4cc9ac58eec3070fdb99_D20220101-20220930" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjA0MDE2ZmQ4YTVlYzRjMmI4NzFmOGI3YWE2MDlhM2E3L3RhYmxlcmFuZ2U6MDQwMTZmZDhhNWVjNGMyYjg3MWY4YjdhYTYwOWEzYTdfMy0xLTEtMS00NzkwMQ_8ef36f91-10a5-443f-bf4d-c51a20926d0a">190,841</ix:nonFraction>)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Forfeited</span></td><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(<ix:nonFraction unitRef="shares" contextRef="i79fc4f400eeb4cc9ac58eec3070fdb99_D20220101-20220930" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjA0MDE2ZmQ4YTVlYzRjMmI4NzFmOGI3YWE2MDlhM2E3L3RhYmxlcmFuZ2U6MDQwMTZmZDhhNWVjNGMyYjg3MWY4YjdhYTYwOWEzYTdfNC0xLTEtMS00NzkwMQ_c0c7b560-66fb-47f5-9b1b-104b4c587c23">135,935</ix:nonFraction>)</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Unvested at September&#160;30,&#160;2022</span></td><td colspan="2" style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="ide692c7b856848b982a715d60d5c7f86_I20220930" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjA0MDE2ZmQ4YTVlYzRjMmI4NzFmOGI3YWE2MDlhM2E3L3RhYmxlcmFuZ2U6MDQwMTZmZDhhNWVjNGMyYjg3MWY4YjdhYTYwOWEzYTdfNS0xLTEtMS00NzkwMQ_99a27849-13c0-42a3-aa57-1f7b44461c7d">1,870,682</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr></table></ix:nonNumeric></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Stock-based compensation expense</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company uses the provisions of ASC 718, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Stock Compensation</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, to account for all stock-based awards to employees and non-employees.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Stock-based compensation expense is recognized over the requisite service period, which is generally the vesting period, using the straight-line 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style="width:1.0%"></td><td style="width:45.694%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.720%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.441%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.720%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.441%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.720%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.441%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.723%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three Months Ended September 30,</span></td><td colspan="3" 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Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Stock options</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i6bca952aa9424ac68071c6a41bfd3600_D20220701-20220930" decimals="-3" name="us-gaap:AllocatedShareBasedCompensationExpense" format="ixt:num-dot-decimal" scale="3" 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1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i05a6c90a341f4172842cd0c3e3de26bd_D20220101-20220930" decimals="-3" name="us-gaap:AllocatedShareBasedCompensationExpense" format="ixt:num-dot-decimal" scale="3" 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style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i9c8b7eae89324c2785da3e6bb271ca91_D20210101-20210930" decimals="-3" name="us-gaap:AllocatedShareBasedCompensationExpense" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjRhY2VjMDBhMjdkNzRmMzZiYTliNDE5ZjUzOWI4ZTFjL3RhYmxlcmFuZ2U6NGFjZWMwMGEyN2Q3NGYzNmJhOWI0MTlmNTM5YjhlMWNfMi03LTEtMS00NzkwMQ_64f81f42-7f49-4a4c-b0af-010485918e36">10,617</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Restricted stock units</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="icce61d5788064ea582b9f78bdc69dd34_D20220701-20220930" decimals="-3" name="us-gaap:AllocatedShareBasedCompensationExpense" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjRhY2VjMDBhMjdkNzRmMzZiYTliNDE5ZjUzOWI4ZTFjL3RhYmxlcmFuZ2U6NGFjZWMwMGEyN2Q3NGYzNmJhOWI0MTlmNTM5YjhlMWNfMy0xLTEtMS00NzkwMQ_952333fa-dbfb-4446-a736-bd6173f3debc">1,365</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i4b1773da396d4bfd99a4266d279819f3_D20210701-20210930" decimals="-3" name="us-gaap:AllocatedShareBasedCompensationExpense" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjRhY2VjMDBhMjdkNzRmMzZiYTliNDE5ZjUzOWI4ZTFjL3RhYmxlcmFuZ2U6NGFjZWMwMGEyN2Q3NGYzNmJhOWI0MTlmNTM5YjhlMWNfMy0zLTEtMS00NzkwMQ_d61bceed-d413-4554-847a-8c2419fa8587">881</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i79fc4f400eeb4cc9ac58eec3070fdb99_D20220101-20220930" decimals="-3" name="us-gaap:AllocatedShareBasedCompensationExpense" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjRhY2VjMDBhMjdkNzRmMzZiYTliNDE5ZjUzOWI4ZTFjL3RhYmxlcmFuZ2U6NGFjZWMwMGEyN2Q3NGYzNmJhOWI0MTlmNTM5YjhlMWNfMy01LTEtMS00NzkwMQ_5572b25c-bc1b-4307-94f3-3ac57596feb5">3,832</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i23a25e68804c4eef8ddfd38ad3bf9dcc_D20210101-20210930" decimals="-3" name="us-gaap:AllocatedShareBasedCompensationExpense" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjRhY2VjMDBhMjdkNzRmMzZiYTliNDE5ZjUzOWI4ZTFjL3RhYmxlcmFuZ2U6NGFjZWMwMGEyN2Q3NGYzNmJhOWI0MTlmNTM5YjhlMWNfMy03LTEtMS00NzkwMQ_225c3ac3-01b9-4305-99f8-c2b94655837e">2,636</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Employee stock purchase plan</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i7db23342a6af42c8b246abd127870390_D20220701-20220930" decimals="-3" name="us-gaap:AllocatedShareBasedCompensationExpense" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjRhY2VjMDBhMjdkNzRmMzZiYTliNDE5ZjUzOWI4ZTFjL3RhYmxlcmFuZ2U6NGFjZWMwMGEyN2Q3NGYzNmJhOWI0MTlmNTM5YjhlMWNfNC0xLTEtMS00NzkwMQ_7dea1bb9-aa6e-4d07-b393-dfcf5dc99005">109</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="if39dce26091a424c95ed69a1e2020a65_D20210701-20210930" decimals="-3" name="us-gaap:AllocatedShareBasedCompensationExpense" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjRhY2VjMDBhMjdkNzRmMzZiYTliNDE5ZjUzOWI4ZTFjL3RhYmxlcmFuZ2U6NGFjZWMwMGEyN2Q3NGYzNmJhOWI0MTlmNTM5YjhlMWNfNC0zLTEtMS00NzkwMQ_f90226f6-81ad-4dcf-a265-d48d930819ac">61</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i11ba8d2feef7420f8d59adc11224e8f9_D20220101-20220930" decimals="-3" name="us-gaap:AllocatedShareBasedCompensationExpense" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjRhY2VjMDBhMjdkNzRmMzZiYTliNDE5ZjUzOWI4ZTFjL3RhYmxlcmFuZ2U6NGFjZWMwMGEyN2Q3NGYzNmJhOWI0MTlmNTM5YjhlMWNfNC01LTEtMS00NzkwMQ_51a6c944-808c-4c86-a477-db6d0c49bcf4">424</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="id87c62bfaeb3411e879d4d412a2e9450_D20210101-20210930" decimals="-3" name="us-gaap:AllocatedShareBasedCompensationExpense" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjRhY2VjMDBhMjdkNzRmMzZiYTliNDE5ZjUzOWI4ZTFjL3RhYmxlcmFuZ2U6NGFjZWMwMGEyN2Q3NGYzNmJhOWI0MTlmNTM5YjhlMWNfNC03LTEtMS00NzkwMQ_5a6369ec-ad94-41ae-af60-2d1e42a7ee9c">296</ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Stock-based compensation expense included in total operating expenses</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="-3" name="us-gaap:AllocatedShareBasedCompensationExpense" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjRhY2VjMDBhMjdkNzRmMzZiYTliNDE5ZjUzOWI4ZTFjL3RhYmxlcmFuZ2U6NGFjZWMwMGEyN2Q3NGYzNmJhOWI0MTlmNTM5YjhlMWNfNS0xLTEtMS00NzkwMQ_c35b6777-7738-4fb2-941b-9a32a0b3850d">5,375</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" decimals="-3" name="us-gaap:AllocatedShareBasedCompensationExpense" format="ixt:num-dot-decimal" scale="3" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjRhY2VjMDBhMjdkNzRmMzZiYTliNDE5ZjUzOWI4ZTFjL3RhYmxlcmFuZ2U6NGFjZWMwMGEyN2Q3NGYzNmJhOWI0MTlmNTM5YjhlMWNfNS0zLTEtMS00NzkwMQ_0535e7ec-8199-47ac-962f-54aefa9989ae">4,928</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid 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1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="-3" name="us-gaap:AllocatedShareBasedCompensationExpense" format="ixt:num-dot-decimal" scale="3" 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id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfNjY3MQ_cea82715-d507-4636-bc66-50af1731f64e" escape="true"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table presents stock-based compensation expense as reflected in the Company&#8217;s condensed consolidated statements of operations and comprehensive loss:</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:45.534%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.720%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.601%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.720%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.441%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.720%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.441%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.723%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three Months Ended September 30,</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended September 30,</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New 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solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="iacae0a66f7924d058bff97fd9552ca3a_D20210701-20210930" decimals="-3" name="us-gaap:AllocatedShareBasedCompensationExpense" format="ixt:num-dot-decimal" scale="3" 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style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">26</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:6pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Notes to condensed consolidated financial statements (continued)</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div></div><ix:continuation id="i8e297488e4f14aec8b0ffe287e323681"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of September&#160;30, 2022, there was $<ix:nonFraction unitRef="usd" contextRef="ie2aee7114fba47549491b955a75454c0_I20220930" decimals="-5" name="us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" format="ixt:num-dot-decimal" scale="6" 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respectively, that is expected to be recognized over a weighted-average period of <ix:nonNumeric contextRef="i05a6c90a341f4172842cd0c3e3de26bd_D20220101-20220930" name="us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" format="ixt-sec:duryear" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfNTMyNw_9f8eb9d6-6c14-4664-aaf8-7010d45f4f62">2.2</ix:nonNumeric> years and <ix:nonNumeric contextRef="i79fc4f400eeb4cc9ac58eec3070fdb99_D20220101-20220930" name="us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" format="ixt-sec:duryear" 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estimated on the date of grant using the Black-Scholes option pricing model with the following weighted average assumptions:</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:47.457%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.560%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.601%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.560%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.441%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.560%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.441%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:10.280%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three Months Ended<br/>September 30,</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended September 30,</span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 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Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Risk-free interest rate</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="number" contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="3" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" scale="-2" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjhlZTExYjcyZDgwZjQ1N2JhZDI3MTk4YjYxMDlhMmExL3RhYmxlcmFuZ2U6OGVlMTFiNzJkODBmNDU3YmFkMjcxOThiNjEwOWEyYTFfMi0xLTEtMS00NzkwMQ_a32c4214-db8b-4660-9907-f3d4d373668c">2.9</ix:nonFraction>&#160;</span></td><td 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unitRef="number" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" format="ixt:fixed-zero" scale="-2" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjhlZTExYjcyZDgwZjQ1N2JhZDI3MTk4YjYxMDlhMmExL3RhYmxlcmFuZ2U6OGVlMTFiNzJkODBmNDU3YmFkMjcxOThiNjEwOWEyYTFfMy01LTEtMS00NzkwMQ_5c371eae-aa42-428f-9562-e61b2729e16d">&#8212;</ix:nonFraction>&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="number" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" format="ixt:fixed-zero" scale="-2" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjhlZTExYjcyZDgwZjQ1N2JhZDI3MTk4YjYxMDlhMmExL3RhYmxlcmFuZ2U6OGVlMTFiNzJkODBmNDU3YmFkMjcxOThiNjEwOWEyYTFfMy03LTEtMS00NzkwMQ_1a82a3fa-0b47-4648-9313-5dd873ca2ef3">&#8212;</ix:nonFraction>&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Expected term (years)</span></td><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" name="us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" format="ixt-sec:duryear" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjhlZTExYjcyZDgwZjQ1N2JhZDI3MTk4YjYxMDlhMmExL3RhYmxlcmFuZ2U6OGVlMTFiNzJkODBmNDU3YmFkMjcxOThiNjEwOWEyYTFfNC0xLTEtMS00NzkwMQ_a9b07475-63bb-42fe-b588-b193273a3d4a">6.11</ix:nonNumeric></span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" name="us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" format="ixt-sec:duryear" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjhlZTExYjcyZDgwZjQ1N2JhZDI3MTk4YjYxMDlhMmExL3RhYmxlcmFuZ2U6OGVlMTFiNzJkODBmNDU3YmFkMjcxOThiNjEwOWEyYTFfNC0zLTEtMS00NzkwMQ_d4bc34e3-39f1-4a1f-ad4d-c5273091719a">6.11</ix:nonNumeric></span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" format="ixt-sec:duryear" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjhlZTExYjcyZDgwZjQ1N2JhZDI3MTk4YjYxMDlhMmExL3RhYmxlcmFuZ2U6OGVlMTFiNzJkODBmNDU3YmFkMjcxOThiNjEwOWEyYTFfNC01LTEtMS00NzkwMQ_b481767b-7647-4cf7-bfa8-0f57c190758c">5.99</ix:nonNumeric></span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" name="us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" format="ixt-sec:duryear" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjhlZTExYjcyZDgwZjQ1N2JhZDI3MTk4YjYxMDlhMmExL3RhYmxlcmFuZ2U6OGVlMTFiNzJkODBmNDU3YmFkMjcxOThiNjEwOWEyYTFfNC03LTEtMS00NzkwMQ_b2dc20f8-6621-432d-a527-c6c885d2b7d2">6.05</ix:nonNumeric></span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Expected stock price volatility</span></td><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="number" contextRef="i1191201f07224103a069eace2b0290b3_D20220701-20220930" decimals="2" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" scale="-2" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjhlZTExYjcyZDgwZjQ1N2JhZDI3MTk4YjYxMDlhMmExL3RhYmxlcmFuZ2U6OGVlMTFiNzJkODBmNDU3YmFkMjcxOThiNjEwOWEyYTFfNS0xLTEtMS00NzkwMQ_c6a993d1-575d-465b-ac2a-a37afedc7391">94</ix:nonFraction>&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="number" contextRef="i15b3eb941c514f6385df192216cb08d4_D20210701-20210930" decimals="2" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" scale="-2" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjhlZTExYjcyZDgwZjQ1N2JhZDI3MTk4YjYxMDlhMmExL3RhYmxlcmFuZ2U6OGVlMTFiNzJkODBmNDU3YmFkMjcxOThiNjEwOWEyYTFfNS0zLTEtMS00NzkwMQ_f855162b-fe52-4372-a919-5c9827650d3c">82</ix:nonFraction>&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New 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1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="number" contextRef="ic1f771f8a545488685f2afa494159ed1_D20210101-20210930" decimals="2" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" scale="-2" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjhlZTExYjcyZDgwZjQ1N2JhZDI3MTk4YjYxMDlhMmExL3RhYmxlcmFuZ2U6OGVlMTFiNzJkODBmNDU3YmFkMjcxOThiNjEwOWEyYTFfNS03LTEtMS00NzkwMQ_c07769ac-a5ff-464c-938b-aecef5c2b36e">83</ix:nonFraction>&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr></table></ix:nonNumeric></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Expected volatility for the Company&#8217;s common stock is determined based on the historical volatility of comparable publicly traded companies. The risk-free interest rate is based on the yield of U.S. Treasury securities consistent with the expected term of the option. <ix:nonFraction unitRef="number" contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" format="ixt:fixed-zero" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfNTc4NQ_3e892d5b-3501-44c9-8d28-28b2f5b250d1">No</ix:nonFraction> dividend yield was assumed as the Company has not historically and does not expect to pay dividends on its common stock. The expected term of the options granted is based on the use of the simplified method, in which the expected term is presumed to be the mid-point between the vesting date and the end of the contractual term.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The fair value of RSUs is determined based on the closing price of the Company&#8217;s common stock on the date of grant.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Employee stock purchase plan</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During the year ended December 31, 2017, the Board adopted, and the Company&#8217;s stockholders approved the 2017 employee stock purchase plan (the "2017 ESPP"). The Company issued <ix:nonFraction unitRef="shares" contextRef="i4013d95f4c7c40bc92f124920e324106_D20220101-20220930" decimals="INF" name="us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfNjQzOA_a13297a7-b71c-471d-b627-28bd9815de32">154,235</ix:nonFraction> shares under the 2017 ESPP during the nine months ended September&#160;30, 2022 and issued <ix:nonFraction unitRef="shares" contextRef="ia3d75adc677c4a63874869583181fbc6_D20210101-20210930" decimals="INF" name="us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfNjUxOA_a20b7f17-92bc-4724-8115-d1d2a61c038f">36,198</ix:nonFraction> shares under the 2017 ESPP during the nine months ended September&#160;30, 2021. As of September&#160;30, 2022, there were <ix:nonFraction unitRef="shares" contextRef="ied056eb1d21347de8d425377553d5d59_I20220930" decimals="INF" name="us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfNjYwOA_01e21202-0338-4317-a13b-07c7dc5d0c19">412,330</ix:nonFraction> shares available for issuance under the 2017 ESPP.</span></div></ix:continuation><div style="margin-bottom:12pt"><span><br/></span></div><div id="i036c42b7cd7942de8867eb61947b1b1c_61"></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">10. <ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:EarningsPerSharePolicyTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY182MS9mcmFnOjlkZWM4ZTQ3MDMzNTQ0Mjk4MDQ2ZTcxYjVkZTI2YjNmL3RleHRyZWdpb246OWRlYzhlNDcwMzM1NDQyOTgwNDZlNzFiNWRlMjZiM2ZfMTE4OA_03b63667-5b4d-40a1-9ff3-ea6898968cf9" continuedAt="i12cd599cc3b14b4a9d47edf21774056b" escape="true"><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:EarningsPerShareTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY182MS9mcmFnOjlkZWM4ZTQ3MDMzNTQ0Mjk4MDQ2ZTcxYjVkZTI2YjNmL3RleHRyZWdpb246OWRlYzhlNDcwMzM1NDQyOTgwNDZlNzFiNWRlMjZiM2ZfMTE4OQ_96adab38-83c5-4ea4-946c-d57e0bcf43c2" continuedAt="ibaf15be55d394dd28c8581ff36340a0b" escape="true">Net loss per share</ix:nonNumeric></ix:nonNumeric></span></div><ix:continuation id="ibaf15be55d394dd28c8581ff36340a0b" continuedAt="i48ab6402c7c5477297c8f986417818b3"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"><ix:continuation id="i12cd599cc3b14b4a9d47edf21774056b" continuedAt="i4a7fa92627594326be4b731c3fafc97b">Basic net loss per share of common stock is calculated by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period, without further consideration for potentially dilutive securities. Diluted net loss per share is computed by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock and potentially dilutive securities outstanding for the period determined using the treasury stock method.</ix:continuation></span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"><ix:continuation id="i4a7fa92627594326be4b731c3fafc97b">For purposes of the diluted net loss per share calculation, stock options, unvested RSUs and warrants to purchase common stock are considered to be potentially dilutive securities, but are excluded from the calculation of diluted net loss per share because their effect would be anti-dilutive and therefore, basic and diluted net loss per share were the same for all periods presented.</ix:continuation> </span></div></ix:continuation><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">27</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:6pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of Contents</a></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Mersana Therapeutics,&#160;Inc.</span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Notes to condensed consolidated financial statements (continued)</span></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">(unaudited)</span></div></div><ix:continuation id="i48ab6402c7c5477297c8f986417818b3"><ix:nonNumeric contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930" name="us-gaap:ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY182MS9mcmFnOjlkZWM4ZTQ3MDMzNTQ0Mjk4MDQ2ZTcxYjVkZTI2YjNmL3RleHRyZWdpb246OWRlYzhlNDcwMzM1NDQyOTgwNDZlNzFiNWRlMjZiM2ZfMTE5MQ_9e3b22da-d925-42e8-b400-cd7abd89dd97" escape="true"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table sets forth the outstanding potentially dilutive securities that have been excluded from the calculation of diluted net loss per share because to include them would be anti-dilutive (in common stock equivalent shares):</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:49.220%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:23.419%"></td><td style="width:0.1%"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td style="width:0.1%"></td><td style="width:0.441%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:23.420%"></td><td style="width:0.1%"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three and Nine Months Ended<br/>September 30, 2022</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three and Nine Months Ended<br/>September 30, 2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Stock options</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="if48dd6977ba24e44a567d5b5262d2052_D20220101-20220930" decimals="0" name="us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY182MS9mcmFnOjlkZWM4ZTQ3MDMzNTQ0Mjk4MDQ2ZTcxYjVkZTI2YjNmL3RhYmxlOmM5YzgwNDY1YjI2NDQ2Y2U4OTExMzBiNDE0ZTQyODdmL3RhYmxlcmFuZ2U6YzljODA0NjViMjY0NDZjZTg5MTEzMGI0MTRlNDI4N2ZfMS0xLTEtMS00NzkwMQ_bb1c6e3f-b269-4364-b8d9-218c2a478f42"><ix:nonFraction unitRef="shares" contextRef="if7db639a4c8a454783f3787a94e3b236_D20220701-20220930" decimals="0" name="us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY182MS9mcmFnOjlkZWM4ZTQ3MDMzNTQ0Mjk4MDQ2ZTcxYjVkZTI2YjNmL3RhYmxlOmM5YzgwNDY1YjI2NDQ2Y2U4OTExMzBiNDE0ZTQyODdmL3RhYmxlcmFuZ2U6YzljODA0NjViMjY0NDZjZTg5MTEzMGI0MTRlNDI4N2ZfMS0xLTEtMS00NzkwMQ_d2f6c69f-b8d2-4533-a889-27ae53b00c30">10,524,780</ix:nonFraction></ix:nonFraction>&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="iee7fd1b41be8498ba79a89494e05dd7a_D20210101-20210930" decimals="0" name="us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" format="ixt:num-dot-decimal" scale="0" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY182MS9mcmFnOjlkZWM4ZTQ3MDMzNTQ0Mjk4MDQ2ZTcxYjVkZTI2YjNmL3RhYmxlOmM5YzgwNDY1YjI2NDQ2Y2U4OTExMzBiNDE0ZTQyODdmL3RhYmxlcmFuZ2U6YzljODA0NjViMjY0NDZjZTg5MTEzMGI0MTRlNDI4N2ZfMS01LTEtMS00NzkwMQ_52c05d60-10bc-4fcf-a59a-7b3fe2dfd38c"><ix:nonFraction unitRef="shares" contextRef="i06dbfeb58b83414ab4287a3160f44174_D20210701-20210930" decimals="0" name="us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" format="ixt:num-dot-decimal" scale="0" 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id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY182MS9mcmFnOjlkZWM4ZTQ3MDMzNTQ0Mjk4MDQ2ZTcxYjVkZTI2YjNmL3RhYmxlOmM5YzgwNDY1YjI2NDQ2Y2U4OTExMzBiNDE0ZTQyODdmL3RhYmxlcmFuZ2U6YzljODA0NjViMjY0NDZjZTg5MTEzMGI0MTRlNDI4N2ZfMi0xLTEtMS00NzkwMQ_686ed9ce-2fc5-489e-8ae6-7d1e823fc198">1,870,682</ix:nonFraction></ix:nonFraction>&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="i4a397d4da6974c6194dce38fc35c86e0_D20210701-20210930" decimals="0" 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During the three and nine months ended September&#160;30, 2021, the Company recorded research and development expense of $<ix:nonFraction unitRef="usd" contextRef="icc65fb147052457abc71ac3387966a3b_D20210701-20210930" decimals="-5" name="us-gaap:ResearchAndDevelopmentArrangementContractToPerformForOthersCostsIncurredGross" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY182NC9mcmFnOmE1MDg1NjY3N2E1NjRiYmJhZTJmZmJkNzRmYWI2OWJhL3RleHRyZWdpb246YTUwODU2Njc3YTU2NGJiYmFlMmZmYmQ3NGZhYjY5YmFfNjM5_d2325160-3c08-401e-bbd1-5169c6489553">1.2</ix:nonFraction>&#160;million and $<ix:nonFraction unitRef="usd" contextRef="i44c3ec121f894d7e971f72ad90213c4c_D20210101-20210930" decimals="-5" name="us-gaap:ResearchAndDevelopmentArrangementContractToPerformForOthersCostsIncurredGross" format="ixt:num-dot-decimal" scale="6" id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY182NC9mcmFnOmE1MDg1NjY3N2E1NjRiYmJhZTJmZmJkNzRmYWI2OWJhL3RleHRyZWdpb246YTUwODU2Njc3YTU2NGJiYmFlMmZmYmQ3NGZhYjY5YmFfNTQ5NzU1ODE0NzYz_ae410b9d-5fb3-4a78-b523-e108cae4ebe7">2.1</ix:nonFraction>&#160;million, respectively, related to development milestones associated with UpRi.</span></div></ix:continuation><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">28</span></div></div></div><div id="i036c42b7cd7942de8867eb61947b1b1c_73"></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%"> Item&#160;2.&#160;Management&#8217;s Discussion and Analysis of Financial Condition and Results of Operations</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">The following discussion and analysis of our financial condition and results of operations should be read in conjunction with our unaudited condensed consolidated financial statements and the related notes appearing elsewhere in this Quarterly Report on Form 10-Q and the audited financial statements and the accompanying notes included in our Annual Report on Form 10-K for the year ended December&#160;31, 2021 filed with the Securities and Exchange Commission, or SEC, on February 28, 2022.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Our actual results and the timing of certain events may differ materially from the results discussed, projected, anticipated, or indicated in any forward-looking statements. We caution you that forward-looking statements are not guarantees of future performance and that our actual results of operations, financial condition and liquidity, and the development of the industry in which we operate may differ materially from the forward-looking statements contained in this Quarterly Report. In addition, even if our results of operations, financial condition and liquidity, and the development of the industry in which we operate are consistent with the forward-looking statements contained in this Quarterly Report, they may not be predictive of results or developments in future periods.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">The following information and any forward-looking statements should be considered in light of factors discussed elsewhere in this Quarterly Report on Form 10-Q, including those risks identified under Part II, Item 1A. Risk Factors.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">We caution readers not to place undue reliance on any forward-looking statements made by us, which speak only as of the date they are made. We disclaim any obligation, except as specifically required by law and the rules of the SEC to publicly update or revise any such statements to reflect any change in our expectations or in events, conditions or circumstances on which any such statements may be based, or that may affect the likelihood that actual results will differ from those set forth in the forward-looking statements.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Overview</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We are a clinical-stage biopharmaceutical company focused on developing antibody-drug conjugates, or ADCs, that offer a clinically meaningful benefit for cancer patients with significant unmet need. We have leveraged over 20 years of industry learning in the ADC field to develop proprietary and differentiated technology platforms that enable us to develop ADCs designed to have improved efficacy, safety and tolerability relative to existing ADC therapies.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We believe that our innovative platforms, including Dolaflexin and Dolasynthen, which deliver our proprietary auristatin DolaLock payload, as well as Immunosynthen, which delivers our propriety stimulator of interferon genes, or STING, agonist Immunolock payload, comprise a product engine that has enabled a robust discovery pipeline for us and our partners. Our ADCs in preclinical studies and clinical trials include first-in-class molecules that target multiple tumor types with high unmet medical need. Our belief is that our novel ADCs may have more favorable safety and efficacy compared to traditional ADCs developed using first-generation technology.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our goal is to become a leading oncology company by leveraging the potential of our innovative and differentiated ADC technologies and the experience and competencies of our management team to identify, acquire and develop promising ADC product candidates and to commercialize cancer therapeutics that are improvements over existing treatments.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">29</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Upifitamab rilsodotin, or UpRi, our first-in-class ADC targeting the sodium-dependent phosphate transport protein NaPi2b, utilizes the Dolaflexin platform to deliver approximately 10 DolaLock payload molecules per antibody. We believe the NaPi2b antigen is broadly expressed in ovarian cancer and other cancers with limited expression in healthy tissue. We are currently evaluating a 36 mg/m</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:6.5pt;font-weight:400;line-height:120%;position:relative;top:-3.5pt;vertical-align:baseline">2</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> dose of UpRi every four weeks in platinum-resistant ovarian cancer in a single-arm registrational trial, which we refer to as UPLIFT. We completed enrollment of approximately 270 patients in UPLIFT in October 2022. The trial's primary endpoint is the objective response rate, or ORR, in the overall population, and secondary endpoints include the ORR in the overall population, as well as duration of objective response and incidence and severity of adverse events. While analysis of patient biopsies is ongoing, we have exceeded our minimum targeted number of NaPi2b positive patients necessary for the primary endpoint analysis. We expect to report top-line data from UPLIFT in mid-2023. If the data from UPLIFT is positive, we are targeting the submission of a potential biologics licensing application, or BLA, in platinum-resistant ovarian cancer to the U.S. Food and Drug Administration, or FDA, by the end of 2023. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We are also conducting a randomized, placebo-controlled Phase 3 clinical trial, referred to as UP-NEXT, to investigate a 30 mg/m</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:6.5pt;font-weight:400;line-height:120%;position:relative;top:-3.5pt;vertical-align:baseline">2</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> dose of UpRi as a single-agent maintenance treatment in patients with recurrent platinum-sensitive ovarian cancer that have high NaPi2b expression. We believe the UP-NEXT trial, if successful, could serve as a post-approval confirmatory trial in the United States, support one or more applications for marketing approval outside of the United States, and support UpRi's expansion into earlier lines of therapy. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Additionally, we are conducting a Phase 1/2 combination trial, which we refer to as UPGRADE-A. In UPGRADE-A, we are exploring the combination of UpRi with carboplatin, a standard platinum chemotherapy broadly used in the treatment of patients with platinum-sensitive ovarian cancer. We are currently conducting the dose escalation portion of UPGRADE-A. We expect to enter the dose expansion portion of UPGRADE-A in the first quarter of 2023 and to present data from the trial in the second half of 2023. We may explore other combinations as part of a series of UPGRADE trials in the future. Together, data from our trials of UpRi have the potential to establish the safety and efficacy of UpRi across a wide range of ovarian cancer patients, from those who are platinum-resistant and heavily pre-treated to those in earlier lines of treatment for the disease.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The second product candidate we are developing is XMT-1660, a B7-H4-directed Dolasynthen ADC with a precise, target-optimized drug-to-antibody ratio, or DAR, of six and our clinically validated DolaLock microtubule inhibitor payload with controlled bystander effect. B7-H4 is overexpressed in a range of cancers, including breast, endometrial and ovarian cancers. In preclinical studies, XMT-1660 demonstrated robust anti-tumor activity after a single dose in multiple patient-derived tumor xenografts.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We are enrolling patients in a Phase 1 clinical trial  investigating the safety, tolerability and anti-tumor activity of XMT-1660 in patients with solid tumors, including breast, endometrial and ovarian cancers. The initial dose escalation portion of this trial will evaluate the safety and tolerability of XMT-1660 as a single agent. The dose expansion portion of the trial will evaluate the safety, tolerability and efficacy of XMT-1660 as a single agent with primary efficacy-related endpoints of investigator-assessed objective response rate and duration of response.  </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The third product candidate we are advancing into clinical development is XMT-2056, an Immunosynthen STING-agonist ADC (DAR 8) that targets a novel human epidermal growth factor receptor 2, or HER2, epitope. In preclinical models, XMT-2056 demonstrated robust anti-tumor activity as a monotherapy in both HER2-high and HER2-low expressing models, and enhanced efficacy has been shown when used in combination with multiple approved agents, including trastuzumab, pertuzumab, anti-PD-1, or trastuzumab deruxtecan. Preclinical data also suggest that XMT-2056 has the potential to enable immunological memory for prolonged anti-tumor activity. The FDA has cleared our IND application related to XMT-2056, and we expect to initiate a Phase 1 clinical trial of XMT-2056 in HER2-expressing tumors such as breast cancer, gastric cancer, and non-small cell lung cancer, or NSCLC, in the fourth quarter of 2022. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We also have two earlier stage preclinical candidates, which we refer to as XMT-2068 and XMT-2175, that leverage our Immunosynthen platform and target tumor-associated antigens.  </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">30</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In May 2022, we made the decision to discontinue the development of XMT-1592, a Dolasynthen ADC that had been in a Phase 1 dose exploration trial in patients with ovarian cancer and NSCLC, and to close this company-sponsored trial, which process was completed in September 2022.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We have entered into a global collaboration providing GlaxoSmithKline Intellectual Property (No. 4) Limited, or GSK, an exclusive option to co-develop and commercialize XMT-2056. In addition, we have established strategic research and development partnerships with Janssen Biotech, Inc., or Janssen, and Merck KGaA for the development and commercialization of additional ADC product candidates leveraging our proprietary Dolasynthen and Dolaflexin platforms, respectively, against a limited number of targets selected by our partners. We believe the potential of our ADC product candidates and technologies, supported by our scientific and technical expertise and enabled by our intellectual property strategy, all support our independent and collaborative efforts to discover and develop life-changing ADCs for patients fighting cancer.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Since inception, our operations have focused on building our platforms, identifying potential product candidates, producing drug substance and drug product material for use in preclinical studies, conducting preclinical and toxicology studies, manufacturing clinical trial material and conducting clinical trials, establishing and protecting our intellectual property, staffing our company and raising capital. We do not have any products approved for sale and have not generated any revenue from product sales. We have funded our operations primarily through our strategic partnerships, private placements of our convertible preferred stock and public offerings of our common stock, including through our at-the-market, or ATM, equity offering programs.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Since inception, we have incurred significant cumulative operating losses. For the nine months ended September&#160;30, 2022, the net loss was $159.3 million, compared to $121.1 million in the nine months ended September&#160;30, 2021. As of September&#160;30, 2022, we had an accumulated deficit of $609.8 million. We expect to continue to incur significant expenses and operating losses over the next several years. We anticipate that our expenses will increase significantly in connection with our ongoing activities, as we:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">continue clinical development activities for UpRi, XMT-1660 and XMT-2056;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">prepare for a potential BLA submission for UpRi by the end of 2023;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">continue diagnostic development efforts with respect to the NaPi2b biomarker;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">continue activities to discover, validate and develop additional product candidates, including XMT-2068 and XMT-2175;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">maintain, expand and protect our intellectual property portfolio; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">hire additional research, development, general and administrative and commercial personnel.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Impact of COVID-19 on Our Business</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We are continuing to monitor the impact of the ongoing COVID-19 pandemic on our operations and ongoing clinical and preclinical development, as well as discovery efforts. Mitigation activities to minimize COVID-19-related operational disruptions are ongoing and include:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">We are currently enrolling patients at clinical sites in different geographic areas around the world in our ongoing clinical trials, though staffing constraints have been an increasing challenge for the clinical sites with which we work. If staffing challenges persist, we may experience associated delays in trial enrollment. We are in the process of initiating additional clinical sites both inside and outside the United States to increase enrollment that we believe could also mitigate this potential risk. Consistent with FDA guidance, we allow for remote patient monitoring and remote testing, when reasonably possible.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">31</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">To the best of our knowledge, our contract research and manufacturing partners continue to operate their facilities at or near normal levels, though staffing constraints and sourcing of raw and other materials have been an increasing challenge for our vendors. If staffing and/or material sourcing challenges continue, we may experience associated delays in our laboratory, clinical or manufacturing services. We believe we currently have appropriate service support and sufficient inventory of UpRi, XMT-1660 and XMT-2056 to support our ongoing and planned clinical trials. We have planned research, clinical and manufacturing activities to address all currently anticipated future needs. We continue to monitor the research, clinical and manufacturing operations of our vendors.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The ultimate impact of the COVID-19 pandemic on our business operations is highly uncertain and subject to change and will depend on future developments, which cannot be accurately predicted. While the pandemic did not materially affect our financial results and business operations in the third quarter ended September&#160;30, 2022, we are unable to predict the impact that COVID-19 will have on our financial position and operating results in future periods due to numerous uncertainties. Management continues to actively monitor the situation and the possible effects on our financial condition, operations, suppliers, vendors, our workforce and the overall industry. For additional information about risks and uncertainties related to the COVID-19 pandemic that may impact our business, our financial condition or our results of operations, see Part II, Item 1A. Risk Factors below.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Financial Operations Overview</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Revenue</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">To date, we have not generated any revenue from the sale of products. All of our revenue has been generated from strategic partnerships.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In August 2022, we entered into an agreement with GSK, or the GSK Agreement, to provide GSK with an exclusive option to obtain an exclusive license to co-develop and to commercialize products containing XMT-2056, or Licensed Products. We are responsible for manufacturing, research and early clinical development related to our XMT-2056 program prior to GSK's exercise, if any, of its option. If GSK exercises its option, GSK will have the exclusive right to and will be responsible for the further development and commercialization of Licensed Products. During the three and nine months ended September&#160;30, 2022, we recognized $0.7&#160;million of collaboration revenue related to the GSK Agreement.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In February 2022, we entered into an agreement with Janssen, or the Janssen Agreement, for the development and commercialization of ADC product candidates utilizing our Dolasynthen platform for up to three target antigens. Janssen is responsible for generating antibodies against the target antigens, and we are responsible for performing bioconjugation activities to create ADCs as well as certain chemistry, manufacturing and controls development and early-stage manufacturing activities. Janssen has the exclusive right to and is responsible for the further development and commercialization of these ADC product candidates. During the three and nine months ended September&#160;30, 2022, we recognized $4.9&#160;million and $10.9&#160;million, respectively, of collaboration revenue related to the Janssen Agreement. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In June 2014, we entered into an agreement with Merck KGaA, or the Merck KGaA Agreement, for the development and commercialization of ADC product candidates utilizing Fleximer for up to six target antigens. Merck KGaA is responsible for generating antibodies against the target antigens and we are responsible for generating Fleximer and our proprietary payloads and conjugating this to the antibody to create the ADC product candidates. Merck KGaA has the exclusive right to and is responsible for the further development and commercialization of these ADC product candidates. In May 2018, we entered into a supply agreement with Merck KGaA for the supply of materials that could be used for investigational new drug, or IND, -enabling studies and clinical trials. For each of the three and nine months ended September&#160;30, 2022 and 2021, we recognized an immaterial amount of revenue related to the Merck KGaA Agreements.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During the nine months ended September&#160;30, 2022, we recognized $0.3 million of revenue related to services provided to Asana BioSciences, LLC, or Asana Biosciences.  We did not recognize revenue related to Asana </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">32</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Biosciences during the three months ended September&#160;30, 2022 or during the three and nine months ended September&#160;30, 2021.</span></div><div style="margin-bottom:12pt"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">For the foreseeable future, we expect substantially all of our revenue to be generated from our collaboration agreements with GSK, Janssen, Merck KGaA and Asana BioSciences. Given the uncertain nature and timing of clinical development, we cannot predict when or whether we will receive further milestone payments or any royalty payments under these collaborations.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Expenses</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Research and development expenses</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Research and development expenses include our drug discovery efforts, manufacturing, and the development of our product candidates, which consist of:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">employee-related expenses, including salaries, benefits and stock-based compensation expense;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">costs of funding research and development performed by third parties that conduct research, preclinical activities, manufacturing and clinical trials on our behalf;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">laboratory supplies;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">facility costs, including rent, depreciation and maintenance expenses; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">upfront and milestone payments under our third-party licensing agreements.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Research and development costs are expensed as incurred. Costs of certain activities, such as manufacturing, preclinical studies and clinical trials, are generally recognized based on an evaluation of the progress to completion of specific tasks. Costs for certain development activities, such as clinical trials, are recognized based on an evaluation of the progress to completion of specific tasks using data such as patient enrollment, clinical site activations and information provided to us by the third parties with whom we contract.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Research and development activities are central to our business model. Product candidates in later stages of clinical development generally have higher development costs than those in earlier stages of clinical development, primarily due to the increased size and duration of later-stage clinical trials and manufacturing costs. We expect that our future research and development costs will continue to increase over current levels, depending on the progress of our clinical development programs. There are numerous factors associated with the successful development and commercialization of any of our product candidates, including future trial design and various regulatory requirements, many of which cannot be determined with accuracy at our current stage of development. Additionally, future commercial and regulatory factors beyond our control may impact our clinical development programs and plans.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We have not historically allocated all of our internal research and development expenses on a program-by-program basis as our employees and other resources are deployed across multiple projects under development. Internal research and development expenses are presented as one total. Our internal research and development costs are primarily personnel-related costs, stock-based compensation costs, and facility costs, including depreciation and lab consumables. </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">33</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We incur significant external costs for manufacturing our product candidates and platforms and for clinical research organizations that conduct clinical trials on our behalf. We capture these external expenses for each product candidate in clinical development. Costs for our platforms with an associated product candidate in clinical development are typically allocated to our most clinically advanced product candidate based on that platform. In light of our decision to discontinue further clinical development of XMT-1592 in the second quarter of 2022, all costs associated with our Dolasynthen platform have been re-allocated to XMT-1660, which is now our lead Dolasynthen-based product candidate. All external research and development expenses not attributable to our product candidates in clinical development are captured within preclinical and discovery costs. These costs relate to our product candidates XMT-2068 and XMT-2175 and additional earlier discovery stage programs and certain unallocated costs. The following table summarizes our external research and development expenses, presented by program as described above, for each of the three and nine month periods ended September 30, 2022 and 2021.</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:45.534%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.720%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.601%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.720%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.441%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.720%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.441%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:11.723%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three Months Ended<br/>September 30,</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended<br/>September 30,</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in&#160;thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">UpRi external costs</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">23,999&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">14,688&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">48,023&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">34,736&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">XMT-1592 external costs</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">409&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2,905&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3,198&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">7,049&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">XMT-1660 external costs</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">4,158&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">10,879&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">XMT-2056 external costs</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2,334&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2,334&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Preclinical and discovery costs</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2,040&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">5,220&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">13,265&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">17,079&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Internal research and development costs</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">17,699&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">12,462&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">49,977&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">35,781&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total research and development costs</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">50,639&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">35,275&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">127,676&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">94,645&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The successful development of our product candidates is highly uncertain. As such, we cannot reasonably estimate or know the nature, timing and estimated costs of the efforts that will be necessary to complete the remainder of the development of our product candidates. We are also unable to predict when, if ever, we will generate revenue from commercialization and sale of any of our product candidates that obtain regulatory approval. This is due to the numerous risks and uncertainties associated with developing drugs, including the uncertainty of:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">successful completion of preclinical studies and IND-enabling studies;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">successful enrollment in and completion of clinical trials;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">receipt of marketing approvals from applicable regulatory authorities;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">establishing commercial manufacturing capabilities or making arrangements with third-party manufacturers;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">obtaining and maintaining patent and trade secret protection and regulatory exclusivity for our product candidates;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">commercializing the product candidates, if and when approved, whether alone or in collaboration with others; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">continued acceptable safety profile of the drugs following approval.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">A change in the outcome of any of these variables with respect to the development, manufacture or commercialization of any of our product candidates would significantly change the costs, timing and viability associated with the development of that product candidate.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We expect our research and development expenses to increase as we continue our clinical development of UpRi, XMT-1660 and XMT-2056, advance our preclinical pipeline and invest in improvements in our ADC technologies.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">34</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">General and administrative expenses</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">General and administrative expenses consist primarily of salaries and other employee-related costs, including stock-based compensation, for personnel in executive, finance, accounting, business development, legal operations, information technology and human resources functions. Other significant costs include facility costs not otherwise included in research and development expenses, legal fees relating to patent and corporate matters and fees for accounting and consulting services.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We expect our general and administrative expenses to increase in the future to support continued research and development activities, including increased costs related to the hiring of additional personnel, fees to outside consultants and patent costs, among other expenses.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Other income (expense)</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Other income (expense) consists primarily of interest expense related to borrowings under our credit facility and associated amortization of the deferred financing costs and the accretion of debt discount. Interest income includes interest earned on cash equivalents. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Results of Operations</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Comparison of the three months ended September&#160;30, 2022 and 2021</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table summarizes our results of operations for the three months ended September&#160;30, 2022 and 2021, together with the changes in those items:</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:55.470%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.842%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.601%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.842%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.601%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.844%"></td><td style="width:0.1%"></td></tr><tr style="height:21pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three Months Ended<br/>September 30,</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" rowspan="2" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Dollar&#160;Change</span></td></tr><tr style="height:12pt"><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Collaboration revenue</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">5,573&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">11&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">5,562&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Operating expenses:</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Research and development</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">50,639&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">35,275&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">15,364&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">General and administrative</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">14,573&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">10,124&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">4,449&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total operating expenses</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">65,212&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">45,399&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">19,813&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Other income (expense):</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Interest income</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">708&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">15&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">693&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Interest expense</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(880)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(98)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(782)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total other income (expense), net</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(172)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(83)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(89)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Net loss</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(59,811)</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(45,471)</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(14,340)</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Collaboration Revenue</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Collaboration revenue increased by $5.6 million during the three months ended September&#160;30, 2022 when compared to the three months ended September&#160;30, 2021, primarily due to $4.9 million of collaboration revenue recognized under the Janssen Agreement.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Research and Development Expense</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Research and development expense increased by $15.4 million, from $35.3 million for the three months ended September&#160;30, 2021 to $50.6 million for the three months ended September&#160;30, 2022.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">35</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The increase in research and development expense was primarily attributable to the following:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">an increase of $9.4&#160;million related to manufacturing and clinical development activities for UpRi;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">an increase of $4.2&#160;million related to employee compensation (excluding stock-based compensation), primarily due to an increase in headcount supporting the growth of our research and development activities;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">an increase of $1.1&#160;million related to manufacturing and development activities for XMT-2056;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">an increase of $1.0&#160;million related to consulting and professional fees; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">an increase of $0.7&#160;million related to clinical development activities for XMT-1660.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">These increased costs were partially offset by a decrease of $1.4&#160;million related to manufacturing activities for XMT-1660.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Stock-based compensation expense included in research and development expenses increased by $0.3&#160;million, primarily as a result of increased headcount.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">General and Administrative Expense</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">General and administrative expense increased by $4.4 million from $10.1 million during the three months ended September&#160;30, 2021 to $14.6 million during the three months ended September&#160;30, 2022. The increase in general and administrative expense was primarily attributable to an increase of $2.7&#160;million related to consulting and professional fees and an increase of $1.6&#160;million related to employee compensation (excluding stock-based compensation), related to an increase in headcount. Stock-based compensation increased $0.2&#160;million also primarily as a result of increased headcount.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Total Other Income (Expense), net</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Total other income (expense), net was ($0.2) million and ($0.1) million for the three months ended September&#160;30, 2022 and 2021, respectively. The increase was primarily due to interest expense related to borrowings under the New Credit Facility, as defined below.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">36</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Comparison of the nine months ended September&#160;30, 2022 and 2021</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table summarizes our results of operations for the nine months ended September&#160;30, 2022 and 2021:</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:55.470%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.842%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.601%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.842%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.601%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.844%"></td><td style="width:0.1%"></td></tr><tr style="height:21pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended<br/>September 30,</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" rowspan="2" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Dollar&#160;Change</span></td></tr><tr style="height:12pt"><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Collaboration revenue</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">11,893&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">32&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">11,861&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Operating expenses:</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Research and development</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">127,676&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">94,645&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">33,031&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">General and administrative</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">42,158&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">26,214&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">15,944&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total operating expenses</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">169,834&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">120,859&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">48,975&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Other income (expense):</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Interest income</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">1,017&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">36&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">981&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Interest expense</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(2,364)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(286)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(2,078)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total other income (expense), net</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(1,347)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(250)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(1,097)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Net income (loss)</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(159,288)</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(121,077)</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(38,211)</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Collaboration Revenue</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Collaboration revenue increased by $11.9&#160;million during the nine months ended September&#160;30, 2022 when compared to the nine months ended September&#160;30, 2021,  primarily due to $10.9 million of collaboration revenue recognized under the Janssen Agreement.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Research and Development Expense</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Research and development expense increased by $33.0 million, from $94.6 million for the nine months ended September&#160;30, 2021 to $127.7 million for the nine months ended September&#160;30, 2022.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The increase in research and development expense was primarily attributable to the following:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">an increase of $14.3&#160;million related to manufacturing and clinical development activities for UpRi;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">an increase of $10.6&#160;million related to employee compensation (excluding stock-based compensation), primarily due to an increase in headcount supporting the growth of our research and development activities;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">an increase of $2.5&#160;million related to manufacturing and development activities for XMT-2056;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">an increase of $1.9 million related to clinical development activities for XMT-1660;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">an increase of $1.7&#160;million related to manufacturing activities for XMT-1660 and the Dolasynthen platform; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">an increase of $0.9&#160;million related to consulting and professional fees.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Stock-based compensation expense included in research and development expenses increased by $1.2&#160;million, primarily as a result of increased headcount.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">37</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">General and Administrative Expense</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">General and administrative expense increased by $15.9 million from $26.2 million during the nine months ended September&#160;30, 2021 to $42.2 million during the nine months ended September&#160;30, 2022. The increase in general and administrative expense was primarily attributable to an increase of $9.1&#160;million related to consulting and professional fees and an increase of $5.3&#160;million related to employee compensation (excluding stock-based compensation), related to an increase in headcount. Stock-based compensation increased $1.5&#160;million also primarily as a result of increased headcount.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Total Other Income (Expense), net</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Total other income (expense), net was ($1.3) million and ($0.3) million for the nine months ended September&#160;30, 2022 and 2021, respectively. The increase was primarily due to interest expense related to borrowings under the New Credit Facility.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Liquidity and Capital Resources </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Sources of Liquidity</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We have financed our operations to date primarily through our strategic partnerships, private placements of our convertible preferred stock and public offerings of our common stock, including our initial public offering, our follow-on public offerings in 2019 and 2020 and our ATM equity offering programs. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In May 2020, we established an ATM equity offering program, the 2020 ATM, pursuant to which we were able to offer and sell up to $100.0 million of our common stock from time to time at prevailing market prices. During the year ended December 31, 2021, we sold approximately 4.0 million shares of common stock under the 2020 ATM, resulting in net proceeds of $43.1 million. During the nine months ended September 30, 2022, we sold approximately 11.7 million shares of common stock under the 2020 ATM, resulting in net proceeds of $54.8 million. As of September 30, 2022, there are no amounts remaining unsold and available for sale under the 2020 ATM.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In February 2022, we entered into a new common stock sales agreement with Cowen and Company, LLC, or Cowen, under which we are able to offer and sell up to $100.0&#160;million of our common stock from time to time at prevailing market prices through Cowen, or the 2022 ATM. During the nine months ended September 30, 2022, we sold approximately 12.7 million shares of common stock under the 2022 ATM, resulting in net proceeds of $56.5 million. Approximately $42.4&#160;million remained unsold and available for sale under the 2022 ATM as of September&#160;30, 2022.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">On May 8, 2019, we entered into a loan and security agreement, or the Prior Credit Facility, with Silicon Valley Bank, or SVB, which was subsequently amended on June 29, 2019, August 28, 2020 and August 27, 2021. On October 29, 2021, we entered into a loan and security agreement, or the New Credit Facility, with Oxford Finance LLC as the collateral agent and a lender, and SVB as a lender, or together the Lenders. The New Credit Facility, as amended on February 17, 2022, provided in aggregate up to $100 million in credit, which included $60 million available in up to three principal advances through December 31, 2022, $20 million in one tranche that is subject to meeting certain development milestones, and an additional tranche of $20 million that is subject to conditional approval from the Lenders. Upon the closing date, we drew $25 million from the facility, of which $5.5 million was used to repay in full the existing balance and satisfy our existing obligations to SVB under the Prior Credit Facility. The New Credit Facility is secured by substantially all of our personal property owned or later acquired, excluding intellectual property (but including the right to payments and proceeds of intellectual property), and a negative pledge on intellectual property, which ensures that the Lenders' rights to repayment would be senior to the rights of the holders of our common stock in the event of liquidation. Upon entering into the New Credit Facility, we terminated all commitments by SVB to extend further credit under the Prior Credit Facility and all guarantees and security interests granted by us to SVB under the Prior Credit Facility.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">38</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of September&#160;30, 2022, we had cash, cash equivalents and marketable securities of $290.1 million. In addition to our existing cash,  cash equivalents and marketable securities, we are eligible to earn milestone and other payments under our collaboration agreements with GSK, Janssen, Merck KGaA and Asana Biosciences. Our ability to earn the milestone payments and the timing of earning these amounts are dependent upon the timing and outcome of our development, regulatory and commercial activities and, as such, are uncertain at this time.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Cash Flows</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table provides information regarding our cash flows for the nine months ended September&#160;30, 2022 and 2021:</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:70.214%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.842%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.601%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.843%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended<br/>September 30,</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Net cash provided by (used in) operating activities</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">1,866&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(97,588)</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Net cash used in investing activities</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(107,290)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(493)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Net cash provided by financing activities</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">111,559&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">34,851&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Increase (decrease) in cash, cash equivalents and restricted cash</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">6,135&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(63,230)</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Net Cash Provided by (Used in) Operating Activities</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Net cash provided by operating activities was $1.9 million for the nine months ended September&#160;30, 2022 and primarily consisted of a net loss of $159.3 million adjusted for changes in our net working capital and $128.4 million in deferred revenue related to the GSK Agreement and Janssen Agreement, and other non-cash items including stock-based compensation of $16.2 million and depreciation of $0.6 million. Net cash used in operating activities was $97.6 million for the nine months ended September&#160;30, 2021 and primarily consisted of a net loss of $121.1 million adjusted for changes in our net working capital and other non-cash items including stock-based compensation of $13.5 million and depreciation of $0.6 million.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Net Cash Used in Investing Activities</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Net cash used in investing activities was $107.3 million during the nine months ended September&#160;30, 2022 as compared to $0.5 million during the nine months ended September&#160;30, 2021. During the nine months ended September&#160;30, 2022, net cash used in investing activities consisted primarily of purchases of marketable securities, partially offset by maturities of marketable securities. During the nine months ended September&#160;30, 2021, net cash used in investing activities consisted of purchases of equipment. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Net Cash Provided by Financing Activities</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Net cash provided by financing activities was $111.6 million during the nine months ended September&#160;30, 2022 as compared to $34.9 million during the nine months ended September&#160;30, 2021. During the nine months ended September&#160;30, 2022, net cash provided by financing activities consisted primarily of proceeds from the use of our 2020 ATM and 2022 ATM of $111.0 million. During the nine months ended September&#160;30, 2021, net cash provided by financing activities consisted primarily of proceeds from the use of our 2020 ATM of $33.3 million and from the exercise of stock options of $1.5 million, offset by $0.3 million from the payment of employee tax obligations related to vesting of restricted stock units.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Funding Requirements</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We expect our cash expenditures to increase in connection with our ongoing activities, particularly as we continue the research and development of, initiate clinical trials of and seek marketing approval for our product candidates. In addition, if we obtain marketing approval for any of our product candidates, we expect to incur significant commercialization expenses related to drug sales, marketing, manufacturing and distribution to the extent that such sales, marketing, manufacturing and distribution are not the responsibility of potential collaborators. </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">39</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of September&#160;30, 2022, we had cash, cash equivalents and marketable securities of $290.1 million. In addition, we currently have the option to borrow $35 million under the New Credit Facility. We believe our currently available funds will be sufficient to fund our current operating plan commitments into the first half of 2024. Our forecast of the period of time through which our financial resources will be adequate to support our operations is a forward-looking statement and involves risks and uncertainties, and actual results could vary as a result of a number of factors. We have based this estimate on assumptions that may prove to be wrong, and we could utilize our available capital resources sooner than we currently expect. Our future capital requirements will depend on many factors, including:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the scope, progress, results and costs of drug discovery, preclinical development, laboratory testing and clinical trials for our product candidates;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the scope, prioritization and number of our research and development programs;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the costs, timing and outcome of regulatory review of our product candidates;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">our ability to establish and maintain collaborations on favorable terms, if at all;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the achievement of milestones or occurrence of other developments that trigger payments under any collaboration agreements we obtain;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the extent to which we are obligated to reimburse, or entitled to reimbursement of, clinical trial costs under future collaboration agreements, if any;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the costs of preparing, filing and prosecuting patent applications, maintaining and enforcing our intellectual property rights and defending intellectual property-related claims;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the extent to which we acquire or in-license other product candidates and technologies;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the costs of securing manufacturing arrangements for clinical and commercial production; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the costs of establishing or contracting for sales and marketing capabilities if we obtain regulatory approvals to market our product candidates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Identifying potential product candidates and conducting preclinical testing and clinical trials is a time-consuming, expensive and uncertain process that takes many years to complete, and we may never generate the necessary data or results required to obtain marketing approval and achieve drug sales. In addition, our product candidates, if approved, may not achieve commercial success. Our commercial revenues, if any, will be derived from sales of drugs that we do not expect to be commercially available for many years, if at all. Accordingly, we will need to continue to rely on additional financing to achieve our business objectives. Adequate additional financing may not be available to us on acceptable terms, or at all.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Until such time, if ever, as we can generate substantial product revenues, we expect to finance our cash needs through a combination of equity offerings, debt financings, strategic partnerships and licensing arrangements. To the extent that we raise additional capital through the sale of equity or convertible debt securities, the ownership interests of our common stockholders will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect the rights of our common stockholders. We currently have access to the New Credit Facility, as described above, along with funds to potentially be earned in connection with our agreements with GSK, Janssen, Merck KGaA and Asana BioSciences, if research and development activities are successful under those agreements. Future additional debt financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">40</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">If we raise funds through additional strategic partnerships or licensing arrangements with third parties, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs or product candidates or to grant licenses on terms that may not be favorable to us. If we are unable to raise additional funds through equity or debt financings when needed, we may be required to delay, limit, reduce or terminate our drug development or future commercialization efforts or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Contractual Obligations</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">There were no material changes to our contractual obligations as reported in our Annual Report on Form 10-K for the year ended December 31, 2021, which was filed with the SEC on February 28, 2022.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Critical Accounting Estimates</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our management's discussion and analysis of our financial condition and results of operations are based on our financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles. The preparation of these financial statements requires us to make judgments and estimates that affect the reported amounts of assets, liabilities, revenues, and expenses and the disclosure of contingent assets and liabilities in our financial statements. We base our estimates on historical experience, known trends and events, and various other factors that are believed to be reasonable under the circumstances. Actual results may differ from these estimates under different assumptions or conditions. On an ongoing basis, we evaluate our judgments and estimates in light of changes in circumstances, facts and experience. The effects of material revisions in estimates, if any, will be reflected in the financial statements prospectively from the date of change in estimates. There were no material changes to our critical accounting estimates as reported under the heading &#8220;Critical Accounting Policies and Significant Judgements and Estimates&#8221; in Part II, Item 7. Management&#8217;s Discussion and Analysis of Financial Conditions and Results of Operations in our Annual Report on Form 10-K for the year ended December&#160;31, 2021, which was filed with the SEC on February 28, 2022.</span></div><div style="margin-bottom:12pt"><span><br/></span></div><div id="i036c42b7cd7942de8867eb61947b1b1c_79"></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Item&#160;3.&#160;Quantitative and Qualitative Disclosures About Market Risk</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Interest Rate Risks</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We are exposed to market risk related to changes in interest rates. Our primary exposure to market risk is interest rate sensitivity, which is affected by changes in the general level of U.S. interest rates, particularly because our investments, including cash equivalents and marketable securities are invested in U.S. Treasury obligations, commercial paper and corporate bonds. However, we believe that due to the short-term duration of our investment portfolio and low-risk profile of our investments, an immediate 100 basis points change in the prime rate would not have a material effect on the fair market value of our investments portfolio.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The interest rate on our New Credit Facility is sensitive to changes in interest rates. Interest accrues on borrowings under the credit facility at a floating rate equal to the greater of (i) 8.50% and (ii) the prime rate plus 5.25%. We do not currently engage in any hedging activities against changes in interest rates. As of September&#160;30, 2022, there was $25.0 million outstanding under the New Credit Facility, and a potential change in the associated interest rates would be immaterial to the results of our operations.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Foreign Currency Exchange Rate Risks</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We are currently not exposed to market risk related to changes in foreign currency exchange rates, but we may contract with vendors that are located in Asia and Europe and may be subject to fluctuations in foreign currency rates at that time.</span></div><div style="margin-bottom:12pt"><span><br/></span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">41</span></div></div></div><div id="i036c42b7cd7942de8867eb61947b1b1c_82"></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Item&#160;4.&#160;Controls and Procedures</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Management&#8217;s Evaluation of our Disclosure Controls and Procedures</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We maintain &#8220;disclosure controls and procedures,&#8221; as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended, or the Exchange Act, that are designed to ensure that information required to be disclosed in the reports that we file or submit under the Exchange Act is (i) recorded, processed, summarized and reported within the time periods specified in the SEC&#8217;s rules and forms and (ii) accumulated and communicated to our management, including our principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure. Our management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and our management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our management, with the participation of our principal executive officer and principal financial officer, has evaluated the effectiveness of our disclosure controls and procedures as of September&#160;30, 2022, the end of the period covered by this Quarterly Report on Form 10-Q. Based upon such evaluation, our principal executive officer and principal financial officer have concluded that our disclosure controls and procedures were effective at the reasonable assurance level as of such date.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Changes in Internal Control over Financial Reporting</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">No change in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) occurred during the quarter ended September&#160;30, 2022 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">42</span></div></div></div><div id="i036c42b7cd7942de8867eb61947b1b1c_85"></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">PART&#160;II&#160;- OTHER INFORMATION</span></div><div id="i036c42b7cd7942de8867eb61947b1b1c_88"></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Item&#160;1.&#160;Legal Proceedings</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">From time to time, we may become subject to various legal proceedings and claims that arise in the ordinary course of our business activities. We are not currently party to any material legal proceedings. Although the results of litigation and claims cannot be predicted with certainty, as of the date of this Quarterly Report on Form 10-Q, we do not believe we are party to any claim or litigation, the outcome of which, if determined adversely to us, would individually or in the aggregate be reasonably expected to have a material adverse effect on our business.</span></div><div style="margin-bottom:12pt"><span><br/></span></div><div id="i036c42b7cd7942de8867eb61947b1b1c_91"></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Item 1A. Risk Factors</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Our operations and financial results are subject to various risks and uncertainties, including those described below. The following information about these risks and uncertainties, together with the other information appearing elsewhere in this Quarterly Report on Form 10-Q, and our 2021 Annual Report on Form 10-K, filed with the Securities and Exchange Commission, or SEC, on February 28, 2022, including our consolidated financial statements and related notes thereto, should be carefully considered before any decision to invest in our common stock. The risks and uncertainties described below are not the only ones we face. Additional risks and uncertainties not presently known to us or that we currently believe to be immaterial may also adversely affect our business or cause our actual results to differ materially from those contained in forward-looking statements we have made in this report and those we may make from time to time. If any of the following risks occur, our business, financial condition, results of operations and future growth prospects could be materially and adversely affected. We cannot provide assurance that any of the events discussed below will not occur.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Risks Related to Development and Approval of Our ADC Product Candidates</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Failure of a discovery program or product candidate may occur at any stage of preclinical or clinical development, and, because our and our partners' discovery programs and our product candidates are in early stages of preclinical or clinical development, there is a high risk of failure. We or our partners may never succeed in obtaining regulatory approval and generating revenue from such discovery programs or product candidates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our early clinical results for UpRi (upifitamab rilsodotin), our lead product candidate, and the early results from preclinical studies or clinical trials of any other current or future product candidates are not necessarily predictive of the results from our ongoing or future discovery programs, preclinical studies or clinical trials. Promising results in preclinical studies and early encouraging clinical results of a drug candidate may not be predictive of similar results in later-stage preclinical studies or in humans during clinical trials. Many companies in the pharmaceutical and biotechnology industries have suffered significant setbacks in clinical trials after achieving positive results in earlier stages of clinical development, and we cannot be certain that we will not face similar setbacks. These companies&#8217; setbacks have been caused by, among other things, preclinical findings made while clinical trials were underway or safety or efficacy events in preclinical or clinical trials, including previously unreported adverse events. Similarly, the design of a clinical trial can determine whether its results will support approval of a product, and flaws in the design of a clinical trial may not become apparent until the clinical trial is well advanced.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Any clinical trials that we may conduct may not demonstrate the efficacy and safety necessary to obtain regulatory approval to market our product candidates. In addition, clinical trial results for one of our product candidates, or for competitor products utilizing similar technology, may raise concerns about the safety or efficacy of other product candidates in our pipeline. If the results of our ongoing or future clinical trials are inconclusive with respect to the efficacy of our product candidates, if we do not meet the clinical endpoints with statistical significance or if there are safety concerns or adverse events associated with our product candidates, we may be prevented from or delayed in obtaining marketing approval for our product candidates. For example, patients in our ongoing clinical trials of UpRi have experienced serious adverse events, or SAEs, including, without limitation, death, pneumonitis, renal impairment, abdominal pain, fatigue, vomiting, sepsis and pyrexia. We expect that certain patients in ongoing and future clinical trials will experience additional SAEs, including those that may result in death, as our product candidates progress through clinical development.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">43</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">There can be significant variability in safety or efficacy results between different clinical trials of the same product candidate due to numerous factors, including changes in trial procedures set forth in protocols, differences in the size and type of the patient populations, changes in and adherence to the dosing regimen and other clinical trial protocols and the rate of dropout among clinical trial participants. Moreover, preclinical and clinical data are often susceptible to varying interpretations and analyses, and many companies that believed their product candidates performed satisfactorily in preclinical studies and clinical trials have nonetheless failed to obtain U.S. Food and Drug Administration, or FDA, approval. Even if we or our collaborators believe that the results of clinical trials of our product candidates warrant marketing approval, the FDA or comparable foreign regulatory authorities may disagree and may not grant marketing approval of our product candidates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Alternatively, even if we obtain regulatory approval, that approval may be for indications or patient populations that are not as broad as intended or desired or may require labeling that includes significant use or distribution restrictions or safety warnings. We may also be required to perform additional or unanticipated clinical trials to obtain approval or be subject to additional post-marketing testing requirements to maintain regulatory approval. In addition, regulatory authorities may withdraw their approval of a product or impose restrictions on its distribution, such as in the form of a risk evaluation and mitigation strategy, or REMS, program. The failure to obtain timely regulatory approval of product candidates, any product marketing limitations or a product withdrawal would negatively impact our business, results of operations and financial condition.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Preliminary, interim and top-line data from our clinical trials that we announce or publish from time to time may change as more patient data become available and are subject to audit and verification procedures that could result in material changes in the final data.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">From time to time, we may announce or publish preliminary, interim or top-line data from our clinical trials. Positive preliminary data may not be predictive of such trial&#8217;s subsequent or overall results. Interim data from clinical trials that we may complete do not necessarily predict final results and are subject to the risk that one or more of the clinical outcomes may materially change as patient enrollment continues and more patient data become available. For example, we have reported interim data from our ongoing Phase 1b/2 clinical trial of UpRi, but we have not yet reported final data from the trial. Preliminary or top-line data also remain subject to audit and verification procedures that may result in the final data being materially different from the preliminary or top-line data we may publish. As a result, preliminary, interim and top-line data should be viewed with caution until the final data are available. Adverse differences between preliminary or interim data and final data could significantly harm our business prospects.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We currently have a limited number of ADC product candidates in current or planned clinical trials. A failure of any of our product candidates in clinical development would adversely affect our business and may require us to discontinue development of other ADC product candidates based on the same technology.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">UpRi and XMT-1660 are currently our only product candidates in clinical trials, and we expect  to initiate a clinical trial of XMT-2056.  While we have certain other preclinical programs in development, it will take additional investment and time, and regulatory clearance, for such programs to reach the clinical stage of development. In addition, we have other product candidates in our current pipeline that are based on the same platforms as UpRi,  , XMT-1660 and XMT-2056. If a product candidate fails in development as a result of any underlying problem with our platforms, then we may be required to discontinue development of the product candidates that are based on the same technologies. If we were required to discontinue development of UpRi, XMT-1660, XMT-2056 or any other current or future product candidate, or if UpRi, XMT-1660 or XMT-2056 or any other current or future product candidate were to fail to receive regulatory approval or were to fail to achieve sufficient market acceptance, we could be prevented from or significantly delayed in achieving profitability.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Events that may delay or prevent successful commencement, enrollment or completion of clinical trials of our product candidates could result in increased costs to us as well as a delay in obtaining, or failure to obtain, regulatory approval, or cause us to suspend or terminate a clinical trial, which could prevent us from commercializing our product candidates on a timely basis, or at all.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">44</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We cannot guarantee that clinical trials, including our ongoing and future anticipated additional clinical trials of UpRi, our lead product candidate, XMT-1660, XMT-2056 or any of our other current or future product candidates, will be conducted as planned or completed on schedule, if at all. A failure of one or more clinical trials can occur at any stage of testing, and other events may cause us to temporarily or permanently cease a clinical trial. Events that may prevent successful or timely commencement, enrollment or completion of clinical development include, among others:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">delays in reaching a consensus with regulatory agencies on trial design;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">delays in reaching, or failing to reach, agreement on acceptable terms with prospective clinical research organizations, or CROs, and clinical trial sites;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">difficulties in obtaining required Institutional Review Board, or IRB, or Ethics Committee, or EC, approval at each clinical trial site;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">challenges in recruiting and enrolling suitable patients to participate in clinical trials that meet the criteria of the protocol for the clinical trial;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">imposition of a clinical hold by regulatory agencies, IRBs or ECs for any reason, including safety concerns or after an inspection of clinical operations or trial sites;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">delays in necessary screenings caused by third parties with which we or any of our vendors or suppliers contract;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">failure by CROs, other third parties or us to adhere to clinical trial requirements;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">failure to perform in accordance with the FDA&#8217;s good clinical practices, or GCP, or applicable regulatory guidelines in other countries;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">inadequate quantity or quality of a product candidate or other materials necessary to conduct clinical trials, including, for example, delays in the testing, validation, manufacturing or delivery of the product candidates to the clinical sites;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">patients not completing participation in a trial or not returning for post-treatment follow-up, including as a result of the ongoing COVID-19 pandemic;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">expected or unexpected safety issues, including occurrence of SAEs, associated with any product candidate in clinical trials that are viewed as outweighing the product candidate&#8217;s potential benefits or reports that may arise from preclinical or clinical testing of other similar cancer therapies that raise safety or efficacy concerns about our product candidates;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">changes in regulatory requirements or guidance that require amending or submitting new clinical protocols or submitting additional data;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">lack of adequate funding to continue one or more clinical trials; or</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">geopolitical or other events, including the ongoing COVID-19 pandemic and the current conflict between Russia and Ukraine, that unexpectedly disrupt, delay or generally interfere in regional or worldwide operations of our clinical trial sites or CROs or other operations applicable to the conduct of relevant development activities.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Delays, including delays caused by the above factors, can be costly and could negatively affect our ability to commence, enroll or complete our current and anticipated clinical trials. If we or our partners are not able to </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">45</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">successfully complete clinical trials, we or they will not be able to obtain regulatory approval and will not be able to commercialize our product candidates or our partners&#8217; product candidates based on our technology.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">An inability to enroll sufficient numbers of patients in our clinical trials could result in increased costs and longer development periods for our product candidates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Clinical trials require sufficient patient enrollment, which is a function of many factors, including:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the size and nature of the patient population;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the severity of the disease under investigation;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the nature and complexity of the trial protocol, including eligibility criteria for the trial;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the design of the trial;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the number of clinical trial sites and the proximity of patients to those sites;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the standard of care in the diseases under investigation;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the ability and commitment of clinical investigators to identify eligible patients;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">clinicians&#8217; and patients&#8217; perceptions of the potential advantages and risks of the drug being studied in relation to other available therapies, including any new drugs that may be approved for the indications we are investigating;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the risk that patients enrolled in clinical trials will drop out of the trials before completion or, because they are late-stage cancer patients, that they will not survive the full terms of the clinical trials;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the ability of our clinical trial sites to continue key activities, such as clinical trial site data monitoring and patient visits, due to factors related to the ongoing COVID-19 pandemic or other worldwide events; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the risk that patients may be affected by COVID-19 or measures taken in response to the COVID-19 pandemic and may be unable to travel to our clinical trial sites.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In addition, our clinical trials will compete with other clinical trials for product candidates that are in the same therapeutic areas as our current and future product candidates. This competition will reduce the number and types of patients available to us, because some patients who might have opted to enroll in our trials may instead opt to enroll in a trial conducted by one of our competitors. Since the number of qualified clinical investigators is limited, we expect to conduct some of our clinical trials at the same clinical trial sites that some of our competitors use, which will reduce the number of patients who are available for our clinical trials at such sites. Moreover, because our current and future product candidates represent a departure from more commonly used methods for cancer treatment, potential patients and their doctors may be inclined to use conventional therapies, such as chemotherapy, rather than enroll patients in our ongoing or any future clinical trials.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Challenges in recruiting and enrolling suitable patients to participate in clinical trials that meet the criteria of the protocol could increase costs and result in delays to our current development plans for UpRi, our lead product candidate, XMT-1660, XMT-2056 or any other current or future product candidate.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Our product candidates or ADCs developed or commercialized by our competitors may cause undesirable side effects or have other properties that halt their clinical development, delay or prevent regulatory approval of our product candidates or limit their commercial potential.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">46</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Undesirable side effects caused by our product candidates or ADCs being developed or commercialized by our partners or competitors could cause us or regulatory authorities to interrupt, delay or halt clinical trials and could result in a more restrictive label, the denial of regulatory approval by the FDA or other regulatory authorities and potential product liability claims. Further, clinical trials by their nature utilize a sample of the potential patient population. With a limited number of subjects and limited duration of exposure, rare and severe side effects of our product candidates or those of our competitors may only be uncovered with a significantly larger number of patients exposed to the drug. SAEs, including death, deemed to be caused by our product candidates or those of our competitors, either before or after receipt of marketing approval, could have a material adverse effect on the development of our product candidates and our business as a whole.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Patients in our ongoing clinical trials have experienced SAEs, including, without limitation, death, pneumonitis, renal impairment, abdominal pain, fatigue, vomiting, sepsis and pyrexia. We expect that certain patients in ongoing and future trials will experience additional SAEs, including those that may result in death, as our product candidates progress through clinical development. These or additional undesirable side effects caused by our product candidates or those of our competitors, either before or after receipt of marketing approval, could result in a number of potentially significant negative consequences, including:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">our clinical trials may be put on hold;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">treatment-related side effects could affect patient recruitment for our clinical trials;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">we may be unable to obtain regulatory approval for our product candidates;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">regulatory authorities may withdraw or limit their approvals of our product candidates;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">regulatory authorities may require the addition of labeling statements, such as a contraindication, black box warnings or additional warnings;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the FDA may require development of a REMS with Elements to Assure Safe Use as a condition of approval or post-approval;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">we may decide to remove such product candidates from the marketplace;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">we may be subject to regulatory investigations and government enforcement actions;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">we could be sued and held liable for harm caused to patients; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">our reputation may suffer.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Any of these events could prevent us from achieving or maintaining market acceptance of our product candidates and could substantially increase commercialization costs.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We may choose not to develop a potential product candidate, or we may suspend or terminate one or more discovery or preclinical programs or product candidates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">At any time and for any reason, we may determine that one or more of our discovery programs, preclinical programs or product candidates does not have sufficient potential to warrant the allocation of resources toward such program or product candidate. Furthermore, because we have limited financial and personnel resources, we have placed significant focus on the development of our lead product candidate, UpRi, and a limited number of other product candidates, including XMT-1660 and XMT-2056 and historically including XMT-1592. Accordingly, we may choose not to develop a product candidate or elect to suspend or terminate one or more of our discovery or preclinical programs. If we suspend or terminate a program or product candidate in which we have invested significant resources, we will have expended resources on a program or product candidate that will not provide a full return on our investment. For example, in May 2022, we decided to discontinue  development of XMT-1592 based </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">47</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">in part on the lower prevalence of the NaPi2b biomarker in non-small cell lung cancer and the increasingly competitive nature of such indication.  We may also cease developing a product candidate for a particular indication. For example, in November 2021, we determined to cease developing UpRi as a single agent in patients with non-small cell lung cancer, or NSCLC, and determined to focus development on patients with ovarian cancer. As a result, we may have missed an opportunity to have allocated the resources originally used to develop UpRi as a single agent in patients with NSCLC and to develop XMT-1592 to potentially more productive uses, including existing or future programs or product candidates. If we do not accurately evaluate the commercial potential or target market for a particular future product candidate, we may relinquish valuable rights to future product candidates through collaboration, licensing or other royalty arrangements.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We or our partners may fail to discover and develop additional potential product candidates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our and our partners&#8217; research programs to identify new product candidates will require substantial technical, financial and human resources, and we or our partners may be unsuccessful in our or their efforts to identify new product candidates. If we or our partners are unable to identify suitable additional product candidates for preclinical and clinical development, our or their ability to develop product candidates and our ability to obtain revenues from commercializing our products or to receive royalties from our partners&#8217; sales of their products in future periods could be compromised, which could result in significant harm to our financial position and adversely impact our stock price.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Risks Related to our Financial Position and Need for Additional Capital</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We have incurred net losses since our inception, we have no products approved for commercial sale and we anticipate that we will continue to incur substantial operating losses for the foreseeable future. We may never achieve or sustain profitability.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We have incurred net losses since our inception. Our net loss was $59.8 million and $159.3 million, respectively, for the three and nine months ended September&#160;30, 2022, respectively. As of September&#160;30, 2022, we had an accumulated deficit of $609.8 million. Our losses have resulted principally from costs incurred in our discovery and development activities. Our net losses may fluctuate significantly from quarter to quarter and year to year. To date, we have not commercialized any products or generated any revenues from the sale of products, and we do not expect to generate any product revenues in the foreseeable future. Absent the realization of sufficient revenues from product sales, we may never achieve profitability in the future. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We have devoted most of our financial resources to research and development, including our clinical and preclinical development activities. To date, we have financed our operations primarily with the proceeds from our strategic partnerships, private placements of our preferred stock and public offerings of our common stock, including our initial public offering, our follow-on public offerings in 2019 and 2020 and our at-the-market, or ATM, equity offering programs. The amount of our future net losses will depend, in part, on the rate of our future expenditures. We have not completed pivotal clinical trials for any product candidate and only have only a limited number of  product candidates in current or planned clinical trials. It will be several years, if ever, before we have a product candidate ready for commercialization. Even if we obtain regulatory approval to market a product candidate, our future revenues would depend upon the size of the market or markets in which our product candidates received such approval and our ability to achieve sufficient market acceptance, reimbursement from third-party payors and adequate market share for our product candidates in those markets.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We expect to continue to incur significant expenses and operating losses over the next several years. We anticipate that our expenses will increase significantly in connection with our ongoing activities, as we:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">continue clinical development activities for our lead product candidate, UpRi, and XMT-1660 and prepare to initiate a planned clinical trial for XMT-2056;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">develop a diagnostic assay for the NaPi2b biomarker;</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">48</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">continue activities to discover, validate and develop additional product candidates;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">obtain marketing approvals for our current and future product candidates for which we complete clinical trials;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">develop a sustainable and scalable manufacturing process for our product candidates, including establishing and maintaining commercially viable supply and manufacturing relationships with third parties;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">address any competing technological and market developments;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">maintain, expand and protect our intellectual property portfolio; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">hire additional research, development and general and administrative personnel.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">If we are required by the FDA or any equivalent foreign regulatory authority to perform clinical trials or preclinical trials in addition to those we currently expect to conduct, or if there are any delays in completing the clinical trials of UpRi or any other current or future product candidates, our expenses could increase.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">To become and remain profitable, we must succeed in developing our product candidates, obtaining regulatory approval for them, and manufacturing, marketing and selling those products for which we may obtain regulatory approval. We may not succeed in these activities, and we may never generate revenue from product sales or strategic partnerships in an amount sufficient to achieve profitability. Even if we achieve profitability in the future, we may not be able to sustain profitability in subsequent periods. Our failure to become or remain profitable would depress our market value and could impair our ability to raise capital, expand our business, discover or develop other product candidates or continue our operations.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We have a credit facility that requires us to comply with certain affirmative and negative covenants and places restrictions on our operating and financial flexibility.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In October 2021, we entered into a Loan and Security Agreement, or the New Credit Facility, with Oxford Finance LLC as the collateral agent and a lender, and SVB as a lender, together, the Lenders. Pursuant to the New Credit Facility, as amended to date, we may borrow up to an aggregate of $100&#160;million, which includes $60&#160;million available in up to three principal advances through December 31, 2022, $20&#160;million in a tranche that is subject to meeting certain development milestones, and an additional tranche of $20&#160;million, which is subject to conditional approval from the Lenders. The New Credit Facility is secured by substantially all of our personal property owned or later acquired, excluding intellectual property (but including the right to payments and proceeds from intellectual property), and a negative pledge on intellectual property.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The New Credit Facility also includes customary representations and warranties, affirmative and negative covenants and conditions to drawdowns, as well as customary events of default. Certain of the customary negative covenants limit our ability, among other things, to incur future debt, grant liens, make investments, make acquisitions, distribute dividends, make certain restricted payments and sell assets, subject in each case to certain exceptions. Our failure to comply with these covenants would result in an event of default under the Loan and Security Agreement and could result in the acceleration of the obligations we owe pursuant to the New Credit Facility.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We will require substantial additional financing to achieve our goals, and a failure to obtain this necessary capital when needed could force us to delay, limit, reduce or terminate our product development or commercialization efforts.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our cash,  cash equivalents and marketable securities were 290.1 million as of September&#160;30, 2022. We have utilized substantial amounts of cash since our inception and expect that we will continue to expend substantial resources for the foreseeable future developing UpRi, XMT-1660, XMT-2056 and any other current or future product candidates. These expenditures may include costs associated with research and development, conducting preclinical studies and clinical trials, potentially obtaining regulatory approvals and manufacturing products, as well </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">49</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">as marketing and selling products approved for sale, if any, and potentially acquiring new technologies. In addition, other unanticipated costs may arise. Because the outcome of our planned and anticipated clinical trials is highly uncertain, we cannot reasonably estimate the actual amounts necessary to successfully complete the development and commercialization of our product candidates. Our costs will increase if we experience any delays in our clinical trials for UpRi or any other current or future product candidates, including delays in enrollment of patients. We also incur costs associated with operating as a public company, hiring additional personnel and expanding our facilities.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our future capital requirements depend on many factors, including:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the scope, progress, results and costs of researching and developing UpRi, XMT-1660, XMT-2056 and any other current or future product candidates and conducting preclinical studies and clinical trials;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the timing of, and the costs involved in, obtaining regulatory approvals for UpRi, XMT-1660, XMT-2056 and any other current or future product candidates if preclinical studies and clinical trials are successful;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the cost of manufacturing UpRi, XMT-1660, XMT-2056 and any other current or future product candidates for clinical trials in preparation for regulatory approval and in preparation for commercialization;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the cost of commercialization activities for UpRi, XMT-1660, XMT-2056 and any other current or future product candidates, if any product candidates are approved for sale, including manufacturing, marketing, sales and distribution costs;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">our ability to establish and maintain strategic partnerships, licensing or other arrangements and the financial terms of such agreements;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the costs involved in preparing, filing, prosecuting, maintaining, defending and enforcing patent claims, including litigation costs and the outcome of any such litigation;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the timing, receipt and amount of sales of, or royalties on, our future products, if any, or products developed by our partners;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the emergence of competing cancer therapies and other adverse market developments; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the requirement for or the cost of developing companion diagnostics and/or complementary diagnostics.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We currently have the option to borrow $35&#160;million under the New Credit Facility. We believe that our current cash,  cash equivalents and marketable securities plus the available borrowings under the New Credit Facility will be sufficient to fund our current operating plan commitments into the first half of 2024. However, we have based these estimates on assumptions that may prove to be wrong, and our operating plan may change as a result of many factors currently unknown to us and we may need additional funds sooner than planned. Additional funds may not be available when we need them on terms that are acceptable to us, or at all. Our ability to borrow funds under the New Credit Facility is subject to us complying with the applicable covenants at the time we request a drawdown. If adequate funds are not available to us on a timely basis, we may be required to delay, limit, reduce or terminate preclinical studies, clinical trials or other development activities for one or more of our product candidates or delay, limit, reduce or terminate our establishment of sales and marketing capabilities or other activities that may be necessary to commercialize our product candidates. Even if we believe we have sufficient funds for our current or future operating plans, we may seek additional capital due to favorable market conditions or strategic considerations.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Raising additional capital may cause dilution to our existing stockholders, restrict our operations or require us to relinquish rights to our technologies or ADC product candidates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Until such time, if ever, as we can generate substantial product revenues, we expect to finance our capital need through a variety of means, including through private and public equity offerings, debt financings, collaborations, strategic alliances and licensing arrangements. To the extent that we raise additional capital through the sale of </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">50</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">equity or convertible debt securities, the ownership interests of our common stockholders will be diluted, and the terms of such equity or convertible debt securities may include liquidation or other preferences that are senior to or otherwise adversely affect the rights of our common stockholders. Additional debt financing, if available, may involve agreements that include covenants limiting or restricting our ability to take certain actions, such as incurring future debt, making capital expenditures, declaring dividends or encumbering our assets to secure future indebtedness, each of which could adversely impact our ability to conduct our business and execute our operating plan. If we raise additional funds through strategic partnerships with third parties, we may have to relinquish valuable rights to our technologies, including our platforms, or product candidates, or grant licenses on terms that are not favorable to us. If we are unable to raise additional funds through equity or debt financing when needed, we may be required to delay, limit, reduce or terminate our product development or commercialization efforts for UpRi, XMT-1660, XMT-2056 or any other current or future product candidates or grant rights to third parties to develop and market product candidates that we would otherwise prefer to develop and market ourselves.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We may expend our resources to pursue a particular product candidate and fail to capitalize on product candidates that may be more profitable or for which there is a greater likelihood of success.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Because we have limited financial and managerial resources, we focus on specific product candidates. As a result, we may forgo or delay pursuit of opportunities with other product candidates that later prove to have greater commercial potential. Our resource allocation decisions may cause us to fail to capitalize on viable commercial products or profitable market opportunities. Failure to properly assess potential product candidates could result in our focus on product candidates with low market potential, which would harm our business and financial condition. Our spending on current and future research and development programs and product candidates for specific indications may not yield any commercially viable product candidates. If we do not accurately evaluate the commercial potential or target market for a particular product candidate, we may relinquish valuable rights to that product candidate through partnering, licensing or other royalty arrangements in cases in which it would have been more advantageous for us to retain sole development and commercialization rights to such product candidate.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Risks Related to Our Reliance on Third Parties</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Because we rely on third-party manufacturing and supply partners, our supply of research and development, preclinical and clinical development materials may become limited or interrupted or may not be of satisfactory quantity or quality.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We rely on third-party contract manufacturers to manufacture our preclinical and clinical trial product supplies, and we lack the internal resources and the capability to manufacture any product candidates on a clinical or commercial scale. The facilities used by our contract manufacturers to manufacture the active pharmaceutical ingredient and final drug product must be acceptable to the FDA and other comparable foreign regulatory agencies pursuant to inspections that would be conducted after we submit our marketing application or relevant foreign regulatory submission to the applicable regulatory agency. There can be no assurance that our preclinical and clinical development product supplies will be sufficient, uninterrupted or of satisfactory quality or continue to be available at acceptable prices. If our contract manufacturers cannot successfully manufacture material that conforms to our specifications and the strict regulatory requirements of the FDA or applicable foreign regulatory agencies, they will not be able to secure or maintain regulatory approval for their manufacturing facilities. Any replacement of our manufacturers could require significant effort and expertise because there may be a limited number of qualified replacements.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The manufacturing process for a product candidate is subject to FDA and foreign regulatory authority review. Suppliers and manufacturers must meet applicable manufacturing requirements and undergo rigorous facility and process validation tests required by regulatory authorities in order to comply with regulatory standards, such as current good manufacturing practices. We have no direct control over our contract manufacturers&#8217; ability to maintain adequate quality control, quality assurance and qualified personnel. In the event that any of our manufacturers fails to comply with regulatory requirements or to perform its obligations to us in relation to quality, timing or otherwise, or if our supply of components or other materials becomes limited or interrupted for other reasons, we may be forced to manufacture the materials ourselves, for which we currently do not have the capabilities or resources, or enter into </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">51</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">an agreement with another third party, which we may not be able to do on reasonable terms, if at all. In some cases, the technical skills or technology required to manufacture our product candidates may be unique or proprietary to the original manufacturer, and we may have difficulty transferring such skills or technology to another third party and a feasible alternative may not exist. These factors would increase our reliance on such manufacturer or require us to obtain a license from such manufacturer in order to have another third-party manufacture our product candidates. If we are required to change manufacturers for any reason, we will be required to verify that the new manufacturer maintains facilities and procedures that comply with quality standards and with all applicable regulations and guidelines. The delays associated with the verification of a new manufacturer could negatively affect our ability to develop product candidates in a timely manner or within budget. Our reliance on contract manufacturers also exposes us to the possibility that they, or third parties with access to their facilities, will have access to and may appropriate our trade secrets or other proprietary information.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We expect to continue to rely on third-party manufacturers if we receive regulatory approval for any product candidate. To the extent that we have existing, or enter into future, manufacturing arrangements with third parties, we will depend on these third parties to perform their obligations in a timely manner consistent with contractual and regulatory requirements, including those related to quality control and assurance. If we are unable to obtain or maintain third-party manufacturing for product candidates, or to do so on commercially reasonable terms, we may not be able to develop and commercialize our product candidates successfully. Our or a third party&#8217;s failure to execute on our manufacturing requirements and comply with cGMP could adversely affect our business in a number of ways, including:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">a delay or inability to initiate or continue clinical trials of product candidates under development;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">delay in submitting regulatory applications, or delay or failure to receive regulatory approvals, for product candidates;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">loss of the cooperation of an existing or future strategic partner;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">subjecting third-party manufacturing facilities or our manufacturing facilities to additional inspections by regulatory authorities;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">a requirement to cease distribution or to recall batches of our product candidates;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">in the event of approval to market and commercialize a product candidate, an inability to meet commercial demands for our products; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">fines, adverse publicity, and civil and criminal enforcement and sanctions.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We, or our third-party manufacturers, may be unable to successfully scale-up manufacturing of our ADC product candidates in sufficient quality and quantity, which would delay or prevent us from developing our ADC product candidates and commercializing approved products, if any.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In order to conduct clinical trials of our product candidates and commercialize any approved product candidates, we, or our manufacturing partners, will need to manufacture them in large quantities. We, or our manufacturing partners, may be unable to successfully increase the manufacturing capacity for any of our product candidates in a timely or cost-effective manner, or at all. In addition, quality issues may arise during scale-up activities. If we, or any manufacturing partners, are unable to successfully scale up the manufacture of our product candidates in sufficient quality and quantity, the development, testing and clinical trials of that product candidate may be delayed or infeasible, and regulatory approval or commercial launch of any resulting product may be delayed or not obtained, which could significantly harm our business. We have evaluated which third-party manufacturers to engage for scale-up to commercial supply of our product candidates, including UpRi, and we have begun to transfer and scale-up certain manufacturing activities. If we are unable to obtain or maintain third-party manufacturing for commercial supply of our product candidates, or to do so on commercially reasonable terms, we may not be able to develop and commercialize our product candidates successfully.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">52</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We rely on third parties to conduct preclinical studies and clinical trials for UpRi, XMT-1660, XMT-2056 and our other product candidates, and if such third parties do not properly, timely and successfully perform their obligations to us, we may not be able to obtain regulatory approvals for UpRi, XMT-1660, XMT-2056 or any other current or future ADC product candidates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We designed the ongoing and planned clinical trials for UpRi, XMT-1660 and XMT-2056, as well as the trial for XMT-1592 that closed in September 2022, and we intend to design any future clinical trials for any future unpartnered product candidates that we may develop if preclinical studies are successful. However, we rely on CROs, clinical sites, investigators and other third parties to assist in managing, monitoring and otherwise carrying out many of these trials. As a result, we have less direct control over the conduct, timing and completion of these clinical trials and the management of data developed through clinical trials than would be the case if we were relying entirely upon our own staff. These CROs, investigators and other third parties are not our employees, and we have limited control over the amount of time and resources that they dedicate to our programs. We compete with many other companies for the resources of these third parties. These third parties may have contractual relationships with other entities, some of which may be our competitors, which may draw time and resources from our programs. The third parties with whom we contract might not be diligent, careful or timely in conducting our preclinical studies or clinical trials, or complying with current good laboratory practices or current good clinical practices, as applicable, resulting in the preclinical studies or clinical trials being delayed or unsuccessful.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The third parties on whom we rely generally may terminate their engagements at any time, and having to enter into alternative arrangements would delay development and commercialization of our product candidates. Communicating with outside parties can also be challenging, potentially leading to mistakes as well as difficulties in coordinating activities. Outside parties may:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">have staffing difficulties;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">fail to comply with contractual obligations;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">experience regulatory compliance issues;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">undergo changes in priorities or become financially distressed; or</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">form relationships with other entities, some of which may be our competitors.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The FDA and comparable foreign regulatory authorities require compliance with regulations and standards, including GCP, for designing, conducting, monitoring, recording, analyzing and reporting the results of clinical trials to assure that the data and results are credible and accurate and that the rights, integrity and confidentiality of trial participants are protected. Although we rely, and intend to continue to rely, on third parties to conduct our clinical trials, they are not our employees, and we are responsible for ensuring that each of these clinical trials is conducted in accordance with its general investigational plan, protocol and other requirements. Our reliance on these third parties for research and development activities will reduce our control over these activities but will not relieve us of our responsibilities. For any violations of laws or regulations during the conduct of our clinical trials, we could be subject to untitled and warning letters or enforcement action that may include civil penalties up to and including criminal prosecution.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">If these third parties do not successfully carry out their duties under their agreements, if the quality or accuracy of the data they obtain is compromised due to their failure to adhere to clinical trial protocols or to regulatory requirements, or if they otherwise fail to comply with clinical trial protocols or meet expected deadlines, the clinical trials of our product candidates may not meet regulatory requirements. The FDA enforces GCP regulations through periodic inspections of clinical trial sponsors, principal investigators and trial sites. If we or our CROs fail to comply with applicable GCPs or other regulatory requirements, the clinical data generated in our clinical trials may be deemed unreliable, third parties may need to be replaced, we may be subject to negative publicity, fines and civil or criminal sanctions, and preclinical development activities or clinical trials may be extended, delayed, suspended or </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">53</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">terminated. If any of these events occur, we may not be able to obtain regulatory approval of our product candidates on a timely basis or at all.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We depend on strategic partnerships with other companies to assist in the research, development and commercialization of our ADC platforms and ADC product candidates. If our existing partners do not perform as expected, this may negatively affect our ability to commercialize our ADC product candidates or generate revenues through technology licensing or may otherwise negatively affect our business.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We have established strategic partnerships and intend to continue to establish strategic partnerships with third parties to research, develop and commercialize our platforms and existing and future product candidates. In August 2022, we entered into an option, collaboration and license agreement, or the GSK Agreement, with GlaxoSmithKline Intellectual Property (No. 4) Limited, or GSK, pursuant to which we granted GSK an exclusive option to obtain an exclusive license to co-develop and to commercialize products containing XMT-2056, and in February 2022, we entered into a collaboration agreement with Janssen Biotech, Inc. for the research, development and commercialization of ADC product candidates leveraging our Dolasynthen platform. We had also entered into a collaboration agreement with Merck KGaA for the development and commercialization of ADC product candidates leveraging our Dolaflexin platform. Under these collaborations, we will depend on our partners to design and conduct their clinical trials. As a result, we will not be able to control or oversee the conduct of these programs by our partners and those programs may not be successful, which may negatively impact our business operations. In addition, if any of these partners withdraw support for these programs or proposed products or otherwise impair their development or experience negative results, our business and our product candidates could be negatively affected.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our partners may terminate their agreements with us for cause under certain circumstances or at will in certain cases and discontinue use of our technologies. In addition, we cannot control the amount and timing of resources our partners may devote to products utilizing or incorporating our technology. Moreover, our relationships with our partners may divert significant time and effort of our scientific staff and management team and require effective allocation of our resources to multiple internal and collaborative projects. Our partners may fail to perform their obligations under the collaboration agreements or may not perform their obligations in a timely manner. If conflicts arise between our partners and us, the other party may act in a manner adverse to us and could limit our ability to implement our strategies. If any of our partners terminate or breach our agreements with them, or otherwise fail to complete their obligations in a timely manner, or if GSK ultimately decides not to exercise its option for a license to co-develop and commercialize XMT-2056, it may have a detrimental effect on our financial position by reducing or eliminating the potential for us to receive technology access and license fees, milestones and royalties, reimbursement of development costs, as well as possibly requiring us to devote additional efforts and incur costs associated with pursuing internal development of product candidates. Furthermore, if our partners do not prioritize and commit sufficient resources to programs associated with our product candidates or collaboration product candidates, we or our partners may be unable to commercialize these product candidates, which would limit our ability to generate revenue and become profitable.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our partners may separately pursue competing products, therapeutic approaches or technologies to develop treatments for the diseases targeted by us or our partners. Competing products, either developed by our partners or to which our partners have rights, may result in the withdrawal of partner support for our product candidates. Even if our partners continue their contributions to the strategic partnerships, they may nevertheless determine not to actively pursue the development or commercialization of any resulting products. Additionally, if our partners pursue different clinical or regulatory strategies with their product candidates based on our platforms or technologies, adverse events with their product candidates could negatively affect our product candidates utilizing similar technologies. Any of these developments could harm our product development efforts.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">To date, we have depended on a small number of partners for a substantial portion of our revenue. The loss of any one of these partners could result in non-achievement of our expected revenue payments.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We have entered into strategic partnerships with a limited number of companies. To date, a substantial portion of our revenue has resulted from payments made under agreements with our strategic partners, and we expect that a portion of our revenue will continue to come from strategic partnerships. The loss of any of our partners, or the failure of </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">54</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">our partners to perform their obligations under their agreements with us, including paying license or technology fees, milestone payments, royalties or reimbursements, could have a material adverse effect on our financial performance. Payments under our existing and future strategic partnerships are also subject to significant fluctuations in both timing and amount, which could cause our revenue to fall below the expectations of securities analysts and investors and cause a decrease in our stock price.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We may seek to establish additional strategic partnerships, and if we are not able to establish them on commercially reasonable terms, or maintain them, we may have to alter our development and commercialization plans.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We continue to strategically evaluate our partnerships and, as appropriate, we expect to enter into additional strategic partnerships in the future, including potentially with major biotechnology or biopharmaceutical companies. We face significant competition in seeking appropriate partners for our product candidates, and the negotiation process is time-consuming and complex. In order for us to successfully partner our product candidates, potential partners must view these product candidates as economically valuable in markets they determine to be attractive in light of the terms that we are seeking and other available products for licensing by other companies. Even if we are successful in our efforts to establish strategic partnerships, the terms that we agree upon may not be favorable to us, and we may not be able to maintain such strategic partnerships if, for example, development or approval of a product candidate is delayed or sales of an approved product are disappointing. Any delay in entering into strategic partnership agreements related to our product candidates could delay the development and commercialization of such candidates and reduce their competitiveness even if they reach the market. If we are not able to generate revenue under our strategic partnerships when and in accordance with our expectations or the expectations of industry analysts, this failure could harm our business and have an immediate adverse effect on the trading price of our common stock.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">If we fail to establish and maintain additional strategic partnerships related to our unpartnered product candidates, we will bear all of the risk and costs related to the development of any such product candidate, and we may need to seek additional financing, hire additional employees and otherwise develop expertise, such as regulatory expertise, for which we have not budgeted. If we are not successful in seeking additional financing, hiring additional employees or developing additional expertise, if necessary, our cash burn rate would increase or we would need to take steps to reduce our rate of product candidate development. This could negatively affect the development of any unpartnered product candidate.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Risks Related to Commercialization of Our ADC Product Candidates</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Our future commercial success depends upon attaining significant market acceptance of our ADC product candidates, if approved, among physicians, patients and health care payors.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Even if we obtain regulatory approval for UpRi or any other current or future product candidates that we may develop or acquire in the future, the product candidate may not gain market acceptance among physicians, health care payors, patients and the broader healthcare community. Market acceptance of any approved products depends on a number of factors, including:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the efficacy and safety of the product, as demonstrated in clinical trials;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the indications for which the product is approved and the label approved by regulatory authorities for use with the product, including any warnings that may be required on the label;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">acceptance by physicians and patients of the product as a safe and effective treatment;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the cost, safety and efficacy of treatment in relation to alternative treatments;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the availability of adequate reimbursement and pricing by third-party payors and government authorities;</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">55</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">relative convenience and ease of administration;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the prevalence and severity of adverse side effects; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the effectiveness of our sales and marketing efforts.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Perceptions of any product are influenced by perceptions of competitors&#8217; products that are in the same class of drugs or have a similar mechanism of action. As a result, adverse public perception of our competitors&#8217; products may negatively impact the market acceptance of our product candidates. Market acceptance is critical to our ability to generate significant revenue and become profitable. Any therapeutic candidate, if approved and commercialized, may be accepted in only limited capacities or not at all. If any approved products are not accepted by the market to the extent that we expect, we may not be able to generate significant revenue and our business would suffer.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">The incidence and prevalence for target patient populations of our drug candidates have not been established with precision. If the market opportunities for our drug candidates, including particularly UpRi, are smaller than we estimate or if any approval that we obtain is based on a narrower definition of the patient population, our revenue and ability to achieve profitability will be adversely affected, possibly materially.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The precise incidence and prevalence of ovarian cancer with NaPi2b expression are unknown. Our projections of both the number of people who have this disease, as well as the subset of people with ovarian cancer who have the potential to benefit from treatment with UpRi, are based on estimates. The total addressable market opportunity for UpRi for the treatment of ovarian cancer with NaPi2b expression will ultimately depend upon, among other things, the diagnosis criteria included in the final label for UpRi, if UpRi is approved for sale for this indication, acceptance by the medical community, the approval and availability of a commercial diagnostic assay to identify patients with NaPi2b positive ovarian cancer, and patient access, drug pricing and reimbursement. The number of patients who can be treated with UpRi or any of our other current or future product candidates may turn out to be lower than expected, patients may not be otherwise amenable to treatment with our drugs,  we may face increasing difficulties in identifying or gaining access to new patients, or diagnostic assays to help identify patients may not be available , all of which would adversely affect our results of operations and our business.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">If we are unable to establish sales, marketing and distribution capabilities, we may not be successful in commercializing our product candidates if and when they are approved.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We do not have a sales or marketing infrastructure and have no experience in the sale, marketing or distribution of products. To achieve commercial success for any product for which we have obtained marketing approval, we will need to establish a sales and marketing organization or pursue a collaborative arrangement for such sales and marketing.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In the future, we expect to build a focused sales and marketing infrastructure to market UpRi and XMT-1660 and any other current or future product candidates in the United States and certain foreign jurisdictions, if and when they are approved, and we may potentially do so for XMT-2056. There are risks involved with establishing our own sales, marketing and distribution capabilities.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">For example, recruiting and training a sales force is expensive and time consuming and could delay any product launch. If the commercial launch of a product candidate for which we recruit a sales force and establish marketing capabilities is delayed or does not occur for any reason, we would have prematurely or unnecessarily incurred these commercialization expenses. This may be costly, and our investment would be lost if we cannot retain or reposition our sales and marketing personnel.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Factors that may inhibit our efforts to commercialize our products on our own include:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">our inability to recruit, train and retain adequate numbers of effective sales and marketing personnel;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the inability of sales personnel to obtain access to physicians;</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">56</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the lack of adequate numbers of physicians to prescribe any future products;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the lack of complementary products to be offered by sales personnel, which may put us at a competitive disadvantage relative to companies with more extensive product lines; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">unforeseen costs and expenses associated with creating an independent sales and marketing organization.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">If we are unable to establish our own sales, marketing and distribution capabilities and enter into arrangements with third parties to perform these services, our product revenues and our profitability, if any, are likely to be lower than if we were to market, sell and distribute any products that we develop ourselves.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In addition, we may not be successful in entering into arrangements with third parties to sell, market and distribute certain of our product candidates outside of the United States or may be unable to do so on terms that are favorable to us. We likely will have limited control over such third parties, and any of them may fail to devote the necessary resources and attention to sell and market our products effectively. If we do not establish sales, marketing and distribution capabilities successfully, either on our own or in collaboration with third parties, we will not be successful in commercializing our product candidates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Reimbursement may be limited or unavailable in certain market segments for our ADC product candidates, which could make it difficult for us to sell our products profitably.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In both domestic and foreign markets, sales of any of our product candidates, if approved, will depend, in part, on the extent to which the costs of our products will be covered by third-party payors, such as government health programs, commercial insurance and managed health care organizations. These third-party payors decide which drugs will be covered and establish reimbursement levels for those drugs. The containment of health care costs has become a priority of foreign and domestic governments as well as private third-party payors. The prices of drugs have been a focus in this effort. Governments and private third-party payors have attempted to control costs by limiting coverage and the amount of reimbursement for particular medications, which could affect our ability to sell our product candidates profitably. Cost-control initiatives could cause us to decrease the price we might establish for products, which could result in lower than anticipated product revenues.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Reimbursement by a third-party payor may depend upon a number of factors, including the third-party payor&#8217;s determination that use of a product is:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">a covered benefit under its health plan;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">safe, effective and medically necessary;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">appropriate for the specific patient;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">cost-effective; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">neither experimental nor investigational.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Adverse pricing limitations may hinder our ability to recoup our investment in UpRi, XMT-1660, XMT-2056 or any other current or future product candidates, even if such product candidates obtain marketing approval.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Obtaining coverage and reimbursement approval for a product from a government or other third-party payor is a time consuming and costly process that could require us to provide supporting scientific, clinical and cost-effectiveness data for the use of our products to the payor. Further, there is significant uncertainty related to third-party payor coverage and reimbursement of newly approved drugs. We may not be able to provide data sufficient to gain acceptance with respect to coverage and reimbursement. We cannot be sure that coverage or adequate reimbursement will be available for any of our product candidates. Also, we cannot be sure that reimbursement amounts will not reduce the demand for, or the price of, our products. If reimbursement is not available or is </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">57</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">available only to limited levels, we may not be able to commercialize certain of our products. In addition, in the United States, third-party payors are increasingly attempting to contain health care costs by limiting both coverage and the level of reimbursement of new drugs. As a result, significant uncertainty exists as to whether and how much third-party payors will reimburse patients for their use of newly approved drugs, which in turn will put pressure on the pricing of drugs. Manufacturers further may be required to offer price concessions to achieve sales or favorable coverage.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Price controls may be imposed in foreign markets, which may adversely affect our future profitability.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In some countries, including member states of the European Union, the pricing of prescription drugs is subject to governmental control. Additional countries may adopt similar approaches to the pricing of prescription drugs. In such countries, pricing negotiations with governmental authorities can take considerable time after receipt of marketing approval for a product. In addition, there can be considerable pressure by governments and other stakeholders on prices and reimbursement levels, including as part of cost containment measures. Political, economic and regulatory developments may further complicate pricing negotiations, and pricing negotiations may continue after reimbursement has been obtained. Reference pricing used by various European Union member states and parallel distribution, or arbitrage between low-priced and high-priced member states, can further reduce prices. In some countries, we may be required to conduct a clinical trial or other trials that compare the cost-effectiveness of our product candidates to other available therapies in order to obtain or maintain reimbursement or pricing approval. We cannot be sure that such prices and reimbursement will be acceptable to us or our strategic partners. Publication of discounts by third-party payors or authorities may lead to further pressure on the prices or reimbursement levels within the country of publication and other countries. If pricing is set at unsatisfactory levels or if reimbursement of our products is unavailable or limited in scope or amount, our revenues from sales by us or our strategic partners and the potential profitability of our product candidates in those countries would be negatively affected.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We face substantial competition, and if our competitors develop and market products that are more effective, safer or less expensive than any of our current or future product candidates, our commercial opportunities will be negatively impacted.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The biotechnology and biopharmaceutical industries are characterized by rapidly advancing technologies, intense competition and a strong emphasis on proprietary products. Many third parties compete with us in developing various approaches to cancer therapy. They include pharmaceutical companies, biotechnology companies, academic institutions and other research organizations. Any treatments developed by our competitors could be superior to our product candidates. It is possible that these competitors will succeed in developing technologies that are more effective than our platforms or product candidates or that would render our platforms obsolete, noncompetitive or not economical. We anticipate that we will face increased competition in the future as additional companies enter our market and scientific developments surrounding other cancer therapies continue to accelerate.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We are also aware of multiple companies with ADC technologies that may be competitive to our platforms, including but not limited to Daiichi Sankyo Company, Limited, ImmunoGen, Inc., Gilead Sciences, Inc. (Immunomedics), Pfizer AG and SeaGen Inc. These companies or their partners, including Astellas Pharma Inc., AstraZeneca plc, AbbVie Inc., Genentech (a member of the Roche Group) and Takeda Pharmaceuticals, Inc., or Takeda, may develop product candidates which compete in the same indications as our current and future product candidates. Multiple companies are also developing immune stimulating ADCs that could compete with our Immunosynthen products, including Bolt Biotherapeutics, Inc. and Takeda. We expect to compete on improved efficacy, safety and tolerability compared to other product candidates, and if our products are not demonstrably superior in these respects compared to other approved therapeutics, we may not be able to compete effectively. Products we may develop in the future are also likely to face competition from other products and therapies, some of which we may not currently be aware.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Many of our competitors have significantly greater financial resources and expertise in research and development, manufacturing, preclinical studies, conducting clinical trials, obtaining regulatory approval and marketing than we do. In addition, many of these competitors are active in seeking patent protection and licensing arrangements in anticipation of collecting royalties for use of technology that they have developed. Large pharmaceutical companies, </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">58</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">in particular, have extensive experience in clinical testing, obtaining marketing approvals, establishing clinical trial sites, recruiting patients and in manufacturing pharmaceutical products and may succeed in discovering, developing and commercializing products in our field before we do. Smaller or early-stage companies may also prove to be significant competitors, particularly through strategic partnerships with large and established companies. These third parties compete with us in recruiting and retaining qualified scientific and management personnel, as well as in acquiring technologies complementary to our programs.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In addition, if our product candidates are approved and commercialized, we may face competition from biosimilars. The route to market for biosimilars was established with the passage of the Health Care Reform Act in March 2010. The Biologics Price Competition and Innovation Act of 2009, or BPCIA, establishes a pathway for FDA approval of follow-on biologics and provides 12 years of data exclusivity for reference products. The BPCIA is complex and continues to be interpreted and implemented by the FDA. In addition, government proposals have sought to reduce the 12-year reference product exclusivity period. Further, since the BPCIA was enacted as part of the overall Health Care Reform Act, current litigation challenges to that Act, discussed more in full below, could impact the validity of the BPCIA. As a result, there still remains significant uncertainty as to the ultimate impact, implementation and regulatory interpretation of the BPCIA.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In Europe, the European Medicines Agency, or EMA, has issued guidelines for approving products through an abbreviated pathway, and biosimilars have been approved in Europe. If a biosimilar version of one of our potential products were approved in the United States or Europe, it could have a negative effect on sales and gross profits of the potential product and our financial condition.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">With respect to our current and potential future product candidates, we believe that our ability to compete effectively and develop products that can be manufactured cost-effectively and marketed successfully will depend on our ability to:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">advance our technology platforms;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">obtain and maintain intellectual property protection for our technologies and products;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">obtain required government and other public and private approvals on a timely basis;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">attract and retain key personnel;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">commercialize effectively;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">obtain reimbursement for our products in approved indications;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">comply with applicable laws, regulations and regulatory requirements and restrictions with respect to the commercialization of our products, including with respect to any changed or increased regulatory restrictions; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">enter into additional strategic partnerships to advance the development and commercialization of our product candidates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Risks Related to Our Intellectual Property</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">If we are unable to obtain or protect intellectual property rights related to our technology and ADC product candidates, or if our intellectual property rights are inadequate, we may not be able to compete effectively.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">59</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our success depends in large part on our ability to obtain and maintain protection with respect to our intellectual property and proprietary technology. We rely upon a combination of patents, trade secret protection and confidentiality agreements to protect the intellectual property related to our platforms and our product candidates, including UpRi, XMT-1660 and XMT-2056. The patent position of biopharmaceutical companies is generally uncertain because it involves complex legal and factual considerations and has, in recent years, been the subject of much litigation. As a result, the issuance, scope, validity, enforceability and commercial value of our patent rights is highly uncertain. The standards applied by the United States Patent and Trademark Office, or USPTO, and foreign patent offices in granting patents are not always applied uniformly or predictably. For example, there is no uniform worldwide policy regarding patentable subject matter or the scope of claims allowable in patents. In addition, changes in either the patent laws or interpretation of the patent laws in the United States and other countries may diminish the value of our patents or narrow the scope of our patent protection. The patent prosecution process is expensive, complex and time-consuming, and we may not be able to file, prosecute, maintain, enforce or license all necessary or desirable patents and patent applications at a reasonable cost or in a timely manner. It is also possible that we fail to identify patentable aspects of our research and development output before it is too late to obtain patent protection. There is no assurance that all potentially relevant prior art relating to our patents and patent applications has been found. We may be unaware of prior art that could be used to invalidate an issued patent or prevent our pending patent applications from issuing as patents.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The patent applications that we own or in-license may fail to result in issued patents, and even if they do issue as patents, such patents may not cover our platforms and product candidates in the United States or in other countries. The issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability, and our patents may be challenged in the courts or patent offices in the United States and abroad. Such challenges may result in loss of exclusivity or in patent claims being narrowed, invalidated or held unenforceable, which could limit our ability to stop others from using or commercializing similar or identical technology and products, or limit the duration of the patent protection of our technology and product candidates. For example, even if patent applications we license or own do successfully issue as patents and even if such patents cover our platforms and product candidates, third parties may challenge their validity, enforceability or scope, which may result in such patents being narrowed or invalidated. Furthermore, even if they are unchallenged, our patents and patent applications may not provide adequate protection or exclusivity for our ADC platform or product candidates, prevent others from designing around our claims or otherwise provide us with a competitive advantage. Any of these outcomes could impair our ability to prevent competition from third parties, which may have an adverse impact on our business.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">If patent applications we own or have in-licensed with respect to our platforms or our product candidates fail to issue as patents, if their breadth or strength of protection is threatened, or if they fail to provide meaningful exclusivity, it could dissuade companies from collaborating with us. We cannot offer any assurances about which, if any, patents will issue, the breadth of any such patents or whether any issued patents will be found invalid and unenforceable or will be threatened by third parties. Any successful challenge to these patents or any other patents owned by or licensed to us could deprive us of rights necessary for the successful development and commercialization of any product candidate. Since patent applications in the United States and most other countries are confidential for a period of time after filing, and some remain so until issued, we cannot be certain that we were the first to file any patent application related to a product candidate. Furthermore, if third parties have filed such patent applications, an interference proceeding in the United States can be initiated by the USPTO or a third-party to determine who was the first to invent any of the subject matter covered by the patent claims of our applications. In addition, patents have a limited lifespan. In the United States, the natural expiration of a patent is generally 20 years after it is filed. Various extensions may be available; however, the life of a patent and the protection it affords is limited. Given the amount of time required for the development, testing and regulatory review of new product candidates, our owned or in-licensed patents protecting such candidates might expire before or shortly after such candidates are commercialized. If we encounter delays in obtaining regulatory approvals, the period of time during which we could market a drug under patent protection could be further reduced. Even if patents covering our product candidates are obtained, once the patent life has expired for a product, we may be open to competition from similar or generic products. The launch of a generic version of one of our products in particular would be likely to result in an immediate and substantial reduction in the demand for our product, which could have a material adverse effect on our business, financial condition, results of operations and prospects.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">60</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">On September 16, 2011, the Leahy-Smith America Invents Act, or the Leahy-Smith Act, was signed into law. The Leahy-Smith Act includes a number of significant changes to U.S. patent law. These include provisions that affect the way patent applications are prosecuted, redefine prior art, may affect patent litigation and switch the U.S. patent system from a &#8220;first-to-invent&#8221; system to a &#8220;first-to-file&#8221; system. Under a first-to-file system, assuming the other requirements for patentability are met, the first inventor to file a patent application generally will be entitled to the patent on an invention regardless of whether another inventor had made the invention earlier. These provisions also allow third-party submission of prior art to the USPTO during patent prosecution and set forth additional procedures to attack the validity of a patent by the USPTO administered post grant proceedings. The USPTO developed additional regulations and procedures to govern administration of the Leahy-Smith Act, and many of the substantive changes to patent law associated with the Leahy-Smith Act, and, in particular, the first-to-file provisions, became effective on March 16, 2013. Accordingly, it is not clear what, if any, impact the Leahy-Smith Act will have on the operation of our business. The Leahy-Smith Act and its implementation could increase the uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued patents, all of which could have a material adverse effect on our business, financial condition, results of operations and prospects.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Any loss of patent protection could have a material adverse impact on our business. We may be unable to prevent competitors from entering the market with a product that is similar to or the same as our product candidates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Issued patents covering UpRi, XMT-1660, XMT-2056 and any other current or future ADC product candidates could be found invalid or unenforceable if challenged in court or before the USPTO or comparable foreign authority.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">If we or one of our licensing partners initiate legal proceedings against a third party to enforce a patent covering UpRi, XMT-1660, XMT-2056 or any other current or future product candidates, the defendant could counterclaim that the patent covering our product candidate is invalid or unenforceable. In patent litigation in the United States, defendant counterclaims alleging invalidity or unenforceability are commonplace, and there are numerous grounds upon which a third party can assert invalidity or unenforceability of a patent. Grounds for a validity challenge could be, among other things, an alleged failure to meet any of several statutory requirements, including lack of novelty, obviousness, lack of written description or non-enablement. Grounds for an unenforceability assertion could be, among other things, an allegation that someone connected with prosecution of the patent withheld relevant information from the USPTO, or made a misleading statement, during prosecution. Third parties may also raise similar claims before administrative bodies in the United States or abroad, even outside the context of litigation. Such mechanisms include re-examination, inter partes review, post-grant review, interference proceedings, derivation proceedings and equivalent proceedings in foreign jurisdictions (e.g., opposition proceedings). Such proceedings could result in revocation, cancellation or amendment to our patents in such a way that they no longer cover and protect our product candidates. The outcome following legal assertions of invalidity and unenforceability is unpredictable. With respect to the validity of our patents, for example, we cannot be certain that there is no invalidating prior art of which we, our licensors, our patent counsel and the patent examiner were unaware during prosecution. If a third party were to prevail on a legal assertion of invalidity or unenforceability, we would lose at least part, and perhaps all, of the patent protection on one or more of our product candidates. Any such loss of patent protection could have a material adverse impact on our business, financial condition, results of operations and prospects.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">If we fail to comply with our obligations under any license, strategic partnership or other agreements, we may be required to pay damages and could lose intellectual property rights that are necessary for developing and protecting our ADC product candidates.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">61</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We rely, in part, on license, collaboration and other agreements. We may need to obtain additional licenses from others to advance our research or allow commercialization of our product candidates and it is possible that we may be unable to obtain additional licenses at a reasonable cost or on reasonable terms, if at all. The licensing or acquisition of third party intellectual property rights is a competitive area, and several more established companies may pursue strategies to license or acquire third party intellectual property rights that we may consider attractive. These established companies may have a competitive advantage over us due to their size, capital resources and greater clinical development and commercialization capabilities. In addition, companies that perceive us to be a competitor may be unwilling to assign or license rights to use. We also may be unable to license or acquire third-party intellectual property rights on terms that would allow us to make an appropriate return on our investment.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In addition, our existing licenses and collaboration agreements, including our license with Recepta Biopharma S.A., or Recepta, for intellectual property covering the NaPi2b antibody in UpRi, and our license with Synaffix B.V., or Synaffix, for intellectual property covering components included in the Dolasynthen platform, impose, and any future licenses, collaborations or other agreements we enter into are likely to impose, various development, commercialization, funding, milestone, royalty, diligence, sublicensing, insurance, patent prosecution and enforcement or other obligations on us. If we breach any of these obligations, or use the intellectual property licensed to us in an unauthorized manner, we may be required to pay damages and the licensor may have the right to terminate the license, including, in the case of our agreement with Recepta, the license for the rights covering the NaPi2b antibody in UpRi and, in the case of our agreement with Synaffix, the license for the rights covering components in the Dolasynthen platform. Any of the foregoing could result in us being unable to develop, manufacture and sell products that are covered by the licensed technology or enable a competitor to gain access to the licensed technology. Disputes may arise regarding intellectual property subject to a licensing, collaboration or other agreements, including:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the scope of rights granted under the license agreement and other interpretation related issues;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the extent to which our technology and processes infringe on intellectual property of the licensor that is not subject to the licensing agreement;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the sublicensing of patent and other rights under our collaborative development relationships;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">our diligence obligations under the license agreement and what activities satisfy those diligence obligations;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the inventorship and ownership of inventions and know how resulting from the joint creation or use of intellectual property by our licensors and us and our partners; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the priority of invention of patented technology.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In addition, the agreements under which we currently license intellectual property or technology to or from third parties are complex, and certain provisions in such agreements may be susceptible to multiple interpretations. The resolution of any contract interpretation disagreement that may arise could narrow what we believe to be the scope of our rights to the relevant intellectual property or technology, or increase what we believe to be our financial or other obligations under the relevant agreement, either of which could have a material adverse effect on our business, financial condition, results of operations and prospects. Moreover, if disputes over intellectual property that we have licensed prevent or impair our ability to maintain our current licensing arrangements on commercially acceptable terms, we may be unable to successfully develop and commercialize the affected product candidates.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">62</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In some circumstances, we may not have the right to control the preparation, filing and prosecution of patent applications, or to maintain the patents, covering the technology that we license from third parties. For example, pursuant to our license agreement with Recepta, Ludwig Institute for Cancer Research Ltd., a co-owner of the intellectual property, retains control of such activities. Therefore, we cannot be certain that these patents and applications will be prosecuted, maintained and enforced in a manner consistent with the best interests of our business. If our licensors fail to obtain or maintain such intellectual property, or lose rights to such intellectual property, the rights we have licensed and our exclusivity may be reduced or eliminated and our right to develop and commercialize any of our products that are subject to such licensed rights could be adversely affected.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Moreover, our rights to our in-licensed patents and patent applications are dependent, in part, on inter-institutional or other operating agreements between the joint owners of such in-licensed patents and patent applications. If one or more of such joint owners breaches such inter-institutional or operating agreements, our rights to such in-licensed patents and patent applications may be adversely affected. In addition, while we cannot currently determine the amount of the royalty obligations we would be required to pay on sales of future products, if any, the amounts may be significant. The amount of our future royalty obligations will depend on the technology and intellectual property we use in products that we successfully develop and commercialize, if any. Therefore, even if we successfully develop and commercialize products, we may be unable to achieve or maintain profitability. Any of the foregoing could have a material adverse effect on our competitive position, business, financial conditions, results of operations and prospects.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">If we are unable to successfully obtain rights to required third-party intellectual property rights or maintain the existing intellectual property rights we have, we may have to abandon development of the relevant program or product candidate and our business, financial condition, results of operations and prospects could suffer.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We may become involved in lawsuits to protect or enforce our intellectual property or to defend against intellectual property claims, which could be expensive, time consuming and unsuccessful.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Competitors and other third parties may infringe our patents or misappropriate or otherwise violate our owned and in-licensed intellectual property rights. To counter infringement or unauthorized use, litigation or other intellectual property proceedings may be necessary to enforce or defend our owned and in-licensed intellectual property rights, to protect our trade secrets or to determine the validity and scope of our own intellectual property rights or the proprietary rights of others. Such litigation or proceedings can be expensive and time consuming, and any such claims could provoke defendants to assert counterclaims against us, including claims alleging that we infringe their patents or other intellectual property rights. We may not have sufficient financial or other resources to adequately conduct such litigation or proceedings. Many of our current and potential competitors have the ability to dedicate substantially greater resources to litigate intellectual property rights than we can and have more mature and developed intellectual property portfolios. Accordingly, despite our efforts, we may not be able to prevent third parties from infringing upon or misappropriating our intellectual property. Even if resolved in our favor, litigation or other intellectual property proceedings could result in substantial costs and diversion of management attention and resources, which could harm our business and financial results.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In addition, in a litigation or other proceeding, a court or administrative judge may decide that a patent owned by or licensed to us is invalid or unenforceable, or a court may refuse to stop the other party from using the technology at issue on the grounds that our patents do not cover the technology in question. An adverse result in any litigation or other proceeding could put one or more of our patents at risk of being invalidated, held unenforceable or interpreted narrowly. Furthermore, because of the substantial amount of discovery required in connection with intellectual property litigation and other proceedings, there is a risk that some of our confidential information could be compromised by disclosure during this type of litigation. During the course of any patent or other intellectual property litigation or other proceeding, there could be public announcements of the results of hearings, rulings on motions and other interim proceedings or developments and if securities analysts or investors regard these announcements as negative, the perceived value of our product candidates, programs or intellectual property could be diminished. Accordingly, the market price of our common stock may decline. Any of the foregoing could have a material adverse effect on our business, financial conditions, results of operations and prospects.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">63</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Third-party claims of intellectual property infringement or misappropriation may prevent or delay our development and commercialization efforts.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our commercial success depends in part on our ability and the ability of our strategic partners to develop, manufacture, market and sell product candidates and use our proprietary technologies without infringing, misappropriating or otherwise violating the patents and proprietary rights of third parties. There is a substantial amount of litigation, both within and outside the United States, involving patent and other intellectual property rights in the biopharmaceutical industries, including patent infringement lawsuits, interferences, oppositions, reexamination, inter partes review, derivation and post grant review proceedings before the USPTO and corresponding foreign patent offices. Numerous U.S. and foreign issued patents and pending patent applications owned by third parties exist in the fields in which we are developing and may develop our product candidates. As the biopharmaceutical industries expand and more patents are issued, the risk increases that our product candidates may be subject to claims of infringement of the patent rights of third parties.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Third parties may assert that we, our customers, licensees or parties indemnified by us are employing their proprietary technology without authorization or have infringed upon, misappropriated or otherwise violated their intellectual property or other rights, regardless of their merit. For example, we may be subject to claims that we are infringing the patent, trademark or copyright rights of third parties, or that our employees have misappropriated or divulged their former employers&#8217; trade secrets or confidential information. There may be third-party patents or patent applications with claims to materials, formulations, methods of manufacture or methods for treatment related to the use or manufacture of our product candidates, that we failed to identify. For example, applications filed before November 29, 2000 and certain applications filed after that date that will not be filed outside the United States remain confidential until issued as patents. Except for certain exceptions, including the preceding exceptions, patent applications in the United States and elsewhere are generally published only after a waiting period of approximately 18 months after the earliest filing, and sometimes not at all. Therefore, patent applications covering our platforms or our product candidates could have been filed by others without our knowledge. Additionally, pending patent applications which have been published can, subject to certain limitations, be later amended in a manner that could cover our platforms, our product candidates or the use or manufacture of our product candidates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Even if we believe a third party&#8217;s claims against us are without merit, a court of competent jurisdiction could hold that such third party&#8217;s patent is valid, enforceable and covers aspects of our product candidates, including the materials, formulations, methods of manufacture, methods of analysis, or methods for treatment, in which case, such third party would be able to block our ability to develop and commercialize the applicable technology or product candidate until such patent expired or unless we obtain a license and we may be required to pay such third-party monetary damages, which could be substantial. Such licenses may not be available on acceptable terms, if at all. Even if we were able to obtain a license, the rights may be nonexclusive, which could result in our competitors gaining access to the same intellectual property and it could require us to make substantial licensing and royalty payments. Ultimately, we could be prevented from commercializing a product, or be forced to cease some aspect of our business operations, if, as a result of actual or threatened patent infringement claims, we are unable to enter into licenses on acceptable terms.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Parties making claims against us may also obtain injunctive or other equitable relief, which could effectively block our ability to further develop and commercialize our technologies or one or more of our product candidates. Defending against claims of patent infringement, misappropriation of trade secrets or other violations of intellectual property could be costly and time consuming, regardless of the outcome. Thus, even if we were to ultimately prevail, or to settle at an early stage, such litigation could burden us with substantial unanticipated costs. In addition, litigation or threatened litigation could result in significant demands on the time and attention of our management team, distracting them from the pursuit of other company business. In the event of a successful claim of infringement against us, in addition to potential injunctive relief, we may have to pay substantial damages, including treble damages and attorneys&#8217; fees for willful infringement, pay royalties, redesign our infringing products or obtain one or more licenses from third parties, which may be impossible or require substantial time and monetary expenditure.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">64</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We may face a claim of misappropriation if a third party believes that we inappropriately obtained and used trade secrets of such third party. If we are found to have misappropriated a third party&#8217;s trade secrets, we may be prevented from further using such trade secrets, limiting our ability to develop our product candidates, we may be required to obtain a license to such trade secrets which may not be available on commercially reasonable terms or at all and may be non-exclusive, and we may be required to pay damages, which could be substantial. Any of the foregoing could have a material adverse effect on our business, financial condition, results of operations and prospects.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We may not be able to protect our intellectual property and proprietary rights throughout the world.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Filing, prosecuting and defending patents on product candidates in all countries throughout the world where we expect there to be significant markets for our products could be prohibitively expensive, and the laws of foreign countries may not protect our rights to the same extent as the laws of the United States. In addition, our intellectual property license agreements may not always include worldwide rights. For example, certain U.S. and foreign issued patents and patent applications are licensed to us by Recepta on a worldwide basis, except that Recepta retains exclusive rights in such patents and patent applications in Brazil. Consequently, we may not be able to prevent third parties from practicing our inventions in all countries outside the United States. Competitors may use our technologies in jurisdictions where we have not obtained patent protection to develop their own products and, further, may export otherwise infringing products to territories where we have patent protection or licenses but enforcement is not as strong as that in the United States. These products may compete with our products, and our patents or other intellectual property rights may not be effective or sufficient to prevent them from competing.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Additionally, the laws of some foreign countries do not protect intellectual property rights to the same extent as the laws of the United States, and many companies have encountered significant problems in protecting and defending such rights in foreign jurisdictions. The legal systems of certain countries, particularly certain developing countries, do not favor the enforcement of patents and other intellectual property protection, particularly those relating to biotechnology, which could make it difficult for us to stop the infringement of our licensed and owned patents or marketing of competing products in violation of our intellectual property and proprietary rights generally. Proceedings to enforce our intellectual property and proprietary rights in foreign jurisdictions could result in substantial costs and divert our efforts and attention from other aspects of our business, could put our patents at risk of being invalidated or interpreted narrowly, could put our patent applications at risk of not issuing as patents, and could provoke third parties to assert claims against us. We may not prevail in any lawsuits that we initiate, and the damages or other remedies awarded, if any, may not be commercially meaningful. Accordingly, our efforts to enforce our intellectual property and proprietary rights around the world may be inadequate to obtain a significant commercial advantage from the intellectual property that we develop or license.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Many countries have compulsory licensing laws under which a patent owner may be compelled to grant licenses to third parties. In addition, many countries limit the enforceability of patents against government agencies or government contractors. In these countries, the patent owner may have limited remedies, which could materially diminish the value of such patent. If we or any of our licensors is forced to grant a license to third parties with respect to any patents relevant to our business, our competitive position may be impaired, and our business, financial condition, results of operations and prospects may be adversely affected.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Confidentiality agreements with employees and third parties may not prevent unauthorized disclosure of trade secrets and other proprietary information.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">65</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In addition to the protection afforded by patents, we rely on trade secret protection and confidentiality agreements to protect proprietary know-how that is not patentable or that we elect not to patent, processes for which patents are difficult to enforce and any other elements of our platform technology and discovery and development processes that involve proprietary know-how, information or technology that is not covered by patents. However, trade secrets can be difficult to protect. We seek to protect our proprietary technology and processes, in part, by entering into confidentiality agreements with our employees, consultants and outside scientific advisors, contractors and partners. We cannot guarantee that we have entered into such agreement with each party that may have or have had access to our trade secrets or proprietary technology and processes. Additionally, our confidentiality agreements and other contractual protections may not be adequate to protect our intellectual property from unauthorized disclosure, third-party infringement or misappropriation. We may not have adequate remedies in the case of a breach of any such agreements, and our trade secrets and other proprietary information could be disclosed to our competitors or others may independently develop substantially equivalent or superior proprietary information and techniques or otherwise gain access to our trade secrets or disclose such technologies.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Enforcing a claim that a third party illegally obtained and is using any of our trade secrets is expensive and time consuming, and the outcome is unpredictable. In addition, some courts outside and within the United States sometimes are less willing to protect trade secrets. Misappropriation or unauthorized disclosure of our trade secrets could impair our competitive position and may have a material adverse effect on our business.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We may be subject to claims by third parties asserting that our licensors, employees, consultants, advisors or we have misappropriated their intellectual property, or claiming ownership of what we regard as our own intellectual property.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Many of our and our licensors&#8217; employees, including our senior management, consultants or advisors are currently, or previously were, employed at universities or other biotechnology or pharmaceutical companies, including our competitors or potential competitors. Some of these employees, including members of our senior management, executed proprietary rights, non-disclosure and non-competition agreements, or similar agreements, in connection with such previous employment. Although we try to ensure that our employees, consultants and advisors do not use the proprietary information or know-how of others in their work for us, we may be subject to claims that we or these individuals have used or disclosed intellectual property, including trade secrets or other proprietary information, of any such individual&#8217;s current or former employer. Litigation may be necessary to defend against such claims. If we fail in defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights or personnel or sustain damages. Such intellectual property rights could be awarded to a third party, and we could be required to obtain a license from such third party to commercialize our technology or products. Such a license may not be available on commercially reasonable terms or at all. Even if we are successful in defending against such claims, litigation could result in substantial costs and be a distraction to management. Any of the foregoing may have a material adverse effect on our business, financial condition, results of operations and prospects.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In addition, while it is our policy to require our employees and contractors who may be involved in the conception or development of intellectual property to execute agreements assigning such intellectual property to us, we may be unsuccessful in executing such an agreement with each party who, in fact, conceives or develops intellectual property that we regard as our own. The assignment of intellectual property rights may not be self-executing or the assignment agreements may be breached, and we may be forced to bring claims against third parties, or defend claims that they may bring against us, to determine the ownership of what we regard as our intellectual property.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">If we do not obtain patent term extension and data exclusivity for any product candidates we may develop, our business may be materially harmed.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">66</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Depending upon the timing, duration and specifics of any FDA marketing approval of any product candidates we may develop, one or more of our owned or in-licensed U.S. patents may be eligible for limited patent term extension under the Drug Price Competition and Patent Term Restoration Act of 1984, or Hatch-Waxman Amendments. The Hatch-Waxman Amendments permit a patent term extension of up to five years as compensation for the patent term lost during the FDA regulatory review process. A patent term extension cannot extend the remaining term of a patent beyond a total of 14 years from the date of product approval, only one patent may be extended and only those claims covering the approved drug, a method for using it or a method for manufacturing it may be extended. However, we may not be granted an extension because of, for example, failing to exercise due diligence during the testing phase or regulatory review process, failing to apply within applicable deadlines, failing to apply prior to expiration of relevant patents, or otherwise failing to satisfy applicable requirements. Moreover, the applicable time period or the scope of patent protection afforded could be less than we request. If we are unable to obtain patent term extension or the term of any such extension is less than we request, our competitors may obtain approval of competing products following our patent expiration, and our business, financial condition, results of operations and prospects could be materially harmed.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Obtaining and maintaining our patent protection depends on compliance with various procedural, document submission, fee payment, and other requirements imposed by government patent agencies, and our patent protection could be reduced or eliminated for non-compliance with these requirements.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Periodic maintenance fees, renewal fees, annuity fees and various other government fees on patents and patent applications will be due to be paid to the USPTO and various government patent agencies outside of the United States over the lifetime of our owned or licensed patents and applications. In certain circumstances, we rely on our licensing partners to pay these fees due to U.S. and non-U.S. patent agencies. The USPTO and various non-U.S. government agencies require compliance with several procedural, documentary, fee payment and other similar provisions during the patent application process. We are also dependent on our licensors to take the necessary action to comply with these requirements with respect to our licensed intellectual property. In some cases, an inadvertent lapse can be cured by payment of a late fee or by other means in accordance with the applicable rules. There are situations, however, in which non-compliance can result in abandonment or lapse of the patent or patent application, resulting in a partial or complete loss of patent rights in the relevant jurisdiction. In such an event, potential competitors might be able to enter the market with similar or identical products or technology, which could have a material adverse effect on our business, financial condition, results of operations and prospects.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Intellectual property rights do not necessarily address all potential threats.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The degree of future protection afforded by our intellectual property rights is uncertain because intellectual property rights have limitations and may not adequately protect our business or permit us to maintain our competitive advantage. For example:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">others may be able to make ADC products that are similar to any product candidates we may develop or utilize similar ADC-related technology but that are not covered by the claims of the patents that we license or may own in the future;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">we, or our license partners or current or future strategic partners, might not have been the first to make the inventions covered by the issued patent or pending patent application that we license or may own in the future;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">we, or our license partners or current or future strategic partners, might not have been the first to file patent applications covering certain of our or their inventions;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">others may independently develop similar or alternative technologies or duplicate any of our technologies without infringing our owned or licensed intellectual property rights;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">it is possible that our pending licensed patent applications or those that we may own in the future will not lead to issued patents;</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">67</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">issued patents that we hold rights to may be held invalid or unenforceable, including as a result of legal challenges by our competitors;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">our competitors might conduct research and development activities in countries where we do not have patent rights and then use the information learned from such activities to develop competitive products for sale in our major commercial markets;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">we may not develop additional proprietary technologies that are patentable;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the patents of others may harm our business; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">we may choose not to file a patent in order to maintain certain trade secrets or know how, and a third party may subsequently file a patent covering such intellectual property.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Should any of these events occur, they could have a material adverse effect on our business, financial condition, results of operations and prospects.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Risks Related to Regulatory Approval and Other Legal Compliance Matters</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Even if we complete the necessary preclinical studies and clinical trials, the regulatory approval process is expensive, time consuming and uncertain and may prevent us from obtaining approvals for the commercialization of some or all of our product candidates. As a result, we cannot predict when or if, and in which territories, we will obtain marketing approval to commercialize a product candidate.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The research, testing, manufacturing, labeling, approval, selling, marketing, promotion and distribution of products are subject to extensive regulation by the FDA and comparable foreign regulatory authorities. We are not permitted to market our product candidates in the United States or in other countries until we receive approval of a biologics licensing application, or BLA, from the FDA or marketing approval from applicable regulatory authorities outside the United States. Our product candidates are in various stages of development and are subject to the risks of failure inherent in development. We have not submitted an application for or received marketing approval for any of our product candidates in the United States or in any other jurisdiction. We have no experience as a company in filing and supporting the applications necessary to gain marketing approvals and expect to rely on third-party CROs to assist us in this process.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The process of obtaining marketing approvals, both in the United States and abroad, is lengthy, expensive and uncertain. It may take many years, if approval is obtained at all, and can vary substantially based upon a variety of factors, including the type, complexity and novelty of the product candidates involved. Securing marketing approval requires the submission of extensive preclinical and clinical data and supporting information, including manufacturing information, to regulatory authorities for each therapeutic indication to establish the product candidate&#8217;s safety and efficacy. The FDA or other regulatory authorities may determine that our product candidates are not safe and effective, only moderately effective or have undesirable or unintended side effects, toxicities or other characteristics that preclude our obtaining marketing approval or prevent or limit commercial use.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In addition, changes in marketing approval policies during the development period, changes in or the enactment or promulgation of additional statutes, regulations or guidance or changes in regulatory review for each submitted product application, may cause delays in the approval or rejection of an application. Regulatory authorities have substantial discretion in the approval process and varying interpretations of the data obtained from preclinical and clinical testing could delay, limit or prevent marketing approval of a product candidate. Any marketing approval we ultimately obtain may be limited or subject to restrictions or post-approval commitments that render the approved product not commercially viable.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">68</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Failure to obtain marketing approval in foreign jurisdictions would prevent our product candidates from being marketed abroad. Any approval we may be granted for our product candidates in the United States would not assure approval of our product candidates in foreign jurisdictions and any of our product candidates that may be approved for marketing in a foreign jurisdiction will be subject to risks associated with foreign operations.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We intend to market our current product candidates, UpRi, XMT-1660 and XMT-2056, if approved, in international markets either directly or through partnerships. In order to market and sell our products in the European Union and other foreign jurisdictions, we must obtain separate marketing approvals and comply with numerous and varying regulatory requirements. The approval procedure varies among countries and can involve additional testing. The time required to obtain approval may differ substantially from that required to obtain FDA approval. The marketing approval process outside the United States generally includes all of the risks associated with obtaining FDA approval. We may not obtain approvals from regulatory authorities outside the United States on a timely basis, if at all. Approval by the FDA does not ensure approval by regulatory authorities in other countries or jurisdictions, and approval by one regulatory authority outside the United States does not ensure approval by regulatory authorities in other countries or jurisdictions or by the FDA. We may file for marketing approvals but not receive necessary approvals to commercialize our products in any market.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In many countries outside the United States, a product candidate must also be approved for reimbursement before it can be sold in that country. In some cases, the price that we intend to charge for our products, if approved, is also subject to approval. Obtaining non-U.S. regulatory approvals and compliance with non-U.S. regulatory requirements could result in significant delays, difficulties and costs for us and could delay or prevent the introduction of our product candidates in certain countries. In addition, if we fail to obtain the non-U.S. approvals required to market our product candidates outside the United States or if we fail to comply with applicable non-U.S. regulatory requirements, our target markets will be reduced and our ability to realize the full market potential of our product candidates will be harmed and our business, financial condition, results of operations and prospects may be adversely affected.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Additionally, we could face heightened risks with respect to seeking marketing approval in the United Kingdom as a result of the withdrawal of the United Kingdom from the European Union, commonly referred to as Brexit. The United Kingdom is no longer part of the European Single Market and European Union Customs Union. As of January 1, 2021, the Medicines and Healthcare products Regulatory Agency, or the MHRA, became responsible for supervising medicines and medical devices in Great Britain, comprising England, Scotland and Wales under domestic law, whereas Northern Ireland will continue to be subject to European Union rules under the Northern Ireland Protocol. Any delay in obtaining, or an inability to obtain, any marketing approvals, as a result of Brexit or otherwise, may force us to restrict or delay efforts to seek regulatory approval in the United Kingdom for our product candidates, which could significantly and materially harm our business.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We expect that we will be subject to additional risks in commercializing any of our product candidates that receive marketing approval outside the United States, including tariffs, trade barriers and regulatory requirements; economic weakness, including inflation, or political instability in particular foreign economies and markets; compliance with tax, employment, immigration and labor laws for employees living or traveling abroad; foreign currency fluctuations, which could result in increased operating expenses and reduced revenue, and other obligations incident to doing business in another country; and workforce uncertainty in countries where labor unrest is more common than in the United States.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Any product candidate for which we obtain marketing approval is subject to ongoing regulation and could be subject to restrictions or withdrawal from the market, and we may be subject to substantial penalties if we fail to comply with regulatory requirements, when and if any of our product candidates are approved. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Any product candidate for which we obtain marketing approval will be subject to continual requirements of and review by the FDA and other regulatory authorities. These requirements include submissions of safety and other post-marketing information and reports, registration and listing requirements, cGMP requirements relating to quality control and manufacturing, quality assurance and corresponding maintenance of records and documents, and requirements regarding the distribution of samples to physicians and recordkeeping. In addition, the approval may </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">69</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">be subject to limitations on the indicated uses for which the product may be marketed or to the conditions of approval, or contain requirements for costly post-marketing testing and surveillance to monitor the safety or efficacy of the medicine, including the requirement to implement a risk evaluation and mitigation strategy. Accordingly, if we receive marketing approval for one or more of our product candidates, we will continue to expend time, money and effort in all areas of regulatory compliance, including manufacturing, production, product surveillance and quality control. If we fail to comply with these requirements, we could have the marketing approvals for our products withdrawn by regulatory authorities and our ability to market any products could be limited, which could adversely affect our ability to achieve or sustain profitability.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We must also comply with requirements concerning advertising and promotion for any of our product candidates for which we obtain marketing approval. Promotional communications with respect to prescription products are subject to a variety of legal and regulatory restrictions and must be consistent with the information in the product&#8217;s approved labeling. Thus, we will not be able to promote any products we develop for indications or uses for which they are not approved. The FDA and other agencies, including the Department of Justice, or the DOJ, closely regulate and monitor the post-approval marketing and promotion of products to ensure that they are marketed and distributed only for the approved indications and in accordance with the provisions of the approved labeling. In September 2021, the FDA published final regulations which describe the types of evidence that the agency will consider in determining the intended use of a drug or biologic. Violations of the Federal Food, Drug, and Cosmetic Act and other statutes, including the False Claims Act, relating to the promotion and advertising of prescription products may lead to investigations and enforcement actions alleging violations of federal and state health care fraud and abuse laws, as well as state consumer protection laws.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Failure to comply with regulatory requirements, may yield various results, including:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">restrictions on such products, manufacturers or manufacturing processes;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">restrictions on the labeling or marketing of a product;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">restrictions on distribution or use of a product;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">requirements to conduct post-marketing studies or clinical trials;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">warning letters or untitled letters;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">withdrawal of the products from the market;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">refusal to approve pending applications or supplements to approved applications that we submit;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">recall of products;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">damage to relationships with collaborators;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">unfavorable press coverage and damage to our reputation;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">fines, restitution or disgorgement of profits or revenues;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">suspension or withdrawal of marketing approvals;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">refusal to permit the import or export of our products;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">product seizure;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">injunctions or the imposition of civil or criminal penalties; and</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">70</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">litigation involving patients using our products.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Similar restrictions apply to the approval of our products in the European Union. The holder of a marketing authorization is required to comply with a range of requirements applicable to the manufacturing, marketing, promotion and sale of medicinal products. These include compliance with the European Union&#8217;s stringent pharmacovigilance or safety reporting rules, which can impose post-authorization studies and additional monitoring obligations; the manufacturing of authorized medicinal products, for which a separate manufacturer&#8217;s license is mandatory; and the marketing and promotion of authorized drugs, which are strictly regulated in the European Union and are also subject to EU Member State laws.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Accordingly, in connection with our currently approved products and assuming we, or our collaborators, receive marketing approval for one or more of our product candidates, we, and our collaborators, and our and their contract manufacturers will continue to expend time, money and effort in all areas of regulatory compliance, including manufacturing, production, product surveillance and quality control. If we, and our collaborators, are not able to comply with post-approval regulatory requirements, our or our collaborators&#8217; ability to market any future products could be limited, which could adversely affect our ability to achieve or sustain profitability. Further, the cost of compliance with post-approval regulations may have a negative effect on our operating results and financial condition.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We may seek certain designations for our product candidates, including but not limited to Breakthrough Therapy, Fast Track and Priority Review designations in the United States, and PRIME Designation in the European Union, but we might not receive such designations, and even if we do, such designations may not lead to a faster development or regulatory review or approval process.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We may seek certain designations for one or more of our product candidates that could expedite review and approval by the FDA. A Breakthrough Therapy product is defined as a product that is intended, alone or in combination with one or more other products, to treat a serious condition, and preliminary clinical evidence indicates that the product may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development. For products that have been designated as Breakthrough Therapies, interaction and communication between the FDA and the sponsor of the trial can help to identify the most efficient path for clinical development while minimizing the number of patients placed in ineffective control regimens.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The FDA may also designate a product for Fast Track review if it is intended, whether alone or in combination with one or more other products, for the treatment of a serious or life threatening disease or condition, and it demonstrates the potential to address unmet medical needs for such a disease or condition. For Fast Track products, sponsors may have greater interactions with the FDA and the FDA may initiate review of sections of a Fast Track product&#8217;s application before the application is complete. This rolling review may be available if the FDA determines, after preliminary evaluation of clinical data submitted by the sponsor, that a Fast Track product may be effective. The FDA has granted Fast Track designation for UpRi for the treatment of patients with platinum-resistant high-grade serous ovarian cancer who have received up to three prior lines of systemic therapy or patients who have received four prior lines of systemic therapy regardless of platinum status, and the FDA has granted Fast Track designation for XMT-1660 for the treatment of adult patients with advanced or metastatic triple-negative breast cancer.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We may also seek a priority review designation for one or more of our product candidates. If the FDA determines that a product candidate offers major advances in treatment or provides a treatment where no adequate therapy exists, the FDA may designate the product candidate for priority review. A priority review designation means that the goal for the FDA to review an application is six months, rather than the standard review period of ten months.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">These designations are within the discretion of the FDA. Accordingly, even if we believe that one of our product candidates meets the criteria for these designations, the FDA may disagree and instead determine not to make such designation. Further, even if we receive a designation, the receipt of such designation for a product candidate may not result in a faster development or regulatory review or approval process compared to products considered for approval under conventional FDA procedures and does not assure ultimate approval by the FDA. In addition, even if </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">71</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">one or more of our product candidates qualifies for these designations, the FDA may later decide that the product candidates no longer meet the conditions for qualification or decide that the time period for FDA review or approval will not be shortened.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In the European Union, we may seek PRIME designation for our product candidates in the future. PRIME is a voluntary program aimed at enhancing the EMA&#8217;s role to reinforce scientific and regulatory support in order to optimize development and enable accelerated assessment of new medicines that are of major public health interest with the potential to address unmet medical needs. The program focuses on medicines that target conditions for which there exists no satisfactory method of treatment in the European Union or even if such a method exists, it may offer a major therapeutic advantage over existing treatments. PRIME is limited to medicines under development and not authorized in the European Union and the applicant intends to apply for an initial marketing authorization application through the centralized procedure. To be accepted for PRIME, a product candidate must meet the eligibility criteria in respect of its major public health interest and therapeutic innovation based on information that is capable of substantiating the claims.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The benefits of a PRIME designation include the appointment of a CHMP rapporteur to provide continued support and help to build knowledge ahead of a marketing authorization application, early dialogue and scientific advice at key development milestones, and the potential to qualify products for accelerated review, meaning reduction in the review time for an opinion on approvability to be issued earlier in the application process. PRIME enables an applicant to request parallel EMA scientific advice and health technology assessment advice to facilitate timely market access. Even if we receive PRIME designation for any of our product candidates, the designation may not result in a materially faster development process, review or approval compared to conventional EMA procedures. Further, obtaining PRIME designation does not assure or increase the likelihood of EMA&#8217;s grant of a marketing authorization.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We have received an orphan drug designation for XMT-2056, but we may not be able to obtain orphan drug exclusivity for one or more of our product candidates, and even if we do, that exclusivity may not prevent the FDA or EMA from approving other competing products.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Under the Orphan Drug Act, the FDA may designate a product as an orphan drug if it is a drug or biologic intended to treat a rare disease or condition. A similar regulatory scheme governs approval of orphan products by the EMA in the European Union. Generally, if a product candidate with an orphan drug designation subsequently receives the first marketing approval for the indication for which it has such designation, the product is entitled to a period of marketing exclusivity, which precludes the FDA or EMA from approving another marketing application for the same product for the same therapeutic indication for that time period. The applicable period is seven years in the United States and ten years in the European Union. The exclusivity period in the European Union can be reduced to six years if a product no longer meets the criteria for orphan drug designation, in particular if the product is sufficiently profitable so that market exclusivity is no longer justified.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In order for the FDA to grant orphan drug exclusivity to one of our products, the agency must find that the product is indicated for the treatment of a condition or disease with a patient population of fewer than 200,000 individuals annually in the United States. The FDA may conclude that the condition or disease for which we seek orphan drug exclusivity does not meet this standard. Even if we obtain orphan drug exclusivity for a product, that exclusivity may not effectively protect the product from competition because different products can be approved for the same condition. In particular, the concept of what constitutes the &#8220;same drug&#8221; for purposes of orphan drug exclusivity remains in flux in the context of gene therapies, and the FDA issued final guidance suggesting that it would not consider two genetic medicine products to be different drugs solely based on minor differences in the transgenes or vectors within a given vector class. In addition, even after an orphan drug is approved, the FDA can subsequently approve the same product for the same condition if the FDA concludes that the later product is clinically superior in that it is shown to be safer, more effective or makes a major contribution to patient care. Orphan drug exclusivity may also be lost if the FDA or EMA determines that the request for designation was materially defective or if the manufacturer is unable to assure sufficient quantity of the product to meet the needs of the patients with the rare disease or condition. In May 2022, the FDA granted orphan drug designation to XMT-2056 for the treatment of patients with gastric cancer.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">72</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In 2017, Congress passed FDA Reauthorization Act of 2017, or FDARA. FDARA, among other things, codified the FDA&#8217;s pre-existing regulatory interpretation, to require that a drug sponsor demonstrate the clinical superiority of an orphan drug that is otherwise the same as a previously approved drug for the same rare disease in order to receive orphan drug exclusivity. Under Omnibus legislation signed by President Trump on December 27, 2020, the requirement for a product to show clinical superiority applies to drugs and biologics that received orphan drug designation before enactment of FDARA in 2017 but have not yet been approved or licensed by the FDA.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The FDA and Congress may further reevaluate the Orphan Drug Act and its regulations and policies.  This may be particularly true in light of a decision from the Court of Appeals for the 11th Circuit in September 2021 finding that, for the purpose of determining the scope of exclusivity, the term &#8220;same disease or condition&#8221; means the designated &#8220;rare disease or condition&#8221; and could not be interpreted by the FDA to mean the &#8220;indication or use.&#8221; The court concluded that orphan drug exclusivity applies to the entire designated disease or condition rather than the &#8220;indication or use.&#8221; We do not know if, when, or how the FDA or Congress may change the orphan drug regulations and policies in the future, and it is uncertain how any changes might affect our business. Depending on what changes the FDA may make to its orphan drug regulations and policies, our business could be adversely impacted.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Inadequate funding for the FDA, the SEC and other government agencies, including from government shut downs, or other disruptions to these agencies&#8217; operations, could hinder their ability to hire and retain key leadership and other personnel, prevent new products and services from being developed or commercialized in a timely manner or otherwise prevent those agencies from performing normal business functions on which the operation of our business may rely, which could negatively impact our business.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The ability of the FDA to review and approve new products can be affected by a variety of factors, including government budget and funding levels, ability to hire and retain key personnel and accept the payment of user fees, and statutory, regulatory and policy changes. Average review times at the agency have fluctuated in recent years as a result. Disruptions at the FDA and other agencies may also slow the time necessary for new product candidates to be reviewed and/or approved by necessary government agencies, which would adversely affect our business. In addition, government funding of the SEC and other government agencies on which our operations may rely, including those that fund research and development activities, is subject to the political process, which is inherently fluid and unpredictable.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Disruptions at the FDA and other agencies may also slow the time necessary for new product candidates to be reviewed and/or approved by necessary government agencies, which would adversely affect our business. For example, over the last several years the U.S. government has shut down several times and certain regulatory agencies, such as the FDA and the SEC, have had to furlough critical FDA, SEC and other government employees and stop critical activities. If a prolonged government shutdown occurs, it could significantly impact the ability of the FDA to timely review and process our regulatory submissions, which could have a material adverse effect on our business. Further, future government shutdowns could impact our ability to access the public markets and obtain necessary capital in order to properly capitalize and continue our operations.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Separately, in response to the COVID-19 pandemic, a number of companies announced receipt of complete response letters due to the FDA&#8217;s inability to complete required inspections for their applications. As of May 26, 2021, the FDA noted it was continuing to ensure timely reviews of applications for medical products during the ongoing COVID-19 pandemic in line with its user fee performance goals and conducting mission critical domestic and foreign inspections to ensure compliance of manufacturing facilities with FDA quality standards. However, the FDA may not be able to continue its current pace and review timelines could be extended, including where a pre-approval inspection or an inspection of clinical sites is required and due to the ongoing COVID-19 pandemic and travel restrictions, the FDA is unable to complete such required inspections during the review period. Regulatory authorities outside the United States may adopt similar restrictions or other policy measures in response to the COVID-19 pandemic and may experience delays in their regulatory activities. If a prolonged government shutdown or other disruption occurs, it could significantly impact the ability of the FDA to timely review and process our regulatory submissions, which could have a material adverse effect on our business. Future shutdowns or other disruptions could also affect other government agencies such as the SEC, which may also impact our business by </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">73</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">delaying review of our public filings, to the extent such review is necessary, and our ability to access the public markets.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We are currently conducting clinical trials for UpRi, and may conduct future clinical trials for our other product candidates, at sites outside of the United States. The FDA may not accept data from trials conducted in such locations, or the complexity of regulatory burdens may otherwise adversely impact us.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We are currently conducting and we plan to continue to conduct clinical trials outside of the United States. Although the FDA may accept data from clinical trials conducted outside the United States, acceptance of these data is subject to conditions imposed by the FDA. For example, the clinical trial must be well designed and conducted and be performed by qualified investigators in accordance with GCPs. If the foreign data is the sole basis for a marketing application, then the data must be applicable to the U.S. population and U.S. medical practice in ways that the FDA deems clinically meaningful and the FDA must be able to validate the data through an on-site inspection, if necessary. In addition, while these clinical trials are subject to the applicable local laws, FDA acceptance of the data will depend on its determination that the trials also complied with all applicable U.S. laws and regulations. If the FDA does not accept the data from any clinical trial that we conduct outside the United States, it would likely result in the need for additional clinical trials, which would be costly and time-consuming and could delay or permanently halt our development of the applicable product candidates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our ability to successfully initiate, enroll and complete a clinical trial in any country outside of the United States is subject to numerous additional risks unique to conducting business in jurisdictions outside the United States, including:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">difficulty in establishing or managing relationships with qualified CROs, physicians and clinical trial sites;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">different local standards for the conduct of clinical trials;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">difficulty in complying with various and complex import laws and regulations when shipping drug to certain countries;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the potential burden of complying with a variety of laws, medical standards and regulatory requirements, including the regulation of pharmaceutical and biotechnology products and treatments;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">lack of consistency in standard of care from country to country;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">diminished protection of intellectual property in some countries;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">foreign exchange fluctuations;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">cultural differences in medical practice and clinical research; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">changes in country or regional regulatory requirements.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Furthermore, the ongoing COVID-19 pandemic and the current conflict between Russia and Ukraine may also have an impact on our ability to successfully conduct trials outside of the United States. For example, we are conducting UPLIFT in countries where clinical trial site staff have been diverted to care for COVID-19 patients and where regulatory authorities are short staffed due to the COVID-19 pandemic. Additionally, we do business with a CRO that has had employees and operations in Ukraine that have been adversely impacted by Russian hostilities, though such employees and operations are not directly involved with our clinical trials. If we have difficulty conducting our clinical trials in jurisdictions outside the United States as planned, we may need to delay, limit or terminate ongoing or planned clinical trials, any of which could have a material adverse effect on our business.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">74</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Accelerated approval by the FDA, even if granted for UpRi or any other current or future product candidates, may not lead to a faster development or regulatory review or approval process and it does not increase the likelihood that our product candidates will receive marketing approval.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We may seek approval of UpRi and any of our other current and future product candidates using the FDA&#8217;s accelerated approval pathway. A product may be eligible for accelerated approval if it treats a serious or life-threatening condition, generally provides a meaningful advantage over available therapies, and demonstrates an effect on a surrogate endpoint that is reasonably likely to predict clinical benefit. The FDA or other applicable regulatory agency makes the determination regarding whether a surrogate endpoint is reasonably likely to predict long-term clinical benefit.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Prior to seeking such accelerated approval, we will seek feedback from the FDA and otherwise evaluate our ability to seek and receive such accelerated approval. As a condition of approval, the FDA requires that a sponsor of a product receiving accelerated approval perform an adequate and well-controlled post-marketing confirmatory clinical trial or trials. These confirmatory trials must be completed with due diligence and we may be required to evaluate different or additional endpoints in these post-marketing confirmatory trials. These confirmatory trials may require enrollment of more patients than we currently anticipate and will result in additional costs, which may be greater than the estimated costs we currently anticipate. In addition, the FDA currently requires as a condition for accelerated approval preapproval of promotional materials, which could adversely impact the timing of the commercial launch of the product.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">There can be no assurance that the FDA will agree with any proposed surrogate endpoints or that we will decide to pursue or submit an BLA for accelerated approval or any other form of expedited development, review or approval. Similarly, there can be no assurance that, after feedback from FDA, we will continue to pursue or apply for accelerated approval or any other form of expedited development, review or approval, even if we initially decide to do so. Furthermore, if we decide to submit an application for accelerated approval or under another expedited regulatory designation, there can be no assurance that such submission or application will be accepted or that any expedited review or approval will be granted on a timely basis, or at all.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The FDA may withdraw approval of a product candidate approved under the accelerated approval pathway if, for example, the trial required to verify the predicted clinical benefit of our product candidate fails to verify such benefit or does not demonstrate sufficient clinical benefit to justify the risks associated with the drug. The FDA may also withdraw approval if other evidence demonstrates that our product candidate is not shown to be safe or effective under the conditions of use, we fail to conduct any required post approval trial of our product candidate with due diligence or we disseminate false or misleading promotional materials relating to our product candidate. A failure to obtain accelerated approval or any other form of expedited development, review or approval for our product candidates, or withdrawal of a product candidate, would result in a longer time period for commercialization of such product candidate, could increase the cost of development of such product candidate and could harm our competitive position in the marketplace.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Even if we do receive accelerated approval, we may not experience a faster development or regulatory review or approval process, and receiving accelerated approval does not provide assurance of ultimate full FDA approval.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">If we or our third-party collaborators are unable to successfully develop and commercialize any required companion diagnostics for our product candidates or engage a third party to do so, or we or they experience significant delays in doing so, we may not realize the full potential of our product candidates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">If a companion diagnostic is required for the label for UpRi or any of our other current or future product candidates, therefore conditioning our ability to market such product candidates on the commercial availability of an approved companion diagnostic, we may seek approval for our validated assay as a companion diagnostic or we may contract with third parties to create and obtain approval for a companion diagnostic. To be successful in developing and commercializing such a companion diagnostic, we need to address a number of scientific, technical and logistical challenges. We have little experience in the development and commercialization of companion diagnostics and may not be successful in developing and commercializing appropriate companion diagnostics to pair with UpRi or any of </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">75</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">our other current or future product candidates. Companion diagnostics are subject to regulation by the FDA and equivalent foreign regulatory authorities as medical devices and require separate regulatory approval prior to commercialization. Given our limited experience in developing diagnostics, we may rely in part or in whole on third parties for their design, manufacture and commercialization. We, our collaborators or such third parties may encounter difficulties in developing and obtaining approval for the companion diagnostics, including issues relating to selectivity/specificity, analytical validation, reproducibility or clinical validation. Any delay or failure by us, our collaborators or such third parties to develop or obtain regulatory approval of the companion diagnostics could delay or prevent approval of our product candidates. If we, or any third parties that we may contract with to assist us, are unable to successfully develop and commercialize companion diagnostics for our product candidates, or experience delays in doing so:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the development of UpRi, and our other current or future product candidates may be adversely affected if we are unable to appropriately select patients for enrollment in our clinical trials;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">our product candidates may not receive marketing approval if safe and effective use of a product candidate depends on the availability of a companion diagnostic and/or complementary diagnostics and such diagnostic is not commercially available or otherwise approved or cleared by the appropriate regulatory authority; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">we may not realize the full commercial potential of any product candidates that receive marketing approval if, among other reasons, we are unable to appropriately select patients who are likely to benefit from therapy with our products, if approved.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">If any of these events were to occur, our business would be harmed, possibly materially.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In addition, third-party collaborators may encounter production difficulties that could constrain the supply of the companion diagnostics, and both they and we may have difficulties gaining acceptance of the use of the companion diagnostics in the clinical community. If such companion diagnostics fail to gain market acceptance, it would have an adverse effect on our ability to derive revenues from sales of our product candidates, if approved. In addition, any diagnostic company with whom we contract may decide to discontinue selling or manufacturing the companion diagnostic that we anticipate using in connection with development and commercialization of our product candidates or our relationship with such diagnostic company may otherwise terminate. We may not be able to enter into arrangements with another diagnostic company to obtain supplies of an alternative diagnostic test for use in connection with the development and commercialization of our product candidates or do so on commercially reasonable terms, which could adversely affect and/or delay the development or commercialization of our product candidates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Our activities, including our interactions with healthcare providers, third party payors, patients and government officials, are, and will continue to be, subject to extensive regulation involving health care, anti-corruption, data privacy and security and consumer protection laws. Failure to comply with applicable laws could result in substantial penalties, contractual damages, reputational harm, diminished revenues and curtailment or restructuring of our operations.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our activities may now or in the future be directly or indirectly subject to various federal and state laws related to health care, anti-corruption, data privacy and security consumer protection. If we obtain FDA approval for any of our product candidates and begin commercializing those products in the United States, our potential exposure under such laws will increase significantly, and our costs associated with compliance with such laws are also likely to increase. These laws include, but are not limited to:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">federal false claims, false statements and civil monetary penalties laws prohibiting, among other things, any person from knowingly presenting, or causing to be presented, a false claim for payment of government funds or knowingly making, or causing to be made, a false statement to get a false claim paid;</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">76</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the federal anti-kickback law, which prohibits, among other things, persons from offering, soliciting, receiving or providing any remuneration, directly or indirectly, to induce, either the referral of an individual for, or the purchasing or ordering of a good or service, for which payment may be made under federal health care programs such as the Medicare and Medicaid;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the federal anti-kickback prohibition known as Eliminating Kickbacks in Recovery Act, enacted in 2018, which prohibits certain payments related to referrals of patients to certain providers (recovery homes, clinical treatment facilities and laboratories) and applies to services reimbursed by private health plans as well as government health care programs;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the federal law known as Health Insurance Portability and Accountability Act of 1996, or HIPAA, which, in addition to privacy protections to healthcare providers and other entities, prohibits executing a scheme to defraud any healthcare benefit program (which may include private health plans) or making false statements relating to healthcare matters;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the Food, Drug, and Cosmetic Act, which among other things, strictly regulates drug marketing, prohibits manufacturers from marketing such products for off-label use and regulates the distribution of samples;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">federal laws that require pharmaceutical manufacturers to report certain calculated product prices to the government or provide certain discounts or rebates to government authorities or private entities, often as a condition of reimbursement under government healthcare programs;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the so-called &#8220;federal sunshine&#8221; law, which requires pharmaceutical and medical device companies to monitor and report certain financial interactions with teaching hospitals, physicians and certain non-physician practitioners to the federal government for re-disclosure to the public;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the privacy, security and breach provisions of HIPAA, which impose obligations on certain &#8220;covered entities&#8221; (healthcare providers, health plans and healthcare clearinghouses) and certain of their &#8220;business associate&#8221; contractors with respect to safeguarding the privacy, security and transmission of individually identifiable health information;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">federal and state laws and regulations, including state security breach notification laws, state health information privacy laws, and federal and state consumer protection laws, govern the collection, use, disclosure and protection of health-related and other personal information.</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">federal consumer protection and unfair competition laws, which broadly regulate marketplace activities and activities that potentially harm consumers;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the Foreign Corrupt Practices Act, or FCPA, a United States law which regulates certain financial relationships with foreign government officials (which could include, for example, certain medical professionals); and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">state law analogues of each of the above federal laws, such as anti-kickback and false claims laws which may apply to items or services reimbursed by any third-party payor, including private health plans, state privacy laws, state consumer protection laws, and state laws regulating interactions between pharmaceutical manufacturers and healthcare providers, requiring disclosure of such financial interactions or mandating adoption of certain compliance standards, many of which differ from each other in significant ways and often are not preempted by federal laws, thus complicating compliance efforts.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In addition, the regulatory approval and commercialization of any of our product candidates outside the United States will also likely subject us to foreign equivalents of the health care laws mentioned above, among other foreign laws.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">77</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Efforts to ensure that our business arrangements will comply with applicable health care laws may involve substantial costs. It is possible that governmental and enforcement authorities will conclude that our business practices may not comply with current or future statutes, regulations or case law interpreting applicable fraud and abuse or other health care laws and regulations. If our operations are found to be in violation of any of the laws described above or any other governmental regulations that apply to us, we may be subject to penalties, including, without limitation, civil, criminal and administrative penalties, damages, monetary fines, disgorgement, possible exclusion from participation in Medicare, Medicaid and other federal health care programs, contractual damages, reputational harm, diminished profits and future earnings and curtailment or restructuring of our operations.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Current and future legislation may increase the difficulty and cost for us to obtain reimbursement for our product candidates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In the United States and some foreign jurisdictions, there have been and continue to be a number of legislative and regulatory changes and proposed changes regarding the healthcare system that could, among other things, prevent or delay marketing approval of our product candidates, restrict or regulate post-approval activities and affect our ability to profitably sell any products for which we obtain marketing approval. We expect that current laws, as well as other healthcare reform measures that may be adopted in the future, may result in more rigorous coverage criteria and in additional downward pressure on the price that we may receive for any approved products. If reimbursement of our products is unavailable or limited in scope, our business could be materially harmed.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In March 2010, President Obama signed into law the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Affordability Reconciliation Act, collectively the ACA. In addition, other legislative changes have been proposed and adopted since the ACA was enacted. In August 2011, the Budget Control Act of 2011, among other things, created measures for spending reductions by Congress. A Joint Select Committee on Deficit Reduction, tasked with recommending a targeted deficit reduction of at least $1.2 trillion for the years 2013 through 2021, was unable to reach required goals, thereby triggering the legislation&#8217;s automatic reduction to several government programs. These changes included aggregate reductions to Medicare payments to providers of up to 2% per fiscal year, which went into effect in April 2013 and will remain in effect through 2031 under the Coronavirus Aid, Relief, and Economic Security Act, or the CARES Act. These Medicare sequester reductions were suspended through the end of March 2022. From April 2022 through June 2022, a 1% sequester cut was in effect, with the full 2% cut resuming thereafter. The American Taxpayer Relief Act of 2012, among other things, reduced Medicare payments to several providers and increased the statute of limitations period for the government to recover overpayments to providers from three to five years. These laws may result in additional reductions in Medicare and other healthcare funding and otherwise affect the prices we may obtain for any of our products or product candidates for which we may obtain regulatory approval or the frequency with which any such product is prescribed or used.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Since enactment of the ACA, there have been and continue to be, numerous legal challenges and Congressional actions to repeal and replace provisions of the law. For example, with enactment of the Tax Cuts for Jobs Act, or TCJA, in 2017, Congress repealed the &#8220;individual mandate.&#8221; The repeal of this provision, which requires most Americans to carry a minimal level of health insurance, became effective in 2019. Further, on December 14, 2018, a U.S. District Court judge in the Northern District of Texas ruled that the individual mandate portion of the ACA is an essential and inseverable feature of the ACA and therefore because the mandate was repealed as part of the TCJA, the remaining provisions of the ACA are invalid as well. The U.S. Supreme Court heard this case on November 10, 2020 and on June 17, 2021, dismissed this action after finding that the plaintiffs do not have standing to challenge the constitutionality of the ACA. Litigation and legislation over the ACA are likely to continue, with unpredictable and uncertain results.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Trump Administration also took executive actions to undermine or delay implementation of the ACA, including directing federal agencies with authorities and responsibilities under the ACA to waive, defer, grant exemptions from or delay the implementation of any provision of the ACA that would impose a fiscal or regulatory burden on states, individuals, healthcare providers, health insurers or manufacturers of pharmaceuticals or medical devices. On January 28, 2021, however, President Biden revoked those orders and issued a new Executive Order which directs federal agencies to reconsider rules and other policies that limit Americans&#8217; access to health care and consider actions that will protect and strengthen that access. Under this order, federal agencies are directed to re-examine: </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">78</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">policies that undermine protections for people with pre-existing conditions, including complications related to COVID-19; demonstrations and waivers under Medicaid and the ACA that may reduce coverage or undermine the programs, including work requirements; policies that undermine the Health Insurance Marketplace or other markets for health insurance; policies that make it more difficult to enroll in Medicaid and the ACA; and policies that reduce affordability of coverage or financial assistance, including for dependents.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We expect that these healthcare reforms, as well as other healthcare reform measures that may be adopted in the future, may result in additional reductions in Medicare and other healthcare funding, more rigorous coverage criteria, new payment methodologies and additional downward pressure on the price that we receive for any approved product and/or the level of reimbursement physicians receive for administering any approved product we might bring to market. Reductions in reimbursement levels may negatively impact the prices we receive or the frequency with which our products are prescribed or administered. Any reduction in reimbursement from Medicare or other government programs may result in a similar reduction in payments from private payors. Accordingly, such reforms, if enacted, could have an adverse effect on anticipated revenue from product candidates that we may successfully develop and for which we may obtain marketing approval and may affect our overall financial condition and ability to develop or commercialize product candidates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">The prices of prescription pharmaceuticals in the United States and foreign jurisdictions are subject to considerable legislative and executive actions and could impact the prices we obtain for our products, if and when licensed.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The prices of prescription pharmaceuticals have also been the subject of considerable discussion in the United States. There have been several recent U.S. congressional inquiries, as well as proposed and enacted state and federal legislation designed to, among other things, bring more transparency to pharmaceutical pricing, review the relationship between pricing and manufacturer patient programs, and reduce the costs of pharmaceuticals under Medicare and Medicaid. In 2020, President Trump issued several executive orders intended to lower the costs of prescription products and certain provisions in these orders have been incorporated into regulations. These regulations include an interim final rule implementing a most favored nation model for prices that would tie Medicare Part B payments for certain physician-administered pharmaceuticals to the lowest price paid in other economically advanced countries, effective January 1, 2021. That rule, however, has been subject to a nationwide preliminary injunction and, on December 29, 2021, the Center for Medicare &amp; Medicaid Services, or CMS, issued a final rule to rescind it. With issuance of this rule, CMS stated that it will explore all options to incorporate value into payments for Medicare Part B pharmaceuticals and improve beneficiaries' access to evidence-based care.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In addition, in October 2020, HHS and the FDA published a final rule allowing states and other entities to develop a Section 804 Importation Program, or SIP, to import certain prescription drugs from Canada into the United States. The final rule is currently the subject of ongoing litigation, but at least six states (Vermont, Colorado, Florida, Maine, New Mexico, and New Hampshire) have passed laws allowing for the importation of drugs from Canada with the intent of developing SIPs for review and approval by the FDA. Further, on November 20, 2020, HHS finalized a regulation removing safe harbor protection for price reductions from pharmaceutical manufacturers to plan sponsors under Part D, either directly or through pharmacy benefit managers, unless the price reduction is required by law. The implementation of the rule has been delayed by the Biden administration from January 1, 2022 to January 1, 2023 in response to ongoing litigation. The rule also creates a new safe harbor for price reductions reflected at the point-of-sale, as well as a new safe harbor for certain fixed fee arrangements between pharmacy benefit managers and manufacturers, the implementation of which have also been delayed by the Biden administration until January 1, 2023 in response to ongoing litigation.  The rule also creates a new safe harbor for price reductions reflected at the point-of-sale, as well as a new safe harbor for certain fixed fee arrangements between pharmacy benefit managers and manufacturers, the implementation of which has been delayed under January 1, 2026, by the Infrastructure Investment and Jobs Act.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">On July 9, 2021, President Biden signed Executive Order 14063, which focuses on, among other things, the price of pharmaceuticals. The order directs the Department of Health and Human Services, or HHS, to create a plan within 45 days to combat &#8220;excessive pricing of prescription pharmaceuticals and enhance domestic pharmaceutical supply chains, to reduce the prices paid by the federal government for such pharmaceuticals, and to address the recurrent </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">79</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">problem of price gouging.&#8221; On September 9, 2021, HHS released its plan to reduce pharmaceutical prices. The key features of that plan are to: (a) make pharmaceutical prices more affordable and equitable for all consumers and throughout the health care system by supporting pharmaceutical price negotiations with manufacturers; (b) improve and promote competition throughout the prescription pharmaceutical industry by supporting market changes that strengthen supply chains, promote biosimilars and generic drugs, and increase transparency; and (c) foster scientific innovation to promote better healthcare and improve health by supporting public and private research and making sure that market incentives promote discovery of valuable and accessible new treatments.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">At the state level, individual states are increasingly aggressive in passing legislation and implementing regulations designed to control pharmaceutical and biological product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and marketing cost disclosure and transparency measures, and, in some cases, designed to encourage importation from other countries and bulk purchasing. In addition, regional healthcare organizations and individual hospitals are increasingly using bidding procedures to determine what pharmaceutical products and which suppliers will be included in their prescription drug and other healthcare programs. These measures could reduce the ultimate demand for our products, once approved, or put pressure on our product pricing. We expect that additional state and federal healthcare reform measures will be adopted in the future, any of which could limit the amounts that federal and state governments will pay for healthcare products and services, which could result in reduced demand for our product candidates or additional pricing pressures.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In the European Union, similar political, economic and regulatory developments may affect our ability to profitably commercialize our product candidates, if approved. In markets outside of the United States and the European Union, reimbursement and healthcare payment systems vary significantly by country and many countries have instituted price ceilings on specific products and therapies. In many countries, including those of the European Union, the pricing of prescription pharmaceuticals is subject to governmental control and access. In these countries, pricing negotiations with governmental authorities can take considerable time after the receipt of marketing approval for a product. To obtain reimbursement or pricing approval in some countries, we or our collaborators may be required to conduct a clinical trial that compares the cost-effectiveness of our product to other available therapies. If reimbursement of our products is unavailable or limited in scope or amount or if pricing is set at unsatisfactory levels, our business could be materially harmed.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We are subject to stringent privacy laws, information security laws, regulations, policies and contractual obligations related to data privacy and security, and a failure to comply with such requirements could subject us to significant fines and penalties, which may have a material adverse effect on our business, financial condition or results of operations.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We are subject to data privacy and protection laws and regulations that apply to the collection, transmission, storage and use of personally-identifying information, which among other things, impose certain requirements relating to the privacy, security and transmission of personal information, including comprehensive regulatory systems in the United States, European Union and United Kingdom. The legislative and regulatory landscape for privacy and data protection continues to evolve in jurisdictions worldwide, and there has been an increasing focus on privacy and data protection issues with the potential to affect our business. Failure to comply with any of these laws and regulations could result in enforcement action against us, including fines, imprisonment of company officials and public censure, claims for damages by affected individuals, damage to our reputation and loss of goodwill, any of which could have a material adverse effect on our business, financial condition, results of operations or prospects.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">There are numerous U.S. federal and state laws and regulations related to the privacy and security of personal information. In particular, regulations promulgated pursuant to HIPAA establish privacy and security standards that limit the use and disclosure of individually identifiable health information, or protected health information, and require the implementation of administrative, physical and technological safeguards to protect the privacy of protected health information and ensure the confidentiality, integrity and availability of electronic protected health information. Determining whether protected health information has been handled in compliance with applicable privacy standards and our contractual obligations can be complex and may be subject to changing interpretation. These obligations may be applicable to some or all of our business activities now or in the future.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">80</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">If we are unable to properly protect the privacy and security of protected health information, we could be found to have breached our contracts. Further, if we fail to comply with applicable privacy laws, including applicable HIPAA privacy and security standards, we could face civil and criminal penalties. HHS enforcement activity can result in financial liability and reputational harm, and responses to such enforcement activity can consume significant internal resources. In addition, state attorneys general are authorized to bring civil actions seeking either injunctions or damages in response to violations that threaten the privacy of state residents. We cannot be sure how these regulations will be interpreted, enforced or applied to our operations. In addition to the risks associated with enforcement activities and potential contractual liabilities, our ongoing efforts to comply with evolving laws and regulations at the federal and state level may be costly and require ongoing modifications to our policies, procedures and systems.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Similar to the laws in the United States, there are significant privacy and data security laws that apply in Europe and other countries. The collection, use, disclosure, transfer, or other processing of personal data, including personal health data, regarding individuals who are located in the European Economic Area, or the EEA, and the processing of personal data that takes place in the EEA, is regulated by the General Data Protection Regulation, or GDPR, which went into effect in May 2018 and which imposes obligations on companies that operate in our industry with respect to the processing of personal data and the cross-border transfer of such data. The GDPR imposes onerous accountability obligations requiring data controllers and processors to maintain a record of their data processing and policies. If our or our partners&#8217; or service providers&#8217; privacy or data security measures fail to comply with the GDPR requirements, we may be subject to litigation, regulatory investigations, enforcement notices requiring us to change the way we use personal data and/or fines of up to 20 million Euros or up to 4% of the total worldwide annual turnover of the preceding financial year, whichever is higher, as well as compensation claims by affected individuals, negative publicity, reputational harm and a potential loss of business and goodwill.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The GDPR places restrictions on the cross-border transfer of personal data from the European Union to countries that have not been found by the European Commission to offer adequate data protection legislation, such as the United States. There are ongoing concerns about the ability of companies to transfer personal data from the European Union to other countries. In July 2020, the Court of Justice of the European Union, or the CJEU, invalidated the EU-U.S. Privacy Shield, one of the mechanisms used to legitimize the transfer of personal data from the EEA to the United States. The CJEU decision also drew into question the long-term viability of an alternative means of data transfer, the standard contractual clauses, for transfers of personal data from the EEA to the United States. While we were not self-certified under the Privacy Shield, this CJEU decision may lead to increased scrutiny on data transfers from the EEA to the United States generally and increase our costs of compliance with data privacy legislation as well as our costs of negotiating appropriate privacy and security agreements with our vendors and business partners.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Laws and regulations governing any international operations we may have in the future may preclude us from developing, manufacturing and selling certain products outside of the United States and require us to develop and implement costly compliance programs.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">If we further expand our operations outside the United States, we will need to dedicate additional resources to comply with U.S. laws regarding international operations and the laws and regulations in each jurisdiction in which we operate and plan to operate. The FCPA prohibits any U.S. individual or business from paying, offering or authorizing payment or offering of anything of value, directly or indirectly, to any foreign official, political party or candidate for the purpose of influencing any act or decision of the foreign entity in order to assist the individual or business in obtaining or retaining business. The FCPA also obligates companies whose securities are listed in the United States to comply with certain accounting provisions requiring the company to maintain books and records that accurately and fairly reflect all transactions of the company, including international subsidiaries and to devise and maintain an adequate system of internal accounting controls for international operations.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Compliance with the FCPA is expensive and difficult, particularly in countries in which corruption is a recognized problem. In addition, the FCPA presents particular challenges in the pharmaceutical industry because in many countries, hospitals are operated by the government and doctors and other hospital employees are considered foreign </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">81</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">officials. Certain payments to hospitals in connection with clinical trials and other work have been deemed to be improper payments to government officials and have led to FCPA enforcement actions.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Various laws, regulations and executive orders also restrict the use and dissemination outside of the United States or the sharing with certain non-U.S. nationals, of information classified for national security purposes, as well as certain products and technical data relating to those products. Further, the provision of benefits or advantages to physicians to induce or encourage the prescription, recommendation, endorsement, purchase, supply, order or use of medicinal products is prohibited in the European Union. The provision of benefits or advantages to physicians is also governed by the national anti-bribery laws of E.U. Member States, such as the U.K. Bribery Act 2010. Infringement of these laws could result in substantial fines and imprisonment. Payments made to physicians in certain E.U. Member States must be publicly disclosed. Moreover, agreements with physicians often must be the subject of prior notification and approval by the physician&#8217;s employer, his or her competent professional organization and/or the regulatory authorities of the individual E.U. Member States. These requirements are provided in the national laws, industry codes or professional codes of conduct applicable in the E.U. Member States. Failure to comply with these requirements could result in reputational risk, public reprimands, administrative penalties, fines or imprisonment.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">If we expand our presence outside of the United States , it will require us to dedicate additional resources to comply with these laws and these laws may preclude us from developing, manufacturing or selling certain products and product candidates outside of the United States, which could limit our growth potential and increase our development costs. The failure to comply with laws governing international business practices may result in substantial civil and criminal penalties and suspension or debarment from government contracting. The SEC also may suspend or bar issuers from trading securities on U.S. exchanges for violations of the FCPA&#8217;s accounting provisions.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We and our third-party contract manufacturers must comply with environmental, health and safety laws and regulations, and failure to comply with these laws and regulations could expose us to significant costs or liabilities.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We and our third-party manufacturers are subject to numerous environmental, health and safety laws and regulations, including those governing laboratory procedures and the use, generation, manufacture, distribution, storage, handling, treatment, remediation and disposal of hazardous materials and wastes. Hazardous chemicals, including flammable and biological materials, are involved in certain aspects of our business, and we cannot eliminate the risk of injury or contamination from the use, generation, manufacture, distribution, storage, handling, treatment or disposal of hazardous materials and wastes. In the event of contamination or injury, or failure to comply with environmental, health and safety laws and regulations, we could be held liable for any resulting damages and any such liability could exceed our assets and resources. We could also incur significant costs associated with civil or criminal fines and penalties for failure to comply with such laws and regulations.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Although we maintain workers&#8217; compensation insurance to cover us for costs and expenses we may incur due to injuries to our employees resulting from the use of hazardous materials, this insurance may not provide adequate coverage against potential liabilities. We do not maintain insurance for environmental liability or toxic tort claims that may be asserted against us in connection with our storage or disposal of biological, hazardous or radioactive materials.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Environmental, health and safety laws and regulations are becoming increasingly more stringent. We may incur substantial costs in order to comply with current or future environmental, health and safety laws and regulations. These current or future laws and regulations may impair our research, development or production efforts. Our failure to comply with these laws and regulations also may result in substantial fines, penalties or other sanctions.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Further, with respect to the operations of our third-party contract manufacturers, it is possible that if they fail to operate in compliance with applicable environmental, health and safety laws and regulations or properly dispose of wastes associated with our products, we could be held liable for any resulting damages, suffer reputational harm or experience a disruption in the manufacture and supply of our product candidates or products.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">82</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Our employees may engage in misconduct or other improper activities, including noncompliance with regulatory standards and requirements and insider trading.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We are exposed to the risk of employee fraud or other misconduct. Misconduct by employees could include intentional failures to comply with FDA regulations, to provide accurate information to the FDA, to comply with manufacturing standards we have established, to comply with federal and state healthcare fraud and abuse laws and regulations, to report financial information or data accurately or to disclose unauthorized activities to us. In particular, sales, marketing and business arrangements in the healthcare industry are subject to extensive laws and regulations intended to prevent fraud, kickbacks, self-dealing and other abusive practices. These laws and regulations may restrict or prohibit a wide range of pricing, discounting, marketing and promotion, sales commission, customer incentive programs and other business arrangements. Employee misconduct could also involve the improper use of information obtained in the course of clinical trials, which could result in regulatory sanctions and serious harm to our reputation. It is not always possible to identify and deter employee misconduct, and the precautions we take to detect and prevent this activity may not be effective in controlling unknown or unmanaged risks or losses or in protecting us from governmental investigations or other actions or lawsuits stemming from a failure to be in compliance with such laws or regulations. Additionally, we are subject to the risk that a person could allege such fraud or other misconduct, even if none occurred. If any such actions are instituted against us, and we are not successful in defending ourselves or asserting our rights, those actions could have a significant impact on our business, including the imposition of civil, criminal and administrative penalties, damages, monetary fines, disgorgement, possible exclusion from participation in Medicare, Medicaid and other federal health care programs, contractual damages, reputational harm, diminished profits and future earnings and curtailment or restructuring of our operations, any of which could adversely affect our ability to operate our business and our results of operations.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Risks Related to our Business and Industry</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">If we fail to attract and retain senior management and key scientific personnel, we may be unable to successfully develop our ADC product candidates, conduct our clinical trials and commercialize our ADC product candidates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our ability to compete in the highly competitive biotechnology and biopharmaceutical industries depends upon our ability to attract, motivate and retain highly qualified managerial, scientific and medical personnel. We are highly dependent on members of our senior management, including Anna Protopapas, our President and Chief Executive Officer. The loss of the services of any of our senior management could impede the achievement of our research, development and commercialization objectives. Also, each of these persons may terminate their employment with us at any time. We do not maintain &#8220;key person&#8221; insurance for any of our executives or other employees.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Recruiting and retaining qualified scientific, clinical, sales and marketing personnel will also be critical to our success. We conduct our operations at our facility in Cambridge, Massachusetts, in a region that is headquarters to many other biopharmaceutical companies and many academic and research institutions. Competition for skilled personnel is intense and the turnover rate can be high, which may limit our ability to hire and retain highly qualified personnel on acceptable terms or at all. We may not be able to attract and retain these personnel on acceptable terms given the competition among numerous pharmaceutical and biotechnology companies for similar personnel. In addition, we rely on consultants and advisors, including scientific and clinical advisors, to assist us in formulating our research and development and commercialization strategy. Our consultants and advisors may be employed or have commitments under consulting or advisory contracts with other entities that may limit their availability to us.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We may encounter difficulties in managing our growth and expanding our operations successfully.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As we seek to advance our product candidates through clinical trials and commercialization, we will need to expand our development, regulatory, manufacturing, marketing and sales capabilities or contract with third parties to provide these capabilities for us. As our operations expand, we expect that we will need to manage additional relationships with various strategic partners, suppliers and other third parties. Future growth will impose significant added responsibilities on members of management. Our future financial performance and our ability to commercialize our product candidates and to compete effectively will depend, in part, on our ability to manage any </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">83</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">future growth effectively. To that end, we must be able to manage our development efforts and clinical trials effectively and hire, train and integrate additional management, administrative and, if necessary, sales and marketing personnel. Due to our limited financial resources and the limited experience of our management team in managing a company with such anticipated growth, we may not be able to accomplish these tasks, and our failure to accomplish any of them could prevent us from successfully growing our company or disrupt our operations.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">If product liability lawsuits are brought against us, we may incur substantial liabilities and may be required to limit commercialization of our ADC product candidates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We face an inherent risk of product liability as a result of the clinical testing of our product candidates and will face an even greater risk if we commercialize any products. For example, we may be sued if any product we develop causes, or is perceived to cause, injury or is found to be otherwise unsuitable during clinical testing, manufacturing, marketing or sale. Any such product liability claims may include allegations of defects in manufacturing, defects in design, a failure to warn of dangers inherent in the product, negligence, strict liability and a breach of warranties. Claims could also be asserted under state consumer protection acts. If we cannot successfully defend ourselves against product liability claims, we may incur substantial liabilities or be required to limit commercialization of our product candidates. Even a successful defense would require significant financial and management resources. Regardless of the merits or eventual outcome, liability claims may result in:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">injury to our reputation;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">decreased demand for our product candidates or products that we may develop;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">withdrawal of clinical trial participants;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">costs to defend the related litigations;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">a diversion of management&#8217;s time and our resources;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">substantial monetary awards to clinical trial participants or patients;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">product recalls, withdrawals or labeling, marketing or promotional restrictions;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">loss of revenue;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the inability to commercialize our product candidates; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">a decline in our stock price.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Failure to obtain and retain sufficient product liability insurance at an acceptable cost to protect against potential product liability claims could prevent or inhibit the commercialization of products we develop. We currently carry product liability insurance covering our clinical trials in the amount of $10 million in the aggregate. Although we maintain such insurance, any claim that may be brought against us could result in a court judgment or settlement in an amount that is not covered, in whole or in part, by our insurance or that is in excess of the limits of our insurance coverage. Our insurance policies also have various exclusions, and we may be subject to a product liability claim for which we have no coverage. In such instance, we might have to pay any amounts awarded by a court or negotiated in a settlement that exceed our coverage limitations or that are not covered by our insurance, and we may not have, or be able to obtain, sufficient capital to pay such amounts. If we are unable to obtain or maintain sufficient insurance coverage at an acceptable cost or to otherwise protect against potential product liability claims, it could prevent or inhibit the development and commercial production and sale of our product candidates, which could adversely affect our business, financial condition, results of operations and prospects.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We may acquire assets or form strategic alliances in the future, and we may not realize the benefits of such acquisitions.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">84</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We may acquire additional technologies and assets, form strategic alliances or create joint ventures with third parties that we believe will complement or augment our existing business. If we acquire assets with promising markets or technologies, we may not be able to realize the benefit of acquiring such assets if we are unable to successfully integrate them with our existing technologies. We may encounter numerous difficulties in developing, manufacturing and marketing any new products resulting from a strategic alliance or acquisition that delay or prevent us from realizing their expected benefits or enhancing our business. We cannot be assured that, following any such acquisition, we will achieve the expected synergies to justify the transaction.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our internal computer systems, or those of our strategic partners, third-party collaborators or other contractors or consultants, may fail or suffer security breaches, which could adversely affect our business, including through material disruptions of our programs or business operations.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our internal information technology systems and those of our current or future strategic partners, third party collaborators and other contractors and consultants are vulnerable to service interruptions or security breaches, including from cyber-attacks, computer viruses, ransomware, malware, unauthorized access, natural disasters, terrorism, war and telecommunication and electrical failures. If a failure, accident or security breach were to occur and cause interruptions in our operations or the operations of those third parties with which we contract, it could result in a material disruption of our programs and our business operations. We could lose access to our trade secrets or other proprietary information or experience other disruptions, which could require a substantial expenditure of resources to remedy. For example, the loss of clinical trial data for our product candidates could result in delays in our regulatory approval efforts and significantly increase our costs to recover or reproduce the data.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We could also be subject to risks caused by misappropriation, misuse, leakage, falsification or intentional or accidental release or loss of information maintained in our information systems and networks, including personal information of our employees or others. Outside parties may attempt to penetrate our systems or those of the third parties with which we contract or to coerce or fraudulently induce our employees or employees of such third parties to disclose sensitive information to gain access to our data. The number and complexity of these threats continue to increase over time. Although we develop and maintain systems and controls designed to prevent these events from occurring, and we have a process to identify and mitigate threats, such risks cannot be eliminated. Furthermore, there can be no assurance that we, or those third parties with which we contract, will promptly detect any such disruption or security breach, if at all. Additionally, the development and maintenance of these systems, controls and processes is costly and requires ongoing monitoring and updating as technologies change and efforts to overcome security measures become more sophisticated. To the extent that any disruption or security breach results in a loss of or damage to our data or applications or other data or applications relating to our technology or product candidates, or inappropriate disclosure of confidential or proprietary information, we could incur liabilities, our competitive position and the market perception of the effectiveness of our security measures could be harmed, our credibility could be damaged and the further development of our product candidates could be delayed.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Risks Related to our Common Stock</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">If our stock price is volatile, our stockholders could incur substantial losses.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our stock price has been and may continue to be volatile. During the period from November 4, 2019 to November 4, 2022, the closing price of our common stock ranged from a high of $27.59 per share to a low of $1.78 per share. The market price of shares of our common stock could be subject to wide fluctuations in response to many risk factors listed in this &#8220;Risk Factors&#8221; section, and others beyond our control, including:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">results and timing of preclinical studies and clinical trials of our current or future product candidates, including UpRi, XMT-1660 and XMT-2056;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">results of clinical trials of our competitors&#8217; products;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">failure to adequately protect our trade secrets;</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">85</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the terms on which we raise additional capital or our ability to raise it;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">commencement or termination of any strategic partnership or licensing arrangement;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">regulatory developments, including actions with respect to our products or our competitors&#8217; products;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">actual or anticipated fluctuations in our financial condition and operating results;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">publication of research reports by securities analysts about us or our competitors or our industry;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">our failure or the failure of our competitors to meet analysts&#8217; projections or guidance that we or our competitors may give to the market;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">additions and departures of key personnel;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">strategic decisions by us or our competitors, such as acquisitions, divestitures, spin-offs, joint ventures, strategic investments or changes in business strategy;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">the passage of legislation or other regulatory developments affecting us or our industry;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">changes in the structure of healthcare payment systems;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">fluctuations in the valuation of companies perceived by investors to be comparable to us;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">sales of our common stock by us (including pursuant to outstanding warrants or through our ATM offering programs), our insiders or our other stockholders;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">speculation in the press or investment community;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">announcement or expectation of additional financing efforts;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">changes in market conditions for biopharmaceutical stocks; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">changes in general market and economic conditions.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In addition, the stock market has historically experienced significant volatility, particularly with respect to pharmaceutical, biotechnology and other life sciences company stocks. The volatility of pharmaceutical, biotechnology and other life sciences company stocks often does not relate to the operating performance of the companies represented by the stock. As a result of this volatility, stockholders may not be able to sell their common stock at or above the price for which they paid for their shares. As we operate in a single industry, we are especially vulnerable to these factors to the extent that they affect our industry or our products, or to a lesser extent our markets. Furthermore, as a result of this volatility, we may not be able to maintain compliance with listing requirements of the Nasdaq Stock Market. In the past, securities class action litigation has often been initiated against companies following periods of volatility in their stock price. This type of litigation could result in substantial costs and divert our management&#8217;s attention and resources, and could also require us to make substantial payments to satisfy judgments or to settle litigation.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We do not expect to pay any cash dividends for the foreseeable future.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We do not anticipate that we will pay any cash dividends to holders of our common stock in the foreseeable future. Instead, we plan to retain any earnings to maintain and expand our operations. In addition, our New Credit Facility contains terms and any future debt financing arrangement may contain additional terms prohibiting or limiting the amount of dividends that may be declared or paid on our common stock. Accordingly, investors must rely on sales </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">86</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">of their common stock after price appreciation, which may never occur, as the only way to realize any return on their investment.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Provisions in our amended and restated certificate of incorporation, as amended, our amended and restated by-laws and Delaware law may have anti-takeover effects that could discourage an acquisition of us by others, even if an acquisition would be beneficial to our stockholders, and may prevent attempts by our stockholders to replace or remove our current management.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our amended and restated certificate of incorporation, as amended, amended and restated by-laws and Delaware law contain provisions that may have the effect of discouraging, delaying or preventing a change in control of us or changes in our management that stockholders may consider favorable, including transactions in which our stockholders might otherwise receive a premium for their shares. Our amended and restated certificate of incorporation, as amended, and by-laws include provisions that:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">authorize &#8220;blank check&#8221; preferred stock, which could be issued by our board of directors without stockholder approval and may contain voting, liquidation, dividend and other rights superior to our common stock;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">create a classified board of directors whose members serve staggered three-year terms;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">specify that special meetings of our stockholders can be called only by our board of directors;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">prohibit stockholder action by written consent;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">establish an advance notice procedure for stockholder approvals to be brought before an annual meeting of our stockholders, including proposed nominations of persons for election to our board of directors;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">provide that vacancies on our board of directors may be filled only by a majority of directors then in office, even though less than a quorum;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">provide that our directors may be removed only for cause;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">specify that no stockholder is permitted to cumulate votes at any election of directors;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">expressly authorize our board of directors to have discretion to modify, alter or repeal our amended and restated by-laws; and</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">require supermajority votes of the holders of our common stock to amend specified provisions of our amended and restated certificate of incorporation, as amended, and amended and restated by-laws.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In addition, because we are incorporated in the State of Delaware, we are governed by the provisions of Section 203 of the General Corporation Law of the State of Delaware, or the DGCL, which prohibits a person who owns in excess of 15% of our outstanding voting stock from merging or combining with us for a period of three years after the date of the transaction in which the person acquired in excess of 15% of our outstanding voting stock, unless the merger or combination is approved in a prescribed manner.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Any provision of our amended and restated certificate of incorporation, as amended, amended and restated by-laws or Delaware law that has the effect of delaying or deterring a change in control could limit the opportunity for our stockholders to receive a premium for their shares of our common stock, and could also affect the price that some investors are willing to pay for our common stock.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Our ability to use net operating losses and certain tax credit carryforwards may be subject to certain limitations.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">87</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">For the years ended December 31, 2021, 2020 and 2019, we recorded no income tax benefit for the net operating losses incurred in each year, due to the uncertainty of realizing a benefit from those items. We have incurred net operating losses (NOLs) since our inception. As of December 31, 2021 , we have federal NOLs of approximately $403.6&#160;million and state NOLs of approximately $337.1&#160;million. Of the $403.6&#160;million of federal NOLs, $34.1&#160;million expire at various dates through 2037. The remaining $369.4&#160;million of federal NOLs do not expire. The state NOLs will expire at various dates through 2041. As of December 31, 2021, we had Federal and State research and development tax credit carryforwards of approximately $10.1&#160;million and $3.1&#160;million, respectively, which expire at various dates through 2041. Under the 2017 Tax Act, federal NOLs incurred in 2018 and in future years may be carried forward indefinitely, but the deductibility of such federal NOLs is limited. It is uncertain if and to what extent various states will conform to the 2017 Tax Act. In addition, under Section 382 of the Internal Revenue Code, and corresponding provisions of state law, if a corporation undergoes an &#8220;ownership change,&#8221; which is generally defined as a greater than 50% change, by value, in its equity ownership over a three-year period, the corporation&#8217;s ability to use its pre-change NOLs and other pre-change tax attributes to offset its post-change income or taxes may be limited. Our past issuances of stock and other changes in our stock ownership may have resulted in ownership changes within the meaning of Section 382 of the Code; accordingly, our pre-change NOLs may be subject to limitation under Section 382. If we determine that we have not undergone an ownership change, the Internal Revenue Service could challenge our analysis, and our ability to use our NOLs to offset taxable income could be limited by Section 382 of the Code. Future changes in our stock ownership, some of which are outside of our control, could result in ownership changes under Section 382 of the Code further limiting our ability to utilize our NOLs. Our NOLs may also be impaired under state law. Accordingly, we may not be able to utilize a material portion of our NOLs. We have determined that ownership changes have occurred since our inception and that certain NOLs and research and development tax credit carryforwards will be subject to limitation. We may also have incurred subsequent ownership changes. Furthermore, our ability to utilize our NOLs is conditioned upon our attaining profitability and generating U.S. federal taxable income. We have incurred net losses since our inception and anticipate that we will continue to incur significant losses for the foreseeable future; thus, we do not know whether or when we will generate the U.S. federal taxable income necessary to utilize our NOLs. We have recorded a full valuation allowance related to our NOLs and other deferred tax assets due to the uncertainty of the ultimate realization of the future benefits of those assets.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Our amended and restated certificate of incorporation, as amended, designates the state or federal courts within the State of Delaware as the exclusive forum for certain types of actions and proceedings that may be initiated by our stockholders, which could limit our stockholders&#8217; ability to obtain a favorable judicial forum for disputes with us or our directors, officers or employees.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our amended and restated certificate of incorporation, as amended, provides that, subject to limited exceptions, the Court of Chancery of the State of Delaware will be the exclusive forum for (1) any derivative action or proceeding brought on our behalf, (2) any action asserting a claim of breach of a fiduciary duty owed by any of our directors, officers or other employees to us or our stockholders, (3) any action asserting a claim against us arising pursuant to any provision of the DGCL, our amended and restated certificate of incorporation, as amended, or our amended and restated by-laws, (4) any action to interpret, apply, enforce or determine the validity of our amended and restated certificate of incorporation, as amended, or amended and restated by-laws or (5) any other action asserting a claim against us that is governed by the internal affairs doctrine, in each case subject to the Court of Chancery having personal jurisdiction over the indispensable parties named as defendants therein. Any person or entity that purchases or otherwise acquires any interest in shares of our capital stock shall be deemed to have notice of and to have consented to the provisions of our amended and restated certificate of incorporation, as amended, described above. This choice of forum provision may limit a stockholder&#8217;s ability to bring a claim in a judicial forum that it finds favorable for disputes with us or our directors, officers or other employees, which may discourage such lawsuits against us and our directors, officers and employees. Alternatively, if a court were to find these provisions of our amended and restated certificate of incorporation inapplicable to, or unenforceable in respect of, one or more of the specified types of actions or proceedings, we may incur additional costs associated with resolving such matters in other jurisdictions, which could adversely affect our business and financial condition.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">This exclusive forum provision would not apply to suits brought to enforce a duty or liability created by the Securities Exchange Act of 1934, as amended, which provides for exclusive jurisdiction of the federal courts. It </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">88</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">could apply, however, to a suit that falls within one or more of the categories enumerated in the exclusive forum provision and asserts claims under the Securities Act of 1933, as amended, or the Securities Act, inasmuch as Section 22 of the Securities Act creates concurrent jurisdiction for federal and state courts over all suits brought to enforce any duty or liability created by the Securities Act or the rules and regulations thereunder, provided, that with respect to claims under the Securities Act, our stockholders will not be deemed to have waived our compliance with the federal securities laws and the rules and regulations thereunder.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">If securities analysts do not publish research or reports about our business or if they publish negative evaluations of our stock, the price of our stock and trading volume could decline.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The trading market for our common stock depends, in part, on the research and reports that industry or financial analysts publish about us or our business. If one or more of the analysts covering our business downgrade their evaluations of our stock, the price of our stock could decline. If one or more of these analysts cease to cover our stock or fail to regularly publish reports on us, we could lose visibility in the market for our stock, which in turn could cause our stock price to decline.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">A portion of our total outstanding shares may be sold into the market in the near future, which could cause the market price of our common stock to decline significantly, even if our business is doing well.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Sales of a significant number of shares of our common stock in the public market could occur at any time. These sales, or the perception in the market that the holders of a large number of shares of common stock intend to sell shares, could reduce the market price of our common stock.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We have registered substantially all shares of common stock that we may issue under our equity compensation plans. These shares can be freely sold in the public market upon issuance and once vested, subject to volume limitations applicable to affiliates. If any of these additional shares are sold, or if it is perceived that they will be sold, in the public market, the market price of our common stock could decline.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">General Risk Factors</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Our business is subject to risks arising from the outbreaks of disease, such as epidemics or pandemics, including the ongoing COVID-19 pandemic.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The widespread infection of COVID-19 in the United States and abroad has caused significant volatility and uncertainty in U.S. and international markets, which could result in a prolonged economic downturn that may disrupt our business, including by adversely affecting our ability to conduct financings on terms acceptable to us, if at all.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In addition, we may experience disruptions that could severely impact our business, preclinical studies and clinical trials, including:</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">Our clinical trials may be adversely affected, delayed or interrupted, including, for example, site initiation, patient recruitment and enrollment, availability of clinical trial materials, and data analysis. Some patients and clinical investigators may not be able to comply with clinical trial protocols and patients may choose to withdraw from our trials or we may have to pause enrollment or we may choose to or be required to pause enrollment and or patient dosing in our ongoing clinical trials in order to preserve health resources and protect clinical trial participants, which could delay our clinical trials or impact the strength or validity of our clinical trial data. It is unknown how long these pauses or disruptions could continue.</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">We currently rely on third parties to, among other things, manufacture raw materials, manufacture our product candidates for our clinical trials, shipping of investigational drugs and clinical trial samples, perform quality testing and supply other goods and services to run our business. If any such third party in our supply chain for materials are adversely impacted by restrictions resulting from the coronavirus pandemic, including staffing shortages, raw material supplies, production slowdowns or disruptions in </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">89</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt;padding-left:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">delivery systems, our supply chain may be disrupted, limiting our ability to manufacture our product candidates for our clinical trials and conduct our research and development operations.</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">Our increased reliance on personnel working from home may negatively impact productivity, or disrupt, delay, or otherwise adversely impact our business. In addition, this could increase our cyber security risk, create data accessibility concerns, and make us more susceptible to communication disruptions, any of which could adversely impact our business operations or delay necessary interactions with local and federal regulators, ethics committees, manufacturing sites, research or clinical trials sites and other important agencies and contractors.</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">Our employees and contractors conducting research and development activities may not be able to access our laboratory for an extended period of time as a result of the closure of our offices and the possibility that governmental authorities further modify current restrictions. As a result, this could delay timely completion of preclinical activities, including completing IND-enabling studies or our ability to select future development candidates, and initiation of additional clinical trials for other of our development programs.</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">Health regulatory agencies globally may experience disruptions in their operations as a result of the COVID-19 pandemic. The FDA and comparable foreign regulatory agencies may have slower response times or be under-resourced to continue to monitor our clinical trials and, as a result, review, inspection, and other timelines may be materially delayed. It is unknown how long these disruptions could continue, were they to occur. Any prolongation or de-prioritization of our clinical trials or delay in regulatory review resulting from such disruptions could materially affect the development of our product candidates. For example, regulatory authorities may require that we not distribute a product candidate lot until the relevant agency authorizes its release. Such release authorization may be delayed as a result of the COVID-19 pandemic and could result in delays to our clinical trials.</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">&#8226;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">The ongoing COVID-19 pandemic may cause the trading prices for shares of our common stock and other biopharmaceutical companies' shares to be highly volatile. As a result, we may face difficulties raising capital through sales of shares of our common stock, or such sales may be on unfavorable terms. In addition, a recession, depression or other sustained adverse market event resulting from the spread of the coronavirus could materially and adversely affect our business and the value of our common stock.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The COVID-19 pandemic continues to evolve. The ultimate impact of the coronavirus pandemic on our business operations is highly uncertain and subject to change and will depend on future developments, which cannot be accurately predicted, including the duration of the pandemic, the emergence and severity of new variants of the virus, additional or modified government actions, new information that will emerge concerning the severity and impact of COVID-19, the timing, availability, efficacy, adoption and distribution of vaccines or other preventative treatments and other actions taken to contain coronavirus or address its impact in the short and long term, among others. We do not yet know the full extent of potential delays or impacts on our business, our clinical trials, our research programs, healthcare systems or the global economy.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">We, or the third parties upon whom we depend, may be adversely affected by serious disasters.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Any unplanned event, such as a flood, fire, explosion, earthquake, extreme weather condition, medical epidemic, power shortage, telecommunication failure or other natural or human-made accident or incident that results in us being unable to fully use our facilities, or the facilities of third parties with which we contract, may have a material and adverse effect on our ability to operate our business and may have significant negative consequences on our financial and operating conditions. Loss of access to these facilities or operations may result in increased costs, delays in the development of our current or future product candidates or the interruption of our business operations for a substantial period of time.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">There can be no assurance that the amounts of insurance that we maintain will be sufficient to satisfy any damages and losses in the event a serious disaster or similar event occurs. If our facilities, or the manufacturing facilities of our third-party contract manufacturers, are unable to operate because of an accident or incident or for any other </span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">90</span></div></div></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">reason, even for a short period of time, any or all of our research and development programs and commercialization efforts may be harmed.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Unfavorable global economic or geopolitical conditions could adversely affect our business, financial condition or results of operations.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our results of operations could be adversely affected by general conditions in the global economy, geopolitical considerations and global financial market conditions, including changes in inflation, interest rates and overall economic conditions and uncertainties. For example, the global financial crisis caused extreme volatility and disruptions in the capital and credit markets. We cannot assure stockholders that deterioration of the global credit and financial markets would not negatively impact our stock price, our current portfolio of cash equivalents or investments, or our ability to meet our financing objectives. If the current equity and credit markets deteriorate, it may make any necessary debt or equity financing more difficult, more costly, and more dilutive. Failure to secure any necessary financing in a timely manner and on favorable terms could have a material adverse effect on our growth strategy, financial performance and stock price and could require us to delay or abandon clinical development plans. A weak or declining economy could also strain our suppliers and vendors involved in our clinical development activities. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Additionally, Russia&#8217;s invasion of Ukraine in February 2022 and the global response, including the imposition of sanctions by the United States and other countries, could create or exacerbate risks facing our business. We have evaluated our operations, vendor contracts and clinical trial arrangements, and at present we do not expect the conflict to directly have a materially adverse effect on our financial condition or results of operations. However, if the hostilities persist, escalate or expand, other risks we have identified in this report may be exacerbated. For example, if our supply arrangements or clinical sites are disrupted due to expanded sanctions or involvement of countries where we have operations or relationships, our business could be materially disrupted. Further, the use of state-sponsored cyberattacks could expand as part of the conflict, which could adversely affect our ability to maintain or enhance our cyber security and data protection measures. Any of the foregoing could harm our business, and we cannot anticipate all of the ways in which the current economic and geopolitical climate and financial market conditions could adversely impact our business.</span></div><div style="margin-bottom:12pt"><span><br/></span></div><div id="i036c42b7cd7942de8867eb61947b1b1c_94"></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Item&#160;2.&#160;Unregistered Sales of Equity Securities and Use of Proceeds</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">None.</span></div><div style="margin-bottom:12pt"><span><br/></span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">91</span></div></div></div><div id="i036c42b7cd7942de8867eb61947b1b1c_97"></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="-sec-extract:summary;margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="-sec-extract:exhibit;color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="-sec-extract:exhibit;color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="-sec-extract:summary;margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Item&#160;6.&#160;Exhibits.</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:18.130%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:1.883%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:77.587%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%;text-decoration:underline">Exhibit Number</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%;text-decoration:underline">Description</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3.1</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="-sec-extract:exhibit;color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="http://www.sec.gov/Archives/edgar/data/0001442836/000110465922070125/tm2218123d1_ex3-1.htm">Fifth Amended and Restated Certificate of Incorporation, as amended, as of June 9, 2022 (incorporated by reference to Exhibit 3.1 to the Company's Current Report on Form 8-K filed with the SEC on June 10, 2022).</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3.2</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="-sec-extract:exhibit;color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="http://www.sec.gov/Archives/edgar/data/1442836/000110465917044267/a17-17109_1ex3d2.htm">Amended and Restated Bylaws (incorporated by reference to Exhibit 3.2 to the Company&#8217;s Current Report on Form 8-K filed with the SEC on July 10, 2017).</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">10.1*</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="-sec-extract:exhibit;color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="exhibit101.htm">Collaboration, Option and License Agreement, dated August 6, 2022, between the Company and GlaxoSmithKline Intellectual Property (No. 4) Limited</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">31.1</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="-sec-extract:exhibit;color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="exhibit31110-qfy2022q3.htm">Certification of Principal Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">31.2</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="-sec-extract:exhibit;color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="exhibit31210-qfy2022q3.htm">Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">32.1#</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a style="-sec-extract:exhibit;color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline" href="exhibit32110-qfy2022q3.htm">Certification of Principal Executive Officer and Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.</a></span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">101.INS</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Inline XBRL Instance Document</span></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">101.SCH</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Inline XBRL Taxonomy Extension Schema Document</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">101.CAL</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Inline XBRL Taxonomy Extension Calculation Linkbase Document</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">101.DEF</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Inline XBRL Taxonomy Extension Definition Linkbase Document</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">101.LAB</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Inline XBRL Taxonomy Extension Label Linkbase Document</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">101.PRE</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Inline XBRL Taxonomy Extension Presentation Linkbase Document</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">104</span></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document (included in Exhibit 101).</span></div></td></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">*Pursuant to Item 601(b)(10(iv) of Regulation S-K, certain portions of this exhibit (marked by [**]) have been omitted because the identified information is not material and is the type of information that the registrant treats as private or confidential.  </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">#The certification attached as Exhibit 32.1 accompanying this Quarterly Report on Form 10-Q is not deemed filed with the Securities and Exchange Commission and is not to be incorporated by reference into any filing of the Company under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, whether made before or after the date of this Quarterly Report on Form 10-Q, irrespective of any general incorporation language contained in such filing.</span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="-sec-extract:summary;margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">92</span></div></div></div><div id="i036c42b7cd7942de8867eb61947b1b1c_103"></div><hr style="page-break-after:always"/><div style="min-height:72pt;width:100%"><div style="margin-bottom:12pt"><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Table of </a><a style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline" href="#i036c42b7cd7942de8867eb61947b1b1c_10">Contents</a></span></div></div><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;text-decoration:underline">SIGNATURES</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:46.496%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:3.387%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:46.817%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="6" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Mersana Therapeutics, Inc.</span></td></tr><tr style="height:14pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="6" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Dated: November 7, 2022</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">By:</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">/s/ Anna Protopapas</span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Anna Protopapas<br/>President and Chief Executive Officer<br/>(Principal Executive Officer and Authorized Signatory)</span></td></tr><tr style="height:14pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Dated: November 7, 2022</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">By:</span></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">/s/ Brian DeSchuytner</span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Brian DeSchuytner<br/>SVP, Chief Financial Officer<br/>(Principal Financial Officer)</span></td></tr></table></div><div style="margin-bottom:12pt;text-align:center"><span><br/></span></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:12pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">93</span></div></div></div></body></html>
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<DOCUMENT>
<TYPE>EX-10.1
<SEQUENCE>2
<FILENAME>exhibit101.htm
<DESCRIPTION>EX-10.1
<TEXT>
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<title>Document</title></head><body><div id="ice64557759424b7bba925a7a74526e92_1"></div><div style="min-height:72pt;width:100%"><div style="text-align:right"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Exhibit 10.1</font></div><div style="text-align:right"><font><br></font></div><div style="text-align:right"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">EXECUTION VERSION</font></div></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Certain identified information has been excluded from the exhibit because it is both (i) not material and (ii) is the type of information that the registrant treats as private or confidential. Double asterisks denote omissions. </font></div><div style="margin-bottom:12pt;text-align:center"><font><br></font></div><div style="margin-bottom:12pt;text-align:center"><font><br></font></div><div style="margin-bottom:12pt;text-align:center"><font><br></font></div><div style="margin-bottom:12pt;text-align:center"><font><br></font></div><div style="margin-bottom:12pt;text-align:center"><font><br></font></div><div style="margin-bottom:12pt;text-align:center"><font><br></font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">COLLABORATION, OPTION AND LICENSE AGREEMENT</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Between</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GLAXOSMITHKLINE INTELLECTUAL PROPERTY (NO. 4) LIMITED</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">And</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">MERSANA THERAPEUTICS, INC.</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">AUGUST 6, 2022</font></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><div id="ice64557759424b7bba925a7a74526e92_4"></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">TABLE OF CONTENTS</font></div><div style="margin-bottom:12pt;text-align:right"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Page</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:91.688%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:6.112%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">ARTICLE 1 DEFINITIONS</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">1</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">ARTICLE 2 INITIAL DEVELOPMENT PLAN&#59; PRE-OPTION EXERCISE TERM</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">33</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">ARTICLE 3 GSK OPTION</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">37</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">ARTICLE 4 LICENSES&#59; EXCLUSIVITY&#59; ROFN</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">48</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">ARTICLE 5 DEVELOPMENT</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">54</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">ARTICLE 6 REGULATORY MATTERS</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">70</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">ARTICLE 7 MANUFACTURING AND SUPPLY</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">73</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">ARTICLE 8 COMMERCIALIZATION</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">79</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">ARTICLE 9 PROFIT SHARE ELECTION&#59; CO-PROMOTION RIGHT</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">80</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">ARTICLE 10 MANAGEMENT OF THE COLLABORATION</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">90</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">ARTICLE 11 FINANCIAL PROVISIONS</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">102</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">ARTICLE 12 CONFIDENTIALITY&#59; PUBLICATIONS AND PRESENTATIONS</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">127</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">ARTICLE 13 INTELLECTUAL PROPERTY</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">134</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">ARTICLE 14 REPRESENTATIONS AND WARRANTIES AND COVENANTS</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">143</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">ARTICLE 15 INDEMNIFICATION</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">150</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">ARTICLE 16 TERM AND TERMINATION</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">153</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">ARTICLE 17 EFFECTS OF EXPIRATION OR TERMINATION</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">155</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">ARTICLE 18 DISPUTE RESOLUTION</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">163</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">ARTICLE 19 MISCELLANEOUS</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">165</font></div></td></tr></table></div><div style="margin-bottom:12pt;margin-top:18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">SCHEDULES</font></div><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Schedule 1.184&#160;&#160;&#160;&#160;&#8211;&#160;&#160;&#160;&#160;Licensed Compound</font></div><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Schedule 1.222&#160;&#160;&#160;&#160;&#8211;&#160;&#160;&#160;&#160;Existing Mersana Product-Related Patents</font></div><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Schedule 1.251&#160;&#160;&#160;&#160;&#8211;&#160;&#160;&#160;&#160;Option Data Package</font></div><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Schedule 2.1&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#8211;&#160;&#160;&#160;&#160;Initial Development Plan</font></div><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Schedule 3.3.1&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#8211;&#160;&#160;&#160;&#160;Option Diligence Data</font></div><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Schedule 5.2.10&#160;&#160;&#160;&#160;&#8211;&#160;&#160;&#160;&#160;Cybersecurity </font></div><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Schedule 5.2.12&#160;&#160;&#160;&#160;&#8211;&#160;&#160;&#160;&#160;Form of Material Transfer Record</font></div><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Schedule 11.5.1&#160;&#160;&#160;&#160;&#8211;&#160;&#160;&#160;&#160;Pre-Tax Profit or Loss Schedule</font></div><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Schedule 11.8.1&#160;&#160;&#160;&#160;&#8211;&#160;&#160;&#160;&#160;Existing Mersana Upstream Agreement Payments</font></div><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Schedule 11.9.2&#160;&#160;&#160;&#160;&#8211;&#160;&#160;&#160;&#160;Invoicing and Bank Detail Instructions</font></div><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Schedule 12.2&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#8211;&#160;&#160;&#160;&#160;Initial Press Release</font></div><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Schedule 14.2&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#8211;&#160;&#160;&#160;&#160;Mersana Disclosure Schedule</font></div><div><font><br></font></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font><br></font></div></div></div><div id="ice64557759424b7bba925a7a74526e92_7"></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div style="text-align:right"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">EXECUTION VERSION</font></div></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">COLLABORATION, OPTION AND LICENSE AGREEMENT</font></div><div style="margin-bottom:12pt;text-align:justify;text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">This Collaboration, Option and License Agreement (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Agreement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) is made and entered into as of  August 6, 2022 (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Effective Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) and is effective as of the Effective Date, between GlaxoSmithKline Intellectual Property (No. 4) Limited, a company registered in England and Wales (registered number 11721880) and having business offices at 980 Great West Road, Brentford, Middlesex TW8 9GS United Kingdom (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), and Mersana Therapeutics, Inc., a Delaware corporation having an office at 840 Memorial Drive, Cambridge, MA 02139 (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;). GSK and Mersana are sometimes referred to individually as a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; and collectively as the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Parties</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.&#8221;</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">BACKGROUND</font></div><div style="margin-bottom:12pt;text-align:justify;text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">WHEREAS</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, GSK, among other things, conducts programs to discover, develop, manufacture and commercialize innovative therapeutic products for the treatment and prevention of diseases&#59;</font></div><div style="margin-bottom:12pt;text-align:justify;text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">WHEREAS</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, Mersana, among other things, conducts programs to discover, develop, manufacture and commercialize innovative therapeutic products for the treatment and prevention of diseases&#59;</font></div><div style="margin-bottom:12pt;text-align:justify;text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">WHEREAS</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, Mersana has developed the Licensed Compound and owns or Controls the Mersana Technology related thereto&#59; and</font></div><div style="margin-bottom:12pt;text-align:justify;text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">WHEREAS</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, GSK desires to obtain, and Mersana desires to grant to GSK, an exclusive option to obtain an exclusive license under the Mersana Technology, in each case, in accordance with the terms and subject to conditions set forth in this Agreement.</font></div><div style="margin-bottom:12pt;text-align:justify;text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">NOW, THEREFORE</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, for good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the Parties agree as follows&#58;</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ARTICLE 1<br>DEFINITIONS</font></div><div style="margin-bottom:12pt;text-align:justify;text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Capitalized terms used in this Agreement, whether used in the singular or plural, shall have the meanings set forth below, unless otherwise specifically indicated herein.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.1&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">AAA Rules</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 18.4 (Arbitration).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.2&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Accounting Standards</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, with respect to GSK, IFRS, and, with respect to Mersana, GAAP, in each case, as consistently applied by the applicable Party and its Affiliates, as the same may be changed from time to time by the Parties.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.3&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Acquiree</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 4.5.3(b).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.4&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Acquiror</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 4.5.3(a).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.5&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ADC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means an Antibody drug conjugate in which an Antibody is covalently attached via a linker moiety to a distinct pharmacological agent or other biologically active ingredient.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.6&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Adverse Ruling</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 16.3 (Termination for Material Breach).</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">-1-</font></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.7&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Affiliate</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, with respect to a given Party, any Person that directly or indirectly controls, or is controlled by, or is under common control with such Party.  For the purposes of this Section 1.7 (Affiliate), &#8220;control&#8221; means ownership, directly or indirectly through one or more Affiliates, of more than fifty percent (50%) of the shares of stock entitled to vote for the election of directors, in the case of a corporation, or more than fifty percent (50%) of the equity interests in the case of any other type of legal entity, or status as a general partner in the case of any partnership, or any other arrangement whereby a Person controls or has the right to control the board of directors or equivalent governing body or management of a corporation or other entity.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.8&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Agreement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in the preamble.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.9&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Alliance Manager</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 10.9 (Alliance Managers).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.10&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Allowable Expenses</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in the Pre-Tax Profit or Loss Schedule.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.11&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Antibody</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.12&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Applicable Law</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, individually or collectively, any and all laws, statutes, ordinances, rules, directives and regulations of any governmental or regulatory authority within the applicable jurisdiction that may be in effect from time to time that apply to a Party&#8217;s applicable activities or obligations under or in connection with this Agreement, including, if applicable, GMP, GLP, GCP, the FD&#38;C Act, the Prescription Drug Marketing Act of 1987, the Generic Drug Enforcement Act of 1992 (21 U.S.C. &#167; 335a et seq.), the Anti-Kickback Statute (42 U.S.C. &#167; 1320a-7b et seq.), the False Claims Act (31 U.S.C. &#167; 3729 et seq.), Civil Monetary Penalties Law (42 U.S.C. &#167; 1320a-7a), the Patient Protection and Affordable Care Act (42 U.S.C. &#167; 18001 et seq.), the Social Security Act (42 U.S.C. Chapter 7), the Antifraud and Abuse Amendment to the Social Security Act, Federal Program Fraud Civil Remedies Act (31 U.S.C. &#167; 3801 et seq.), FCPA, Data Protection Laws, and all applicable implementing regulations for the foregoing, and all applicable state laws and the laws of the District of Columbia corresponding to any of the foregoing, all as amended from time to time.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.13&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Approved Labeling</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, with respect to a Licensed Product that has obtained Marketing Approval in the Shared Territory, (a) the FDA-approved full prescribing information for such Licensed Product&#59; and (b) the FDA-approved labels and other written, printed, or graphic materials on any container, wrapper, or package insert that is used with or for such Licensed Product in the Shared Territory.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.14&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Arising Know-How</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means all Know-How (whether or not patentable) that is first discovered, developed, generated, invented, derived or created during the Term by or on behalf of a Party or any of its Affiliates, either alone or jointly with the other Party or any of its Affiliates, in each case, in connection with performance of such Party&#8217;s activities under this Agreement.  &#91;**&#93;. </font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.15&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Arising</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Patent</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any Patent that (a) has a priority date occurring on or after the Effective Date&#59; and (b) claims any Arising Know-How.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.16&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Arising</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Technology</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means all Arising Know-How and Arising Patents.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.17&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Assigned Platform-Specific Arising Know-How</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section&#160;13.1.4 (Mersana Arising Technology).</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-2-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.18&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Assigned Platform-Specific Arising Patent</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 13.1.4 (Mersana Arising Technology).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.19&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Assigned Platform-Specific Arising Technolog</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">y&#8221; means all Assigned Platform-Specific Arising Know-How and Assigned Platform-Specific Arising Patents.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.20&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Assigned Product-Specific Arising Know-How</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section&#160;13.1.3 (GSK Arising Technology).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.21&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Assigned Product-Specific Arising Patent</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 13.1.3 (GSK Arising Technology).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.22&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Balancing Payment</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 11.5.5(b).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.23&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Bankruptcy</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Code</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means Title 11 of the United States Code.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.24&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Biosimilar</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Product</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; 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means a Biologics License Application (as more fully defined in 21 C.F.R. 601.2 et seq. or its successor regulation) and all amendments and supplements thereto filed with the FDA.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.26&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">BPCIA</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the Biologics Price Competition and Innovation Act of 2009 (42 U.S.C. &#167; 262 et seq) or any similar provisions in a country outside the United States.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.27&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Breaching</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; 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means &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.30&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">&#91;**&#93;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.31&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Business</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Day</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means a day that is not (a) a Saturday, Sunday or a day on which banking institutions in New York, New York or London, United Kingdom are required by Applicable Law to remain closed, or (b) the nine (9) consecutive calendar days beginning on December 24 through and including January 1 of each Calendar Year to the extent those days are not included in (a) in this Section 1.31.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.32&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">CAC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 8.3.1 (Establishment of CAC).</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-3-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.33&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Calendar Quarter</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means each respective period of three (3) consecutive calendar months ending on March 31, June 30, September 30 and December 31.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.34&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Calendar Year</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means each successive period of twelve (12) months commencing on January 1 and ending on December 31.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.35&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Cap Excess Amounts</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 5.2.4(a).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.36&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">CCPA</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 1.78 (Data Protection Law).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.37&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Change of Control</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, with respect to a Party, an event or transaction or series of events or transactions by which&#58; (a) any Third Party (or group of Third Parties acting in concert) becomes the beneficial owner, directly or indirectly, of more than fifty percent (50%) of the outstanding securities of such Party or the total voting power of such securities normally entitled to vote in elections of directors for such Party&#59; (b) (i) such Party reorganizes, consolidates or comes under common control with, or merges into, another Third Party entity, or (ii) any Third Party entity reorganizes, consolidates or comes under common control with, or merges into, such Party, in either event of the foregoing ((i) or (ii)) where more than fifty percent (50%) of the total voting power of the securities outstanding of the surviving entity normally entitled to vote in elections of directors for such surviving entity is not held by the parties holding at least fifty percent (50%) of the outstanding shares of such Party, or the total voting power of such securities normally entitled to vote in elections of directors for such Party, immediately preceding such reorganization, consolidation or merger&#59; or (c) such Party conveys, transfers or leases to a Third Party (x) all or substantially all of its assets or the control thereof or (y) all or substantially all of its assets or business relating to this Agreement or the control thereof.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.38&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Clearance</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means (a) solely if GSK determines that any HSR Filing is required, then, with respect to any HSR Filings submitted by the Parties pursuant to Section 3.8.2 (Antitrust Filings), the earlier of (i) the date on which the FTC or DOJ notifies the Parties of early termination of the applicable waiting period under the HSR Act or (ii) the date on which the applicable waiting period under the HSR Act or any voluntary extension mutually agreed to by the Parties expires&#59; provided that, if the FTC or DOJ commences any investigation by means of a second request or otherwise, the Clearance Date with respect to such HSR Filings shall be the date on which any investigation opened by the FTC or DOJ has been terminated, without action to prevent the Parties from implementing the transactions contemplated by this Agreement with respect to the United States&#59; (b) solely if GSK determines that any Other Antitrust Filing is required, then, with respect to any Other Antitrust Filing submitted by the Parties pursuant to Section 3.8.2 (Antitrust Filings), the date on which, pursuant to Applicable Laws or notification by the applicable Governmental Authority, there is no legal impediment based on Applicable Laws related to antitrust matters to consummation of the exercise of the Option&#59; and (c) if GSK determines that no HSR Filing or Other Antitrust Filing is required, the Option Exercise Date.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.39&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Clinical Manufacturing</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; or &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Clinical Manufacture</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the Manufacture of a Licensed Product (including Manufacturing the Licensed Compound contained in such Licensed Product) or the acquisition of such Licensed Compound and Licensed Product from a CMO, in each case, for use in Clinical Trials.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-4-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.40&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Clinical Manufacture Costs</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means Manufacturing Costs of the Clinical Manufacture of a given Licensed Product (including the cost of Manufacturing the Licensed Compound contained in such Licensed Product).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.41&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Clinical</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Supply</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Agreement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 7.2.2(c).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.42&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Clinical</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Trial</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any study in humans to obtain information regarding a pharmaceutical product, including information relating to the safety, tolerability, pharmacological activity, pharmacokinetics, dose ranging, or efficacy of such product.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.43&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">CMC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Development</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any and all of the following Development activities&#58; analytical test method development, process development (</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">e.g.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, starting material, intermediate(s), drug substance and drug product),  formulation development, delivery system development, control strategy (including process and product) development and establishment, quality assurance and quality control development,  process scale-up, process and product characterization and stability testing,  process validation, method validation, shipping validation, process transfer and other related activities, in each case pertaining to the Development of a process and analytical methods to Manufacture and test the Licensed Compound and Licensed Products robustly and reliably.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.44&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">CMOs</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 1.192.2 (Manufacturing Cost).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.45&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Co-Chair</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 10.7.1 (Membership).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.46&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Co-Promotion End Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 9.3.4(a).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.47&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Co-Promotion Exercise Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 9.2.1 (Exercise of Co-Promotion Right).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.48&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Co-Promotion Exercise Notice</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 9.2.1 (Exercise of Co-Promotion Right).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.49&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Co-Promotion Right</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 9.2.1 (Exercise of Co-Promotion Right).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.50&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Co-Promotion Term</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, if Mersana exercises its Co-Promotion Right pursuant to Section 9.2.1 (Exercise of Co-Promotion Right), the period beginning on the Co-Promotion Exercise Date and ending on the earliest to occur of (a) the Co-Promotion End Date&#59; (b) the date on which the Parties mutually agree that Mersana may cease Detailing activities in the Shared Territory&#59; or (c) the expiration or earlier termination of this Agreement, as applicable.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.51&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Collaboration</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, if GSK exercises the Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), (a) the conduct of the Shared Global Development Activities under the Joint Development Plan&#59; (b) if Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), the sharing of the Pre-Tax Profit or Loss in the Shared Territory in accordance with Section 11.5 (Pre-Tax Profit or Loss Sharing)&#59; and (c) if Mersana exercises its Co-Promotion Right pursuant to Section 9.2.1 (Exercise of Co-Promotion Right), the conduct of the co-Detailing of the Licensed Products in the Shared Territory in accordance with Section 9.2 (Co-Promotion Right).</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-5-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.52&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Collaboration</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Term</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, if GSK exercises the Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), the period beginning on the License Effective Date and ending upon the expiration or earlier termination of this Agreement in accordance with Article 16 (Term and Termination).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.53&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">&#91;**&#93;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.54&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Combination</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Product</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means a Licensed Product that includes the Licensed Compound in combination with one or more therapeutically active ingredients that is not the Licensed Compound (the &#8220;Other Component(s)&#8221;), whether in a single formulation finished form, co-packaged, or as separate products otherwise sold and invoiced under a single invoiced price, but excluding any Combination Therapy&#59; provided that devices, generic or biosimilar compounds, dosage form vehicles, adjuvants, and excipients shall not be deemed to be &#8220;active ingredients&#8221; for purposes of this definition.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.55&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Combination</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Study</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means a Clinical Trial to evaluate a Combination Therapy.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.56&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Combination</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Therapy</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the use or method of using a Licensed Product and at least one other active therapeutic compound or therapy, together in either concomitant or sequential administration&#59; provided that a Combination Therapy will not be considered a Combination Product hereunder &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.57&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Commercial FTE Costs</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in the Pre-Tax Profit or Loss Schedule.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.58&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Commercial Manufacturing</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; or &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Commercial Manufacture</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the Manufacture of a Licensed Product (including Manufacturing the Licensed Compound contained in such Licensed Product) or acquisition of such Licensed Compound and Licensed Product from a CMO, in each case, for Commercialization of such Licensed Product.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.59&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Commercialization</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any and all activities directed to the preparation for sale of, offering for sale of, or sale of a given product (including any Licensed Product), including activities related to marketing, promoting, selling, distributing, seeking, obtaining, and maintaining Reimbursement Approvals, and importing and exporting such product, launch preparation activities, medical affairs and interacting with Regulatory Authorities regarding any of the foregoing but, in each case, excluding any activities directed to Development and interactions with Regulatory Authorities regarding Development.  &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Commercialize</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; and &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Commercializing</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; shall have their correlative meanings.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.60&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Commercialization Excess Costs</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in the Section 11.5.5(d).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.61&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Commercialization Framework</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 8.3.2 (Commercialization Framework&#59; Responsibilities of the CAC).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.62&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Commercialization Permitted Overage</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in the Section&#160;11.5.5(c).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.63&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Commercially Reasonable Efforts</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.64&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Committee</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, individually, the JSC, the JDC, the JMC, the JCC and the Financial Working Group or any other Subcommittee established as set forth in Section 10.6 (Other Subcommittees).</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-6-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.65&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Committee</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Deadlock</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 10.8.1 (Committee Decision Making).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.66&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Competing</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Product</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 4.5.1 (Mutual Exclusivity Covenant).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.67&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Competing</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Program</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 4.5.3 (Change of Control Exception).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.68&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Completion</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">of Manufacturing Tech Transfer</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section&#160;7.3.3 (Completion of Manufacturing Tech Transfer).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.69&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Compliance Officers</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 9.4.1 (Establishment of Compliance Program).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.70&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Compliance Program</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 9.4.1 (Establishment of Compliance Program).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.71&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Confidential Information</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any and all non-public or confidential technical, business or other information provided by or on behalf of one Party (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Disclosing</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) to the other Party (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Receiving Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) or any of its Affiliates in connection with this Agreement, whether prior to, on, or after the Effective Date, including under the Existing Confidentiality Agreement.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.72&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Control</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;, &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Controlled</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">,&#8221; or &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Controlling</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, (a) with respect to any Know-How, Patent, material, information or other intellectual property, the possession (whether by sole or joint ownership or license or otherwise, other than the licenses granted hereunder) of the ability to grant access, a right to use, a license or sublicense or any other right to Exploit, as set forth in this Agreement, such Know-How, Patent, material, information or other intellectual property&#59; or (b) with respect to any compound, antibody or product, the possession by a Party of the ability (whether by sole or joint ownership, license or otherwise, other than the licenses granted hereunder) to grant a license or sublicense under Patents that Cover or otherwise claim such compound, antibody or product, or under Know-How that is used in connection with the Exploitation of such compound, antibody, or product, as set forth in this Agreement, in each case ((a) and (b)), without violating the terms of any agreement or other arrangement with any Third Party, or any Applicable Law.  &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.73&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Controlling Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 13.2.2(b).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.74&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Cover</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; or &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Covered</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; or &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Covering</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, with respect to the Licensed Compound or a given Licensed Product in any country and a given Patent in such country, that the making, offering for sale, selling, importing or using of the Licensed Compound or such Licensed Product would, but for any ownership interest in, or license granted under, such Patent, infringe any Valid Claim of such Patent in such country in which that activity occurs.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.75&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Currency Gains and Losses</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the gain or loss resulting from changes in exchange rates between the functional currency and the foreign currency in which the transaction is denominated, to the extent specifically identifiable or reasonably allocable to a Licensed Product for which costs are shared by the Parties hereunder and shall only include the currency gains and losses realized between the end of a Calendar Quarter and the date of invoice payment for that Calendar Quarter.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-7-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.76&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">DAC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 2.5.1 (Establishment of DAC).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.77&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Data</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any and all pre-clinical data (including computational validation, genetic data (including genotype, phenotype and genetic sequencing data), </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">in vitro</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> and </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">in vivo</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> data), clinical data (including enrollment data, study and investigator reports, both preliminary and final, statistical analyses, expert opinions and reports, safety and other electronic databases), and regulatory, Manufacturing, biological, chemical, pharmacological, toxicological, pharmaceutical, physical, analytical, safety and quality control data, information and documentation, whether in written or electronic form.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.78&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Data Protection Law</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any and all Applicable Laws relating to privacy and data protection, direct marketing or the interception or communication of electronic messages, including, to the extent applicable, the United States Health Insurance Portability and Accountability Act of 1996 and its implementing regulations (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">HIPAA</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), the California Consumer Privacy Act of 2018 (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">CCPA</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), and any other such applicable supranational or national legislation, in each case as amended, consolidated, re-enacted or replaced from time to time, including, to the extent applicable, European Data Protection Laws.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.79&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Data Security Breach</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 12.1.4 (Data Breach).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.80&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Data Sharing Initiative</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means GSK&#8217;s policy initiative (as may be amended from time to time), known at the Effective Date as the &#8220;SHARE Initiative&#8221;, to provide researchers with access to Clinical Trial information, including anonymized patient level data, as such initiative is described on https&#58;&#47;&#47;www.clinicalstudydatarequest.com&#47;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.81&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Default Notice</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 16.3 (Termination for Material Breach).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.82&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Deemed Buy-In</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 5.3.2(c).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.83&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Detail</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; or &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Detailing</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, with respect to a Licensed Product, the communication made by a Sales Representative during a Sales Call (a) involving face-to-face contact or virtual meetings (such as through videoconference) with healthcare professionals&#59; (b) describing in a fair and balanced manner the FDA-approved uses and other relevant characteristics of the Licensed Product being detailed&#59; (c) using approved Promotional Materials in an effort to inform healthcare professionals on the Licensed Product for its FDA-approved uses in a manner consistent with Applicable Law&#59; and (d) made at a healthcare professional&#8217;s office or other appropriate venues (including audio or video teleconference) conducive to pharmaceutical product informational communication where the principal objective is to place an emphasis on the Licensed Product with such healthcare professional.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.84&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Detailing Plan</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 9.2.2 (Detailing Plan).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.85&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Detailing Report</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 9.2.3 (Detailing Reports).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.86&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Development</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any or all research and development activities conducted in connection with developing, or seeking, obtaining, or maintaining Regulatory Approvals for, any compound or product (including the Licensed Compound or any Licensed Product), which includes pre-clinical studies and non-clinical studies, Clinical Trials, quality of life assessments, translational research, Diagnostic Device development, pharmacoeconomics, regulatory affairs (including activities performed in support of the CMC (chemistry, manufacturing and controls, or equivalent) section of an IND or BLA </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-8-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">and other Regulatory Filings) and CMC Development.   &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Develop</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; and &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Developing</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; shall have their correlative meanings.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.87&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Development Cost Share End Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 5.2.4(b).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.88&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Development Costs</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the reasonable Out-Of-Pocket Costs and Development FTE Costs incurred by a Party or its Affiliates (a) in the performance of those ongoing Development activities under the Initial Development Plan or Remediation Plan in accordance with, and subject to, Section 3.2.3 (Expedited Dispute Resolution) or Section 5.2.3(b), as applicable, or (b) during the Development Term in the performance of the respective Shared Global Development Activities of such Party that are directly attributable and reasonably allocable to the Development of a Licensed Product, to the extent incurred in accordance with the Joint Development Plan and Joint Development Budget.  &#91;**&#93;.    </font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.89&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Development Costs Report</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 11.4.1 (Reports&#59; Reconciliation Payments).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.90&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Development Excess Costs</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 11.4.2(b).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.91&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Development FTE Costs</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, as applicable with respect to any period, (a) the FTE Rate for the performance of the Initial Development Plan or Remediation Plan as provided in Section 3.2.3 (Expedited Dispute Resolution) or Section 5.2.3(b), as applicable, </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">multiplied</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> by the actual total number of FTEs (or portion thereof) &#91;**&#93;&#59; (b) the FTE Rate for the performance of Shared Global Development Activities, </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">multiplied</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> by the actual total number of FTEs (or portion thereof) &#91;**&#93;&#59; and (c) solely with respect to an Independent Registration Study for which a Deemed Buy-In Occurs, the FTE Rate for the performance of such Independent Registration Study, </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">multiplied by</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> the actual total number of FTEs (or portion thereof) &#91;**&#93; in accordance with Section 5.3.2 (Independent Registration Studies), in each case ((a) and (b)), as applicable, during such period.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.92&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Development Milestone Event</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 11.6.1 (Development Milestones).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.93&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Development</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Milestone</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Payments</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 11.6.1 (Development Milestones).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.94&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Development Term</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, if GSK exercises the Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), the period beginning on the License Effective Date and ending on (a) if no Ongoing Shared Global Development Activities are being conducted as of the Development Cost Share End Date, the Development Cost Share End Date or (b) if any Ongoing Shared Global Development Activities are being conducted as of the Development Cost Share End Date, the completion of such Ongoing Shared Global Development Activities in accordance with the Joint Development Plan.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.95&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Development Report</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 5.2.5 (Development Reporting).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.96&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Diagnostic</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Device</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means a product or service included in the Joint Development Plan and that is designed for use in a diagnostic biomarker assay for use with a Licensed Product for predicting or monitoring the suitability of such Licensed Product for prophylactic or therapeutic use in human patients or defined subpopulations thereof.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-9-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.97&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Disclosing</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 1.71 (Confidential Information).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.98&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Dispute</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 18.1 (Dispute Resolution).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.99&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Dollars</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; or &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">$</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the official currency of the United States of America.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.100&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">DOJ</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 3.8.2 (Antitrust Filings).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.101&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">DPA</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 1.106 (European Data Protection Laws).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.102&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Effective Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in the preamble.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.103&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">EMA</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the European Medicines Agency, or any successor entity thereto performing similar functions for the European Union.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.104&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Enforcing Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 13.3.2(c).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.105&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Entity</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 11.10.3 (No Partnership).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.106&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">European Data Protection Laws</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the General Data Protection Regulation 2016&#47;679, the e-Privacy Directive 2002&#47;58&#47;EC, the Privacy and Electronic Communications Regulations 2003, the UK Data Protection Act 2018 (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">DPA</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), the UK General Data Protection Regulation as defined by the DPA, as amended by the Data Protection, Privacy and Electronic Communications (including amendments, etc.) (EU Exit) Regulations 2019, and any relevant law, statute, declaration, decree, directive, legislative enactment, order, ordinance, regulation, rule or other binding instrument which implements, replaces, adds to, amends, extends, reconstitutes or consolidates such laws from time to time, in each case as amended, consolidated, re-enacted or replaced from time to time.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.107&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">European Union</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the economic, scientific and political organization of member states of the European Union, as it may be constituted from time to time.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.108&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Existing Confidentiality Agreement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means that certain Confidential Disclosure Agreement, dated as of &#91;**&#93;, between GlaxoSmithKline Research and Development Limited and Mersana.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.109&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Existing Mersana Background Patents</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 14.2.1.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.110&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Exploit</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means to Develop, have Developed, make, have made, use, have used, offer for sale, have offered for sale, sell, have sold, export, have exported, import, have imported, Manufacture, have Manufactured, Commercialize, have Commercialized or otherwise exploit.  &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Exploitation</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; and &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Exploiting</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; will be construed accordingly.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.111&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">FDA</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the U.S. Food and Drug Administration, or any successor entity thereto performing similar functions in the United States.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.112&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Field</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means all diagnostic, prophylactic and therapeutic human or animal uses. </font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.113&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Field Monitoring</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 9.4.7(b).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.114&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Finance</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Expert</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 11.14.2 (Specific Financial Disputes).</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-10-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.115&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Financial Working Group</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 10.5 (Financial Working Group).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.116&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">First Commercial Sale</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, with respect to a given Licensed Product in a country, the first commercial sale in an arms-length transaction of such Licensed Product by or on behalf of GSK or any of its Affiliates or Sublicensees in such country following receipt of applicable Marketing Approval of such Licensed Product in such country.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.117&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Force Majeure</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any event beyond the reasonable control of the affected Party, including the following events, in each case, due to reasons other than the affected Party&#8217;s negligence or willful misconduct or any other cause within the reasonable control of the affected Party&#58; embargoes&#59; war or acts of war, including terrorism&#59; insurrections, riots, or civil unrest&#59; strikes, lockouts or other labor disturbances&#59; epidemics (including pandemics), the spread of infectious diseases, and quarantines&#59; fire, floods, earthquakes or other acts of nature&#59; impossibility to obtain materials, components, drug substance, utilities, equipment, supplies, fuel or other required materials, receipt of warning letters, or loss, infection or failure of cell banks&#59; or acts, omissions, or delays in acting by any Governmental Authority (including the refusal of any Regulatory Authority to issue required Regulatory Approvals), and failure of plant or machinery.  The Parties agree the effects of the COVID-19 pandemic that is ongoing as of the Effective Date (including related government orders) may be invoked as a Force Majeure for the purposes of this Agreement even though the pandemic is ongoing and those effects may be reasonably foreseeable (but are not known for certain) as of the Effective Date.  In addition, a Force Majeure may include reasonable measures affirmatively taken by a Party or its Affiliates to respond to any epidemic, pandemic, or spread of infectious disease (including the COVID-19 pandemic), such as requiring employees to stay home, closures of facilities, delays of Clinical Trials, or cessation of activities in response to an epidemic or other Force Majeure event.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.118&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">FTC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 3.8.2 (Antitrust Filings).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.119&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">FTE</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, with respect to employees, agency or contract workers of a Party or its Affiliates, the equivalent of the work of one (1) full time person for one (1) year (consisting of at least &#91;**&#93; hours per year).  Overtime, and work on weekends, holidays and the like shall not be counted with any multiplier (</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">e.g.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, time-and-a-half or double time) toward the number of hours that are used to calculate the FTE contribution.  If any person works partially on other work in a given Calendar Year, then the full-time equivalent to be attributed to such person&#8217;s work hereunder shall be equal to the percentage of such person&#8217;s total work time in such Calendar Year that such person spent working on activities contemplated under this Agreement.  &#91;**&#93;.  Each Party shall track FTEs of its personnel using such Party&#8217;s standard practices and methodologies.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.120&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">FTE Rate</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, unless otherwise agreed by the unanimous decision of the Financial Working Group or by the Parties in writing, (a) commencing on the License Effective Date, with respect to Development activities, &#91;**&#93; Dollars ($&#91;**&#93;) per FTE and (b) with respect to Commercialization activities at a rate to be agreed by the Financial Working Group prior to commencement of Commercialization activities.  The FTE Rate shall be &#91;**&#93; on the first day of every January starting in the Calendar Year following the License Effective Date by a percentage equivalent to the change over the preceding twelve (12) month period in the Consumer Price Index for All Urban Consumers (All Items), or any successor to such published measure, not seasonally adjusted, as published by the U.S. Department of Labor Bureau of Labor Statistics.  &#91;**&#93;.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-11-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.121&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GAAP</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the United States generally accepted accounting principles, consistently applied.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.122&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Gastric Cancer Tumor Type</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means a Tumor Type that is a neoplasm of the stomach or the gastroesophageal junction.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.123&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GCP</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means all applicable Good Clinical Practice standards for the design, conduct, performance, monitoring, auditing, recording, analysis and reporting of Clinical Trials, including, as applicable, (a) FDA regulations and guidelines for good clinical practice, as promulgated by the FDA under 21 CFR Parts 50, 54, 56, 312 and 812, (b) as set forth in European Commission Directive 2001&#47;20&#47;EC relating to the implementation of good clinical practice in the conduct of Clinical Trials on medicinal products for human use, and brought into law by European Commission Directive 2005&#47;28&#47;EC laying down the principles and detailed guidelines for good clinical practice for investigational medicinal products, (c) the International Conference on Harmonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ICH</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) Harmonised Tripartite Guideline for Good Clinical Practice (CPMP&#47;ICH&#47;135&#47;95) and any other guidelines for good clinical practice for trials on medicinal products in the EU, (d) the Declaration of Helsinki (2008), and (e) any further amendments or clarifications with respect to any of the foregoing and any equivalents thereto in the country in which Clinical Trials of a Licensed Product are conducted.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.124&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GLP</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means all applicable Good Laboratory Practice standards, including, as applicable&#58; (a) FDA regulations and guidelines for good laboratory practice, as promulgated by the FDA under 21 CFR Part 58&#59; (b) European Commission Directive 2004&#47;10&#47;EC relating to the application of the principles of good laboratory practices, as may be amended from time to time as well as any Rules Governing Medicinal Products in the European Community Vol. III, ISBN 92.825 9619-2 (ex-OECD principles of GLP)&#59; and (c) any further amendments or clarifications with respect to any of the foregoing and any equivalents thereto in the country in which pre-clinical studies or Clinical Trials of a Licensed Product are conducted.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.125&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Global Royalties</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 11.7.1 (Global Royalties).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.126&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Global Sales Milestone Event</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 11.6.3(a).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.127&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Global Sales Milestone Payment</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 11.6.3(a).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.128&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GMP</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means all applicable Good Manufacturing Practices, including&#58; (a) the applicable part of quality assurance to ensure that products are consistently produced and controlled in accordance with the quality standards appropriate for their intended use, as defined in European Commission Directive 2003&#47;94&#47;EC laying down the principles and guidelines of good manufacturing practice&#59; (b) the principles detailed in the U.S. Current Good Manufacturing Practices, 21 C.F.R. Sections 210, 211, 601, 610 and 820&#59; (c) the Rules Governing Medicinal Products in the European Community, Volume IV Good Manufacturing Practice for Medicinal Products&#59; (d) the principles detailed in the ICH Q7A guidelines&#59; and (e) the equivalent Applicable Laws in any relevant country, each as may be amended and applicable from time to time.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.129&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Government Official</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; (where &#8220;government&#8221; means all levels and subdivisions of governments, </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">e.g.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, local, regional, national, administrative, legislative, executive, or judicial, and royal or ruling families) means (a) any officer or employee of a government or any department, agency or instrumentality of a government (which includes public </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-12-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">enterprises and entities owned or controlled by the state)&#59; (b) any officer or employee of a public international organization such as the World Bank or United Nations&#59; (c) any officer or employee of a political party, or any candidate for public office&#59; (d) any individual defined as a government or public official under Applicable Laws (including anti-bribery and corruption laws) and not already covered by any of the above&#59; or (e) any individual acting in an official capacity for or on behalf of any of the above, in each case ((a) through (e)), including any individual with close family members that are individuals covered by any of the foregoing ((a) through (e)), as applicable, with the capacity, actual or perceived, to influence or take official decisions affecting the business of a Party.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.130&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Governmental Authority</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any multinational, federal, national, state, provincial, local or other entity, office, commission, bureau, agency, political subdivision, instrumentality, branch, department, authority, board, court, arbitral or other tribunal, official or officer, exercising executive, judicial, legislative, police, regulatory, or administrative authority, Taxing Authority, or functions of any other nature pertaining to government.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.131&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in the preamble.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.132&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Arising Patents</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the Product-Specific Arising Patents and the GSK Solely-Developed Arising Patents.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.133&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Arising Technology</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the GSK Solely-Developed Arising Know-How, Product-Specific Arising Know-How and the GSK Arising Patents.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.134&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Background Know-How</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any Know-How (other than any Arising Know-How) that is (a) Controlled by GSK or its Affiliates as of the License Effective Date or during the Collaboration Term&#59; and (b) &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.135&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Background Patent</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any Patent (other than any Arising Patents) that (a) is Controlled by GSK or its Affiliates as of the License Effective Date or during the Collaboration Term&#59; and (b) (i) claims any GSK Background Know-How or (ii) &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.136&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Background Technology</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the GSK Background Know-How and the GSK Background Patents.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.137&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Brand Team</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 8.3.1 (Establishment of CAC).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.138&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Development Activities</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 5.5 (GSK Development Activities).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.139&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Indemnitees</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 15.1.1 (Indemnification by Mersana).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.140&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Prosecuted Patents</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 13.2.2(a).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.141&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Sole Prosecution Patents</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 13.2.3 (GSK Sole Prosecution Patents).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.142&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Solely-Developed Arising Know-How</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;  means any Arising Know-How that is first discovered, developed, generated, invented, derived or created solely by or on behalf of GSK or any of its Affiliates (it being understood that any activities carried out by or on behalf of Mersana under this Agreement shall not be construed or interpreted to be </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-13-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">carried out by or on behalf of GSK for purposes hereof)&#59; but excluding any Product-Specific Arising Know-How, Platform-Specific Arising Know-How or Joint Arising Know-How.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.143&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Solely-Developed Arising Patent</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means each Arising Patent that claims any GSK Solely-Developed Arising Know-How&#59; but excluding any Product-Specific Arising Patents, Platform-Specific Arising Patents or Joint Arising Patents.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.144&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Solely-Developed Arising Technology</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means (a) all GSK Solely-Developed Arising Know-How and (b) all GSK Solely-Developed Arising Patents.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.145&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Technology</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means (a) all GSK Background Technology, (b) all GSK Arising Technology&#59; and (c) GSK&#8217;s joint ownership interest in Joint Arising Technology. </font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.146&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Territory&#8221;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> means the Territory excluding the Shared Territory.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.147&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Territory Royalties</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 11.7.2 (GSK Territory Royalties).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.148&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Territory Sales Milestone Event</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 11.6.3(b).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.149&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Territory Sales Milestone Payment</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section&#160;11.6.3(b).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.150&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Guidelines</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 9.4.3 (Applicable Laws and Guidelines).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.151&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">HER2</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means human epidermal growth factor receptor 2, also known as CD340 or Her-2&#47;neu encoded by the ERBB2 gene.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.152&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">HIPAA</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 1.78 (Data Protection Law).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.153&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">HSR Act</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the Hart Scott Rodino Antitrust Improvements Act.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.154&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">HSR Filings</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 3.8.2 (Antitrust Filings).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.155&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Human Biological Samples</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any human biological material (including any derivative or progeny thereof), including any portion of an organ, any tissue, skin, bone, muscle, connective tissue, blood, cerebrospinal fluid, cells, gametes, or sub-cellular structures such as DNA, or any derivative of such biological material such as stem cells or cell lines, and any human biological product, including hair, nail clippings, teeth, urine, feces, breast milk and sweat.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.156&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">IFRS</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the International Financial Reporting Standards as adopted by the United Kingdom, applied on a consistent basis.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.157&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Increased Withholding Taxes&#8221;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> has the meaning set forth in Section 11.10.1(d).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.158&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">IND</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means an Investigational New Drug Application (including any amendments thereto) filed with the FDA pursuant to 21 CFR Part 312, or any equivalent filing with any relevant Regulatory Authority in any jurisdiction.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-14-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.159&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Indemnifying Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 15.1.3 (Indemnification Procedures).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.160&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Indemnitee</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 15.1.3 (Indemnification Procedures).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.161&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Independent Registration Studies</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 5.3.2(a).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.162&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Indication</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.163&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Infringement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 13.3.1 (Notification of Infringement).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.164&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Infringement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Notice</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 13.3.1 (Notification of Infringement).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.165&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Initial Development Plan</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 2.1 (Initial Development Plan).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.166&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Initiation</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, with respect to a given Clinical Trial, the dosing of the first patient for the first time in such Clinical Trial.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.167&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Institutional</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Review</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Board</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means an institutional review board or independent ethics committee that reviews the methods proposed for research and development activities to ensure such methods satisfy ethical requirements.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.168&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Internal</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Policies</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, with respect to a Party, such Party&#8217;s health care compliance, ethical, reputational, anti-bribery and corruption and other policies applicable to such Party&#8217;s activities under this Agreement, and any standard operating procedures implementing such policies, including the codes of conduct of any self-regulatory body of which that Party is a member.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.169&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">&#91;**&#93;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 10.3.2(f).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.170&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">JCC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 10.4.1 (Establishment of JCC).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.171&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">JDC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 10.2.1 (Establishment of the JDC).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.172&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">JMC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 10.3.1 (Establishment of JMC).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.173&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Joint Arising Know-How</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any Arising Know-How that is first discovered, developed, generated, invented, derived or created jointly by or on behalf of (a) Mersana or any of its Affiliates, on the one hand, and (b) GSK or any of its Affiliates, on the other hand&#59; but excluding any Platform-Specific Arising Know-How or Product-Specific Arising Know-How.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.174&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Joint Arising Patent</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means each Arising Patent that claims any Joint Arising Know-How&#59; but excluding any Platform-Specific Arising Patents or Product-Specific Arising Patents.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.175&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Joint Arising Technology</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means (a) all Joint Arising Know-How and (b) all Joint Arising Patents.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.176&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Joint Development Budget</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 5.2.2(c).</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-15-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.177&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Joint Development Forecast</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 5.2.2(c).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.178&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Joint Development Plan</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 5.2.2(a).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.179&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">JSC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; 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or &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana&#8217;s Knowledge</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the actual knowledge of Mersana&#8217;s &#91;**&#93; in each case, as of the Effective Date or License Effective Date, as applicable, after reasonable due inquiry by such Person(s), including, as appropriate, inquiring of their respective direct reports or other appropriate subject matter experts that are personnel of Mersana.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.182&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Legal Requirement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 12.2.2 (Public Statements).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.183&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">License Effective Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 3.8.4 (License Effective Date).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.184&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Licensed Compound</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means Mersana&#8217;s proprietary ADC known as XMT-2056, as described more fully on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 1.184</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.185&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Licensed Product</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any product that is, constitutes, incorporates, comprises or contains a Licensed Compound, in all forms, presentations, strengths, doses and formulations, including any Combination Product.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.186&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Loan Agreement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the Loan and Security Agreement with Oxford Finance LLC and the lenders party to the Loan and Security Agreement dated as of October 29, 2021, as amended by the First Amendment dated as of February 17, 2022.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.187&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">&#91;**&#93;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 2.7.1 &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.188&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Losses</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 15.1.1 (Indemnification by Mersana).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.189&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Lung Cancer Tumor Type</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means a Tumor Type that is a neoplasm of the lung that can be of the small cell or the non-small cell, either the squamous or non-squamous, subtype.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.190&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Major European Countries</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.191&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Manufacture</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means all activities related to the synthesis, making, production, processing, purifying, formulating, filling, finishing, packaging, serialization, labeling, shipping, storage or holding of any compound or product (including the Licensed Compound or any Licensed Product), or any component or intermediate thereof, </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-16-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">including process qualification and validation, scale-up, qualification, validation, pre-clinical, clinical and commercial capacity reservation, production, and analytic development, validation, testing, product characterization, release, stability testing, quality assurance, and quality control.  &#8220;Manufacturing&#8221; 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percent (&#91;**&#93;%) to cover the costs of global shared services, including for procurement and quality support activities, in each case, as determined in accordance with applicable Accounting Standards, and the terms and conditions of this Agreement, incurred in Manufacturing or acquisition of such Licensed Product, in each case, to the extent directly attributable and reasonably allocable to such Licensed Product and subject to discussion by the Financial Working Group, which shall include the following costs incurred by a Party or its Affiliates&#58; </font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Standard Cost of Goods Manufactured</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; 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are actual costs of Manufacturing versus Standard Cost of Goods Manufactured and include direct materials variances (including material usage variances and purchase price variances), direct labor variances, and indirect expenses and overhead variances &#91;**&#93;, which allocation is made in a manner consistent with customary practice &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.192.2&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">To the extent Licensed Products are Manufactured by Third Party contract manufacturing organizations and similar contractors (collectively, &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">CMOs</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), the Out-of-Pocket Costs invoiced by and paid to such CMO(s) for the Manufacture of such product, </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">plus</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> a Manufacturing mark-up of &#91;**&#93; 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Subject to the foregoing, all Manufacturing Costs shall be calculated on a </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">pro-rata</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> basis based on the use of the components of Manufacturing activities devoted to the Licensed Products as opposed to all other products using the same components.  In addition, Manufacturing Costs shall exclude costs that result from the gross negligence or willful misconduct of a Party, its Affiliates, Sublicensees or Third Party manufacturers or a failure by a Party, its Affiliates, Sublicensees or Third Party manufacturers to follow the documented manufacturing process or any other Manufacturing defect arising from such Manufacture of the applicable Licensed Product.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.193&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Manufacturing Tech Transfer</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 7.3 (Manufacturing Technology Transfer).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.194&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">&#91;**&#93;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.195&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Manufacturing Tech Transfer Plan</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 7.3.1 (Manufacturing Technology Transfer Plan).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.196&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Manufacturing Transition Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 7.3.3 (Completion of Manufacturing Tech Transfer).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.197&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Marketing Approval</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, with respect to a Licensed Product and a given country or other jurisdiction in the Territory, receipt of approval of an MAA for such Licensed Product from the applicable Regulatory Authority(ies) in such country or jurisdiction, &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.198&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Marketing Approval Application</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; or &#8220;MAA&#8221; means a BLA or any corresponding application in an applicable country or jurisdiction outside of the United States, including, with respect to the European Union, an application for Marketing Approval filed with the EMA pursuant to the centralized approval procedure or with the applicable national Regulatory Authority of a country in the European Union with respect to the mutual recognition procedure, decentralized procedure or any other national approval.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.199&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Marketing Materials</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means Promotional Materials, Regulatory Filings relating to Promotional Materials, and training program and related materials contemplated by Section 9.5.3 (Product Specific Training).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.200&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Material Amendment</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 2.1 (Initial Development Plan).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.201&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Materials</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any chemical or biological substances, including any biological or chemical compounds, drug products, Human Biological Samples, or other materials, </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-18-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">regardless of the route of transfer, that are supplied by a Party or its nominee to the other Party or its nominee for use in the conduct of activities under this Agreement, including activities set forth in the Joint Development Plan.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.202&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Materials Receiving Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 5.2.12(a).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.203&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Materials Transferring Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 5.2.12(a).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.204&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in the preamble.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.205&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana &#91;**&#93; Agreement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means that certain &#91;**&#93; Collaboration Agreement, by and between &#91;**&#93; and Mersana, dated &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.206&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Arising Patents</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the Platform-Specific Arising Patents and the Mersana Solely-Developed Arising Patents.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.207&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Arising Technology</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the Mersana Solely-Developed Arising Know-How, the Platform-Specific Arising Know-How and the Mersana Arising Patents.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.208&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Background Know-How</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any Know-How owned or Controlled by Mersana or any of its Affiliates as of the Effective Date or during the Term that (a) encompasses or relates to the Licensed Compound or any Licensed Product, including, in each case, its composition, formulation, co-administrations or combinations, product by process, method of use, manufacture, preparation or administration&#59; or (b) is necessary or useful for (i) GSK (or any of its Affiliates or Sublicensees) to perform any of its obligations under this Agreement or (ii) the Development, Manufacture, use or Commercialization of the Licensed Compound or any Licensed Product&#59; but, in each case ((a) or (b)), excluding any Arising Know-How and subject to Section 13.6 (New Third Party In-Licenses).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.209&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Background Patent</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any Patent owned or Controlled by Mersana or any of its Affiliates as of the Effective Date or during the Term, that Covers or otherwise claims (a) the Licensed Compound or any Licensed Product (including its composition, formulation, co-administration or combination, product by process, method of use, manufacture, preparation or administration) or the Development, Manufacture, use or Commercialization thereof, as applicable&#59; or (b) any Mersana Background Know-How but, in each case ((a) or (b)), excluding any Arising Patents and subject to Section 13.6 (New Third Party In-Licenses).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.210&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Background Technology</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the Mersana Background Know-How and the Mersana Background Patents.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.211&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Development Cost Cap</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 5.2.4(a).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.212&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Disclosure Schedule</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 3.8.3(a).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.213&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Exercise Period</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 9.1.1 (Exercise of Profit Share Election).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.214&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Indemnitees</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 15.1.2 (Indemnification by GSK).</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-19-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.215&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Know-How</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means Mersana Background Know-How, Mersana Solely-Developed Arising Know-How, Platform-Specific Arising Know-How and Mersana&#8217;s interest in Joint Arising Know-How.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.216&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana &#91;**&#93; Agreement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means that certain License Agreement, by and between &#91;**&#93; and Mersana, dated &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.217&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana ODP Diligence Obligations</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 3.5 (Inability of Mersana to Deliver Option Data Package).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.218&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Opt-Out Right</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 5.3.1(a).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.219&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Option Package</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 9.1.1 (Exercise of Profit Share Election).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.220&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Patent</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means each Mersana Background Patent, each Mersana Arising Patent and Mersana&#8217;s interest in each Joint Arising Patent.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.221&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Platform</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means Mersana&#8217;s proprietary &#91;**&#93; used to conjugate Mersana&#8217;s proprietary STING Agonist included in the Licensed Compound (also known as Immunosynthen)&#91;**&#93;.  </font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.222&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Product-Related Patent</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means (a) any Mersana Background Patent listed on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 1.222</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> &#91;**&#93;&#59; 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has the meaning set forth in Section 4.4.2 (Mersana Retained Rights).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.225&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Solely-Developed Arising Know-How</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any Arising Know-How that is first discovered, developed, generated, invented, derived or created solely by or on behalf of Mersana or any of its Affiliates (it being understood that any activities carried out by or on behalf of GSK under this Agreement shall not be construed or interpreted to be carried out by or on behalf of Mersana for purposes hereof)&#59; 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means (a) all Mersana Solely-Developed Arising Know-How&#59; and (b) all Mersana Solely-Developed Arising Patents.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.228&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Technology</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means (a) all Mersana Background Technology&#59; (b) all Mersana Arising Technology&#59; and (c) Mersana&#8217;s interest in all Joint Arising Technology.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.229&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Upstream Agreement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means each of (a) the Mersana &#91;**&#93; Agreement&#59; (b) the Mersana &#91;**&#93; Agreement&#59; and (c) each New Mersana Upstream Agreement.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-20-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.230&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Milestone Event</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means each of the Near Term Milestone Events, the Development Milestone Events, the Regulatory Milestone Events and the Sales Milestone Events, as the context requires.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.231&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Milestone Payment</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means each of the Near Term Milestone Payments, the Development Milestone Payments, the Regulatory Milestone Payments and the Sales Milestone Payments, as the context requires.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.232&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">MTR</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 5.2.12(a).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.233&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Near Term Milestone Event</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 11.2 (Near Term Milestones).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.234&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Near Term Milestone Payment</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 11.2 (Near Term Milestones).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.235&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Negotiation Notice</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 4.6.1 (Negotiation Notice).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.236&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Negotiation Period</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 4.6.2 (ROFN Negotiation).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.237&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Net Sales</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, with respect to a Licensed Product, the gross invoiced sales amounts for such Licensed Product sold by or on behalf of GSK or any of its Affiliates or Sublicensees in an arm&#8217;s length transaction to a Third Party (but not including sales by and between GSK and its Affiliates and Sublicensees unless an Affiliate or Sublicensee is the last entity in the distribution chain of such Licensed Product) less the following deductions from such gross amounts, to the extent such deductions are actually incurred, allowed, paid, accrued or specifically allocated, and deducted from gross invoiced sales amounts as reported by GSK in its financial statements in accordance with IFRS, applied on a consistent basis&#58;</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">To the extent that GSK or any of its Affiliates or Sublicensees receives consideration other than, or in addition to, cash upon the sale or disposition of a Licensed Product in a country, Net Sales will be calculated based on the price charged for such Licensed Product in such country during the preceding royalty period, or, in the absence of such sales, based on GSK&#8217;s (or its applicable Affiliate&#8217;s or Sublicensee&#8217;s, as applicable) reasonable determination of the fair market value of such Licensed Product.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Notwithstanding the foregoing, Net Sales shall not include any transfers or disposals of the Licensed Product&#58; (A) in connection with patient assistance programs&#59; (B) for charitable or promotional purposes&#59; (C) for preclinical, clinical, regulatory or governmental purposes or under so-called &#8220;named patient&#8221; or other limited access programs&#59; or (D) for use in any tests or studies, including Clinical Trials, reasonably necessary to comply with any Applicable Law or request by a Regulatory Authority, &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">In the event of a sale of a Combination Product in a country where all of the active ingredient components in that Combination Product are also sold separately in that country as sole active ingredient products, the Net Sales of such Combination Product, for the purposes of determining Royalty payments and achievement of Global Sales Milestone Events and GSK Territory Sales </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-21-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Milestone Events, as well as with respect to the calculation of Net Sales of Combination Products for the purpose of determining Pre-Tax Profit or Loss for the Shared Territory (if applicable), shall be determined by multiplying the Net Sales of such Combination Product by the fraction, A&#47;(A+B) where A is the weighted (by sales volume) average sale price in a particular country of the Licensed Product containing the Licensed Compound as the sole active ingredient when sold separately in finished form in such country and B is the weighted average sale price in that country of the product(s) containing the Other Component(s) as the sole active ingredient when sold separately in finished form.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">If the weighted average gross sale price of either or both of the Licensed Product or the Other Components in such Combination Product cannot be determined, the Net Sales of such Combination Product shall be based upon the &#91;**&#93;.  GSK, following good faith discussions with Mersana (which may be through the Financial Working Group during the term of the Financial Working Group), shall propose &#91;**&#93;.  Within &#91;**&#93; following GSK&#8217;s submission of such proposal to Mersana, the Parties shall meet to discuss, acting reasonably and in good faith, and agree upon (such agreement not to be unreasonably withheld, conditioned or delayed) the &#91;**&#93;.  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has the meaning set forth in Section 18.2 (Escalation to Senior Executives).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.249&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Ongoing Shared Global Development Activities</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section&#160;5.2.4(b).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.250&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Option</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 3.1 (Option).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.251&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Option Data Package</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the package of Data, information and materials as set forth on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 1.251</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, as the same may be amended by mutual agreement of the Parties &#91;**&#93;.  </font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.252&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Option Data Package Delivery Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the date on which Mersana delivers the complete Option Data Package pursuant to Section 3.2 (Option Data Package).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.253&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Option Data Package Outside Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 3.5 (Inability of Mersana to Deliver Option Data Package).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.254&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Option Diligence Data</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; the meaning set forth in Section 3.3.1 (Option Diligence Data).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.255&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Option Exercise Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 3.8.1 (Exercise of Option).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.256&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Option Exercise Notice</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 3.8.1 (Exercise of Option).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.257&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Option Exercise Fee</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 11.3 (Option Exercise Fee).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.258&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Option Exercise Period</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 3.8.1 (Option Exercise Period). </font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.259&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Other Antitrust Filings</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 3.8.2 (Antitrust Filings).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.260&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">&#91;**&#93;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; 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means all patents and pending patent applications (including inventor&#8217;s certificates and utility models) and any patents issuing therefrom, in any country in the Territory, including any and all provisionals, non-provisionals, substitutions, continuations, continuations-in-part, divisional and other continuing applications, supplementary protection certificates, renewals, and any and all reissues, extensions, registrations, reexaminations, confirmations, registrations and patents of addition on any of the foregoing.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.272&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Payee</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; 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means information that can be used to identify an individual, either alone or when combined with other personal or identifying information that is linked or linkable to a specific individual, which may include (alone or in combination)&#58; (a) a first and last name&#59; (b) a home or other physical address, including street name and name of city or town&#59; (c) an email address or other online contact information, such as an instant messaging user identifier or a screen name that reveals an individual&#8217;s email address&#59; (d) a telephone number&#59; (e) a social security number&#59; (f) a bank, loan, or credit card account number&#59; (g) a persistent identifier, such as a customer number held in a &#8220;cookie&#8221; or processor serial number, that is combined with other available data that identifies an individual consumer&#59; or (h) any information that is combined with any of (a) through (g) above.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.277&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Phase 1 Clinical Trial</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; 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has the meaning set forth in Section 7.2.2(a).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.301&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">R&#38;D Compliance Officer</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 5.2.11 (R&#38;D Ethics &#38; Compliance).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.302&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Receiving Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; 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means any filing, registration, or regulatory application or submission filed with a Regulatory Authority, including with respect to any Regulatory Approvals or other clearances arising from the foregoing, and all notifications, communications, correspondence made to, received from, or otherwise conducted with a Regulatory Authority, as well as minutes of any material meetings, telephone conferences or discussions with such Regulatory Authority, in each case related to Exploiting a pharmaceutical or biologic product in a particular country or jurisdiction.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.307&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Regulatory Milestone Event</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; 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has the meaning set forth in Section 6.2.1 (Regulatory Responsibilities).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.310&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Reimbursement Approval</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means an approval, agreement, determination, or other decision by an applicable Governmental Authority that establishes prices charged to end-users for biopharmaceutical products or amounts that will be reimbursed by the Governmental Authorities or Regulatory Authorities in the Territory, or any other approvals related to pricing, reimbursement or access to a pharmaceutical or biologic product (including all activities related to tenders and contracts).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.311&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Remediation Activities</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 3.7.1.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.312&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Remediation Plan</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 3.7.1.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.313&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Remediation Plan Outside Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means (a) if GSK has the right to specify a Remediation Plan following the Option Data Package Outside Date pursuant to Section 3.5.2(b)(2), the earlier of (i) the Option Data Package Delivery Date or (ii) the date that is &#91;**&#93; following the Option Data Package Outside Date&#59; or (b) if GSK has the right to specify a Remediation Plan following a material breach by Mersana of the Mersana ODP Diligence Obligations pursuant to Section 3.6.2, the earlier of (i) the date that is &#91;**&#93; following the date on which the applicable cure period with respect to such material breach expires in accordance with Section 3.6 (Material Breach of Mersana ODP Diligence Obligations) or (ii) the Option Data Package Delivery Date, as applicable.  </font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.314&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Royalties</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any and all of the Global Royalties or the GSK Territory Royalties, as the context requires.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.315&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Royalty Term</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, on a country-by-country and Licensed Product-by-Licensed Product basis, the period commencing on the First Commercial Sale of such Licensed Product in such country and ending upon the latest to occur of&#58; (a) the expiration of the last to expire Valid Patent Claim in such country of (i) any Mersana Patent or (ii) any Assigned Product-Specific Arising Patent, &#91;**&#93;&#59; (b) twelve (12) years from the First Commercial Sale of such Licensed Product in such country&#59; or (c) the expiration of Regulatory Exclusivity for such Licensed Product in such country.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-27-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.316&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Sales Call</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means a personal visit (whether by face-to-face contact or virtual meetings (such as through videoconference)) by a Sales Representative to &#91;**&#93;, with the purpose of promoting the Licensed Product in order to cause such healthcare professional, opinion leader, or thought leader to prescribe or recommend such Licensed Product.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.317&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Sales Representatives</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means pharmaceutical sales representatives employed or contracted for by a Party or its Affiliates to conduct Detailing with respect to the Licensed Products in accordance with the terms of this Agreement.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.318&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Selected Detailing Participation Level</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 9.2.1 (Exercise of Co-Promotion Right).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.319&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Senior Executive</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 18.2 (Escalation to Senior Executives).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.320&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Shared Global Development Activities</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, subject to Section&#160;5.2.4(b), all activities that (a) are (i) conducted by or on behalf of the Parties or their respective Affiliates and Sublicensees after the License Effective Date and (ii) directed to the Development of the Licensed Compound and Licensed Products (including any Combination Products or Combination Therapies), through the completion of Pivotal Clinical Trials or any other required Development  activities, as necessary to obtain and maintain Marketing Approvals for the Licensed Products (including any Combination Products or Combination Therapies) in the United States or European Union (excluding Independent Registration Studies), regardless of whether such activities are also intended to obtain or maintain Marketing Approval for any Licensed Product in any other country in the Territory or (b) deemed to be Shared Global Development Activities pursuant to Section&#160;3.2.3 (Expedited Dispute Resolution) or Section 5.2.3(b).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.321&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Shared Territory</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, solely if Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), the United States.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.322&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Shared Territory Commercialization Budget</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section&#160;9.1.2 (Effect of Profit Share Election).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.323&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Shared Territory Commercialization Estimates</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section&#160;9.1.1 (Exercise of Profit Share Election).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.324&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Shared Territory Commercialization Forecast</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section&#160;9.1.2 (Effect of Profit Share Election).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.325&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">STING</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; 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has the meaning set forth in Section 10.6 (Other Subcommittees).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.328&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Subcommittee Deadlock</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 10.8.1 (Committee Decision Making).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.329&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Sublicensee</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 4.3 (Sublicensing).</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-28-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.330&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Tax</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; or &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Taxes</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any present or future taxes, levies, imposts, duties, charges, contributions, withholding, assessments or fees of any nature (including interest, penalties and additions thereto) imposed, collected or assessed by or payable to a Tax Authority.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.331&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Tax Authority</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any government, state or municipality or any local, state, federal or other authority, body or official in the Territory exercising a fiscal, revenue, customs or excise function (including the United Kingdom government&#8217;s taxing authority, Her Majesty&#8217;s Revenue and Customs).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.332&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Term</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 16.1.1 (General).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.333&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Terminated Product</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, if this Agreement is terminated in accordance with Section 16.2 (Termination by GSK for Convenience), Section 16.3 (Termination for Material Breach), Section 16.5 (Termination for Insolvency) or Section 16.6 (Termination for Lack of Antitrust Clearance), as applicable, all Licensed Products, in each case, solely in the form that each such terminated Licensed Product was being Developed or Commercialized by or on behalf of GSK or any of its Affiliates or Sublicensees immediately prior to the effective date of such termination.  Notwithstanding anything to the contrary in the foregoing, &#8220;Terminated Product&#8221; excludes all Other Component(s) included in any Combination Product.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.334&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Territory</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means all countries and territories in the world.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.335&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Third</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means a Person other than (a) Mersana and its Affiliates, and (b) GSK and its Affiliates.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.336&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Third Party Infringement Claim</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 13.4.1 (Notice&#59; Control).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.337&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Third Party Infringement Costs</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in the Pre-Tax Profit or Loss Schedule.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.338&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Third Party Licensing Payments</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in the Pre-Tax Profit or Loss Schedule.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.339&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Trigger Notice</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 4.6.1 (Negotiation Notice).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.340&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Tumor Type</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means a type of cancer that differs from another type of cancer with respect to the histology and origin of the tumor, including Breast Cancer Tumor Type, &#91;**&#93;, Gastric Cancer Tumor Type, Lung Cancer Tumor Type and &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.341&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">&#91;**&#93;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.342&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">United States</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; or &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">U.S.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means the United States and its territories and possessions.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.343&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Update</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means, with respect to the Joint Development Plan, Joint Development Budget, Joint Development Forecast, Shared Territory Commercialization Budget, Shared Territory Commercialization Forecast, Detailing Plan or study plan and budget for an Independent Registration Study, as applicable, a new version of such plan, budget or forecast (as applicable) that covers the &#91;**&#93; the then-current plan, budget or forecast (as applicable).  &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Updated</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; shall have a corresponding meaning.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.344&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">USPPs</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the meaning set forth in Section 9.4.4 (Business Practices).</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-29-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.345&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Valid Patent Claim</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means a claim of (a) any issued, unexpired Patent that has not lapsed, been revoked, cancelled or abandoned, been dedicated to the public, disclaimed, nor held finally invalid or unenforceable by a court of competent jurisdiction in an unappealed or unappealable decision and which has not been held unenforceable through disclaimer or otherwise, or (b) any patent application (including patent applications covering or claiming joint inventions) that has been pending for less than &#91;**&#93; from priority filing date in the relevant jurisdiction.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">1.346&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">VAT</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means any value added, sales, use, purchase, turnover or consumption tax, as may be applicable in any relevant jurisdiction, including value added tax chargeable under legislation implementing EU Council Directive 2006&#47;112&#47;EC.</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ARTICLE 2<br>INITIAL DEVELOPMENT PLAN&#59; PRE-OPTION EXERCISE TERM</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">2.1&#160;&#160;&#160;&#160;Initial Development Plan</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  An initial development plan (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Initial Development Plan</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) setting forth the proposed clinical and non-clinical activities for the Development &#91;**&#93; of the Licensed Compound and Licensed Products in the Territory by and on behalf of Mersana and its Affiliates during the Pre-Option Exercise Term is attached hereto as </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 2.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  During the Pre-Option Exercise Term, (a) except with respect to Material Amendments, Mersana shall have the right to amend the Initial Development Plan after submitting each such amendment in writing to the DAC for review and considering GSK&#8217;s comments in good faith with respect to any such amendment&#59; and (b) with respect to Material Amendments to the Initial Development Plan, Mersana shall propose each Material Amendment to GSK&#8217;s Alliance Manager, and GSK shall use Commercially Reasonable Efforts to review and approve or otherwise respond to such proposed Material Amendment within &#91;**&#93; (but in any event within &#91;**&#93;) following receipt of such proposed Material Amendment from Mersana, which response may include a request to revise such Material Amendment&#59; provided that (i) if GSK does not approve a given Material Amendment, GSK shall inform Mersana (via the DAC) of GSK&#8217;s basis for such objection&#59; and (ii) if GSK does not approve a given Material Amendment within &#91;**&#93; following receipt of such proposed Material Amendment from Mersana (or if Mersana does not agree to any revisions to such Material Amendment requested by GSK in its response to such Material Amendment), then either Party may submit such dispute to the Senior Executives of both Parties for resolution&#59; provided, further, that, if the Senior Executives cannot resolve such matter within &#91;**&#93; of submission, then, notwithstanding Article 18 (Dispute Resolution), &#91;**&#93; with respect to such Material Amendment and &#91;**&#93; such Material Amendment. GSK shall not unreasonably withhold, condition, or delay any consent to any Material Amendment requested by Mersana.  As used herein, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Material Amendment</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; to the Initial Development Plan shall mean any amendment to the Initial Development Plan that &#91;**&#93;.  </font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">2.2&#160;&#160;&#160;&#160;Conduct of Activities During Pre-Option Exercise Term</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">2.2.1&#160;&#160;&#160;&#160;General</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to the terms and conditions of this Agreement (including this Article 2 (Initial Development Plan&#59; Pre-Option Exercise Term)), during the Pre-Option Exercise Term, Mersana shall, either itself or through its Affiliates or, subject to Section 2.3 (Subcontracting), Third Party subcontractors, at its sole cost and expense (a) conduct all Development of the Licensed Compound and Licensed Products in the Field in the Territory in accordance with the then-current Initial Development Plan&#59; and (b) use Commercially Reasonable Efforts to (i) perform the activities set forth in the then-current Initial Development Plan in accordance with the timelines set </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-30-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">forth therein and otherwise in a manner consistent with delivering a complete Option Data Package to GSK in accordance with Section 3.2 (Option Data Package) and (ii) deliver a complete Option Data Package to GSK in accordance with Section 3.2 (Option Data Package).  Without limiting the foregoing, Mersana shall be responsible for preparing and obtaining all necessary approvals and clearances, including ethics committee approvals, customs clearances and patient authorizations or informed consent forms necessary for the conduct of any Clinical Trial under the Initial Development Plan, including ensuring that all such patient authorizations and consents will permit the sharing and transfer of Data arising from Clinical Trials of the Licensed Products with GSK in accordance with this Agreement (including the granting of the licenses contemplated to be granted to GSK hereunder if GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date)), in each case, in accordance with applicable Data Protection Laws or any other similar Applicable Laws.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">2.2.2&#160;&#160;&#160;&#160;No Outside Exploitation</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Notwithstanding anything to the contrary contained herein, during the Pre-Option Exercise Term, Mersana shall not, and shall cause its Affiliates not to, directly or indirectly, by itself or with or through any Third Party, Develop, Manufacture or otherwise Exploit the Licensed Compound or any Licensed Product (including any Combination Product or as a monotherapy or for use in a Combined Therapy) in the Territory, or grant a Third Party any rights to do so, except as contemplated under the Initial Development Plan and, in all cases, in accordance with this Agreement.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">2.3&#160;&#160;&#160;&#160;Subcontracting</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  During the Pre-Option Exercise Term, Mersana (or any of its Affiliates) may perform any of its obligations under the Initial Development Plan through any Third Party subcontractor&#59; provided that (a) Mersana shall keep the DAC reasonably informed with respect to any such Third Party subcontractors performing any activities on behalf of Mersana under the Initial Development Plan, including advanced written notice of the selection of any new Third Party subcontractor during the Pre-Option Exercise Term (and the work to be subcontracted) or any material expansion in the scope of activities to be performed by any Third Party subcontractors under the Initial Development Plan and shall consider in good faith any comments GSK provides via the DAC in connection therewith&#59; and (b) any agreement between Mersana (or any of its Affiliates) and any such Third Party subcontractor shall (i) be consistent with Mersana&#8217;s obligations under this Article 2 (Initial Development Plan&#59; Pre-Option Exercise Term) and any other applicable terms of this Agreement, including confidentiality and non-use provisions applicable to any of GSK&#8217;s Confidential Information that will be shared with such subcontractor that are no less protective of such Confidential Information than are those set forth in Section 12.1 (Confidentiality) &#91;**&#93;.  Notwithstanding the foregoing, any subcontract granted or entered into by Mersana (or any of its Affiliates) as contemplated by this Section 2.3 (Subcontracting), shall not relieve Mersana (or such Affiliates, as applicable) from any of its obligations under this Agreement and Mersana shall remain responsible for the performance of its activities by its subcontractors in accordance with the applicable terms of this Agreement.  </font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">2.4&#160;&#160;&#160;&#160;Compliance</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Mersana and its Affiliates shall, and shall require their Third Party subcontractors to, as applicable, conduct their activities under this Article 2 (Initial Development Plan&#59; Pre-Option Exercise Term), including all activities under the Initial Development Plan, in a good scientific manner and in compliance with Applicable Law, including (if applicable) laws regarding the environment, safety and industrial hygiene, </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-31-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">and GMP, GLP, GCP, informed consent and Institutional Review Board regulations, current standards for pharmacovigilance practice, and all applicable requirements relating to the protection of human subjects&#59; &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">2.5&#160;&#160;&#160;&#160;Development Advisory Committee</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">2.5.1&#160;&#160;&#160;&#160;Establishment of DAC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  No later than &#91;**&#93; following the Effective Date, the Parties shall establish a Development Advisory Committee (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">DAC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), which shall be composed of &#91;**&#93; representatives from each of Mersana and GSK.  The DAC shall serve an informational and advisory purpose only and shall have no decision-making authority.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">2.5.2&#160;&#160;&#160;&#160;Responsibilities of the DAC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The DAC shall review and discuss (a) the conduct and progress of the Development (including Manufacturing-related Development) of the Licensed Compound and Licensed Products under the Initial Development Plan (and the Remediation Plan, as applicable), including any Data or information shared pursuant to Section 2.6 (Initial Development Reporting) and any issues or circumstances of which Mersana is aware that may prevent or adversely affect in a material manner its future performance of activities to be conducted under the Initial Development Plan&#59; (b) proposed amendments to the Initial Development Plan&#59; (c) whether activities under the Initial Development Plan have been or are being performed in accordance with the timelines set forth therein&#59; (d) the progress of (i) &#91;**&#93; and (ii) &#91;**&#93;, in each case ((i) and (ii)) pursuant to Section 2.7 (Existing Mersana Upstream Agreements)&#59; (e) any matters falling within the remit of Section 3.4 (Limitations Based on Patient Safety), Section 3.5.1 or Section 3.7.2, as applicable&#59; (f) any Remediation Plan (and any proposed amendments thereto)&#59; and (g) in consultation with the Patent Liaisons, where applicable, any proposed publications or presentations as described in Section 12.4.1 (Publication During Pre-Option Exercise Term).  </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">2.5.3&#160;&#160;&#160;&#160;DAC Meetings</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  During the Pre-Option Exercise Term, the DAC shall meet &#91;**&#93; (or more or less frequently as agreed by the Parties in writing).  At least &#91;**&#93; per year will be in-person, unless the Parties agree to meet by an alternative mechanism (</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">e.g.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, telephone or videoconference).  DAC meetings may be conducted by telephone, videoconference or in person.  Any in-person DAC meetings shall be held on an alternating basis between Mersana&#8217;s and GSK&#8217;s facilities, unless otherwise agreed by the Parties in writing.  Each Party shall be responsible for its own expenses in attending such meetings.  As appropriate, the DAC may invite a reasonable number of non-member employees, consultants, and scientific advisors to attend its meetings as observers&#59; provided that such invitees are bound by appropriate confidentiality obligations no less restrictive than those set forth in this Agreement.  The Alliance Managers shall provide the members of the DAC with no less than &#91;**&#93; notice of each regularly scheduled meeting.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">2.5.4&#160;&#160;&#160;&#160;Term of the DAC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The DAC shall meet in accordance with Section 2.5.3 (DAC Meetings) until the earlier of (a) if GSK does not exercise the Option pursuant to Section 3.8.1 (Exercise of Option) prior to the expiration of the Option Exercise Period, the expiration of the Option Exercise Period&#59; or (b) if GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), the formation of the JSC pursuant to Section 10.1.1 (Establishment of JSC).</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-32-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">2.6&#160;&#160;&#160;&#160;Initial Development Reporting</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Mersana shall, through the DAC in accordance with Section 2.1 (Initial Development Plan), keep GSK reasonably informed with respect to the Development and Manufacture of the Licensed Compound and Licensed Products in the Territory through the Pre-Option Exercise Term, including the conduct of activities under the Initial Development Plan.  In furtherance of the foregoing, during the Pre-Option Exercise Term, Mersana shall provide to GSK (through the DAC) updates regarding the conduct of the activities under the Initial Development Plan at least &#91;**&#93;, including (a) a summary of any currently planned material clinical and non-clinical activities by or on behalf of Mersana or any of its Affiliates with respect to any Licensed Products in the Territory&#59; (b) a progress update against the timelines set forth in the Initial Development Plan&#59; (c) summaries of all material Data and other material information (including material CMC information) generated during the period since the prior such update was delivered by Mersana to GSK pursuant to this Section 2.6 (Initial Development Reporting)&#59; and (d) an update of all material safety data and information (including all adverse events or serious adverse events) and identified safety signals or emerging safety issues, in each case ((a)-(d)), with respect to the Licensed Compound or any Licensed Product.  &#91;**&#93;.  </font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">2.7&#160;&#160;&#160;&#160;Existing Mersana Upstream Agreements</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">2.7.1&#160;&#160;&#160;&#160;Mersana &#91;**&#93; Agreement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  During the Pre-Option Exercise Term (but, in any event, prior to  the Option Data Package Delivery Date), Mersana shall (or shall cause its Affiliate to, as applicable) use Commercially Reasonable Efforts to &#91;**&#93; from &#91;**&#93; in order for Mersana to &#91;**&#93;.  Mersana shall promptly notify GSK in writing once the &#91;**&#93;.  Notwithstanding the foregoing, if Mersana is unable to &#91;**&#93; prior to the Option Data Package Delivery Date, then (a) Mersana shall provide written notice thereof to GSK&#59; (b) prior to the Option Data Package Delivery Date, Mersana shall (or shall cause its Affiliate to, as applicable) &#91;**&#93; and shall promptly notify GSK in writing once &#91;**&#93;&#59; (c) at the written request of GSK at any time thereafter Mersana shall (or shall cause its Affiliate to, as applicable) assign the Mersana &#91;**&#93; Agreement to GSK (or its Affiliate or designee)&#59; and (d) if GSK elects to have the Mersana &#91;**&#93; Agreement assigned to GSK (or its Affiliate or designee), (i) Mersana shall be solely responsible for, and shall indemnify and hold harmless GSK and all other GSK Indemnitees from and against any Losses asserted by a Third Party to the extent arising from (A) the Mersana &#91;**&#93; Agreement as a result of, or in connection with, events occurring or occurrences arising prior to the date of such assignment (including, for clarity, any payments that accrued prior to the date of such assignment, but which do not become payable until after the date of such assignment)&#59; or (B) events occurring or occurrences arising from any &#91;**&#93; for Mersana&#8217;s proprietary Antibody known as &#91;**&#93; (1) generated or otherwise developed under the Mersana &#91;**&#93; Agreement prior to assignment and (2) that is retained by or on behalf of Mersana or any of its Affiliates following the date of such assignment, including any storage or use thereof and (ii) GSK shall be solely responsible for, and shall indemnify and hold harmless Mersana and all other Mersana Indemnitees from and against any Losses asserted by a Third Party to the extent arising from the Mersana &#91;**&#93; Agreement as a result of, or in connection with, events occurring or occurrences arising after the date of such assignment (including, for clarity, any payments that accrued after the date of such assignment) but excluding any such Losses set forth in Section 2.7.1(d)(i)(B). </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-33-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">2.7.2&#160;&#160;&#160;&#160;Mersana &#91;**&#93; Agreement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Prior to the Option Data Package Delivery Date, Mersana shall (or shall cause its Affiliate to, as applicable) &#91;**&#93; the Mersana &#91;**&#93; Agreement in order to &#91;**&#93; of this Agreement&#59; provided that, &#91;**&#93;.</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ARTICLE 3<br>GSK OPTION</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.1&#160;&#160;&#160;&#160;Option</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  As of the Effective Date, subject to the terms and conditions of this Agreement, Mersana hereby grants to GSK the exclusive option to obtain the rights and licenses set forth in Article 4 (Licenses&#59; Exclusivity&#59; ROFN) (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Option</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.2&#160;&#160;&#160;&#160;Option Data Package</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.2.1&#160;&#160;&#160;&#160;Delivery of Option Data Package</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Without limiting or expanding Mersana&#8217;s obligations under Section 2.2.1 (General), promptly following the date (if any) on which Mersana has completed the activities under the Initial Development Plan required to generate a complete Option Data Package, Mersana will deliver to GSK the complete Option Data Package&#59; provided that Mersana shall notify GSK (which notification may be provided to GSK&#8217;s Alliance Manager by e-mail) at least &#91;**&#93; prior to the date (if any) on which Mersana reasonably expects to deliver the Option Data Package.   </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.2.2&#160;&#160;&#160;&#160;Review of Option Data Package</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If, during the Option Exercise Period, GSK reasonably determines with respect to an Option Data Package delivered pursuant to Section 3.2.1 (Delivery of Option Data Package) that Mersana has indicated is complete, that such Option Data Package does not include any of the Data, information or materials set forth on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 1.251</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, GSK may provide Mersana with a written notice of such deficiency, specifically identifying the relevant Data, information or materials that have not been included in such Option Data Package.  Following receipt of any such notice, Mersana shall provide such Data, information or materials to GSK as soon as reasonably practicable, and the Option Exercise Period will be tolled until all such missing Data, information or materials with respect to such Option Data Package has been delivered to GSK in accordance with this Section 3.2 (Option Data Package).  If the Parties do not agree upon whether Mersana has delivered a complete Option Data Package as required under Section 3.2.1 (Delivery of Option Data Package), then either Party shall have the right to refer the matter to be resolved by the Senior Executives pursuant to Section 18.2 (Escalation to Senior Executives)&#59; provided, however, that, with respect to any such Dispute, notwithstanding Article 18 (Dispute Resolution), (i) the Senior Executives shall have only &#91;**&#93; following the date on which such Dispute was first referred to the Senior Executives to reach resolution on such Dispute&#59; and (ii) if the Senior Executives are unable for any reason to resolve such Dispute prior to the expiration of such &#91;**&#93; period, then the Parties shall submit such Dispute to be determined by binding arbitration conducted pursuant to Section&#160;3.2.3 (Expedited Dispute Resolution).  </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.2.3&#160;&#160;&#160;&#160;Expedited Dispute Resolution</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If the determination of whether Mersana has delivered a complete Option Data Package as required under Section 3.2.1 (Delivery of Option Data Package) is not resolved by the Senior Executives within the &#91;**&#93; period as set forth in Section 3.2.2 (Review of Option Data Package), then such Dispute shall be escalated for final resolution by binding arbitration in accordance with this Section 3.2.3 (Expedited Dispute </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-34-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Resolution).  The Parties shall mutually select a single arbitrator, which arbitrator shall be an independent expert with relevant subject matter expertise in the pharmaceutical or biotechnology industry, reasonably acceptable to both Parties&#59; provided that, if the Parties are unable to agree on a single arbitrator, the arbitrator shall be an independent expert as described in the preceding sentence selected by the chief executive of the New York office of the American Arbitration Association.  Following selection of the arbitrator, each Party shall prepare and submit to such arbitrator a written report setting forth its position with respect to the substance of such Dispute.  Such arbitration shall be conducted in all respects under the AAA Rules and the Parties shall use diligent efforts to cause the completion of any such arbitration within &#91;**&#93; following appointment of the arbitrator.  The costs of any arbitration under this Section 3.2.3 (Expedited Dispute Resolution) shall be shared equally by the Parties, and each Party shall bear its own expenses in connection with such arbitration.  The determination of the arbitrator as to the resolution of such Dispute shall be binding and conclusive upon the Parties, absent manifest error.  The Option Exercise Period will be tolled pending final resolution of such Dispute&#59; provided that, if the arbitrator rules in GSK&#8217;s favor, then Mersana will deliver to GSK the missing portions of the Option Data Package as identified by the arbitrator &#91;**&#93;.  If the arbitrator rules in Mersana&#8217;s favor and GSK subsequently exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, following the License Effective Date, with respect to Mersana&#8217;s performance of any ongoing Development activities with respect to the Licensed Compound and Licensed Products in the Territory during the pendency of such Dispute, solely to the extent that such Development activities were contemplated under the then-current Initial Development Plan, (a) such ongoing Development activities shall be deemed Shared Global Development Activities for purpose of this Agreement&#59; and (b) the reasonable Development FTE Costs, Out-of-Pocket Costs and Manufacturing Costs incurred by Mersana or its Affiliates during the pendency of the Dispute in the performance of such ongoing Development activities shall be included as Development Costs and shared by the Parties in accordance with Section 5.2.4 (Shared Development Costs), in each case, solely to the extent that such Out-Of-Pocket Costs, Development FTE Costs and Manufacturing Costs are (i) directly attributable and reasonably allocable to the conduct of such ongoing Development activities that were conducted during the pendency of the Dispute and (ii) incurred in connection with the conduct of such ongoing Development activities in a manner consistent with the estimate of such costs as provided by Mersana in the Option Data Package.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.3&#160;&#160;&#160;&#160;Information Rights During Option Exercise Period</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.3.1&#160;&#160;&#160;&#160;Option Diligence Data</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Mersana shall (a) on the Option Data Package Delivery Date, disclose to GSK, or make available to GSK by granting to GSK designated personnel access to a virtual data room containing, any Data and other information in Mersana&#8217;s Control and possession (or reasonably available to Mersana) that was generated under the Initial Development Plan that is described on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 3.3.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> (in addition to that required under the Option Data Package), without requiring Mersana (or any of its Affiliates) to perform any additional research or material scientific analysis (for clarity, other than any analysis expressly set forth on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 3.3.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">) (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Option Diligence Data</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;)&#59; and (b) as reasonably requested by GSK, during the Option </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-35-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Exercise Period, provide GSK with reasonable consultation and assistance to the extent necessary or reasonably useful for GSK to understand and conduct diligence on the Option Data Package and Option Diligence Data in a manner and on such timelines to enable GSK to make an informed and timely decision in respect of the Option, to the extent that answers thereto are known to Mersana at the time of the query. In addition, until the end of the Option Exercise Period, (i) upon GSK&#8217;s reasonable request, Mersana shall provide supplemental material Data or information that is related to the Licensed Compound or any Licensed Product or to GSK assessing whether to exercise the Option, including raw or source Data used in the completion of any reports delivered to the DAC pursuant to Section 2.5 (Development Advisory Committee), the Option Data Package or the Option Diligence Data, in each case, to the extent that such Data or information is in Mersana&#8217;s Control and possession (or reasonably available to Mersana) and without requiring Mersana (or any of its Affiliates) to perform any additional research or material scientific analysis&#59; and (ii) Mersana shall provide to GSK any material safety or efficacy Data and information (including with respect to any adverse events or serious adverse events) and identified safety signals or emerging safety issues to the extent that such Data and information is in Mersana&#8217;s Control and possession (or reasonably available to Mersana) and has not previously been provided to GSK. Upon GSK&#8217;s reasonable request, Mersana agrees to &#91;**&#93; with GSK to discuss any follow-up concerns, to be scheduled at a mutually agreeable date and time.  For further clarity, the provision of such additional Data or information or reasonable assistance and consultation will not extend the Option Exercise Period.  </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.3.2&#160;&#160;&#160;&#160;Technology Transfer Planning</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Within &#91;**&#93; following the Option Data Package Delivery Date, the Parties shall meet to begin discussing in good faith preliminary matters related to the Manufacturing Tech Transfer Plan contemplated to be developed pursuant to Section 7.3.1 (Manufacturing Tech Transfer Plan) following the Option Exercise Date if GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.4&#160;&#160;&#160;&#160;Limitations Based on Patient Safety</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If Mersana reasonably determines in good faith that the generation of any required Data, information or materials set forth on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 1.251</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> (a) would be &#91;**&#93;, or would otherwise not &#91;**&#93; or (b) is not &#91;**&#93; with respect to the generation of such required Data, information or materials set forth on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 1.251</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> such that it would be incompatible with the &#91;**&#93;, then Mersana shall so notify GSK in writing (which written notice shall include reasonable evidence documenting such &#91;**&#93;).  Following receipt of such notice, the Parties (through the DAC) shall meet and discuss in good faith whether such &#91;**&#93; can be reasonably addressed or whether any amendments to the Initial Development Plan or </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 1.251</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> could address such &#91;**&#93;&#59; provided that, for clarity, (i) in no event shall Mersana be required to perform any activities that would be &#91;**&#93;, or would otherwise not &#91;**&#93; or would create any &#91;**&#93;, (ii) any amendment to the Initial Development Plan shall be subject to compliance with the terms of Section 2.1 (Initial Development Plan) and (iii) any amendment to </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 1.251</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> shall only be effective upon mutual agreement by the Parties (such agreement not to be unreasonably withheld, conditioned or delayed).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.5&#160;&#160;&#160;&#160;Inability of Mersana to Deliver Option Data Package</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  During the Pre-Option Exercise Term, if, despite Mersana&#8217;s exercise of Commercially Reasonable Efforts to (a) perform the activities set forth in the then-current Initial Development Plan that are necessary to generate the Option Data Package in accordance with the timelines set forth </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-36-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">therein&#59; and (b) deliver a complete Option Data Package to GSK in accordance with Section 3.2 (Option Data Package) (the obligations set forth in clauses (a) and (b), the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana ODP Diligence Obligations</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), Mersana is not able to (or either Party has a good faith belief that Mersana will not be able to) deliver a complete Option Data Package to GSK on or prior to the date that is &#91;**&#93; after the Effective Date (or such later time as may be mutually agreed by the Parties) (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Option Data Package Outside Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), then the following provisions will apply&#58;</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.5.1&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">During the period beginning on the date that is &#91;**&#93; after the Effective Date and continuing until the earlier of (a) the date on which Mersana has delivered a complete Option Data Package to GSK in accordance with Section 3.2 (Option Data Package)&#59; or (b) the Option Data Package Outside Date, as applicable, if either Party has a good faith belief that Mersana will not be able to deliver a complete Option Data Package to GSK on or prior to the Option Data Package Outside Date in accordance with Section 3.2 (Option Data Package), then such Party may notify the other Party of such belief and, thereafter, both Parties shall use good faith efforts to discuss such anticipated failure through the DAC and mutually agree on a path forward, including any reasonable modifications to the Initial Development Plan or </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 1.251</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> that are necessary to make such delivery of a complete Option Data Package possible through the continued performance by Mersana of the Mersana ODP Diligence Obligations in accordance with Article 2 (Initial Development Plan&#59; Pre-Option Exercise Term)&#59; provided that, for clarity, (i) such modifications shall preserve the scope of the Initial Development Plan to the extent reasonably possible, it being understood that the timeline for completion of the Initial Development Plan and delivery of the Option Data Package may be affected&#59; (ii) any amendment to the Initial Development Plan shall be made in accordance with Section 2.1 (Initial Development Plan)&#59; (iii) any amendment to </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 1.251</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> shall only be effective upon mutual agreement by the Parties (such agreement not to be unreasonably withheld, conditioned or delayed)&#59; and (iv) Mersana&#8217;s obligations under Article 2 (Initial Development Plan&#59; Pre-Option Exercise Term), including the Mersana ODP Diligence Obligations, shall continue for the remainder of the Pre-Option Exercise Term in accordance with the terms of this Agreement.  </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.5.2&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Without limiting Section 3.2.1 (Delivery of Option Data Package), on the Option Data Package Outside Date, if Mersana has not already delivered to GSK a complete Option Data Package in accordance with Section 3.2 (Option Data Package), then&#58; </font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;if Mersana has completed all of the activities under the Initial Development Plan required to generate a complete Option Data Package, Mersana shall deliver to GSK the complete Option Data Package, together with a notice that the Option Data Package is complete, in which case, such Option Data Package shall be deemed to have been delivered pursuant to Section 3.2.1 (Delivery of Option Data Package) and, for clarity, the provisions of Section 3.2.2 (Review of Option Data Package) and Section 3.2.3 (Expedited Dispute Resolution), as applicable, shall apply with respect to such Option Data Package&#59; or </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-37-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;if Mersana has not completed all of the activities under the Initial Development Plan required to generate a complete Option Data Package&#58; </font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(1)&#160;&#160;&#160;&#160;Mersana shall deliver to GSK (A) a partial Option Data Package comprising all Data, information and materials set forth on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 1.251</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, in each case, to the extent such Data, information and materials are existing and available to Mersana (in whatever form then existing) as of the Option Data Package Outside Date&#59; and (B) a written statement identifying any Data, information or materials set forth on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 1.251</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> that is not included in such partial Option Data Package delivered by Mersana pursuant to this Section 3.5.2(b)(1) and explaining why such Data, information or materials were not provided to GSK in such partial Option Data Package&#59; provided that, if GSK reasonably determines that, with respect to any portion of such partial Option Data Package delivered pursuant to this Section 3.5.2(b)(1) that Mersana has indicated is complete, any relevant Data, information or materials set forth on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 1.251</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> with respect to such portion has not been included in such partial Option Data Package, then GSK may provide Mersana with a written notice of such deficiency, specifically identifying the relevant Data, information or materials that have not been included in such partial Option Data Package and, following receipt of any such notice, to the extent that such Data, information or materials are existing and available to Mersana (in whatever form then existing) as of the date of such request, Mersana shall provide such Data, information or materials to GSK as soon as reasonably practicable, as applicable&#59; and </font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(2)&#160;&#160;&#160;&#160;the provisions of Section&#160;3.7 (Remediation Plan) shall apply.     </font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.6&#160;&#160;&#160;&#160;Material Breach of Mersana ODP Diligence Obligations</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If, during the Pre-Option Exercise Term but prior to Mersana&#8217;s delivery of a complete Option Data Package in accordance with Section 3.2 (Option Data Package), Mersana materially breaches all or substantially all of the Mersana ODP Diligence Obligations, then GSK may deliver notice of such material breach to Mersana.  If Mersana does not dispute that it has committed such material breach (or, if Mersana disputes the existence of such material breach but, following the application of the dispute resolution procedures in accordance with Article 18 (Dispute Resolution), Mersana is finally determined to be in material breach of the Mersana ODP Diligence Obligations, as applicable) then, if Mersana fails to cure such material breach within &#91;**&#93; following receipt of the default notice or resolution of such dispute resolution procedures, as applicable (provided that, if such cure cannot reasonably be achieved within such &#91;**&#93; period, then, if Mersana provides GSK with a cure plan that is reasonably acceptable to GSK and diligently executes such plan, such &#91;**&#93; period shall be automatically extended for up to an additional &#91;**&#93;), the following provisions will apply&#58;  </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.6.1&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">without limiting Section 3.2.1 (Delivery of Option Data Package), upon GSK&#8217;s request, Mersana shall (a) deliver to GSK a partial Option Data Package comprising all Data, information and materials set forth on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 1.251</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, in each case, to the extent that such Data, information and materials are </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-38-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">existing and available to Mersana (in whatever form then existing) as of the date of such request&#59; and (b) a written statement identifying any Data, information or materials set forth on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 1.251</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> that is not included in such partial Option Data Package delivered by Mersana pursuant to this Section 3.6.1 and explaining why such Data, information or materials were not provided to GSK in such partial Option Data Package&#59; provided that, if GSK reasonably determines that, with respect to any portion of such partial Option Data Package delivered pursuant to this Section 3.6.1 that Mersana has indicated is complete, any relevant Data, information or materials set forth on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 1.251</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> with respect to such portion has not been included in such partial Option Data Package, then GSK may provide Mersana with a written notice of such deficiency, specifically identifying the relevant Data, information or materials that have not been included in such partial Option Data Package and, following receipt of any such notice, to the extent that such Data, information or materials are existing and available to Mersana (in whatever form then existing) as of the date of such request, Mersana shall provide such Data, information or materials to GSK as soon as reasonably practicable, as applicable&#59; </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.6.2&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">the provisions of Section&#160;3.7 (Remediation Plan) shall apply&#59; and </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.6.3&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">solely in the event that GSK subsequently exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), prior to applying any deductions to the Option Exercise Fee applicable pursuant to Section 3.7.4, the Option Exercise Fee shall be reduced by &#91;**&#93; percent (&#91;**&#93;%)&#59; provided that, in such case, GSK agrees that the &#91;**&#93; this Section 3.6 (Material Breach of Mersana ODP Diligence Obligations) shall be &#91;**&#93; by Mersana of its obligations to (a) perform the activities set forth in the Initial Development Plan (past or present), or any activities that Mersana agrees to undertake in accordance with Section 3.7.2, or (b) deliver an Option Data Package to GSK&#59; provided, however, it being understood that, to the extent applicable, the foregoing shall not limit or otherwise affect (i) Mersana&#8217;s indemnification obligations under Section 15.1 (Indemnification) (even with respect to Losses asserted by a Third Party arising from any breach of Mersana&#8217;s obligations described in Section 3.6.3(a) and Section 3.6.3(b) above, or (ii) any remedies available to GSK under law or equity with respect to any breach of Mersana&#8217;s obligations under this Agreement, including under Section 2.2.2 (No Outside Exploitation), Section 2.3 (Subcontracting), Section 2.4 (Compliance), Section 4.5 (Exclusivity), Article 12 (Confidentiality&#59; Publications and Presentations) or Article 14 (Representations and Warranties and Covenants), other than with respect to any breach of Mersana&#8217;s obligations described in Section 3.6.3(a) and Section 3.6.3(b) above, including (if applicable) pursuant to Section 16.7 (Certain Additional Remedies of GSK in Lieu of Termination) and all other applicable contract remedies.  </font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.7&#160;&#160;&#160;&#160;Remediation Plan</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.7.1&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">During the Pre-Option Exercise Period, if (a) Mersana delivers to GSK a partial Option Data Package pursuant to Section 3.5.2(b)(1), then, within &#91;**&#93; following GSK&#8217;s receipt of such partial Option Data Package&#59; or (b) if Mersana fails to cure a material breach of the Mersana ODP Diligence Obligations within the applicable cure period in accordance with Section 3.6 (Material Breach of Mersana ODP Diligence Obligations), then, within &#91;**&#93; </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-39-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">after the expiration of such cure period, in each case ((a) or (b)), GSK shall have the right to specify a remediation plan (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Remediation Plan</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) directed to any activities required to generate any Data, information or materials that are required to be included in the Option Data Package pursuant to </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule&#160;1.251</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> and have not been provided to GSK as part of a partial Option Data Package delivered pursuant to Section 3.5.2(b)(1) or Section 3.6.1, as applicable (such required activities, the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Remediation Activities</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.7.2&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">As between the Parties, GSK shall have the right to conduct all Remediation Activities under the Remediation Plan (and, for clarity, GSK shall not have the right to require Mersana to conduct any Remediation Activities)&#59; provided, however, that, in addition to the Remediation Plan, upon GSK&#8217;s request, the Parties shall discuss in good faith (via the DAC) and, as appropriate, mutually agree on a path forward, including any reasonable modifications to the Initial Development Plan or </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 1.251</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, in each case, as may be necessary to complete any activities required to generate any such missing Data, information or materials that are required to be included in the Option Data Package and deliver a complete Option Data Package to GSK pursuant to Section 3.2 (Option Data Package)&#59; provided that, for clarity, (a) any amendment to the Initial Development Plan shall be subject to compliance with the terms of Section 2.1 (Initial Development Plan) (provided that, (1) if GSK reasonably requests an amendment to the Initial Development Plan, to the extent necessary to complete any activities required to generate any such missing Data, information or materials that are required to be included in the Option Data Package and deliver a complete Option Data Package to GSK pursuant to Section 3.2 (Option Data Package), Mersana shall not unreasonably withhold, condition or delay its approval of such amendment, and (2) to the extent that GSK has included a Remediation Activity under the Remediation Plan, unless otherwise mutually agreed by the Parties, such activity shall be removed from the Initial Development Plan)&#59; (b) any amendment to </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 1.251</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> shall only be effective upon mutual agreement by the Parties (such agreement not to be unreasonably withheld, conditioned or delayed)&#59; (c) to the extent that GSK has agreed to conduct any Remediation Activities under the Remediation Plan, GSK shall use Commercially Reasonable Efforts to perform such Remediation Activities in accordance with such Remediation Plan&#59; and (d) Mersana&#8217;s obligations under Article 2 (Initial Development Plan&#59; Pre-Option Exercise Term), including the Mersana ODP Diligence Obligations, shall continue for the remainder of the Pre-Option Exercise Term in accordance with the terms of this Agreement.  </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.7.3&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Effective as of the date on which GSK specifies a Remediation Plan pursuant to Section 3.7.1&#58; </font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;Mersana or its Affiliates shall grant, and hereby do grant, to GSK a non-exclusive, royalty-free, fully-paid up, worldwide license under the Mersana Technology (with the right to grant sublicenses (including through multiple tiers) to Third Party subcontractors performing on behalf of GSK or any of its Affiliates) solely to the extent necessary to perform the Remediation Activities under the Remediation Plan&#59; and </font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;Mersana shall, &#91;**&#93; the Remediation Activities under the Remediation Plan, which &#91;**&#93;, and (ii) &#91;**&#93; such Remediation Activities.  </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-40-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.7.4&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Subject to Section 3.7.3(b), GSK would bear its own costs of performing the Remediation Activities&#59; provided, however, that, if GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), without limiting Section 3.6.3 (as applicable), the Option Exercise Fee shall be automatically reduced by an amount equal to &#91;**&#93; percent (&#91;**&#93;%) of the costs incurred by or on behalf of GSK or its Affiliates in connection with the performance of the Remediation Activities under the Remediation Plan prior to exercise of the Option (which costs are of the kind included in the definition of Development Costs). </font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.8&#160;&#160;&#160;&#160;Exercise of Option and License Effective Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.8.1&#160;&#160;&#160;&#160;Exercise of Option</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  GSK shall have the right to exercise the Option at any time during the Option Exercise Period by delivering to Mersana written notice of such exercise (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Option Exercise Notice</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; and the date of such notice, the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Option Exercise Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;). For purposes of this Agreement, &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Option Exercise Period</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; has the following meaning&#58;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;if Mersana provides GSK with a complete Option Data Package pursuant to Section 3.2 (Option Data Package) prior to the Option Data Package Outside Date, then &#8220;Option Exercise Period&#8221; means the period (i) beginning on the Option Data Package Delivery Date and (ii) ending on the earliest of (A) the date that is &#91;**&#93; following the Option Data Package Delivery Date&#59; (B) the Option Exercise Date&#59; or (C) the date on which GSK notifies Mersana that GSK will not be exercising the Option&#59; or </font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;if Mersana does not provide GSK with a complete Option Data Package pursuant to Section 3.2 (Option Data Package) prior to the Option Data Package Outside Date, then, subject to Section 3.8.1(c), &#8220;Option Exercise Period&#8221; means the period (i) beginning on the Option Data Package Outside Date and (ii) ending on the earliest of (A) the date that is &#91;**&#93; following the Remediation Plan Outside Date described in Section 1.313(a)&#59; (B) the Option Exercise Date&#59; or (C) the date on which GSK notifies Mersana that GSK will not be exercising the Option&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;notwithstanding Section 3.8.1(a) or Section 3.8.1(b), as applicable, if Mersana has materially breached all or substantially all of the Mersana ODP Diligence Obligations, then &#8220;Option Exercise Period&#8221; means the period (i) beginning on the later of (A) the expiration of the applicable cure period with respect to such material breach pursuant to Section 3.6 (Material Breach of Mersana ODP Diligence Obligations)&#59; or (B) the date that is &#91;**&#93; following the Effective Date&#59; and (ii) ending on the earliest of (A) the date that is &#91;**&#93; following the Remediation Plan Outside Date described in Section 1.313(b)&#59; (B) the Option Exercise Date&#59; or (C) the date on which GSK notifies Mersana that GSK will not be exercising the Option. </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.8.2&#160;&#160;&#160;&#160;Antitrust Filings</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to Section 16.6 (Termination for Lack of Antitrust Clearance), if (a) GSK reasonably determines that the transactions to occur upon consummation of the exercise of the Option in accordance with Section 3.8.1 (Exercise of Option) would require the filing of appropriate notices </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-41-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">under the HSR Act (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">HSR Filings</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) or similar notices or filings under Applicable Laws in any other jurisdiction (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Other Antitrust Filings</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;)&#59; and (b) GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, on or prior to GSK&#8217;s exercise of the Option pursuant to Section 3.8.1 (Exercise of Option), (x) GSK shall provide notice of its determination to file such HSR Filings or Other Antitrust Filings, as applicable, to Mersana (to the extent GSK has not already done so)&#59; and (y) the Parties shall comply with the terms of this Section 3.8.2 (Antitrust Filings).  If required, both Parties (or their Affiliates) shall file the appropriate HSR Filings under the HSR Act within &#91;**&#93; Business Days following the Option Exercise Date and shall file any Other Antitrust Filings as soon as reasonably practicable following the Option Exercise Date.  The Parties shall keep each other apprised of the status of any communications with, and any inquiries or requests for additional information from, the United States&#8217; Federal Trade Commission (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">FTC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), the Antitrust Division of the United States Department of Justice (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">DOJ</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) and any other Governmental Authority with which an Other Antitrust Filing is made and shall comply promptly with any reasonable FTC, DOJ or other Governmental Authority inquiry or request of this nature&#59; provided that neither Party shall be required to consent to the divestiture or other disposition of any of its assets (or the assets of its Affiliates) or to consent to any other structural or conduct remedy, and each Party and its Affiliates shall have no obligation to contest, administratively or in court, any ruling, order or other action of the FTC, DOJ, other Governmental Authority or any Third Party with respect to the transactions contemplated by this Agreement.  Each Party shall be responsible for paying any legal costs that it incurs in connection with the HSR Filings or any Other Antitrust Filings, as applicable, and GSK will be responsible for paying all filing fees in connection with the HSR Filings and any Other Antitrust Filings. </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.8.3&#160;&#160;&#160;&#160;Updates by Mersana</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Mersana represents and warrants that each of the representations and warranties of Mersana set forth in Article 14 (Representations, Warranties and Covenants) shall be true and correct as of the Option Exercise Date and the License Effective Date as though made as of the Option Exercise Date and the License Effective Date&#59; provided, however, that, if, between the Effective Date and the License Effective Date, Mersana becomes aware that any of the applicable representations and warranties of Mersana set forth in Article 14 (Representations, Warranties and Covenants) was not true and correct as of the Effective Date, or any event occurs or circumstance arises of which Mersana becomes aware which results in any of the applicable representations and warranties of Mersana set forth in in Article 14 (Representations, Warranties and Covenants) being not true and correct as of the Option Exercise Date or the License Effective Date, then&#58;  </font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;if any such event or circumstance requires any amendment or supplement to the Mersana disclosure schedules with respect to Mersana&#8217;s applicable representations and warranties set forth in Section&#160;14.2 (Additional Representations, Warranties and Covenants of Mersana) as set forth on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 14.2</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Disclosure Schedule</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), then, (i) on the Option Data Package Delivery Date, together with the Option Data Package, (ii) on the earlier of the date that is &#91;**&#93; prior to the expiration of the Option Exercise Period or within &#91;**&#93; of GSK&#8217;s written request at any time during the Option Exercise Period, or (iii) if GSK exercised the Option, on or prior to the </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-42-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">License Effective Date, Mersana shall deliver to GSK a written statement including any amendments or supplements to the Mersana Disclosure Schedule specifying such change&#59; and</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;any amendments or supplements to the Mersana Disclosure Schedule delivered pursuant to this Section 3.8.3 (Updates by Mersana) shall operate as a disclosure pursuant to the Mersana Disclosure Schedule and Mersana&#8217;s applicable representations and warranties set forth in Section&#160;14.2 (Additional Representations, Warranties and Covenants of Mersana) shall be deemed to have been so amended and modified (i) in the case of any such amendments or supplements provided prior to the Option Exercise Date, solely with respect to any such event or circumstance which first arose after the Effective Date (or, with respect to any representation or warranty that is qualified as to the Knowledge of Mersana, of which Mersana first obtained Knowledge after the Effective Date) and (ii) in the case of any such amendments or supplements provided following the Option Exercise Date, solely with respect to any such event or circumstance which first arose after the Option Exercise Date (or, with respect to any representation or warranty that is qualified as to the Knowledge of Mersana, of which Mersana first obtained Knowledge after the Option Exercise Date)&#59; provided that no such disclosure, notice, amendment or supplement with respect to any representation, warranty or covenant of Mersana under Section&#160;14.2 (Additional Representations, Warranties and Covenants of Mersana) that was untrue or breached as of the Effective Date or the Option Exercise Date shall limit or otherwise affect any remedies available to GSK with respect to such breach of such representation, warranty or covenant or prevent or cure any misrepresentations, breach of warranty or breach of covenants hereunder. </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">3.8.4&#160;&#160;&#160;&#160;License Effective Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, subject to Section 16.6 (Termination for Lack of Antitrust Clearance), Mersana shall be deemed to have granted to GSK the rights and licenses set forth in Article 4 (Licenses&#59; Exclusivity&#59; ROFN) on the Clearance Date (such date, the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">License Effective Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ARTICLE 4<br>LICENSES&#59; EXCLUSIVITY&#59; ROFN</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">4.1&#160;&#160;&#160;&#160;License Grant to GSK</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">4.1.1&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Subject to the terms and conditions of this Agreement, if GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, effective as of the License Effective Date, Mersana or its Affiliates hereby grant to GSK, a royalty-bearing, sublicensable through multiple tiers (subject to Section 4.3 (Sublicenses)), exclusive (even as to Mersana and its Affiliates, but subject to the Mersana Retained Rights) license under the Mersana Technology to make, have made, use, sell, offer for sale, import, Develop, Manufacture, Commercialize and otherwise Exploit the Licensed Compound and the Licensed Products in the Field in the Territory.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-43-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">4.1.2&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Subject to the terms and conditions of this Agreement, if GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), Mersana hereby grants to GSK a non-exclusive, royalty-free, worldwide, perpetual, irrevocable, freely sublicensable (through multiple tiers), freely transferrable license under all Assigned Platform-Specific Arising Technology assigned by GSK to Mersana pursuant to Section 13.1.4 (Mersana Arising Technology) for any and all purposes, including to Exploit any compound or product.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">4.1.3&#160;&#160;&#160;&#160;Existing Mersana Upstream Agreements</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  </font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;The Parties acknowledge and agree that the sublicenses granted by Mersana to GSK pursuant to Section 4.1 (License Grant to GSK) under certain Mersana Technology that is not owned by Mersana or its Affiliates are subject to the limitations, obligations, and reservations imposed on sublicensees of Mersana or its Affiliates pursuant to the applicable Existing Mersana Upstream Agreements, in each case, solely to the extent set forth in this Section 4.1.3 (Existing Mersana Upstream Agreements).   Without limiting the provisions of Section 13.6.2 (New Mersana Upstream Agreements) applicable to New Mersana Upstream Agreements, GSK agrees to be bound by the applicable terms and conditions of the Mersana &#91;**&#93; Agreement to the extent set forth in Section 4.1.3(b) and the Mersana &#91;**&#93; Agreement to the extent set forth in Section 4.1.3(c).  </font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;Subject to any amendment to the Mersana &#91;**&#93; Agreement entered into by Mersana pursuant to Section 2.7.2,  GSK agrees to be bound by the following terms and conditions of the Mersana &#91;**&#93; Agreement to the extent applicable to GSK as a Licensee of Mersana thereunder or to the Licensed Product (provided that GSK shall only be responsible for the payments under the Mersana &#91;**&#93; Agreement set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 11.8.1(A)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> of this Agreement)&#58; &#91;**&#93;.  </font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;Subject to the &#91;**&#93; if and when obtained by Mersana pursuant to Section 2.7.1,  GSK agrees to be bound by the following terms and conditions of the Mersana &#91;**&#93; Agreement to the extent applicable to GSK as a &#91;**&#93; or as a &#91;**&#93; of Mersana thereunder or to the Licensed Product (provided that GSK shall only be responsible for the payments under the Mersana &#91;**&#93; Agreement set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 11.8.1(B)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> of this Agreement)&#58;  &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">4.2&#160;&#160;&#160;&#160;License Grant to Mersana</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to the terms and conditions of this Agreement, if GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, effective as of the License Effective Date, GSK or its Affiliates hereby grant to Mersana a non-exclusive, royalty-free, worldwide license under the GSK Technology (with the right to grant sublicenses solely to Third Party subcontractors in accordance with Section 5.2.3 (Performance of Shared Global Development Activities)) as necessary to (a) perform its obligations with respect to the Development of the Licensed Compound and Licensed Products allocated to Mersana under and in accordance with the then-current Joint Development Plan&#59; (b) Manufacture the Licensed Compound and any Licensed Products for the benefit of GSK as specifically required pursuant to and in accordance with Article 7 (Manufacturing and Supply)&#59; and (c) if Mersana exercises its Co-Promotion Right pursuant to Section 9.2.1 (Exercise of Co-</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-44-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Promotion Right), perform its obligations in accordance with the then-current Detailing Plan during the Co-Promotion Term, in each case ((a) through (c)) in accordance with the terms and conditions of this Agreement.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">4.3&#160;&#160;&#160;&#160;Sublicensing</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  GSK shall have the right to grant sublicenses, through multiple tiers of sublicensees, of the license granted to GSK by Mersana under Section 4.1 (License Grant to GSK) to its Affiliates and Third Parties (each, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Sublicensee</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;)&#59; provided that, prior to the expiration of the &#91;**&#93; and, if Mersana exercises the &#91;**&#93;, GSK may not, without the prior written consent of Mersana (such consent not to be unreasonably withheld, conditioned or delayed), grant a sublicense to a Third Party to Develop or Commercialize the Licensed Compound or any Licensed Product in the Shared Territory, except for customary sublicenses and subcontracts granted in the ordinary course of business in the Shared Territory (</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">e.g.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, sublicenses and subcontracts to CMOs, contract research organizations, distributors and other Third Parties performing services on behalf of GSK or any of its Affiliates).  Any and all sublicenses shall be in writing and shall require the Sublicensee to comply with the applicable terms and conditions of this Agreement. With respect to any such sublicense for which Mersana&#8217;s prior written consent is required pursuant to this Section 4.3 (Sublicensing), GSK shall provide Mersana with a copy of any such sublicense agreement with any Third Party within &#91;**&#93; following the execution of such sublicense agreement (which shall be GSK&#8217;s Confidential Information)&#59; except that any such copy may be reasonably redacted to remove any confidential, proprietary, or competitively sensitive information, as long as such redactions do not adversely affect Mersana&#8217;s ability to understand the scope of rights sublicensed or to confirm that such sublicense agreement complies with all applicable terms and conditions of this Agreement. With respect to any other such sublicense by GSK or any of its Affiliates to a Third Party for which GSK is not required to deliver a copy pursuant to this Section 4.3 (Sublicensing) (a) pursuant to which GSK grants such Third Party the right to &#91;**&#93; the Licensed Compound or any Licensed Product &#91;**&#93;, or (b) &#91;**&#93;, in each case ((a) or (b)), except for customary sublicenses and subcontracts granted in the ordinary course of business in such Major Market (</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">e.g.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, sublicenses and subcontracts to CMOs, contract research organizations, distributors and other Third Parties performing services on behalf of GSK or any of its Affiliates), GSK shall promptly deliver notice to Mersana identifying such Third Party, together with a brief summary of the scope of such sublicense grant.  GSK shall remain responsible for performance by its Sublicensees of all of its obligations to Mersana hereunder to the same extent as if such activities were conducted by GSK.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">4.4&#160;&#160;&#160;&#160;Retained Rights</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">4.4.1&#160;&#160;&#160;&#160;No Implied Licenses</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Each Party acknowledges that the licenses granted under this Article 4 (Licenses&#59; Exclusivity&#59; ROFN) are limited to the scope expressly granted, and all other rights to Patents and Know-How licensed hereunder are expressly reserved to the Party granting the license to such Patents or Know-How.  Nothing in this Agreement will be interpreted to grant a Party any rights under any intellectual property rights owned or Controlled by the other Party that are not expressly granted herein, whether by implication, estoppel, or otherwise.  Without limiting the foregoing, (a) Mersana expressly retains the Mersana Retained Rights and (b) notwithstanding anything to the contrary in this Agreement (including the definitions of &#8220;Combination Product&#8221; and &#8220;Licensed Product&#8221;), each Party hereby acknowledges and agrees that neither Party grants to the other Party any rights under any Patents or Know-How to Exploit any Other Component owned or controlled (through license or otherwise) by such Party.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-45-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">4.4.2&#160;&#160;&#160;&#160;Mersana Retained Rights</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Notwithstanding the exclusive licenses granted to GSK and its Affiliates pursuant to Section 4.1 (License Grant to GSK), Mersana reserves the right to (a) Develop the Licensed Compound and Licensed Products as set forth in the Joint Development Plan&#59; (b) Manufacture the Licensed Compound and Licensed Products as set forth in Article 7 (Manufacturing and Supply)&#59; and (c) if Mersana exercises its Co-Promotion Right pursuant to Section 9.2.1 (Mersana&#8217;s Co-Promotion Right), then, subject to Section 9.3 (Termination of Co-Promotion Rights), perform its obligations in accordance with the then-current Detailing Plan ((a) through (c), collectively, the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Retained Rights</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">4.5&#160;&#160;&#160;&#160;Exclusivity</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">4.5.1&#160;&#160;&#160;&#160;Mutual Exclusivity Covenant</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Except for (a) the conduct of activities as specifically permitted pursuant to and in accordance with this Agreement (including Section 4.5.2 (Limited Development Exception))&#59; or (b) as mutually agreed by the Parties pursuant to Section 4.7 (New Licensed Compound), during the period commencing on the Effective Date and ending &#91;**&#93;, neither Party nor any of such Party&#8217;s Affiliates shall, alone or with or for any Third Party, engage in, or obtain rights from a Third Party to engage in, the Development or Commercialization of &#91;**&#93; any compound or product that comprises or contains an ADC that is (i) conjugated (using any linker moiety) with a STING Agonist and (ii) directed to HER2 (each, &#91;**&#93;, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Competing Product</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">4.5.2&#160;&#160;&#160;&#160;Limited Development Exception</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Notwithstanding Section 4.5.1 (Mutual Exclusivity Covenant), (a) if, &#91;**&#93;&#59; (b) use of a Competing Product owned or controlled by a Third Party for use as a comparator or standard of care in a Clinical Trial of the Licensed Product solely for the purposes of conducting the Collaboration will not constitute a breach by such Party of its exclusivity obligations set forth in Section 4.5.1 (Mutual Exclusivity Covenant)&#59; (c) use, or provision to a Third Party, of a Competing Product solely for use as a comparator, reference, or control will not constitute a breach by such Party of its exclusivity obligations set forth in Section 4.5.1 (Mutual Exclusivity Covenant)&#59; and (d) &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">4.5.3&#160;&#160;&#160;&#160;Change of Control Exception</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Notwithstanding Section 4.5.1 (Mutual Exclusivity Covenant), if (1) a Third Party becomes an Affiliate of a Party during the Term through merger, acquisition, consolidation, Change of Control, or other similar transaction (any such Third Party, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">New Affiliate</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) and (2) such New Affiliate, as of the execution date of the definitive agreement with respect to such transaction, is engaged in activities that, if conducted by such Party, would cause such Party to violate the exclusivity obligations set forth in Section 4.5.1 (Mutual Exclusivity Covenant) (such activities, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Competing Program</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), then such Party (or its successor, as applicable) shall provide the other Party with written notice of such transaction within &#91;**&#93; following the closing date of such transaction, and&#58;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;If such transaction results in a Change of Control of a Party, then such New Affiliate of such Party (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Acquiror</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) may continue to Develop and Commercialize products that are the subject of such Competing Program, and such Party will not be in violation of its exclusivity obligations set forth in Section 4.5.1 (Mutual Exclusivity </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-46-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Covenant), as long as (i) no Confidential Information of the other Party or GSK Technology (if the acquired Party is Mersana) or Mersana Technology (if the acquired Party is GSK) is used by or on behalf of such Party, its Acquiror or any of their respective Affiliates in connection with any activities conducted under such Competing Program, and (ii) such Party, its Acquiror and their respective Affiliates institute commercially reasonable technical and administrative safeguards to ensure the requirements set forth in the foregoing clause (i) are met, including by creating &#8220;firewalls&#8221; between (A) the personnel working under such Competing Program and (B) the personnel teams charged with working on the Licensed Compound or any Licensed Product hereunder or having access to data from activities performed under this Agreement or to the Confidential Information of the other Party.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;If such transaction does not result in a Change of Control of a Party, then, unless the Parties agree otherwise in writing, such Party and its New Affiliate (an &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Acquiree</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) will take one of the following actions set forth below in clauses (A) or (B) and, no later than &#91;**&#93; following the date of consummation of the relevant acquisition transaction, such Party will notify the other Party of which of the actions in the following clauses (A) or (B), it will pursue&#58;  (A) divest, or cause its Acquiree to divest, whether by license or otherwise, its interest in such Competing Program&#59; or (B) terminate any further activities with respect to such Competing Program.  If such Party notifies the other Party in writing that it intends to divest the applicable Competing Program or terminate the performance of the Competing Program, then such Party or its Acquiree will effect the consummation of such divestiture within &#91;**&#93; (or such other period as may be required to comply with Applicable Law), or effect such termination of the applicable Competing Program within &#91;**&#93;, in each case, following the closing of the relevant transaction and will confirm to the other Party in writing when it completes such divestiture pursuant to clause (A) or termination pursuant to clause (B).  Such Party will keep the other Party reasonably informed of its efforts and progress in effecting such divesture or termination until such Party or its Acquiree completes the same.  During such &#91;**&#93; or &#91;**&#93; period, as applicable, such Party and its Acquiree&#8217;s conduct of such Competing Program will not constitute a breach by such Party of its exclusivity obligations set forth in Section 4.5.1 (Mutual Exclusivity Covenant), as long as during such period, (X) no Confidential Information of the other Party or Mersana Technology (if the acquiring Party is GSK) or GSK Technology (if the acquiring Party is Mersana) is used by or on behalf of such acquiring Party, its Acquiree, or any of their respective Affiliates in connection with any activities conducted under such Competing Program, and (Y) such acquiring Party, its Acquiree and their respective Affiliates institute commercially reasonable technical and administrative safeguards to ensure the requirements set forth in the foregoing clause (X) are met, including by creating &#8220;firewalls&#8221; between (1) the personnel working under such Competing Program and (2) the personnel teams charged with working on the Licensed Compound or any Licensed Product hereunder or having access to data from </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-47-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">activities performed under this Agreement or Confidential Information of the other Party.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">4.6&#160;&#160;&#160;&#160;New HER2 ADC Right of First Negotiation</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">4.6.1&#160;&#160;&#160;&#160;Negotiation Notice</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  During the period commencing on the Effective Date and ending &#91;**&#93; following the first Marketing Approval of a Licensed Product in the Territory, except in connection with a Change of Control of Mersana, Mersana (and any of its Affiliates) shall neither license nor otherwise grant to any Third Party, nor engage in any negotiations with any Third Party regarding any agreement to license or otherwise grant to any Third Party, any rights to Develop or Commercialize any New HER2 ADC Product (each, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">New HER2 ADC Transaction</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) without first (a) notifying GSK in writing that Mersana intends to enter into a New HER2 ADC Transaction, which notice shall contain (i) a description of the New HER2 ADC Product proposed to be covered by such New HER2 ADC Transaction, and (ii) a confidential summary of the proposed New HER2 ADC Transaction (each, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Trigger Notice</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) and (b) if GSK provides Mersana with written notice (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Negotiation Notice</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) within &#91;**&#93; of its receipt of the Trigger Notice that GSK desires to negotiate with Mersana regarding such New HER2 ADC Transaction, then the Parties shall negotiate in accordance with Section 4.6.2 (ROFN Negotiation).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">4.6.2&#160;&#160;&#160;&#160;ROFN Negotiation</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK delivers a Negotiation Notice to Mersana during the applicable &#91;**&#93; period as set forth in Section 4.6.1 (Negotiation Notice), then, for a period of &#91;**&#93; following the date of the receipt by Mersana of such Negotiation Notice (or such shorter or longer time as may be mutually agreed in writing by the Parties) (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Negotiation Period</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), the Parties shall negotiate exclusively and in good faith and on commercially reasonable terms concerning such New HER2 ADC Transaction and Mersana shall cooperate and provide all information reasonably requested by GSK (or customary to provide in connection with such transactions) to enable GSK to evaluate any such New HER2 ADC Transaction&#59; provided, however, that (a) if (i) GSK does not deliver the Negotiation Notice prior to the expiration of the applicable &#91;**&#93; period as set forth in Section 4.6.1 (Negotiation Notice), (ii) at any time during such &#91;**&#93; period or the Negotiation Period, GSK notifies Mersana in writing that it does not wish to enter into such New HER2 ADC Transaction or (iii) the Parties do not execute a binding agreement with respect to such New HER2 ADC Product prior to the expiration of the Negotiation Period, as applicable, then, for a period of &#91;**&#93; thereafter, Mersana shall be permitted to (A) engage in discussions or negotiations with any Third Party regarding such New HER2 ADC Transaction and (B) enter into any agreement with any such Third Party with respect to such New HER2 ADC Transaction, with respect to such New HER2 ADC Transaction, in each case without any further obligations to GSK with respect thereto&#59; provided that the terms and conditions of such Third Party agreement, taken as a whole, are not more favorable to such Third Party than the terms and conditions offered to GSK in the Trigger Notice or during the Negotiation Period, as applicable.  Following the expiration of such &#91;**&#93; tail period, Mersana shall be permitted to enter into any agreement with any Third Party with respect to such New HER2 ADC Transaction and will not have any further obligations to GSK with respect thereto.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-48-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">4.7&#160;&#160;&#160;&#160;New Licensed Compounds</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  &#91;**&#93;.</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ARTICLE 5<br>DEVELOPMENT</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.1&#160;&#160;&#160;&#160;General</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises the Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, (a) during the Development Term, the Parties will collaborate on the conduct of Shared Global Development Activities and (b) during the Collaboration Term, as between the Parties, except as otherwise provided in this Agreement, including pursuant to Article&#160;7 (Manufacturing and Supply), Article 10 (Management of the Collaboration) and this Article 5 (Development), GSK shall otherwise have the exclusive right to conduct (directly or through any of its Affiliates, Sublicensees or subcontractors), and the sole responsibility for, the Development of the Licensed Compound or any Licensed Products throughout the Territory.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.2&#160;&#160;&#160;&#160;Shared Global Development Activities</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.2.1&#160;&#160;&#160;&#160;General</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to the terms of this Agreement, including this Section 5.2 (Shared Global Development Activities), the Parties shall jointly conduct all Shared Global Development Activities, through the completion of Pivotal Clinical Trials, as necessary to obtain and maintain Regulatory Approvals for such Licensed Products in the U.S. or the European Union, in each case in accordance with the then-current Joint Development Plan and otherwise in accordance with this Agreement (including this Section 5.2 (Shared Global Development Activities)).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.2.2&#160;&#160;&#160;&#160;Joint Development Plan</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;Promptly following the License Effective Date (but in any event within &#91;**&#93; following the License Effective Date), the JDC (in consultation with the Financial Working Group and the JMC, as applicable) shall prepare, discuss and agree on a written development plan with respect to the Shared Global Development Activities to be conducted by the Parties during the Development Term (such plan, as approved by the JSC pursuant to this Section 5.2.2 (Joint Development Plan), the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Joint Development Plan</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  Except for Independent Registration Studies, neither Party may (itself or with or through any of its Affiliates or any Third Party) conduct any Shared Global Development Activities except as set forth in the Joint Development Plan.  </font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;The Joint Development Plan will include&#58; (i) the Shared Global Development Activities to be performed by the Parties with respect to the Licensed Compound and Licensed Products in the Territory (provided that (A) &#91;**&#93;, (B) unless otherwise mutually agreed by the Parties via the JSC, Mersana shall be responsible for the conduct of any ongoing Clinical Trials that were being conducted under the Initial Development Plan prior to the License Effective Date and will continue to be conducted under the Joint Development Plan, (C) unless otherwise mutually agreed by the Parties via the JSC, it is expected that GSK will &#91;**&#93;, and (D) unless otherwise mutually agreed by the Parties via the JSC, Mersana will &#91;**&#93;&#59; (ii) the estimated timelines for the performance and completion of, and any applicable success criteria </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-49-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">or endpoints with respect to, the Shared Global Development Activities&#59; (iii) the regulatory strategy for obtaining and maintaining Regulatory Approval for Licensed Products in the U.S. and European Union&#59; and (iv) (A) activities required for the Manufacture and supply of the Licensed Compound, Licensed Products (or components thereof), comparator compounds, other therapeutically active compounds for Combination Studies or placebos, in each case, as required for the conduct of the Shared Global Development Activities and (B) any CMC Development activities for the Licensed Compound or Licensed Products (provided that the JDC shall consult with the JMC with respect any Manufacturing or supply components of the Joint Development Plan).</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;In addition, the Joint Development Plan shall also include, subject to Section 5.2.4 (Shared Development Costs), (i) a corresponding binding budget for &#91;**&#93; period &#91;**&#93;, which budget shall reflect the total estimated Development Costs anticipated to be incurred in the performance of such Shared Global Development Activities &#91;**&#93;, broken down by &#91;**&#93; (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Joint Development Budget</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) and (ii) a non-binding good faith forecasted budget for the &#91;**&#93; period following the &#91;**&#93;, setting forth the Development Costs expected to be incurred in connection with Shared Global Development Activities &#91;**&#93; period (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Joint Development Forecast</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  The JDC shall prepare, discuss and agree upon the initial Joint Development Budget and initial Joint Development Forecast (and each subsequent amendment or Update thereto proposed during the Development Term pursuant to Section 5.2.2(e)) in consultation with the Financial Working Group.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(d)&#160;&#160;&#160;&#160;The JDC shall submit its recommendation for the initial Joint Development Plan (including the corresponding Joint Development Budget and Joint Development Forecast), and each subsequent amendment or Update agreed by the JDC during the Development Term pursuant to Section 5.2.2(e), as applicable, to the JSC to review, discuss and determine whether to approve.  The initial Joint Development Plan (including the corresponding Joint Development Budget and Joint Development Forecast), and each subsequent amendment or Update thereto, shall only become effective upon approval thereof by the JSC.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(e)&#160;&#160;&#160;&#160;Following the JSC&#8217;s approval of the initial Joint Development Plan and corresponding Joint Development Budget and Joint Development Forecast pursuant to Section 5.2.2(d), subject to Section 5.3 (Mersana Opt-Out Right), during the remainder of the Development Term, at least &#91;**&#93;, consistent with GSK&#8217;s internal timelines and procedures for updating budgets, the JDC shall prepare, agree on and submit to the JSC to review, discuss and determine whether to approve, in accordance with Section 5.2.2(d), an Updated Joint Development Plan (including an Updated Joint Development Budget for the subsequent &#91;**&#93; and an Updated Joint Development Forecast for the &#91;**&#93; following such subsequent &#91;**&#93;).  Each Party shall also have the right to propose additional amendments to the Joint Development Plan (including any corresponding amendments to the Joint Development Budget or Joint Development Forecast), to the JDC for review and </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-50-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">discussion.  The JDC shall review and discuss (including in consultation with the JMC or Financial Working Group, as applicable), and to the extent applicable prepare, agree and submit its recommendation with respect to any such additional amendment to the JSC to review, discuss and determine whether to approve in accordance with Section 5.2.2(d).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.2.3&#160;&#160;&#160;&#160;Performance of Shared Global Development Activities</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;Without limiting the JDC&#8217;s rights to prepare, review and discuss, or the JSC&#8217;s rights to review, discuss and determine whether to approve, the initial Joint Development Plan and each amendment and Update thereto, the Party to whom a particular Shared Global Development Activity is allocated under the Joint Development Plan will have the right, without seeking JDC review or JSC approval, to make operational decisions with respect to the implementation and performance of such Shared Global Development Activity to the extent consistent with the then-current Joint Development Plan and Joint Development Budget and otherwise in accordance with the terms of this Agreement.  The Party to which a particular Shared Global Development Activity is allocated under the Joint Development Plan will lead the performance thereof.  Each Party will use Commercially Reasonable Efforts to perform the obligations assigned to it under the Joint Development Plan with respect to any Shared Global Development Activities.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;Notwithstanding anything to the contrary set forth herein, during the period following the Option Exercise Date but prior to approval of the initial Joint Development Plan pursuant to Section 5.2.2 (Joint Development Plan), (i) Mersana shall continue to perform any ongoing Development activities with respect to the Licensed Compound and Licensed Products in the Territory and, solely to the extent that such Development activities were contemplated under the then-current Initial Development Plan as of the Option Data Package Delivery Date and otherwise performed in accordance with the terms of this Agreement and (ii) if GSK is performing any Remediation Activities under a Remediation Plan, GSK may continue to perform any such ongoing Remediation Activities in accordance with the terms of this Agreement to the extent permitted by Applicable Law&#59; provided that, if the License Effective Date occurs, then (A) such ongoing Development activities or Remediation Activities, as applicable, shall be deemed Shared Global Development Activities for purpose of this Agreement and (B) the reasonable Out-Of-Pocket Costs, Development FTE Costs and Manufacturing Costs incurred by such Party or its Affiliates on and after the Option Exercise Date in the performance of such ongoing Development activities or Remediation Activities, as applicable, shall be included as Development Costs and shared by the Parties in accordance with Section 5.2.4 (Shared Development Costs), in each case, solely to the extent that such Out-Of-Pocket Costs, Development FTE Costs and Manufacturing Costs are (1) directly attributable and reasonably allocable to the conduct of such ongoing Development activities that were conducted following the Option Exercise Date and (2) in the case of Mersana&#8217;s ongoing Development </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-51-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">activities, incurred in connection with the conduct of such ongoing Development activities in a manner consistent with the estimate of such costs as provided by Mersana in the Option Data Package.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;Each Party will perform, and require that its Affiliates, Sublicensees and Third Party subcontractors perform, its Shared Global Development Activities as contemplated under this Agreement in a good scientific manner and in compliance with its Internal Policies, Applicable Law, including (if applicable) laws regarding the environment, safety and industrial hygiene, and GMP, GLP, GCP, informed consent and Institutional Review Board regulations, current standards for pharmacovigilance practice, and all applicable requirements relating to the protection of human subjects.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(d)&#160;&#160;&#160;&#160;During the Development Term, each Party may engage its Affiliates or Third Party subcontractors (including distributors, contract research organizations, contract testing organizations and CMOs) to perform any of its activities hereunder, including its obligations under the Joint Development Plan&#59; provided, however, that (i) Mersana may not engage a Third Party contractor to perform any activities under the Joint Development Plan, in each case, unless such Third Party contractor is specifically identified in the Joint Development Plan or otherwise approved by GSK (through GSK&#8217;s Alliance Manager) in writing (such approval not to be unreasonably withheld, conditioned or delayed), and (ii) any agreement between a Party (or any of its Affiliates) and any such Third Party subcontractor shall (A) be consistent with such Party&#8217;s obligations hereunder, including confidentiality and non-use provisions which are no less restrictive than those set forth in Section 12.1 (Confidentiality) and (B) &#91;**&#93; and (2) necessary or reasonably useful to Exploit the Licensed Compound or any Licensed Product.  The Party engaging a subcontractor shall remain responsible for the performance of its activities by such Affiliates and subcontractors in accordance with the applicable terms of this Agreement.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.2.4&#160;&#160;&#160;&#160;Shared Development Costs</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Except as set forth in Section 5.3 (Mersana&#8217;s Opt-Out Right), and further subject to this Section 5.2.4 (Shared Development Costs), (x) during the Development Term, subject to Section 11.4.2 (Overruns), the Parties will share Development Costs incurred in the performance of Shared Global Development Activities undertaken in accordance with the Joint Development Plan and Joint Development Budget and (y) the Parties will share Development Costs incurred in the performance of Shared Global Development Activities undertaken in accordance with Section 3.2.3 (Expedited Dispute Resolution) or Section 5.2.3(b), as applicable, with GSK bearing &#91;**&#93; percent (&#91;**&#93;%) of such Development Costs and Mersana bearing &#91;**&#93; percent (&#91;**&#93;%) of such Development Costs.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;Notwithstanding the foregoing, to the extent that Mersana&#8217;s aggregate share of Development Costs (including all Deemed Buy-In payments) exceeds &#91;**&#93; Dollars ($&#91;**&#93;) (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Development Cost Cap</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), then unless and until Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), Mersana&#8217;s portion of any additional Development Costs (including any </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-52-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Deemed Buy-In payments) incurred above the Mersana Development Cost Cap (such Development Costs, &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Cap Excess Amounts</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) shall be borne by GSK&#59; provided that (i) any such Cap Excess Amounts for which GSK is responsible pursuant to this Section 5.2.4(a) shall accrue with interest in accordance with Section 11.4.4 (Cap Excess Amounts), (ii) such Cap Excess Amounts (and any accrued interest thereon) shall be, &#91;**&#93; repaid in full or in part by Mersana or offset against any future Regulatory Milestone Payments, Sales Milestone Payments or Royalties in accordance with Section 11.4.4 (Cap Excess Amounts), and (iii) if Mersana exercises its Profit Share Election pursuant to Section&#160;9.1.1 (Exercise of Profit Share Election), the Mersana Development Cost Cap would automatically expire upon the Profit Share Start Date and Mersana would thereafter recommence bearing its &#91;**&#93; percent (&#91;**&#93;%) share of Development Costs in accordance with this Section 5.2.4 (Shared Development Costs), subject to Section&#160;5.2.4(b).</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;Notwithstanding anything to the contrary set forth herein, from and after the first expiry of the Royalty Term of a Licensed Product in &#91;**&#93; (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Development Cost Share End Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), (A) Mersana&#8217;s obligation to share in &#91;**&#93; percent (&#91;**&#93;%) of such Development Costs shall terminate&#59; provided, however, that Mersana shall continue to have an obligation to share in Development Costs incurred (A) during the &#91;**&#93; period following the Development Cost Share End Date in connection with any Shared Global Development Activities (including any ongoing Clinical Trials) that were Initiated prior to the Development Cost Share End Date or (B) in connection with any Clinical Trial Initiated prior to the Development Cost Share End Date, solely to the extent such Clinical Trial is required by the FDA or EMA in order to maintain a Marketing Approval obtained for a Licensed Product prior to the Development Cost Share End Date (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Ongoing Shared Global Development Activities</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) and to perform any of its obligations with respect to such Ongoing Shared Global Development Activities as set forth in the Joint Development Plan in accordance with this Agreement&#59; and (ii) other than with respect to the Ongoing Shared Global Development Activities as set forth in the Joint Development Plan, as between the Parties, GSK, either itself or as it may determine, by and through its Affiliates, Sublicensees or subcontractors, will be solely responsible for, and shall have sole decision-making authority with respect to, the conduct of all Development activities for the Licensed Compound and Licensed Products, at GSK&#8217;s sole cost and expense.  For clarity, following the Development Cost Share End Date, other than with respect to any Ongoing Shared Global Development Activities, GSK shall have no further obligation to provide any Updates to the Joint Development Plan or Joint Development Budget or seek the JSC&#8217;s approval therefor.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;Reporting, reconciliation and sharing of Development Costs shall be managed in accordance with Section 11.4 (Sharing of Development Costs).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.2.5&#160;&#160;&#160;&#160;Development Reporting</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  In addition to Section 10.2.2 (Responsibilities of the JDC), with respect to any Shared Global Development Activities </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-53-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">conducted by or on behalf of either Party with respect to the Licensed Compound or any Licensed Product under the Joint Development Plan, within &#91;**&#93; following the end of each &#91;**&#93;, each Party shall prepare and provide to the other Party and the JDC (or the JSC, if the JDC is no longer meeting) a detailed written report that summarizes&#58; &#91;**&#93; (each, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Development Report</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  Each Party and the JDC shall have the right to review all Development Reports (including all Data set forth therein).  Each Party will respond to the reasonable questions or requests of the other Party&#8217;s JDC representatives for additional information relating to such Party&#8217;s Development activities under this Agreement in a timely manner.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.2.6&#160;&#160;&#160;&#160;Development Records</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  During the Development Term, each Party and its Affiliates will, and will require its Sublicensees and Third Party subcontractors to, maintain written or electronic records, in sufficient detail, in a good scientific manner (in accordance with GLP, GCP, and GMP, as applicable), and appropriate for regulatory and patent purposes, and that are complete and accurate in all material respects and properly reflect all Shared Global Development Activities performed and results achieved, in each case, by or on behalf of such Party and its Affiliates and Sublicensees under this Agreement, except with respect to Manufacturing records that relate to compounds and products other than the Licensed Compound and Licensed Products, record only such activities and not include or commingle records of activities outside the scope of this Agreement.  Such records will be retained for at least &#91;**&#93; following expiration or termination of this Agreement, or for such longer period as may be required by Applicable Law or the retaining Party&#8217;s Internal Policies.  Each Party shall have the right during the Development Term, during normal business hours and upon at least &#91;**&#93; notice at a time agreed to by the Parties, to inspect and copy any records kept by the other Party in accordance with this Section 5.2.6 (Performance of Shared Global Development Activities&#59; Development Records).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.2.7&#160;&#160;&#160;&#160;Pharmacovigilance and Adverse Event Reporting</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The Parties will cooperate with regard to the reporting and handling of safety information relating to the Licensed Compound or any Licensed Product in accordance with Applicable Law, including applicable regulatory requirements and regulations on pharmacovigilance and clinical safety.  Mersana will be responsible for all processing of information related to any adverse events for any Licensed Product until such time as the safety database is transferred to GSK on a timeline agreed to by the Parties, taking into account factors such as the allocation between the Parties of Shared Global Development Activities and transfers of Regulatory Filings.  Each Party will provide to the other Party the relevant safety information it receives (either directly or indirectly) related to a Licensed Product in accordance with the pharmacovigilance agreement entered into by the Parties in accordance with this Section 5.2.7 (Pharmacovigilance and Adverse Event Reporting).  The drug safety departments from each of the Parties shall meet and agree upon a written pharmacovigilance agreement for exchanging adverse event and other safety information and timelines within &#91;**&#93; following the License Effective Date, which pharmacovigilance agreement will provide for the transfer of Mersana&#8217;s then-current safety database for Licensed Products to GSK, including the timing for such transfer (which shall not be earlier than the transfer of the IND to GSK in accordance with Section 6.2.3 (Assignment of Regulatory Filings)).  Such written pharmacovigilance agreement shall ensure that adverse event and </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-54-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">other safety information is exchanged according to a schedule that will permit each Party (and its Sublicensees or designees) to comply with all Applicable Laws and, without limiting the foregoing, shall include provisions permitting Mersana to receive (a) all safety information that Mersana requires for its reporting obligations with respect to Clinical Trials sponsored by Mersana and (b) all safety information that may relate to the Mersana Platform.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.2.8&#160;&#160;&#160;&#160;Data Integrity Practices</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;Each Party and its respective Affiliates shall, and shall require its and their respective Sublicensees and Third Party subcontractors to, conduct all Shared Global Development Activities, including any Clinical Trials under the Joint Development Plan, in accordance with the following practices&#58;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(1)&#160;&#160;&#160;&#160;Data will be generated using sound scientific techniques and processes and ALCOA principles (A - attributable to the person generating the data&#59; L &#8211; legible and permanent&#59; C &#8211; contemporaneously recorded&#59; O &#8211; original record (or &#8216;true copy&#8217;)&#59; A &#8211; accurate) and CCEA (C &#8211; complete&#59; C &#8211; consistent&#59; E &#8211; enduring&#59; A &#8211; available)&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(2)&#160;&#160;&#160;&#160;Data will be accurately recorded by the Persons performing the applicable Development activities in accordance with data integrity practices&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(3)&#160;&#160;&#160;&#160;Data will be analyzed appropriately without bias in accordance with data integrity practices&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(4)&#160;&#160;&#160;&#160;Data and results from experiments and clinical studies will be stored securely such that it can be easily retrieved&#59; and</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(5)&#160;&#160;&#160;&#160;Data trails will exist to easily demonstrate or reconstruct key decisions made during the performance of all activities under the Joint Development Plan, presentations made about such activities, and conclusions reached with respect to the activities undertaken in the performance of the Joint Development Plan.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;GSK may request reasonable changes to the requirements set forth above in this Section 5.2.8 (Data Integrity Practices) where GSK reasonably believes such changes are required to ensure that such activities are undertaken in compliance with Applicable Law and GSK&#8217;s written standards applicable to GSK&#8217;s contracts with Persons conducting Development activities with or for GSK, including activities funded in whole or in part by GSK.  Mersana shall &#91;**&#93; as soon as reasonably practicable following receipt of GSK&#8217;s written request.  GSK shall be permitted, in its sole discretion and at its sole cost and expense, to undertake on-site compliance audits of Mersana&#8217;s data integrity practices in respect of the Shared Global Development Activities performed by Mersana to inspect Mersana&#8217;s compliance with the terms of this Section 5.2.8 (Data Integrity Practices) by providing Mersana with &#91;**&#93; written notice of GSK&#8217;s intent to do so, </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-55-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">such audits to be conducted at a time agreed by the Parties and no more frequently than once every &#91;**&#93; during the Term.  </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.2.9&#160;&#160;&#160;&#160;Animal Welfare</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;With respect to any Shared Global Development Activities conducted by or on behalf of either Party under the Joint Development Plan that involve the use of animals, including any animal studies, such Party and its respective Affiliates shall, and shall use Commercially Reasonable Efforts to require its and their respective Sublicensees and Third Party subcontractors to, comply with this Section 5.2.9 (Animal Welfare) and all Applicable Laws related to the care, welfare and ethical treatment of animals in the country where it is performing Development activities under this Agreement.  The Parties and their respective Affiliates further agree, and shall use Commercially Reasonable Efforts to require its and their respective Sublicensees and Third Party subcontractors, to comply with the &#8220;3Rs&#8221; principles &#8211; reducing the number of animals used, replacing animals with non-animal methods whenever possible and refining the research techniques used.  All work must be conducted in adherence to the core principles for animals set forth below in this Section 5.2.9 (Animal Welfare).  Local customs, norms, practices or Applicable Laws may be additive to the core principles, but each Party agrees to comply, and shall require its Affiliates and Third Party subcontractors to comply, at a minimum, with these core principles&#58;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(1)&#160;&#160;&#160;&#160;Access to species appropriate food and water&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(2)&#160;&#160;&#160;&#160;Access to species specific housing, including species appropriate temperature and humidity levels&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(3)&#160;&#160;&#160;&#160;Provision of humane care and a program of veterinary care through guidance of a veterinarian&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(4)&#160;&#160;&#160;&#160;Animal housing that minimizes the development of abnormal behaviors&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(5)&#160;&#160;&#160;&#160;Adherence to principles of replacement, refinement and reduction in the design of </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">in vivo</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> or </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">ex vivo</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> studies with processes to optimize animal use and to ensure effective population management&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(6)&#160;&#160;&#160;&#160;Work is supported by a relevant scientific justification or rationale, approved by an institutional ethical review process and subjected to independent scientific review (which may be satisfied by review by the Institutional Animal Care and Use Committee (IACUC))&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(7)&#160;&#160;&#160;&#160;Commitment to minimizing pain and distress during </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">in vivo</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> and </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">ex vivo</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> studies&#59; and</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-56-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(8)&#160;&#160;&#160;&#160;Work is performed by staff documented as trained and competent to conduct the procedures for which they are responsible.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;All animal study protocols shall undergo an ethical review, whether or not required by Applicable Law, and written documentation confirming ethical review shall be maintained by the applicable Party until &#91;**&#93; following the expiration or termination of this Agreement demonstrating that the review was completed.  Each Party shall have the right to inspect the other Party&#8217;s records upon reasonable notice&#59; provided that such inspection shall not extend to those parts of the records that the other Party can demonstrate to be subject to confidentiality arrangements with Third Parties.  </font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;If a Party is currently accredited by the Association for Assessment and Accreditation of Laboratory Animal Care International, then such Party agrees to use Commercially Reasonable Efforts to maintain such accreditation during the Term.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(d)&#160;&#160;&#160;&#160;Each Party shall have policies or procedures in place to ensure the qualification and training of its employees that work with animals.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(e)&#160;&#160;&#160;&#160;Upon reasonable advanced written notice and subject to the agreements each Party has with its Third Party subcontractors performing any Shared Global Development Activities, each Party (or its subcontractor&#47;delegate) shall have the right to inspect the other Party&#8217;s records and facilities as they relate to the conduct of animal work under the Joint Development Plan.  The scope of such inspection may include a tour of the facility, the opportunity to view relevant SOPs, training records, building management records, animal health records, ethical review documents, and any other documents in the applicable Party&#8217;s or its Affiliates&#8217; or subcontractors&#8217; possession reasonably necessary to assess compliance by such other Party with any of the terms and conditions of this Section 5.2.9 (Animal Welfare)&#59; provided that such inspection shall not extend to those parts of the records and facilities that the other Party can demonstrate to be subject to confidentiality arrangements with Third Parties.  To the extent that any significant deficiencies are identified as the result of such inspection, the other Party shall endeavor in good faith to take reasonable and practical corrective measures to remedy any such material deficiencies.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(f)&#160;&#160;&#160;&#160;Each Party shall promptly provide to the other Party information regarding any material deficiencies impacting the activities under the Joint Development Plan regarding its animal care and welfare program and any corrective actions taken, including copies of any regulatory enforcement action or inspection findings issued to the providing Party (or subcontractor) and relating to a systemic failure in the ethical care and treatment of animals in connection therewith.  The JDC shall discuss and develop a remediation strategy for any such material deficiencies regarding animal care and welfare.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-57-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(g)&#160;&#160;&#160;&#160;Each Party shall have a procedure in place to assess and approve its external suppliers and distributors who supply animals to such Party to (a) ascertain and confirm the quality of the animals supplied, (b) ensure legal requirements for the care and welfare of animals are met, (c) ensure that only purpose bred animals are used to conduct animal work under the Joint Development Plan, (d) minimize the distance of suppliers from such Party&#8217;s test facility (where practicable), (e) ensure minimum stress in transport processes (</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">e.g.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, stocking densities, carrying crates, food and water), and (f) ensure checks are in place on arrival to confirm only healthy animals are used in the conduct of the Joint Development Plan.  Such Party shall document the approval process for its animal suppliers and distributors, which documentation shall be made available to the other Party upon reasonable request.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.2.10&#160;&#160;&#160;&#160;Cybersecurity</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Each Party and its respective Affiliates shall, and shall require its and their respective Sublicensees and Third Party subcontractors to, adhere to and comply with industry standard information risk&#47;cyber security policies with respect to all activities conducted by such Party under this Agreement, including, &#91;**&#93;, obligations &#91;**&#93; set forth on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 5.2.10</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> (Cybersecurity).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.2.11&#160;&#160;&#160;&#160;R&#38;D Ethics &#38; Compliance</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises its Option pursuant to Section&#160;3.8 (Exercise of Option and License Effective Date), then each Party&#8217;s compliance officer responsible for Development activities (or other equivalent personnel of either Party) (each, an &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">R&#38;D Compliance Officer</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) will meet within &#91;**&#93; following the License Effective Date to (a) review each Party&#8217;s Internal Policies relevant to the Shared Global Development Activities to be undertaken in accordance with this Agreement&#59; (b) discuss implications for the Collaboration&#59; and (c) propose to the JDC within &#91;**&#93; following the License Effective Date (unless otherwise agreed by the Parties in writing) a plan regarding how each Party&#8217;s R&#38;D Compliance Officer or other appropriate personnel will support the JDC in addressing any ethics or compliance issues and risks with respect to such Shared Global Development Activities.  The JDC shall review such plan in good faith and agree to any modifications, with the final agreed plan documented in the JDC minutes.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.2.12&#160;&#160;&#160;&#160;Material Transfers</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;During the course of the performance of the Shared Global Development Activities, either Party (or such Party&#8217;s designee) (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Materials Transferring Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) may transfer to the other Party or its designee (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Materials Receiving Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) certain Materials for use in connection with such Shared Global Development Activities as contemplated under the Joint Development Plan.  Such Materials will be provided under the terms and conditions of this Agreement and in such amount as are described in a material transfer record for the particular transfer (each, an &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">MTR</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), in the form attached hereto as </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 5.2.12</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, which MTR shall set forth the type and name of the Materials transferred, the amount of the Materials transferred, the date of the transfer of such Materials and the proposed use of such Materials by the Materials Receiving Party.  For clarity, this Section 5.2.12 (Material Transfers) shall not apply to the supply of Licensed </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-58-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Compound or Licensed Products, which shall be governed under Article&#160;7 (Manufacturing and Supply).</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;MATERIALS SUPPLIED BY THE MATERIALS TRANSFERRING PARTY HEREUNDER ARE SUPPLIED IN &#8220;AS IS&#8221; CONDITION WITH NO WARRANTY, EXPRESS, IMPLIED OR STATUTORY, INCLUDING WARRANTIES OF MERCHANTABILITY, TITLE, NON-INFRINGEMENT, EXCLUSIVITY, OR FITNESS FOR A PARTICULAR PURPOSE.  ANY MATERIAL DELIVERED PURSUANT TO THIS AGREEMENT IS UNDERSTOOD TO BE EXPERIMENTAL IN NATURE AND MAY HAVE HAZARDOUS PROPERTIES.  THE MATERIALS RECEIVING PARTY WILL HANDLE THE MATERIAL ACCORDINGLY AND WILL INFORM THE MATERIALS TRANSFERRING PARTY IN WRITING OF ANY ADVERSE EFFECTS EXPERIENCED BY PERSONS HANDLING THE MATERIAL.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;The Materials Receiving Party acknowledges that, except for the licenses and other express rights granted herein, it does not have any claim to the Materials supplied by the Materials Transferring Party, or any license or rights to any proprietary information or intellectual property rights in or to the Materials.  For clarity, the Materials shall remain the sole and exclusive property of the Materials Transferring Party and shall be returned or destroyed at the request of the Materials Transferring Party.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(d)&#160;&#160;&#160;&#160;The Materials Receiving Party agrees that&#58;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(1)&#160;&#160;&#160;&#160;the Material(s) will be used solely for, and in compliance with, the Shared Global Development Activities as described in the then-current Joint Development Plan&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(2)&#160;&#160;&#160;&#160;the Material(s) will be used in compliance with all Applicable Laws&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(3)&#160;&#160;&#160;&#160;the Material(s) will not be used in human subjects, in Clinical Trials, or for diagnostic purposes involving human subjects (except, in each case, as otherwise described in this Agreement)&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(4)&#160;&#160;&#160;&#160;the Material(s) will be used only by the Materials Receiving Party and only in the Materials Receiving Party&#8217;s laboratory, except with the prior written consent of the Materials Transferring Party&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(5)&#160;&#160;&#160;&#160;the Material(s) will not be transferred to a Third Party without the prior written consent of the Materials Transferring Party&#59; and</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(6)&#160;&#160;&#160;&#160;the Materials Receiving Party shall not reverse engineer or attempt to determine the chemical structure, make-up or sequence of, or determine the chemical or biological properties of, or make or attempt to make any analogues, progeny or </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-59-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">derivatives of, or modifications to, such Materials except as expressly required to carry-out such Party&#8217;s obligations hereunder, including its activities pursuant to the Joint Development Plan.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(e)&#160;&#160;&#160;&#160;The Materials Receiving Party assumes all liability for damages that may arise from its use, storage or disposal of the Materials.  The Materials Transferring Party shall not be liable to the Materials Receiving Party for any loss, claim or demand made by the Materials Receiving Party, or made against the Materials Receiving Party by any Third Party, due to or arising from the use of the Materials, except for claims or demands made by Third Parties to the extent permitted by Applicable Law and to the extent caused by the negligence, willful misconduct, fraud or fraudulent misrepresentation of the Materials Transferring Party.  Upon termination of the relevant Shared Global Development Activities requiring use of the Materials or the Agreement in its entirety, as applicable, except for any continuing rights as set forth in this Agreement, the Materials Receiving Party shall discontinue its use of any Materials and shall, upon direction of the Materials Transferring Party, return or destroy (and certify destruction of) any remaining Material in compliance with all Applicable Laws.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.3&#160;&#160;&#160;&#160;Mersana Opt-Out Right</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.3.1&#160;&#160;&#160;&#160;New Registration Studies</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;Subject to Section 5.3.1(b), with respect to each New Registration Study proposed to be included in the Joint Development Plan, &#91;**&#93; with respect to such New Registration Study (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">New Registrational Study Materials</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) no earlier than &#91;**&#93; of such New Registration Study. During the period ending &#91;**&#93; following Mersana&#8217;s receipt of such New Registration Study Materials, Mersana shall have the right to elect, by delivery of written notice to GSK, to opt-out of its obligation to share in the Development Costs for such New Registration Study (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Opt-Out Right</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  Notwithstanding anything to the contrary set forth herein, the &#91;**&#93; (i) the expiration of such &#91;**&#93; period or (ii) the date on which Mersana exercises its Mersana Opt-Out Right (including if Mersana notifies GSK in writing prior to the delivery of such New Registration Study Materials that Mersana desires to exercise the Mersana Opt-Out Right).</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;&#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.3.2&#160;&#160;&#160;&#160;Independent Registration Studies</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;If Mersana exercises the Mersana Opt-Out Right  with respect to a given New Registration Study prior to the expiration of the applicable &#91;**&#93; period described in Section 5.3.1(a), then GSK shall have the right to conduct such New Registration Study in its sole discretion and at its sole cost and expense&#59; provided that, if GSK so elects to conduct such New Registration Study (thereafter, an &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Independent </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-60-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Registration Study</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), (i) the activities conducted by or on behalf of GSK or any of its Affiliates or Sublicensees in connection with such Independent Registration Study shall be GSK Development Activities, and (ii) subject to Section 5.3.2(c), any Out-of-Pocket Costs, Development FTE Costs or Manufacturing Costs incurred by GSK or any of its Affiliates in connection with the conduct of such Independent Registration Study shall not be included in the Development Costs but will be at GSK&#8217;s sole cost and expense.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;If GSK is conducting any Independent Registration Study pursuant to this Section 5.3.2 (Independent Registration Studies), then, &#91;**&#93;, GSK shall provide to the JDC a copy of any Updates to the study plan and budget prepared by or on behalf of GSK (or any of its Affiliates, Sublicensees or subcontractors, as applicable) with respect to such Independent Registration Study, the GSK Development Activities to be conducted with respect to such Independent Registration Study and the Out-Of-Pocket Costs, Development FTE Costs and Manufacturing Costs expected to be incurred by GSK or its Affiliates, in the performance of such Independent Registration Study.  During the conduct of such Independent Registration Study, GSK shall provide the JDC with a copy of any material amendments to such Independent Registration Study plan or budget, as applicable, and shall keep the JDC reasonably informed of any progress and results of activities for such Independent Registration Study, &#91;**&#93;.  In addition, GSK may elect (in its sole discretion) to share with the JDC one or more of its development plans for the conduct of any other GSK Development Activities pursuant to Section 5.5 (GSK Development Activities).  For the avoidance of doubt, any development plan (including any budgets provided in connection therewith) provided by GSK to the JDC pursuant to this Section 5.3.2(b) with respect to any Independent Registration Study or other GSK Development Activities (i) shall be provided for information purposes only, (ii) shall not be subject to agreement by the JDC or Financial Working Group, or approval by the JSC and (iii) GSK shall retain the sole decision-making authority with respect to any such development plan for such Independent Registration Study or other GSK Development Activities, as applicable.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;If Data from any given Independent Registration Study result in (i) receipt of initial Marketing Approval for a Licensed Product in the U.S. or European Union or (ii) if the applicable Licensed Product has already achieved Marketing Approval in the U.S. or European Union, &#91;**&#93;, Mersana shall pay to GSK an amount equal to the sum of (i) &#91;**&#93; percent (&#91;**&#93;%) of all Out-of-Pocket Costs, Development FTE Costs and Manufacturing Costs incurred by GSK or any of its Affiliates in the performance of such Independent Registration Study </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">plus</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> (ii) an amount equal to &#91;**&#93; percent (&#91;**&#93;%) of the applicable amount set forth in the foregoing clause (i) ((i) and (ii), collectively, the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Deemed Buy-In</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) in accordance with Section 11.4.3 (Deemed Buy-In Payments)&#59; provided that Mersana&#8217;s obligation to pay the Deemed Buy-In shall be subject to Section 5.2.4(a).</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-61-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(d)&#160;&#160;&#160;&#160;If Data from any given Independent Registration Study result in (i) receipt of initial Marketing Approval for a Licensed Product in the U.S. or European Union or (ii) if the applicable Licensed Product has already achieved Marketing Approval in the U.S. or European Union, &#91;**&#93;, then GSK shall &#91;**&#93; submit to the Financial Working Group a statement of all Out-of-Pocket Costs, Development FTE Costs and Manufacturing Costs incurred by GSK or any of its Affiliates in the performance of such Independent Registration Study in order for the calculation of the applicable Deemed Buy-In to be made in accordance with Section&#160;11.4.3 (Deemed Buy-In Payments).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.4&#160;&#160;&#160;&#160;Mersana Know-How Transfer</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises the Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then Mersana and its Affiliates shall, during the Development Term, reasonably cooperate with, and provide reasonable assistance to, GSK (and its designees) to enable GSK (and its Affiliates, Sublicensees and subcontractors, as applicable) to Exploit the Licensed Compound and any Licensed Products in the Territory in accordance with this Section 5.4 (Mersana Know-How Transfer).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.4.1&#160;&#160;&#160;&#160;Existing Mersana Know-How Transfer</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Promptly following the License Effective Date, to the extent not done so already, Mersana shall transfer to GSK (or its designee), in a manner agreed by the JDC, any material Mersana Know-How that is in the possession and Control of Mersana or any of its Affiliates as of the License Effective Date and necessary or reasonably useful for the Exploitation of the Licensed Compound or any Licensed Products in the Territory in accordance with this Agreement, in a format reasonably acceptable to GSK, but excluding (a) any such Mersana Know-How relating to the Manufacturing of the Licensed Compound or Licensed Products (which shall be transferred pursuant to Section 7.3 (Manufacturing Technology Transfer))&#59; and (b) any Mersana Know-How that was previously transferred to GSK pursuant to Section 3.2 (Option Data Package), Section 3.3 (Information Rights During Option Exercise Period), Section 3.5 (Inability of Mersana to Deliver Option Data Package) or Section 3.6 (Material Breach of Mersana ODP Diligence Obligations), as applicable.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.4.2&#160;&#160;&#160;&#160;Mersana Know-How Transfer During the Development Term</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  During the Development Term, Mersana shall promptly disclose to GSK and transfer to GSK (or its designee), in a manner agreed by the JDC, (a) any additional Mersana Know-How that Mersana (or any of its Affiliates) identifies or acquires Control of during the Development Term (including any Data or other Arising Know-How generated by or on behalf of Mersana or any of its Affiliates in connection with the conduct of Shared Global Development Activities), to the extent such Mersana Know-How is necessary or reasonably useful for the Exploitation of the Licensed Compound or any Licensed Products in the Territory in accordance with this Agreement or (b) at GSK&#8217;s request, (i) any other Mersana Background Know-How to the extent necessary or useful for the Exploitation of the Licensed Compound or any Licensed Products in the Territory in accordance with this Agreement or (ii) any other Mersana Arising Know-How, in each case ((a) or (b)), that has not previously been transferred to GSK under this Agreement (including pursuant to Section 3.2 (Option Data Package), Section 3.3 (Information Rights During Option Exercise Period), Section 3.5 (Inability of Mersana to Deliver Option Data Package) or Section 3.6 (Material Breach of Mersana ODP Diligence </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-62-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Obligations, Section 5.4.1 (Existing Mersana Know-How Transfer) or Section 7.3 (Manufacturing Technology Transfer), as applicable), in a format reasonably acceptable to GSK.  </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.4.3&#160;&#160;&#160;&#160;Cooperation</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  During the Development Term, Mersana shall provide GSK (and its designees) with reasonable access by teleconference or in-person (as reasonably requested by GSK) to Mersana personnel (and personnel of its Affiliates and Third Party subcontractors) involved in the Exploitation of the Licensed Compound or any Licensed Product to assist with the transition and the implementation of the Mersana Know-How and answer questions related to Licensed Compound or any Licensed Product.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.4.4&#160;&#160;&#160;&#160;Allocation of Costs of Mersana Know-How Transfer</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to Section 7.3 (Manufacturing Technology Transfer), (a) with respect to the technology transfer of any Mersana Know-How existing as of the License Effective Date pursuant to Section 5.4.1 (Existing Mersana Know-How Transfer), such technology transfer and assistance shall be at no additional cost to GSK&#59; and (b) with respect to the technology transfer of any other Mersana Know-How pursuant to Section 5.4.2 (Mersana Know-How Transfer During the Development Term) and the assistance provided pursuant to Section 5.4.3 (Cooperation), all reasonable Development FTE Costs and Out-of-Pocket Costs incurred by either Party or its Affiliates in conducting such technology transfer and assistance shall be deemed to be Development Costs shared by the Parties in accordance with Section 5.2.4 (Shared Development Costs) and Section 11.4 (Sharing of Development Costs).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.5&#160;&#160;&#160;&#160;GSK Development Activities</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  During the Collaboration Term, as between the Parties, GSK will be solely responsible for the conduct of all Development activities (including all non-clinical or pre-clinical studies or Clinical Trials and all activities related to value-evidence outcomes, patient-focused outcomes and epidemiology) for the Licensed Compound and all Licensed Products (including any Combination Products or Combination Therapies) in the Territory, in each case, other than the Shared Global Development Activities, including any Independent Registration Studies conducted pursuant to Section 5.3.2 (Independent Registration Studies) (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Development Activities</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  Notwithstanding the foregoing, from time to time during the Development Term, GSK shall keep the JDC reasonably informed with respect to any material GSK Development Activities, including providing periodic updates with respect thereto.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">5.6&#160;&#160;&#160;&#160;GSK Development Diligence</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  GSK (directly, or through its Affiliates or its or their Sublicensees and subcontractors) will use Commercially Reasonable Efforts to Develop the Licensed Products in the Field in the Territory &#91;**&#93;.</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ARTICLE 6<br>REGULATORY MATTERS</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">6.1&#160;&#160;&#160;&#160;General</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises the Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, during the Collaboration Term, as between the Parties, except as otherwise provided in this Agreement, including pursuant to Article 10 (Management of the Collaboration) and this Article 6 (Regulatory Matters), GSK shall have the exclusive right to conduct (directly or through any of its Affiliates, Sublicensees or subcontractors), and the sole responsibility for, all regulatory matters for the Licensed Compound or any Licensed Products throughout the Territory, including with respect to (a) any communications, filings, submissions or interactions with any Regulatory </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-63-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Authority in the Territory in connection with any Development of the Licensed Compound or any Licensed Product&#59; or (b) seeking or maintaining any Regulatory Approvals in the Territory for any Licensed Product.  For the avoidance of doubt, as between the Parties, GSK shall have sole responsibility for any regulatory matters in connection with any GSK Development Activities or Independent Registration Studies, including any Regulatory Approvals or any communications, filings, submissions or interactions with any Regulatory Authority, and will own, all Regulatory Filings in the Territory, in connection therewith.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">6.2&#160;&#160;&#160;&#160;Shared Global Development Activities</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Notwithstanding Section 6.1 (General), If GSK exercises the Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, during the Collaboration Term, the Parties will conduct any regulatory activities with respect to any Shared Global Development Activities in accordance with the regulatory strategy set forth in the Joint Development Plan and the terms of this Article 6 (Regulatory Matters).  The JDC will oversee the implementation of, and discuss progress regarding, such regulatory strategy.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">6.2.1&#160;&#160;&#160;&#160;Regulatory Responsibilities</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to the remainder of this Article 6 (Regulatory Matters), each Party will lead all regulatory matters relating to the Shared Global Development Activities for which such Party is responsible in accordance with the Joint Development Plan (such Party, the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Regulatory Responsible Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;)&#59; &#91;**&#93;.  Subject to GSK&#8217;s right of reference as described in Section 6.3 (Right of Reference), the Regulatory Responsible Party shall file in its name, and will own, all Regulatory Filings for which such Regulatory Responsible Party is responsible and will own all applicable Regulatory Approvals for all Licensed Products in the U.S. or the European Union until, in the case of Regulatory Filings initially owned by Mersana, such Regulatory Filings are assigned to GSK pursuant to Section 6.2.3 (Assignment of Regulatory Filings).  Subject to this Article 6 (Regulatory Matters), the Regulatory Responsible Party will have the sole responsibility for (a) overseeing, monitoring and coordinating all applicable regulatory actions, communications and filings with, and submissions to, each applicable Regulatory Authority with respect to each applicable Licensed Product&#59; (b) interfacing, corresponding and meeting with each applicable Regulatory Authority in the Territory with respect to each applicable Licensed Product&#59; and (c) seeking and maintaining all applicable Regulatory Approvals in the Territory with respect to each applicable Licensed Product, in each case ((a)-(c)), for so long as such Party is the Regulatory Responsible Party with respect to the applicable activities.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">6.2.2&#160;&#160;&#160;&#160;Regulatory Cooperation</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  As reasonably requested by the Regulatory Responsible Party from time to time during the Term, the other Party shall promptly provide reasonable assistance to the Regulatory Responsible Party with respect to filings and other interactions with Regulatory Authorities regarding the Licensed Compound and Licensed Products for which such Regulatory Responsible Party is responsible.  Each Party shall ensure that sufficient knowledgeable staff are available to provide prompt responses regarding the Licensed Compound and Licensed Products within the timelines as required by applicable Regulatory Authorities, including to provide applicable Data in the possession of such Party (or its Affiliates or Third Party subcontractors) to Regulatory Authorities during the conduct of any regulatory inspection regarding any Shared Global Development Activities.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-64-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">6.2.3&#160;&#160;&#160;&#160;Assignment of Regulatory Filings</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Unless otherwise agreed by the Parties, with respect to each Regulatory Filing (including any applicable IND) that (a) relates solely to the Licensed Compound or any Licensed Product,  (b) is not already held in the name of GSK or any of its Affiliates or Sublicensees and (c) with respect to which Mersana is no longer the Regulatory Responsible Party, Mersana will assign to GSK all rights, title, and interests in and to each such Regulatory Filing, and provide GSK a copy of each such Regulatory Filing, on a reasonably prompt timeline as agreed by the Parties.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">6.2.4&#160;&#160;&#160;&#160;Meetings and Communications</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  During the Collaboration Term, each Party will keep the other Party reasonably informed of any material communications from, or meetings with, any Regulatory Authority pertaining to such Party&#8217;s Shared Global Development Activities performed under this Agreement promptly following receipt thereof.  In addition, during the Collaboration Term, to the extent relating to a Licensed Product, the applicable Regulatory Responsible Party will provide the other Party with&#58; (a) to the extent allowable by Applicable Laws and the relevant Regulatory Authority and to the extent practicable, an opportunity to have one or more of its representatives attend and observe substantive discussions and meetings with the FDA or any other Regulatory Authority with respect to any Clinical Trials or other matters (</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">e.g.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, CMC or non-clinical issues)&#59; (b) a copy of any material documents, reports or correspondence submitted to the FDA or any other Regulatory Authority&#59; and (c) reasonable advanced notice (to the extent practicable) of substantive meetings, scheduled or unscheduled, with the FDA or any other Regulatory Authority.  To the extent practicable, each Party will use Commercially Reasonable Efforts to provide all such documents or reports described in clause (b) above to the non-Regulatory Responsible Party at least &#91;**&#93; prior to their submission to the applicable Regulatory Authority (or such later date as the Parties may reasonably agree), and the Regulatory Responsible Party will reasonably consider any comments provided by the non-Regulatory Responsible Party with respect to such documents or reports in good faith.  During the Collaboration Term, to the extent a Party receives material written or oral communications from the FDA or any other Regulatory Authority relating to a Licensed Product or activities under this Agreement, such Party shall notify the other Party and provide a copy of any such written communications to the other Party within &#91;**&#93;.  In addition, during the Collaboration Term, upon a reasonable request from the other Party, each Party shall provide copies of other documents, reports or communications from or to Regulatory Authorities relating to Licensed Products.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">6.3&#160;&#160;&#160;&#160;Rights of Reference</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises the Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, during the Collaboration Term, each Party shall have the right, without obtaining the approval of the other Party and without additional payment to such other Party (other than payments expressly provided in this Agreement), to reference (including a &#8220;Right of Reference&#8221; as that term is defined in 21 C.F.R. &#167; 314.3(b) (or any successor rule), and corresponding rights under the foreign equivalents of 21 C.F.R. &#167; 314.3(b) in the applicable countries in the Territory), copy, access and use Data, and all reports, documents, Regulatory Filings, and other information developed by such other Party or any of its Affiliates that is derived from or includes such Data, in each case, that is necessary to Exploit a Licensed Compound or Licensed Product and that is Controlled by such other Party or its Affiliates (a) for purposes of preparing and submitting INDs, NDAs, BLAs and other Regulatory Filings for the Licensed Products, </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-65-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">and (b) preparing and filing patent applications, in each case ((a) and (b)), in accordance with this Agreement.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">6.4&#160;&#160;&#160;&#160;Recall, Withdrawal or Field Alert of a Licensed Product</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If any Governmental Authority threatens in writing or initiates any action to remove a Licensed Product from the market (in whole or in part) in the Territory, then the Party receiving notice thereof will notify the other Party of such communication immediately, but in no event later than &#91;**&#93; following receipt thereof.</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ARTICLE 7<br>MANUFACTURING AND SUPPLY</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">7.1&#160;&#160;&#160;&#160;General</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises the Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, during the Collaboration Term, as between the Parties, except as otherwise provided in this Agreement, including pursuant to Article 5 (Development), Article 10 (Management of the Collaboration) and this Article 7 (Manufacturing and Supply), GSK shall have the exclusive right to conduct (directly or through any of its Affiliates, Sublicensees or subcontractors), and the sole responsibility for, the Manufacturing of the Licensed Compound (including any component piece thereof for the Manufacturing of the Licensed Compound and any Licensed Products for Development and Commercialization in the Field in the Territory, subject to the Mersana Retained Rights and Mersana&#8217;s and its Affiliates&#8217; and (sub)licensees&#8217; reserved right to Manufacture or have Manufactured such components for other purposes that are consistent with Mersana&#8217;s obligations under Section 4.5 (Exclusivity)) or any Licensed Products throughout the Territory, including any Clinical Manufacturing, Commercial Manufacturing or supply of the Licensed Compound or any Licensed Product.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">7.2&#160;&#160;&#160;&#160;Manufacturing Responsibilities</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises the Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, during the Collaboration Term, the Parties shall conduct the Manufacture and supply of the Licensed Compound and Licensed Products in the Territory, including any Clinical Manufacturing, CMC Development under the Joint Development Plan, supply chain strategy, establishment of Manufacturing sources, capacity and supply chains, or Commercial Manufacturing with respect thereto, in accordance with this Section 7.2 (Manufacturing Responsibilities).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">7.2.1&#160;&#160;&#160;&#160;JMC Oversight&#59; Efforts</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  During the Development Term, the JMC, in consultation with JDC and the Financial Working Group, shall oversee the Clinical Manufacture and supply of the Licensed Compound and Licensed Products for the Shared Global Development Activities, including any CMC Development under the Joint Development Plan, supply chain strategy and establishment of Manufacturing sources, capacity or supply chains with respect thereto, in accordance with this Article 7 (Manufacturing and Supply) and Section 10.3 (Joint Manufacturing Committee).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">7.2.2&#160;&#160;&#160;&#160;Clinical Supply</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;As between the Parties, from the License Effective Date until the Manufacturing Transition Date, Mersana will (either itself or with or through an Affiliate or a Third Party subcontractor) Clinically Manufacture and supply the Licensed Compound and Licensed Products as required for the performance of all Development under the Initial Development Plan and all Shared Global Development Activities and GSK Development Activities, as applicable.  To the </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-66-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">extent the Manufacturing Costs for such supply are included as Development Costs under the Joint Development Budget or described in Section 3.2.3 (Expedited Dispute Resolution) or Section 5.2.3(b), such Manufacturing Costs will be shared by the Parties in accordance with Section 5.2.4 (Shared Development Costs) and Section 11.4 (Sharing of Development Costs).  Such Clinical Manufacturing and supply of the Licensed Compound and Licensed Products by Mersana to GSK will be pursuant to, and subject to the terms of, the applicable Clinical Supply Agreement to be entered into by the Parties pursuant to Section 7.2.2(c).  Without limiting the foregoing, in connection with Mersana&#8217;s Clinical Manufacture and supply of the Licensed Compound and Licensed Products for the conduct of any activities under the Collaboration (including for the conduct of any Shared Global Development Activities for which Mersana is responsible under the Joint Development Plan), Mersana shall provide to GSK (A) qualified person declaration, per Directive 2001&#47;83&#47;EC of the European Parliament (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">QP Declaration</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), in a form reasonably acceptable to GSK, for the complete GMP supply chain (as described in applicable guidance, </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">e.g.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, EMA&#47;196292&#47;2014)of the Licensed Compound and Licensed Products supplied by or on behalf of Mersana to GSK, (B) necessary and available supporting documentation with respect to such QP Declaration as demonstrated in the most recent quality control audits, (C) access to all audit reports related to quality control for the Licensed Compound and Licensed Products supplied by or on behalf of Mersana to GSK&#59; and (D) upon release of any batches of Licensed Compound or Licensed Product supplied by or on behalf of Mersana to GSK for the conduct of any Clinical Trials for the Licensed Product for which GSK is the sponsor, a QP Declaration covering Manufacture of unlabeled vials referencing any applicable Regulatory Filings.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;Following the Manufacturing Transition Date, as between the Parties, except as otherwise expressly provided under this Agreement or mutually agreed by the Parties in a Clinical Supply Agreement entered into pursuant to Section 7.2.2(c), GSK shall be solely responsible for all Clinical Manufacture and supply of the Licensed Compound (including any component piece thereof for the Manufacturing of the Licensed Compound and any Licensed Products for Development and Commercialization in the Field in the Territory, subject to the Mersana Retained Rights and Mersana&#8217;s and its Affiliates&#8217; and (sub)licensees&#8217; reserved right to Manufacture or have Manufactured such components for other purposes that are consistent with Mersana&#8217;s obligations under Section 4.5 (Exclusivity)) and Licensed Products throughout the Territory (including for the performance of all Shared Global Development Activities or GSK Development Activities, as applicable), &#91;**&#93;.  Notwithstanding anything to the contrary in the foregoing, if, following the Manufacturing Transition Date, Mersana requests supply of Licensed Compound or Licensed Products from GSK for the conduct of any Shared Global Development Activities by or on behalf of Mersana (or any of its Affiliates or Third Party subcontractors) hereunder, then, with respect to any such Licensed Compound or Licensed Product that is Clinically Manufactured and supplied to Mersana (or its Affiliate or Third Party subcontractor) by </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-67-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">or on behalf of GSK (or any of its Affiliates or Sublicensees), such Licensed Compound or Licensed Product shall be supplied pursuant to, and subject to the terms of, the applicable Clinical Supply Agreement to be entered into by the Parties pursuant to Section 7.2.2(c).  To the extent the Manufacturing Costs for such supply are included as Development Costs under the Joint Development Budget or described in Section 3.2.3 (Expedited Dispute Resolution) or Section 5.2.3(b), such Manufacturing Costs will be shared by the Parties in accordance with Section 5.2.4 (Shared Development Costs) and Section 11.4 (Sharing of Development Costs).  Without limiting the foregoing, in connection with GSK&#8217;s Clinical Manufacture and supply of the Licensed Compound and Licensed Products to Mersana, GSK shall provide to Mersana (A) a QP Declaration, in a form reasonably acceptable to Mersana, for the complete supply chain of the Licensed Compound and Licensed Products supplied by or on behalf of GSK to Mersana, (B) necessary and available supporting documentation with respect to such QP Declaration as demonstrated in the most recent quality control audits, (C) access to all audit reports related to quality control for the Licensed Compound and Licensed Products supplied by or on behalf of GSK to Mersana&#59; and (D) upon release of any batches of Licensed Compound or Licensed Product supplied by or on behalf of GSK to Mersana for the conduct of any Clinical Trials for the Licensed Product for which Mersana is the sponsor, a QP Declaration covering Manufacture of unlabeled vials referencing any applicable Regulatory Filings.  &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;With respect to Party&#8217;s obligation to Clinically Manufacture and supply the Licensed Compound and Licensed Products pursuant to Section&#160;7.2.2(a) or Section 7.2.2(b), following the License Effective Date, the Parties shall negotiate in good faith and enter into one or more mutual clinical supply agreement(s) (each such supply agreement, together with any related quality agreement(s), a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Clinical Supply Agreement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;)&#59; provided that each Clinical Supply Agreement shall include terms for the required lead time from the date the Party supplying Licensed Products receives the purchase order from the other Party and the requested delivery date in the purchase order and will be on terms customary for supply agreements between collaboration partners with respect to Development of products and be consistent with any key terms as may be agreed between the Parties prior the License Effective Date pursuant to Section 3.3.2 (Technology Transfer Planning) and this Section 7.2.2 (Clinical Supply).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">7.2.3&#160;&#160;&#160;&#160;Commercial Supply</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  During the Collaboration Term, as between the Parties, GSK shall be solely responsible for the Commercial Manufacturing and supply of the Licensed Compound (including any component piece thereof for the Manufacturing of the Licensed Compound and any Licensed Products for Development and Commercialization in the Field in the Territory, subject to the Mersana Retained Rights and Mersana&#8217;s and its Affiliates&#8217; and (sub)licensees&#8217; reserved right to Manufacture or have Manufactured such components for other purposes that are consistent with Mersana&#8217;s obligations under Section 4.5 (Exclusivity)) and Licensed Products throughout the Territory&#91;**&#93;.  If Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), the Licensed Compound and </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-68-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Licensed Products that are Commercially Manufactured or supplied by or on behalf of GSK or Mersana (or any of their respective Affiliates or Sublicensees) for sale in the Shared Territory shall be supplied at a price equal to the Manufacturing Costs and included as Allowable Expenses in accordance with Section 11.5 (Pre-Tax Profit or Loss Sharing).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">7.3&#160;&#160;&#160;&#160;Manufacturing Technology Transfer</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises the Option pursuant to Section&#160;3.8 (Exercise of Option and License Effective Date), then, without limiting Section&#160;5.4 (Mersana Know-How Transfer), Mersana shall conduct a manufacturing technology transfer to GSK in accordance with this Section 7.3 (Manufacturing Technology Transfer) to enable GSK (and its Affiliates, Sublicensees and subcontractors, as applicable) to Manufacture and supply the Licensed Compound and Licensed Products in the Territory in accordance with this Agreement (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Manufacturing Tech Transfer</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">7.3.1&#160;&#160;&#160;&#160;Manufacturing Tech Transfer Plan</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Within &#91;**&#93; following the establishment of the JMC pursuant to Section 10.3.1 (Establishment of JMC), the JMC will discuss, prepare and agree upon an initial Manufacturing technology transfer plan for the transfer from Mersana of Know-How within the Mersana Technology necessary or reasonably useful to Manufacture the Licensed Compound and Licensed Products (such plan, as approved by the JSC pursuant to this Section 7.3.1 (Manufacturing Tech Transfer Plan), the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Manufacturing Tech Transfer Plan</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), which will include details regarding the Parties&#8217; respective responsibilities under the Manufacturing Tech Transfer Plan (including any applicable timelines with respect thereto and the format of, and media for exchanging, any of the Mersana Know-How necessary or reasonably useful for the Manufacture of the Licensed Compound or any Licensed Product, as applicable) &#91;**&#93;&#59; provided that the Manufacturing Tech Transfer Plan shall (a) be consistent with any key terms as may be agreed between the Parties prior the License Effective Date pursuant to Section 3.3.2 (Technology Transfer Planning)&#59; and (b) include transfer to GSK (or its designee) of (i) &#91;**&#93; and (ii) either (A) &#91;**&#93;&#59; or (B) approximately &#91;**&#93; percent (&#91;**&#93;%) &#91;**&#93; for use with the Licensed Compound and Licensed Products.  The JMC shall submit its recommendation for the initial Manufacturing Tech Transfer Plan &#91;**&#93; or any subsequent amendments thereto to the JSC to review, discuss and determine whether to approve&#59; provided that such initial Manufacturing Tech Transfer Plan &#91;**&#93; or any subsequent amendments thereto shall only be effective upon approval thereof by the JSC.  Following approval by the JSC, such Manufacturing Tech Transfer Plan shall be included as part of the Joint Development Plan &#91;**&#93;, in each case, subject to the applicable terms of this Agreement.  At any time following approval of the Manufacturing Tech Plan, until Completion of the Manufacturing Tech Transfer, either Party shall have the right to propose an amendment to the Manufacturing Tech Transfer Plan to the JMC for review and discussion in accordance with this Section 7.3.1 (Manufacturing Tech Transfer Plan).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">7.3.2&#160;&#160;&#160;&#160;Performance of Manufacturing Tech Transfer</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Following the JSC&#8217;s approval of the Manufacturing Technology Transfer Plan pursuant to Section&#160;7.3.1 (Manufacturing Tech Transfer Plan), the Parties will perform the Manufacturing Tech Transfer in accordance with the Manufacturing Tech Transfer Plan (including the applicable timelines set forth therein &#91;**&#93;).  Notwithstanding anything to the contrary in Section 5.4 (Mersana Know-How Transfer), the JMC will manage and oversee the transfer of Know-How within </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-69-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">the Mersana Technology as set forth in the Manufacturing Tech Transfer Plan.  Without limiting the foregoing, each Party will use Commercially Reasonable Efforts to facilitate GSK&#8217;s and Mersana&#8217;s shared goal of an orderly transition and successful completion of the Manufacturing Tech Transfer in accordance with the timelines set forth in the Manufacturing Tech Transfer Plan and the &#91;**&#93; and uninterrupted Development of the Licensed Compound and Licensed Products in compliance with any applicable GMP requirements.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">7.3.3&#160;&#160;&#160;&#160;Completion of Manufacturing Tech Transfer</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The Manufacturing Tech Transfer shall be deemed completed (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Completion of Manufacturing Tech Transfer</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) upon the first date on which all of the following conditions have been satisfied, to the extent applicable (the date on which all of the applicable conditions set forth in clauses (a)-(c) have been satisfied, the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Manufacturing Transition Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;)&#58;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;The activities under the Manufacturing Tech Transfer Plan, including achievement of any applicable success criteria as set forth therein, have been completed &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;&#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;&#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">7.4&#160;&#160;&#160;&#160;Manufacturing Cost Reimbursement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">7.4.1&#160;&#160;&#160;&#160;Licensed Product Allocated to Shared Global Development Activities</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  With respect to any unit of Licensed Product where the Manufacturing Costs of such unit of Licensed Product were included as Development Costs to be shared by the Parties in accordance with Section 5.2.4 (Shared Development Costs) or Section 11.4 (Sharing of Development Costs), as applicable, without limiting GSK&#8217;s Royalty, Milestone Payment or other payment obligations under this Agreement&#58;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;if GSK or any of its Affiliates or Sublicensees (i) &#91;**&#93; or (ii) &#91;**&#93; conduct Shared Global Development Activities or &#91;**&#93;, then GSK shall reimburse Mersana an amount equal to &#91;**&#93; percent (&#91;**&#93;%) of the Manufacturing Costs for such unit of Licensed Product&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;if GSK or any of its Affiliates or Sublicensees provides such Licensed Product to a Third Party for purposes of conducting Shared Global Development Activities &#91;**&#93;, then GSK shall pay to Mersana an amount equal to &#91;**&#93; percent (&#91;**&#93;%) of such consideration&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;notwithstanding the foregoing, with respect to any amount payable by GSK pursuant to Section 7.4.1(a) or Section 7.4.1(b), as applicable, in lieu of &#91;**&#93;&#59; and</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(d)&#160;&#160;&#160;&#160;the Parties shall discuss and agree (via the Financial Working Group, in consultation with the JDC, JCC and JMC, and subject to JSC approval) the appropriate methodology for calculating any such amount &#91;**&#93;, as applicable, and, following the determination of such amount by the Financial Working Group in accordance with such methodology, GSK shall pay such reimbursement amount (but, for </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-70-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">clarity, excluding any amount for which &#91;**&#93;) within &#91;**&#93; following GSK&#8217;s receipt of an invoice from Mersana in accordance with Section 11.9.2 (Invoicing) with respect thereto.  </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">7.4.2&#160;&#160;&#160;&#160;Licensed Product Allocated to Other Activities</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  With respect to any Licensed Product where the Manufacturing Costs of such Licensed Product were not included as Development Costs to be shared by the Parties in accordance with Section 5.2.4 (Shared Development Costs) and Section 11.4 (Sharing of Development Costs) because the &#91;**&#93; allocated such Licensed Product inventory to be used in Development activities that are not Shared Global Development Activities, inventory to be used in Commercialization in the Shared Territory, or inventory to be used in Commercialization in the GSK Territory, if such Licensed Product is later used in Shared Global Development Activities, then each Party shall pay to the other Party an amount such that GSK has incurred &#91;**&#93; percent (&#91;**&#93;%) of the Manufacturing Costs of such Licensed Product and Mersana has incurred &#91;**&#93; percent (&#91;**&#93;%) of the Manufacturing Costs of such Licensed Product.</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ARTICLE 8<br>COMMERCIALIZATION</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">8.1&#160;&#160;&#160;&#160;General</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises the Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, during the Collaboration Term, as between the Parties, except as otherwise provided in this Agreement (including pursuant to this Article 8 (Commercialization), Article 9 (Profit Share Election&#59; Co-Promotion Right), as applicable, or Article 10 (Management of the Collaboration)), GSK shall have the exclusive right to conduct (directly or through any of its Affiliates, Sublicensees or subcontractors), and the sole responsibility for, the Commercialization of all Licensed Products throughout the Territory.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">8.2&#160;&#160;&#160;&#160;Diligence</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to obtaining and maintaining the applicable Marketing Approval for a Licensed Product in the Field in the applicable country or regulatory jurisdiction in the Territory, GSK (directly, or through its Affiliates, its or their Sublicensees or subcontractors) will use Commercially Reasonable Efforts to Commercialize such Licensed Product for at least &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">8.3&#160;&#160;&#160;&#160;Commercialization Advisory Committee</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">8.3.1&#160;&#160;&#160;&#160;Establishment of CAC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  No later than &#91;**&#93; following the date on which GSK has formed the first internal brand team for a Licensed Product in the U.S. (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Brand Team</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), the Parties shall establish a Commercialization Advisory Committee (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">CAC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), which shall be composed of &#91;**&#93; representatives from each of Mersana and GSK.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">8.3.2&#160;&#160;&#160;&#160;Commercialization Framework&#59; Responsibilities of the CAC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Following the formation of the CAC, in order to allow Mersana to make an informed decision on the exercise of its Profit Share Election or its Co-Promotion Right, as applicable, GSK will provide &#91;**&#93; to the CAC for review and discussion following the creation of the same (and, until the delivery of the Mersana Option Package pursuant to Section 9.1.1 (Exercise of Profit Share Election), any updates thereto) by the &#91;**&#93; in the normal course of GSK&#8217;s internal business operations for commercial planning&#58; &#91;**&#93;, collectively, the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Commercialization Framework</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  The CAC shall review and discuss the </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-71-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">planned Commercialization of the Licensed Products in the U.S. and Mersana&#8217;s Profit Share Election and Co-Promotion Right, including the Commercialization Framework, but shall serve an informational and advisory purpose only and shall have no decision-making authority.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">8.3.3&#160;&#160;&#160;&#160;CAC Meetings</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  During the term set forth in Section 8.3.4 (Term of the CAC), the CAC shall meet &#91;**&#93; (or more or less frequently as agreed by the Parties in writing).  At least &#91;**&#93; per year will be in-person, unless the Parties agree to meet by an alternative mechanism (</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">e.g.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, telephone or videoconference).  CAC meetings may be conducted by telephone, videoconference or in person.  Any in-person CAC meetings shall be held on an alternating basis between Mersana&#8217;s and GSK&#8217;s facilities, unless otherwise agreed by the Parties in writing.  Each Party shall be responsible for its own expenses in attending such meetings.  The Alliance Managers shall provide the members of the CAC with no less than &#91;**&#93; notice of each regularly scheduled meeting.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">8.3.4&#160;&#160;&#160;&#160;Term of the CAC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The CAC shall meet in accordance with Section 8.3.3 (CAC Meetings) until the earlier of (a) if Mersana does not exercise its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election) prior to the expiration of the Mersana Exercise Period, the expiration of the Mersana Exercise Period or (b) if Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), the formation of the JCC pursuant to Section 10.4.1 (Establishment of JCC).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">8.4&#160;&#160;&#160;&#160;&#91;**&#93;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">8.5&#160;&#160;&#160;&#160;Limited Disclosure</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  For the avoidance of doubt, except as set forth in Section 8.3.2 (Commercialization Framework&#59; Responsibilities of the CAC), Section 11.6.4(b) or Section 11.7.8 (Royalty Reporting) (or, if Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election) or its Co-Promotion Option pursuant to Section 9.2.1 (Exercise of Co-Promotion Right, as set forth in Article 9 (Profit Share Election&#59; Co-Promotion Right) or Section 10.4.2 (Responsibilities of the JCC)), as applicable, GSK shall have no obligation to provide any information to Mersana with respect to any Commercialization activities conducted by or on behalf of GSK or any of its Affiliates or Sublicensees with respect to the Licensed Products in the Territory.</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ARTICLE 9<br>PROFIT SHARE ELECTION&#59; CO-PROMOTION RIGHT</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.1&#160;&#160;&#160;&#160;Profit Share Election</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.1.1&#160;&#160;&#160;&#160;Exercise of Profit Share Election</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to the terms of this Agreement, including this Article 9 (Profit Share Election&#59; Co-Promotion Right), Mersana shall have the right to elect to share the Pre-Tax Profit or Loss for the Licensed Products in the Shared Territory (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Profit Share Election</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  If GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, &#91;**&#93; following &#91;**&#93;, GSK shall prepare, and provide to Mersana, the following&#58; (a) &#91;**&#93;&#59; (b) an update to the Commercialization Framework&#59;  (c) a &#91;**&#93; budget of anticipated costs expected to be incurred in connection with Commercialization activities to be conducted by or on behalf of GSK or any of its Affiliates in the U.S. during </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-72-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">the current &#91;**&#93; (broken down by &#91;**&#93;)&#59; and (d) &#91;**&#93; ((c) and (d), collectively, the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Shared Territory Commercialization Estimates</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), in each case ((a)-(d)), to the extent (i) in GSK&#8217;s Control and possession (or reasonably available to GSK) without requiring GSK (or any of its Affiliates) to perform any additional activities or analysis at the relevant time and (ii) GSK is permitted to share such information with Mersana under Applicable Law or its agreements with Third Parties (collectively, the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Option Package</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  Mersana may exercise the Profit Share Election by delivery of written notice to GSK (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Profit Share Election Notice</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) at any time during the &#91;**&#93;-period following Mersana&#8217;s receipt of the Mersana Option Package (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Exercise Period</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  In addition to the Mersana Option Package, GSK shall, during the Mersana Exercise Period, use commercially reasonable efforts to respond to Mersana&#8217;s reasonable questions regarding the Mersana Option Package, to the extent that the answers thereto are known to GSK at the time of the query and GSK is permitted to share such information under Applicable Law and its agreements with Third Parties.  Upon Mersana&#8217;s reasonable request, GSK agrees to &#91;**&#93; to discuss any follow-up concerns, to be scheduled at a mutually agreeable date and time.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.1.2&#160;&#160;&#160;&#160;Effect of Profit Share Election</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If Mersana delivers the Profit Share Election Notice prior to the expiration of the Mersana Exercise Period pursuant to Section 9.1.1 (Exercise of Profit Share Election), then, from and after GSK&#8217;s receipt of such notice (such date, the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Profit Share Start Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), (a)  subject to Section 11.5.5(c), the Parties shall share the Pre-Tax Profit or Loss in the Shared Territory in accordance with Section 11.5 (Pre-Tax Profit or Loss Sharing)&#59; (b) the JCC and Financial Working Group shall discuss the &#91;**&#93; budget included in the Shared Territory Commercialization Estimates provided by GSK pursuant to Section 9.1.1 (Exercise of Profit Share Election), and GSK shall reasonably consider any comments Mersana may have with respect thereto, and, following such discussion and any amendments resulting therefrom, such &#91;**&#93; budget shall automatically be deemed the initial binding budget for Commercialization activities to be conducted by or on behalf of GSK or any of its Affiliates (or, if Mersana also exercises its Co-Promotion Right pursuant to Section 9.2.1 (Exercise of Co-Promotion Right), any Detailing activities by the Parties under the Detailing Plan) with respect to the Licensed Products in the Shared Territory for such &#91;**&#93; (such budget, and any subsequent Updates provided pursuant to this Section 9.1.2 (Effect of Profit Share Election), the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Shared Territory Commercialization Budget</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;)&#59; and (c) the JCC and Financial Working Group shall discuss the &#91;**&#93; forecasted budget included in the Shared Territory Commercialization Estimates provided by GSK pursuant to Section 9.1.1 (Exercise of Profit Share Election), and GSK shall reasonably consider any comments Mersana may have with respect thereto, and, following such discussion and any amendments resulting therefrom, such &#91;**&#93; forecasted budget shall automatically be deemed the initial non-binding forecast for Commercialization activities to be conducted by or on behalf of GSK or any of its Affiliates (or, if Mersana also exercises its Co-Promotion Right pursuant to Section 9.2.1 (Exercise of Co-Promotion Right, any Detailing activities by the Parties under the Detailing Plan) for the &#91;**&#93; period following the &#91;**&#93; covered by the Shared Territory Commercialization Budget (such forecast, and any subsequent Updates provided pursuant to this Section 9.1.2 (Effect of Profit Share Election), the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Shared Territory Commercialization Forecast</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  On &#91;**&#93; basis in accordance with GSK&#8217;s internal timelines and </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-73-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">procedures for updating commercialization budgets, following discussion at the JCC and Financial Working Group (following which GSK shall reasonably consider any comments Mersana may have), GSK shall Update the Shared Territory Commercialization Budget and the Shared Territory Commercialization Forecast and deliver such Updates to the JCC and the Financial Working Group.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.2&#160;&#160;&#160;&#160;Co-Promotion Right</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.2.1&#160;&#160;&#160;&#160;Exercise of Co-Promotion Right</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to the terms of this Agreement, including the remainder of this Section 9.2 (Co-Promotion Right) and Section&#160;9.3 (Termination of Co-Promotion Right), if Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), Mersana shall also have the right to elect to co-Detail the Licensed Products with GSK in the Shared Territory in accordance with this Section 9.2 (Co-Promotion Right) (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Co-Promotion Right</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  Mersana may exercise the Co-Promotion Right at any time until the expiration of the Mersana Exercise Period by delivery of written notice to GSK (such notice, the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Co-Promotion Exercise Notice</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; and the date on which Mersana delivers such notice to GSK, the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Co-Promotion Exercise Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;))&#59; provided that, if Mersana exercises its Co-Promotion Right&#58; (a) the Co-Promotion Exercise Notice shall be delivered to GSK together with the Profit Share Election Notice (for clarity, Mersana may not exercise its Co-Promotion Right pursuant to this Section 9.2.1 (Exercise Co-Promotion Right) unless Mersana also exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), but Mersana may exercise its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election) without also exercising its Co-Promotion Right pursuant to this Section 9.2.1 (Exercise of Co-Promotion Right))&#59; and (b) the Co-Promotion Exercise Notice shall also include the percentage of Details that Mersana desires to perform under the Detailing Plan, which shall be at least &#91;**&#93; percent (&#91;**&#93;%) but not more than &#91;**&#93; percent (&#91;**&#93;%) of the total Details to be performed by the Parties under the Detailing Plan (such percentage, the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Selected Detailing Participation Level</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.2.2&#160;&#160;&#160;&#160;Detailing Plan</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If Mersana exercises its Co-Promotion Right in accordance with Section 9.2.1 (Exercise of Co-Promotion Right) prior to the expiration of the Mersana Exercise Term, then, subject to Section 9.3 (Termination of Co-Promotion Right), promptly following the Co-Promotion Exercise Date and the formation of the JCC pursuant to Section 10.4.1 (Establishment of JCC), the JCC shall discuss, agree and prepare a recommendation for a comprehensive plan setting forth, as between the Parties, their respective Detailing responsibilities, the allocation of Detail opportunities and target healthcare professionals and their respective Detail positioning, in each case, for the Licensed Products in the Shared Territory (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Detailing Plan</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;)&#59; provided that (a) unless otherwise mutually agreed by the Parties, the Detailing Plan shall provide that Mersana shall be responsible for conducting Details consistent with the Selected Detailing Participation Level as designated in the Co-Promotion Exercise Notice&#59; and (b) the allocation of Detailing opportunities under the Detailing Plan shall be mutually agreed, based in part on the Selected Detailing Participation Level, and ensuring that Detailing opportunities are distributed reasonably and equitably between the Parties, taking into account all relevant factors, including resources and </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-74-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">capabilities in specific geographies, centers of excellence, and prescriber opportunities.  Following the JCC&#8217;s preparation and agreement on their recommendation for the initial Detailing Plan, the JCC will provide such recommendation to the JSC to review, discuss and determine whether to approve such proposed initial Detailing Plan.  From time to time, during the Co-Promotion Term, either Party shall have the right to propose to the JCC Updates or amendments to the Detailing Plan and the JCC shall discuss, agree and prepare a recommendation with respect to any such proposed Update or amendment to the Detailing Plan and, in turn, provide such recommendation to the JSC to review, discuss and determine whether to approve such proposed Update or amendment to the Detailing Plan.  For the avoidance of doubt, the initial Detailing Plan (or any subsequent Update or amendment thereto) shall only become effective upon approval thereof by the JSC.  Any such Updates or amendments to the Detailing Plan may be memorialized in the JCC and JSC meeting minutes until the next &#91;**&#93; Update to the Detailing Plan, at which time such Updates or amendments will be added to the Updated Detailing Plan.  Notwithstanding anything in this Agreement to the contrary, except as otherwise agreed by the Parties, Mersana shall not have the right to perform any of its obligations under the Detailing Plan via any Third Party subcontractor (including any contract sales organization).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.2.3&#160;&#160;&#160;&#160;Detailing Reports</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If Mersana exercises its Co-Promotion Right in accordance with Section 9.2.1 (Exercise of Co-Promotion Right), then, within &#91;**&#93; following the end of each &#91;**&#93; occurring during the Co-Promotion Term following the approval of the initial Detailing Plan by the JSC pursuant to Section 9.2.2 (Detailing Plan), each Party shall prepare and deliver to the JCC a written report summarizing, in a format and with a level of detail to be agreed by the JCC, the material Detailing activities conducted by or on behalf of such Party with respect to the Licensed Products under the Detailing Plan in the Shared Territory during such &#91;**&#93;, including identifying any issues or circumstances of which it is aware that may prevent or adversely affect in a material manner its future performance of activities assigned to it under the then-current Detailing Plan or otherwise materially adversely affect the Exploitation of the Licensed Compound or any Licensed Product (each, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Detailing Report</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.2.4&#160;&#160;&#160;&#160;Marketing Messaging Participation</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If Mersana exercises its Co-Promotion Right in accordance with Section 9.2.1 (Exercise of Co-Promotion Right) then, subject to Section 9.3 (Termination of Co-Promotion Right), Mersana shall have the right to participate in the following activities on an ongoing basis (if applicable) during the Co-Promotion Term through the JSC (except as provided in clause (c) of this Section 9.2.4 (Marketing Messaging Participation)&#58; &#91;**&#93;, (i) following the creation of the same by GSK or its Affiliates in the normal course of GSK&#8217;s internal business operations, (ii)  to the extent solely related to the Licensed Product in the Shared Territory and (iii) to the extent that GSK is permitted to share such information under Applicable Law or its agreements with Third Parties.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.3&#160;&#160;&#160;&#160;Termination of Co-Promotion Right</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.3.1&#160;&#160;&#160;&#160;Notice</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-75-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;Without limiting any other rights and remedies either Party may have under this Agreement, or at law or in equity, if, in connection with its conduct of its obligations under the Detailing Plan, the other Party materially breaches (i) its obligations under Section 9.4 (Compliance) or Section 9.5 (Marketing) to comply with any Applicable Laws (including the Anti-Kickback Statute (42 U.S.C. &#167; 1320a-7b et seq.)), Guidelines or USPPs governing off-label promotion of pharmaceutical products in the Shared Territory or (ii) certain key performance parameters to be mutually agreed by the Parties in the Detailing Plan, then such Party will have the right to provide written notice to such other Party of the occurrence of any such event, which notice will expressly reference this Section 9.3.1 (Notice) and reasonably describe the alleged material breach  and state such Party&#8217;s intent to terminate Mersana&#8217;s Co-Promotion Right under this Agreement if such breach is not cured or remediated in all material respects in accordance with this Section&#160;9.3 (Termination of Co-Promotion Right).</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;If Mersana undergoes a Change of Control as described in Section 19.3.4, then GSK will have the right to provide written notice to Mersana stating GSK&#8217;s intent to terminate the Co-Promotion Right under this Agreement pursuant to Section 9.3.2(b).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.3.2&#160;&#160;&#160;&#160;Termination for Non-Compliance with Applicable Law or Change of Control</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;With respect to any material breach described in Section 9.3.1(a)(i), the non-breaching Party may terminate Mersana&#8217;s Co-Promotion Right in the Shared Territory immediately upon delivery of the notice to the breaching Party pursuant to Section 9.3.1 (Notice).</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;If Mersana undergoes a Change of Control as described in Section 19.3.4, and &#91;**&#93;, then GSK shall have the right to terminate the Co-Promotion Right immediately upon delivery of the notice to Mersana pursuant to Section 9.3.1(b), which notice must be provided within &#91;**&#93; after Mersana notifies GSK of such Change of Control pursuant to Section 19.3.1.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.3.3&#160;&#160;&#160;&#160;Termination for Failure to Perform Detailing Obligations</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  With respect to any material breach described in Section 9.3.1(a)(ii), if the breaching Party fails to cure or remediate such material breach in all material respects within &#91;**&#93; following delivery of the notice to the breaching Party pursuant to Section 9.3.1 (Notice), the non-breaching Party may terminate Mersana&#8217;s Co-Promotion Right in the Shared Territory on written notice&#59; provided, however, that, promptly following delivery of such notice, the Parties shall discuss in good faith and agree on a remediation plan to resolve any such failure to perform.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.3.4&#160;&#160;&#160;&#160;Effects of Termination of Co-Promotion Rights</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;If Mersana&#8217;s Co-Promotion Right in the Shared Territory has terminated pursuant to this Section 9.3 (Termination of Co-Promotion Right) or Section 19.3 (Change of Control), then, notwithstanding any provision to the contrary set forth in this Agreement, the following </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-76-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">effects of such termination will apply beginning on the applicable effective date of the termination of Mersana&#8217;s Co-Promotion Right in the Shared Territory as set forth in Section 9.3.2 (Termination for Non-Compliance with Applicable Law or Change of Control) or Section 9.3.3 (Termination for Failure to Perform Detailing Obligations), as applicable (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Co-Promotion End Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;)&#58; (i) the Co-Promotion Term shall &#91;**&#93; expire&#59; (ii) subject to Section 11.5 (Pre-Tax Profit or Loss Sharing), GSK shall have sole responsibility for all Commercialization of the Licensed Compound and all Licensed Products throughout the Territory (including all Detailing activities with respect thereto) in accordance with Section 8.1 (General)&#59; (iii) GSK shall have no further obligation to provide any Updates to the Detailing Plan or Detailing Budget or otherwise deliver any additional reporting or information with respect to the Detailing Plan, including pursuant to Section 9.2 (Co-Promotion Right), including any rights under Section 9.2.4 (Marketing Messaging Participation)&#59; (iv) Mersana shall &#91;**&#93; cease conducting all Detailing of Licensed Products in the Shared Territory and any other activities under the Detailing Plan (except as otherwise directed by GSK, in its sole discretion in connection with any wind-down process)&#59; and (v) Mersana shall (and shall ensure that all of its Sales Representatives personnel) return or destroy (at GSK&#8217;s direction) all Marketing Materials (including Promotional Materials) for the Licensed Products in the Territory or any other Confidential Information of GSK related to the Detailing activities in Mersana&#8217;s (or any such Sales Representative&#8217;s) possession.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;Notwithstanding anything to the contrary in this Agreement, in the event of a Dispute regarding the existence of any breach by Mersana described in Section 9.3.1(a)(i), Mersana shall cease all Detailing activities in the Shared Territory, and Mersana&#8217;s Co-Promotion Right (together with the license grant to Mersana under Section 4.2(c)) shall be suspended, until such time as the dispute is finally resolved pursuant to Article 18 (Dispute Resolution).  If such Dispute is finally resolved in Mersana&#8217;s favor in accordance with Article 18 (Dispute Resolution) &#91;**&#93;, then, &#91;**&#93;, such Commercial FTE Costs shall be included as Total Sales Representatives Costs shared by the Parties as part of the Pre-Tax Profit or Loss pursuant to Section 11.5 (Pre-Tax Profit or Loss Sharing).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.4&#160;&#160;&#160;&#160;Compliance</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If Mersana exercises its Co-Promotion Right in accordance with Section&#160;9.2.1 (Exercise of Co-Promotion Right) prior to the expiration of the Mersana Exercise Term, then, subject to Section 9.3 (Termination of Co-Promotion Right), the terms of this Section 9.4 (Compliance) shall apply.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.4.1&#160;&#160;&#160;&#160;Establishment of Compliance Program</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The compliance officers (or equivalent personnel) from each Party with responsibility for Commercialization of such Party&#8217;s products (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Compliance Officers</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) will meet to align on a compliance program applicable to the Licensed Products in the Shared Territory that includes the concepts set forth in this Section 9.4 (Compliance) along with the requirement to perform regular risk assessments relating to the Detailing activities undertaken by the applicable Party in the Shared Territory pursuant to the Detailing Plan (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Compliance </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-77-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Program</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  The Compliance Program will be presented to the JCC for review and discussion.  Each Party will ensure that it will perform, and will ensure that each of its Affiliates (and, with respect to GSK, its Sublicensees, and subcontractors, as applicable) perform, all Detailing activities in a professional and ethical business manner and in compliance with the Compliance Program and the Approved Labeling and each Party will provide appropriate training to its employees, Sales Representatives, Affiliates (or, with respect to GSK, its Sublicensees and subcontractors) on the foregoing, except that GSK will provide such training to Mersana&#8217;s employees, Sales Representatives and Affiliates to the extent specified in this Article 9 (Profit Share Election&#59; Co-Promotion Right).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.4.2&#160;&#160;&#160;&#160;Compliance Resourcing</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  In order to ensure adherence to the Compliance Program across all Detailing activities undertaken in the Shared Territory pursuant to the Detailing Plan, each Party will maintain resources sufficient to conduct at least the following activities&#58; &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.4.3&#160;&#160;&#160;&#160;Applicable Laws and Guidelines</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Each Party shall conduct its Detailing activities undertaken in the Shared Territory pursuant to the Detailing Plan in accordance with the requirements of this Agreement, Applicable Laws and Guidelines and shall cooperate with one another in any efforts toward ensuring that marketing and promotional practices in respect of the Licensed Products meet the standards required by&#58; (a) Applicable Laws&#59; and (b) applicable guidelines concerning the advertising and promotion of prescription drug products, including (i) the Office of the Inspector General&#8217;s Compliance Guidance Program, (ii) the American Medical Association Guidelines on Gifts to Physicians, (iii) the Pharmaceutical Research and Manufacturers of America&#8217;s (A) Code on Interactions with Healthcare Professionals and (B) Principles on Conduct of Clinical Trials and Communication of Clinical Trial Results, and (iv) the standards set forth by the Accreditation Council for Continuing Medical Education relating to educating the medical community in the United States, in each case, to the extent applicable to the Detailing activities hereunder and as may be amended or supplemented from time to time (such guidelines, the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Guidelines</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  In addition, each Party shall obtain and maintain all licenses, permits, approvals and other authorizations applicable to it to enable it to perform its respective Detailing obligations hereunder.  The Parties shall cooperate in good faith to update their obligations under this Section 9.4 (Compliance) from time to time to reflect any changes in any of the foregoing (a) &#8211; (b).  Each of the Parties agrees and acknowledges that it shall comply, and shall ensure that its applicable Affiliates, (or, in the case of GSK, its Third Party subcontractors, as applicable), and its and their respective employees, officers, directors and consultants comply, with the applicable requirements of this Section 9.4.3 (Applicable Laws and Guidelines).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.4.4&#160;&#160;&#160;&#160;Business Practices</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The Parties shall perform all of Detailing activities undertaken in the Shared Territory pursuant to the Detailing Plan in accordance with GSK&#8217;s policies regarding the same, known as of the Effective Date as the US Practices Policies, along with any updates thereto, in each case that are provided to Mersana by GSK sufficiently in advance for Mersana to have a reasonable opportunity to implement them (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">USPPs</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;)&#59; provided that, with respect to updates to the USPPs, Mersana shall give effect to any updates to the USPPs as soon as reasonably practicable following receipt of </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-78-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">such updates from GSK.  Notwithstanding anything to the contrary in this Agreement, neither Party nor any of its Affiliates shall be required to take, or shall be deemed in breach of this Agreement for not taking, any action that is not in compliance with such Party&#8217;s Internal Policies (so long as such action is still compliant with Applicable Laws and Guidelines) or that such Party reasonably believes is not in compliance with Applicable Laws, Guidelines or the USPPs.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.4.5&#160;&#160;&#160;&#160;Reporting</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Each Party shall be responsible for calculating, tracking and reporting transfers of value initiated and controlled by its employees or contractors pursuant to its respective obligations under the requirements of Section 6002 (Transparency Reports and Reporting of Physician Ownership and Investment Interest) of the Patient Protection and Affordable Care Act, commonly referred to as the &#8220;Sunshine Act&#8221;, and applicable state marketing reporting laws.  Subject to Applicable Laws and Guidelines, the value reported to the Centers for Medicare &#38; Medicaid Services shall be the amount expended by the controlling Party, irrespective of the division of or reconciliation of expenses between the Parties.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.4.6&#160;&#160;&#160;&#160;Cooperation</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  At the request of either Party, the Parties&#8217; Compliance Officers will convene for purposes of discussing the Compliance Program and resourcing and to share best practices, and if such discussions result in modifications to the Compliance Program, then such modifications shall be presented to the JCC for review and discussion in accordance with Section 9.4.1 (Establishment of Compliance Program).  Notwithstanding the foregoing, if either Party becomes aware of an allegation of a significant violation of Applicable Laws or Guidelines or USPPs, such Party shall promptly investigate and timely notify the other Party&#8217;s Compliance Officer and General Counsel of the commencement of the investigation.  If the investigation is conducted in accordance with the attorney-client privilege, then such notification shall be made pursuant to a joint-defense agreement in order to maintain all attorney-client privilege protections.  Such notification shall occur within &#91;**&#93; following the applicable Party becoming aware of an allegation of such a violation.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.4.7&#160;&#160;&#160;&#160;Audit and Monitoring Rights</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  GSK shall have the following rights with respect to Mersana&#8217;s performance of Detailing activities undertaken in the Shared Territory pursuant to the Detailing Plan&#58;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;GSK or its duly authorized Third Party auditor shall, upon &#91;**&#93; notice and no more frequently than &#91;**&#93;, have the right during normal business hours at a time to be agreed by the Parties during the Term and for a period of &#91;**&#93; thereafter for any reason, to examine and copy such books and records and all other documents and materials in the possession of or under the control of Mersana relating to the conduct of all Detailing activities undertaken by Mersana in the Shared Territory pursuant to the Detailing Plan under this Agreement.  GSK or its third-party auditor shall have access to &#91;**&#93; with respect to the conduct of such Detailing activities under of this Agreement, shall have access to all applicable necessary records and &#91;**&#93;.  GSK&#8217;s costs for any such on-site audit shall be borne by GSK.  Notwithstanding the foregoing, where GSK has a good faith belief that a violation of the Compliance Program has occurred or will occur if appropriate actions </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-79-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">are not taken then GSK or its duly authorized third-party auditor may request an audit, at a time mutually agreed by the Parties, with only &#91;**&#93; notice regardless of the timing or occurrence of any previous audit.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;GSK shall have the right to monitor Sales Representatives personnel of Mersana in the field to assess, </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">inter alia</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, compliance with Applicable Laws, Guidelines and USPPs and to identify gaps or weaknesses in knowledge or application of Applicable Laws, Guidelines and USPPs to the conduct of Detailing (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Field Monitoring</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  Such Field Monitoring shall be conducted on regular intervals as agreed by the Parties, but no more frequently than &#91;**&#93;, and shall be at GSK&#8217;s cost.  Notwithstanding the foregoing, where GSK has a good faith belief that a violation of the Compliance Program has occurred or will occur if appropriate actions are not taken, then GSK may request to conduct Field Monitoring outside of the annual assessments, at a time mutually agreed by the Parties, on only &#91;**&#93; notice regardless of the timing or occurrence of any previous Field Monitoring session.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;Any and all reports from the audits set forth in clause (a) above or from the Field Monitoring sessions set forth in clause (b) above shall be shared with Mersana and discussed by the Compliance Officers as set forth in Section 9.4.6 (Cooperation).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.5&#160;&#160;&#160;&#160;Marketing</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If Mersana exercises its Co-Promotion Right in accordance with Section 9.2.1 (Exercise of Co-Promotion Right) prior to the expiration of the Mersana Exercise Term, then, subject to Section 9.3 (Termination of Co-Promotion Right), the terms of this Section&#160;9.5 (Marketing) shall apply.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.5.1&#160;&#160;&#160;&#160;Advertising and Promotional Materials</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  As between the Parties, GSK shall have the sole responsibility for the preparation and production of all Marketing Materials (including Promotional Materials) for the Licensed Products in the Shared Territory, GSK will be solely responsible for legal and regulatory review of all such Marketing Materials through GSK&#8217;s standard copy approval process and submission of materials to applicable Regulatory Authorities for comments or approval as required.  GSK shall own all rights, title and interests in and to any and all such Marketing Materials (including Promotional Materials).  Neither Party shall use any materials, other than the Marketing Materials (including Promotional Materials) that have undergone GSK&#8217;s copy approval process for use, in connection with the Detailing of the Licensed Products under this Agreement.  GSK shall be responsible for providing and shipping to Mersana all Marketing Materials (including Promotional Materials) in quantities necessary for Mersana to perform its activities under the Detailing Plan.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.5.2&#160;&#160;&#160;&#160;Sales Representatives</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Each Party shall have sole responsibility for all costs and expenses in connection with its own Sales Representatives and its related management, including salaries, travel expenses and other expenses, credentialing, licensing, providing benefits, deducting federal, state and local payroll taxes, Federal Insurance Contributions Act contributions, Federal Unemployment Insurance, State Unemployment Insurance and any similar taxes and paying workers&#8217; compensation premiums, unemployment insurance contributions and any other payments required by Applicable Laws to be </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-80-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">made on behalf of its employees.  Nothing in this Agreement shall be construed to conclude that any of a Party&#8217;s Sales Representatives or any other agents or employees of such Party are agents or employees of the other Party or subject to such other Party&#8217;s direction and control.  Each Party shall have sole authority over the terms and conditions of employment of its own Sales Representatives, including their selection, management, compensation (provided that the basis on which Sales Representatives are compensated shall be aligned between the Parties to ensure compliance with the USPPs) and discharge.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.5.3&#160;&#160;&#160;&#160;Product Specific Training</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  GSK shall be responsible for preparing the initial Licensed Product training programs and materials (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Product Training Materials</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) for both its own Sales Representatives as well as Mersana&#8217;s Sales Representatives, and shall conduct such training programs for all Sales Representatives prior to the launch of the Licensed Product&#59; provided that, thereafter each Party shall be responsible for, and shall conduct, training programs using the most up-to-date Product Training Materials for its own Sales Representatives who will participate in Detailing the Licensed Product to ensure a consistent, focused promotional strategy between the Parties that is consistent with the Approved Labeling for the applicable Licensed Product.  GSK shall have the right to update the Product Training Materials in its reasonable discretion, including in response to any areas identified through internal monitoring of activities by GSK for enhanced or refreshed training.  For the avoidance of doubt, the Product Training Materials will include training on the USPPs.  GSK shall own all rights in the Product Training Materials in all formats (</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">e.g.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, print, video, audio, digital, computer) including all applicable copyrights, trademarks, program names, domain names and Internet sites.  Each Party shall be responsible for the performance of its own Sales Representatives.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">9.6&#160;&#160;&#160;&#160;Product Marks</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  GSK &#91;**&#93; to conduct its obligations under the Detailing Plan in accordance with this Agreement.  </font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ARTICLE 10<br>MANAGEMENT OF THE COLLABORATION</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.1&#160;&#160;&#160;&#160;Joint Steering Committee</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.1.1&#160;&#160;&#160;&#160;Establishment of JSC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, no later than &#91;**&#93; following the License Effective Date, the Parties shall establish a Joint Steering Committee (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">JSC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), which shall be constituted in accordance with Section 10.7 (Membership, Meetings and Meeting Minutes).  The JSC shall operate in accordance with the provisions of Section 10.7 (Membership, Meetings and Meeting Minutes) and Section 10.8 (Decision-Making).  At its meetings, the JSC shall review, discuss and determine whether to approve (if applicable), the matters described in Section 10.1.2 (Responsibilities of the JSC) or, subject to Section 10.8 (Decision-Making), such other matters as are reasonably requested by either Party.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.1.2&#160;&#160;&#160;&#160;Responsibilities of the JSC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The JSC shall perform the following functions&#58;</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-81-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;oversee and guide the overall strategic direction of the Collaboration (but, for clarity, without modifying or limiting the rights or obligations of either Party as otherwise set forth herein)&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;establish, as appropriate, additional Subcommittees or working groups responsible for managing specific aspects of the Collaboration as contemplated herein&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;resolve issues or Disputes elevated to it by the JDC, JMC, JCC, Financial Working Group, or any other Subcommittee that the JSC may establish pursuant to Section 10.6 (Other Subcommittees)&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(d)&#160;&#160;&#160;&#160;review, discuss and determine whether to approve the Joint Development Plan, including the Joint Development Budget and Joint Development Forecast and all Updates and amendments thereto, as submitted by the JDC pursuant to Section 5.2.2(d)&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(e)&#160;&#160;&#160;&#160;if Mersana has exercised its Profit Share Election pursuant to Section&#160;9.1.1 (Exercise of Profit Share Election), review and discuss the Shared Territory Commercialization Budget&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(f)&#160;&#160;&#160;&#160;if Mersana has exercised its Co-Promotion Right pursuant to Section&#160;9.2.1 (Exercise of Co-Promotion Right), subject to Section 9.3 (Termination of Co-Promotion Right), review, discuss and determine whether to approve the Detailing Plan and all Updates and amendments thereto, as submitted by the JCC, as described in Section 9.2.2 (Detailing Plan)&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(g)&#160;&#160;&#160;&#160;coordinate with the Financial Working Group, JDC, JMC, JCC or any other applicable Subcommittee, as appropriate, with respect to the approval of any Development Excess Costs or Commercialization Excess Costs, as applicable&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(h)&#160;&#160;&#160;&#160;perform such other functions as are assigned to the JSC in this Agreement, or otherwise agreed by the Parties in writing.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.1.3&#160;&#160;&#160;&#160;Term of the JSC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The JSC shall meet in accordance with Section 10.7.2 (Meetings) until the disbandment of the last to disband of the Financial Working Group, JDC, JMC or JCC, as applicable.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.2&#160;&#160;&#160;&#160;Joint Development Committee</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.2.1&#160;&#160;&#160;&#160;Establishment of JDC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, no later than &#91;**&#93; following the License Effective Date, the Parties shall establish a joint development committee (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">JDC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) to oversee the conduct of, and coordinate the Parties&#8217; activities with respect to, the Development of the Licensed Compound and Licensed Products under the Collaboration.  The JDC shall operate in accordance with the provisions of Section 10.7 (Membership, Meetings and Meeting Minutes) and Section 10.8 (Decision-Making).  At its meetings, the JDC shall review, discuss and determine whether to approve (if applicable), the matters described in Section 10.2.2 (Responsibilities of the JDC) or, subject to Section 10.8 (Decision-Making), </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-82-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">such other matters as are reasonably requested by either Party that are within the purview of the JDC.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.2.2&#160;&#160;&#160;&#160;Responsibilities of the JDC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The JDC shall perform the following functions for the Collaboration&#58;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;oversee, review, discuss and coordinate the conduct and progress of the Development activities (including Manufacturing-related Development activities) of the Licensed Compound and Licensed Products, as described in the Joint Development Plan (in accordance with the Joint Development Budget), as well as any identified issues or circumstances that may prevent or adversely affect in a material manner a Party&#8217;s future performance of activities assigned to it under the then-current Joint Development Plan&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;establish the initial Joint Development Plan, Joint Development Budget and Joint Development Forecast and submit the same to the JSC for approval&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;review, discuss, and propose modifications to, the Joint Development Plan, Joint Development Budget and Joint Development Forecast, and all Updates thereto, and submit the same to the JSC for approval, as described in Section 5.2.2(d)&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(d)&#160;&#160;&#160;&#160;review and discuss any New Registration Studies in accordance with Section 5.3.1 (New Registration Studies)&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(e)&#160;&#160;&#160;&#160;discuss and develop a remediation strategy for material deficiencies regarding animal care and welfare, as described in Section 5.2.9(f)&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(f)&#160;&#160;&#160;&#160;review the compliance plan submitted to the JDC pursuant to Section&#160;5.2.11 (R&#38;D Ethics &#38; Compliance) and agree to any modifications, and document the final agreed Development compliance plan in the JDC minutes&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(g)&#160;&#160;&#160;&#160;oversee the implementation of the Joint Development Plan, and monitor whether activities thereunder are performed in accordance with the timelines set forth therein and the terms set forth in Article 5 (Development)&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(h)&#160;&#160;&#160;&#160;review and discuss any Data or other information shared by GSK with the JDC pursuant to Article 5 (Development) with respect to any GSK Development Activities (including any updates provided regarding Independent Registration Studies)&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(i)&#160;&#160;&#160;&#160;coordinate with the Financial Working Group with respect to the reconciliation of Development Costs, and identify and discuss any Excess Development Costs and other budget overruns in consultation with the Financial Working Group, in accordance with Section 11.4 (Sharing of Development Costs)&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(j)&#160;&#160;&#160;&#160;review and discuss Development Reports&#59;</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-83-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(k)&#160;&#160;&#160;&#160;review and consult with the JMC and the Financial Working Group in connection with the Manufacturing activities for the Licensed Compound and the Licensed Products in accordance with Section 7.2 (Manufacturing Responsibilities), including CMC Development, supply chain strategy, establishment of Manufacturing sources, capacity, supply chains, Clinical Manufacturing and the Manufacturing Technology Transfer Plan, as applicable&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(l)&#160;&#160;&#160;&#160;prepare the Publication Strategy, and, with consultation from the Patent Liaisons, where applicable, review and approve such Publication Strategy, and update it from time to time, as described in Section&#160;12.4.2(a)&#59; and</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(m)&#160;&#160;&#160;&#160;perform such other functions as are specifically designated to the JDC in this Agreement, or as the Parties otherwise agree in writing are appropriate to further the purposes of this Agreement.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.2.3&#160;&#160;&#160;&#160;Term of the JDC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The JDC shall meet in accordance with Section 10.7.2 (Meetings) during the Development Term&#59; provided, however, that, if there are any Ongoing Shared Global Development Activities for which GSK and Mersana are continuing to share Development Costs under the Joint Development Budget following the Development Cost Share End Date, the JDC shall continue to meet until the completion of such Ongoing Shared Global Development Activities under the Joint Development Plan&#59; provided, further, that, notwithstanding anything to the contrary in this Agreement, following the Development Cost Share End Date&#58; (a) the JDC&#8217;s responsibilities and decision-making authority shall be limited to such Ongoing Shared Global Development Activities as and to the extent applicable&#59; and (b) the JDC shall have no oversight or decision-making authority with respect to any Development activities conducted by or on behalf of GSK (or any of its Affiliates, Sublicensees or subcontractors) with respect to the Licensed Compound or any Licensed Product, other than such Ongoing Shared Global Development Activities.  Except as set forth above, the JDC shall disband upon the expiration of the Development Term (or until such time as the Parties mutually agree to dissolve the JDC, if earlier).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.3&#160;&#160;&#160;&#160;Joint Manufacturing Committee</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.3.1&#160;&#160;&#160;&#160;Establishment of JMC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, no later than &#91;**&#93; following the License Effective Date, the Parties shall establish a joint manufacturing committee (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">JMC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) to oversee the conduct of, and coordinate the Parties&#8217; activities with respect to, the Manufacturing of the Licensed Compound and Licensed Products under the Collaboration.  The JMC shall operate in accordance with the provisions of Section 10.7 (Membership, Meetings and Meeting Minutes) and Section 10.8 (Decision-Making).  At its meetings, the JMC shall review, discuss and determine whether to approve (if applicable), the matters described in Section 10.3.2 (Responsibilities of the JMC) or, subject to Section 10.8 (Decision-Making), such other matters as are reasonably requested by either Party that are within the purview of the JMC.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-84-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.3.2&#160;&#160;&#160;&#160;Responsibilities of the JMC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The JMC shall perform the following functions for the Collaboration&#58;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;oversee, review, discuss and coordinate, in consultation with the JDC and the Financial Working Group, the conduct and progress of the Clinical Manufacturing and supply activities of the Licensed Compound and Licensed Products in accordance with Section 7.2 (Manufacturing Responsibilities), including CMC Development, supply chain strategy, establishment of Manufacturing sources, capacity and supply chains for Clinical Manufacturing&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;prepare, discuss and agree on the Manufacturing Tech Transfer Plan (including, in consultation with the Financial Working Group, the corresponding &#91;**&#93;) and all updates thereto, and submit its recommendation for the initial Manufacturing Tech Transfer Plan and all updates thereto, to the JSC for approval, as described in Section 7.3.1 (Manufacturing Tech Transfer Plan)&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;oversee the implementation of the Manufacturing Tech Transfer Plan, including transfer of Know-How set forth in the Manufacturing Plan, and monitor whether activities thereunder are performed in accordance with the Manufacturing Tech Transfer Plan (including any timelines set forth therein and, in consultation with the Financial Working Group, the corresponding &#91;**&#93;) and otherwise in accordance with Section 7.3 (Manufacturing Technology Transfer)&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(d)&#160;&#160;&#160;&#160;review and discuss, in consultation with the JDC, any Data and other information arising from the conduct of any CMC Development activities for the Licensed Compound and Licensed Products under the Joint Development Plan&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(e)&#160;&#160;&#160;&#160;review and discuss, in consultation with the JDC, any regulatory matters relating to Clinical Manufacturing activities for the Licensed Compound and Licensed Products undertaken pursuant to the Joint Development Plan and oversee the implementation of, and discuss progress regarding, the CMC (chemistry, manufacturing and controls) regulatory strategy set forth in the Joint Development Plan&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(f)&#160;&#160;&#160;&#160;review and discuss an &#91;**&#93; that will specify the allocation of Licensed Compound and Licensed Product &#91;**&#93; being Manufactured by or on behalf of either Party to (i) &#91;**&#93;, (ii) &#91;**&#93;, (iii) &#91;**&#93;, and (iv) &#91;**&#93;&#59; and </font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(g)&#160;&#160;&#160;&#160;perform such other functions as are specifically designated to the JMC in this Agreement, or as the Parties otherwise agree in writing are appropriate to further the purposes of this Agreement.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.3.3&#160;&#160;&#160;&#160;Term of the JMC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The JMC shall meet in accordance with Section 10.7.2 (Meetings) during the Development Term.  Following the expiration of the Development Term (or at such other time as the Parties mutually agree to dissolve the JMC, if earlier) the JMC shall disband.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.4&#160;&#160;&#160;&#160;Joint Commercialization Committee</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-85-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.4.1&#160;&#160;&#160;&#160;Establishment of JCC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), then within &#91;**&#93; following the Co-Promotion Exercise Date, the JSC will establish a joint commercialization committee (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">JCC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) with respect to the Parties&#8217; sharing of Pre-Tax Profit or Loss and, if Mersana exercises its Co-Promotion Right pursuant to Section 9.2.1 (Exercise of Co-Promotion Right), the Parties&#8217; shared Detailing activities for the Licensed Products in the Shared Territory.  The JCC will be composed of an equal number (to be agreed by the Parties) of commercial representatives from each Party.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.4.2&#160;&#160;&#160;&#160;Responsibilities of the JCC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The JCC shall perform the following functions&#58;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;regardless of whether Mersana exercises its Co-Promotion Right pursuant to Section 9.2.1 (Exercise of Co-Promotion Right), (i) review and discuss the Shared Territory Commercialization Budget and Shared Territory Commercialization Forecast and (ii) liaise with the Financial Working Group with respect to the calculation of the Pre-Tax Profit or Loss&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;solely if Mersana exercises its Co-Promotion Right pursuant to Section&#160;9.2.1 (Exercise of Co-Promotion Right)&#58;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(1)&#160;&#160;&#160;&#160;prepare, discuss and agree upon the Detailing Plan, and all Updates thereto, and recommend such Detailing Plan (and all such Updates) to the JSC to review, discuss, and determine whether to approve, as described in Section 9.2.2 (Detailing Plan)&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(2)&#160;&#160;&#160;&#160;review and discuss each Detailing Report delivered pursuant to Section 9.2.3 (Detail Reports)&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(3)&#160;&#160;&#160;&#160;review and discuss the Commercialization Framework and any updates thereto&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(4)&#160;&#160;&#160;&#160;review and discuss, or conduct (as applicable), the activities described in Section 9.2.4 (Marketing Messaging Participation)&#59; and</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(5)&#160;&#160;&#160;&#160;review and discuss the Compliance Program submitted to the JCC pursuant to Section 9.4.1 (Establishment of Compliance Program)&#59; and</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;perform such other functions as are specifically designated to the JCC in this Agreement, or as the Parties otherwise agree in writing are appropriate to further the purposes of this Agreement.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.4.3&#160;&#160;&#160;&#160;Term of the JCC</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The JCC shall meet in accordance with Section 10.7.2 (Meetings) during the Co-Promotion Term.  The JCC shall disband upon the expiration of the Co-Promotion Term (or until such time as the Parties mutually agree to dissolve the JCC, if earlier).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.5&#160;&#160;&#160;&#160;Financial Working Group</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, no later than &#91;**&#93; following the </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-86-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">License Effective Date, the Parties will establish a financial working group subcommittee (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Financial Working Group</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), which shall work with the JDC, the JCC, the JMC and the JSC, as applicable, and will be responsible for (a) reviewing and agreeing on the Joint Development Budget and Joint Development Forecast, and all Updates and amendments thereto, in coordination with the JDC (subject to JSC approval) pursuant to Section&#160;5.2.2(d)&#59; (b) reviewing and agreeing on the Manufacturing Tech Transfer &#91;**&#93; in coordination with the JMC (subject to JSC approval) pursuant to Section 7.3.1 (Manufacturing Tech Transfer Plan)&#59; (c) if Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), (i) reviewing the Shared Territory Commercialization Budget and the Shared Territory Commercialization Forecast, including all Updates and amendments thereto&#59; and (ii) establishing the FTE Rate with respect to Commercialization activities for Licensed Products in the Shared Territory&#59; (d) overseeing the operational aspects of all co-funding and payment activities under this Agreement, including as set forth in Article 11 (Financial Provisions)&#59; (e) discussing and agreeing (in consultation with the JDC, JCC and JMC, and subject to JSC approval) on the appropriate methodology for calculating any amounts payable pursuant to Section 7.4.1(a) or Section 7.4.1(b), as applicable&#59; and (f) such other functions as are specifically designated to the Financial Working Group in this Agreement, or as the Parties otherwise agree in writing are appropriate to further the purposes of this Agreement.  The Financial Working Group shall include individuals from each Party with reasonable expertise in the areas of accounting, cost allocation, budgeting and financial reporting.  The Parties shall determine the appropriate number of representatives of each Party that will constitute the Financial Working Group, which shall be an equal number, and the frequency of meetings thereof.  Each Party shall designate their respective initial representatives to the Financial Working Group to allow such Financial Working Group to begin organizing information for the initial meetings of the JDC and the JSC.  The Financial Working Group shall operate generally in accordance with the provisions of Section 10.7 (Membership, Meetings and Meeting Minutes).  The Financial Working Group shall meet in accordance with Section 10.7.2 (Meetings) until the later to occur of (i) the expiration of the Development Term, or (ii) if Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), until Mersana ceases to share in the Pre-Tax Profit or Loss with GSK, as applicable (or until such time as the Parties mutually agree to dissolve the Financial Working Group, if earlier)</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.6&#160;&#160;&#160;&#160;Other Subcommittees</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, from time to time during the Collaboration Term, the JSC may establish other subcommittees of the JSC to oversee particular projects or activities under this Agreement, and such subcommittees shall be constituted and have such responsibility as the JSC approves (each such subcommittee, along with each other subcommittee established hereunder, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Subcommittee</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;)).  The Subcommittees shall operate in accordance with the provisions of Section 10.7 (Membership, Meetings and Meeting Minutes).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.7&#160;&#160;&#160;&#160;Membership, Meetings and Meeting Minutes</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.7.1&#160;&#160;&#160;&#160;Membership</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Except as otherwise stated herein, each Committee shall be composed of &#91;**&#93; representatives (or such other equal number of representatives as the Parties may agree) from each of Mersana and GSK.  Either Party may replace its respective Committee representatives at any time with prior written notice to the other Party, provided that such replacement is of comparable authority and scope of functional responsibility within that Party&#8217;s organization as the person they are replacing.  Each Party&#8217;s representatives on each Committee shall be individuals suitable in seniority, </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-87-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">experience, and relevant decision-making authority to make decisions within the scope of the applicable Committee&#8217;s responsibilities&#59; provided that it is understood that such representatives may need to seek appropriate authority from the relevant Party with respect to certain matters.  For each Committee, each Party shall designate one of its representatives on such Committee to co-chair the meetings for such Committee (each, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Co-Chair</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  The Co-Chairs shall coordinate and prepare the agenda for, and ensure the orderly conduct of, the meetings of such Committee and solicit applicable agenda items from Committee members and provide an agenda, along with appropriate information, reasonably in advance of each meeting.  Each agenda shall include all items requested by either Co-Chair for inclusion therein.  If the Co-Chairs or another Committee member from either Party is unable to attend or participate in a meeting of such Committee, then the Party whose Co-Chair or member is unable to attend may designate a substitute co-chair or other representative for the meeting, provided that such substitute is of comparable authority and scope of functional responsibility within that Party&#8217;s organization as the person they are substituting.  The Alliance Managers shall assist the Co-Chairs of the JSC with respect to the foregoing activities, and attend all meetings of the JSC as non-voting members&#59; but attendance by the Alliance Manager does not count towards either Party&#8217;s representation on the JSC.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.7.2&#160;&#160;&#160;&#160;Meetings</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, following the establishment of the JSC pursuant to Section 10.1.1 (Establishment of the JSC), the JSC shall meet &#91;**&#93; (or more or less frequently as agreed by the Parties in writing) for the period as set forth in Section 10.1.3 (Term of the JSC).  JSC meetings may be called at other times to resolve Committee Deadlocks in accordance with Section 10.8.1 (Committee Decision-Making).  At least &#91;**&#93; will be in-person, unless the Parties agree to meet by an alternative mechanism (</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">e.g.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, telephone or videoconference).  With respect to the JDC, JMC, JCC, the Financial Working Group and each other Subcommittee (if any), following the establishment of such Subcommittee pursuant to this Article 10 (Management of the Collaboration), such Subcommittee shall meet at least &#91;**&#93;, or as more or less often as otherwise agreed by the Parties in writing.  Committee meetings may be conducted by telephone, videoconference or in person.  Any in-person Committee meetings shall be held on an alternating basis between Mersana&#8217;s and GSK&#8217;s facilities, unless otherwise agreed by the Parties in writing.  Each Party shall be responsible for its own expenses in attending such meetings and those expenses will not be included in Development Costs or Allowable Expenses hereunder.  As appropriate, each Committee may invite a reasonable number of non-voting employees, consultants, and scientific advisors to attend its meetings as nonvoting observers, provided that such invitees are bound by appropriate confidentiality and non-use obligations no less restrictive than those set forth in this Agreement.  Each Party may also call for special meetings of a Committee to discuss matters requested by such Party (to the extent within the purview of such Committee or as otherwise mutually agreed by the Parties).  The Alliance Managers shall provide the members of each Committee with no less than &#91;**&#93; notice of each regularly scheduled meeting and, to the extent reasonably practicable under the circumstances, no less than &#91;**&#93; notice of any special meetings of a Committee called by either Party.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-88-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.7.3&#160;&#160;&#160;&#160;Meeting Minutes</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Minutes will be kept of all Committee meetings.  Minutes will be sent to all members of the applicable Committee by e-mail for review within a reasonable period of time after each meeting.  The Alliance Managers will be responsible for taking and circulating minutes of each JSC meeting and, for all other Committees, the Co-Chairs will be responsible for taking and circulating minutes, in each case on an alternating basis for each meeting (commencing with the Alliance Manager of GSK and the Co-Chair of each Subcommittee designated by GSK).  If a Party&#8217;s Alliance Manager (or their designee) is not present at a JSC meeting and that Party is responsible for keeping minutes, such Party shall designate one of its JSC members to keep minutes.  Minutes shall record all action items and decisions of the applicable Committee.  The Committee shall formally accept the minutes of the previous Committee meeting at or before the next Committee meeting.  Minutes will be deemed approved unless any member of the Committee objects to the accuracy of such minutes by providing written notice to the other members of the Committee prior to the next meeting of such Committee.  Minutes shall list action items and shall designate any issues that need to be resolved by the JSC (or applicable escalation process as set forth in this Agreement).  In the event of any such objection to the minutes that is not resolved by agreement of the Parties, such minutes will be amended to reflect the details of such unresolved dispute.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.8&#160;&#160;&#160;&#160;Decision-Making</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.8.1&#160;&#160;&#160;&#160;Committee Decision Making</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Decisions of each Committee shall be made by unanimous vote, with each Party having one vote.  In order to make any decision, any Committee must have present (in person or via telephone or videoconference) at least one representative of each Party.  Except as otherwise expressly set forth in this Agreement, the phrase &#8220;determine,&#8221; &#8220;designate,&#8221; &#8220;agree upon,&#8221; &#8220;approve,&#8221; or &#8220;determine whether to approve&#8221; by the JSC, JDC, JMC, JCC, Financial Working Group, or any Subcommittee and similar phrases used in this Agreement will mean approval in accordance with this Section 10.8 (Decision Making), including the escalation and tie breaking provisions herein.  For the avoidance of doubt, matters that are specified in Section 10.1.2 (Responsibilities of the JSC), Section 10.2.2 (Responsibilities of the JDC), Section 10.3.2 (Responsibilities of the JMC), Section 10.4.2 (Responsibilities of the JCC) or Section 10.5 (Financial Working Group) to be reviewed and discussed (as opposed to reviewed, discussed, and approved) do not require any agreement or decision by the JSC, JDC, JMC, JCC, Financial Working Group, or any Subcommittee, as applicable, and are not subject to the voting and decision-making procedures set forth in this Section 10.8 (Decision Making).  Unless otherwise specified by the JSC, if the JDC, JMC, JCC, Financial Working Group or any other Subcommittee cannot or does not reach consensus with respect to a particular matter within the authority of such Subcommittee (a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Subcommittee Deadlock</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) after endeavoring for &#91;**&#93; to agree, such matter shall be referred to the JSC for discussion and attempted resolution.  If the JSC does not reach a decision with respect to a Subcommittee Deadlock, or if the JSC cannot or does not reach consensus with respect to any other matter within its authority, in each case, after endeavoring for &#91;**&#93; to agree, then such matter (a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Committee Deadlock</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) shall be decided in accordance with Section 10.8.2 (Resolution of Committee Deadlocks).</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-89-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.8.2&#160;&#160;&#160;&#160;Resolution of Committee Deadlocks</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Each Committee Deadlock may be submitted by either Party to the Senior Executives of both Parties.  The Senior Executives of each Party shall attempt to resolve such Committee Deadlock within &#91;**&#93; following submission.  If the Senior Executives cannot resolve the Committee Deadlock within such &#91;**&#93; period, then such Committee Deadlock shall be resolved as follows&#58;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;Neither Party will have final decision-making authority with respect to any Committee Deadlocks regarding &#91;**&#93;, which will require agreement of the Parties to make any change from the then-current </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">status quo</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;Except as set forth in Section 10.8.2(a) and subject to Section 10.8.3 (Day-to-Day Decision-Making Authority) and Section 10.8.4 (Limitation of Powers), GSK will have the right to make the final decision regarding &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.8.3&#160;&#160;&#160;&#160;Day-to-Day Decision-Making Authority</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Each Party shall have decision making authority with respect to the day-to-day operational and tactical activities of such Party (and such Party&#8217;s employees, agents and subcontractors) under this Agreement&#59; provided that such decisions are not inconsistent with the terms and conditions of this Agreement (including the Joint Development Plan, Joint Development Budget or Detailing Plan, as applicable) or the decisions and actions of the JSC, the JDC, the JMC, the JCC, Financial Working Group or any other Subcommittee, as applicable.  In addition, notwithstanding anything herein to the contrary, the Party that is the sponsor of a given Clinical Trial for a Licensed Product that is being conducted under the Joint Development Plan may, by giving written notice to the other Party, &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.8.4&#160;&#160;&#160;&#160;Limitation of Powers</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Each Committee will have only the powers as are specifically delegated to it under this Agreement.  The JSC is not a substitute for the rights of the Parties under this Agreement and is intended to coordinate and facilitate the activities of the Parties.  The JSC will not be involved with the day-to-day management of activities to be performed by a Party under this Agreement.  Matters explicitly reserved to the consent, approval or other decision-making authority of one or both Parties, as expressly provided in this Agreement, are outside the jurisdiction and authority of the JSC, including amendment, modification or waiver of compliance with the Agreement, which shall be made by the Parties only in accordance with Section 19.10 (Entire Agreement).  The JSC, the JDC, the JCC, the Financial Working Group, and the Subcommittees will not have the power, and GSK may not exercise its final decision-making authority pursuant to Section 10.8.2(b)&#58; (a) to resolve disputes arising out of the calculation or reconciliation of Development Costs or the Pre-Tax Profit or Loss, which, for clarity, shall be resolved in accordance with Section 11.14 (Financial Disputes) or Article 18 (Dispute Resolution), as applicable&#59; (b) to resolve Disputes arising out of the interpretation, or involving a breach or alleged breach, of this Agreement, which, for clarity, shall be resolved in accordance with Article 18 (Dispute Resolution)&#59; (c) to alter or amend the terms and conditions of this Agreement, or waive compliance with this Agreement&#59; (d) to act in a manner that negates any consent rights or other rights specifically allocated to a Party under this Agreement&#59; (e) to act in a manner that would require either Party to perform </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-90-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">any act that is inconsistent with any Applicable Law&#59; (f) to determine whether or not a Milestone Event has been achieved under this Agreement&#59; or (g) to determine whether any given Know-How or Patent qualifies as Platform-Specific Arising Know-How, a Platform-Specific Arising Patent, Product-Specific Arising Know-How, a Product-Specific Arising Patent, GSK Arising Technology, Mersana Arising Technology or Joint Arising Technology.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.9&#160;&#160;&#160;&#160;Alliance Managers</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Promptly following the Effective Date, each Party shall designate an individual to serve as the main point of contact for each Party to exchange information, facilitate communication and help coordinate the Parties&#8217; activities hereunder (each, an &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Alliance Manager</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  If GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, following the formation of the JSC pursuant to Section 10.1 (Joint Steering Committee), the Alliance Managers shall attend the meetings of the JSC and, for all other Committees formed pursuant to this Article 10 (Management of the Collaboration), the Alliance Managers may participate in meetings but are not required to participate&#59; provided that the Alliance Managers shall not be counted as members of any Committee (and shall not vote on matters discussed at any Committee meeting).  Each Party may change its designated Alliance Manager from time to time upon written notice to the other Party.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.10&#160;&#160;&#160;&#160;Patent Liaisons</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  No later than &#91;**&#93; following the Effective Date, the Parties shall each designate representative(s) to consult with the other Party&#8217;s representative(s) with respect to Patent prosecution, maintenance, enforcement and defense matters (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Patent Liaisons</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) as more fully described in this Section 10.10 (Patent Liaisons).  The Patent Liaisons shall discuss, at such times, places and frequencies as either Patent Liaison determines is necessary, material issues and provide input to each other regarding determination of whether any given Know-How or Patent qualifies as Platform-Specific Arising Know-How, a Platform-Specific Arising Patent, Product-Specific Arising Know-How, a Product-Specific Arising Patent, GSK Arising Technology, Mersana Arising Technology or Joint Arising Technology, and the prosecution, maintenance, enforcement or defense of Patents included in the GSK Prosecuted Patents, Mersana Product-Related Patents or Joint Arising Technology, as more fully described in Article 13 (Intellectual Property).  In addition, the Patent Liaisons shall be responsible for coordinating the implementation of each Party&#8217;s &#91;**&#93;, as applicable (the foregoing referred to herein as the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Patent Strategy</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;)&#59; provided, however, for clarity, all final decisions related to the prosecution, maintenance, enforcement or defense of any Patents included in the GSK Prosecuted Patents, Mersana Product-Related Patents or Joint Arising Technology shall be made by the Party with the right to control such prosecution, maintenance, enforcement or defense, as applicable, as set forth in Article 13 (Intellectual Property) and subject to the terms and conditions therein.  Any dispute regarding whether any given Know-How or Patent qualifies as Platform-Specific Arising Know-How, a Platform-Specific Arising Patent, Product-Specific Arising Know-How, a Product-Specific Arising Patent, GSK Arising Technology, Mersana Arising Technology or Joint Arising Technology shall be resolved pursuant to Article 18 (Dispute Resolution).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">10.11&#160;&#160;&#160;&#160;GSK Sole Decision-Making Authority</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  For the avoidance of doubt, except as otherwise expressly set forth in this Agreement (including Section 10.8.2 (Resolution of Committee Deadlocks) and Section 10.8.4 (Limitation of Powers)), as between the Parties, subject to the terms of this Agreement, GSK shall have sole decision-making authority with respect to any matter related to the Development, Manufacture, Commercialization and other Exploitation of the Licensed Compound and any Licensed Product in the Territory.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-91-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ARTICLE 11<br>FINANCIAL PROVISIONS</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.1&#160;&#160;&#160;&#160;Option Purchase Fee</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  In partial consideration of the Option granted to GSK under Section&#160;3.1 (Option), within ten (10) Business Days following the receipt of a valid invoice from Mersana in accordance with Section 11.9.2 (Invoicing), to be provided by Mersana on after the Effective Date, GSK shall pay to Mersana a non-creditable and non-refundable one-time payment of One Hundred Million Dollars ($100,000,000).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.2&#160;&#160;&#160;&#160;Near Term Milestones</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  In partial consideration of the Option granted to GSK under Section 3.1 (Option), GSK shall pay to Mersana, in accordance with the terms of this Section 11.2 (Near Term Milestones), the following one-time, non-refundable, non-creditable milestone payments (each, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Near Term Milestone Payment</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) upon the first achievement of the corresponding milestone events with respect to the Licensed Products (each, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Near Term Milestone Event</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) as set forth below&#58;</font></div><div style="padding-left:36pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:92.307%"><tr><td style="width:1.0%"></td><td style="width:48.900%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:48.900%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">Near Term Milestone <br>Events</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">Near Term Milestone <br>Payment</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">$&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-bottom:0.5pt solid #000000;border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-bottom:0.5pt solid #000000;border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">$&#91;**&#93;</font></td></tr></table></div><div style="margin-bottom:12pt;padding-left:36pt"><font><br></font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Each Near Term Milestone Payment shall be paid only one time, regardless of the number of Licensed Products or the number of times a given Near Term Milestone Event has been achieved.  Mersana (or, if &#91;**&#93;, GSK) shall notify GSK (or Mersana) in writing within &#91;**&#93; following the achievement of a given Near Term Milestone Event.  GSK shall pay the corresponding Near Term Milestone Payment with respect to such Near Term Milestone Event in accordance with Section 11.9 (Payment Terms) within &#91;**&#93; following GSK&#8217;s receipt of valid invoice from Mersana in accordance with Section 11.9.2 (Invoicing).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.3&#160;&#160;&#160;&#160;Option Exercise Fee</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to Section 3.6.3 and Section 3.7.4, as applicable, if GSK exercises the Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, within &#91;**&#93; following GSK&#8217;s receipt of a valid invoice from Mersana in accordance with Section 11.9.2 (Invoicing), to be provided by Mersana on or after the License Effective Date, GSK shall pay to Mersana a non-creditable and non-refundable one-time payment of Ninety Million Dollars ($90,000,000) (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Option Exercise Fee</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.4&#160;&#160;&#160;&#160;Sharing of Development Costs</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then the terms of this Section 11.4 (Sharing of Development Costs) shall apply.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.4.1&#160;&#160;&#160;&#160;Reports&#59; Reconciliation Payments</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  With respect to Development Costs incurred by the Parties on and after the License Effective Date in connection with the performance of Shared Global Development Activities under the Joint Development Plan, within &#91;**&#93; following the end of each Calendar Quarter during the Collaboration Term in which any such Development Costs are incurred, each of Mersana and GSK (as applicable), shall submit to the Financial Working Group a written report of such Development Costs, in such </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-92-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">reasonable detail and format as is established by the Finance Working Group, which format shall be consistent with the categories calculated by the reporting Party in accordance with its Accounting Standards and financial systems &#91;**&#93;, all such Development Costs incurred by such Party during such Calendar Quarter (each, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Development Costs Report</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;)&#59; provided that, with respect to Development Costs incurred by Mersana in accordance with Section 3.2.3 (Expedited Dispute Resolution) or Section 5.2.3(b) following the Option Exercise Date, but prior to approval of the initial Joint Development Plan pursuant to Section 5.2.2 (Joint Development Plan), Mersana shall submit its report for such Development Costs to the Financial Working Group within &#91;**&#93; following the approval of the Joint Development Plan pursuant to Section 5.2.2 (Joint Development Plan).  In addition to the Development Costs Reports, each Party shall provide a &#91;**&#93;&#59; provided that, for clarity, such &#91;**&#93;.  Within &#91;**&#93; following the end of such Calendar Quarter, each Party shall either provide the other Party with a written report either &#91;**&#93; included in the Development Costs incurred by such Party during such Calendar Quarter, and, within &#91;**&#93; following the end of such Calendar Quarter, each Party shall either provide the other Party with a written report either &#91;**&#93; reported by each Party&#8217;s respective FTE tracking system included in the Development Costs incurred by such Party during such Calendar Quarter.  Within &#91;**&#93; following the receipt by the Financial Working Group of the Development Costs Report from each Party for such Calendar Quarter, the Financial Working Group shall prepare and submit to each Party a written statement setting forth (i) the calculation of all such Development Costs incurred by both Parties over such Calendar Quarter and any deviations from the then-current Joint Development Budget, and (ii) the calculation of the net amount due and payable by GSK to Mersana or by Mersana to GSK, as applicable, in order to ensure the appropriate sharing of such Development Costs in accordance with Section 5.2.4 (Shared Development Costs).  The Party that is due for reimbursement of Development Costs as set forth in such statement shall invoice the other Party within &#91;**&#93; of receipt of such statement from the Financial Working Group in accordance with Section 11.9.2 (Invoicing) and, subject to Section 5.2.4(a), any such undisputed amounts shall be due and payable by such other Party within &#91;**&#93; following such other Party&#8217;s receipt of such invoice&#59; provided, however, that any Development Costs incurred in excess of the agreed upon Joint Development Budget in any Calendar Quarter will be subject to the terms set forth in Section&#160;11.4.2 (Overruns).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.4.2&#160;&#160;&#160;&#160;Overruns</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Each Party shall notify the other Party promptly upon becoming aware that the anticipated Development Costs to be incurred by such Party under the Joint Development Plan for a given Calendar Year during the Development Term shall be in excess of the applicable approved Joint Development Budget.  Thereafter, the following shall apply&#58;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;Following such notification, the Financial Working Group, in consultation with the JDC and JMC (as and if needed), shall discuss the causes of any such increase and evaluate potential mitigation measures to prevent a further increase of the applicable Development Costs.  To the extent that, based on this discussion, the Financial Working Group concludes that the anticipated amount of the Development Costs is likely not to exceed &#91;**&#93; percent (&#91;**&#93;%) of the amounts budgeted for such Calendar Year during the Development </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-93-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Term (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Permitted Overage</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) as set forth in the then-current applicable Joint Development Budget, such anticipated or actual Development Costs shall be included in the calculation of the applicable Development Costs for the purposes of determining the amounts to be paid from one Party to the other Party to reflect the sharing percentages set forth in Section&#160;5.2.4 (Shared Development Costs)&#59; provided that such costs are not incurred as a result of any breach of this Agreement by a Party.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;If the Financial Working Group, in consultation with the JDC, concludes that the anticipated amount of the applicable Development Costs for such Calendar Year during the Development Term is likely to exceed the Permitted Overage (such amount the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Development Excess Costs</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) and there are no mitigation measures to prevent such Development Excess Costs, then such Development Excess Costs shall not be included in the calculation of the Development Costs and shall be borne by the Party incurring them, unless agreed by the Parties through the JSC to be shared.  Notwithstanding the foregoing, to the extent that Development Excess Costs are directly attributable to a change in Applicable Laws, a requirement of a Regulatory Authority, a change required to mitigate a safety issue or a Force Majeure event, or are otherwise agreed by the Parties, then such costs shall not be borne solely by the Party incurring them and shall be included in the calculation of Development Costs for the purposes of determining the amounts to be paid from one Party to the other Party for the applicable Calendar Year during the Development Term.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;To the extent the Development Costs for a given Calendar Year during the Development Term are less than the Development Costs included in the Joint Development Budget for such Calendar Year, because Shared Global Development Activities planned for such Calendar Year have been delayed to a subsequent Calendar Year during the Development Term, the Financial Working Group shall adjust the Joint Development Budget for such subsequent Calendar Year(s) to reflect such delay (but without increasing such delayed Development Costs).  </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.4.3&#160;&#160;&#160;&#160;Deemed Buy-In Payments</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  With respect to any Deemed Buy-In due and payable by Mersana pursuant to Section 5.3.2(c), within &#91;**&#93; following the end of the Calendar Quarter during the Collaboration Term in which Data from the applicable Independent Registration Study result in (a) receipt of initial Marketing Approval for a Licensed Product in the U.S. or European Union or (b) if the applicable Licensed Product has already achieved Marketing Approval in the U.S. or European Union, &#91;**&#93;, GSK shall submit to the Financial Working Group a written report (in a format consistent with the Development Costs Reports delivered pursuant to Section 11.4.1 (Reports&#59; Reconciliation Payments)) of all Out-Of-Pocket Costs, Development FTE Costs and Manufacturing Costs incurred by GSK or any of its Affiliates in the performance of the applicable Independent Registration Study and the calculation of the Deemed Buy-In amount due and payable by Mersana to GSK in accordance with Section&#160;5.3.2(c).  Within &#91;**&#93; following the receipt by the Financial Working Group of such written report from GSK pursuant to this Section 11.4.3 (Deemed Buy-In Payments), the Financial Working Group </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-94-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">shall review and agree on the Deemed Buy-In amount due and payable by Mersana to GSK in accordance with Section 5.3.2(c).  GSK shall invoice Mersana within &#91;**&#93; following receipt of such statement from the Financial Working Group, and, subject to Section 5.2.4(a), Mersana shall pay to GSK such Deemed Buy-In amount within &#91;**&#93; following receipt by Mersana of such invoice from GSK.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.4.4&#160;&#160;&#160;&#160;Cap Excess Amounts</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;Any Cap Excess Amount incurred by GSK or any of its Affiliates pursuant to Section 5.2.4(a) shall accrue interest, &#91;**&#93;, at a rate equal to the prime rate as published by Citibank, N.A., New York, New York, or any successor thereto, plus &#91;**&#93; percent (&#91;**&#93;%) (or the highest rate permissible under Applicable Law, if lower), commencing from the date on which such Cap Excess Amount is first incurred by or on behalf of GSK or its Affiliates, as applicable, until (i) &#91;**&#93; the month in which Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), (ii) &#91;**&#93; the month in which the Regulatory Milestone Event that triggers the applicable Regulatory Milestone Payment against which such Cap Excess Amount (and associated accrued interest) may be offset pursuant to Section&#160;11.4.4(c) occurs, (iii) &#91;**&#93; the Calendar Quarter in which the applicable Sales Milestone Payment or Royalties against which such Cap Excess Amount (and associated accrued interest) may be offset pursuant to Section 11.4.4(c) accrue&#59; or (iv) &#91;**&#93; the month in which Mersana delivers notice to GSK of its election to pay all or any part of such Cap Excess Amount (and associated accrued interest) in accordance with Section 11.4.4(d), as applicable.  </font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;If Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), then Mersana shall pay to GSK an amount equal to the sum of (i) all outstanding Cap Excess Amounts and (ii) all outstanding interest accrued with respect to any Cap Excess Amounts pursuant to Section 11.4.4(a), in each case ((i) and (ii)), in accordance with Section 11.4.4(e).</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;If Mersana does not exercise its Profit Share Election prior to the Mersana Exercise Date pursuant to Section 9.1.1 (Exercise of Profit Share Election), then, except to the extent that Mersana elects, pursuant to Section 11.4.4(d), to pay to GSK any portion of (A) any outstanding Cap Excess Amount, (B) any outstanding interest accrued with respect to any Cap Excess Amounts pursuant to Section 11.4.4(a) or (C) any combination of (A) and (B), GSK shall have the right to offset all or any portion of (i) any outstanding Cap Excess Amounts or (ii) any outstanding interest accrued with respect to any Cap Excess Amounts pursuant to Section 11.4.4(a), as applicable, against any (i) Regulatory Milestone Payment(s) that become due and payable by GSK pursuant to Section 11.6.2 (Regulatory Milestones), (ii) Sales Milestone Payment(s) that become due and payable by GSK pursuant to Section&#160;11.6.3 (Sales Milestones), or (iii) Royalties that become due and payable by GSK pursuant to Section 11.7 (Royalties), as applicable.  For the avoidance of doubt, if Mersana does not exercise </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-95-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">its Profit Share Election, &#91;**&#93; except as set forth in this Section 11.4.4(c).</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(d)&#160;&#160;&#160;&#160;Without limiting Section 11.4.4(b) or Section 11.4.4(c), as applicable, at any time during the Collaboration Term, Mersana may elect, by delivery of written notice to GSK, to pay to GSK all or any portion of (i) any outstanding Cap Excess Amount or (ii) any outstanding interest accrued with respect to any Cap Excess Amounts pursuant to Section&#160;11.4.4(a), in each case ((i) and (ii)), in accordance with Section&#160;11.4.4(e)&#59; provided that, except as set forth in Section 11.9.6 (Late Payments), &#91;**&#93;&#59; provided, further, that Mersana shall deliver such notice to GSK no later than &#91;**&#93; prior to the end of a given Calendar Quarter and shall identify in such notice the amount of such Cap Excess Amount or accrued interest, as applicable, that Mersana is electing to repay pursuant to this Section 11.4.4(d).</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(e)&#160;&#160;&#160;&#160;If any Cap Excess Amount (or accrued interest thereon) becomes due and payable pursuant to Section 11.4.4(b), or if Mersana elects to pay any Cap Excess Amount (or any accrued interest thereon) pursuant to Section 11.4.4(d), or if GSK elects to offset any Cap Excess Amount (or accrued interest thereon) against any Regulatory Milestone Payment, Sales Milestone Payment or Royalties pursuant to Section 11.4.4(c), as applicable, then, within &#91;**&#93; following the date on which such amount becomes due and payable, or Mersana or GSK makes such election (as applicable), GSK shall prepare and submit to the Financial Working Group a written report (in a format consistent with the Development Costs Reports delivered pursuant to Section 11.4.1 (Reports&#59; Reconciliation Payments)) of all outstanding Cap Excess Amounts and any outstanding interest accrued with respect to any Cap Excess Amounts pursuant to Section 11.4.4(a), as applicable.  Within &#91;**&#93; following the receipt by the Financial Working Group of such report from GSK pursuant to this Section&#160;11.4.4(e), the Financial Working Group shall review and agree on (i) the Cap Excess Amounts (including any outstanding interest accrued with respect to such outstanding Cap Excess Amounts pursuant to Section 11.4.4(a)) as of the end of such Calendar Quarter and (ii) the aggregate amount due and payable by Mersana to GSK with respect thereto&#59; provided that, following the Financial Working Group agreeing on such Cap Excess Amounts (as applicable)&#58;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(1)&#160;&#160;&#160;&#160;if such Cap Excess Amount is due and payable pursuant to Section 11.4.4(b), then, within &#91;**&#93; following receipt of such report from the Financial Working Group, GSK shall deliver an invoice to Mersana for all outstanding Cap Excess Amounts and such accrued interest as set forth therein and Mersana shall pay such amount to GSK within &#91;**&#93; following receipt by Mersana of such invoice from GSK in accordance with Section 11.9.2 (Invoicing)&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(2)&#160;&#160;&#160;&#160;if Mersana elects to pay all or part of such Cap Excess Amount pursuant to Section 11.4.4(d), then, within &#91;**&#93; following receipt of such report from the Financial Working Group, Mersana shall deliver written notice to GSK to confirm the </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-96-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">total amount that Mersana elects to pay with respect to such outstanding Cap Excess Amount or such accrued interest as set forth therein and, within &#91;**&#93; following receipt of such notice from Mersana, GSK shall deliver an invoice to Mersana for such amount as set forth in Mersana&#8217;s notice and Mersana shall pay such amount to GSK within &#91;**&#93; following receipt by Mersana of such invoice from GSK in accordance with Section 11.9.2 (Invoicing)&#59; or</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(3)&#160;&#160;&#160;&#160;if GSK has elected to offset such Cap Excess Amount against any Regulatory Milestone Payment, Sales Milestone Payment or Royalties pursuant to Section 11.4.4(c), then GSK shall designate such offset amount in (A) its notice of the corresponding Milestone Event delivered to Mersana pursuant to Section 11.6.4 (Milestone Payment Terms) or (ii) the applicable royalty report delivered to Mersana pursuant to Section 11.7.8 (Royalty Reporting), as applicable.</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">For the avoidance of doubt, nothing in this Section 11.4.4(e) limits Mersana&#8217;s right to receive any reports, or GSK&#8217;s obligation to provide any reports, under Section 5.2.5 (Development Reporting) or Section 11.4.1 (Reports&#59; Reconciliation Payments), as applicable.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.5&#160;&#160;&#160;&#160;Pre-Tax Profit or Loss Sharing</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), then the terms of this Section 11.5 (Pre-Tax Profit or Loss Sharing) shall apply.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.5.1&#160;&#160;&#160;&#160;Pre-Tax Profit or Loss</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  In partial consideration for the licenses granted to GSK under Section 4.1 (License Grant to GSK), if Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), following the Profit Share Start Date, the Parties shall share, on a Licensed Product&#8211;by&#8211;Licensed Product basis, the Pre-Tax Profit or Loss in the Shared Territory with respect to the Licensed Compound and Licensed Products &#91;**&#93; for the remainder of the Term, as follows&#58; Mersana shall bear (and be entitled to) &#91;**&#93; percent (&#91;**&#93;%), and GSK shall bear (and be entitled to) &#91;**&#93; percent (&#91;**&#93;%), of the Pre-Tax Profit or Loss, all in accordance with this Section 11.5 (Pre-Tax Profit or Loss Sharing) and the Pre-Tax Profit or Loss Schedule, including the procedures for reporting, quarterly reconciliation and other finance and accounting matters as set forth herein.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.5.2&#160;&#160;&#160;&#160;Reporting Generally</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Within &#91;**&#93; following the end of each Calendar Quarter that occurs following the Profit Share Start Date and in which either Party incurs any Allowable Expenses or accrues any Net Sales or Other Income with respect to any Licensed Product &#91;**&#93; in the Shared Territory, each Party shall provide to the Financial Working Group a report detailing their respective Net Sales (with respect to GSK) and Other Income and Allowable Expenses (with respect to both Parties) that will be used to calculate the Pre-Tax Profit or Loss with respect to such Licensed Product(s) &#91;**&#93; for such Calendar Quarter, in such reporting format as the Financial Working Group shall establish for use, which reporting format shall be consistent with the categories calculated by the reporting Party in accordance with its Accounting Standards (each, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Pre-Tax Profit or Loss Report</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;)&#59; </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-97-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">provided, however, that (a) by the &#91;**&#93; of each such Calendar Quarter, each of Mersana and GSK shall provide to the Financial Working Group &#91;**&#93;.  Each Pre-Tax Profit or Loss Report shall specify in reasonable detail any Net Sales, Other Income or Allowable Expenses for such Licensed Product(s) &#91;**&#93; in the Shared Territory in the corresponding Calendar Quarter received and incurred by the reporting Party or any of its Affiliates, Sublicensees or subcontractors in accordance with this Agreement.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.5.3&#160;&#160;&#160;&#160;Net Sales Reporting</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Without limiting the generality of Section 11.5.2 (Reporting Generally) or Section 11.7.8 (Royalty Reporting), if Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), then, within &#91;**&#93; following the end of each Calendar Quarter, beginning with the first Calendar Quarter in which the First Commercial Sale of such Licensed Product in the Shared Territory occurs, GSK shall provide the Financial Working Group with a report of the Net Sales for the preceding Calendar Quarter on a Licensed Product-by-Licensed Product for the Shared Territory.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.5.4&#160;&#160;&#160;&#160;Flash Sales Reports</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  As soon as reasonably practicable, but in no event later than the &#91;**&#93; following the end of each Calendar Quarter in which a Pre-Tax Profit or Loss Report shall be deliverable pursuant to Section&#160;11.5.2 (Reporting Generally), on a Licensed Product-by-Licensed Product basis, beginning with the Calendar Quarter in which the First Commercial Sale of such Licensed Product occurs in the Shared Territory, GSK will provide to the Financial Working Group a flash report providing a good faith, non-binding estimate of Net Sales accrued during the respective Calendar Quarter in the Shared Territory.  Such flash report shared prior to public announcement shall be provided to Mersana on a strictly confidential basis such that it will only be available to the Financial Working Group. The flash report may be based on forecasted numbers and the Parties agree that the final Net Sales reported in the Pre-Tax Profit or Loss Reports for reconciliation may differ from these flash sales reports.  For clarity, &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.5.5&#160;&#160;&#160;&#160;Reconciliation and Payment</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;If either Party has any questions or concerns regarding the Development Costs in a Development Costs Report provided pursuant to Section&#160;11.4.1 (Reports&#59; Reconciliation Payments) or the calculation of Allowable Expenses, Net Sales or Other Income reported by the other Party in a Pre-Tax Profit or Loss Report provided pursuant to Section&#160;11.5.2 (Reporting Generally), as applicable, the Financial Working Group shall endeavor to resolve such questions and concerns of either Party within &#91;**&#93; following the end of the applicable Calendar Quarter.  Additionally, the Financial Working Group may by mutual agreement adjust the timing for notification or payment of any reconciliation payments hereunder.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;Unless such timing is otherwise modified by the Financial Working Group, within &#91;**&#93; following receipt of each Party&#8217;s Development Costs Report provided pursuant to Section 11.4.1 (Reports&#59; Reconciliation Payments) or Pre-Tax Profit or Loss Report provided pursuant to Section 11.5.2 (Reporting Generally), as applicable, the Financial Working Group shall confer and agree in writing on a </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-98-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">reconciliation report setting out the calculation of any payment to be paid by Mersana to GSK or by GSK to Mersana (each, as the case may be, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Balancing Payment</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) in order to effect the sharing of Development Costs in accordance Section 11.4 (Sharing of Development Costs) or the sharing of Pre-Tax Profit or Loss in accordance with Section 11.5 (Pre-Tax Profit or Loss), as applicable.  Within &#91;**&#93; following receipt of such report from the Financial Working Group, each Party that is owed a Balancing Payment shall invoice the other Party for the amount of such Balancing Payment due in accordance with Section 11.9.2 (Invoicing) and the other Party shall pay such invoiced amount within &#91;**&#93; following receipt of such invoice&#59; provided that, in the event of any dispute regarding the Balancing Payment due, the undisputed portion of such Balancing Payment shall be paid in accordance with the foregoing timetable by the applicable Party, and the remaining, disputed portion shall be paid in accordance with Section 11.14 (Financial Disputes) or Article 18 (Dispute Resolution), as applicable.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;Each Party shall notify the other Party promptly after becoming aware that the anticipated Allowable Expenses (including any Manufacturing Costs included in such Allowable Expenses) to be incurred by such Party for a Licensed Product for a given Calendar Year in the Shared Territory shall be in excess of the applicable approved Shared Territory Commercialization Budget for such Licensed Product for such Calendar Year.  Following such notification, the Financial Working Group shall discuss the causes of any such increase and evaluate potential mitigation measures to prevent a further increase of Allowable Expenses, as applicable.  To the extent that, based on this discussion, the Financial Working Group mutually concludes that the anticipated amount of the applicable Allowable Expenses, in aggregate is likely not to exceed &#91;**&#93; percent (&#91;**&#93;%) of the amounts budgeted for such aggregate Allowable Expenses in such Calendar Year (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Commercialization Permitted Overage</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) to be incurred by GSK or any of its Affiliates for its Commercialization activities for the Licensed Product (or, if Mersana exercises its Co-Promotion Right pursuant to Section 9.2.1 (Exercise of Co-Promotion Right), by Mersana or any of its Affiliates for the conduct of its Detailing activities under the Detailing Plan, as applicable) in the Shared Territory in such Calendar Year as set forth in the then-current applicable Shared Territory Commercialization Budget, then such anticipated costs or expenses shall be included in the calculation of the applicable Allowable Expenses for the purposes of calculating the Pre-Tax Profit or Loss hereunder.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(d)&#160;&#160;&#160;&#160;If the Financial Working Group, in consultation with the JSC, concludes that the anticipated amount of the applicable aggregate Allowable Expenses for such Calendar Year is likely to exceed the Commercialization Permitted Overage (such amount the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Commercialization Excess Costs</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), then such Commercialization Excess Costs shall not be included in the calculation of the applicable Allowable Expenses for the purposes of calculating the Pre-Tax Profit or Loss and shall be borne by the Party incurring them, unless agreed by the Parties through the JSC to be shared.  However, to the extent </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-99-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">that Commercialization Excess Costs are directly attributable to and required by a change in Applicable Laws, a requirement of a Regulatory Authority, a change reasonably required to mitigate a safety issue or a Force Majeure event, or are otherwise agreed by the Parties, then such Commercialization Excess Costs shall not be borne solely by the incurring Party and shall be included in the calculation of the applicable Allowable Expenses.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.5.6&#160;&#160;&#160;&#160;Income Taxes</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to Section 11.10 (Tax Matters), income and withholding Taxes imposed on either of the Parties hereunder shall not be included in Pre-Tax Profit or Loss hereunder.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.6&#160;&#160;&#160;&#160;Milestones</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.6.1&#160;&#160;&#160;&#160;Development Milestones</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to Section 16.7 (Certain Additional Remedies of GSK in Lieu of Termination), in partial consideration for the rights and licenses granted to GSK hereunder following the License Effective Date, including pursuant to Section 4.1 (License Grant to GSK), GSK shall pay to Mersana the following one-time, non-refundable, non-creditable milestone payments (each, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Development Milestone Payment</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) upon the first achievement by or on behalf of either Party or any of its Affiliates or Sublicensees of the corresponding milestone events with respect to any Licensed Product during the Collaboration Term (each, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Development Milestone Event</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) as set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> below in accordance with Section 11.6.4 (Milestone Payment Terms).  Each Development Milestone Payment shall be payable for the first Licensed Product to achieve the corresponding Development Milestone Event &#91;**&#93; as set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%;text-decoration:underline">Table 11.6.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%"><br>Development Milestone Payments</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:32.233%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:32.233%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:32.234%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">Tumor Type</font></td><td colspan="6" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">Development Milestone Events</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">Initiation of the &#91;**&#93; <br>for a Licensed Product</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">Initiation of the &#91;**&#93; <br>for a Licensed Product</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-bottom:0.5pt solid #000000;border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-bottom:0.5pt solid #000000;border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-bottom:0.5pt solid #000000;border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr></table></div><div><font><br></font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">In addition to the Development Milestone Events set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> above, the &#91;**&#93; shall also be deemed a Development Milestone Event and GSK shall pay to Mersana a single one-time Development Milestone Payment </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-100-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">of &#91;**&#93; Dollars ($&#91;**&#93;) with respect thereto in accordance with Section 11.6.4 (Milestone Payment Terms).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">If (a) a Development Milestone Event set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> is achieved by &#91;**&#93; and (b) the Near Term Milestone Event for &#91;**&#93; has not previously been achieved, then such Near Term Milestone Event will be deemed to have been achieved upon the achievement of such Development Milestone Event as set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, and the corresponding Near Term Milestone Payment for such Near Term Milestone Event shall be paid in accordance with Section 11.6.4 (Milestone Payment Terms).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">If, with respect to a given Indication, (x) the &#91;**&#93; Development Milestone Event set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> is achieved with respect to such Indication and (y) the &#91;**&#93; Development Milestone Event set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> with respect to such Indication has not previously been achieved, then such &#91;**&#93; Development Milestone Event will be deemed to have been achieved upon the achievement of such &#91;**&#93; Development Milestone Event, and the Milestone Payment corresponding to such &#91;**&#93; Development Milestone Event shall be paid in accordance with Section 11.6.4 (Milestone Payment Terms).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.6.2&#160;&#160;&#160;&#160;Regulatory Milestones</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to Section 16.7 (Certain Additional Remedies of GSK in Lieu of Termination), in partial consideration for the rights and licenses granted to GSK hereunder following the License Effective Date, including pursuant to Section 4.1 (License Grant to GSK), GSK shall pay to Mersana the following one-time, non-refundable, non-creditable milestone payments (each, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Regulatory Milestone Payment</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) upon the first achievement by or on behalf of GSK or any of its Affiliates or Sublicensees of the corresponding milestone events with respect to any Licensed Product during the Collaboration Term (each, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Regulatory Milestone Event</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) as set forth&#58; (a) in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.2(A)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> below, if Mersana does not exercise its Profit Share Election prior to the expiration of the Mersana Exercise Period pursuant to Section 9.1.1 (Exercise of Profit Share Election)&#59; or (b) </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.2(B)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> below, if Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), in each case ((a) or (b)), in accordance with Section 11.6.4 (Milestone Payment Terms).  Each Regulatory Milestone Payment shall be payable for the first Licensed Product to achieve the corresponding Regulatory Milestone Event &#91;**&#93; as set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.2(A)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> or </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.2(B)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, as applicable.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-101-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%;text-decoration:underline">Table 11.6.2(A)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%"><br>Regulatory Milestone Payments in Territory (No Profit Share Election)</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:32.233%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:32.233%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:32.234%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">Tumor Type</font></td><td colspan="6" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">Regulatory Milestone Events</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">&#91;**&#93; for a Licensed Product by a <br>Regulatory Authority <br>in the Territory</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">&#91;**&#93; for a Licensed Product by a <br>Regulatory Authority in <br>the Territory</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-bottom:0.5pt solid #000000;border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-bottom:0.5pt solid #000000;border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-bottom:0.5pt solid #000000;border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr></table></div><div><font><br></font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%;text-decoration:underline">Table 11.6.2(B)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%"><br>Regulatory Milestone Payments in GSK Territory (Profit Share Election)</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:48.900%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:48.900%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">Tumor Type</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">Regulatory Milestone Event</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">&#91;**&#93; for a Licensed Product by a Regulatory Authority in the GSK Territory</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-bottom:0.5pt solid #000000;border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td><td colspan="3" style="border-bottom:0.5pt solid #000000;border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr></table></div><div><font><br></font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">If, with respect to a given Indication, (a) a Regulatory Milestone Event set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.2(A)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> or </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.2(B)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> is achieved with respect to such Indication and (b) any Development Milestone Event set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> has not previously been achieved for such Indication, then such Development Milestone Event milestone event set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> will be deemed to have been achieved upon the achievement of such Regulatory Milestone Event set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.2(A)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> or </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.2(B)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, as applicable, and the corresponding Development Milestone Payment for such Development Milestone Event set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> shall be paid in accordance with Section 11.6.4 (Milestone Payment Terms).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">If, with respect to a given Indication, (x) the &#91;**&#93; Regulatory Milestone Event set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.2(A)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> is achieved with respect to such Indication and (y) the &#91;**&#93; Regulatory Milestone Event set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.2(A)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> with respect to such Indication has not previously been achieved, then such &#91;**&#93; Regulatory Milestone Event will be deemed to have been achieved upon the achievement of such &#91;**&#93; Regulatory Milestone Event, and the corresponding Regulatory Milestone Payment for such &#91;**&#93; Regulatory Milestone Event shall be paid in accordance with Section 11.6.4 (Milestone Payment Terms).</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-102-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.6.3&#160;&#160;&#160;&#160;Sales Milestones</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;Subject to Section 16.7 (Certain Additional Remedies of GSK in Lieu of Termination), if Mersana does not exercise its Profit Share Election prior to the expiration of the Mersana Exercise Period pursuant to Section 9.1.1 (Exercise of Profit Share Election), then, in partial consideration for the rights and licenses granted to GSK hereunder following the License Effective Date, including pursuant to Section 4.1 (License Grant to GSK), GSK shall pay to Mersana the Net Sales-based milestone payments as set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.3(a)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> below (each, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Global Sales Milestone Payment</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) following the first time that the aggregate Net Sales for all Licensed Products in the Territory within any Calendar Year during the Collaboration Term meets the corresponding threshold set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.3(a)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> below (each, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Global Sales Milestone Event</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) in accordance with Section 11.6.4 (Milestone Payment Terms).</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:72.938%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:24.862%"></td><td style="width:0.1%"></td></tr><tr><td colspan="6" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:2.75pt;padding-right:2.75pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%;text-decoration:underline">Table 11.6.3(a)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%"> &#8211; Global Sales Milestones</font></div></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">Global Sales Milestone Events</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">Global Sales Milestone Payments</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">(1)  Aggregate Net Sales in a Calendar Year of all Licensed Products in the Territory exceeds &#91;**&#93; Dollars ($&#91;**&#93;)</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">(2)  Aggregate Net Sales in a Calendar Year of all Licensed Products in the Territory exceeds &#91;**&#93; Dollars ($&#91;**&#93;)</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">(3)  Aggregate Net Sales in a Calendar Year of all Licensed Products in the Territory exceeds &#91;**&#93; Dollars ($&#91;**&#93;)</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">(4)  Aggregate Net Sales in a Calendar Year of all Licensed Products in the Territory exceeds &#91;**&#93; Dollars ($&#91;**&#93;)</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-bottom:0.5pt solid #000000;border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">(5)  Aggregate Net Sales in a Calendar Year of all Licensed Products in the Territory exceeds &#91;**&#93; Dollars ($&#91;**&#93;)</font></td><td colspan="3" style="border-bottom:0.5pt solid #000000;border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr></table></div><div><font><br></font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;Subject to Section 16.7 (Certain Additional Remedies of GSK in Lieu of Termination), if Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), then, in partial consideration for the rights and licenses granted to GSK hereunder following the License Effective Date, including pursuant to Section 4.1 (License Grant to GSK), GSK shall pay to Mersana the Net Sales-based milestone payments as set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.3(b)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> below (each, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Territory Sales Milestone Payment</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) following the first time that the aggregate Net Sales for all Licensed Products in the GSK Territory within any Calendar Year during the Collaboration Term meets the corresponding threshold set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.6.3(b)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> below (each, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Territory Sales Milestone Event</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) in accordance with Section&#160;11.6.4 (Milestone Payment Terms).</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-103-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:72.938%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:24.862%"></td><td style="width:0.1%"></td></tr><tr><td colspan="6" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%;text-decoration:underline">Table 11.6.3(b)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%"> &#8211; GSK Territory Sales Milestones</font></div></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">GSK Territory Milestone Events</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">GSK Territory Milestone Payments</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">(1)  Aggregate Net Sales in a Calendar Year of all Licensed Products in the GSK Territory exceeds &#91;**&#93; Dollars ($&#91;**&#93;)</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">(2)  Aggregate Net Sales in a Calendar Year of all Licensed Products in the GSK Territory exceeds &#91;**&#93; Dollars ($&#91;**&#93;)</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">(3)  Aggregate Net Sales in a Calendar Year of all Licensed Products in the GSK Territory exceeds &#91;**&#93; Dollars ($&#91;**&#93;)</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">(4)  Aggregate Net Sales in a Calendar Year of all Licensed Products in the GSK Territory exceeds &#91;**&#93; Dollars ($&#91;**&#93;)</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr><tr><td colspan="3" style="border-bottom:0.5pt solid #000000;border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">(5)  Aggregate Net Sales in a Calendar Year of all Licensed Products in the GSK Territory exceeds &#91;**&#93; Dollars ($&#91;**&#93;)</font></td><td colspan="3" style="border-bottom:0.5pt solid #000000;border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;</font></td></tr></table></div><div><font><br></font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.6.4&#160;&#160;&#160;&#160;Milestone Payment Terms</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;During the Collaboration Term, the Party achieving a given (i) Development Milestone Event pursuant to Section 11.6.1 (Development Milestones) or (ii) Regulatory Milestone Event pursuant to Section&#160;11.6.2 (Regulatory Milestones), as applicable, shall notify the other Party in writing promptly, but in no event later than &#91;**&#93;, after such Party is made aware of the first achievement of such Development Milestone Event or Regulatory Milestone Event, and, following achievement of such Milestone Event, GSK shall pay the corresponding Milestone Payment with respect to each such Milestone Event in accordance with Section 11.9 (Payment Terms) within &#91;**&#93; following GSK&#8217;s receipt of a valid invoice from Mersana for such Milestone Payment in accordance with Section 11.9.2 (Invoicing).</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;During the Collaboration Term, GSK shall notify Mersana in writing promptly, but in no event later than &#91;**&#93; following the end of the applicable Calendar Quarter in which a Sales Milestone Event is achieved pursuant to Section 11.6.3 (Sales Milestones) and, following delivery of such notice, GSK shall pay the corresponding Sales Milestone Payment with respect to each such Sales Milestone Event in accordance with Section 11.9 (Payment Terms) by the &#91;**&#93; following GSK&#8217;s receipt of a valid invoice from Mersana for such Sale Milestone Payment in accordance with Section 11.9.2 (Invoicing).  &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;Without limiting either Section 11.6.4(a) or Section 11.6.4(b), if GSK has elected to offset any Cap Excess Amount against any Regulatory Milestone Payment or Sales Milestone Payment pursuant to Section&#160;11.4.4(c), then, in addition to any other information required to be provided pursuant to this Section 11.6.4 (Milestone Payment Terms), GSK shall also include in the notice delivered pursuant to Section&#160;11.6.4(a) or Section 11.6.4(b), as applicable, a statement of the amount of offset with respect to such Cap Excess Amount.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.7&#160;&#160;&#160;&#160;Royalties</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-104-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.7.1&#160;&#160;&#160;&#160;Global Royalties</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to Section 16.7 (Certain Additional Remedies of GSK in Lieu of Termination) and the remainder of this Section 11.7 (Royalties), if Mersana does not exercise its Profit Share Election prior to the expiration of the Mersana Exercise Period pursuant to Section 9.1.1 (Exercise of Profit Share Election), then, in partial consideration for the rights and licenses granted to GSK hereunder following the License Effective Date, including pursuant to Section 4.1 (License Grant to GSK), GSK shall pay to Mersana Royalties on aggregate annual Net Sales of all Licensed Products in the Territory during a given Calendar Year at the royalty rates set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.7.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> below (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Global Royalties</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  Global Royalties with respect to a given Licensed Product in a given country shall only be paid during the Royalty Term for such Licensed Product in such country.</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:48.900%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:48.900%"></td><td style="width:0.1%"></td></tr><tr><td colspan="6" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%;text-decoration:underline">Table 11.7.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%"> &#8211; Global Royalties </font></div><div style="padding-left:2.75pt;padding-right:2.75pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">(No Profit Share Election)</font></div></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">Calendar Year Net Sales</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">Royalty Rate</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">For that portion of aggregate Net Sales in a Calendar Year of all Licensed Products in the Territory up to and including $&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;%</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">For that portion of aggregate Net Sales in a Calendar Year of all Licensed Products in the Territory greater than $&#91;**&#93; up to and including $&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;%</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">For that portion of aggregate Net Sales in a Calendar Year of all Licensed Products in the Territory greater than $&#91;**&#93; up to and including $&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;%</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">For that portion of aggregate Net Sales in a Calendar Year of all Licensed Products in the Territory greater than $&#91;**&#93; up to and including $&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;%</font></td></tr><tr><td colspan="3" style="border-bottom:0.5pt solid #000000;border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">For that portion of aggregate Net Sales in a Calendar Year of all Licensed Products in the Territory greater than $&#91;**&#93;</font></td><td colspan="3" style="border-bottom:0.5pt solid #000000;border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;%</font></td></tr></table></div><div><font><br></font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.7.2&#160;&#160;&#160;&#160;GSK Territory Royalties</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to Section 16.7 (Certain Additional Remedies of GSK in Lieu of Termination) and the remainder of this Section&#160;11.7 (Royalties), if Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), then, in partial consideration for the rights and licenses granted to GSK hereunder following the License Effective Date, including pursuant to Section 4.1 (License Grant to GSK), GSK shall pay to Mersana Royalties on aggregate annual Net Sales of all Licensed Products in the GSK Territory during a given Calendar Year at the royalty rates set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Table 11.7.2</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> below (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Territory Royalties</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  GSK Territory Royalties with respect to a given Licensed Product in a given country shall only be paid during the Royalty Term for such Licensed Product in such country.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-105-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:78.707%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:19.093%"></td><td style="width:0.1%"></td></tr><tr><td colspan="6" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:2.75pt;padding-right:2.75pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%;text-decoration:underline">Table 11.7.2</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%"> &#8211; GSK Territory Royalties <br>(Profit Share Election)</font></div></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">Calendar Year Net Sales</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:125%">Royalty Rate</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">For that portion of aggregate Net Sales in a Calendar Year of all Licensed Products in the GSK Territory up to and including $&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;%</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">For that portion of aggregate Net Sales in a Calendar Year of all Licensed Products in the GSK Territory greater than $&#91;**&#93; up to and including $&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;%</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">For that portion of aggregate Net Sales in a Calendar Year of all Licensed Products in the GSK Territory greater than $&#91;**&#93; up to and including $&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;%</font></td></tr><tr><td colspan="3" style="border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">For that portion of aggregate Net Sales in a Calendar Year of all Licensed Products in the GSK Territory greater than $&#91;**&#93; up to and including $&#91;**&#93;</font></td><td colspan="3" style="border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;%</font></td></tr><tr><td colspan="3" style="border-bottom:0.5pt solid #000000;border-left:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt 2px 3.77pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">For that portion of aggregate Net Sales in a Calendar Year of all Licensed Products in the GSK Territory greater than $&#91;**&#93;</font></td><td colspan="3" style="border-bottom:0.5pt solid #000000;border-left:0.5pt solid #000000;border-right:0.5pt solid #000000;border-top:0.5pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:125%">&#91;**&#93;%</font></td></tr></table></div><div><font><br></font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.7.3&#160;&#160;&#160;&#160;No Valid Patent Claim</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The foregoing provisions of Section 11.7.1 (Global Royalties) or Section 11.7.2 (GSK Territory Royalties), as applicable, notwithstanding, the Royalties payable with respect to Net Sales of Licensed Products shall be reduced, on a Licensed Product&#8211;by&#8211;Licensed Product, country&#8211;by&#8211;country basis, by &#91;**&#93; percent (&#91;**&#93;%) of the amounts otherwise payable pursuant to Section 11.7.1 (Global Royalties) or Section 11.7.2 (GSK Territory Royalties), as applicable, and subject to Section 11.7.6 (Royalty Floor), during the remainder of the Royalty Term for such Licensed Product, following the expiration of both (a) the last to expire Valid Patent Claim in such country of (i) any Mersana Patent or (ii) any Assigned Product-Specific Arising Patent, &#91;**&#93; and (b) all Regulatory Exclusivity with respect to such Licensed Product in such country.  </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.7.4&#160;&#160;&#160;&#160;Biosimilar Step-Down</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to Section 11.7.6 (Royalty Floor), if, on a Licensed Product-by-Licensed Product and country-by-country basis, (a) one or more Biosimilar Products of such Licensed Product are sold in such country&#59; (b) such Biosimilar Product(s) in such country exceed a &#91;**&#93; percent (&#91;**&#93;%) share of the aggregate market in such country of such Licensed Product and all such Biosimilar Product(s) (by unit equivalent volume and based on the number of units of such Licensed Product and such Biosimilar Product(s) in the aggregate sold in such country, as measured by &#91;**&#93;&#59; and (c) such &#91;**&#93; percent (&#91;**&#93;%) market share continues in such country for &#91;**&#93; during the applicable Royalty Term, then the Royalties payable with respect to Net Sales of such Licensed Product in such country pursuant to Section 11.7.1 (Global Royalties) or Section 11.7.2 (GSK Territory Royalties), as applicable, shall thereafter be reduced to &#91;**&#93; percent (&#91;**&#93;%) of the Royalties otherwise payable pursuant Section 11.7.1 (Global Royalties) or Section 11.7.2 (GSK Territory Royalties), as applicable.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.7.5&#160;&#160;&#160;&#160;Third Party Payments</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to Section 11.7.6 (Royalty Floor) and Section&#160;11.8.1 (Mersana Upstream Agreement Payments) (and, if Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), then, to the extent not included in the Third Party Licensing Payments shared by the Parties as part of the Pre-Tax Profit or Loss), as applicable, GSK shall be entitled to, on a Licensed Product-by-Licensed </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-106-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Product, country-by-country and Calendar Quarter-by-Calendar Quarter basis, credit against the Royalties due to Mersana upon Net Sales of such Licensed Product in such country in such Calendar Quarter pursuant Section 11.7.1 (Global Royalties) or Section 11.7.2 (GSK Territory Royalties), as applicable, an amount equal to &#91;**&#93; percent (&#91;**&#93;%) of any and all royalties or other payments made by GSK (or any of its Affiliates) to Third Parties with respect to licenses or rights granted under Patents (or Know-How that is licensed or granted together with such Patents) controlled by Third Parties that are necessary to avoid infringement of such Third Party Patents (or misappropriation of such Third Party Know-How related to such Third Party Patents) in the manufacture, use, offer for sale, sale or importation of such Licensed Product in such country during such Calendar Quarter, including with respect to GSK&#8217;s pro rata share of any payments due under any New Mersana Upstream Agreement as mutually agreed by the Parties with respect thereto pursuant to Section 13.6.2 (New Mersana Upstream Agreements) or any applicable agreement or other arrangement pursuant to which GSK (or any of its Affiliates) obtains such in-licenses or other rights under such Patents or Know-How pursuant to Section 13.6.3 (Additional Third Party IP).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.7.6&#160;&#160;&#160;&#160;Royalty Floor</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  All Royalty reductions and credits provided for in Section&#160;11.7.3 (No Valid Patent Claim), Section 11.7.4 (Biosimilar Step-Down) and Section 11.7.5 (Third Party Payments) (but without taking into account any reduction pursuant to Section 16.7 (Certain Additional Remedies of GSK in Lieu of Termination)), as applicable, shall not cumulatively reduce the Royalties payable to Mersana with respect to a given Licensed Product in a given country in a given Calendar Quarter to less than &#91;**&#93; percent (&#91;**&#93;%) of the Royalties otherwise due to Mersana pursuant to Section 11.7.1 (Global Royalties) or Section 11.7.2 (GSK Territory Royalties), as applicable, with respect to such Licensed Product in such country in such Calendar Quarter.  Any amount that is not so reduced or credited in a given Calendar Year due to the limitation in the immediately preceding sentence, shall be carried forward for application against Royalties payable to Mersana with respect to Net Sales of such Licensed Product in such country in (a) with respect to the Global Royalties under Section 11.7.1 (Global Royalties), in the Territory or (b) with respect to the GSK Territory Royalties under Section 11.7.2 (GSK Territory Royalties), in the GSK Territory, as applicable (in each case ((a) or (b)), in future Calendar Quarters for application as a Royalty reduction, subject in each case to the foregoing &#91;**&#93; percent (&#91;**&#93;%) floor&#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.7.7&#160;&#160;&#160;&#160;Compulsory Licenses</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Notwithstanding anything to the contrary set forth herein, if, during the Royalty Term of a given Licensed Product in a given country in the Territory outside of the U.S. or European Union, a license or other right is granted to a Third Party to use, sell (or offer for sale or contract to sell), import, export or otherwise Commercialize such Licensed Product in such country through the order, decree or grant of a Governmental Authority within such country with a royalty rate lower than the Royalties that otherwise would be payable with respect to such Licensed Product in such country in (a) with respect to the Global Royalties under Section 11.7.1 (Global Royalties), the Territory or (b) with respect to the GSK Territory Royalties under Section&#160;11.7.2 (GSK Territory Royalties), the GSK Territory, as applicable (as adjusted pursuant to Section 11.7.3 (No Valid Patent Claim), Section 11.7.4 (Biosimilar Step-Down) and Section 11.7.5 (Third Party Payments), as applicable), then the Royalties payable to Mersana with respect to Net Sales of </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-107-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">such Licensed Product in such country under this Section 11.7 (Royalties) shall be reduced to the rate payable by the compulsory licensee.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.7.8&#160;&#160;&#160;&#160;Royalty Reporting</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Each Calendar Quarter following the First Commercial Sale of a Licensed Product (a) with respect to the Global Royalties under Section 11.7.1 (Global Royalties), in the Territory or (b) with respect to the GSK Territory Royalties under Section 11.7.2 (GSK Territory Royalties), in the GSK Territory, as applicable, GSK shall furnish to Mersana a written report showing, on a Licensed Product&#8211;by&#8211;Licensed Product and country-by-country basis, (i) the Net Sales, (ii) the calculation of the Royalties payable under this Agreement on account of those Net Sales, and (iii) if GSK has elected to offset any Cap Excess Amount against Royalties for such Calendar Quarter pursuant to Section 11.4.4(c), a statement of the amount of offset with respect to such Cap Excess Amount, as applicable.  GSK will keep and cause its Affiliates to keep, complete and accurate records in sufficient detail to enable the Royalties payable to be determined and the information provided to be verified.  Each royalty report delivered for a Calendar Quarter hereunder, along with the Royalties shown to be payable for such Calendar Quarter in such report, shall be due and payable to Mersana within &#91;**&#93; following the end of such Calendar Quarter.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.7.9&#160;&#160;&#160;&#160;Expiration of Royalty Term</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  For clarity, on a Licensed Product-by-Licensed Product and country-by-country basis, once the Royalty Term for such Licensed Product has expired in such country (a) with respect to the Global Royalties under Section 11.7.1 (Global Royalties), in the Territory&#59; or (b) with respect to the GSK Territory Royalties under Section 11.7.2 (GSK Territory Royalties), in the GSK Territory, as applicable, (i) Net Sales of such Licensed Product in such country will not be included in the calculation of aggregate annual Net Sales used to determine the royalty rate pursuant to Section 11.7.1 (Global Royalties) or Section 11.7.2 (GSK Territory Royalties), as applicable and (ii) GSK will have a non-exclusive, fully-paid, royalty-free, perpetual, irrevocable right and license, with the right to grant sublicenses, under the Mersana Technology, to continue to make, have made, use, sell, offer to sell and import such Licensed Product in the Field in such country.  For the avoidance of doubt, if Mersana exercises its Profit Share Right pursuant to Section 9.1.1 (Exercise of Profit Share Election), then this Section 11.7.9 (Expiration of Royalty Term) shall not apply with respect to the Shared Territory.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.8&#160;&#160;&#160;&#160;Mersana Upstream Agreement Payments</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, as between the Parties during the Collaboration Term&#58;</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.8.1&#160;&#160;&#160;&#160;Existing Mersana Upstream Agreement Payments</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Except for Third Party Licensing Payments under any Mersana Upstream Agreement included as Allowable Expenses, GSK will be responsible for (a) any of the milestone payments or royalties set forth on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 11.8.1(A)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> that become due and payable to &#91;**&#93; pursuant to the Mersana &#91;**&#93; Agreement&#59; and (b) except to the extent that the Mersana &#91;**&#93; Agreement is assigned to GSK pursuant to Section 2.7.1 (&#91;**&#93;), any of the milestone payments and royalties set forth on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 11.8.1(B)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> that become due and payable to &#91;**&#93; under the Mersana &#91;**&#93; Agreement&#59; in each case ((a) or (b)), to the extent that such payments arise as a result of Mersana&#8217;s or GSK&#8217;s (or its Affiliates&#8217; or Sublicensee&#8217;s) </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-108-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Development, Manufacture or Commercialization of the Licensed Compound or any Licensed Product under this Agreement&#59; provided, however, that GSK shall not be entitled to credit such payments against the Royalties due to Mersana with respect to Net Sales of a Licensed Product pursuant to Section 11.7.5 (Third Party Payments).  GSK shall pay Mersana for such amounts in accordance with the corresponding payment terms set forth in this Article 11 (Financial Provisions) (</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">e.g</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">., Section 11.6.4 (Milestone Payment Terms) with respect to any milestone payments or Section 11.7.8 (Royalty Reporting) with respect any royalty payments), as applicable, but, in each case, (i) subject to GSK&#8217;s receipt of an invoice from Mersana in accordance with Section 11.9.2 (Invoicing) and (ii) to the extent that such amounts are set forth on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 11.8.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.8.2&#160;&#160;&#160;&#160;New Mersana Upstream Agreement Payments</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If Mersana enters into a New Mersana Upstream Agreement, and GSK elects to receive a sublicense under such New Mersana Upstream Agreement, in each case, pursuant to Section&#160;13.6.2 (New Mersana Upstream Agreements), then, except for Third Party Licensing Payments under any Mersana Upstream Agreement included as Allowable Expenses, GSK will be responsible for its pro rata share of any payments due under such New Mersana Upstream Agreement as mutually agreed by the Parties with respect thereto pursuant to Section 13.6.2 (New Mersana Upstream Agreements) as a result of Mersana&#8217;s or GSK&#8217;s (or its Affiliates&#8217; or Sublicensee&#8217;s) Exploitation of the Licensed Compound or any Licensed Product under this Agreement&#59; provided, however, that GSK shall be entitled to credit &#91;**&#93; percent (&#91;**&#93;%) of any such payments against the Royalties due to Mersana with respect to Net Sales of a Licensed Product in accordance with Section 11.7.5 (Third Party Payments) (subject to Section 11.7.6 (Royalty Floor)).  Notwithstanding anything to the contrary set forth herein, as between the Parties, Mersana shall be fully responsible for any and all milestone payments, royalties or other payment obligations due and payable under any New Mersana Platform Agreement, including any such payment obligations that may become due and payable to any Third Party under any New Mersana Platform Agreement as a result of GSK&#8217;s (or its Affiliates&#8217; or Sublicensee&#8217;s) Exploitation of the Licensed Compound or any Licensed Product under this Agreement.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.9&#160;&#160;&#160;&#160;Payment Terms</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.9.1&#160;&#160;&#160;&#160;General Payment Terms</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  All payments made by a Party (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Payor</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) to the other Party (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Payee</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) hereunder shall be made by deposit of US Dollars in the requisite amount by electronic wire transfer of immediately available funds directly to such bank account as the Payee may from time to time designate by reasonable notice to the Payor.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.9.2&#160;&#160;&#160;&#160;Invoicing</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  To the extent an invoice is required to be submitted to a Party hereunder, such invoice shall include the information set forth in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule&#160;11.9.2</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.9.3&#160;&#160;&#160;&#160;Accounting Standards</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Each Party shall promptly notify the other Party if such Party changes the Accounting Standards pursuant to which such Party&#8217;s records are maintained, it being understood that each Party may only use internationally recognized accounting principles (</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">e.g.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, IFRS, GAAP)&#59; &#91;**&#93;.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-109-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.9.4&#160;&#160;&#160;&#160;Currency Conversion</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Except as otherwise agreed by the Parties, all payments to be made by either Party to the other Party under this Agreement shall be made by such Party or its Affiliate in U.S. Dollars to the account designated by the Party to which the relevant payment is due.  In the case of any amounts designated in another currency, then each Party shall convert such foreign currency into U.S. Dollars using its standard conversion method consistent with its applicable Accounting Standard in a manner consistent with the respective Party&#8217;s customary and usual conversion procedures used in preparing its audited financial reports applied on a consistent basis, provided that such procedures use a widely accepted source of published exchange rates.  With respect to Licensed Products for which Allowable Expenses are shared by the Parties &#91;**&#93;.  In addition, the Parties shall share equally (50&#58;50) any Currency Gains or Losses incurred on making payment of the Balancing Payments or other reconciliation payments related to the sharing of Development Costs in accordance Section 11.4 (Sharing of Development Costs) or the sharing of Pre-Tax Profit or Loss in accordance with Section 11.5 (Pre-Tax Profit or Loss).  Such Currency Gains or Losses are calculated on the difference between the Balancing Payment invoice for the Calendar Quarter &#91;**&#93; and the spot rate of invoice payment date (&#91;**&#93;).  A Party&#8217;s share of the currency gain or loss will be included as part of the &#91;**&#93; Calendar Quarter&#8217;s Development Costs Report pursuant to Section 11.4.1 (Reports&#59; Reconciliation Payments) or Pre-Tax Profit or Loss Report pursuant to Section 11.5.2 (Reporting Generally), as applicable.  For the avoidance of doubt, this Section 11.9.4 (Currency Conversion) shall not contravene the definition of &#8220;Currency Gains and Losses&#8221; as set forth in Section 1.75 (Currency Gains and Losses).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.9.5&#160;&#160;&#160;&#160;Blocked Payments</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If, by reason of Applicable Laws in any country, it becomes impossible or illegal for a Party or its Affiliate to transfer, or have transferred on its behalf, payments to the other Party, such Party shall promptly notify the other Party of the conditions preventing such transfer and such payments shall be deposited in local currency in the relevant country to the credit of the other Party in a recognized banking institution designated by the other Party or, if none is designated by the other Party within a period of &#91;**&#93; following the date of such notice, in a recognized banking institution selected by such Party or its Affiliate, as the case may be, and identified in a notice given to the other Party.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.9.6&#160;&#160;&#160;&#160;Late Payments</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Without limiting either Party&#8217;s remedies under this Agreement, any undisputed payments or portions thereof due hereunder that are not paid on the date such payments are due under this Agreement shall bear interest at a rate equal to &#91;**&#93; percentage points above the prime rate as published by Citibank, N.A., New York, New York, or any successor thereto, at 12&#58;01 a.m. on the first day of each Calendar Quarter in which such payments are overdue, calculated on the number of days such payment is delinquent.  Where the late payment is caused by the Party that is owed the payment, including for reasons such as failure to communicate in a timely-manner changes to bank details, or failure to respond to communications from the Party owing the payment regarding the interpretation or dispute of the terms of such payment, then no interest will be payable by the Party owing the payment.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-110-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.10&#160;&#160;&#160;&#160;Tax Matters</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Each Party will make all payments to each other under this Agreement without deduction or withholding for Taxes except to the extent that any such deduction or withholding is required by Applicable Law in effect at the time of payment.  The Parties shall reasonably cooperate with one another to reduce, minimize or eliminate any such deduction or withholding required by Applicable Law, including by providing reasonable advance notice of such deduction or withholding and by providing any information, forms or other certifications necessary to reduce or eliminate the amount of such withholding.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.10.1&#160;&#160;&#160;&#160;Tax Withholding</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;Any Tax required to be withheld on amounts payable under this Agreement will promptly be paid by the Payor Party on behalf of the Payee to the appropriate governmental authority, and Payor will furnish Payee with proof of payment of such Tax.  Any such Tax required to be withheld will be treated for all purposes of this Agreement as having been paid to the Party with respect to which such withholding was made.  The Payor will provide the Payee with prompt written notice of the required withholding (and, in any event, no later than &#91;**&#93; prior to making such payment.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;Mersana warrants that Mersana is resident for tax purposes in the United States of America and that Mersana is entitled to relief from United Kingdom income tax under the terms of the double tax agreement between the UK and the United States of America.  Mersana shall notify GSK immediately in writing if Mersana ceases to be entitled to such relief.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;Pending receipt of formal certification from the UK Tax Authority, GSK may pay royalty income and any other payments under this Agreement to Mersana by deducting tax at a rate specified in the double tax treaty between the United Kingdom and the United States of America.  Mersana agrees to indemnify and hold harmless GSK against any loss, damage, expense or liability arising in any way from a breach of the above warranties or any future claim by a Tax Authority or other similar body alleging that GSK was not entitled to deduct withholding Tax on such payments at source at the treaty rate.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(d)&#160;&#160;&#160;&#160;Notwithstanding any provision to the contrary in this Agreement, if a Payor assigns, transfers or otherwise disposes of some or all of its rights and obligations to any Person (without the prior written consent of the Payee) that is tax resident in a jurisdiction other than the jurisdiction of the Payor and if, as a result of such action (or as a result of a subsequent transfer following such assignment, transfer or disposition), the withholding or deduction of tax required by Applicable Law with respect to payments under this Agreement is increased (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Increased Withholding Taxes</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), then any amount payable to the Payee under this Agreement shall be increased to take into account such Increased Withholding Taxes as may be necessary so that, after making all required withholdings (including withholdings on the withheld amounts), the Payee receives an amount equal to the sum it would have received had no such Increased Withholding Taxes been made&#59; provided, however, that the parties shall cooperate to </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-111-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">reduce, minimize or eliminate such withholding or deduction in accordance with this the provisions of this Section 11.10 (Tax Matters).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.10.2&#160;&#160;&#160;&#160;VAT</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Any amount payable by one Party to the other under this Agreement is deemed to be exclusive of any amount in respect of any VAT chargeable on the supply for which that sum is the consideration (in whole or in part) for VAT purposes.  If anything done by one Party under this Agreement constitutes, for VAT purposes, the making of a supply to the other Party and VAT is or becomes chargeable on that supply, the supplier Party shall provide a valid VAT invoice to the other Party and such other Party shall pay such supplier Party, in addition to any amount otherwise payable under this Agreement, a sum equal to the amount of the VAT chargeable on that supply, subject to receipt of a valid VAT invoice, provided, however, that in the case where GSK is paying any amount hereunder to Mersana for which VAT applies under Applicable Law, then GSK shall (a) advise Mersana of such obligation, (b)  either (i) self assess such VAT and remit such amounts to the applicable tax authority, or (ii) provide a calculation of the applicable amount due to Mersana so it may invoice such amount, and (iii) the Parties shall cooperate with each other to ensure proper and full compliance with VAT rules and regulations.  Any VAT payable on the consideration shall be paid at the applicable rate on the later of (x) the due date of the payment or provision of the consideration to which it relates, or (b) &#91;**&#93; after the receipt by the payor of an invoice setting forth the amount of the applicable VAT&#59; it being understood and agreed that, if any amount of VAT is determined to be chargeable in respect of a payment at some date later than payment of any invoice (whether or not such VAT was identified at the time of the payment), or due to subsequent assessment from the applicable tax authority, the payor Party shall pay such VAT at the applicable rate in respect of such payment following such subsequent receipt of an invoice at such time as such later invoice is received.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.10.3&#160;&#160;&#160;&#160;No Partnership</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Nothing contained in this Agreement shall be deemed or construed by the Parties, any of their Affiliates or any third person to treat the relationship between the Parties contemplated by this Agreement as a partnership, joint venture or other business entity under Treasury Regulations Section 301.7701-1(a)(2) (or any corresponding provision under state, local or non-U.S. tax law) (an &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Entity</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  No Party (or successor or assignee) intends, for Tax purposes, on reporting the relationships established by this Agreement as an Entity, including either (a) making any disclosure that the relationships established by this Agreement may give rise to an Entity (whether on a U.S. Internal Revenue Service Form 8275 or otherwise) or (b) withholding any amounts from payments made to the other Party pursuant to Section 1446 of the Code (or any corresponding provision under state, local or non-U.S. tax law), unless required by a Tax Authority on audit or other examination.  Notwithstanding the foregoing, if the arrangement between the Parties as contemplated by this Agreement is determined to constitute an Entity under Applicable Law (as determined based on the opinion (on a &#8220;should&#8221; basis) of a nationally recognized law or accounting firm) or by a Tax Authority on audit or other examination, the Party that is aware of such determination shall provide notice to the other Party regarding such treatment and the Parties will reasonably cooperate with one another to satisfy any tax filing or reporting obligation arising as a result of such determination, including by providing </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-112-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">any information, forms or other certifications necessary to satisfy such obligations.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.11&#160;&#160;&#160;&#160;Audits</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.11.1&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Each Party shall, and shall require that its Affiliates and Sublicensees, keep complete and accurate records of the items underlying Development Costs and, in the case in which the Parties are sharing Pre-Tax Profit or Loss, Allowable Expenses and Other Income, including the number of FTEs (or portion thereof) used to determine Development FTE Costs and Commercial FTE Costs hereunder, and GSK shall, and shall require that its Affiliates and Sublicensees, keep complete and accurate records of Net Sales (for any royalty-bearing Licensed Products hereunder and for calculation of Pre-Tax Profit or Loss as applicable).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.11.2&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Each Party will have the right, at its own expense and no more frequently than &#91;**&#93; period (except in the case of fraud), to have an independent, certified public accountant, selected by such Party from nationally reputable accounting firms in the United States or the United Kingdom and reasonably acceptable to the other Party, review any such records of the other Party in the location(s) where such records are maintained by the other Party upon &#91;**&#93; prior written notice, at a time agreed to by the Parties and during regular business hours and under obligations of confidentiality, for the sole purpose of verifying the basis and accuracy of payments made under this Agreement, with respect to any Calendar Year ending not more than &#91;**&#93; prior to the request of the auditing Party.  If the review of such records reveals that the audited Party has failed to accurately report financial information required to be reported hereunder, or to make any payment (or portion thereof) required under this Agreement, or that such audited Party overcharged the auditing Party, then the audited Party shall pay to the auditing Party any undisputed underpaid or overcharged amounts due hereunder together with interest calculated in the manner provided in Section 11.9.6 (Late Payments) within &#91;**&#93; following receipt of an invoice for such amounts in accordance with Section 11.9.2 (Invoicing).  If any such discrepancies are greater than &#91;**&#93; percent (&#91;**&#93;%) of the amounts actually due for the audited period, then the audited Party shall pay all reasonable costs incurred in conducting such review.  Once a Party has conducted a review and audit of the other Party pursuant to this Section 11.11 (Audits) in respect of any given period, it may not subsequently re-inspect the other Party&#8217;s records in respect of such period, unless a subsequent audit of a separate reporting period uncovers fraud on the part of the audited Party that is reasonably expected to have been occurring during the prior audited period.  For clarity, however, if a discrepancy is identified by the accountant during the course of an audit and the Parties do not agree upon a resolution of such discrepancy, then the auditing Party&#8217;s accountant may re-inspect the books and records to the extent reasonably relevant to resolving such discrepancy.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.11.3&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Unless otherwise defined or stated, financial terms shall be calculated by the accrual method under the applicable Party&#8217;s Accounting Standards.  Financial records related to the foregoing shall be maintained (in such form as may be available) by each Party for a period of no less than &#91;**&#93; following the end of the period to which they pertain.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-113-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.12&#160;&#160;&#160;&#160;Disclaimer</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Mersana and GSK each acknowledge and agree that nothing in this Agreement will be construed as representing any estimate or projection of (a) the successful Development or Commercialization of any Licensed Product under this Agreement, (b) if Commercialized, that any Licensed Product will achieve any particular pricing or reimbursement amount or any particular sales level, or (c) anticipated sales or the actual value of any Licensed Product that may be successfully Developed or Commercialized under this Agreement.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.13&#160;&#160;&#160;&#160;Cooperation on Inter-Party Structure</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The Parties will reasonably cooperate to establish or facilitate an optimal inter-Party financial operational structure (including, if necessary, procedures and agreements among the various Affiliates of the Parties) which is consistent with the economic processes contemplated herein, consistent to the extent feasible with each Party&#8217;s internal structures and procedures, and not adverse to the Parties&#8217; financial, economic, or tax positions.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.14&#160;&#160;&#160;&#160;Financial Disputes</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.14.1&#160;&#160;&#160;&#160;Resolution of Financial Disputes</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If a Party has a dispute, claim or controversy relating to calculation or reconciliation of (a) Development Costs or (b) (i) Net Sales, (ii) Allowable Expenses, or (iii) Other Income, as each (i) through (iii) relates to the calculation or reconciliation of Development Costs or under the Pre-Tax Profit or Loss Schedule, such Party shall provide such other Party with a written notice setting forth in reasonable detail the nature and factual basis for such good-faith dispute and each Party agrees that it shall seek to resolve such dispute through the Financial Working Group.  If the Financial Working Group is unable to resolve such dispute within &#91;**&#93; following the date that such written notice is received, then the dispute shall be referred to the JSC for resolution.  If the JSC is unable to reach resolution within &#91;**&#93; following referral of such dispute to the JSC, then the dispute shall be resolved in accordance with the procedures set forth in Article 18 (Dispute Resolution), except that the Parties may agree to instead resolve the dispute in accordance with Section 11.14.2 (Specific Financial Disputes).  Any disputed portion of any payment shall be paid by the responsible Party within &#91;**&#93; following the date (if any) on which the Financial Working Group or JSC, as applicable, determines that such payment is owed and receipt by such responsible Party of a valid invoice in accordance with Section 11.9.2 (Invoicing).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">11.14.2&#160;&#160;&#160;&#160;Specific Financial Disputes</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If the Parties are unable to reach a mutually acceptable resolution of any dispute falling within Section 11.14.1 (Resolution of Financial Disputes) as set forth therein, then the Parties may agree to submit such dispute for resolution to a certified public accounting firm jointly selected by each Party&#8217;s certified public accountants or to such other Person as the Parties shall mutually agree (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Finance Expert</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  If the Parties agree on such submission to a Finance Expert, then the decision of the Finance Expert shall be final, and the costs of such dispute resolution shall be borne by the Party that the Finance Expert has determined owes an amount to the other Party.  Any amounts due and payable by one Party to the other Party as a result of such resolution shall be paid or reimbursed by the owing Party within &#91;**&#93; following the applicable decision of the Finance Expert and receipt of a valid invoice in accordance with Section 11.9.2 (Invoicing).</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-114-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ARTICLE 12<br>CONFIDENTIALITY&#59; PUBLICATIONS AND PRESENTATIONS</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">12.1&#160;&#160;&#160;&#160;Confidentiality</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">12.1.1&#160;&#160;&#160;&#160;Confidential Information</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  It is understood and agreed by the Parties that, subject to Section 12.1.2(a) through Section 12.1.2(e), all reports, information, and data provided by a Party to the other Party or its Affiliates or representatives hereunder, including information regarding the scientific, regulatory or business affairs or other activities of the Disclosing Party, will be considered such Disclosing Party&#8217;s Confidential Information, including, with respect to GSK, any information, plans or budgets provided by GSK to the JSC, any Subcommittee or the CAC&#59; provided, however, that, notwithstanding anything to the contrary set forth herein, unless and to the extent any such information is or becomes available to the public (other than pursuant to a breach under this Article 12 (Confidentiality&#59; Publications and Presentations)&#58;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;with respect to any (i) &#91;**&#93; and (ii) &#91;**&#93;, (A) during Pre-Option Exercise Term, such &#91;**&#93;&#59; and (B) if GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, &#91;**&#93;&#59; and</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;(i) the terms of this Agreement, (ii) the Joint Development Plan and (iii) if Mersana exercises its Co-Promotion Right pursuant to Section 9.2.1 (Exercise of Co-Promotion Right), the Detailing Plan, in each case ((i) through (iii)), shall be the joint Confidential Information of both Parties and both Parties shall be deemed the Disclosing Party and the Receiving Party with respect thereto, and neither Party may rely on Section&#160;12.1.2(b) or Section 12.1.2(e) with respect thereto.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">12.1.2&#160;&#160;&#160;&#160;Obligations of Confidentiality and Non-Use</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Except to the extent expressly authorized by this Agreement or otherwise agreed by the Parties in writing, during the Term and for a period of &#91;**&#93; following termination or expiration thereof (provided that, with respect to any such Confidential Information which constitutes a trade secret of such Party under Applicable Law and is specifically identified by such Party as a trade secret to the other Party in writing during the Term, such obligations shall continue for as long as such Confidential Information remains a trade secret under Applicable Law), each Party will be obligated to keep confidential and not publish or otherwise disclose to a Third Party, and not to use, directly or indirectly, for any purpose, any of the other Party&#8217;s Confidential Information furnished or otherwise made known to it, directly or indirectly, by the other Party, except to the extent such disclosure or use is expressly permitted by the terms of this Agreement or is reasonably necessary or useful for the performance of such Party&#8217;s obligations, or the exercise of such Party&#8217;s rights under, this Agreement.  The confidentiality and non-use obligations with respect to the Disclosing Party&#8217;s Confidential Information in this Agreement will not include any information (and such information will not be considered Confidential Information) that the Receiving Party can show by competent written evidence&#58;</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-115-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;is or becomes part of the public domain or available to the public through no wrongful act, fault or negligence on the part of the Receiving Party&#59; </font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;was in the Receiving Party&#8217;s possession prior to initial disclosure by the Disclosing Party to the Receiving Party&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;is subsequently lawfully received by the Receiving Party from a Third Party who is not bound by any obligation of confidentiality to the Disclosing Party with respect to such information&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(d)&#160;&#160;&#160;&#160;has been published by a Third Party or otherwise enters the public domain or becomes available to the public through no fault of the Receiving Party in breach of its contractual obligations to the Disclosing Party under this Agreement&#59; or</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(e)&#160;&#160;&#160;&#160;was independently developed (outside the scope of this Agreement) by or for the Receiving Party without reference to or use of the Disclosing Party&#8217;s Confidential Information.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">12.1.3&#160;&#160;&#160;&#160;Authorized Disclosure</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The Receiving Party may disclose Confidential Information of the Disclosing Party to the extent that such disclosure is&#58;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;made in response to a valid order of a court or other Governmental Authority or, if, in the reasonable opinion of the Receiving Party&#8217;s legal counsel, such disclosure is otherwise required by Applicable Law, including by reason of filing with securities regulators (including the U.S. Securities and Exchange Commission) or any securities exchange on which securities issued by the Receiving Party or any of the Receiving Party&#8217;s Affiliate are traded&#59; provided that the Receiving Party shall, to the extent practicable and consistent with Applicable Law, first have given notice to the Disclosing Party of such order or other requirement and given the Disclosing Party a reasonable opportunity to quash such order or to obtain a protective order or confidential treatment&#59; provided, further, that the Confidential Information disclosed in response to such court or governmental order shall be limited to that information which is legally required to be disclosed in response to such court or governmental order&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;made by or on behalf of the Receiving Party to Regulatory Authorities as required in connection with any filing, application or request for Regulatory Approval for the Licensed Products as permitted by this Agreement&#59; provided that reasonable measures shall be taken to assure confidential treatment of such information to the extent practicable and consistent with Applicable Law&#59;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;made by or on behalf of the Receiving Party to a patent authority as may be reasonably necessary for purposes of obtaining a Patent in accordance with Section 13.2 (Prosecution and Maintenance)&#59; provided that reasonable measures shall be taken to assure confidential treatment of such information, to the extent such protection is available&#59; or</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-116-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(d)&#160;&#160;&#160;&#160;made by the Receiving Party to its attorneys, auditors, advisors, consultants or contractors, or existing or prospective collaboration partners, licensees, sublicensees, investors, acquirers, lenders, financing sources (including, in each case, in connection with any royalty factoring transaction) or other Third Parties, as may be necessary in connection with the performance of obligations, or exercise of rights, under this Agreement or as required under the terms of agreements with Third Parties (including such agreements with Third Parties relating to Other Components included in Combination Products), in each case, for the limited purpose of such collaboration, license, sublicense, financing or acquisition activities&#59; </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">provided</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> that such Persons shall be subject to obligations of confidentiality and non-use with respect to such Confidential Information no less restrictive than the obligations of confidentiality and non-use of the Receiving Party set forth herein.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">12.1.4&#160;&#160;&#160;&#160;Data Breach</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  When transferring Confidential Information, all communications between GSK and Mersana will use encryption methods agreed to by the Parties, if any.  Upon discovering any unauthorized disclosure, loss or theft of the Disclosing Party&#8217;s Confidential Information in the Receiving Party&#8217;s possession (a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Data Security Breach</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) the Receiving Party will send an e-mail to &#91;**&#93; (in the case of GSK as the Disclosing Party) or &#91;**&#93; (in the case of Mersana as the Disclosing Party) notifying the Disclosing Party.  The Parties shall work with each other in good faith to identify a root cause and remediate the Data Security Breach.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">12.1.5&#160;&#160;&#160;&#160;Injunctive Relief</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Each Party, as a Receiving Party, acknowledges and agrees that, due to the unique nature of a Disclosing Party&#8217;s Confidential Information, there may be no adequate remedy at law for any breach of its obligations hereunder and that any such breach may allow a Receiving Party or Third Parties unfairly to compete with the Disclosing Party, resulting in irreparable harm to the Disclosing Party.  Therefore, notwithstanding anything to the contrary in the provisions of Article 18 (Dispute Resolution), the Parties agree that, upon any such breach of this Article 12 (Confidentiality&#59; Publications and Presentations) by the Receiving Party, the Disclosing Party shall be entitled to seek appropriate equitable relief at the Disclosing Party&#8217;s option in either (a) a court of competent jurisdiction where such Disclosing Party resides, or (b) as provided in Article 18 (Dispute Resolution), as applicable, in addition to whatever remedies it might have at law in connection with any breach or enforcement of the Receiving Party&#8217;s obligations hereunder for the unauthorized use or release of any of the Disclosing Party&#8217;s Confidential Information.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">12.2&#160;&#160;&#160;&#160;Press Releases and Other Public Statements</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">12.2.1&#160;&#160;&#160;&#160;General</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Notwithstanding Section 12.1.1(b), each Party may&#58; (a) issue a public announcement of the execution of this Agreement in a form attached hereto as </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 12.2</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#59; (b) disclose the content of the Agreement to attorneys, auditors, advisors, consultants or contractors, or existing or prospective collaboration partners, licensees, sublicensees, shareholders, investors, acquirers, or lenders, for limited purposes under obligations of confidentiality and non-use no less restrictive than those in this Agreement&#59; (c) as necessary or required by securities regulators, the rules of any stock </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-117-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">exchange or as part of any listing of the securities of Mersana or GSK on any stock exchange&#59; or (d) make public statements that consist of information that has previously been made publicly available in accordance with this Agreement (so long as (i) such subsequent public statements are made without changes to the substantive information provided therein and (ii) the information provided therein is still considered accurate and non-misleading and has not been superseded by other subsequent information known by such Party).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">12.2.2&#160;&#160;&#160;&#160;Public Statements</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Except for any disclosure permitted under Section 12.1.3 (Authorized Disclosure) or publications permitted under Section 12.3 (Scientific Publications), as applicable, neither Party nor any of its Affiliates will make any public announcements, press releases, regulatory filing or other public disclosures, written or oral, whether to the public, the press, stockholders or otherwise, concerning this Agreement or the terms or the subject matter hereof, the performance hereof or the Parties&#8217; activities hereunder, or any results or Data arising hereunder (a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Public Statement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), except&#58; (a) with the prior written consent of the other Party (such consent not to be unreasonably withheld, conditioned or delayed&#59; provided that such consent may be conditioned upon certain reasonable restrictions as to the content or distribution of such Public Statement)&#59; or (b) for such Public Statements that, in the opinion of the counsel for the Party intending to make such Public Statement, are required to comply with Applicable Laws (including the regulations of any stock exchange) (a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Legal Requirement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), which shall contain &#91;**&#93;. Each Party agrees to provide the other Party with a copy of any proposed Public Statement as soon as reasonably practicable under the circumstances prior to its scheduled release&#59; provided that each Party shall provide the other with an advance copy of any such Public Statement at least &#91;**&#93; prior to its scheduled release, except to the extent not practicable under Applicable Law or under extraordinary circumstances when such notice is not possible (in which event the proposed Public Statement will still be provided to the other Party for comment before release (and the releasing Party shall use commercially reasonable efforts to provide at least &#91;**&#93; prior to the intended time of publication)).  Furthermore, each Party shall have the right to review and recommend changes to any such Public Statement and, except as otherwise required by Legal Requirement &#91;**&#93;.  Except with respect to Public Statements that consist of information that has previously been made publicly available in accordance with this Agreement (so long as (i) such subsequent public statements are made without changes to the substantive information provided therein and (ii) the information provided therein is still considered accurate and non-misleading and has not been superseded by other subsequent information known by such Party), each Party agrees in any event to give the other Party a reasonable opportunity (to the extent consistent with Legal Requirements) to review all Public Statements required by Legal Requirements to be filed with the Securities and Exchange Commission or similar body prior to submission of such filings, and will give due consideration to any reasonable comments by the non-filing Party relating to such filing, including the provisions of this Agreement for which confidential treatment should be sought.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">12.3&#160;&#160;&#160;&#160;Use of Name</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Notwithstanding any provision to the contrary set forth in this Agreement, nothing in this Agreement grants either Party a right to use the other&#8217;s name or logo in any press release, without first obtaining the other Party&#8217;s written consent.  Once a Party </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-118-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">has obtained the other Party&#8217;s written consent to use such other Party&#8217;s name or logo in a given manner (</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">e.g.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, a company pipeline graphic), such Party may continue to use such other Party&#8217;s name or logo in substantially similar manner without requiring any additional consent from such other Party, unless otherwise informed in writing by such other Party.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">12.4&#160;&#160;&#160;&#160;Scientific Publications</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">12.4.1&#160;&#160;&#160;&#160;Publication During Pre-Option Exercise Term</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  During the Pre-Option Exercise Term, if Mersana or any of its Affiliates or Third Party subcontractors (including any personnel thereof) desires to make a publication relating to a Clinical Trial for a Licensed Product that is being conducted under the Initial Development Plan or that otherwise relates to the Licensed Compound or any Licensed Products or the activities conducted with respect thereto, then Mersana shall submit a copy of the proposed publication or presentation (including manuscripts, abstracts, posters, slides, scheduled interviews or the like) to the DAC and GSK&#8217;s Patent Liaison at least &#91;**&#93; (or, with respect to any abstract, at least &#91;**&#93;) prior to any submission or disclosure to any Third Party to allow the Parties (via the DAC) to review and discuss such proposed publication or presentation.  GSK shall provide the DAC with its comments, if any, in writing within &#91;**&#93; (or, with respect to any abstract, within &#91;**&#93;) following receipt of such proposed publication and Mersana shall consider in good faith any comments provided by GSK with respect to such proposed publication, including whether to delay submission of such proposed publication to permit the preparation and filing of a patent application as needed to preserve the patentability of any Mersana Know-How that is specifically related to the Licensed Compound or any Licensed Product or any Confidential Information of GSK (or any of its Affiliates or Sublicensees).  Mersana shall have the final decision regarding publications or presentations during the Pre-Option Exercise Term, but, upon GSK&#8217;s request, Mersana shall remove any and all of GSK&#8217;s Confidential Information from any proposed publication or presentation &#91;**&#93;.  Once any such publication is accepted for publication, Mersana shall provide GSK with a copy of the final version of such publication.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">12.4.2&#160;&#160;&#160;&#160;Publication During Collaboration Term</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;If GSK exercises its Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, within &#91;**&#93; following the establishment of the JDC pursuant to Section 10.2.1 (Establishment of JDC), the JDC will prepare a global publication strategy for the Development activities related to the Licensed Compound and Licensed Products Developed under the Collaboration (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Publication Strategy</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) that is consistent with each Party&#8217;s Internal Policies.  The JDC (with consultation from the Patent Liaisons, where applicable) will review and approve such Publication Strategy and may update it from time to time as required to comply with each Party&#8217;s Internal Policies.  The Parties shall have no right to publish in relation to any Development activities conducted hereunder other than as specified in the Publication Strategy or otherwise in this Section&#160;12.4.2 (Publication During Collaboration Term)&#59; provided that either Party shall have the right to re-publish (in accordance with Section 12.4.2(d)) or reference any publication (or information therein) </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-119-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">previously published in accordance with the Publication Strategy.  Without limiting the Party&#8217;s right to disclose top-line results pursuant to a Public Statement issued in accordance with Section 12.2.1 (Press Releases and Other Public Statements) to the extent necessary to comply with relevant Legal Requirements, if a Party or its employees or consultants (such as clinical investigators) desires to make a publication relating to a Clinical Trial for a Licensed Product that is being conducted under the Joint Development Plan or that otherwise relates to the Licensed Compound or any Licensed Product, or the activities conducted hereunder, subject to Section 12.4.2(e), then it shall make such request to the other Party through the JDC, and such publication shall be subject to review in accordance with Section 12.4.2(b) and the consent of such other Party (such consent not to be unreasonably withheld, conditioned or delayed).  &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;Subject to Section 12.4.2(d) or Section 12.4.2(e), as applicable, except as required by Applicable Law or court order, any proposed scientific or medical publications or scientific or medical presentations covered by Section 12.4.2(a) will be subject to the provisions of this Section&#160;12.4.2(b).  For any such publication or presentation, the publishing Party shall submit a copy of the proposed publication or presentation (including manuscripts, abstracts, posters, slides, scheduled interviews or the like) and any reasonably requested additional information to the representative of the other Party designated to receive such proposed publications at least &#91;**&#93; (or, with respect to any abstract, at least &#91;**&#93;) prior to any submission or disclosure to any Third Party to allow the other Party to review such proposed publication or presentation.  The reviewing Party shall provide the publishing Party with its comments, if any, in writing within &#91;**&#93; (or, with respect to any abstract, within &#91;**&#93;) following receipt of such proposed publication.  The publishing Party shall consider in good faith any comments thereto provided by the reviewing Party and shall comply with the reviewing Party&#8217;s request to remove any and all of the reviewing Party&#8217;s Confidential Information from the proposed publication.  In addition, upon the reviewing Party&#8217;s reasonable request, the publishing Party shall delay the submission for a period up to &#91;**&#93; to permit the preparation and filing of a patent application as needed to preserve the patentability of any Confidential Information of such reviewing Party.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;Each Party will ascribe authorship of any proposed publication under Section 12.4.2(b) using accepted standards used in peer-reviewed, academic journals at the time of the proposed publication.  Any publication or disclosure made by either Party pursuant to Section&#160;12.4.2(b) shall contain appropriate acknowledgements of the contribution of the other Party or any Third Party to the Development activities that are the subject of such publication, in accordance with generally accepted academic practice.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(d)&#160;&#160;&#160;&#160;Once a publication or presentation has been reviewed and approved by the non-publishing Party in accordance with Section 12.4.2(b), the publishing Party may use the information contained in the publication or presentation without seeking further approval so long as (i) such </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-120-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">subsequent publications or presentations are released without changes to the substantive information provided therein and (ii) the information provided therein is still considered accurate and non-misleading and has not been superseded by other subsequent information known by such Party.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(e)&#160;&#160;&#160;&#160;Notwithstanding anything to the contrary, during the Term following the expiration of the Development Term, as between the Parties, (i) GSK shall have the exclusive right to, and the sole decision-making authority in all matters relating to, all publications or presentations with respect to the Licensed Compound or any Licensed Product (or the Exploitation thereof), including the right to make any publications or presentations regarding the Licensed Compound or any Licensed Product (or the Exploitation thereof) in its sole discretion, without requiring any review or approval of Mersana in advance of such publication or presentation&#59; provided that, once any such publication is accepted for publication, GSK shall provide Mersana with a copy of the final version of such publication, and (ii) Mersana shall have no right to make any such publication or presentation without GSK&#8217;s prior written consent, in its sole discretion.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(f)&#160;&#160;&#160;&#160;Each publication made in accordance with this Section 12.4.2 (Publication During Collaboration Term) shall not be a breach of the confidentiality provisions contained in Section 12.1 (Confidentiality).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">12.4.3&#160;&#160;&#160;&#160;Publication of Clinical Information</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Notwithstanding the provisions of this Article 12 (Confidentiality&#59; Publications and Presentations), each Party shall have the right at any time during and after the Term to (a) publish the results or summaries of results of all Clinical Trials conducted by such Party with respect to any and all Licensed Products in any clinical trial register maintained by such Party or its Affiliates and the protocols of such clinical studies on www.clinicaltrials.gov or in each case publish the results, summaries or protocols of such Clinical Trials on such other websites or repositories or at scientific congresses and in peer-reviewed journals within such timescales as required by Applicable Law, irrespective of the outcome of such clinical studies&#59; and (b) with respect to GSK, make information and Data from Clinical Trials conducted by or on behalf of GSK with respect to a Licensed Compound or Licensed Product available under the Data Sharing Initiative.  </font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ARTICLE 13<br>INTELLECTUAL PROPERTY</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.1&#160;&#160;&#160;&#160;Ownership of Intellectual Property</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.1.1&#160;&#160;&#160;&#160;Background Patents and Know-How</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to the licenses granted by each Party to the other Party under this Agreement, Mersana shall retain all of its rights, title and interests in, to and under the Mersana Background Technology, and GSK shall retain all of its rights, title and interests in, to and under the GSK Background Technology.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.1.2&#160;&#160;&#160;&#160;Inventorship</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  For purposes of this Agreement, the determination of inventorship of any inventions included in the Arising Know-How (including </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-121-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">any Arising Patent that claims such Arising Know-How) shall be made in accordance with United States patent law, regardless of where the applicable activities occurred.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.1.3&#160;&#160;&#160;&#160;GSK Arising Technology</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  As between the Parties, from and after the License Effective Date, GSK shall be the sole owner of all rights, title and interests in and to any (a) Product-Specific Arising Know-How and Product-Specific Arising Patents and (b) GSK Solely-Developed Arising Technology.  Effective as of the License Effective Date, Mersana will, and hereby does, assign to GSK, without additional consideration, all of its rights, title and interest in and to any Product-Specific Arising Know-How that is first discovered, developed, generated, invented, derived or created by or on behalf of Mersana or any of its Affiliates, either solely or jointly with GSK or any of its Affiliates (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Assigned Product-Specific Arising Know-How</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) and any Product-Specific Arising Patent that claims any such Assigned Product-Specific Arising Know-How (each, an &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Assigned Product-Specific Arising Patent</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">,&#8221;), and GSK hereby accepts such assignment.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.1.4&#160;&#160;&#160;&#160;Mersana Arising Technology</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  As between the Parties, Mersana shall be the sole owner of all rights, title and interests in and to any (a) Platform-Specific Arising Know-How and Platform-Specific Arising Patents and (b) Mersana Solely-Developed Arising Technology.  GSK will, and hereby does, assign to Mersana, without additional consideration, all of its rights, title and interest in and to each Platform-Specific Arising Know-How that is first discovered, developed, generated, invented, derived or created by or on behalf of GSK or any of its Affiliates, either solely or jointly with Mersana or any of its Affiliates (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Assigned Platform-Specific Arising Know-How</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) and any Platform-Specific Arising Patent that claims any such Assigned Platform-Specific Arising Know-How (each, an &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Assigned Platform-Specific Arising Patent</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), and Mersana hereby accepts such assignment.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.1.5&#160;&#160;&#160;&#160;Joint Arising Technology</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to any rights or licenses that are expressly granted by one Party to the other Party under this Agreement, each Party will have an undivided one-half (1&#47;2) interest in and to the Joint Arising Technology.  Each Party will, and hereby does, assign to the other Party, without additional consideration, an equal, undivided interest in and to all of its rights, title and interests in and to such Joint Arising Technology, and such other Party hereby accepts such assignment.  Except to the extent either Party is restricted by the licenses granted by one Party to the other Party pursuant to this Agreement (including pursuant to Section 4.1 (License Grants to GSK)), or the covenants contained herein (including pursuant to Section 4.5 (Exclusivity)), each Party shall be entitled to practice and license the Joint Arising Technology without restriction and without consent of, or (subject to the financial provisions of this Agreement) an obligation to account to the other Party (and, to the extent necessary by way of Applicable Laws of any jurisdiction regarding joint ownership of intellectual property rights, each Party grants the other Party the right and license to do the same), and each Party hereby waives any right it may have under Applicable Laws to require any such consent or accounting.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.1.6&#160;&#160;&#160;&#160;Assignment Obligation</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Each Party shall cause all employees, independent contractors, consultants and others who perform activities for such Party or its Affiliates under this Agreement to be under an obligation to assign (or, if such </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-122-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Party is unable to cause such Person to agree to such assignment obligation despite such Party using Commercially Reasonable Efforts to negotiate such assignment obligation, provide an exclusive, perpetual, irrevocable, worldwide license under) their rights in and to any Arising Know-How, Arising Patents and all other intellectual property rights therein to such Party (or to an entity that is obligated to assign such rights to such Party), except where Applicable Law requires otherwise and except in the case of governmental, not-for-profit and public institutions that have standard policies against such an assignment (in which case a Party shall obtain a suitable license, or right to obtain such a license).  Further, each Party acknowledges and agrees that it will not intentionally take any action or make any statement that contradicts or negates any such assignment of Arising Know-How, Arising Patents or any other intellectual property rights by its employees, independent contractors, consultants or others who perform activities for such Party under this Agreement.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.1.7&#160;&#160;&#160;&#160;Disclosure</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  During the Term, (a) Mersana will disclose to GSK any inventions within the Assigned Product-Specific Arising Know-How or Joint Arising Know-How of which Mersana or any of its Affiliates becomes aware&#59; and (b) GSK will disclose to Mersana any inventions within the Assigned Platform Specific-Arising Know-How or Joint Arising Know-How of which GSK or any of its Affiliates become aware, in each case ((a) or (b)), such disclosure shall (i) be made promptly and in any event reasonably prior to the filing of any patent application with respect to such Arising Know-How and (ii) include all invention disclosures or other similar documents submitted to such Party by its or its Affiliates&#8217; employees, independent contractors, or other agents relating thereto.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.2&#160;&#160;&#160;&#160;Prosecution and Maintenance</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.2.1&#160;&#160;&#160;&#160;Pre-Option Exercise Term</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  During the Pre-Option Exercise Term, the terms of this Section 13.2.1 (Pre-Option Exercise Term) shall apply.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;Except as set forth in Section 13.2.1(b) or Section 13.2.1(c), as between the Parties, during the Pre-Option Exercise Term, Mersana shall have the sole right, but not the obligation, to prepare, file, prosecute and maintain the Mersana Patents at its sole cost and expense and using counsel of its own choice&#59; provided, however, that Mersana shall keep GSK reasonably informed &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;During the Pre-Option Exercise Term, the Parties shall jointly agree on the preparation, filing, prosecution and maintenance of any Joint Arising Patents, using counsel mutually selected by the Parties, with all Patent Costs incurred in connection therewith to be shared equally by the Parties.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;Notwithstanding Section 13.2.1(a), promptly following the Effective Date, the Parties (through their respective Patent Liaisons) shall &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.2.2&#160;&#160;&#160;&#160;Collaboration Term</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises the Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, during the Collaboration Term, the terms of this Section 13.2.2 (Collaboration Term) shall apply.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-123-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;Subject to Section 13.2.2(e), as between the Parties, (i) GSK shall have the first right, but not the obligation, to prepare, file, prosecute and maintain any Joint Arising Patents, Assigned Product-Specific Arising Patents or Mersana Product-Related Patents (collectively, the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Prosecuted Patents</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) and (ii) Mersana shall have the sole right but not the obligation, to prepare, file, prosecute and maintain any Mersana Patent that is not a Joint Arising Patent or Mersana Product-Related Patent (collectively, the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Prosecuted Patents</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;The Patent Liaison for the Party responsible for preparation, filing, prosecution and maintenance of &#91;**&#93; a given GSK Prosecuted Patent or &#91;**&#93; (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Controlling Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), using counsel of its own choice, shall keep the other Party&#8217;s Patent Liaison reasonably informed on a regular basis regarding such activities, including by providing copies of any material communications or correspondence received from relevant patent authorities to such other Party&#8217;s Patent Liaison, and, without limiting the generality of the foregoing, provide the other Party&#8217;s Patent Liaison with a copy of any proposed filing or correspondence with any patent authority, unless otherwise agreed in writing by the Parties, at least &#91;**&#93; prior to the anticipated filing or submission date thereof to allow such other Party to have a reasonable opportunity to comment and consult on, all such filings or correspondence, and the Controlling Party shall consider any reasonable comments of the other Party with respect thereto in good faith.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;With respect to any GSK Prosecuted Patent, as long as GSK is the Controlling Party, Mersana will cooperate with GSK, including furnishing a power of attorney, inventor declaration or assignment documentation, to allow preparation, prosecution, maintenance or defense activities with respect to such GSK Prosecuted Patents to be carried out effectively and expeditiously.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(d)&#160;&#160;&#160;&#160;With respect to any Mersana Background Patent listed on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule&#160;1.222</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> filed in the &#91;**&#93;, to the extent that such &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(e)&#160;&#160;&#160;&#160;With respect to any GSK Prosecuted Patent in any country in the Territory, GSK will give reasonable notice to Mersana, unless otherwise agreed in writing by the Parties, but in any event at least &#91;**&#93; advance written notice, before determining to abandon the prosecution or maintenance of such Patent and, upon receipt of such notice, Mersana shall have the right to elect, by delivery of written notice to GSK within &#91;**&#93;, to assume, and thereafter shall have the right to control, the prosecution and maintenance of such Patent in such country, in which case, GSK shall provide reasonable assistance in connection with transferring of the prosecution and maintenance of such Patent to Mersana.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(f)&#160;&#160;&#160;&#160;As between the Parties, GSK shall have the sole decision-making authority, after consulting the Mersana Patent Liaison, to determine which of the Patents that Cover the Licensed Product are extended with respect to U.S. Drug Price Competition and Patent Term Restoration Act of 1984, the Supplementary Certificate of Protection </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-124-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">of Member States of the EU, and other similar measures in any other country&#59; except that GSK may not, without Mersana&#8217;s prior written consent, extend any Mersana Patent that is not a Mersana Product-Related Patent or a Joint Arising Patent.  Mersana and GSK shall each cooperate and use Commercially Reasonable Efforts to gain such patent term extension in the U.S. and Major European Countries.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.2.3&#160;&#160;&#160;&#160;GSK Sole Prosecution Patents</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  As between the Parties, GSK shall have the sole right, but not the obligation, in its sole discretion, using counsel of its own choice, to pursue and direct the preparation, filing, prosecution and maintenance of any GSK Background Patents and any GSK Arising Patents that are not Assigned Product-Specific Arising Patents or Joint Arising Patents) (collectively, the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Sole Prosecution Patents</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) and shall have no obligation to keep Mersana informed with respect to such activities.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.2.4&#160;&#160;&#160;&#160;Patent Costs</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Except as otherwise agreed by the Parties, the Party controlling the preparation, filing, prosecution and maintenance of a given Patent pursuant to this Section 13.2 (Prosecution and Maintenance) shall be responsible for all Patent Costs incurred in connection therewith.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.3&#160;&#160;&#160;&#160;Enforcement Rights</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.3.1&#160;&#160;&#160;&#160;Notification of Infringement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If either Party learns of any infringement or threatened or suspected infringement, or misappropriation or threatened or suspected misappropriation, of any (a) Mersana Technology by the Manufacture, use, Development or Commercialization by a Third Party of a product that competes with a Licensed Product, including any notification of the submission of an Abbreviated Biologic License Application wherein a Licensed Product is the &#8220;Reference Product&#8221; under the BPCIA or receipt of manufacturing process from a subsection (k) applicant or other similar procedure where a response is required under Applicable Law (in order to avoid waiving rights)&#59; or (b) any Joint Arising Patent or Assigned Product-Specific Arising Patent, whether or not such Third Party infringement is by a product that competes with a Licensed Product (each of (a) and (b), an &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Infringement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), such Party shall promptly, but in any event within ten (10) Business Days of becoming aware of such Infringement, provide notice to the Patent Liaisons describing such Infringement (each, an &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Infringement Notice</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  For clarity, except as expressly set forth in Section 13.3.2 (Enforcement), Mersana retains all rights to enforce the Mersana Technology&#59; &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.3.2&#160;&#160;&#160;&#160;Enforcement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;As between the Parties, GSK shall have the initial right, but not the obligation, to pursue and direct enforcement of any GSK Prosecuted Patent against any Infringement.  If GSK decides not to abate such Infringement by way of enforcing one or more applicable GSK Prosecuted Patent(s) against the relevant Third Parties, then GSK shall inform Mersana of such decision in writing no later than &#91;**&#93; after GSK first becomes aware of such Infringement.  Upon receiving such notice from GSK (or, if no such action to abate such Infringement is taken within such &#91;**&#93; period, following the expiry of such &#91;**&#93; period, as applicable), then Mersana shall thereafter have the right, but </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-125-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">not the obligation, to pursue and direct enforcement of the applicable GSK Prosecuted Patent(s) against such Infringement&#59; &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;As between the Parties, Mersana shall have the sole right, but not the obligation, to pursue and direct enforcement of any Mersana Prosecuted Patent against any Infringement.  &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;The Party enforcing against any Infringement under this Section 13.3.2 (Enforcement) (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Enforcing Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) will (i) keep the other Party reasonably informed through the Patent Liaisons on a regular basis regarding enforcement of the applicable Patent(s), and (ii) provide such other Party with reasonable opportunity to consult and comment on all enforcement activities and materials in respect of the applicable Patent(s).  The non-Enforcing Party shall have the right, to the extent permitted by Applicable Laws and procedural rules to join, using its own counsel, as a party to the enforcement actions included in such enforcement activities.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(d)&#160;&#160;&#160;&#160;Any damages or other monetary awards recovered from the settlement of, or judgment from, enforcement actions under this Section 13.3.2 (Enforcement) shall be allocated first to reimburse the Parties for the costs and expenses incurred by them in connection with such enforcement actions.  &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(e)&#160;&#160;&#160;&#160;If an Enforcing Party brings an enforcement action or proceeding in accordance with this Section 13.3.2 (Enforcement), then the other Party shall cooperate as reasonably requested in the pursuit of such enforcement action, including, if necessary, by joining as a party to any such enforcement action for which it is a necessary or indispensable party or taking such other actions as are necessary for standing, furnishing a power of attorney, or for the Enforcing Party to otherwise maintain or pursue such enforcement action effectively and expeditiously.</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(f)&#160;&#160;&#160;&#160;The Enforcing Party that brings an enforcement action or proceeding in accordance with this Section 13.3.2 (Enforcement) shall also have the right to control the settlement of the applicable enforcement action&#59; provided that the Enforcing Party shall not admit the unenforceability or invalidity of Patents Controlled by the other Party or its Affiliates, or of Patents within the Joint Arising Technology, or that otherwise materially adversely affects the other Party&#8217;s interest in the Mersana Technology or the Joint Arising Technology, in all cases, without such other Party&#8217;s prior written consent (such consent not to be unreasonably withheld, conditioned or delayed).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.3.3&#160;&#160;&#160;&#160;Enforcement of GSK Sole Prosecution Patents</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  As between the Parties, GSK shall have the sole right to pursue and direct, at its own cost and discretion, the enforcement of all GSK Sole Prosecution Patents.  Any damages or other monetary awards recovered from the settlement of or judgment from such enforcement actions shall be retained by GSK&#59; &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.4&#160;&#160;&#160;&#160;Infringement Claims by Third Parties</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-126-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.4.1&#160;&#160;&#160;&#160;Notice&#59; Control</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Each Party shall promptly notify the other Party in writing of any allegation by a Third Party that any Development, Manufacture or Commercialization or other activities with respect to any Licensed Product infringes or misappropriates, or may infringe or misappropriate, the intellectual property rights of such Third Party (a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Third Party Infringement Claim</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  Each Party shall have the right to control the defense of the Third Party Infringement Claim brought against such Party.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.4.2&#160;&#160;&#160;&#160;Cooperation&#59; Settlement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Each Party shall keep the other Party reasonably informed of all material developments in connection with any Third Party Infringement Claim through the Patent Liaisons.  Such Party shall provide the other Party with copies of all filings by, or correspondence from, the counterparty(ies) in any suit or proceeding relating to such Third Party Infringement Claim, and with copies of proposed filings to be filed, or material correspondence to be delivered to such counterparty(ies), by the Party defending such Third Party Infringement Claim in such proceedings at least &#91;**&#93; prior to the anticipated filing or delivery date thereof for the other Party to comment on, and the Party defending such Third Party Infringement Claim shall take all such comments received under good faith consideration.  The Party defending such Third Party Infringement Claim may enter into a settlement or compromise of any Third Party Infringement Claim, </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">provided</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> that, if such settlement or compromise would admit liability on the part of the other Party or any of its Affiliates or would otherwise have a material adverse effect on the rights or interests of the other Party or its Affiliates (including by imposing any monetary obligation upon the other Party or its Affiliates or by limiting the scope of or admitting the unenforceability or invalidity of Patents owned or exclusively licensed by the other Party or its Affiliates), then such Party shall not enter into such settlement or compromise without the prior written consent of the other Party.  Any counterclaims of Infringement shall be handled as set forth in Section 13.3 (Enforcement Rights).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.4.3&#160;&#160;&#160;&#160;Costs&#59; Recoveries</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  All out-of-pocket expenses incurred by a Party in defending a Third Party Infringement Claim (including outside counsel fees), and all amounts payable by either Party as a judgment based on a Third Party Infringement Claim or in settlement of such Third Party Infringement Claim, shall be borne by, or retained by, the Party defending such Third Party Infringement Claim, as applicable&#59; provided, however, that, if Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), then, solely with respect to Third Party Infringement Claims directed to the activities conducted hereunder for the Licensed Products in the Shared Territory, such out-of-pocket expenses will be shared by the Parties in accordance with the Pre-Tax Profit or Loss in accordance with Section 11.5 (Pre-Tax Profit or Loss Sharing).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.5&#160;&#160;&#160;&#160;Patent Lists Under the BPCIA</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If GSK exercises the Option pursuant to Section 3.8 (Exercise of Option and License Effective Date), then, during the Collaboration Term, as between the Parties, GSK will have sole decision-making authority with respect to the determination, as a reference product sponsor, of whether or not to privately exchange any GSK Prosecuted Patent or any GSK Sole Prosecution Patent, in each case, that Covers a Licensed Product or Licensed Compound, with a biosimilar applicant, and take other steps, pursuant to the requirements of the BPCIA&#59; &#91;**&#93;.  The Patent Liaison for each Party will discuss the selection of any such Patents to be used in accordance with the </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-127-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">requirements of the BPCIA, and GSK will consider the comments and concerns of Mersana&#8217;s Patent Liaisons in good faith prior to making its selections.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.6&#160;&#160;&#160;&#160;New Third Party In-Licenses</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  During the Term, if Mersana or any of its Affiliates intends to enter into any agreement or other arrangement with a Third Party pursuant to which Mersana (or its Affiliate) would in-license, or otherwise acquire rights, under any Patent or Know-How owned or otherwise controlled by such Third Party (whether by acquisition or by license) that is both (a) necessary or useful to Exploit the Mersana Platform and (b) necessary or useful to Exploit the Licensed Compound or any Licensed Product in the Field in the Territory, then, subject to compliance with Section 13.6.1 (New Mersana Platform Agreements), Section 13.6.2 (New Mersana Upstream Agreements) and Section 13.6.3 (Additional Third Party IP), as applicable, &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.6.1&#160;&#160;&#160;&#160;New Mersana Platform Agreements</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  With respect to any such agreement or other arrangement with a Third Party pursuant to which Mersana (or any of its Affiliates) would in-license or otherwise acquire rights under any such Patent or Know-How that is necessary or useful to Exploit any and all compounds and products that use the Mersana Platform, then Mersana (or any of its Affiliates) shall have the right to enter into such New Mersana Platform Agreement &#91;**&#93;&#59; except that, if such Patent or Know-How is necessary for the Exploitation of the Licensed Compound or any Licensed Product in the Field in the Territory, then Mersana shall ensure that (a) such Patent or Know-How is automatically included in the Mersana Technology licensed to GSK under this Agreement at no additional cost to GSK (provided that Mersana shall promptly identify such Patent or Know-How to GSK&#8217;s Patent Liaison, together with a summary of the scope of such license grant)&#59; and (b) as between the Parties, Mersana remains fully responsible for all milestone payments, royalties or other amounts due and payable to any Third Party under such agreement or other arrangement as a result of GSK&#8217;s (or its Affiliates&#8217; or Sublicensee&#8217;s) Exploitation of the Licensed Compound or any Licensed Product under this Agreement (each such agreement or other arrangement, if entered into by Mersana or its Affiliate, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">New Mersana Platform Agreement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.6.2&#160;&#160;&#160;&#160;New Mersana Upstream Agreements</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to Section 13.6.3 (Additional Third Party IP), with respect to any such agreement or other arrangement with a Third Party pursuant to which Mersana (or any of its Affiliates) would in-license or otherwise acquire rights under any such Patent or Know-How, other than a New Mersana Platform Agreement (each such agreement, if entered into by Mersana or its Affiliate, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">New Mersana Upstream Agreement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;)&#58;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;if Mersana expressly excludes from the scope of the licenses or other rights granted to Mersana (or its Affiliate) under such New Mersana Upstream Agreement &#91;**&#93;&#59; or</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;if Mersana does not expressly exclude from the scope of the licenses or other rights granted to Mersana (or its Affiliate) under such agreement or other arrangement &#91;**&#93;, then, prior to Mersana (or any of its Affiliates) entering into such New Mersana Upstream Agreement, Mersana &#91;**&#93; the relevant Know-How or Patent(s) owned or otherwise controlled by such Third Party that Mersana (or its Affiliate) proposes to in-license and otherwise acquire rights under pursuant to such proposed New Mersana Upstream Agreement that are &#91;**&#93; to Exploit </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-128-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">the Licensed Compound or any Licensed Product in the Field in the Territory.  &#91;**&#93;.  If Mersana (or its Affiliate) is successful in obtaining such sublicensable licenses or rights under such New Mersana Upstream Agreement, then the relevant Know-How or Patents in-licensed or otherwise acquired by Mersana (or its Affiliate) pursuant to such New Mersana Upstream Agreement shall automatically be deemed Mersana Background Know-How or Mersana Background Patents (as applicable) and GSK shall comply, and shall cause its Affiliates and require its Sublicensees to comply, with any applicable obligations under such New Mersana Upstream Agreement applicable to GSK (or its Affiliates or Sublicensees) as a sublicensee thereunder and of which GSK was informed by Mersana in writing prior to Mersana (or its Affiliate) entering into such New Mersana Upstream Agreement, &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">13.6.3&#160;&#160;&#160;&#160;Additional Third Party IP</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Notwithstanding anything to the contrary set forth herein, during the Collaboration Term, except as set forth in Section 13.6.2(a), in no event shall Mersana enter into any New Mersana Upstream Agreement pursuant to which Mersana (or any of its Affiliates) would in-license or otherwise acquire rights under, (A) any Know-How owned or otherwise controlled by a Third Party that is specifically related to the Licensed Compound or any Licensed Product or (B) any Patents owned or otherwise controlled by a Third Party that specifically claim any such Know-How, the Licensed Compound or any Licensed Product, in each case, without GSK&#8217;s prior written consent.  &#91;**&#93;.</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ARTICLE 14<br>REPRESENTATIONS AND WARRANTIES AND COVENANTS</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.1&#160;&#160;&#160;&#160;Mutual Representations, Warranties and Covenants</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Each Party hereby represents and warrants to the other Party as of the Effective Date and as of the License Effective Date, and further covenants (where explicitly stated as a forward-looking covenant), that&#58;</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.1.1&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">such Party is an Entity duly organized, validly existing and in good standing under the Applicable Laws of the jurisdiction of its organization and has full corporate power and authority and legal right to execute, deliver and perform this Agreement&#59;</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.1.2&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">the execution and delivery of this Agreement and the performance by it of the transactions contemplated hereby have been duly authorized by all necessary corporate action, and do not violate (a) such Party&#8217;s charter documents, bylaws, or other organizational documents&#59; (b) any agreement, instrument, or contractual obligation to which such Party is bound&#59; (c) any requirement of any Applicable Law&#59; or (d) any order, writ, judgment, injunction, decree, determination, or award of any court or governmental agency presently in effect applicable to such Party&#59;</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.1.3&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">this Agreement is a legal, valid, and binding obligation of such Party enforceable against it in accordance with its terms and conditions, subject to the effects of bankruptcy, insolvency, or other laws of general application affecting the enforcement of creditor rights, judicial principles affecting the availability of specific performance, and general principles of equity&#59;</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-129-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.1.4&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">except for (a) any Regulatory Approvals necessary for the Development, Manufacture or Commercialization of the Licensed Compound and Licensed Products&#59; (b) any HSR Filings or Other Antitrust Filings that may be required, as contemplated under Section 3.8.2 (Antitrust Filings)&#59; (c) any required filing with the U.S. Securities and Exchange Commission or equivalent filings with regard to this transaction in other countries&#59; or (d) consents obtained on or prior to the Effective Date, no authorization, consent, approval, exemption of or filing or registration with any Governmental Authority under Applicable Law or with any other Person is or shall be necessary for, or in connection with, the entering of this Agreement or the transactions contemplated hereby&#59;</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.1.5&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">except with respect to the Loan Agreement, such Party is not under any obligation, contractual or otherwise, to any Person that conflicts with or is inconsistent in any material respect with the terms of this Agreement, or that would impede the diligent and complete fulfillment of its obligations hereunder&#59;</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.1.6&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">such Party and its Affiliates have not employed, and, during the Term, such Party covenants that it and its Affiliates will not knowingly employ, any Person debarred by the FDA (or subject to a similar sanction of EMA or foreign equivalent), or any Person who is the subject of an FDA debarment investigation or proceeding (or similar proceeding of EMA or foreign equivalent)&#59;</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.1.7&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">in connection with this Agreement, such Party covenants that it will respect the human rights of its staff and will not employ child labor, forced labor, unsafe working conditions, or cruel or abusive disciplinary practices in the workplace and will not discriminate against any workers on any ground (including race, religion, disability, gender, sexual orientation or gender identity), will pay each employee at least the minimum wage, provide each employee with all legally mandated benefits, and comply with the Applicable Laws on working hours and employment rights in the countries in which it operates, be respectful of its employees&#8217; right to freedom of association and encourage compliance with these standards by any supplier of goods or services that it uses in performing its obligations under this Agreement&#59;</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.1.8&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">such Party has complied with Applicable Laws relating to anti-corruption and anti-bribery, has not, prior to the Effective Date, as relevant to this Agreement, and such Party covenants that it will not, in connection with the performance of this Agreement, directly or indirectly, make, promise, authorize, ratify or offer to make, or take any act in furtherance of any payment or transfer of anything of value for the purpose of influencing, inducing or rewarding any act, omission or decision to secure an improper advantage, or improperly assist such Party in obtaining or retaining business, or in any way with the purpose or effect of public or commercial bribery, in each case in violation of any Applicable Laws, and such Party will require subcontractors, agents or any other Third Parties subject to its control or determining influence not to do any of the foregoing activities&#59;</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.1.9&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">such Party complies with and covenants that it will comply with all Applicable Laws relating to the collection, storage, use and disposal of Human Biological Samples to be used in the Development of Licensed Products, and  appropriate and adequate consent or ethics committee approval (as required by </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-130-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">such Applicable Laws) has been or will be obtained in respect of all Human Biological Samples to be collected, transferred, stored, used and disposed of for the purpose of the Development of Licensed Products by such Party&#59;</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.1.10&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">neither such Party nor any of its Affiliates is subject to, or bound by, any exclusivity provisions, non-compete provisions or other similar types of provisions or obligations pursuant to any agreement with a Third Party or otherwise that would limit or restrict in any way such Party or any of its Affiliates from Developing, Manufacturing or Commercializing the Licensed Compound or any Licensed Product as set forth herein, or granting the rights to the other Party to do so as set forth herein&#59; and</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.1.11&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">such Party covenants that it shall, and shall require its Affiliates and its and their respective subcontractors and Sublicensees to, conduct all activities undertaken pursuant to this Agreement in accordance with Applicable Laws, including entering into any data protection agreements required under applicable Data Protection Laws.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2&#160;&#160;&#160;&#160;Additional Representations, Warranties and Covenants of Mersana</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Except as qualified in </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 14.2</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> (as may be updated pursuant to Section 3.8.3 (Updates by Mersana)), Mersana further hereby represents and warrants to GSK, as of the Effective Date and as of the License Effective Date, and covenants (where explicitly stated as a forward-looking covenant), as follows&#58;</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.1&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">All Mersana Background Patents existing as of the Effective Date are listed on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 14.2.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Existing Mersana Background Patents</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  To the Knowledge of Mersana, all the issued claims included in the Existing Mersana Background Patents are subsisting and are not invalid or unenforceable, in whole or in part.  The Existing Mersana Background Patents represent all Patents within Mersana&#8217;s or its Affiliates&#8217; ownership or Control as of the Effective Date that claim or Cover the Licensed Compound or any Licensed Product, or the Exploitation thereof.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.2&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Mersana is the sole and exclusive owner of the entire right, title and interest in the Existing Mersana Background Patents listed on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 14.2.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, free of any encumbrance, lien, or claim of ownership by any Third Party.  Mersana is entitled to grant the Option and the licenses specified herein.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.3&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">No Third Party has any right under any agreement entered into by Mersana or any of its Affiliates and such Third Party, including a right of consent or a right of first negotiation, that would reasonably be expected to conflict with, be inconsistent with, or adversely affect in any material respect any of the rights or licenses granted to GSK hereunder (including the Option).  During the Term, Mersana covenants that Mersana and its Affiliates shall not, directly or indirectly, assign, transfer, convey, dispose of or otherwise encumber (including by grant of license or other rights), or enter into any grant or agreement with any Third Party to assign, transfer, convey, dispose of or otherwise encumber (including by grant of license or other rights), any Mersana Technology (or any intellectual property that would otherwise be included in the Mersana Technology) or any rights to the Licensed Compound or any Licensed Product, except to the extent such assignment, transfer, conveyance, disposal or other encumbrance would not conflict with, be inconsistent with, or adversely affect in any material respect any of the rights </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-131-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">or licenses granted to GSK hereunder (including the Option)&#59; provided, however, the foregoing covenant shall not apply with respect to (a) any encumbrance arising from the Loan Agreement (or any amendment, modification or replacement thereto as described in clause (b) below) solely to the extent such encumbrance is required under the Loan Agreement (in the form provided to GSK as of the Effective Date) or (b) any encumbrance arising from (i) any amendment or modification to the Loan Agreement or (ii) any new loan agreement entered into as a replacement of the Loan Agreement, in each case of (i) and (ii), solely to the extent the terms of such amendment, modification or replacement of the Loan Agreement are no more restrictive with respect to the foregoing covenant than are the relevant terms of the Loan Agreement (in the form provided to GSK as of the Effective Date).  </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.4&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Except for the Mersana &#91;**&#93; Agreement and the Mersana &#91;**&#93; Agreement, neither Mersana nor any of its Affiliates has entered into any agreements, either oral or written, with any Third Party pursuant to which Mersana owns or otherwise Controls any Mersana Technology, and Mersana has provided GSK with true, correct and complete copies of the Mersana &#91;**&#93; Agreement and the Mersana &#91;**&#93; Agreement.  Each of the Mersana &#91;**&#93; Agreement and the Mersana &#91;**&#93; Agreement is in full force and effect and neither Mersana nor any of its Affiliates is in breach or default under, nor, to the Knowledge of Mersana, is any counterparty thereto in breach of, either such agreement.  During the Term, Mersana covenants that Mersana and its Affiliates shall not amend, terminate or otherwise modify, or permit to be amended or modified (including by committing any acts or permitting the occurrence of any omissions that would cause the breach or termination of any Mersana Upstream Agreement)), any Mersana Upstream Agreement without GSK&#8217;s prior written consent, except to the extent such amendment, termination or modification would not conflict with, be inconsistent with, or adversely affect in any material respect any of the rights or licenses granted to GSK hereunder (including the Option).  During the Term, Mersana covenants that Mersana shall promptly provide GSK with notice of any alleged, threatened or actual breach of any Mersana Upstream Agreement.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.5&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Without limiting the other provisions of this Section 14.2 (Additional Representations, Warranties and Covenants of Mersana), subject to the other applicable terms and conditions of this Agreement, during the Pre-Option Exercise Term, Mersana covenants that Mersana shall, and shall cause its Affiliates to, operate and maintain the business and assets related to the Licensed Compound and any Licensed Product (including Patents and Know-How) in the ordinary course of business, and in compliance with Applicable Law, including not withdrawing any INDs or Regulatory Approvals related to the Licensed Compound or any Licensed Product except as required by Applicable Law or in the ordinary course of business.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.6&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Except with respect to the Mersana &#91;**&#93; Agreement and the Mersana &#91;**&#93; Agreement, in each case as set forth on </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 11.8.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, and except for amounts that may become payable to contractors on a fee-for-service basis, neither Mersana nor any of its Affiliates has any obligations to make any payments to Third Parties as a result of entering into this Agreement, or as a result of the grant of any of the rights or licenses granted to GSK under this Agreement or the exercise of any rights or licenses granted to GSK under this </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-132-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Agreement, including as a result of the Development, Manufacture or Commercialization of the Licensed Compound or any Licensed Product.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.7&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">The Existing Mersana Background Patents that are pending patent applications are being diligently prosecuted in the respective patent offices in the Territory in which they are pending, in accordance with Applicable Law and otherwise in compliance with all applicable duties of candor to the relevant patent office.  The Existing Mersana Background Patents have been filed and maintained consistent with commercially reasonable patent prosecution practice.  All applicable fees have been paid with respect to the Existing Mersana Background Patents on or before the due date for payment.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.8&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Neither Mersana nor any of its Affiliates owns or otherwise controls any Competing Product.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.9&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">To the Knowledge of Mersana, no Person is infringing or threatening to infringe or misappropriating or threatening to misappropriate any Mersana Background Patents or Mersana Background Know-How.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.10&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">There are no claims, judgments or settlements against, or amounts with respect thereto owed by, Mersana or any of its Affiliates relating to the Existing Mersana Background Patents or the Mersana Background Know-How.  No claim or litigation has been brought or, to the Knowledge of Mersana, threatened in writing by any Person that (a) any Existing Mersana Background Patent is invalid or unenforceable, or (b) the Development, Manufacture or Commercialization of the Licensed Compound or Licensed Products as contemplated herein will infringe or misappropriate any Patent or other intellectual property or proprietary right of any Person.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.11&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">There is no pending re-examination, opposition, interference, or patent litigation against Mersana or any of its Affiliates, and neither Mersana nor any of its Affiliates has received any written notice of any pending, alleged or threatened, re-examination, opposition, interference, or litigation, or any written communication, in each case, alleging that any issued Patent within the Mersana Patents is invalid or unenforceable anywhere in the world.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.12&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">All material adverse information with respect to the safety and efficacy of the Licensed Compound known to Mersana has been provided or made available to GSK prior to the Effective Date or the License Effective Date, as applicable.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.13&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">To the Knowledge of Mersana, Mersana and its Affiliates are in material compliance with (a) all Data Protection Laws&#59; (b) all privacy policies and other related policies, programs and other notices of Mersana (or its Affiliates, as applicable) relating to the privacy, protection and security of PII&#59; and (c) all contractual and other legal requirements to which Mersana (or its Affiliates, as applicable) is subject with respect to the privacy, protection, and security of PII&#59; in each case of (a) through (c), as applicable to Mersana&#8217;s (or its Affiliate&#8217;s, as applicable) operations and activities directly related to this Agreement or otherwise in connection with the Exploitation of the Licensed Compound or any Licensed Product, and, to the Knowledge of Mersana, Mersana has in place reasonable safeguards to protect the confidentiality and security of PII, including from unauthorized access or misuse, based on </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-133-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Applicable Law, as applicable to Mersana&#8217;s (or its Affiliate&#8217;s, as applicable) operations and activities directly related to this Agreement or otherwise in connection with the Exploitation of the Licensed Compound or any Licensed Product.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.14&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Mersana covenants that, in performing activities under this Agreement, it shall comply at all times in all material respects with all Applicable Laws, including anti-corruption laws, and that it has not, and covenants that it will not, in connection with the performance of this Agreement, directly or indirectly, make, promise, authorize, ratify or offer to make, or take any act in furtherance of any payment or transfer of anything of value for the purpose of influencing, inducing or rewarding any act, omission or decision to secure an improper advantage, or improperly assisting Mersana, GSK or any of their respective Affiliates in obtaining or retaining business, or in any way with the purpose or effect of public or commercial bribery, in each case in violation of any Applicable Laws, and warrants that it has taken reasonable measures to prevent Mersana&#8217;s (or its Affiliates&#8217;) subcontractors or agents, or any other Third Parties, subject to its control or determining influence, from doing so.  For the avoidance of doubt, this includes facilitating payments, which are unofficial, improper, small payments or gifts offered or made to Government Officials in violation of Applicable Laws to secure or expedite a routine or necessary action to which Mersana is legally entitled.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.15&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">To the Knowledge of Mersana, the conception and reduction to practice of any inventions, and the use or development of any other information, within the Mersana Background Know-How or the Existing Mersana Background Patents owned by Mersana have not constituted or involved the misappropriation of trade secrets of any Third Party.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.16&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">To the Knowledge of Mersana, each of the Existing Mersana Background Patents properly identifies each and every inventor of the claims thereof as determined in accordance with the laws of the jurisdiction in which such Existing Mersana Background Patent is issued or such application is pending.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.17&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">To the Knowledge of Mersana as of the Effective Date and the License Effective Date, the Parties&#8217; Development, Manufacture and Commercialization of the Licensed Compound or any Licensed Product under Development as of such dates as contemplated herein will not infringe any Patent or other intellectual property or proprietary right of any Person.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.18&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">All rights in all inventions and discoveries made, developed, or conceived by any employee or independent contractor of Mersana or any of its Affiliates during the course of their employment (or other retention) by Mersana or such Affiliate, and relating to or included in Mersana Background Know-How or that are the subject of one (1) or more Existing Mersana Background Patents have been or will be assigned in writing to Mersana or such Affiliate.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.19&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">To the Knowledge of Mersana, neither Mersana nor any of its Affiliates, nor any of its or their respective officers, employees, or agents has made an untrue statement of material fact or fraudulent statement to the FDA or any other Regulatory Authority with respect to the Development of the Licensed Compound or any Licensed Product, failed to disclose a material fact required to be disclosed to the FDA or any other Regulatory Authority with respect to </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-134-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">the Development of the Licensed Compound or any Licensed Product, or committed an act, made a statement, or failed to make a statement with respect to the Development of the Licensed Compound or any Licensed Product that could reasonably be expected to provide a basis for the FDA to invoke its policy respecting &#8220;Fraud, Untrue Statements of Material Facts, Bribery, and Illegal Gratuities&#8221;, set forth in 56 Fed. Reg. 46191 (September 10, 1991) and any amendments thereto or any analogous laws or policies in the Territory.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.20&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Mersana and its Affiliates have conducted, and their respective contractors and consultants have conducted, all Development of the Licensed Compound or any Licensed Product in accordance in all material respects with Applicable Law (including GLP and GCP).  Mersana has conducted, and has caused its contractors and consultants to conduct, any and all pre-clinical and Clinical Trials related to the Licensed Compound or any Licensed Product in accordance in all material respects with Applicable Law (including GLP and GCP).  Mersana and its Affiliates have generated, prepared, maintained, and retained all Regulatory Filings that are required to be maintained or retained pursuant to and in accordance with Applicable Law (including GLP and GCP), and, to the Knowledge of Mersana, all information contained therein is true and correct.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.21&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Solely with respect to the Licensed Product being Developed by Mersana as of the Effective Date, in the form in which it exists on the Effective Date, Mersana has provided to GSK, prior to the Effective Date or License Effective Date (as applicable), all material Data and information in Mersana&#8217;s or any of its Affiliates&#8217; Control regarding the quality, efficacy or safety of such Licensed Product.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.22&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">The inventions claimed or covered by the Existing Mersana Background Patents (a) were not invented in connection with any research activities funded, in whole or in part, by the federal government of the United States or any agency thereof, (b) are not a &#8220;subject invention&#8221; as that term is described in 35 U.S.C. Section 201(f), and (c) are not otherwise subject to the provisions of the Bayh-Dole Act.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.2.23&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">In response to any of GSK&#8217;s requests for information, either in connection with the due diligence and negotiation process with respect to this Agreement prior to the Effective Date or otherwise pursuant to this Agreement during the Pre-Option Exercise Period (as applicable), it has not intentionally made any untrue</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">statement of a material fact or</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%"> </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">intentionally omitted to provide or otherwise disclose to GSK any material information known to Mersana or any of its Affiliates at the time of such response.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">14.3&#160;&#160;&#160;&#160;Disclaimer of Warranty</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  EXCEPT FOR THE EXPRESS WARRANTIES SET FORTH HEREIN, NEITHER PARTY MAKES ANY REPRESENTATIONS OR GRANTS ANY WARRANTIES, EXPRESS OR IMPLIED, EITHER IN FACT OR BY OPERATION OF LAW, BY STATUTE OR OTHERWISE, AND EACH PARTY SPECIFICALLY DISCLAIMS ANY OTHER WARRANTIES, WHETHER WRITTEN OR ORAL, OR EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY OF QUALITY, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR USE OR PURPOSE OR ANY WARRANTY AS TO THE VALIDITY OF ANY PATENTS OR THE NON-INFRINGEMENT OF ANY INTELLECTUAL PROPERTY RIGHTS OF THIRD PARTIES.</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-135-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ARTICLE 15<br>INDEMNIFICATION</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">15.1&#160;&#160;&#160;&#160;Indemnification</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">15.1.1&#160;&#160;&#160;&#160;Indemnification by Mersana</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Mersana hereby agrees to indemnify, defend and hold harmless GSK and its Affiliates and their respective directors, officers, employees and agents, and the respective successors and assigns any of the foregoing (collectively, &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GSK Indemnitees</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), from and against any and all suits, claims, actions, demands, losses, damages, liabilities, settlements, penalties, fines, costs and expenses (including reasonable attorneys&#8217; fees and other expenses of litigation) (collectively, &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Losses</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) asserted by a Third Party to the extent arising from (a) any breach by Mersana or any of its Affiliates of its representations and warranties, covenants or obligations set forth in this Agreement, (b) a Mersana Indemnitee&#8217;s gross negligence or willful misconduct, or (c) the Development, Detailing or other Exploitation of the Licensed Compound or any Licensed Product by or on behalf of Mersana or its Affiliates (i) pursuant to this Agreement (including prior to the License Effective Date), (ii) prior to the Effective Date or (iii) following any termination of this Agreement, in each case ((a) through (c)), except to the extent that such Losses (A) arise out of any Product Claims relating to or asserted in the Shared Territory or are Third Party Infringement Costs with respect to the Shared Territory, or (B) are covered by GSK&#8217;s obligations under Section 15.1.2(a), Section 15.1.2(b) or Section 15.1.2(c), as applicable.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">15.1.2&#160;&#160;&#160;&#160;Indemnification by GSK</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  GSK hereby agrees to indemnify, defend and hold harmless Mersana and its Affiliates and their respective directors, officers, employees and agents, and the respective successors and assigns of any of the foregoing (collectively, &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Mersana Indemnitees</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), from and against any and all Losses asserted by a Third Party to the extent arising from (a) any breach by GSK or any of its Affiliates of its representations and warranties, covenants or obligations set forth in this Agreement, (b) a GSK Indemnitee&#8217;s gross negligence or willful misconduct, or (c) the Development, Commercialization or other Exploitation of the Licensed Compound or any Licensed Product by or on behalf of GSK or its Affiliates pursuant to this Agreement, in each case ((a) through (c)), except to the extent that such Losses (i) arise out of any Product Claims relating to or asserted in the Shared Territory or are Third Party Infringement Costs with respect to the Shared Territory, or (ii) are covered by Mersana&#8217;s obligations under Section 15.1.1(a), Section 15.1.1(b) or Section&#160;15.1.1(c), as applicable.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">15.1.3&#160;&#160;&#160;&#160;Indemnification Procedures</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Upon becoming aware or receipt of notice of any Third Party claim that may be subject to indemnification by the other Party (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Indemnifying Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) under this Section 15.1 (Indemnification), any GSK Indemnitee or any Mersana Indemnitee (each, an &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Indemnitee</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), as the case may be, shall promptly notify the Indemnifying Party in writing.  The Indemnifying Party shall have the right, but not the obligation, to conduct and control, through counsel of its choosing, any action for which indemnification is sought, and, if the Indemnifying Party elects to assume the defense thereof, the Indemnifying Party shall not be liable to the Indemnitee for any legal expenses of other legal counsel or any other expenses subsequently incurred by such Indemnitee in connection with the defense thereof.  The Indemnifying </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-136-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Party may settle any action, claim or suit for which the Indemnitee is seeking indemnification&#59; provided that, unless the proposed compromise or settlement does not diminish the rights or interests of the Indemnitee, admit any liability on the part of the Indemnitee, or obligate the Indemnitee to make any payment, take any action, or refrain from taking any action, the Indemnifying Party shall first give the Indemnitee advance notice of any proposed compromise or settlement and obtains such Indemnitee&#8217;s prior written approval (such approval not to be unreasonably withheld, conditioned or delayed).  The Parties and their employees shall cooperate fully with each other and their legal representatives in the investigation, defense, prosecution, negotiation, or settlement of any such claim or suit.  Each Party&#8217;s indemnification obligations under this Article 15 (Indemnification) shall not apply to amounts paid by an Indemnitee in settlement of any action with respect to a Third Party claim, if such settlement is effected without the prior written consent of the Indemnifying Party (such consent not to be unreasonably withheld, conditioned or delayed).  In no event shall the Indemnifying Party settle or abate any Third Party claim in a manner that would diminish the rights or interests of the Indemnitee, admit any liability on the part of the Indemnitee, or obligate the Indemnitee to make any payment, take any action, or refrain from taking any action, without the prior written approval of the Indemnitee.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">15.2&#160;&#160;&#160;&#160;Insurance</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">15.2.1&#160;&#160;&#160;&#160;Mersana&#8217;s Insurance Obligations</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Mersana shall maintain, at its cost, reasonable insurance against liability and other risks associated with its activities contemplated by this Agreement, including its indemnification obligations herein, in such amounts and on such terms as are determined to be advisable by Mersana, based on advice from insurance professionals, for companies of similar size and with similar resources for the activities to be conducted by it under this Agreement taking into account the scope of the activities for which Mersana is responsible hereunder.  Mersana shall furnish to GSK evidence of such insurance, upon reasonable request.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">15.2.2&#160;&#160;&#160;&#160;GSK&#8217;s Insurance Obligations</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  GSK shall maintain, at its cost, insurance or self-insurance with respect to liabilities and other risks associated with its activities and obligations under this Agreement, including its indemnification obligations herein, in such amounts and on such terms as are customary for prudent practices for large companies in the pharmaceutical industry for the activities to be conducted by GSK under this Agreement.  GSK shall furnish to Mersana evidence of such insurance or self-insurance, upon reasonable request.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">15.3&#160;&#160;&#160;&#160;LIMITATION OF CONSEQUENTIAL DAMAGES</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  NOTWITHSTANDING ANYTHING TO THE CONTRARY IN THIS AGREEMENT, TO THE MAXIMUM EXTENT PERMITTED BY LAW, EXCEPT WITH RESPECT TO (A) A PARTY&#8217;S INDEMNIFICATION OBLIGATIONS UNDER SECTION 15.1 (INDEMNIFICATION), (B) A BREACH OF A PARTY&#8217;S OBLIGATIONS UNDER SECTION 4.5 (EXCLUSIVITY) OR (C) A BREACH OF A PARTY&#8217;S CONFIDENTIALITY OR NON-USE OBLIGATIONS IN ARTICLE 12 (CONFIDENTIALITY&#59; PUBLICATIONS AND PRESENTATIONS), NEITHER MERSANA NOR GSK, NOR ANY OF THEIR AFFILIATES OR SUBLICENSEES WILL BE LIABLE TO THE OTHER PARTY TO THIS AGREEMENT, ITS </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-137-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">AFFILIATES OR ANY OF THEIR SUBLICENSEES, FOR ANY INCIDENTAL, CONSEQUENTIAL, SPECIAL, PUNITIVE OR OTHER INDIRECT DAMAGES, INCLUDING LOST PROFITS, LOST DATA OR COST OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, WHETHER LIABILITY IS ASSERTED IN CONTRACT, TORT (INCLUDING NEGLIGENCE AND STRICT PRODUCT LIABILITY) OR CONTRIBUTION, AND IRRESPECTIVE OF WHETHER THAT PARTY OR ANY REPRESENTATIVE OF THAT PARTY HAS BEEN ADVISED OF, OR OTHERWISE MIGHT HAVE ANTICIPATED THE POSSIBILITY OF, ANY SUCH LOSS OR DAMAGE.</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ARTICLE 16<br>TERM AND TERMINATION</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">16.1&#160;&#160;&#160;&#160;Term</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">16.1.1&#160;&#160;&#160;&#160;General</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to Section 16.1.2 (Expiration Following Non-Exercise of Option), this Agreement shall become effective on the Effective Date and, unless earlier terminated pursuant to this Article 16 (Term and Termination), will continue in full force and effect, on a Licensed Product-by-Licensed Product and country-by-country basis, until the date of expiration of all payment obligations under this Agreement with respect to such Licensed Product in such country, including, if Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), until the date on which there are no remaining Development Costs or Pre-Tax Profit or Loss sharing obligations in the Shared Territory (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Term</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">16.1.2&#160;&#160;&#160;&#160;Expiration Following Non-Exercise of Option</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Notwithstanding Section&#160;16.1.1 (General), if GSK does not exercise the Option prior to the expiration of the Option Exercise Period, then the Term shall automatically expire on the day immediately following the expiration of the Option Exercise Period.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">16.1.3&#160;&#160;&#160;&#160;Effect of Expiration of the Term</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Upon expiration (but not the earlier termination) of this Agreement following the License Effective Date, (a) with respect to a given Licensed Product in a given country, the license grants to GSK pursuant to Section 4.1 (License Grant to GSK) with respect to such Licensed Product in such country shall become fully paid-up, perpetual, irrevocable and royalty-free&#59; or (b) with respect to this Agreement in its entirety, all license grants granted to GSK under this Agreement, including pursuant to Section 4.1 (License Grant to GSK), shall become fully paid-up, perpetual, irrevocable and royalty-free with respect to all Licensed Products.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">16.2&#160;&#160;&#160;&#160;Termination by GSK for Convenience</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  GSK may, at its sole discretion, elect to terminate this Agreement, for any or no reason, following the License Effective Date, (a) upon not less than &#91;**&#93; prior written notice to Mersana if such notice is provided prior to receipt of the first Marketing Approval for a Licensed Product, and (b) upon not less than &#91;**&#93; prior written notice to Mersana if such notice is provided following receipt of the first Marketing Approval for a Licensed Product.  </font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">16.3&#160;&#160;&#160;&#160;Termination for Material Breach</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If either Party believes that the other Party has materially breached this Agreement (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Breaching Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), then such Party (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Non-Breaching Party</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;) may deliver notice of such material breach to the Breaching Party (a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Default Notice</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  If the Breaching Party does not dispute that it has committed such </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-138-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">material breach, then, if the Breaching Party fails to cure such material breach within &#91;**&#93; (or, with respect to payment breaches, &#91;**&#93;) following receipt of the Default Notice (provided that, in the event of a material breach other than a payment breach, if such cure cannot reasonably be achieved within such &#91;**&#93; period, then, if the Breaching Party provides the Non-Breaching Party with a cure plan that is reasonably acceptable to the Non-Breaching Party and diligently executes such plan, such &#91;**&#93; period shall be automatically extended for an additional &#91;**&#93;), the Non-Breaching Party may terminate this Agreement upon written notice to the Breaching Party.  If the Breaching Party disputes that it has materially breached this Agreement, the dispute shall be resolved pursuant to Article 18 (Dispute Resolution).  If, as a result of the application of such dispute resolution procedures, the Breaching Party is finally determined to be in material breach of this Agreement (an &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Adverse Ruling</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), and if the Breaching Party fails to cure such material breach within &#91;**&#93; following such Adverse Ruling (or such longer period as established by the arbitrators in such final determination), then the Non-Breaching Party may terminate this Agreement upon written notice to the Breaching Party.  </font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">16.4&#160;&#160;&#160;&#160;Termination for Patent Challenge</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Except to the extent the following is unenforceable under Applicable Laws of a particular jurisdiction where the applicable Mersana Patents are pending or issued, if GSK or any of its Affiliates or Sublicensees, without the prior written consent of Mersana, voluntarily commences, or affirmatively requests that any Third Party commence, or voluntarily assists any Third Party in commencing or participating in, proceedings (whether before an administrative body or a court) anywhere in the Territory alleging that any claim in any Mersana Patent is invalid, unenforceable, or otherwise not patentable (each a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Patent Challenge</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), then Mersana shall have the right to terminate the license granted to GSK pursuant to Section 4.1 (License Grant to GSK) &#91;**&#93; on &#91;**&#93; written notice to GSK unless&#58; (a) GSK or its applicable Affiliate or Sublicensee withdraws or otherwise terminates (or causes to be withdrawn or otherwise terminated) such Patent Challenge within &#91;**&#93; following receipt of such notice from Mersana &#91;**&#93;&#59; (b) such Patent Challenge is part of a defense or counterclaim against a claim that GSK or the applicable Affiliate or Sublicensee is infringing such Mersana Patent or otherwise as part of a defense of any claims raised by Mersana or its Affiliate or licensee against GSK or any of its Affiliates or Sublicensees&#59; (c) such Patent Challenge is commenced or assisted by a New Affiliate of GSK and such New Affiliate was participating in such Patent Challenge prior to becoming an Affiliate of GSK&#59; (d) such Patent Challenge is due to GSK or its applicable Affiliate responding to a court request, subpoena or order, or an administrative agency request or order, or the applicable proceedings are initiated by a patent office and not at the instigation of GSK or any of its Affiliates or Sublicensees&#59; (e) such proceedings are commenced or assisted by a Sublicensee (and not GSK or any of its Affiliates) and GSK or its applicable Affiliate promptly terminates such Sublicensee&#8217;s sublicense to any Mersana Patent (in all cases within &#91;**&#93; of the commencement of such proceeding)&#59; or (f) GSK or its applicable Affiliate or Sublicensee is merely making arguments that distinguish the inventions claimed in any Patent controlled by GSK or its applicable Affiliate or Sublicensee from those claimed in any Patent Controlled by Mersana in the ordinary course of </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">ex parte</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> prosecution of such Patents.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">16.5&#160;&#160;&#160;&#160;Termination for Insolvency</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If either Party (a) files for protection under bankruptcy or insolvency laws&#59; (b) makes an assignment for the benefit of creditors&#59; (c) appoints or suffers appointment of a receiver or trustee over substantially all of its property that is not discharged within &#91;**&#93; following such filing&#59; (d) proposes a written agreement of composition or extension of its debts&#59; (e) proposes or is a party to any dissolution or liquidation&#59; (f) files a petition under any bankruptcy or insolvency act or has any such petition filed against that is not discharged within &#91;**&#93; of the filing thereof&#59; or (g) admits </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-139-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">in writing its inability generally to meet its obligations as they fall due in the general course, then the other Party may terminate this Agreement effective immediately upon notice to such Party.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">16.6&#160;&#160;&#160;&#160;Termination for Lack of Antitrust Clearance</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If the Clearance Date has not occurred on or before the date that is (a) &#91;**&#93; following the latest date on which both Parties have made their respective HSR Filings and Other Antitrust Filings, GSK shall have the right to terminate this Agreement immediately on notice to Mersana&#59; or (b) &#91;**&#93; following the latest date on which both Parties have made their respective HSR Filings and Other Antitrust Filings, either Party shall have the right to terminate this Agreement immediately on notice to the other Party&#59; &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">16.7&#160;&#160;&#160;&#160;Certain Additional Remedies of GSK in Lieu of Termination</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to Section 3.6.3, if, at any point during the Term, GSK has the right to terminate this Agreement pursuant to Section 16.3 (Termination for Material Breach), then in lieu of GSK terminating pursuant to Section&#160;16.3 (Termination for Material Breach), GSK may elect to have this Agreement continue in full force and effect as modified by this Section 16.7 (Certain Additional Remedies of GSK in Lieu of Termination) by providing written notice to Mersana prior to the date that otherwise would have been the effective date of termination had GSK exercised its right to terminate this Agreement under Section 16.3 (Termination for Material Breach).  If GSK elects to continue this Agreement in accordance with this Section&#160;16.7 (Certain Additional Remedies of GSK in Lieu of Termination), then, from and after such time as GSK delivers such written notice to Mersana, all Milestone Payments or Royalties thereafter payable by GSK to Mersana hereunder, shall be reduced by &#91;**&#93; percent (&#91;**&#93;%) of the amounts otherwise due and payable by GSK with respect to any Licensed Products pursuant to Article 11 (Financial Provisions).  &#91;**&#93;.</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ARTICLE 17<br>EFFECTS OF EXPIRATION OR TERMINATION</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">17.1&#160;&#160;&#160;&#160;Effects of Termination</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If either Party terminates this Agreement prior to expiration of the Term pursuant to Article 16 (Term and Termination), then the provisions of this Section&#160;17.1 (Effects of Termination) will apply.  All of the effects of termination are in addition to the other rights and remedies that may be available to either of the Parties under this Agreement and will not be construed to limit any such rights or remedies.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">17.1.1&#160;&#160;&#160;&#160;Return of Confidential Information</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  At the written request of the Disclosing Party following the termination of this Agreement, the Receiving Party shall (and shall cause its Affiliates and their respective representatives to), at the Receiving Party&#8217;s election, either promptly return to the Disclosing Party or destroy (and provide the Disclosing Party with certification of destruction of) all originals of documents (in paper or electronic form) and physical materials then in its possession, and copies thereof, to the extent containing the Disclosing Party&#8217;s Confidential Information (which is not also considered to be the Receiving Party&#8217;s Confidential Information), and destroy (and provide the Disclosing Party with certification of destruction of) all documents and other materials that it created to the extent including any such Confidential Information&#59; </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">provided</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> that the Receiving Party may retain in confidence (a) one (1) archival copy of the Disclosing Party&#8217;s Confidential Information in its legal files solely to permit the Receiving Party to determine compliance with its obligations hereunder&#59; (b) any portion of the Confidential Information of the Disclosing Party which is contained in the Receiving </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-140-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Party&#8217;s laboratory notebooks, regulatory documentation, automatic computer backups or otherwise that cannot reasonably be returned or destroyed&#59; (c) any portion of the Confidential Information of the Disclosing Party which the Receiving Party is required by Applicable Law to retain&#59; and (d) any Confidential Information of the Disclosing Party that the Receiving Party has the right to continue to use (including in satisfying its obligations under this Article 17 (Effects of Expiration or Termination) or in exercising its rights that survive expiration or termination of this Agreement) (including, with respect to Mersana as the Receiving Party, to exercise the rights and licenses granted to it under Section&#160;17.1.3 (Termination Following Option Exercise Date)), as applicable.  Notwithstanding the return or destruction of the documents and tangible items described above, the Parties will continue to be bound by their obligations under Section 12.1 (Confidentiality).  For the avoidance of doubt, following expiration or termination of this Agreement, the Know-How described in Section 12.1.1(a) shall no longer be deemed to be Confidential Information of GSK.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">17.1.2&#160;&#160;&#160;&#160;Milestone Payments</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Notwithstanding anything to the contrary contained herein, if notice of termination is given hereunder prior to achievement of a given Near Term Milestone Event, Development Milestone Event, Regulatory Milestone Event or Sales Milestone Event, as applicable, GSK shall not be obligated to make any Milestone Payment to Mersana with respect to any such Milestone Event achieved following the effective date of such termination.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">17.1.3&#160;&#160;&#160;&#160;Termination Following License Effective Date</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Notwithstanding anything to the contrary in the foregoing provisions of this Section 17.1 (Effects of Termination), if this Agreement is terminated at any time following the License Effective Date, the terms of this Section 17.1.3 (Termination Following License Effective Date) shall apply&#58;</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(a)&#160;&#160;&#160;&#160;Subject to Section 17.3 (Accrued Rights&#59; Surviving Obligations), all rights and licenses granted by each Party to the other Party hereunder shall immediately terminate, except to the extent necessary to give effect to the transition set forth in this Section 17.1.3 (Termination Following Option Exercise Date).</font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(b)&#160;&#160;&#160;&#160;Upon any termination of this Agreement&#58; </font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(1)&#160;&#160;&#160;&#160;GSK shall assign, and hereby does assign, to Mersana, effective as of the effective date of such termination, all right, title and interest in and to all Assigned Product-Specific Arising Patents and Assigned Product-Specific Arising Know-How&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(2)&#160;&#160;&#160;&#160;to the extent applicable, within &#91;**&#93; following the end of the Calendar Quarter in which this Agreement is terminated, (a) each Party shall provide the other with a report of all amounts incurred or acquired by such Party that are subject to the sharing of Development Costs in accordance with Section 11.4 (Sharing of Development Costs) or Pre-Tax Profit or Loss in accordance with Section 11.5 (Pre-Tax Profit or Loss Sharing) through the effective date of such termination for the purpose of calculating a final reconciliation of the Development Costs </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-141-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">and Pre-Tax Profit or Loss in accordance with Section&#160;11.4 (Sharing of Development Costs) and Section 11.5 (Pre-Tax Profit or Loss Sharing), as applicable&#59; and (b) the Parties shall conduct a final reconciliation of such costs and payments in accordance with Section 11.4 (Sharing of Development Costs) and Section 11.5 (Pre-Tax Profit or Loss Sharing), as applicable&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(3)&#160;&#160;&#160;&#160;within &#91;**&#93; following&#58; (a) if this Agreement is terminated by GSK pursuant to Section 16.2 (Termination by GSK for Convenience), the date of such notice of termination&#59; or (b) if this Agreement is terminated pursuant to Section 16.3 (Termination for Material Breach) or Section 16.5 (Termination for Insolvency), following the effective date of such termination, in each case ((a) or (b)), GSK shall provide Mersana with a summary report of the status and results of its (and its Affiliates&#8217;) material Development, Manufacturing and Commercialization activities directed to each Terminated Product in or for each country during the period following the last Development Report or Royalty Report delivered by GSK to Mersana hereunder&#59;</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(4)&#160;&#160;&#160;&#160;subject to Section 17.1.3(b)(6), within &#91;**&#93; following Mersana&#8217;s receipt of the summary provided by GSK pursuant to Section 17.1.3(b)(3),  Mersana shall have the right to elect, by delivery of written notice to GSK, to initiate the reversion of any Terminated Product to Mersana and, upon such request, the Parties shall negotiate in good faith and agree upon a transition plan to effect a seamless, timely reversion to Mersana of the then-ongoing Development, Manufacturing and Commercialization activities and responsibilities, as applicable, with respect to such Terminated Product(s), at &#91;**&#93; cost and expense, which transition plan will include, </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">inter alia</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#58; (a) transfer, wind-down or completion of any on-going Clinical Trials conducted by or on behalf of GSK or any of its Affiliates for such Terminated Product(s)&#59; (b) transfer and assignment (where legally permissible) of any Regulatory Filings and Regulatory Approvals Controlled by GSK or any of its Affiliates as of the effective date of such termination to the extent solely related to such Terminated Product(s)&#59; (c) transfer and assignment (where legally permissible) of material Third Party agreements to which GSK or any of its Affiliates is a party as of the effective date of such termination, to the extent solely related to the Development, Manufacturing or Commercialization of such Terminated Product(s)&#59; (d) transfer and assignment (where legally permissible) of any filings for Product Marks Controlled by GSK or any of its Affiliates as of the effective date of such termination, to the extent solely relating to such Terminated Product(s)&#59; (e) transfer and assignment (where legally permissible) of all Data Controlled by GSK or any of its Affiliates as of the effective date of such termination, to the extent solely related to such Terminated Product(s), including the timing and format thereof&#59; (g) </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-142-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Manufacturing technology transfer for the Terminated Product(s)&#59; (h) terms regarding any &#91;**&#93; transfer of existing inventory of such Terminated Product(s), if any&#59; and (i) responsibility for prosecution, maintenance, enforcement and defense of any Joint Arising Patents to the extent solely Covering such Terminated Product(s)&#59; and</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(5)&#160;&#160;&#160;&#160;subject to Section 17.1.3(b)(6), if Mersana elects to initiate the reversion pursuant to Section 17.1.3(b)(4), then&#58;</font></div><div style="margin-bottom:12pt;padding-left:198pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(1)&#160;&#160;&#160;&#160;GSK shall grant, and is hereby deemed to grant, effective as of the effective date of the applicable termination of this Agreement, to Mersana an exclusive royalty-bearing license, with the right to sublicense (through multiple tiers), under any GSK Arising Technology and Joint Arising Technology, in each case, that (i) is Controlled by GSK or any of its Affiliates as of the effective date of such termination and (ii) (1) was actually used by or on behalf of GSK or any of its Affiliates in connection with the Development or Commercialization of any Terminated Product immediately prior to the effective date of such termination or (2) is necessary or useful to Exploit any Terminated Product Controlled by GSK or any of its Affiliates as of the effective date of such termination, in each case, to make, have made, use, sell, offer for sale, import, Develop, Manufacture, Commercialize and otherwise Exploit any Licensed Products in the Field in the Territory.  On a Licensed Product-by-Licensed Product basis, Mersana shall pay to GSK (in accordance with, and Mersana shall comply with, and benefit from, the terms of Section 11.7.3 through Section&#160;11.7.9 and Section 11.9 through Section 11.14)&#59; except that all associated definitions, substituting &#8220;Mersana&#8221; for &#8220;GSK&#8221; and &#8220;GSK&#8221; for &#8220;Mersana,&#8221; and otherwise mutatis mutandis) a running royalty of (i) &#91;**&#93; percent (&#91;**&#93;%) if &#91;**&#93; as of the applicable termination of this Agreement, (ii) &#91;**&#93; percent (&#91;**&#93;%) if, as of the applicable termination of this Agreement, &#91;**&#93;, (iii) &#91;**&#93; percent (&#91;**&#93;%) if, as of the applicable termination of this Agreement, a Licensed Product &#91;**&#93;, or (iv) &#91;**&#93; percent (&#91;**&#93;%) if, as of the applicable termination of this Agreement, a Licensed Product &#91;**&#93;, in each case, on &#91;**&#93; (defined </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">mutatis mutandis</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">) of such Licensed Product by Mersana or any of its Affiliates or sublicensees, beginning on the effective date of termination of this agreement and ending, on a country-by-country basis, on the latest of (A) the expiration of the last to expire Valid Patent Claim in such country of any Mersana Patent, GSK Arising Patent or Joint Arising Patent &#91;**&#93; in such country&#59; (B) twelve (12) years following the earlier of (1) the date of First Commercial Sale of such Licensed Product in such </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-143-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:198pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">country by GSK or its Affiliates or Sublicensees or (2) the date of First Commercial Sale (defined mutatis mutandis) of such Licensed Product in such country by Mersana or its Affiliates or sublicensees&#59; or (C) the expiration of Regulatory Exclusivity for such Licensed Product in such country&#59;</font></div><div style="margin-bottom:12pt;padding-left:198pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(2)&#160;&#160;&#160;&#160;at Mersana&#8217;s request, the Parties shall negotiate in good faith a royalty-bearing, non-exclusive license under any (i) Know-How (other than any Arising Know-How) that (1) is Controlled by GSK or any of its Affiliates as of the effective date of such termination and (2) (A) was actually used by or on behalf of GSK or any of its Affiliates in connection with the Development or Commercialization of any Terminated Product immediately prior to the effective date of such termination or (B) is necessary or useful to Exploit any Terminated Product, and (ii) any Patent (other than any Arising Patents) that (1) is Controlled by GSK or its Affiliates as of the effective date of such termination and (2) Covers any of the Know-How set forth in the foregoing clause (ii) or any Terminated Product, in each case ((i) or (ii)), to make, have made, use, sell, offer for sale, import, Develop, Manufacture, Commercialize and otherwise Exploit any Licensed Products in the Field in the Territory&#59; provided that the terms of such license grant shall include commercially reasonable financial terms payable by Mersana to GSK with respect thereto, including applicable royalties.</font></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(6)&#160;&#160;&#160;&#160;Notwithstanding the foregoing, if this Agreement is terminated by GSK as a result of material safety concerns that GSK in good faith determines makes the further Development or Commercialization of one or more Licensed Product(s) unreasonable from a scientific, regulatory or ethical perspective, then the terms of Section 17.1.3(b)(4) and Section 17.1.3(b)(5) shall not apply with respect to such Licensed Product(s).  Instead, within &#91;**&#93; following Mersana&#8217;s receipt of the summary provided by GSK pursuant to Section 17.1.3(b)(3),  Mersana shall have the right to elect, by delivery of written notice to GSK, to initiate a limited reversion of the applicable Terminated Product(s) to Mersana in accordance with this Section&#160;17.1.3(b)(6), in which case, upon such request, at &#91;**&#93; cost and expense, GSK shall (a) transfer and assign to Mersana (or its designee) any Regulatory Filings and Regulatory Approvals Controlled by GSK or any of its Affiliates as of the effective date of such termination, to the extent solely related to such Terminated Product(s)&#59; (b) transfer and assign to Mersana (or its designee) all Data Controlled by GSK or any of its Affiliates as of the effective date of such termination, to the extent solely related to such Terminated Product(s)&#59; and (c) agree with Mersana on responsibility for prosecution, maintenance, enforcement and defense of any </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-144-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:162pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Joint Arising Patents to the extent solely Covering such Terminated Product(s), in each case ((a) through (c)), to the extent legally permissible.  In addition, effective as of the effective date of such termination, GSK shall &#91;**&#93; (i) any GSK Arising Technology or Joint Arising Technology, in each case, that (A) is Controlled by GSK or any of its Affiliates as of the effective date of such termination and (B) (1) was actually used by or on behalf of GSK or any of its Affiliates in connection with the Development or Commercialization of any Terminated Product immediately prior to the effective date of such termination or (2) is necessary to Exploit any Terminated Product Controlled by GSK or any of its Affiliates as of the effective date of such termination or (ii) any (A) Know-How (other than any Arising Know-How) that (1) is Controlled by GSK or any of its Affiliates as of the effective date of such termination and (2) (x) was actually used by or on behalf of GSK or any of its Affiliates in connection with the Development or Commercialization of any Terminated Product immediately prior to the effective date of such termination or (y) is necessary to Exploit any Terminated Product, and (B) any Patent (other than any Arising Patents) that (1) is Controlled by GSK or its Affiliates as of the effective date of such termination and (2) Covers any of the Know-How set forth in the foregoing clause (A), in each case ((i) or (ii)), by Developing, Manufacturing or Commercializing any Licensed Product in the Field in the Territory.  </font></div><div style="margin-bottom:12pt;padding-left:126pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(c)&#160;&#160;&#160;&#160;Except to the extent otherwise agreed by the Parties pursuant to Section&#160;17.1.3(b), following the effective date of such termination, GSK shall have the right (but not the obligation) to finish or wind-down, at &#91;**&#93; expense, any ongoing Clinical Trial(s) of any Terminated Product.  In addition, Mersana shall have the right to purchase from GSK all Terminated Products then in GSK&#8217;s inventory, as well as any in-progress inventory, at the &#91;**&#93;.  If Mersana does not elect to purchase any of such inventory, then GSK may finish, sell or otherwise dispose of all such unpurchased inventory for a period of &#91;**&#93; following the effective date of termination of this Agreement&#59; provided that GSK shall continue to pay Royalties on Net Sales of any such Terminated Product sold pursuant to this Section 17.1.3 (Termination Following Option Exercise Date) as provided in Section 11.7 (Royalties)&#59; provided that, for clarity, GSK shall have no obligation to undertake any such activities.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">17.1.4&#160;&#160;&#160;&#160;Remedies</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Except as otherwise expressly provided herein, termination of this Agreement in accordance with the provisions hereof shall not limit remedies that may otherwise be available in law or equity.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">17.2&#160;&#160;&#160;&#160;Rights in Bankruptcy</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The Parties intend to take advantage of the protections of Section 365(n) (or any successor provision) of the U.S. Bankruptcy Code or any analogous provisions in any other country or jurisdiction to the maximum extent permitted by Applicable Law.  All rights and licenses granted under or pursuant to this Agreement, but only to the extent they constitute licenses of a right to &#8220;intellectual property&#8221; as defined in Section 101 of the U.S. Bankruptcy Code, shall be deemed to be </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-145-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;intellectual property&#8221; for the purposes of Section 365(n) or any analogous provisions in any other country or jurisdiction.  The non-bankrupt Party shall retain and may fully exercise all of its rights and elections under the U.S. Bankruptcy Code or any analogous provisions in any other country or jurisdiction.  In the event of the commencement of a bankruptcy proceeding by or against a Party under the U.S. Bankruptcy Code or any analogous provisions in any other country or jurisdiction, the non-bankrupt Party shall be entitled to a complete duplicate of (or complete access to, as appropriate) all such intellectual property (including all embodiments of such intellectual property), which, if not already in the non-bankrupt Party&#8217;s possession, shall be promptly delivered to it upon its written request (a) upon commencement of a bankruptcy proceeding, unless the bankrupt Party continues to perform all of its obligations under this Agreement, or (b) if not delivered pursuant to clause (a) because the bankrupt Party continues to perform, upon the rejection of this Agreement by or on behalf of the bankrupt Party.  Unless and until the bankrupt Party rejects this Agreement, the bankrupt Party shall perform this Agreement or provide such intellectual property (including all embodiments of such intellectual property) to the non-bankrupt Party, and shall not interfere with the rights of the non-bankrupt Party to such intellectual property.  In the case of an insolvency that is governed by non-U.S. bankruptcy law, the Parties agree that, to the extent not prohibited by the applicable insolvency law, the non-bankrupt Party will be entitled to at least the same rights and protections afforded by the U.S. Bankruptcy Code, including survival of the licenses granted hereunder even if the bankrupt Party revokes or terminates this Agreement and a copy of the embodiments of such intellectual property, without conditions other than continued performance of the non-bankrupt Party&#8217;s obligations under this Agreement.  Further, each Party agrees and acknowledges that all payments by GSK to Mersana hereunder, including under Section&#160;11.4 (Sharing of Development Costs), Section 11.5 (Pre-Tax Profit or Loss Sharing), Section 11.6.1 (Development Milestones), Section 11.6.3 (Sales Milestones), and Section 11.7 (Royalties), constitute royalties within the meaning of Section 365(n) of the Bankruptcy Code and relate to licenses of intellectual property hereunder.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">17.3&#160;&#160;&#160;&#160;Accrued Rights&#59; Surviving Obligations</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Termination or expiration of this Agreement for any reason shall be without prejudice to any rights that shall have accrued to the benefit of a Party prior to such termination or expiration.  Such termination or expiration shall not relieve a Party from obligations that are expressly indicated to survive the termination or expiration of this Agreement.  </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">17.3.1&#160;&#160;&#160;&#160;Pre-Option Exercise Term</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.&#160; In addition to any other terms or conditions that are otherwise expressly stated to survive elsewhere in this Agreement, including Section 17.1 (Effects of Termination), the following provisions shall survive any termination or expiration of this Agreement that occurs at any time prior to the License Effective Date, in each case, subject to any survival periods set forth therein (as applicable)&#58; Article 1 (Definitions) (to the extent such definitions are used in other surviving provisions)&#59; Section 11.9 (Payment Terms) (solely with respect to any payment obligations that have accrued prior to the effective date of such termination)&#59; Section 11.10 (Tax Matters)&#59; Section 12.1 (Confidentiality)&#59; Section 13.1 (Ownership of Intellectual Property)&#59; Section 14.3 (Disclaimer of Warranty)&#59; Article 15 (Indemnification)&#59; Article 17 (Effects of Expiration or Termination) (but excluding Section 17.1.3 (Termination Following License Effective Date)&#59; Article 18 (Dispute Resolution)&#59; and Article 19 (Miscellaneous).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">17.3.2&#160;&#160;&#160;&#160;Following License Effective Date Exercise</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.&#160; In addition to any other terms or conditions that are otherwise expressly stated to survive elsewhere in this </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-146-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Agreement, including Section 17.1 (Effects of Termination), the following provisions shall survive any termination or expiration of this Agreement that occurs at any time following the License Effective Date, in each case, subject to any survival periods set forth therein (as applicable)&#58; Article 1 (Definitions) (to the extent such definitions are used in other surviving provisions)&#59; Section 4.1.2&#59; Section 4.4.1 (No Implied Licenses)&#59; Section 5.2.12 (Material Transfers)&#59; Section 9.4.7(a) (solely if Mersana exercises its Co-Promotion Right in accordance with Section 9.2.1 (Exercise of Co-Promotion Right))&#59; Section 11.9 (Payment Terms) (solely with respect to any payment obligations that have accrued prior to the effective date of such termination)&#59; Section 11.10 (Tax Matters)&#59; Section 11.11 (Audits)&#59; Section 11.12 (Disclaimer)&#59; Section 11.13 (Cooperation on Inter-Party Structure)&#59; Section 11.14 (Financial Disputes)&#59; Section 12.1 (Confidentiality)&#59; Section 13.1 (Ownership of Intellectual Property)&#59; Section 14.3 (Disclaimer of Warranty)&#59; Article 15 (Indemnification)&#59; Section 16.1.3 (Effect of Expiration of the Term)&#59; Article 17 (Effects of Expiration or Termination)&#59; Article 18 (Dispute Resolution)&#59; and Article 19 (Miscellaneous).&#160; </font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ARTICLE 18<br>DISPUTE RESOLUTION</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">18.1&#160;&#160;&#160;&#160;Dispute Resolution</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Except as otherwise provided pursuant to Section 2.1 (Initial Development Plan), Section 3.2 (Option Data Package), Section 10.8 (Decision-Making) or Section 11.14 (Financial Disputes), as applicable, any dispute arising out of or relating to the Agreement, or the breach, termination or validity thereof (a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Dispute</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;), shall be finally resolved pursuant to this Article 18 (Dispute Resolution).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">18.2&#160;&#160;&#160;&#160;Escalation to Senior Executives</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  In the event a Dispute arises, the Parties agree that they shall attempt in good faith to resolve the Dispute by negotiation between GSK&#8217;s &#91;**&#93; and Mersana&#8217;s &#91;**&#93; (or their respective designee(s) with power and authority to resolve such dispute) (each, a &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Senior Executive</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).  Either Party may refer a Dispute to the applicable Senior Executive of the other Party by serving notice that such Dispute has arisen and demand that negotiations commence (&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Notice of Dispute</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">18.3&#160;&#160;&#160;&#160;Mediation</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to Section 18.5 (Injunctive Relief) and Section 18.8 (Patent Disputes), if the Parties&#8217; Senior Executives are unable for any reason to resolve a Dispute by no later than &#91;**&#93; following service of the Notice of Dispute pursuant to Section 18.2 (Escalation to Senior Executives), the Parties &#91;**&#93; resolve the Dispute by referring it for confidential mediation under the CPR Mediation Procedure in effect at the start of mediation, before resorting to arbitration in accordance with Section 18.4 (Arbitration).  If the Parties cannot agree on a mediator within &#91;**&#93; following the Dispute was referred to mediation, the mediator shall, upon request by either Party, be appointed by CPR pursuant to CPR Mediation Procedure.  The cost of mediator shall be borne equally by the Parties.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">18.4&#160;&#160;&#160;&#160;Arbitration</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Subject to Section 18.5 (Injunctive Relief) and Section 18.8 (Patent Disputes), any Dispute not resolved (a) within &#91;**&#93; (or within such other time period as may be agreed to by the Parties in writing) following appointment of the mediator pursuant to Section 18.3 (Mediation)&#59; or (b) within &#91;**&#93; following service of the Notice of Dispute pursuant to Section 18.2 (Escalation to Senior Executives) (if the Parties do not mutually agree to resolve the Dispute by referring it to mediation pursuant to Section 18.3 (Mediation)), shall be finally settled by binding arbitration under the Rules of Arbitration of the American Arbitration Association (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">AAA Rules</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-147-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">18.4.1&#160;&#160;&#160;&#160;General</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Any disputes concerning the propriety of the commencement of the arbitration or the scope or applicability of this agreement to arbitrate shall be finally settled by the arbitrator(s).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">18.4.2&#160;&#160;&#160;&#160;Arbitrators</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  There shall be a single arbitrator appointed in accordance with the AAA Rules.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">18.4.3&#160;&#160;&#160;&#160;Governing Law&#59; Venue&#59; Language</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The governing law in Section 19.1 (Governing Law) shall govern such proceedings.  The place of arbitration shall be New York, New York, unless otherwise agreed to by the Parties, and the language of the arbitration shall be English.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">18.4.4&#160;&#160;&#160;&#160;Arbitration Procedure</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The arbitrator(s) shall use their best efforts to rule on the Dispute within &#91;**&#93; following appointment of the arbitrator(s).  The arbitrator(s) shall issue appropriate protective orders to safeguard each Party&#8217;s Confidential Information.  The determination of the arbitrator(s) as to the resolution of any Dispute shall be binding and conclusive upon the Parties, absent manifest error.  All rulings of the arbitrator(s) shall be in writing and shall be delivered to the Parties as soon as is reasonably possible.  Nothing contained herein shall be construed to permit the arbitrator(s) to award punitive, exemplary or any similar damages.  Any arbitration award may be entered in and enforced by a court in accordance with Section 18.4.5 (Award), Section&#160;18.5 (Injunctive Relief) and Section 18.8 (Patent Disputes), as applicable.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">18.4.5&#160;&#160;&#160;&#160;Award</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Any award to be paid by one Party to the other Party as determined by the arbitrator(s) as set forth above under Section 18.4.4 (Arbitration Procedure) shall be promptly paid in Dollars free of any tax, deduction or offset&#59; and any costs, fees or taxes incident to enforcing the award shall, to the maximum extent permitted by Applicable Law, be charged against the Party resisting enforcement.  Each Party agrees to abide by the award rendered in any arbitration conducted pursuant to this Section 18.4 (Arbitration), that the United Nations Convention on the Recognition and Enforcement of Foreign Arbitral Awards will apply to such award and that judgment may be entered upon the final award in a court of competent jurisdiction and that other courts may award full faith and credit to such judgment in order to enforce such award, subject only to revocation of the award on grounds set forth in the United Nations Convention on the Recognition and Enforcement of Foreign Arbitral Awards.</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">18.4.6&#160;&#160;&#160;&#160;Costs</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The arbitrator(s) may award to the prevailing Party, if any, as determined by the arbitrator(s), the prevailing Party&#8217;s cost, fees and expenses incurred in connection with such arbitration.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">18.5&#160;&#160;&#160;&#160;Injunctive Relief</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Nothing in this Article 18 (Dispute Resolution) will preclude either Party from seeking equitable relief or interim or provisional relief from a court of competent jurisdiction, including a temporary restraining order, preliminary injunction or other interim equitable relief, concerning a Dispute either prior to or during any arbitration if necessary to protect the interests of such Party or to preserve the </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">status quo</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> pending the arbitration proceeding.  For the avoidance of doubt, nothing in this Section 18.5 (Injunctive Relief) shall otherwise limit a breaching Party&#8217;s opportunity to cure a material breach as permitted in accordance with Section 16.3 (Termination for Material Breach).</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-148-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">18.6&#160;&#160;&#160;&#160;Confidentiality</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  All dispute resolution proceedings undertaken by the Parties pursuant to this Article 18 (Dispute Resolution), including any mediation pursuant to Section 18.3 (Mediation) or arbitration proceeding pursuant to Section 18.4 (Arbitration), or pursuant to Section 3.2 (Option Data Package), Section 10.8 (Decision-Making) or Section 11.14 (Financial Disputes), as applicable, shall be confidential, and the Parties&#8217; shall take appropriate measures to safeguard each Party&#8217;s Confidential Information.  Except as required by Applicable Law, no Party shall make (or instruct any Third Party, including any mediator or arbitrator(s), to make) any public announcement with respect to the dispute resolution proceedings or any final resolution of any Dispute hereunder, including any decision of a mediator pursuant to Section 18.3 (Mediation) or an arbitrator pursuant to Section 18.4 (Arbitration), in each case, without prior written consent of the other Party.  The existence of any Dispute under this Article&#160;18 (Dispute Resolution), Section 3.2 (Option Data Package), Section 10.8 (Decision-Making) or Section 11.14 (Financial Disputes), as applicable, and any final resolution, decision or award reached or granted pursuant thereto, shall be kept in confidence by the Parties and any mediator or arbitrator(s), as applicable, except as required in connection with the enforcement of such final resolution, decision or award or as otherwise required by Applicable Law.  Notwithstanding the foregoing, each Party shall have the right to disclose information regarding any dispute resolution proceedings undertaken pursuant to this Article 18 (Dispute Resolution), Section 3.2 (Option Data Package), Section 10.8 (Decision-Making) or Section 11.14 (Financial Disputes), in each case, solely to the same extent as it may disclose Confidential Information of the other Party in accordance with Section 12.1 (Confidentiality).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">18.7&#160;&#160;&#160;&#160;Survivability</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The terms of this Article 18 (Dispute Resolution), including the duty to arbitrate pursuant to Section 18.4 (Arbitration), shall remain in effect and be enforceable after termination of this Agreement for any reason.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">18.8&#160;&#160;&#160;&#160;Patent Disputes</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Notwithstanding Section 18.3 (Mediation) or Section 18.4 (Arbitration), any Dispute to the extent regarding the inventorship, validity, scope or enforceability of intellectual property rights shall be submitted to a court of competent jurisdiction or patent office in the country in which such intellectual property rights were granted or arose, or to an applicable multi-jurisdictional patent tribunal.</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">ARTICLE 19<br>MISCELLANEOUS</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.1&#160;&#160;&#160;&#160;Governing Law</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  This Agreement and any dispute arising from the performance or breach hereof shall be governed by and construed in accordance with the laws of the State of New York, without reference to conflicts of laws principles (other than New York General Obligations Law &#167; 5-1401 and &#167; 5-1402).  The Parties acknowledge that this Agreement evidences a transaction involving interstate commerce and a foreign (non-U.S.) Party.  Notwithstanding the provision in the preceding sentence with respect to the applicable substantive law, any arbitration, decision or award rendered hereunder and the validity, effect and interpretation of the arbitration provision shall be governed by the Federal Arbitration Act.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.2&#160;&#160;&#160;&#160;Assignment</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Neither Party may assign this Agreement, nor the licenses granted hereunder, in whole or in part to any Third Party without the prior written consent of the other Party hereto.  Notwithstanding the foregoing, either Party may assign its rights and delegate its obligations under this Agreement, in whole or in part, without the consent of the other Party, to (a) an Affiliate or (b) to a Third Party that acquires all or substantially all of the business or assets of such Party to which the subject matter of this Agreement </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-149-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">pertains (whether by merger, reorganization, acquisition, sale of assets or otherwise).  The assigning Party remains fully liable for the performance of its obligations hereunder by any such assignee.  In addition, and notwithstanding the foregoing, Mersana may assign its right to receive payments under this Agreement as part of a royalty factoring transaction undertaken for bona fide financing purposes.  Any assignment of this Agreement in violation of this Section 19.2 (Assignment) will be null, void, and of no legal effect.  This Agreement will be binding on and will inure to the benefit of the permitted successors and assigns of the Parties.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.3&#160;&#160;&#160;&#160;Change of Control</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If, at any time during the Term, Mersana undergoes a Change of Control with a New Affiliate that is, as of the time of such Change of Control, &#91;**&#93;, then&#58;  </font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.3.1&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">promptly following the consummation of the transactions contemplated under the applicable Change of Control, Mersana shall deliver written notice to GSK with respect thereto, which notice shall disclose the identity of such New Affiliate, and GSK may require that Mersana ensure that firewalls and other protections reasonably acceptable to GSK are implemented to prevent the disclosure to, or use by, such New Affiliate of any GSK Technology or any Confidential Information of GSK, including the Commercialization Framework or any updates thereto&#59;</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.3.2&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">if such Change of Control occurs either during the Pre-Option Exercise Period or during the Development Term and such New Affiliate is a Potentially Competing Acquiror &#91;**&#93;, then, notwithstanding anything to the contrary set forth in this Agreement, including Section 5.2.2(b), GSK shall have the right to elect, by delivery of written notice to Mersana (which notice must be provided within &#91;**&#93; after Mersana notifies GSK of such Change of Control pursuant to Section 19.3.1), to allocate responsibility to GSK for the conduct of all Shared Global Development Activities under the Joint Development Plan&#59; provided that Mersana or its applicable Affiliate(s) may finish conducting any ongoing Shared Global Development Activities that have already been allocated to Mersana or any of its Affiliates under the then-current Joint Development Plan as of the time of such Change of Control, as applicable, in each case, subject to and in accordance with the terms of this Agreement&#59;</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.3.3&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">if such Change of Control occurs at any point during the Term prior to Mersana&#8217;s exercise of the Co-Promotion Right pursuant to Section 9.2.1 (Exercise of Co-Promotion Right) and such New Affiliate &#91;**&#93; and &#91;**&#93;, then, notwithstanding anything to the contrary set forth in this Agreement, including Section 9.2 (Co-Promotion Right), GSK shall have the right to elect, by delivery of written notice to Mersana (which notice must be provided no earlier than &#91;**&#93; prior to the date on which the Parties would have been required to establish the CAC pursuant to Section 8.3.1 (Establishment of CAC) or, if the CAC has already been established, no later than &#91;**&#93; after Mersana notifies GSK of such Change of Control pursuant to Section 19.3.1), to prohibit Mersana from exercising the Co-Promotion Right, in which case, following such election by GSK pursuant to this Section 19.3.3, the Parties&#8217; respective rights and obligations under Section 9.2 (Co-Promotion Right) shall automatically expire&#59; and</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify;text-indent:-54pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.3.4&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">if such Change of Control occurs at any point during the Term following Mersana&#8217;s exercise of the Co-Promotion Right pursuant to Section 9.2.1 </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-150-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">(Exercise of Co-Promotion Right) and such New Affiliate &#91;**&#93;, then GSK shall have the right to deliver a notice of termination pursuant to Section 9.3.1(b)) (which notice of termination must be provided within &#91;**&#93; after Mersana notifies GSK of such Change of Control pursuant to Section 19.3.1) to terminate the Co-Promotion Right pursuant to Section 9.3.2(b), in which case, the terms of Section 9.3.4 (Effects of Termination of Co-Promotion Right) shall apply.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">For purposes of this Section 19.3 (Change of Control), &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">&#91;**&#93;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; means &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">For the avoidance of doubt, without limiting Mersana&#8217;s obligations under Section 19.3.1, this Section 19.3 (Change of Control) shall not affect any of the Parties&#8217; rights or obligations that are not specifically addressed in this Section 19.3 (Change of Control), including the Parties&#8217; respective rights and obligations with respect to (a) the Committees and updating the Joint Development Plan and Joint Development Budget&#59; (b) GSK&#8217;s obligations to deliver any additional reporting or information pursuant to Section 5.2 (Shared Global Development Activities), Section 5.3.2 (Independent Registration Studies), Section 5.5 (GSK Development Activities), Article 6 (Regulatory Matters), Section 8.3 (Commercialization Advisory Committee), Article 9 (Profit Share Election&#59; Co-Promotion Right), Section 10.4.2 (Responsibilities of the JCC), Section 11.6.4(b) or Section 11.7.8 (Royalty Reporting)&#59; (c) the Parties&#8217; rights and obligations with respect to the sharing of Development Costs pursuant to Section 11.4 (Sharing of Development Costs)&#59; or (d) if Mersana exercises its Profit Share Election pursuant to Section 9.1.1 (Exercise of Profit Share Election), the Parties&#8217; rights and obligations with respect to the Profit Share Election or the sharing of Pre-Tax Profit or Loss, in each case ((a) &#8211; (d)), except to the extent that any such rights or obligations are explicitly modified pursuant to this Section 19.3 (Change of Control), as applicable.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.4&#160;&#160;&#160;&#160;Force Majeure</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Both Parties shall be excused from the performance of their obligations under this Agreement to the extent that such performance is prevented by a Force Majeure and the nonperforming Party promptly provides notice to the other Party.  Such excuse shall be continued so long as the condition constituting Force Majeure continues and the non-performing Party takes Commercially Reasonable Efforts to remove the condition, for up to a maximum of &#91;**&#93;, after which time the Parties will negotiate in good faith any modifications of the terms and conditions of this Agreement that may be necessary to arrive at an equitable solution.  To the extent possible, each Party shall use Commercially Reasonable Efforts to minimize the duration of any Force Majeure.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.5&#160;&#160;&#160;&#160;Notices</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Any notice required or permitted to be given by either Party under this Agreement shall be in writing and shall be personally delivered or sent by a nationally recognized private express courier, or by first class mail (registered or certified) to the respective Parties as set forth below.  Notices will be deemed effective (a) the next day if sent by courier&#59; or (b) five (5) Business Days after deposit, postage prepaid, if mailed.  Either Party may change its address for purposes hereof by written notice to the other in accordance with the provisions of this Section 19.5 (Notices).</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">If to GSK&#58;</font></div><div style="padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">GlaxoSmithKline</font></div><div style="padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">259 E Grand Ave Fifth Floor, Suite 1</font></div><div style="padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">San Francisco, CA 94080</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Attn&#58; SVP &#38; Head R&#38;D Business Development</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-151-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">With a copy (which shall not constitute notice to)&#58;</font></div><div style="padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">GlaxoSmithKline</font></div><div style="padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">980 Great West Road</font></div><div style="padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Brentford, Middlesex TW8 9GS</font></div><div style="padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">United Kingdom</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Attn.&#58; VP &#38; Head of Legal Business Development &#38; Corporate</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">If to Mersana&#58;</font></div><div style="padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Mersana Therapeutics, Inc.</font></div><div style="padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">840 Memorial Drive</font></div><div style="padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Cambridge, MA 02139</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Attn.&#58; Chief Executive Officer</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">With a copy (which shall not constitute notice to)&#58;</font></div><div style="padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Mersana Therapeutics, Inc.</font></div><div style="padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">840 Memorial Drive</font></div><div style="padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Cambridge, MA 02139</font></div><div style="margin-bottom:12pt;padding-left:90pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Attn.&#58; Chief Legal Officer</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.6&#160;&#160;&#160;&#160;Export Clause</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Each Party acknowledges that the Applicable Laws of the United States and other Applicable Laws restrict the export and re-export of certain commodities and technical data.  Each Party agrees that it will not export or re-export restricted commodities or technical data of the other Party in any form without the necessary United States or foreign government licenses.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.7&#160;&#160;&#160;&#160;Waiver</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The terms and conditions of this Agreement may be waived or released only by a written instrument executed by the Party or Parties waiving or releasing compliance.  The failure of either Party to assert a right hereunder or to insist upon compliance with any term or condition of this Agreement shall not constitute a waiver of that right or excuse a similar subsequent failure to perform any such term or condition.  No waiver by either Party of any condition or term in any one or more instances shall be construed as a continuing waiver or subsequent waiver of such condition or term or of another condition or term.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.8&#160;&#160;&#160;&#160;Severability</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  If any provision hereof should be held invalid, illegal or unenforceable in any jurisdiction, then the Parties shall negotiate in good faith a valid, legal and enforceable substitute provision that most nearly reflects the original intent of the Parties and all other provisions hereof shall remain in full force and effect in such jurisdiction and shall be liberally construed in order to carry out the intentions of the Parties hereto as nearly as may be possible.  Such invalidity, illegality or unenforceability shall not affect the validity, legality or enforceability of any other provision of this Agreement or of such provision in any other jurisdiction, unless the invalid, illegal or unenforceable provisions are of such essential importance to this Agreement that it is to be reasonably assumed that the Parties would not have entered into this Agreement without such invalid provisions.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.9&#160;&#160;&#160;&#160;Performance by Affiliates</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Either Party may exercise its rights and perform its obligations under this Agreement directly or through one or more of its Affiliates.  Each Party&#8217;s Affiliates will have the benefit of all rights (including all licenses) of such Party under this Agreement.  Each Party will remain responsible hereunder for the acts and </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-152-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">omissions of its respective Affiliates in accordance with the applicable terms of this Agreement.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.10&#160;&#160;&#160;&#160;Entire Agreement</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  This Agreement, together with the Schedules attached hereto, constitutes the entire agreement between the Parties with respect to the subject matter hereof and thereof.  There are no restrictions, promises, warranties or undertakings, other than those set forth or referred to herein or therein.  This Agreement supersedes all prior or contemporaneous agreements and understandings between the Parties with respect to the subject matter hereof, including, solely to the extent relating to the subject matter of this Agreement, the Existing Confidentiality Agreement, and all information exchanged between the Parties under the Existing Confidentiality Agreement that relates to the subject matter of this Agreement shall be considered Confidential Information exchanged hereunder upon the Effective Date.  No subsequent alteration, amendment, change or addition to this Agreement shall be binding upon the Parties hereto unless reduced to writing and signed by the respective authorized officers of both Parties.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.11&#160;&#160;&#160;&#160;Cumulative Remedies</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  No remedy referred to in this Agreement is intended to be exclusive, but each will be cumulative and in addition to any other remedy referred to in this Agreement or otherwise available under Applicable Law.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.12&#160;&#160;&#160;&#160;Independent Contractors</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Nothing herein shall be construed to create a partnership, or any relationship of employer and employee, agent and principal, or joint venture between the Parties.  Each Party is an independent contractor.  Neither Party shall assume, either directly or indirectly, any liability of or for the other Party.  Neither Party shall have the authority to bind or obligate the other Party, and neither Party shall represent that it has such authority.  Neither Party shall report the transactions and undertakings contemplated by this Agreement as a partnership for United States federal income tax purposes unless the arrangement between the Parties as contemplated by this Agreement is determined to constitute an Entity under Applicable Law (as determined based on the opinion (on a &#8220;should&#8221; basis) of a nationally recognized law or accounting firm) or by a Tax Authority on audit or other examination.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.13&#160;&#160;&#160;&#160;Headings</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Headings used herein are for convenience only and shall not in any way affect the construction of or be taken into consideration in interpreting this Agreement.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.14&#160;&#160;&#160;&#160;Further Actions</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Each Party shall execute, acknowledge and deliver such further instruments, and do all such other acts, as may be reasonably necessary or appropriate in order to carry out the expressly stated purposes and the clear intent of this Agreement.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.15&#160;&#160;&#160;&#160;Supremacy</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  To the extent of any express conflict or inconsistency between this Agreement and any Schedule hereto, except as otherwise expressly provided, the terms and conditions of this Agreement shall control.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.16&#160;&#160;&#160;&#160;Counterparts</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  This Agreement may be executed and delivered (including by PDF or any other electronically transmitted signatures) in counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.17&#160;&#160;&#160;&#160;Binding Effect&#59; No Third Party Beneficiaries</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  As of the Effective Date, this Agreement will be binding upon and inure to the benefit of the Parties and their respective permitted successors and assigns.  This Agreement is intended for the benefit of the Parties, their respective permitted successors and assigns, and is not for the benefit of, nor may any provision hereof be enforced by, any other Person other than with respect </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-153-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">to the indemnification provisions in Article 15 (Indemnification) and as otherwise expressly set forth herein.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">19.18&#160;&#160;&#160;&#160;Interpretation</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  The definitions of the terms herein will apply equally to the singular and plural forms of the terms defined.  Whenever the context may require, any pronoun will include the corresponding masculine, feminine, and neuter forms.  The word &#8220;any&#8221; will mean &#8220;any and all&#8221; unless otherwise clearly indicated by context.  Unless the context requires otherwise, (a) any definition of or reference to any agreement, instrument, or other document herein will be construed as referring to such agreement, instrument, or other document as from time to time amended, supplemented, or otherwise modified (subject to any restrictions on such amendments, supplements or modifications set forth herein or therein), (b) any reference to any Applicable Laws herein will be construed as referring to such Applicable Laws as from time to time enacted, repealed, or amended, (c) any reference herein to any Person will be construed to mean the Person&#8217;s successors and assigns (after any such succession or assignment), (d) the words &#8220;herein&#8221;, &#8220;hereof&#8221; and &#8220;hereunder&#8221;, and words of similar import, will be construed to refer to this Agreement in its entirety and not to any particular provision hereof, (e) the word &#8220;or&#8221; will be interpreted to mean &#8220;and&#47;or&#8221;, (f) all references herein to Articles, Sections, or Exhibits, unless otherwise specifically provided, will be construed to refer to Articles, Sections, and Exhibits of this Agreement, (g) the words &#8220;include,&#8221; &#8220;includes&#8221; and &#8220;including&#8221; will be interpreted to mean &#8220;include without limitation,&#8221; &#8220;includes without limitation&#8221; and &#8220;including without limitation,&#8221; respectively, (h) wherever used, the word &#8220;shall&#8221; and the word &#8220;will&#8221; are each understood to be imperative or mandatory in nature and are interchangeable with one another, (i) the word &#8220;notice&#8221; means notice in writing (whether or not specifically stated) and will include notices, consents, approvals and other written communications contemplated under this Agreement, and (j) provisions that require that a Party, the Parties or any committee hereunder &#8220;agree,&#8221; &#8220;consent,&#8221; or &#8220;approve&#8221; or the like will require that such agreement, consent or approval be specific and in writing, whether by written agreement, letter, approved minutes, or otherwise (but excluding email and instant messaging).</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">&#91;Signature page follows&#93;</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-154-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><div id="ice64557759424b7bba925a7a74526e92_10"></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div style="text-align:right"><font><br></font></div></div><div style="margin-bottom:12pt;text-align:justify;text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">IN WITNESS WHEREOF, the Parties have caused this Agreement to be executed as of the Effective Date by their respective duly authorized representatives as set forth below.</font></div><div style="margin-bottom:24pt;padding-left:234pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">GLAXOSMITHKLINE INTELLECTUAL PROPERTY (NO. 4) LIMITED</font></div><div style="margin-bottom:12pt;padding-left:234pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">By&#58;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">&#47;s&#47; Marcus Dowding</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;</font></div><div style="margin-bottom:30pt;padding-left:234pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Its&#58; </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Authorised Signatory</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;</font></div><div style="margin-bottom:24pt;padding-left:234pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">MERSANA THERAPEUTICS, INC.</font></div><div style="margin-bottom:12pt;padding-left:234pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">By&#58;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">&#47;s&#47; Anna Protopapas</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;</font></div><div style="margin-bottom:12pt;padding-left:234pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Its&#58; </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">President and CEO</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;</font></div><div style="margin-bottom:12pt"><font><br></font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:400;line-height:100%">Signature Page to Collaboration, Option and License Agreement</font></div><div><font><br></font></div><div><font><br></font></div></div></div><div id="ice64557759424b7bba925a7a74526e92_13"></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div style="text-align:right"><font><br></font></div></div><div><font><br></font></div><div><font><br></font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">SCHEDULE 11.5.1<br>PRE-TAX PROFIT OR LOSS SCHEDULE</font></div><div style="margin-bottom:12pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">A.&#160;&#160;&#160;&#160;General Principles</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Pre-Tax Profit or Loss for the Shared Territory shall be calculated in accordance with this </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 11.5.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> and shall exclude &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#91;**&#93;.</font></div><div style="margin-bottom:12pt;text-align:justify;text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:700;line-height:100%">Principles for Calculation of Pre-Tax Profit or Loss</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">1.&#160;&#160;&#160;&#160;Pre-Tax Profit or Loss shall be calculated for each Calendar Quarter by determining the Net Sales of the applicable Licensed Product in the Shared Territory, &#91;**&#93; and subtracting Allowable Expenses directly attributable and &#91;**&#93; allocated to such Licensed Product incurred during such Calendar Quarter (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Pre-Tax Profit or Loss</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221;).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">2.&#160;&#160;&#160;&#160;No cost item shall be allocated to more than one cost category.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">3.&#160;&#160;&#160;&#160;Costs incurred by a Party in connection with Commercialization of Licensed Products in the Profit Share Territory shall be allocated to the appropriate category of Allowable Expenses in accordance with &#91;**&#93; and the Shared Territory Commercialization Budget.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">4.&#160;&#160;&#160;&#160;All undefined terms shall be construed in accordance with Accounting Standards, but only to the extent consistent with their usage and the other definitions in this </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 11.5.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> and the Agreement.  &#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">5.&#160;&#160;&#160;&#160;&#91;**&#93;.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">6.&#160;&#160;&#160;&#160;The Parties shall comply, and shall assist each other in complying, with any reporting requirements under Applicable Law (including securities law) with respect to Pre-Tax Profit or Loss.  For the avoidance of doubt, except for the type of non-income taxes described in clause (e) of the definition of &#8220;Net Sales,&#8221; taxes will not be treated as an item of expense to be deducted against Net Sales for purposes of determining the Pre-Tax Profit or Loss.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">7.&#160;&#160;&#160;&#160;Nothing in this </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 11.5.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%"> will apply to any Licensed Product for which the Parties are not sharing Pre-Tax Profit or Loss pursuant to the terms of the Agreement.</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">B.&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Reporting, Reconciliation and Payment Procedures</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">.  Reporting, reconciliation and payment procedures with respect to Pre-Tax Profit or Loss are set forth in Section 11.5 (Pre-Tax Profit or Loss Sharing).</font></div><div style="margin-bottom:12pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">C.&#160;&#160;&#160;&#160;Financial Definitions</font></div><div style="margin-bottom:12pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">The following definitions, along with capitalized terms that are defined elsewhere in the Agreement, shall apply for the purposes of calculating Pre-Tax Profit or Loss.  If a financial term is not defined in this </font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%;text-decoration:underline">Schedule 11.5.1</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">, or elsewhere in the Agreement, then such term shall, on a Licensed Product-by-Licensed Product basis, be defined by mutual agreement of the Financial Working Group.  Additionally, in no event shall a particular cost or expense (i) be counted more than once as part of calculating Allowable Expenses, even if falling under more than one </font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="margin-bottom:12pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">category of Allowable Expense hereunder or (ii) be counted separately as an Allowable Expense if otherwise already accounted for as part of determining Net Sales, Allowable Expenses or Development Costs.</font></div><div style="margin-bottom:12pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8220;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:700;line-height:100%">Allowable Expenses</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#8221; 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percent (&#91;**&#93;%) of Net Sales of Licensed Products (except as modified by Sections &#91;**&#93; and &#91;**&#93; of the Mersana &#91;**&#93; Agreement).</font></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><font style="color:#000000;font-family:'Calibri',sans-serif;font-size:11pt;font-weight:400;line-height:100%">4.&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">Where any Third Party other than &#91;**&#93;, Mersana, any of Mersana&#8217;s Affiliates, or GSK &#91;**&#93;, (a) a payment of &#91;**&#93; per sublicence (including any such sublicense to a Third Party pursuant to this Agreement) due &#91;**&#93; during the course of such sublicence (irrespective as to the years of &#91;**&#93;), and being first payable on the commencement date of the relevant sublicence and (b) a royalty of &#91;**&#93; percent (&#91;**&#93;%) of Net Sales of Licensed Products (except as modified by Sections &#91;**&#93; and &#91;**&#93; of the Mersana &#91;**&#93; Agreement).</font></div><div style="height:77.76pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:12pt;font-weight:400;line-height:100%">&#160;&#160;&#160;&#160;-7-</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:43.108%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="background-color:#ffffff;padding:0 1pt"><div><font><br></font></div></td></tr></table></div><div><font><br></font></div></div></div></body></html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.1
<SEQUENCE>3
<FILENAME>exhibit31110-qfy2022q3.htm
<DESCRIPTION>EX-31.1
<TEXT>
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<!-- Document created using Wdesk -->
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<title>Document</title></head><body><div id="i05d83c317f2a44219f82afc78533b987_1"></div><div style="min-height:72pt;width:100%"><div style="text-align:right"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Exhibit 31.1</font></div></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Certification of Principal Executive Officer pursuant to Exchange Act Rules 13a-14(a</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">) &#160;</font></div><div style="margin-bottom:6pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">and 15d-14(a), as adopted pursuant to Section&#160;302 of Sarbanes-Oxley Act of 2002</font></div><div style="margin-bottom:6pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">I, Anna Protopapas, certify that&#58; &#160;</font></div><div style="margin-bottom:6pt;padding-left:18pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">1.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:10.5pt">I have reviewed this Quarterly Report on Form 10-Q of Mersana Therapeutics, Inc.&#59;</font></div><div style="margin-bottom:6pt;padding-left:18pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">2.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:10.5pt">Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report&#59;</font></div><div style="margin-bottom:6pt;padding-left:18pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">3.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:10.5pt">Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report&#59;</font></div><div style="margin-bottom:6pt;padding-left:18pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">4.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:10.5pt">The registrant&#8217;s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have&#58;</font></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">a)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:10.24pt">Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared&#59;</font></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">b)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:9.67pt">Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles&#59;</font></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">c)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:10.24pt">Evaluated the effectiveness of the registrant&#8217;s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation&#59; and</font></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">d)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:9.67pt">Disclosed in this report any change in the registrant&#8217;s internal control over financial reporting that occurred during the registrant&#8217;s most recent fiscal quarter (the registrant&#8217;s fourth fiscal quarter in the case of an annual report), that has materially affected, or is reasonably likely to materially affect, the registrant&#8217;s internal control over financial reporting&#59; and</font></div><div style="margin-bottom:6pt;padding-left:18pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">5.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:10.5pt">The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions)&#58;</font></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">a)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:10.24pt">All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information&#59; and</font></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">b)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:9.67pt">Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting</font></div><div style="margin-bottom:6pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:98.076%"><tr><td style="width:1.0%"></td><td style="width:52.331%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:5.599%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:1.924%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:36.646%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Mersana Therapeutics, Inc.</font></td></tr><tr style="height:15pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Dated&#58;&#160;November&#160;7, 2022</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">By&#58;</font></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#47;s&#47; Anna Protopapas</font></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Anna Protopapas</font></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">President and Chief Executive Officer<br>(Principal Executive Officer)</font></td></tr></table></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font><br></font></div></div></div></body></html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.2
<SEQUENCE>4
<FILENAME>exhibit31210-qfy2022q3.htm
<DESCRIPTION>EX-31.2
<TEXT>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head>
<!-- Document created using Wdesk -->
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<title>Document</title></head><body><div id="ic4f32c2ba3db49b0aac61a1003f63218_1"></div><div style="min-height:72pt;width:100%"><div style="text-align:right"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Exhibit 31.2</font></div></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Certification of Principal Financial Officer pursuant to Exchange Act Rules 13a-14(a)</font></div><div style="margin-bottom:6pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">and 15d-14(a), as adopted pursuant to Section&#160;302 of Sarbanes-Oxley Act of 2002</font></div><div style="margin-bottom:6pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">I, Brian DeSchuytner, certify that&#58;</font></div><div style="margin-bottom:6pt;padding-left:18pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">1.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:10.5pt">I have reviewed this Quarterly Report on Form 10-Q of Mersana Therapeutics, Inc.&#59;</font></div><div style="margin-bottom:6pt;padding-left:18pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">2.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:10.5pt">Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report&#59;</font></div><div style="margin-bottom:6pt;padding-left:18pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">3.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:10.5pt">Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report&#59;</font></div><div style="margin-bottom:6pt;padding-left:18pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">4.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:10.5pt">The registrant&#8217;s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have&#58;</font></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">a)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:10.24pt">Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared&#59;&#160;</font></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">b)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:9.67pt">Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles&#59;</font></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">c)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:10.24pt">Evaluated the effectiveness of the registrant&#8217;s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation&#59; and</font></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">d)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:9.67pt">Disclosed in this report any change in the registrant&#8217;s internal control over financial reporting that occurred during the registrant&#8217;s most recent fiscal quarter (the registrant&#8217;s fourth fiscal quarter in the case of an annual report), that has materially affected, or is reasonably likely to materially affect, the registrant&#8217;s internal control over financial reporting&#59; and</font></div><div style="margin-bottom:6pt;padding-left:18pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">5.</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:10.5pt">The registrant&#8217;s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant&#8217;s auditors and the audit committee of the registrant&#8217;s board of directors (or persons performing the equivalent functions)&#58;</font></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">a)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:10.24pt">All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant&#8217;s ability to record, process, summarize and report financial information&#59; and</font></div><div style="margin-bottom:6pt;padding-left:36pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">b)</font><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:9.67pt">Any fraud, whether or not material, that involves management or other employees who have a significant role in the 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<title>Document</title></head><body><div id="i72f09ffce7744d5d958ef506ecce2b40_1"></div><div style="min-height:72pt;width:100%"><div style="text-align:right"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Exhibit 32.1</font></div></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT</font></div><div style="margin-bottom:12pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002</font></div><div style="margin-bottom:6pt"><font style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In connection with the Quarterly Report on Form 10-Q of Mersana Therapeutics, Inc. 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<TYPE>EX-101.LAB
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<FILENAME>mrsn-20220930_lab.xml
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    <link:label id="lab_dei_EntityAddressPostalZipCode_e8c27159-c5ab-4909-951d-8dc63961eeb6_terseLabel_en-US" xlink:label="lab_dei_EntityAddressPostalZipCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
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    <link:label id="lab_us-gaap_RestrictedCashNoncurrent_4463a598-96b3-4fbf-ad4c-dea7f3348b17_periodStartLabel_en-US" xlink:label="lab_us-gaap_RestrictedCashNoncurrent" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restricted cash, beginning of period</link:label>
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    <link:label id="lab_mrsn_AccruedPreclinicalExpensesCurrent_7c6a5850-9eaa-467a-8cc5-f18dab718385_terseLabel_en-US" xlink:label="lab_mrsn_AccruedPreclinicalExpensesCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued research and non-clinical expenses</link:label>
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    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_d84e7910-dae5-43c1-b592-c10993c56e9a_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted-average number of shares of common stock used in net loss per share attributable to common stockholders &#8212; diluted (in shares)</link:label>
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    <link:label id="lab_us-gaap_PreferredStockSharesOutstanding_0d5be926-f8b7-46e3-a078-4c4cba93203b_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred stock, shares outstanding (in shares)</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentAxis_c30eae04-ebfe-4b6c-b33f-3d33755b7427_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Instrument [Axis]</link:label>
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    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_8b8b35d0-7fbb-4873-82a7-04be6c68bcca_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Maximum borrowing capacity</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_a03418f9-5b77-4c36-b366-c2dcac587ca3_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Securities, Available-for-sale [Line Items]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Securities, Available-for-Sale [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
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    <link:label id="lab_mrsn_DebtPrincipalAdvances_91294ad1-665f-45f6-9f8f-0895e5dc1e6a_terseLabel_en-US" xlink:label="lab_mrsn_DebtPrincipalAdvances" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Principal advances</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_DebtPrincipalAdvances" xlink:to="lab_mrsn_DebtPrincipalAdvances" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockValue_d285158c-1db7-4149-8ba9-fd6ddccc131c_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common stock, $0.0001 par value; 350,000,000 and 175,000,000 shares authorized at September&#160;30, 2022 and December&#160;31, 2021, respectively ; 98,582,583 and 73,709,056&#160;shares issued and outstanding at September&#160;30, 2022 and December&#160;31, 2021, respectively</link:label>
    <link:label id="lab_us-gaap_CommonStockValue_label_en-US" xlink:label="lab_us-gaap_CommonStockValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common Stock, Value, Issued</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentNameDomain_a005a309-df20-46b7-82b7-80f0ad1cdb7f_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Instrument, Name [Domain]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentNameDomain_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Instrument, Name [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/>
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    <link:label id="lab_us-gaap_ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod_da655c31-0800-415b-8127-69c15636fc8a_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Performance obligations satisfied in previous periods</link:label>
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    <link:label id="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_label_en-US" xlink:label="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Instruments [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
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    <link:label id="lab_mrsn_A2017ESPPMember_743b04bc-097d-4191-882b-d3f9960a9379_terseLabel_en-US" xlink:label="lab_mrsn_A2017ESPPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2017 ESPP</link:label>
    <link:label id="lab_mrsn_A2017ESPPMember_label_en-US" xlink:label="lab_mrsn_A2017ESPPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2017 ESPP [Member]</link:label>
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    <link:label id="lab_srt_RangeMember_1a44e66e-a514-48e6-9502-5e25de81c78f_terseLabel_en-US" xlink:label="lab_srt_RangeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Range [Domain]</link:label>
    <link:label id="lab_srt_RangeMember_label_en-US" xlink:label="lab_srt_RangeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statistical Measurement [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
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    <link:label id="lab_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_2b2cd471-fdca-4186-ac8d-389143d865ba_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Outstanding Potentially Dilutive Securities</link:label>
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    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_3415e7e0-6389-4bec-a8cc-198523b3486c_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise of stock options (in shares)</link:label>
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    <link:label id="lab_mrsn_CollaborationArrangementsMilestonePaymentReceivableNextMilestone_628704de-c40d-43e8-b51d-e74fd0a26bd1_terseLabel_en-US" xlink:label="lab_mrsn_CollaborationArrangementsMilestonePaymentReceivableNextMilestone" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Next potential milestone payment eligible to receive</link:label>
    <link:label id="lab_mrsn_CollaborationArrangementsMilestonePaymentReceivableNextMilestone_label_en-US" xlink:label="lab_mrsn_CollaborationArrangementsMilestonePaymentReceivableNextMilestone" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Collaboration Arrangements, Milestone Payment Receivable, Next Milestone</link:label>
    <link:label id="lab_mrsn_CollaborationArrangementsMilestonePaymentReceivableNextMilestone_documentation_en-US" xlink:label="lab_mrsn_CollaborationArrangementsMilestonePaymentReceivableNextMilestone" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount of the next potential milestone the company will be eligible to receive.</link:label>
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    <link:label id="lab_mrsn_EarlyClinicalDevelopmentMember_label_en-US" xlink:label="lab_mrsn_EarlyClinicalDevelopmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Early Clinical Development [Member]</link:label>
    <link:label id="lab_mrsn_EarlyClinicalDevelopmentMember_documentation_en-US" xlink:label="lab_mrsn_EarlyClinicalDevelopmentMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Early Clinical Development</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_EarlyClinicalDevelopmentMember" xlink:to="lab_mrsn_EarlyClinicalDevelopmentMember" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_PreferredStockSharesAuthorized_febeca18-7ce6-4328-8f2f-a69523c2cfb0_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockSharesAuthorized" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred stock, shares authorized (in shares)</link:label>
    <link:label id="lab_us-gaap_PreferredStockSharesAuthorized_label_en-US" xlink:label="lab_us-gaap_PreferredStockSharesAuthorized" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred Stock, Shares Authorized</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PreferredStockSharesAuthorized"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockSharesAuthorized" xlink:to="lab_us-gaap_PreferredStockSharesAuthorized" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalCommonStock_c0997646-6dc2-4968-afa6-8b547035af91_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalCommonStock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additional paid-in capital</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdditionalPaidInCapitalCommonStock" xlink:to="lab_us-gaap_AdditionalPaidInCapitalCommonStock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_21f1c179-5d6c-4a4c-b209-5f9fd396e19a_periodStartLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash, cash equivalents and restricted cash, beginning of period</link:label>
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    <link:label id="lab_us-gaap_OtherNoncashIncomeExpense_b55c48bd-8530-4eb6-a984-6f460c720f59_negatedLabel_en-US" xlink:label="lab_us-gaap_OtherNoncashIncomeExpense" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other non-cash items</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherNoncashIncomeExpense" xlink:to="lab_us-gaap_OtherNoncashIncomeExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_599a1132-39ea-470a-b7ad-900320c550fc_verboseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property and equipment, net</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization</link:label>
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    <link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_27ac87a5-148b-404b-b835-a89be3ce42a6_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current liabilities:</link:label>
    <link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities, Current [Abstract]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:to="lab_us-gaap_LiabilitiesCurrentAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromStockOptionsExercised_9666e9be-ccc6-423d-9382-513c9ff94312_verboseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromStockOptionsExercised" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from exercise of stock options</link:label>
    <link:label id="lab_us-gaap_ProceedsFromStockOptionsExercised_1530c9e5-61be-4a88-b54c-cd443d0d72f1_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromStockOptionsExercised" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash received from the exercise of stock options</link:label>
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    <link:label id="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_f3ab0fef-6cec-49bb-a88d-8c4ae12d56c3_terseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net loss attributable to common stockholders &#8212; basic</link:label>
    <link:label id="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_label_en-US" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Income (Loss) Available to Common Stockholders, Basic</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:to="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockSharesIssued_827e056d-266b-41ce-8bc3-f355d5725185_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesIssued" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common stock, shares issued (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesIssued_label_en-US" xlink:label="lab_us-gaap_CommonStockSharesIssued" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common Stock, Shares, Issued</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesIssued" xlink:to="lab_us-gaap_CommonStockSharesIssued" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_StockIssuanceProgramAuthorizedAmount_f88bae1f-bca1-4e8d-9619-d36a6795be8e_terseLabel_en-US" xlink:label="lab_mrsn_StockIssuanceProgramAuthorizedAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount of shares authorized to be offered and sold</link:label>
    <link:label id="lab_mrsn_StockIssuanceProgramAuthorizedAmount_label_en-US" xlink:label="lab_mrsn_StockIssuanceProgramAuthorizedAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Issuance Program, Authorized Amount</link:label>
    <link:label id="lab_mrsn_StockIssuanceProgramAuthorizedAmount_documentation_en-US" xlink:label="lab_mrsn_StockIssuanceProgramAuthorizedAmount" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount of common stock shares authorized to be issued under the program.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_StockIssuanceProgramAuthorizedAmount" xlink:href="mrsn-20220930.xsd#mrsn_StockIssuanceProgramAuthorizedAmount"/>
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    <link:label id="lab_mrsn_ContractWithCustomerLiabilityIncrease_34dbb028-3987-46a3-af10-7392e6d8e3f8_terseLabel_en-US" xlink:label="lab_mrsn_ContractWithCustomerLiabilityIncrease" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additions</link:label>
    <link:label id="lab_mrsn_ContractWithCustomerLiabilityIncrease_label_en-US" xlink:label="lab_mrsn_ContractWithCustomerLiabilityIncrease" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract with Customer, Liability, Increase</link:label>
    <link:label id="lab_mrsn_ContractWithCustomerLiabilityIncrease_documentation_en-US" xlink:label="lab_mrsn_ContractWithCustomerLiabilityIncrease" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount of increase in obligation to transfer good or service to customer for which consideration has been received or is receivable.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_ContractWithCustomerLiabilityIncrease" xlink:href="mrsn-20220930.xsd#mrsn_ContractWithCustomerLiabilityIncrease"/>
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    <link:label id="lab_us-gaap_NetIncomeLoss_569da2d3-eda7-4286-b594-c577a07c99da_totalLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net loss</link:label>
    <link:label id="lab_us-gaap_NetIncomeLoss_d02d21f5-4364-473e-aefa-7eb2891966fd_verboseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net (loss) income</link:label>
    <link:label id="lab_us-gaap_NetIncomeLoss_8e5dfc15-e72c-4d20-883f-da25ec21c061_terseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net loss</link:label>
    <link:label id="lab_us-gaap_NetIncomeLoss_label_en-US" xlink:label="lab_us-gaap_NetIncomeLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Income (Loss) Attributable to Parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLoss" xlink:to="lab_us-gaap_NetIncomeLoss" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_054f5acd-f668-4044-9bd4-0aa479205138_terseLabel_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Anti-dilutive securities</link:label>
    <link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_label_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:to="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityCurrent_5a68bfed-e2fb-4114-8490-063fef2646f6_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred revenue</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityCurrent_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract with Customer, Liability, Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerLiabilityCurrent" xlink:to="lab_us-gaap_ContractWithCustomerLiabilityCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_4099eb91-747d-481b-8a8f-697a670d916a_terseLabel_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Anti-dilutive securities (in shares)</link:label>
    <link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_label_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:to="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_AtMarketEquityOfferingProgramsMember_39cb51ab-4ec9-4aea-a0b6-51a97887a1a9_terseLabel_en-US" xlink:label="lab_mrsn_AtMarketEquityOfferingProgramsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">At market equity offering programs</link:label>
    <link:label id="lab_mrsn_AtMarketEquityOfferingProgramsMember_label_en-US" xlink:label="lab_mrsn_AtMarketEquityOfferingProgramsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">At Market Equity Offering Programs [Member]</link:label>
    <link:label id="lab_mrsn_AtMarketEquityOfferingProgramsMember_documentation_en-US" xlink:label="lab_mrsn_AtMarketEquityOfferingProgramsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">At Market Equity Offering Programs</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_AtMarketEquityOfferingProgramsMember" xlink:href="mrsn-20220930.xsd#mrsn_AtMarketEquityOfferingProgramsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_AtMarketEquityOfferingProgramsMember" xlink:to="lab_mrsn_AtMarketEquityOfferingProgramsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CapitalExpendituresIncurredButNotYetPaid_762102bd-0a60-4b5b-b699-742aa42916fe_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalExpendituresIncurredButNotYetPaid" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchases of property and equipment in accounts payable and accrued expenses</link:label>
    <link:label id="lab_us-gaap_CapitalExpendituresIncurredButNotYetPaid_label_en-US" xlink:label="lab_us-gaap_CapitalExpendituresIncurredButNotYetPaid" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital Expenditures Incurred but Not yet Paid</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CapitalExpendituresIncurredButNotYetPaid"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid" xlink:to="lab_us-gaap_CapitalExpendituresIncurredButNotYetPaid" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_d4b63907-53c0-4cce-bf91-32cfe1848465_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net cash used in investing activities</link:label>
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    <link:label id="lab_us-gaap_RelatedPartyDomain_3747fbd3-c23c-4241-89d8-2eebf5b87820_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related Party [Domain]</link:label>
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    <link:label id="lab_us-gaap_PlanNameAxis_2ebe607d-a7b0-4589-b7db-7548cf4f9284_terseLabel_en-US" xlink:label="lab_us-gaap_PlanNameAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan Name [Axis]</link:label>
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    <link:label id="lab_dei_EntityCurrentReportingStatus_0d715260-25df-42cc-83b1-df7f05ddf625_terseLabel_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Current Reporting Status</link:label>
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    <link:label id="lab_us-gaap_ContractWithCustomerAssetNet_c50fbf10-457f-40d4-86dc-fa755116dcbd_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerAssetNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract assets</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepreciationDepletionAndAmortization" xlink:to="lab_us-gaap_DepreciationDepletionAndAmortization" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NumberOfOperatingSegments_3cc015d3-dc2d-42b6-877c-773d0ba4f296_terseLabel_en-US" xlink:label="lab_us-gaap_NumberOfOperatingSegments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of operating segments</link:label>
    <link:label id="lab_us-gaap_NumberOfOperatingSegments_label_en-US" xlink:label="lab_us-gaap_NumberOfOperatingSegments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of Operating Segments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NumberOfOperatingSegments" xlink:to="lab_us-gaap_NumberOfOperatingSegments" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_a115c487-2fb3-49b9-8ff5-003f1d697bf1_terseLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term marketable securities</link:label>
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_997107a7-b238-44e6-a702-ca1c02f62ce5_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value</link:label>
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Securities, Available-for-Sale, Excluding Accrued Interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest" xlink:to="lab_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PlanNameDomain_0f6c3361-e18d-4f86-a437-62c5977fb12b_terseLabel_en-US" xlink:label="lab_us-gaap_PlanNameDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan Name [Domain]</link:label>
    <link:label id="lab_us-gaap_PlanNameDomain_label_en-US" xlink:label="lab_us-gaap_PlanNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Plan Name [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PlanNameDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PlanNameDomain" xlink:to="lab_us-gaap_PlanNameDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_IncreaseDecreaseInOperatingLeaseAssets_ed7a3b60-f1cb-4400-bb41-35379b8f7d35_terseLabel_en-US" xlink:label="lab_mrsn_IncreaseDecreaseInOperatingLeaseAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating lease right-of-use assets</link:label>
    <link:label id="lab_mrsn_IncreaseDecreaseInOperatingLeaseAssets_label_en-US" xlink:label="lab_mrsn_IncreaseDecreaseInOperatingLeaseAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) In Operating Lease Assets</link:label>
    <link:label id="lab_mrsn_IncreaseDecreaseInOperatingLeaseAssets_documentation_en-US" xlink:label="lab_mrsn_IncreaseDecreaseInOperatingLeaseAssets" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">The increase (decrease) during the reporting period in operating lease assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_IncreaseDecreaseInOperatingLeaseAssets" xlink:href="mrsn-20220930.xsd#mrsn_IncreaseDecreaseInOperatingLeaseAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_IncreaseDecreaseInOperatingLeaseAssets" xlink:to="lab_mrsn_IncreaseDecreaseInOperatingLeaseAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementOfCashFlowsAbstract_0893b324-bb13-451c-8c36-a480c3580a86_terseLabel_en-US" xlink:label="lab_us-gaap_StatementOfCashFlowsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of Cash Flows [Abstract]</link:label>
    <link:label id="lab_us-gaap_StatementOfCashFlowsAbstract_label_en-US" xlink:label="lab_us-gaap_StatementOfCashFlowsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of Cash Flows [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementOfCashFlowsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract" xlink:to="lab_us-gaap_StatementOfCashFlowsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressStateOrProvince_6debe3d9-4be5-472f-94c0-cb9cd34897bd_terseLabel_en-US" xlink:label="lab_dei_EntityAddressStateOrProvince" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, State or Province</link:label>
    <link:label id="lab_dei_EntityAddressStateOrProvince_label_en-US" xlink:label="lab_dei_EntityAddressStateOrProvince" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, State or Province</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressStateOrProvince"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressStateOrProvince" xlink:to="lab_dei_EntityAddressStateOrProvince" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_AccruedClinicalExpensesCurrent_016a0eb1-fbb7-47a4-8233-785c17c68a30_terseLabel_en-US" xlink:label="lab_mrsn_AccruedClinicalExpensesCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued clinical expenses</link:label>
    <link:label id="lab_mrsn_AccruedClinicalExpensesCurrent_label_en-US" xlink:label="lab_mrsn_AccruedClinicalExpensesCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued Clinical Expenses Current</link:label>
    <link:label id="lab_mrsn_AccruedClinicalExpensesCurrent_documentation_en-US" xlink:label="lab_mrsn_AccruedClinicalExpensesCurrent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Carrying value as of the balance sheet date of obligations incurred through that date and payable for clinical expense. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_AccruedClinicalExpensesCurrent" xlink:href="mrsn-20220930.xsd#mrsn_AccruedClinicalExpensesCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_AccruedClinicalExpensesCurrent" xlink:to="lab_mrsn_AccruedClinicalExpensesCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueInputsLevel1Member_21c87294-1ec2-4da3-ba95-8fe25e2df517_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Quoted&#160;Prices in&#160;Active Markets (Level&#160;1)</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel1Member_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value, Inputs, Level 1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel1Member" xlink:to="lab_us-gaap_FairValueInputsLevel1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_ClassOfWarrantOrRightSecuritiesCalledByWarrantsOrRightsNumberIssued_86ea1cc8-aef7-4cb9-a657-3c13f13d48c5_terseLabel_en-US" xlink:label="lab_mrsn_ClassOfWarrantOrRightSecuritiesCalledByWarrantsOrRightsNumberIssued" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares into which warrant issued during period may be converted (in shares)</link:label>
    <link:label id="lab_mrsn_ClassOfWarrantOrRightSecuritiesCalledByWarrantsOrRightsNumberIssued_label_en-US" xlink:label="lab_mrsn_ClassOfWarrantOrRightSecuritiesCalledByWarrantsOrRightsNumberIssued" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Warrant or Right, Securities Called by Warrants or Rights, Number Issued</link:label>
    <link:label id="lab_mrsn_ClassOfWarrantOrRightSecuritiesCalledByWarrantsOrRightsNumberIssued_documentation_en-US" xlink:label="lab_mrsn_ClassOfWarrantOrRightSecuritiesCalledByWarrantsOrRightsNumberIssued" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of securities into which the class of warrant or right issued during the period may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_ClassOfWarrantOrRightSecuritiesCalledByWarrantsOrRightsNumberIssued" xlink:href="mrsn-20220930.xsd#mrsn_ClassOfWarrantOrRightSecuritiesCalledByWarrantsOrRightsNumberIssued"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_ClassOfWarrantOrRightSecuritiesCalledByWarrantsOrRightsNumberIssued" xlink:to="lab_mrsn_ClassOfWarrantOrRightSecuritiesCalledByWarrantsOrRightsNumberIssued" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_31cc163f-b39d-42fd-b4da-65031a196e44_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of common stock under ESPP (in shares)</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Issued During Period, Shares, Employee Stock Purchase Plans</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EmployeeStockMember_2070f77a-0596-420d-a29e-43cfbc92e476_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeStockMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee stock purchase plan</link:label>
    <link:label id="lab_us-gaap_EmployeeStockMember_label_en-US" xlink:label="lab_us-gaap_EmployeeStockMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee Stock [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeStockMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EmployeeStockMember" xlink:to="lab_us-gaap_EmployeeStockMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_0ada66a5-557c-4962-9993-a72d9df99b6c_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares outstanding (in shares)</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_402bb595-a5c1-4e73-a73f-a20fd5bc8756_periodStartLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Outstanding at beginning of period (in shares)</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_d709d616-5e76-4a0a-b9d4-d7dc099aec71_periodEndLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Outstanding at end of period (in shares)</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AwardTypeAxis_49043447-4af8-4a76-be0f-6a323a5b903a_terseLabel_en-US" xlink:label="lab_us-gaap_AwardTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Award Type [Axis]</link:label>
    <link:label id="lab_us-gaap_AwardTypeAxis_label_en-US" xlink:label="lab_us-gaap_AwardTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Award Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AwardTypeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AwardTypeAxis" xlink:to="lab_us-gaap_AwardTypeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_AmendedCreditFacilityMember_de2e4ad8-12f3-4916-9e9a-3db110fa235f_terseLabel_en-US" xlink:label="lab_mrsn_AmendedCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amendment To Credit Facility</link:label>
    <link:label id="lab_mrsn_AmendedCreditFacilityMember_label_en-US" xlink:label="lab_mrsn_AmendedCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amended Credit Facility [Member]</link:label>
    <link:label id="lab_mrsn_AmendedCreditFacilityMember_documentation_en-US" xlink:label="lab_mrsn_AmendedCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amended Credit Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_AmendedCreditFacilityMember" xlink:href="mrsn-20220930.xsd#mrsn_AmendedCreditFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_AmendedCreditFacilityMember" xlink:to="lab_mrsn_AmendedCreditFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfStockByClassTable_974c50b8-c6f8-43f8-868b-b695cfcee6dc_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfStockByClassTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Stock by Class [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfStockByClassTable_label_en-US" xlink:label="lab_us-gaap_ScheduleOfStockByClassTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Stock by Class [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable" xlink:to="lab_us-gaap_ScheduleOfStockByClassTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_c7c9a8a3-635c-4bc0-8f7d-1132af3ca7d9_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net cash provided by (used in) operating activities</link:label>
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    <link:label id="lab_us-gaap_OperatingLeaseLiabilityCurrent_427105ca-2eb8-4814-933c-080f0bd8c410_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating lease liabilities</link:label>
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsAbstract_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash and Cash Equivalents [Abstract]</link:label>
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    <link:label id="lab_us-gaap_DeferredCompensationShareBasedPaymentsMember_4eb06a08-3e1d-4804-bbce-d938a1b05473_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredCompensationShareBasedPaymentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based payments</link:label>
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    <link:label id="lab_us-gaap_LongTermDebt_80a5136c-5f10-4f3a-9e30-18ec02f5cc23_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term debt, net</link:label>
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    <link:label id="lab_us-gaap_LongTermDebt_label_en-US" xlink:label="lab_us-gaap_LongTermDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-Term Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebt" xlink:to="lab_us-gaap_LongTermDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongTermDebtNoncurrent_489bcd22-efc4-4efe-bff5-233ae305c16c_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total debt, net of current portion</link:label>
    <link:label id="lab_us-gaap_LongTermDebtNoncurrent_label_en-US" xlink:label="lab_us-gaap_LongTermDebtNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-Term Debt, Excluding Current Maturities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtNoncurrent" xlink:to="lab_us-gaap_LongTermDebtNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_ContractWithCustomerLiabilityDecrease_12e7f9f7-68e8-4745-8324-8ecbe02cf608_terseLabel_en-US" xlink:label="lab_mrsn_ContractWithCustomerLiabilityDecrease" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deductions</link:label>
    <link:label id="lab_mrsn_ContractWithCustomerLiabilityDecrease_label_en-US" xlink:label="lab_mrsn_ContractWithCustomerLiabilityDecrease" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract with Customer, Liability, Decrease</link:label>
    <link:label id="lab_mrsn_ContractWithCustomerLiabilityDecrease_documentation_en-US" xlink:label="lab_mrsn_ContractWithCustomerLiabilityDecrease" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount of decrease in obligation to transfer good or service to customer for which consideration has been received or is receivable.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_ContractWithCustomerLiabilityDecrease" xlink:href="mrsn-20220930.xsd#mrsn_ContractWithCustomerLiabilityDecrease"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_ContractWithCustomerLiabilityDecrease" xlink:to="lab_mrsn_ContractWithCustomerLiabilityDecrease" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockSharesAuthorized_a91b4b0c-fb46-4d9d-ba61-ee618140a672_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesAuthorized" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common stock, shares authorized (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesAuthorized_label_en-US" xlink:label="lab_us-gaap_CommonStockSharesAuthorized" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common Stock, Shares Authorized</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesAuthorized" xlink:to="lab_us-gaap_CommonStockSharesAuthorized" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_Liabilities_49c311a9-53b6-47d8-9ac3-c9634e768f49_totalLabel_en-US" xlink:label="lab_us-gaap_Liabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total liabilities</link:label>
    <link:label id="lab_us-gaap_Liabilities_label_en-US" xlink:label="lab_us-gaap_Liabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Liabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Liabilities" xlink:to="lab_us-gaap_Liabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8fc818aa-7f35-4b1b-be5d-974f1c8c0b5c_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock options</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OperatingExpenses_c0d60bd6-40e2-46c8-b814-1580e9da853d_totalLabel_en-US" xlink:label="lab_us-gaap_OperatingExpenses" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total operating expenses</link:label>
    <link:label id="lab_us-gaap_OperatingExpenses_label_en-US" xlink:label="lab_us-gaap_OperatingExpenses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating Expenses</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingExpenses"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingExpenses" xlink:to="lab_us-gaap_OperatingExpenses" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_MaximumMember_1f36146a-528b-41ec-8945-4cb801e1215b_terseLabel_en-US" xlink:label="lab_srt_MaximumMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Maximum</link:label>
    <link:label id="lab_srt_MaximumMember_label_en-US" xlink:label="lab_srt_MaximumMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Maximum [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MaximumMember" xlink:to="lab_srt_MaximumMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_c0076b5f-e425-42b1-aac5-80529b568fb7_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from investing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_8a39a077-41ff-49da-a36f-f552732f20b8_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated other comprehensive (loss) income</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss), Net of Tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_NewCreditFacilityMember_23efad76-364f-4b90-bc85-bb251504cd31_terseLabel_en-US" xlink:label="lab_mrsn_NewCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New Credit Facility</link:label>
    <link:label id="lab_mrsn_NewCreditFacilityMember_label_en-US" xlink:label="lab_mrsn_NewCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New Credit Facility [Member]</link:label>
    <link:label id="lab_mrsn_NewCreditFacilityMember_documentation_en-US" xlink:label="lab_mrsn_NewCreditFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New Credit Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_NewCreditFacilityMember" xlink:href="mrsn-20220930.xsd#mrsn_NewCreditFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_NewCreditFacilityMember" xlink:to="lab_mrsn_NewCreditFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardGrantsInPeriodGross_3904a7ab-7c46-4b0c-a20e-bf58c7758de8_terseLabel_en-US" xlink:label="lab_mrsn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardGrantsInPeriodGross" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of options granted in period (in shares)</link:label>
    <link:label id="lab_mrsn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardGrantsInPeriodGross_label_en-US" xlink:label="lab_mrsn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardGrantsInPeriodGross" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Arrangements By Share-based Payment Award, Grants In Period, Gross</link:label>
    <link:label id="lab_mrsn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardGrantsInPeriodGross_documentation_en-US" xlink:label="lab_mrsn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardGrantsInPeriodGross" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">The number of grants made during the period for share options (or share units) and for other than stock (or unit) options, including but not limited to, restricted stock options (or units). This amount does not include options granted as part of an inducement award.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardGrantsInPeriodGross" xlink:href="mrsn-20220930.xsd#mrsn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardGrantsInPeriodGross"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardGrantsInPeriodGross" xlink:to="lab_mrsn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardGrantsInPeriodGross" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_8f32d336-6388-4a14-abab-d3e6b52c7034_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of common stock under public offering, net of issuance costs</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Issued During Period, Value, New Issues</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityCommonStockSharesOutstanding_2d12db5d-b45f-4a6e-8b25-e4381aaefd34_terseLabel_en-US" xlink:label="lab_dei_EntityCommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Common Stock, Shares Outstanding</link:label>
    <link:label id="lab_dei_EntityCommonStockSharesOutstanding_label_en-US" xlink:label="lab_dei_EntityCommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Common Stock, Shares Outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCommonStockSharesOutstanding" xlink:to="lab_dei_EntityCommonStockSharesOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_765e53b8-a729-4746-8646-9a2853c74164_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value Hierarchy [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value Hierarchy and NAV [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_8288d21e-0596-41f8-9368-a9eb0a7fae0e_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash and cash equivalents</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_6012bf6b-3e17-4bcb-9458-ca30477bbe33_periodStartLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash and cash equivalents at beginning of period</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_91ac7d2c-88de-4340-9fdb-d367fe8c6443_periodEndLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash and cash equivalents at end of period</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash and Cash Equivalents, at Carrying Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:to="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_ContractualLifeOfWarrants_2ba34a65-50a0-4f15-8b39-57d0c8696deb_terseLabel_en-US" xlink:label="lab_mrsn_ContractualLifeOfWarrants" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contractual life of warrants</link:label>
    <link:label id="lab_mrsn_ContractualLifeOfWarrants_label_en-US" xlink:label="lab_mrsn_ContractualLifeOfWarrants" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contractual Life of Warrants</link:label>
    <link:label id="lab_mrsn_ContractualLifeOfWarrants_documentation_en-US" xlink:label="lab_mrsn_ContractualLifeOfWarrants" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">The contractual life of warrants.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_ContractualLifeOfWarrants" xlink:href="mrsn-20220930.xsd#mrsn_ContractualLifeOfWarrants"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_ContractualLifeOfWarrants" xlink:to="lab_mrsn_ContractualLifeOfWarrants" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_f2c4a2ca-bac6-43ea-a6d9-940365afc9dc_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInContractWithCustomerLiability" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred revenue</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInContractWithCustomerLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Contract with Customer, Liability</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability" xlink:to="lab_us-gaap_IncreaseDecreaseInContractWithCustomerLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AssetsCurrent_9de925de-a4f3-4081-a91c-021da6444324_totalLabel_en-US" xlink:label="lab_us-gaap_AssetsCurrent" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total current assets</link:label>
    <link:label id="lab_us-gaap_AssetsCurrent_label_en-US" xlink:label="lab_us-gaap_AssetsCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets, Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsCurrent" xlink:to="lab_us-gaap_AssetsCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PreferredStockSharesIssued_b09a9658-627d-4d79-b901-70e0d7c67c52_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockSharesIssued" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred stock, shares issued (in shares)</link:label>
    <link:label id="lab_us-gaap_PreferredStockSharesIssued_label_en-US" xlink:label="lab_us-gaap_PreferredStockSharesIssued" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred Stock, Shares Issued</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesIssued" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PreferredStockSharesIssued"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockSharesIssued" xlink:to="lab_us-gaap_PreferredStockSharesIssued" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentType_f6805e4a-f6f8-4d6f-9d68-98795f840da9_terseLabel_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Type</link:label>
    <link:label id="lab_dei_DocumentType_label_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Type</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentType"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentType" xlink:to="lab_dei_DocumentType" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_0987f52b-265d-47b6-9782-ca861fce1912_terseLabel_en-US" xlink:label="lab_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Research and Development Arrangement, Contract to Perform for Others, Type [Domain]</link:label>
    <link:label id="lab_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_label_en-US" xlink:label="lab_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Research and Development Arrangement, Contract to Perform for Others, Type [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain" xlink:to="lab_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_f96d0d99-32dd-4073-953a-d1d2bee09c91_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityRevenueRecognized" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amounts included in the contract liability at the beginning of the period</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityRevenueRecognized" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract with Customer, Liability, Revenue Recognized</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized" xlink:to="lab_us-gaap_ContractWithCustomerLiabilityRevenueRecognized" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_a60ed8d3-0032-4226-a996-b631ca1c6a1e_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted- Average Exercise&#160;Price</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntitySmallBusiness_e30649d4-9f3f-4318-9d54-f9b10d38c764_terseLabel_en-US" xlink:label="lab_dei_EntitySmallBusiness" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Small Business</link:label>
    <link:label id="lab_dei_EntitySmallBusiness_label_en-US" xlink:label="lab_dei_EntitySmallBusiness" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Small Business</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntitySmallBusiness"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntitySmallBusiness" xlink:to="lab_dei_EntitySmallBusiness" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherCommitmentsTable_260d451a-0a85-4c3b-adc4-e6e7491e6a85_terseLabel_en-US" xlink:label="lab_us-gaap_OtherCommitmentsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Commitments [Table]</link:label>
    <link:label id="lab_us-gaap_OtherCommitmentsTable_label_en-US" xlink:label="lab_us-gaap_OtherCommitmentsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Commitments [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsTable" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherCommitmentsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherCommitmentsTable" xlink:to="lab_us-gaap_OtherCommitmentsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SharesOutstanding_b7ecc9b8-7001-4c10-b428-77f88027c6a8_periodStartLabel_en-US" xlink:label="lab_us-gaap_SharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance at beginning of period (in shares)</link:label>
    <link:label id="lab_us-gaap_SharesOutstanding_86845d49-4a95-4fd7-94b6-3a1b0434b396_periodEndLabel_en-US" xlink:label="lab_us-gaap_SharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance at end of period (in shares)</link:label>
    <link:label id="lab_us-gaap_SharesOutstanding_label_en-US" xlink:label="lab_us-gaap_SharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shares, Outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesOutstanding" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SharesOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharesOutstanding" xlink:to="lab_us-gaap_SharesOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueMeasurementFrequencyDomain_788af1a0-166a-473d-9afb-16a1c9259018_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementFrequencyDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value, Measurement Frequency [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementFrequencyDomain_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementFrequencyDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Measurement Frequency [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain" xlink:to="lab_us-gaap_FairValueMeasurementFrequencyDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_cdc90edb-9edb-4924-9384-eff7942ab461_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stockholders&#8217; equity</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stockholders' Equity Note Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityNoteDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:to="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AssetsFairValueDisclosureAbstract_7e5fb954-73bc-4ae7-a3cb-a5274d66ffea_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsFairValueDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets, Fair Value Disclosure [Abstract]</link:label>
    <link:label id="lab_us-gaap_AssetsFairValueDisclosureAbstract_label_en-US" xlink:label="lab_us-gaap_AssetsFairValueDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets, Fair Value Disclosure [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsFairValueDisclosureAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract" xlink:to="lab_us-gaap_AssetsFairValueDisclosureAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_CollaborationAndCommercialLicenseAgreementAndSupplyAgreementMerckKgaaMember_c5f90542-80c6-42a8-9828-1238492c015b_terseLabel_en-US" xlink:label="lab_mrsn_CollaborationAndCommercialLicenseAgreementAndSupplyAgreementMerckKgaaMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">License and supply agreement Merck KGaA</link:label>
    <link:label id="lab_mrsn_CollaborationAndCommercialLicenseAgreementAndSupplyAgreementMerckKgaaMember_label_en-US" xlink:label="lab_mrsn_CollaborationAndCommercialLicenseAgreementAndSupplyAgreementMerckKgaaMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Collaboration And Commercial License Agreement And Supply Agreement Merck Kgaa [Member]</link:label>
    <link:label id="lab_mrsn_CollaborationAndCommercialLicenseAgreementAndSupplyAgreementMerckKgaaMember_documentation_en-US" xlink:label="lab_mrsn_CollaborationAndCommercialLicenseAgreementAndSupplyAgreementMerckKgaaMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Represents information pertaining to the Collaboration and Commercial License Agreement with Merck KGaA and the Supply Agreement with Merck KGaA.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_CollaborationAndCommercialLicenseAgreementAndSupplyAgreementMerckKgaaMember" xlink:href="mrsn-20220930.xsd#mrsn_CollaborationAndCommercialLicenseAgreementAndSupplyAgreementMerckKgaaMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_CollaborationAndCommercialLicenseAgreementAndSupplyAgreementMerckKgaaMember" xlink:to="lab_mrsn_CollaborationAndCommercialLicenseAgreementAndSupplyAgreementMerckKgaaMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_eeb88f6c-621e-4007-baea-6e5718010c0e_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expected recognition period</link:label>
    <link:label id="lab_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_label_en-US" xlink:label="lab_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1" xlink:to="lab_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_2478677f-a37f-42e9-ab98-1f43bd8aef57_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtDisclosureTextBlock_c7b2b80f-88e6-43c3-8b87-3e39eb67a2b9_terseLabel_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt</link:label>
    <link:label id="lab_us-gaap_DebtDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtDisclosureTextBlock" xlink:to="lab_us-gaap_DebtDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_bd8ba57d-b1c0-44f4-adf2-61b94b8bea07_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of marketable securities</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments to Acquire Debt Securities, Available-for-Sale</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt" xlink:to="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SignificantAccountingPoliciesTextBlock_a606630a-a109-4f35-805f-944020507ef3_terseLabel_en-US" xlink:label="lab_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Summary of significant accounting policies</link:label>
    <link:label id="lab_us-gaap_SignificantAccountingPoliciesTextBlock_label_en-US" xlink:label="lab_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant Accounting Policies [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SignificantAccountingPoliciesTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:to="lab_us-gaap_SignificantAccountingPoliciesTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ProductsAndServicesDomain_decc7f05-b542-41a3-9258-696e7a0c2516_terseLabel_en-US" xlink:label="lab_srt_ProductsAndServicesDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Products and Services [Domain]</link:label>
    <link:label id="lab_srt_ProductsAndServicesDomain_label_en-US" xlink:label="lab_srt_ProductsAndServicesDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Product and Service [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ProductsAndServicesDomain" xlink:to="lab_srt_ProductsAndServicesDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityShellCompany_bf935bc4-e3a3-49e8-89bb-bc94cbfcc29b_terseLabel_en-US" xlink:label="lab_dei_EntityShellCompany" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Shell Company</link:label>
    <link:label id="lab_dei_EntityShellCompany_label_en-US" xlink:label="lab_dei_EntityShellCompany" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Shell Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityShellCompany"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityShellCompany" xlink:to="lab_dei_EntityShellCompany" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_fd9f0d3a-e8bf-4d10-8ab0-5988e9a286f3_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of&#160;Shares</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccruedLiabilities_38f492be-3202-4cf1-88a9-d0afa0a1c721_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued expenses</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccruedLiabilities_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Accrued Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:to="lab_us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_NewCreditFacilityTrancheOneMember_918725ab-fe2e-4ca7-b9da-b8c33f7d1759_terseLabel_en-US" xlink:label="lab_mrsn_NewCreditFacilityTrancheOneMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New Credit Facility, Tranche One</link:label>
    <link:label id="lab_mrsn_NewCreditFacilityTrancheOneMember_label_en-US" xlink:label="lab_mrsn_NewCreditFacilityTrancheOneMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New Credit Facility, Tranche One [Member]</link:label>
    <link:label id="lab_mrsn_NewCreditFacilityTrancheOneMember_documentation_en-US" xlink:label="lab_mrsn_NewCreditFacilityTrancheOneMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New Credit Facility, Tranche One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_NewCreditFacilityTrancheOneMember" xlink:href="mrsn-20220930.xsd#mrsn_NewCreditFacilityTrancheOneMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_NewCreditFacilityTrancheOneMember" xlink:to="lab_mrsn_NewCreditFacilityTrancheOneMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_DevelopmentalCommercialAndRegulatoryMember_c02e9ac5-ac71-4da5-b035-52c248030b29_terseLabel_en-US" xlink:label="lab_mrsn_DevelopmentalCommercialAndRegulatoryMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Development, Regulatory &amp; Commercial</link:label>
    <link:label id="lab_mrsn_DevelopmentalCommercialAndRegulatoryMember_label_en-US" xlink:label="lab_mrsn_DevelopmentalCommercialAndRegulatoryMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Developmental, Commercial, And Regulatory [Member]</link:label>
    <link:label id="lab_mrsn_DevelopmentalCommercialAndRegulatoryMember_documentation_en-US" xlink:label="lab_mrsn_DevelopmentalCommercialAndRegulatoryMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Developmental, Commercial, And Regulatory</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_DevelopmentalCommercialAndRegulatoryMember" xlink:href="mrsn-20220930.xsd#mrsn_DevelopmentalCommercialAndRegulatoryMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_DevelopmentalCommercialAndRegulatoryMember" xlink:to="lab_mrsn_DevelopmentalCommercialAndRegulatoryMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition_bfa18353-764a-4ae7-aefa-4ab48358810d_terseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of common stock under ESPP</link:label>
    <link:label id="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition_label_en-US" xlink:label="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">APIC, Share-Based Payment Arrangement, ESPP, Increase for Cost Recognition</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition" xlink:to="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximumCumulativeAnnualIncrease_6d59c08b-593c-455b-8d72-c0f820ac4f87_terseLabel_en-US" xlink:label="lab_mrsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximumCumulativeAnnualIncrease" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cumulative annual increase in number of shares issuable</link:label>
    <link:label id="lab_mrsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximumCumulativeAnnualIncrease_label_en-US" xlink:label="lab_mrsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximumCumulativeAnnualIncrease" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Arrangement By Share-based Payment Award, Percentage Of Outstanding Stock Maximum, Cumulative Annual Increase</link:label>
    <link:label id="lab_mrsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximumCumulativeAnnualIncrease_documentation_en-US" xlink:label="lab_mrsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximumCumulativeAnnualIncrease" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Maximum number of shares that may be cumulatively increased annually in accordance with the plan, as a percentage of outstanding capital stock.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximumCumulativeAnnualIncrease" xlink:href="mrsn-20220930.xsd#mrsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximumCumulativeAnnualIncrease"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximumCumulativeAnnualIncrease" xlink:to="lab_mrsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximumCumulativeAnnualIncrease" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FinancialInstrumentAxis_4453cdb2-5664-4743-a6d7-f33b957e7285_terseLabel_en-US" xlink:label="lab_us-gaap_FinancialInstrumentAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Instrument [Axis]</link:label>
    <link:label id="lab_us-gaap_FinancialInstrumentAxis_label_en-US" xlink:label="lab_us-gaap_FinancialInstrumentAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Instrument [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancialInstrumentAxis" xlink:to="lab_us-gaap_FinancialInstrumentAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_Security12bTitle_68f64fd1-7327-4d5b-8a63-1dfa60e09247_terseLabel_en-US" xlink:label="lab_dei_Security12bTitle" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:label id="lab_dei_Security12bTitle_label_en-US" xlink:label="lab_dei_Security12bTitle" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_Security12bTitle"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_Security12bTitle" xlink:to="lab_dei_Security12bTitle" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_NewCreditFacilityTrancheThreeMember_b2e151fc-cb9d-49e9-9679-0bb2352fb648_terseLabel_en-US" xlink:label="lab_mrsn_NewCreditFacilityTrancheThreeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New Credit Facility, Tranche Three</link:label>
    <link:label id="lab_mrsn_NewCreditFacilityTrancheThreeMember_label_en-US" xlink:label="lab_mrsn_NewCreditFacilityTrancheThreeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New Credit Facility, Tranche Three [Member]</link:label>
    <link:label id="lab_mrsn_NewCreditFacilityTrancheThreeMember_documentation_en-US" xlink:label="lab_mrsn_NewCreditFacilityTrancheThreeMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">New Credit Facility, Tranche Three</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_NewCreditFacilityTrancheThreeMember" xlink:href="mrsn-20220930.xsd#mrsn_NewCreditFacilityTrancheThreeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_NewCreditFacilityTrancheThreeMember" xlink:to="lab_mrsn_NewCreditFacilityTrancheThreeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock_972d4da3-1f27-44be-8ada-8724fc1479a4_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Changes in the Balance of Our Contract Assets and Liabilities and Recognized Revenue</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock" xlink:to="lab_us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentPeriodEndDate_316e124c-a5b9-44e6-904b-b59ef0059cee_terseLabel_en-US" xlink:label="lab_dei_DocumentPeriodEndDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Period End Date</link:label>
    <link:label id="lab_dei_DocumentPeriodEndDate_label_en-US" xlink:label="lab_dei_DocumentPeriodEndDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Period End Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentPeriodEndDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentPeriodEndDate" xlink:to="lab_dei_DocumentPeriodEndDate" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_LicenseAgreementUpfrontPaymentsMember_21158281-af92-4085-94df-9eaee7cce486_terseLabel_en-US" xlink:label="lab_mrsn_LicenseAgreementUpfrontPaymentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">License Agreement, Upfront Payments</link:label>
    <link:label id="lab_mrsn_LicenseAgreementUpfrontPaymentsMember_label_en-US" xlink:label="lab_mrsn_LicenseAgreementUpfrontPaymentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">License Agreement, Upfront Payments [Member]</link:label>
    <link:label id="lab_mrsn_LicenseAgreementUpfrontPaymentsMember_documentation_en-US" xlink:label="lab_mrsn_LicenseAgreementUpfrontPaymentsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">License Agreement, Upfront Payments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_LicenseAgreementUpfrontPaymentsMember" xlink:href="mrsn-20220930.xsd#mrsn_LicenseAgreementUpfrontPaymentsMember"/>
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    <link:label id="lab_us-gaap_RepaymentsOfLinesOfCredit_294518ea-f7e5-46af-8d68-16ff5ca765e7_terseLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLinesOfCredit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Repayments of lines of credit</link:label>
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    <link:label id="lab_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract_label_en-US" xlink:label="lab_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract]</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentLineItems_9522d79a-32ce-45f0-a2ea-c342ccd127ee_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentLineItems" xlink:to="lab_us-gaap_DebtInstrumentLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleTable_2d3e518c-2cb4-4da8-b2fa-8f72dfe51ad6_terseLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Securities, Available-for-sale [Table]</link:label>
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleTable_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Securities, Available-for-Sale [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
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    <link:label id="lab_us-gaap_ClassOfStockLineItems_label_en-US" xlink:label="lab_us-gaap_ClassOfStockLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Stock [Line Items]</link:label>
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    <link:label id="lab_mrsn_StockIssuanceDiscountsAndCommissionsOnTransaction_3ef336b5-950e-4225-ba7a-9a5f5b172689_terseLabel_en-US" xlink:label="lab_mrsn_StockIssuanceDiscountsAndCommissionsOnTransaction" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock issuance costs</link:label>
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    <link:label id="lab_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_d9ba543b-84b3-43bb-ba06-1bc4bbebdc3a_terseLabel_en-US" xlink:label="lab_us-gaap_USGovernmentAgenciesDebtSecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">U.S. government agency securities</link:label>
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    <link:label id="lab_us-gaap_Assets_98565eac-20bd-4d2a-8806-d68e73c719b6_totalLabel_en-US" xlink:label="lab_us-gaap_Assets" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total assets</link:label>
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    <link:label id="lab_mrsn_StockIncentivePlan2017Member_documentation_en-US" xlink:label="lab_mrsn_StockIncentivePlan2017Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Represents information pertaining to 2017 Stock incentive plan.</link:label>
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    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest_b26012b9-a1a1-42e0-884e-17bdcb9ccd9a_terseLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Charges for credit-related impairments</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest"/>
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    <link:label id="lab_us-gaap_DebtDisclosureAbstract_be6657d4-aa40-4945-910a-2eb187ecb947_terseLabel_en-US" xlink:label="lab_us-gaap_DebtDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Disclosure [Abstract]</link:label>
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    <link:label id="lab_us-gaap_EarningsPerShareAbstract_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Per Share [Abstract]</link:label>
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    <link:label id="lab_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_label_en-US" xlink:label="lab_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investments, Debt and Equity Securities [Abstract]</link:label>
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    <link:label id="lab_us-gaap_IncomeStatementLocationAxis_eeab94a6-9f89-4c70-af22-5723d6c9e4c8_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Statement Location [Axis]</link:label>
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    <link:label id="lab_us-gaap_InterestExpenseDebt_label_en-US" xlink:label="lab_us-gaap_InterestExpenseDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest Expense, Debt</link:label>
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    <link:label id="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_a3f02164-565e-4061-b77b-0348acc162cf_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued payroll and related expenses</link:label>
    <link:label id="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_label_en-US" xlink:label="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee-related Liabilities, Current</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:to="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditMember_1a5182ec-8831-4e50-ad4b-1362d9cc1ad0_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line of Credit</link:label>
    <link:label id="lab_us-gaap_LineOfCreditMember_label_en-US" xlink:label="lab_us-gaap_LineOfCreditMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Line of Credit [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditMember" xlink:to="lab_us-gaap_LineOfCreditMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccountsPayableCurrent_e6d4e3cd-e347-4e20-a9d3-36340590baba_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsPayableCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts payable</link:label>
    <link:label id="lab_us-gaap_AccountsPayableCurrent_label_en-US" xlink:label="lab_us-gaap_AccountsPayableCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounts Payable, Current</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsPayableCurrent" xlink:to="lab_us-gaap_AccountsPayableCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersCostsIncurredGross_552d4b00-92e7-4c65-9d9e-51549a52a32a_terseLabel_en-US" xlink:label="lab_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersCostsIncurredGross" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Research and development expense</link:label>
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    <link:label id="lab_us-gaap_StockholdersEquityAbstract_48ab9c43-292c-4ff3-9c37-b3826f4afaa8_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stockholders' equity:</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityAbstract_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stockholders' Equity Attributable to Parent [Abstract]</link:label>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_6e86362e-02cf-45da-895b-c1ebf3d09d8c_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other assets</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentUnamortizedDiscount_e3416c23-bf94-4c62-8aef-138bae25dc95_negatedLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnamortizedDiscount" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt financing costs, net of accretion</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentUnamortizedDiscount" xlink:to="lab_us-gaap_DebtInstrumentUnamortizedDiscount" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_CollaborationArrangementsAdditionalPaymentToObtainDevelopmentAndCommercialLicense_54795c55-afc8-4b53-bf68-e54074b9928f_terseLabel_en-US" xlink:label="lab_mrsn_CollaborationArrangementsAdditionalPaymentToObtainDevelopmentAndCommercialLicense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount of additional fees receivable when target is designated and commercial license to target is granted</link:label>
    <link:label id="lab_mrsn_CollaborationArrangementsAdditionalPaymentToObtainDevelopmentAndCommercialLicense_label_en-US" xlink:label="lab_mrsn_CollaborationArrangementsAdditionalPaymentToObtainDevelopmentAndCommercialLicense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Collaboration Arrangements, Additional Payment to Obtain a Development and Commercial License</link:label>
    <link:label id="lab_mrsn_CollaborationArrangementsAdditionalPaymentToObtainDevelopmentAndCommercialLicense_documentation_en-US" xlink:label="lab_mrsn_CollaborationArrangementsAdditionalPaymentToObtainDevelopmentAndCommercialLicense" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount of additional fees receivable when a target is designated and the commercial license to the target is granted under terms of the agreement.</link:label>
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    <link:label id="lab_us-gaap_EarningsPerShareTextBlock_0d6931e2-f1e8-43f9-822f-2697ceb1b11f_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net loss per share</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_22e7ed09-da75-4cd2-8150-28163a6b5090_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Weighted Average Assumptions for Estimating Fair Value of Option Awards</link:label>
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    <link:label id="lab_us-gaap_WarrantMember_130536eb-88e9-4934-a966-38529fcddd4c_terseLabel_en-US" xlink:label="lab_us-gaap_WarrantMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Warrants</link:label>
    <link:label id="lab_us-gaap_WarrantMember_label_en-US" xlink:label="lab_us-gaap_WarrantMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Warrant [Member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WarrantMember" xlink:to="lab_us-gaap_WarrantMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock_0d082c87-1a69-49c5-b77f-df71ae05f137_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash and Cash Equivalents</link:label>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingLeaseLiability_1f55096f-bb7e-45a3-a389-88c76d7f78d1_verboseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingLeaseLiability" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating lease liabilities</link:label>
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    <link:label id="lab_dei_EntityFilerCategory_2ec2e6bc-7baa-4157-9d73-7a854aac3222_terseLabel_en-US" xlink:label="lab_dei_EntityFilerCategory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Filer Category</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_14867046-f51b-473f-bfd5-b9dbb745173b_verboseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net proceeds from at-the-market facilities</link:label>
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    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_510df5ab-9c44-4e38-bb15-84d3b82b2cce_terseLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt securities, available-for-sale, unrealized loss position, accumulated loss</link:label>
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    <link:label id="lab_us-gaap_AccruedLiabilitiesCurrentAbstract_8968804a-bac9-41e6-bb6f-ee8396035ef4_terseLabel_en-US" xlink:label="lab_us-gaap_AccruedLiabilitiesCurrentAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued Liabilities, Current [Abstract]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrentAbstract" xlink:to="lab_us-gaap_AccruedLiabilitiesCurrentAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AllocatedShareBasedCompensationExpense_c78eb532-cb2a-4728-a217-d862f0bd3ba0_verboseLabel_en-US" xlink:label="lab_us-gaap_AllocatedShareBasedCompensationExpense" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock-based compensation expense included in total operating expenses</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
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    <link:label id="lab_mrsn_GSKAgreementMember_bb38afa9-5a02-4103-90a3-d105b824889d_terseLabel_en-US" xlink:label="lab_mrsn_GSKAgreementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">GSK Agreement</link:label>
    <link:label id="lab_mrsn_GSKAgreementMember_label_en-US" xlink:label="lab_mrsn_GSKAgreementMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">GSK Agreement [Member]</link:label>
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    <link:label id="lab_us-gaap_CommitmentsAndContingencies_a74bce39-4f70-4b0d-8f1a-deacee80aa78_verboseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitments (Note 11)</link:label>
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    <link:label id="lab_dei_SecurityExchangeName_80744b31-b344-43a2-90a5-b519d0cb833e_terseLabel_en-US" xlink:label="lab_dei_SecurityExchangeName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Security Exchange Name</link:label>
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    <link:label id="lab_dei_EntityRegistrantName_d60c7144-af9d-4402-b39c-11b4f4a53f76_terseLabel_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Registrant Name</link:label>
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    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_861f43fb-29f9-4c0a-9a7c-973876429b47_periodStartLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Outstanding at beginning of period (in dollars per share)</link:label>
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    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_6c855ebe-362a-4eee-8804-45768bceb56f_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of common stock under public offering, net of issuance costs (in shares)</link:label>
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    <link:label id="lab_mrsn_SupplyAgreementMerckKgaaMember_3fe35382-2e6c-49e2-8840-44d0a1423505_terseLabel_en-US" xlink:label="lab_mrsn_SupplyAgreementMerckKgaaMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Merck KGaA Supply Agreement</link:label>
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    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_0b37259d-7989-42b8-9580-bca9f3be76fd_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expected dividend yield</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
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    <link:label id="lab_us-gaap_ScheduleOfDebtTableTextBlock_a9f9c613-032f-4a30-b876-8ea4bb296a51_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDebtTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Debt</link:label>
    <link:label id="lab_us-gaap_ScheduleOfDebtTableTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDebtTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Debt [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDebtTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfDebtTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDebtTableTextBlock" xlink:to="lab_us-gaap_ScheduleOfDebtTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_GeneralAndAdministrativeExpenseMember_c44b6703-39b6-4b9a-9d0c-3ce22b87f9ac_terseLabel_en-US" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpenseMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">General and administrative</link:label>
    <link:label id="lab_us-gaap_GeneralAndAdministrativeExpenseMember_label_en-US" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpenseMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">General and Administrative Expense [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpenseMember" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GeneralAndAdministrativeExpenseMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GeneralAndAdministrativeExpenseMember" xlink:to="lab_us-gaap_GeneralAndAdministrativeExpenseMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_e86a47fd-622f-43e7-9088-dafea199b382_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Collaboration revenue</link:label>
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_label_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue from Contract with Customer, Excluding Assessed Tax</link:label>
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    <link:label id="lab_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_aaa3e3a1-e083-4aa2-b51d-92d853053288_terseLabel_en-US" xlink:label="lab_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Research and Development Arrangement, Contract to Perform for Others, Type [Axis]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis"/>
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    <link:label id="lab_dei_EntityAddressCityOrTown_09704157-7b60-452d-8d23-16d25129534a_terseLabel_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, City or Town</link:label>
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    <link:label id="lab_mrsn_StockIncentivePlan2007Member_6f51ca6a-b5b2-4400-8ca6-8ffe53f32136_terseLabel_en-US" xlink:label="lab_mrsn_StockIncentivePlan2007Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2007 Plan</link:label>
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    <link:label id="lab_mrsn_StockIncentivePlan2007Member_documentation_en-US" xlink:label="lab_mrsn_StockIncentivePlan2007Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Represents information pertaining to 2007 Stock incentive plan.</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_StockIncentivePlan2007Member" xlink:to="lab_mrsn_StockIncentivePlan2007Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_0a90ebff-6bf1-459e-8cb5-9b2400a8780a_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares reserved for future issuance (in shares)</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:to="lab_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OperatingExpensesAbstract_b12bd589-dada-4e65-9916-a4347bdc4e95_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingExpensesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating expenses:</link:label>
    <link:label id="lab_us-gaap_OperatingExpensesAbstract_label_en-US" xlink:label="lab_us-gaap_OperatingExpensesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating Expenses [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpensesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingExpensesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingExpensesAbstract" xlink:to="lab_us-gaap_OperatingExpensesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_CoverAbstract_label_en-US" xlink:label="lab_dei_CoverAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cover [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_CoverAbstract"/>
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    <link:label id="lab_us-gaap_DebtInstrumentTable_5c80f37e-c769-4ab1-8636-635923d93fdd_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Long-term Debt Instruments [Table]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentTable_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Long-Term Debt Instruments [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentTable" xlink:to="lab_us-gaap_DebtInstrumentTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueInputsLevel3Member_6d3298c0-7219-4c90-a373-8ad9e276cba3_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel3Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant Unobservable Inputs (Level&#160;3)</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel3Member_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel3Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value, Inputs, Level 3 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel3Member" xlink:to="lab_us-gaap_FairValueInputsLevel3Member" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_RightsToFutureTechnologicalImprovementsMember_a82a2440-f856-43e8-a3db-18e99077d2bf_terseLabel_en-US" xlink:label="lab_mrsn_RightsToFutureTechnologicalImprovementsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rights to Future Technological Improvements</link:label>
    <link:label id="lab_mrsn_RightsToFutureTechnologicalImprovementsMember_label_en-US" xlink:label="lab_mrsn_RightsToFutureTechnologicalImprovementsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rights To Future Technological Improvements [Member]</link:label>
    <link:label id="lab_mrsn_RightsToFutureTechnologicalImprovementsMember_documentation_en-US" xlink:label="lab_mrsn_RightsToFutureTechnologicalImprovementsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Represents rights to future technological improvements.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_RightsToFutureTechnologicalImprovementsMember" xlink:href="mrsn-20220930.xsd#mrsn_RightsToFutureTechnologicalImprovementsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_RightsToFutureTechnologicalImprovementsMember" xlink:to="lab_mrsn_RightsToFutureTechnologicalImprovementsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ConsolidationPolicyTextBlock_c611eb0d-2cd7-4360-9cd7-9d90567c56b9_terseLabel_en-US" xlink:label="lab_us-gaap_ConsolidationPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Principles of Consolidation</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsolidationPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConsolidationPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConsolidationPolicyTextBlock" xlink:to="lab_us-gaap_ConsolidationPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_2f3738ca-27b3-4743-aed5-765f46ef85c6_terseLabel_en-US" xlink:label="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock-based compensation</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:to="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock_09ab61dc-050e-42e5-89d3-ea9a8c443b28_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Stock-Based Compensation Expense by Award Type</link:label>
    <link:label id="lab_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-Based Payment Arrangement, Cost by Plan [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock" xlink:to="lab_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_MinimumMember_97141ec6-24d8-4201-bd27-86d60d5ec2ce_terseLabel_en-US" xlink:label="lab_srt_MinimumMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum</link:label>
    <link:label id="lab_srt_MinimumMember_label_en-US" xlink:label="lab_srt_MinimumMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MinimumMember" xlink:to="lab_srt_MinimumMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementOfFinancialPositionAbstract_f856f34b-05ad-4620-9eeb-78d868dcfeb4_terseLabel_en-US" xlink:label="lab_us-gaap_StatementOfFinancialPositionAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of Financial Position [Abstract]</link:label>
    <link:label id="lab_us-gaap_StatementOfFinancialPositionAbstract_label_en-US" xlink:label="lab_us-gaap_StatementOfFinancialPositionAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of Financial Position [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementOfFinancialPositionAbstract"/>
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    <link:label id="lab_dei_EntityEmergingGrowthCompany_e3a125b9-4dd7-4eab-88dc-00aab2967ab1_terseLabel_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Emerging Growth Company</link:label>
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    <link:label id="lab_us-gaap_CreditFacilityDomain_4e2ea5f8-8c3f-4f6f-9b2c-f8df08e1407e_terseLabel_en-US" xlink:label="lab_us-gaap_CreditFacilityDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit Facility [Domain]</link:label>
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    <link:label id="lab_mrsn_CollaborationArrangementPotentialOptionExerciseReceivable_977cc95b-aed9-46e5-a5f8-ab41c885a86f_terseLabel_en-US" xlink:label="lab_mrsn_CollaborationArrangementPotentialOptionExerciseReceivable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Collaboration arrangement, potential option exercise receivable</link:label>
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    <link:label id="lab_mrsn_CollaborationArrangementPotentialOptionExerciseReceivable_documentation_en-US" xlink:label="lab_mrsn_CollaborationArrangementPotentialOptionExerciseReceivable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">The amount the company is eligible to receive upon an option exercise as part of a collaboration arrangement.</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_CollaborationArrangementPotentialOptionExerciseReceivable" xlink:to="lab_mrsn_CollaborationArrangementPotentialOptionExerciseReceivable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_17d421dc-ceaa-4334-a2e0-9c58e0fca6c8_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Restricted Stock Activity</link:label>
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    <link:label id="lab_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_19f9326a-b1e0-4a12-8545-e219b51626eb_terseLabel_en-US" xlink:label="lab_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Warrant exercise price per share (in dollars per share)</link:label>
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    <link:label id="lab_us-gaap_InterestPaidNet_ae1a14f2-cb94-4b69-a661-145dde640247_terseLabel_en-US" xlink:label="lab_us-gaap_InterestPaidNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash paid for interest</link:label>
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    <link:label id="lab_mrsn_CollaborationArrangementsTargetsDesignatedPerformanceObligationsSatisfiedNumber_b9bfe26c-892a-4622-aaa1-6ae49460a990_terseLabel_en-US" xlink:label="lab_mrsn_CollaborationArrangementsTargetsDesignatedPerformanceObligationsSatisfiedNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of targets with satisfied performance obligations</link:label>
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    <link:label id="lab_us-gaap_EarningsPerShareBasic_7db553ec-389c-439e-8e52-149d9351a7cd_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net loss per share attributable to common stockholders &#8212; basic (in dollars per share)</link:label>
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    <link:label id="lab_us-gaap_RevenueRemainingPerformanceObligation_fdfe6009-fd61-4377-8c8f-9974e730b622_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueRemainingPerformanceObligation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Remaining performance obligation</link:label>
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    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_b5899a1f-29c9-4ece-82ef-f25cd260e132_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expiration period</link:label>
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    <link:label id="lab_us-gaap_NonoperatingIncomeExpenseAbstract_a2fd6671-fd10-444e-b11c-2d2d967707cb_terseLabel_en-US" xlink:label="lab_us-gaap_NonoperatingIncomeExpenseAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other income (expense):</link:label>
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    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_8a47a5e8-4c7d-4af0-9edc-0a045b371036_terseLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amortized Cost</link:label>
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, after Allowance for Credit Loss</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss" xlink:to="lab_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_LicenseAgreementMilestonePaymentsMember_d2a2b251-b824-443c-918d-cd6623da5a61_terseLabel_en-US" xlink:label="lab_mrsn_LicenseAgreementMilestonePaymentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">License Agreement, Milestone Payments</link:label>
    <link:label id="lab_mrsn_LicenseAgreementMilestonePaymentsMember_label_en-US" xlink:label="lab_mrsn_LicenseAgreementMilestonePaymentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">License Agreement, Milestone Payments [Member]</link:label>
    <link:label id="lab_mrsn_LicenseAgreementMilestonePaymentsMember_documentation_en-US" xlink:label="lab_mrsn_LicenseAgreementMilestonePaymentsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">License Agreement, Milestone Payments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_LicenseAgreementMilestonePaymentsMember" xlink:href="mrsn-20220930.xsd#mrsn_LicenseAgreementMilestonePaymentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_LicenseAgreementMilestonePaymentsMember" xlink:to="lab_mrsn_LicenseAgreementMilestonePaymentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressAddressLine1_ba718e43-dcbc-41aa-b0cd-ab2643edd31d_terseLabel_en-US" xlink:label="lab_dei_EntityAddressAddressLine1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line One</link:label>
    <link:label id="lab_dei_EntityAddressAddressLine1_label_en-US" xlink:label="lab_dei_EntityAddressAddressLine1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressAddressLine1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressAddressLine1" xlink:to="lab_dei_EntityAddressAddressLine1" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_CollaborationArrangementsTargetsDesignatedNumber_3c58eafa-4c73-49da-aadd-71ff2aeda5e0_terseLabel_en-US" xlink:label="lab_mrsn_CollaborationArrangementsTargetsDesignatedNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of targets designated</link:label>
    <link:label id="lab_mrsn_CollaborationArrangementsTargetsDesignatedNumber_label_en-US" xlink:label="lab_mrsn_CollaborationArrangementsTargetsDesignatedNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Collaboration Arrangements, Targets Designated, Number</link:label>
    <link:label id="lab_mrsn_CollaborationArrangementsTargetsDesignatedNumber_documentation_en-US" xlink:label="lab_mrsn_CollaborationArrangementsTargetsDesignatedNumber" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of targets designated as of balance sheet date.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_CollaborationArrangementsTargetsDesignatedNumber" xlink:href="mrsn-20220930.xsd#mrsn_CollaborationArrangementsTargetsDesignatedNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_CollaborationArrangementsTargetsDesignatedNumber" xlink:to="lab_mrsn_CollaborationArrangementsTargetsDesignatedNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_CollaborationArrangementsMaximumAggregateMilestones_5c9ed475-8319-4e6d-9ed8-c239f6ae1382_terseLabel_en-US" xlink:label="lab_mrsn_CollaborationArrangementsMaximumAggregateMilestones" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Collaboration arrangements, maximum aggregate milestones</link:label>
    <link:label id="lab_mrsn_CollaborationArrangementsMaximumAggregateMilestones_label_en-US" xlink:label="lab_mrsn_CollaborationArrangementsMaximumAggregateMilestones" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Collaboration Arrangements, Maximum Aggregate Milestones</link:label>
    <link:label id="lab_mrsn_CollaborationArrangementsMaximumAggregateMilestones_documentation_en-US" xlink:label="lab_mrsn_CollaborationArrangementsMaximumAggregateMilestones" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Maximum aggregate milestone the Company is entitled to receive under terms of the agreement.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_CollaborationArrangementsMaximumAggregateMilestones" xlink:href="mrsn-20220930.xsd#mrsn_CollaborationArrangementsMaximumAggregateMilestones"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_CollaborationArrangementsMaximumAggregateMilestones" xlink:to="lab_mrsn_CollaborationArrangementsMaximumAggregateMilestones" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock_297b7449-cfea-4ed8-8ae9-dbcb441c5515_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Restricted Cash</link:label>
    <link:label id="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restrictions on Cash and Cash Equivalents [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:to="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_CollaborationArrangementsDevelopmentMilestonesPaymentReceivableNextMilestone_bb2dc767-baf0-4e00-acff-c97e57a0f624_terseLabel_en-US" xlink:label="lab_mrsn_CollaborationArrangementsDevelopmentMilestonesPaymentReceivableNextMilestone" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Next potential development milestone payment eligible to receive</link:label>
    <link:label id="lab_mrsn_CollaborationArrangementsDevelopmentMilestonesPaymentReceivableNextMilestone_label_en-US" xlink:label="lab_mrsn_CollaborationArrangementsDevelopmentMilestonesPaymentReceivableNextMilestone" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Collaboration Arrangements, Development Milestones Payment Receivable, Next Milestone</link:label>
    <link:label id="lab_mrsn_CollaborationArrangementsDevelopmentMilestonesPaymentReceivableNextMilestone_documentation_en-US" xlink:label="lab_mrsn_CollaborationArrangementsDevelopmentMilestonesPaymentReceivableNextMilestone" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Amount of the next potential development milestone the company will be eligible to receive.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_CollaborationArrangementsDevelopmentMilestonesPaymentReceivableNextMilestone" xlink:href="mrsn-20220930.xsd#mrsn_CollaborationArrangementsDevelopmentMilestonesPaymentReceivableNextMilestone"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_CollaborationArrangementsDevelopmentMilestonesPaymentReceivableNextMilestone" xlink:to="lab_mrsn_CollaborationArrangementsDevelopmentMilestonesPaymentReceivableNextMilestone" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ContractWithCustomerLiability_1da7955f-7ad3-4604-ad9d-678072791f8e_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiability" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred revenue</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerLiability_1d06511e-2a12-4197-9667-bbd482495df0_periodStartLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiability" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance at Beginning of Period</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerLiability_45371772-cf18-456e-b688-ff113b64a648_periodEndLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiability" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance at End of Period</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerLiability_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract with Customer, Liability</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerLiability" xlink:to="lab_us-gaap_ContractWithCustomerLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockholdersEquity_7d3ddbe9-8940-4cf9-b07f-afa69256dfc9_totalLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total stockholders&#8217; equity</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_436fe6c3-eccc-420a-8f4f-5f2e9d7407de_periodStartLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance at beginning of period</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_459ab75a-cbb0-4310-8ed8-06f1a8e1bb34_periodEndLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance at end of period</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_label_en-US" xlink:label="lab_us-gaap_StockholdersEquity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stockholders' Equity Attributable to Parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquity" xlink:to="lab_us-gaap_StockholdersEquity" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ProductOrServiceAxis_0f8b5189-554b-4026-9eb6-6e229ed08370_terseLabel_en-US" xlink:label="lab_srt_ProductOrServiceAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Product and Service [Axis]</link:label>
    <link:label id="lab_srt_ProductOrServiceAxis_label_en-US" xlink:label="lab_srt_ProductOrServiceAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Product and Service [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductOrServiceAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ProductOrServiceAxis" xlink:to="lab_srt_ProductOrServiceAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability_a5ab9615-a06f-44d5-8f32-e234fe35f945_terseLabel_en-US" xlink:label="lab_us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Right-of-use assets obtained in exchange for financing lease liabilities</link:label>
    <link:label id="lab_us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability_label_en-US" xlink:label="lab_us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Right-of-Use Asset Obtained in Exchange for Finance Lease Liability</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability" xlink:to="lab_us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueDisclosuresAbstract_2bf3c5cd-691d-453a-a773-2e079e57f15c_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value Disclosures [Abstract]</link:label>
    <link:label id="lab_us-gaap_FairValueDisclosuresAbstract_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value Disclosures [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueDisclosuresAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract" xlink:to="lab_us-gaap_FairValueDisclosuresAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestExpense_0e738450-4eff-4d46-b745-4d8b798cf20b_negatedLabel_en-US" xlink:label="lab_us-gaap_InterestExpense" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest expense</link:label>
    <link:label id="lab_us-gaap_InterestExpense_label_en-US" xlink:label="lab_us-gaap_InterestExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpense" xlink:to="lab_us-gaap_InterestExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityInteractiveDataCurrent_4e0cb649-7f67-4a4b-8eba-fcbc7ae32903_terseLabel_en-US" xlink:label="lab_dei_EntityInteractiveDataCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Interactive Data Current</link:label>
    <link:label id="lab_dei_EntityInteractiveDataCurrent_label_en-US" xlink:label="lab_dei_EntityInteractiveDataCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Interactive Data Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityInteractiveDataCurrent" xlink:to="lab_dei_EntityInteractiveDataCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CreditFacilityAxis_09521878-3a1a-4b3b-bc41-e05d47260162_terseLabel_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit Facility [Axis]</link:label>
    <link:label id="lab_us-gaap_CreditFacilityAxis_label_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Credit Facility [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CreditFacilityAxis" xlink:to="lab_us-gaap_CreditFacilityAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_AccruedManufacturingExpensesCurrent_6965b8c9-555e-426b-afaa-9410490291f2_terseLabel_en-US" xlink:label="lab_mrsn_AccruedManufacturingExpensesCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued manufacturing expenses</link:label>
    <link:label id="lab_mrsn_AccruedManufacturingExpensesCurrent_label_en-US" xlink:label="lab_mrsn_AccruedManufacturingExpensesCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued Manufacturing Expenses Current</link:label>
    <link:label id="lab_mrsn_AccruedManufacturingExpensesCurrent_documentation_en-US" xlink:label="lab_mrsn_AccruedManufacturingExpensesCurrent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Carrying value as of the balance sheet date of obligations incurred through that date and payable for manufacturing expense. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_AccruedManufacturingExpensesCurrent" xlink:href="mrsn-20220930.xsd#mrsn_AccruedManufacturingExpensesCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_AccruedManufacturingExpensesCurrent" xlink:to="lab_mrsn_AccruedManufacturingExpensesCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_c0ce14d4-e200-4aca-97fd-b4c81820a2cd_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Changes in operating assets and liabilities:</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Operating Capital [Abstract]</link:label>
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    <link:label id="lab_mrsn_CollaborationAgreementsAbstract_documentation_en-US" xlink:label="lab_mrsn_CollaborationAgreementsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">No definition available.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_CollaborationAgreementsAbstract" xlink:href="mrsn-20220930.xsd#mrsn_CollaborationAgreementsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_CollaborationAgreementsAbstract" xlink:to="lab_mrsn_CollaborationAgreementsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock_e3aca862-917a-4291-8ddd-510f400a6b24_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segment Information</link:label>
    <link:label id="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segment Reporting, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentReportingPolicyPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:to="lab_us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_AtMarketEquityOfferingProgram2022ATMMember_b27d76a0-96aa-4a38-90ae-36e31b0896c5_terseLabel_en-US" xlink:label="lab_mrsn_AtMarketEquityOfferingProgram2022ATMMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2022 ATM</link:label>
    <link:label id="lab_mrsn_AtMarketEquityOfferingProgram2022ATMMember_label_en-US" xlink:label="lab_mrsn_AtMarketEquityOfferingProgram2022ATMMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">At Market Equity Offering Program (2022 ATM) [Member]</link:label>
    <link:label id="lab_mrsn_AtMarketEquityOfferingProgram2022ATMMember_documentation_en-US" xlink:label="lab_mrsn_AtMarketEquityOfferingProgram2022ATMMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">At Market Equity Offering Program (2022 ATM)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_AtMarketEquityOfferingProgram2022ATMMember" xlink:href="mrsn-20220930.xsd#mrsn_AtMarketEquityOfferingProgram2022ATMMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_AtMarketEquityOfferingProgram2022ATMMember" xlink:to="lab_mrsn_AtMarketEquityOfferingProgram2022ATMMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ConcentrationRiskCreditRisk_7f1b7fa9-9791-46b1-9841-82e38df96323_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskCreditRisk" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Concentration Risk, Credit Risk, Policy</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskCreditRisk_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskCreditRisk" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Concentration Risk, Credit Risk, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskCreditRisk" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConcentrationRiskCreditRisk"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskCreditRisk" xlink:to="lab_us-gaap_ConcentrationRiskCreditRisk" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_6f1418d2-a569-4ee5-b948-f2a4008cd914_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cancelled (in dollars per share)</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherAccruedLiabilitiesCurrent_081933de-fd81-437f-a3f4-dcb3bc0ed98d_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAccruedLiabilitiesCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued other</link:label>
    <link:label id="lab_us-gaap_OtherAccruedLiabilitiesCurrent_label_en-US" xlink:label="lab_us-gaap_OtherAccruedLiabilitiesCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Accrued Liabilities, Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAccruedLiabilitiesCurrent" xlink:to="lab_us-gaap_OtherAccruedLiabilitiesCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentFiscalYearFocus_3d532eeb-7972-4456-8e35-37707b0888e2_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Fiscal Year Focus</link:label>
    <link:label id="lab_dei_DocumentFiscalYearFocus_label_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Fiscal Year Focus</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentFiscalYearFocus"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentFiscalYearFocus" xlink:to="lab_dei_DocumentFiscalYearFocus" xlink:type="arc" order="1"/>
    <link:label id="lab_mrsn_InducementAwardProgramMember_8cc86c7c-05b5-4e34-bdb8-b06c2347aa2f_terseLabel_en-US" xlink:label="lab_mrsn_InducementAwardProgramMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inducement award program</link:label>
    <link:label id="lab_mrsn_InducementAwardProgramMember_label_en-US" xlink:label="lab_mrsn_InducementAwardProgramMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inducement Award Program [Member]</link:label>
    <link:label id="lab_mrsn_InducementAwardProgramMember_documentation_en-US" xlink:label="lab_mrsn_InducementAwardProgramMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inducement Award Program</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mrsn_InducementAwardProgramMember" xlink:href="mrsn-20220930.xsd#mrsn_InducementAwardProgramMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mrsn_InducementAwardProgramMember" xlink:to="lab_mrsn_InducementAwardProgramMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_103f82e4-07bd-416f-b15b-3e816a372be0_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from operating activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_CityAreaCode_43a2fdc3-b714-4ae0-ab5c-cea4e578883f_terseLabel_en-US" xlink:label="lab_dei_CityAreaCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">City Area Code</link:label>
    <link:label id="lab_dei_CityAreaCode_label_en-US" xlink:label="lab_dei_CityAreaCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">City Area Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_CityAreaCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CityAreaCode" xlink:to="lab_dei_CityAreaCode" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccruedProfessionalFeesCurrent_3869ddb9-dde0-48d1-be38-3b00b860fc41_terseLabel_en-US" xlink:label="lab_us-gaap_AccruedProfessionalFeesCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued professional fees</link:label>
    <link:label id="lab_us-gaap_AccruedProfessionalFeesCurrent_label_en-US" xlink:label="lab_us-gaap_AccruedProfessionalFeesCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued Professional Fees, Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedProfessionalFeesCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccruedProfessionalFeesCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccruedProfessionalFeesCurrent" xlink:to="lab_us-gaap_AccruedProfessionalFeesCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementLineItems_f92b8b61-9433-4d85-af40-b6c8fc244044_terseLabel_en-US" xlink:label="lab_us-gaap_StatementLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement [Line Items]</link:label>
    <link:label id="lab_us-gaap_StatementLineItems_label_en-US" xlink:label="lab_us-gaap_StatementLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementLineItems" xlink:to="lab_us-gaap_StatementLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_GeneralAndAdministrativeExpense_8a830b6d-8c57-4a36-9b87-e96d69f5057b_terseLabel_en-US" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">General and administrative</link:label>
    <link:label id="lab_us-gaap_GeneralAndAdministrativeExpense_label_en-US" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">General and Administrative Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GeneralAndAdministrativeExpense" xlink:to="lab_us-gaap_GeneralAndAdministrativeExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AssetsAbstract_e399049e-e456-4762-90b3-b0597f69b62b_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets</link:label>
    <link:label id="lab_us-gaap_AssetsAbstract_label_en-US" xlink:label="lab_us-gaap_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="lab_us-gaap_AssetsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FinanceLeasePrincipalPayments_34143da1-1f5b-4bec-9843-b74419cc1389_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_FinanceLeasePrincipalPayments" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments under finance lease obligations</link:label>
    <link:label id="lab_us-gaap_FinanceLeasePrincipalPayments_label_en-US" xlink:label="lab_us-gaap_FinanceLeasePrincipalPayments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance Lease, Principal Payments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeasePrincipalPayments" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeasePrincipalPayments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinanceLeasePrincipalPayments" xlink:to="lab_us-gaap_FinanceLeasePrincipalPayments" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_5bb09f0c-aff1-43b2-b4f0-33dd32f260db_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Awards outstanding (in shares)</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherCommitmentsLineItems_09c72f6f-0156-4f6e-a9c6-cd8d1d0400b2_terseLabel_en-US" xlink:label="lab_us-gaap_OtherCommitmentsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitments</link:label>
    <link:label id="lab_us-gaap_OtherCommitmentsLineItems_label_en-US" xlink:label="lab_us-gaap_OtherCommitmentsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Commitments [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherCommitmentsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherCommitmentsLineItems" xlink:to="lab_us-gaap_OtherCommitmentsLineItems" xlink:type="arc" order="1"/>
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    <link:label id="lab_mrsn_CommercialMember_74c77ea0-3057-4ad1-bd2f-2e2e968202e0_terseLabel_en-US" xlink:label="lab_mrsn_CommercialMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commercial</link:label>
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    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_a72e742b-ab61-45d7-8772-f1e3ded8661d_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of property and equipment</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromCollaborators_959c6de9-48d8-469d-a3c4-ba95dfee5b81_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromCollaborators" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from collaborators</link:label>
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<TYPE>EX-101.PRE
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<FILENAME>mrsn-20220930_pre.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
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<TEXT>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031640687696">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Cover Page - shares<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
<th class="th" colspan="1"></th>
</tr>
<tr>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Nov. 03, 2022</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CoverAbstract', window );"><strong>Cover [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentType', window );">Document Type</a></td>
<td class="text">10-Q<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentQuarterlyReport', window );">Document Quarterly Report</a></td>
<td class="text">true<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentPeriodEndDate', window );">Document Period End Date</a></td>
<td class="text">Sep. 30,  2022<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentTransitionReport', window );">Document Transition Report</a></td>
<td class="text">false<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityFileNumber', window );">Entity File Number</a></td>
<td class="text">001-38129<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityRegistrantName', window );">Entity Registrant Name</a></td>
<td class="text">Mersana Therapeutics,&#160;Inc.<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityIncorporationStateCountryCode', window );">Entity Incorporation, State or Country Code</a></td>
<td class="text">DE<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityTaxIdentificationNumber', window );">Entity Tax Identification Number</a></td>
<td class="text">04-3562403<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressAddressLine1', window );">Entity Address, Address Line One</a></td>
<td class="text">840 Memorial Drive<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressCityOrTown', window );">Entity Address, City or Town</a></td>
<td class="text">Cambridge<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressStateOrProvince', window );">Entity Address, State or Province</a></td>
<td class="text">MA<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressPostalZipCode', window );">Entity Address, Postal Zip Code</a></td>
<td class="text">02139<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CityAreaCode', window );">City Area Code</a></td>
<td class="text">617<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_LocalPhoneNumber', window );">Local Phone Number</a></td>
<td class="text">498-0020<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">Common Stock, $0.0001 par value<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">MRSN<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NASDAQ<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityCurrentReportingStatus', window );">Entity Current Reporting Status</a></td>
<td class="text">Yes<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityInteractiveDataCurrent', window );">Entity Interactive Data Current</a></td>
<td class="text">Yes<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityFilerCategory', window );">Entity Filer Category</a></td>
<td class="text">Large Accelerated Filer<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntitySmallBusiness', window );">Entity Small Business</a></td>
<td class="text">false<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityEmergingGrowthCompany', window );">Entity Emerging Growth Company</a></td>
<td class="text">false<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityShellCompany', window );">Entity Shell Company</a></td>
<td class="text">false<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityCommonStockSharesOutstanding', window );">Entity Common Stock, Shares Outstanding</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">99,773,857<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityCentralIndexKey', window );">Entity Central Index Key</a></td>
<td class="text">0001442836<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CurrentFiscalYearEndDate', window );">Current Fiscal Year End Date</a></td>
<td class="text">--12-31<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentFiscalYearFocus', window );">Document Fiscal Year Focus</a></td>
<td class="text">2022<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentFiscalPeriodFocus', window );">Document Fiscal Period Focus</a></td>
<td class="text">Q3<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_AmendmentFlag', window );">Amendment Flag</a></td>
<td class="text">false<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_AmendmentFlag">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_AmendmentFlag</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CityAreaCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Area code of city</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CityAreaCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CoverAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Cover page.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CoverAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CurrentFiscalYearEndDate">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>End date of current fiscal year in the format --MM-DD.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CurrentFiscalYearEndDate</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:gMonthDayItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentFiscalPeriodFocus">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Fiscal period values are FY, Q1, Q2, and Q3.  1st, 2nd and 3rd quarter 10-Q or 10-QT statements have value Q1, Q2, and Q3 respectively, with 10-K, 10-KT or other fiscal year statements having FY.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentFiscalPeriodFocus</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:fiscalPeriodItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentFiscalYearFocus">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>This is focus fiscal year of the document report in YYYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentFiscalYearFocus</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:gYearItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentPeriodEndDate">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period.  The format of the date is YYYY-MM-DD.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentPeriodEndDate</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:dateItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentQuarterlyReport">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true only for a form used as an quarterly report.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Form 10-Q<br> -Number 240<br> -Section 308<br> -Subsection a<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentQuarterlyReport</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentTransitionReport">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true only for a form used as a transition report.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Forms 10-K, 10-Q, 20-F<br> -Number 240<br> -Section 13<br> -Subsection a-1<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentTransitionReport</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentType">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentType</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:submissionTypeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressAddressLine1">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Address Line 1 such as Attn, Building Name, Street Name</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressAddressLine1</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressCityOrTown">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the City or Town</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressCityOrTown</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressPostalZipCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Code for the postal or zip code</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressPostalZipCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressStateOrProvince">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the state or province.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressStateOrProvince</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:stateOrProvinceItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityCentralIndexKey">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCentralIndexKey</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:centralIndexKeyItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityCommonStockSharesOutstanding">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCommonStockSharesOutstanding</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityCurrentReportingStatus">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Indicate 'Yes' or 'No' whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. This information should be based on the registrant's current or most recent filing containing the related disclosure.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCurrentReportingStatus</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:yesNoItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityEmergingGrowthCompany">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Indicate if registrant meets the emerging growth company criteria.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityEmergingGrowthCompany</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityFileNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityFileNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:fileNumberItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityFilerCategory">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Indicate whether the registrant is one of the following: Large Accelerated Filer, Accelerated Filer, Non-accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityFilerCategory</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:filerCategoryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityIncorporationStateCountryCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Two-character EDGAR code representing the state or country of incorporation.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityIncorporationStateCountryCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarStateCountryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityInteractiveDataCurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Regulation S-T<br> -Number 232<br> -Section 405<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityInteractiveDataCurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:yesNoItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityRegistrantName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityRegistrantName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityShellCompany">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the registrant is a shell company as defined in Rule 12b-2 of the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityShellCompany</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntitySmallBusiness">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Indicates that the company is a Smaller Reporting Company (SRC).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntitySmallBusiness</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityTaxIdentificationNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityTaxIdentificationNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:employerIdItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_LocalPhoneNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Local phone number for entity.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_LocalPhoneNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_Security12bTitle">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Title of a 12(b) registered security.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_Security12bTitle</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:securityTitleItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SecurityExchangeName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the Exchange on which a security is registered.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection d1-1<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SecurityExchangeName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:edgarExchangeCodeItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_TradingSymbol">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Trading symbol of an instrument as listed on an exchange.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_TradingSymbol</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:tradingSymbolItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
</div>
</body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>12
<FILENAME>R2.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
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<title></title>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031640053744">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Condensed Consolidated Balance Sheets - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Dec. 31, 2021</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AssetsCurrentAbstract', window );"><strong>Current assets:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CashAndCashEquivalentsAtCarryingValue', window );">Cash and cash equivalents</a></td>
<td class="nump">$ 184,082<span></span>
</td>
<td class="nump">$ 177,947<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest', window );">Short-term marketable securities</a></td>
<td class="nump">106,044<span></span>
</td>
<td class="nump">0<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_PrepaidExpenseAndOtherAssetsCurrent', window );">Prepaid expenses and other current assets</a></td>
<td class="nump">9,911<span></span>
</td>
<td class="nump">10,951<span></span>
</td>
</tr>
<tr class="reu">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AssetsCurrent', window );">Total current assets</a></td>
<td class="nump">300,037<span></span>
</td>
<td class="nump">188,898<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization', window );">Property and equipment, net</a></td>
<td class="nump">3,136<span></span>
</td>
<td class="nump">1,968<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_OperatingLeaseRightOfUseAsset', window );">Operating lease right-of-use assets</a></td>
<td class="nump">11,061<span></span>
</td>
<td class="nump">12,889<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_OtherAssetsNoncurrent', window );">Other assets, noncurrent</a></td>
<td class="nump">616<span></span>
</td>
<td class="nump">2,356<span></span>
</td>
</tr>
<tr class="reu">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_Assets', window );">Total assets</a></td>
<td class="nump">314,850<span></span>
</td>
<td class="nump">206,111<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_LiabilitiesCurrentAbstract', window );"><strong>Current liabilities:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AccountsPayableCurrent', window );">Accounts payable</a></td>
<td class="nump">13,732<span></span>
</td>
<td class="nump">12,321<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AccruedLiabilitiesCurrent', window );">Accrued expenses</a></td>
<td class="nump">41,204<span></span>
</td>
<td class="nump">28,716<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerLiabilityCurrent', window );">Deferred revenue</a></td>
<td class="nump">30,924<span></span>
</td>
<td class="nump">3,944<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_OperatingLeaseLiabilityCurrent', window );">Operating lease liabilities</a></td>
<td class="nump">2,697<span></span>
</td>
<td class="nump">2,303<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_OtherLiabilitiesCurrent', window );">Other current liabilities</a></td>
<td class="nump">237<span></span>
</td>
<td class="nump">239<span></span>
</td>
</tr>
<tr class="rou">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_LiabilitiesCurrent', window );">Total current liabilities</a></td>
<td class="nump">88,794<span></span>
</td>
<td class="nump">47,523<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_OperatingLeaseLiabilityNoncurrent', window );">Operating lease liabilities, noncurrent</a></td>
<td class="nump">9,291<span></span>
</td>
<td class="nump">11,247<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_LongTermDebt', window );">Long-term debt, net</a></td>
<td class="nump">24,853<span></span>
</td>
<td class="nump">24,626<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerLiabilityNoncurrent', window );">Deferred revenue, noncurrent</a></td>
<td class="nump">101,417<span></span>
</td>
<td class="nump">0<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_OtherLiabilitiesNoncurrent', window );">Other liabilities, noncurrent</a></td>
<td class="nump">266<span></span>
</td>
<td class="nump">974<span></span>
</td>
</tr>
<tr class="reu">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_Liabilities', window );">Total liabilities</a></td>
<td class="nump">224,621<span></span>
</td>
<td class="nump">84,370<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CommitmentsAndContingencies', window );">Commitments (Note 11)</a></td>
<td class="text"> <span></span>
</td>
<td class="text"> <span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockholdersEquityAbstract', window );"><strong>Stockholders' equity:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_PreferredStockValue', window );">Preferred stock, $0.0001 par value; 25,000,000 shares authorized; 0 shares issued and outstanding at September&#160;30, 2022 and December&#160;31, 2021, respectively</a></td>
<td class="nump">0<span></span>
</td>
<td class="nump">0<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CommonStockValue', window );">Common stock, $0.0001 par value; 350,000,000 and 175,000,000 shares authorized at September&#160;30, 2022 and December&#160;31, 2021, respectively ; 98,582,583 and 73,709,056&#160;shares issued and outstanding at September&#160;30, 2022 and December&#160;31, 2021, respectively</a></td>
<td class="nump">10<span></span>
</td>
<td class="nump">7<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AdditionalPaidInCapitalCommonStock', window );">Additional paid-in capital</a></td>
<td class="nump">700,217<span></span>
</td>
<td class="nump">572,213<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax', window );">Accumulated other comprehensive (loss) income</a></td>
<td class="num">(231)<span></span>
</td>
<td class="nump">0<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_RetainedEarningsAccumulatedDeficit', window );">Accumulated deficit</a></td>
<td class="num">(609,767)<span></span>
</td>
<td class="num">(450,479)<span></span>
</td>
</tr>
<tr class="reu">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockholdersEquity', window );">Total stockholders&#8217; equity</a></td>
<td class="nump">90,229<span></span>
</td>
<td class="nump">121,741<span></span>
</td>
</tr>
<tr class="rou">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_LiabilitiesAndStockholdersEquity', window );">Total liabilities and stockholders&#8217; equity</a></td>
<td class="nump">$ 314,850<span></span>
</td>
<td class="nump">$ 206,111<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AccountsPayableCurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.19(a))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 2: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 852<br> -SubTopic 10<br> -Section 55<br> -Paragraph 10<br> -URI https://asc.fasb.org/extlink&amp;oid=84165509&amp;loc=d3e56426-112766<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AccountsPayableCurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
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<tr>
<td><strong> Period Type:</strong></td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.20)<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<tr>
<td><strong> Data Type:</strong></td>
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</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(30)(a)(4))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section 45<br> -Paragraph 11<br> -URI https://asc.fasb.org/extlink&amp;oid=126968391&amp;loc=d3e637-108580<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.7-03(a)(23)(a)(3))<br> -URI https://asc.fasb.org/extlink&amp;oid=126734703&amp;loc=d3e572229-122910<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section 45<br> -Paragraph 14A<br> -URI https://asc.fasb.org/extlink&amp;oid=126968391&amp;loc=SL7669686-108580<br><br>Reference 5: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 40<br> -Section 65<br> -Paragraph 2<br> -Subparagraph (h)(2)<br> -URI https://asc.fasb.org/extlink&amp;oid=124501264&amp;loc=SL117420844-207641<br><br>Reference 6: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 40<br> -Section 65<br> -Paragraph 2<br> -Subparagraph (g)(2)(ii)<br> -URI https://asc.fasb.org/extlink&amp;oid=124501264&amp;loc=SL117420844-207641<br><br>Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section 45<br> -Paragraph 14<br> -URI https://asc.fasb.org/extlink&amp;oid=126968391&amp;loc=d3e681-108580<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AdditionalPaidInCapitalCommonStock">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(30)(a)(1))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AdditionalPaidInCapitalCommonStock</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
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<tr>
<td><strong> Period Type:</strong></td>
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</tr>
</table></div>
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</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_Assets">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.</p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_Assets</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AssetsCurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=124098289&amp;loc=d3e6676-107765<br><br>Reference 2: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 852<br> -SubTopic 10<br> -Section 55<br> -Paragraph 10<br> -URI https://asc.fasb.org/extlink&amp;oid=84165509&amp;loc=d3e56426-112766<br><br>Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 852<br> -SubTopic 10<br> -Section 50<br> -Paragraph 7<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=124433192&amp;loc=SL2890621-112765<br><br>Reference 4: 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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AssetsCurrent</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td>xbrli:monetaryItemType</td>
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<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
<td>instant</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AssetsCurrentAbstract">
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<td><strong> Balance Type:</strong></td>
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<tr>
<td><strong> Period Type:</strong></td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 4<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3044-108585<br><br>Reference 2: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=124098289&amp;loc=d3e6676-107765<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(1))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CashAndCashEquivalentsAtCarryingValue</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.25)<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.7-03.(a),19)<br> -URI https://asc.fasb.org/extlink&amp;oid=126734703&amp;loc=d3e572229-122910<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-03.17)<br> -URI https://asc.fasb.org/extlink&amp;oid=126897435&amp;loc=d3e534808-122878<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CommitmentsAndContingencies</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CommonStockValue">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 852<br> -SubTopic 10<br> -Section 55<br> -Paragraph 10<br> -URI https://asc.fasb.org/extlink&amp;oid=84165509&amp;loc=d3e56426-112766<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CommonStockValue</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ContractWithCustomerLiabilityCurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=126919976&amp;loc=SL49130531-203044<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 45<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=126919976&amp;loc=SL49130532-203044<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 50<br> -Paragraph 8<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126920106&amp;loc=SL49130549-203045<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ContractWithCustomerLiabilityCurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ContractWithCustomerLiabilityNoncurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as noncurrent.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 45<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=126919976&amp;loc=SL49130532-203044<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=126919976&amp;loc=SL49130531-203044<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 50<br> -Paragraph 8<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126920106&amp;loc=SL49130549-203045<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ContractWithCustomerLiabilityNoncurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 326<br> -SubTopic 30<br> -Section 45<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=124258926&amp;loc=SL82898722-210454<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_Liabilities">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.19-26)<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 852<br> -SubTopic 10<br> -Section 50<br> -Paragraph 7<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=124433192&amp;loc=SL2890621-112765<br><br>Reference 3: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 30<br> -Subparagraph (d)<br> -URI 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10<br> -Section 50<br> -Paragraph 3<br> -Subparagraph (c)<br> -URI https://asc.fasb.org/extlink&amp;oid=114001798&amp;loc=d3e33918-111571<br><br>Reference 14: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1A<br> -Subparagraph (SX 210.13-01(a)(5))<br> -URI https://asc.fasb.org/extlink&amp;oid=126975872&amp;loc=SL124442526-122756<br><br>Reference 15: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1A<br> -Subparagraph (SX 210.13-01(a)(4)(iii)(A))<br> -URI https://asc.fasb.org/extlink&amp;oid=126975872&amp;loc=SL124442526-122756<br><br>Reference 16: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1B<br> -Subparagraph (SX 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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_Liabilities</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LiabilitiesAndStockholdersEquity">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 323<br> -SubTopic 10<br> -Section 50<br> -Paragraph 3<br> -Subparagraph (c)<br> -URI https://asc.fasb.org/extlink&amp;oid=114001798&amp;loc=d3e33918-111571<br><br>Reference 2: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 852<br> -SubTopic 10<br> -Section 55<br> -Paragraph 10<br> -URI https://asc.fasb.org/extlink&amp;oid=84165509&amp;loc=d3e56426-112766<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-03(23))<br> -URI https://asc.fasb.org/extlink&amp;oid=126897435&amp;loc=d3e534808-122878<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.7-03(a)(25))<br> -URI https://asc.fasb.org/extlink&amp;oid=126734703&amp;loc=d3e572229-122910<br><br>Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 235<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.4-08(g)(1)(ii))<br> -URI https://asc.fasb.org/extlink&amp;oid=120395691&amp;loc=d3e23780-122690<br><br>Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(32))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 825<br> -SubTopic 10<br> -Section 50<br> -Paragraph 28<br> -Subparagraph (f)<br> -URI https://asc.fasb.org/extlink&amp;oid=123596393&amp;loc=d3e14064-108612<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_LiabilitiesAndStockholdersEquity</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LiabilitiesCurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 852<br> -SubTopic 10<br> -Section 55<br> -Paragraph 10<br> -URI https://asc.fasb.org/extlink&amp;oid=84165509&amp;loc=d3e56426-112766<br><br>Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 852<br> -SubTopic 10<br> -Section 50<br> -Paragraph 7<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=124433192&amp;loc=SL2890621-112765<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1B<br> -Subparagraph (SX 210.13-02(a)(4)(iii)(A))<br> -URI 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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_LiabilitiesCurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LiabilitiesCurrentAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_LiabilitiesCurrentAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LongTermDebt">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 20<br> -Section 50<br> -Paragraph 4<br> -Subparagraph (b)(3)<br> -URI https://asc.fasb.org/extlink&amp;oid=123466204&amp;loc=SL6031897-161870<br><br>Reference 2: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 20<br> -Section 55<br> -Paragraph 69C<br> -URI https://asc.fasb.org/extlink&amp;oid=123466577&amp;loc=SL123495737-112612<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.7-03(a)(16))<br> -URI https://asc.fasb.org/extlink&amp;oid=126734703&amp;loc=d3e572229-122910<br><br>Reference 4: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 20<br> -Section 55<br> -Paragraph 69B<br> -URI https://asc.fasb.org/extlink&amp;oid=123466577&amp;loc=SL123495735-112612<br><br>Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-03(16))<br> -URI https://asc.fasb.org/extlink&amp;oid=126897435&amp;loc=d3e534808-122878<br><br>Reference 6: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 20<br> -Section 50<br> -Paragraph 1D<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=123466505&amp;loc=SL123495340-112611<br><br>Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(22))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_LongTermDebt</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OperatingLeaseLiabilityCurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 842<br> -SubTopic 20<br> -Section 45<br> -Paragraph 1<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=123391704&amp;loc=SL77918627-209977<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_OperatingLeaseLiabilityCurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OperatingLeaseLiabilityNoncurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 842<br> -SubTopic 20<br> -Section 45<br> -Paragraph 1<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=123391704&amp;loc=SL77918627-209977<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_OperatingLeaseLiabilityNoncurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OperatingLeaseRightOfUseAsset">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of lessee's right to use underlying asset under operating lease.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 842<br> -SubTopic 20<br> -Section 45<br> -Paragraph 1<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=123391704&amp;loc=SL77918627-209977<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_OperatingLeaseRightOfUseAsset</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OtherAssetsNoncurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of noncurrent assets classified as other.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(17))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_OtherAssetsNoncurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OtherLiabilitiesCurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 852<br> -SubTopic 10<br> -Section 55<br> -Paragraph 10<br> -URI https://asc.fasb.org/extlink&amp;oid=84165509&amp;loc=d3e56426-112766<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.20)<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_OtherLiabilitiesCurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OtherLiabilitiesNoncurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.24)<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_OtherLiabilitiesNoncurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PreferredStockValue">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(28))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 2: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 852<br> -SubTopic 10<br> -Section 55<br> -Paragraph 10<br> -URI https://asc.fasb.org/extlink&amp;oid=84165509&amp;loc=d3e56426-112766<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PreferredStockValue</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PrepaidExpenseAndOtherAssetsCurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(9))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PrepaidExpenseAndOtherAssetsCurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount, after accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 360<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=6391035&amp;loc=d3e2868-110229<br><br>Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 842<br> -SubTopic 20<br> -Section 50<br> -Paragraph 4<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=128292326&amp;loc=SL77918686-209980<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_RetainedEarningsAccumulatedDeficit">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The cumulative amount of the reporting entity's undistributed earnings or deficit.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(30)(a)(3))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 2: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 852<br> -SubTopic 10<br> -Section 55<br> -Paragraph 10<br> -URI https://asc.fasb.org/extlink&amp;oid=84165509&amp;loc=d3e56426-112766<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.7-03(a)(23)(a)(4))<br> -URI https://asc.fasb.org/extlink&amp;oid=126734703&amp;loc=d3e572229-122910<br><br>Reference 4: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 40<br> -Section 65<br> -Paragraph 2<br> -Subparagraph (h)(2)<br> -URI https://asc.fasb.org/extlink&amp;oid=124501264&amp;loc=SL117420844-207641<br><br>Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.3-04)<br> -URI https://asc.fasb.org/extlink&amp;oid=120397183&amp;loc=d3e187085-122770<br><br>Reference 6: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 40<br> -Section 65<br> -Paragraph 2<br> -Subparagraph (g)(2)(i)<br> -URI https://asc.fasb.org/extlink&amp;oid=124501264&amp;loc=SL117420844-207641<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_RetainedEarningsAccumulatedDeficit</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockholdersEquity">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 235<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.4-08(g)(1)(ii))<br> -URI https://asc.fasb.org/extlink&amp;oid=120395691&amp;loc=d3e23780-122690<br><br>Reference 2: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 852<br> -SubTopic 10<br> -Section 55<br> -Paragraph 10<br> -URI https://asc.fasb.org/extlink&amp;oid=84165509&amp;loc=d3e56426-112766<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 310<br> -SubTopic 10<br> -Section S99<br> -Paragraph 2<br> -Subparagraph (SAB Topic 4.E)<br> -URI https://asc.fasb.org/extlink&amp;oid=122038336&amp;loc=d3e74512-122707<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(31))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(30))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 825<br> -SubTopic 10<br> -Section 50<br> -Paragraph 28<br> -Subparagraph (f)<br> -URI https://asc.fasb.org/extlink&amp;oid=123596393&amp;loc=d3e14064-108612<br><br>Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 323<br> -SubTopic 10<br> -Section 50<br> -Paragraph 3<br> -Subparagraph (c)<br> -URI https://asc.fasb.org/extlink&amp;oid=114001798&amp;loc=d3e33918-111571<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StockholdersEquity</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockholdersEquityAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StockholdersEquityAbstract</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td>xbrli:stringItemType</td>
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<td><strong> Balance Type:</strong></td>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031640565424">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares<br></strong></div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Dec. 31, 2021</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockholdersEquityAbstract', window );"><strong>Stockholders' equity:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_PreferredStockParOrStatedValuePerShare', window );">Preferred stock, par value (in dollars per share)</a></td>
<td class="nump">$ 0.0001<span></span>
</td>
<td class="nump">$ 0.0001<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_PreferredStockSharesAuthorized', window );">Preferred stock, shares authorized (in shares)</a></td>
<td class="nump">25,000,000<span></span>
</td>
<td class="nump">25,000,000<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_PreferredStockSharesIssued', window );">Preferred stock, shares issued (in shares)</a></td>
<td class="nump">0<span></span>
</td>
<td class="nump">0<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_PreferredStockSharesOutstanding', window );">Preferred stock, shares outstanding (in shares)</a></td>
<td class="nump">0<span></span>
</td>
<td class="nump">0<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CommonStockParOrStatedValuePerShare', window );">Common stock, par value (in dollars per share)</a></td>
<td class="nump">$ 0.0001<span></span>
</td>
<td class="nump">$ 0.0001<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CommonStockSharesAuthorized', window );">Common stock, shares authorized (in shares)</a></td>
<td class="nump">350,000,000<span></span>
</td>
<td class="nump">175,000,000<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CommonStockSharesIssued', window );">Common stock, shares issued (in shares)</a></td>
<td class="nump">98,582,583<span></span>
</td>
<td class="nump">73,709,056<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CommonStockSharesOutstanding', window );">Common stock, shares outstanding (in shares)</a></td>
<td class="nump">98,582,583<span></span>
</td>
<td class="nump">73,709,056<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CommonStockParOrStatedValuePerShare">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Face amount or stated value per share of common stock.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CommonStockParOrStatedValuePerShare</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dtr-types:perShareItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CommonStockSharesAuthorized">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The maximum number of common shares permitted to be issued by an entity's charter and bylaws.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CommonStockSharesAuthorized</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CommonStockSharesIssued">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CommonStockSharesIssued</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CommonStockSharesOutstanding">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=126973232&amp;loc=d3e21463-112644<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CommonStockSharesOutstanding</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PreferredStockParOrStatedValuePerShare">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(28))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section 50<br> -Paragraph 13<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126973232&amp;loc=SL123496158-112644<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PreferredStockParOrStatedValuePerShare</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dtr-types:perShareItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PreferredStockSharesAuthorized">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(28))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PreferredStockSharesAuthorized</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PreferredStockSharesIssued">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(28))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section 50<br> -Paragraph 13<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126973232&amp;loc=SL123496158-112644<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PreferredStockSharesIssued</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PreferredStockSharesOutstanding">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(28))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PreferredStockSharesOutstanding</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockholdersEquityAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StockholdersEquityAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031640523840">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="2">3 Months Ended</th>
<th class="th" colspan="2">9 Months Ended</th>
</tr>
<tr>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_IncomeStatementAbstract', window );"><strong>Income Statement [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax', window );">Collaboration revenue</a></td>
<td class="nump">$ 5,573<span></span>
</td>
<td class="nump">$ 11<span></span>
</td>
<td class="nump">$ 11,893<span></span>
</td>
<td class="nump">$ 32<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_OperatingExpensesAbstract', window );"><strong>Operating expenses:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ResearchAndDevelopmentExpense', window );">Research and development</a></td>
<td class="nump">50,639<span></span>
</td>
<td class="nump">35,275<span></span>
</td>
<td class="nump">127,676<span></span>
</td>
<td class="nump">94,645<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_GeneralAndAdministrativeExpense', window );">General and administrative</a></td>
<td class="nump">14,573<span></span>
</td>
<td class="nump">10,124<span></span>
</td>
<td class="nump">42,158<span></span>
</td>
<td class="nump">26,214<span></span>
</td>
</tr>
<tr class="rou">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_OperatingExpenses', window );">Total operating expenses</a></td>
<td class="nump">65,212<span></span>
</td>
<td class="nump">45,399<span></span>
</td>
<td class="nump">169,834<span></span>
</td>
<td class="nump">120,859<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NonoperatingIncomeExpenseAbstract', window );"><strong>Other income (expense):</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_InvestmentIncomeInterest', window );">Interest income</a></td>
<td class="nump">708<span></span>
</td>
<td class="nump">15<span></span>
</td>
<td class="nump">1,017<span></span>
</td>
<td class="nump">36<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_InterestExpense', window );">Interest expense</a></td>
<td class="num">(880)<span></span>
</td>
<td class="num">(98)<span></span>
</td>
<td class="num">(2,364)<span></span>
</td>
<td class="num">(286)<span></span>
</td>
</tr>
<tr class="rou">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NonoperatingIncomeExpense', window );">Total other income (expense), net</a></td>
<td class="num">(172)<span></span>
</td>
<td class="num">(83)<span></span>
</td>
<td class="num">(1,347)<span></span>
</td>
<td class="num">(250)<span></span>
</td>
</tr>
<tr class="reu">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NetIncomeLoss', window );">Net loss</a></td>
<td class="num">(59,811)<span></span>
</td>
<td class="num">(45,471)<span></span>
</td>
<td class="num">(159,288)<span></span>
</td>
<td class="num">(121,077)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent', window );">Unrealized loss on marketable securities</a></td>
<td class="num">(105)<span></span>
</td>
<td class="nump">0<span></span>
</td>
<td class="num">(231)<span></span>
</td>
<td class="nump">0<span></span>
</td>
</tr>
<tr class="reu">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ComprehensiveIncomeNetOfTax', window );">Comprehensive loss</a></td>
<td class="num">(59,916)<span></span>
</td>
<td class="num">(45,471)<span></span>
</td>
<td class="num">(159,519)<span></span>
</td>
<td class="num">(121,077)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic', window );">Net loss attributable to common stockholders &#8212; basic</a></td>
<td class="num">(59,811)<span></span>
</td>
<td class="num">(45,471)<span></span>
</td>
<td class="num">(159,288)<span></span>
</td>
<td class="num">(121,077)<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted', window );">Net loss attributable to common stockholders &#8212; diluted</a></td>
<td class="num">$ (59,811)<span></span>
</td>
<td class="num">$ (45,471)<span></span>
</td>
<td class="num">$ (159,288)<span></span>
</td>
<td class="num">$ (121,077)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EarningsPerShareBasic', window );">Net loss per share attributable to common stockholders &#8212; basic (in dollars per share)</a></td>
<td class="num">$ (0.61)<span></span>
</td>
<td class="num">$ (0.63)<span></span>
</td>
<td class="num">$ (1.75)<span></span>
</td>
<td class="num">$ (1.73)<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EarningsPerShareDiluted', window );">Net loss per share attributable to common stockholders &#8212; diluted (in dollars per share)</a></td>
<td class="num">$ (0.61)<span></span>
</td>
<td class="num">$ (0.63)<span></span>
</td>
<td class="num">$ (1.75)<span></span>
</td>
<td class="num">$ (1.73)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic', window );">Weighted-average number of shares of common stock used in net loss per share attributable to common stockholders &#8212; basic (in shares)</a></td>
<td class="nump">97,641,936<span></span>
</td>
<td class="nump">71,753,004<span></span>
</td>
<td class="nump">91,173,989<span></span>
</td>
<td class="nump">70,129,236<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding', window );">Weighted-average number of shares of common stock used in net loss per share attributable to common stockholders &#8212; diluted (in shares)</a></td>
<td class="nump">97,641,936<span></span>
</td>
<td class="nump">71,753,004<span></span>
</td>
<td class="nump">91,173,989<span></span>
</td>
<td class="nump">70,129,236<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ComprehensiveIncomeNetOfTax">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 220<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.7-04(22))<br> -URI https://asc.fasb.org/extlink&amp;oid=120400993&amp;loc=SL114874131-224263<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section S99<br> -Paragraph 2<br> -Subparagraph (SX 210.5-03(24))<br> -URI https://asc.fasb.org/extlink&amp;oid=126953954&amp;loc=SL114868664-224227<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section 45<br> -Paragraph 5<br> -URI https://asc.fasb.org/extlink&amp;oid=126968391&amp;loc=d3e557-108580<br><br>Reference 4: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 220<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-04(26))<br> -URI https://asc.fasb.org/extlink&amp;oid=120399700&amp;loc=SL114874048-224260<br><br>Reference 5: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1B<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=126968391&amp;loc=SL7669625-108580<br><br>Reference 6: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1A<br> -Subparagraph (c)<br> -URI https://asc.fasb.org/extlink&amp;oid=126968391&amp;loc=SL7669619-108580<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ComprehensiveIncomeNetOfTax</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_EarningsPerShareBasic">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 815<br> -SubTopic 40<br> -Section 65<br> -Paragraph 1<br> -Subparagraph (e)(4)<br> -URI https://asc.fasb.org/extlink&amp;oid=126732423&amp;loc=SL123482106-238011<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 250<br> -SubTopic 10<br> -Section 50<br> -Paragraph 3<br> -URI https://asc.fasb.org/extlink&amp;oid=124431687&amp;loc=d3e22583-107794<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 250<br> -SubTopic 10<br> -Section 50<br> -Paragraph 11<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=124431687&amp;loc=d3e22694-107794<br><br>Reference 4: 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-SubTopic 10<br> -Section S99<br> -Paragraph 2<br> -Subparagraph (SX 210.5-03(25))<br> -URI https://asc.fasb.org/extlink&amp;oid=126953954&amp;loc=SL114868664-224227<br><br>Reference 15: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 45<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=126958026&amp;loc=d3e1252-109256<br><br>Reference 16: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 45<br> -Paragraph 60B<br> -Subparagraph (d)<br> -URI https://asc.fasb.org/extlink&amp;oid=126958026&amp;loc=SL5780133-109256<br><br>Reference 17: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 220<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-04(27))<br> -URI 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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_EarningsPerShareBasic</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dtr-types:perShareItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_EarningsPerShareDiluted">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 55<br> -Paragraph 52<br> -URI https://asc.fasb.org/extlink&amp;oid=128363288&amp;loc=d3e4984-109258<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 250<br> -SubTopic 10<br> -Section 50<br> -Paragraph 7<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=124431687&amp;loc=d3e22644-107794<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 55<br> -Paragraph 15<br> -URI https://asc.fasb.org/extlink&amp;oid=128363288&amp;loc=d3e3842-109258<br><br>Reference 4: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 45<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=126958026&amp;loc=d3e1252-109256<br><br>Reference 5: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 250<br> -SubTopic 10<br> -Section 50<br> -Paragraph 11<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=124431687&amp;loc=d3e22694-107794<br><br>Reference 6: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 250<br> -SubTopic 10<br> -Section 50<br> -Paragraph 4<br> -URI https://asc.fasb.org/extlink&amp;oid=124431687&amp;loc=d3e22595-107794<br><br>Reference 7: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 250<br> -SubTopic 10<br> -Section 50<br> -Paragraph 3<br> -URI https://asc.fasb.org/extlink&amp;oid=124431687&amp;loc=d3e22583-107794<br><br>Reference 8: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 45<br> -Paragraph 60B<br> -Subparagraph (d)<br> -URI https://asc.fasb.org/extlink&amp;oid=126958026&amp;loc=SL5780133-109256<br><br>Reference 9: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 815<br> -SubTopic 40<br> -Section 65<br> -Paragraph 1<br> -Subparagraph (f)<br> -URI https://asc.fasb.org/extlink&amp;oid=126732423&amp;loc=SL123482106-238011<br><br>Reference 10: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 220<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-04(27))<br> -URI https://asc.fasb.org/extlink&amp;oid=120399700&amp;loc=SL114874048-224260<br><br>Reference 11: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=124432515&amp;loc=d3e3550-109257<br><br>Reference 12: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 220<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.7-04(23))<br> -URI https://asc.fasb.org/extlink&amp;oid=120400993&amp;loc=SL114874131-224263<br><br>Reference 13: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 250<br> -SubTopic 10<br> -Section 50<br> -Paragraph 11<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=124431687&amp;loc=d3e22694-107794<br><br>Reference 14: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 45<br> -Paragraph 7<br> -URI https://asc.fasb.org/extlink&amp;oid=126958026&amp;loc=d3e1337-109256<br><br>Reference 15: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 815<br> -SubTopic 40<br> -Section 65<br> -Paragraph 1<br> -Subparagraph (e)(4)<br> -URI https://asc.fasb.org/extlink&amp;oid=126732423&amp;loc=SL123482106-238011<br><br>Reference 16: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section S99<br> -Paragraph 2<br> -Subparagraph (SX 210.5-03(25))<br> -URI https://asc.fasb.org/extlink&amp;oid=126953954&amp;loc=SL114868664-224227<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_EarningsPerShareDiluted</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dtr-types:perShareItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_GeneralAndAdministrativeExpense">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section S99<br> -Paragraph 2<br> -Subparagraph (SX 210.5-03.4)<br> -URI https://asc.fasb.org/extlink&amp;oid=126953954&amp;loc=SL114868664-224227<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_GeneralAndAdministrativeExpense</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncomeStatementAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_IncomeStatementAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_InterestExpense">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of the cost of borrowed funds accounted for as interest expense.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 835<br> -SubTopic 20<br> -Section 50<br> -Paragraph 1<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=6450988&amp;loc=d3e26243-108391<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 835<br> -SubTopic 30<br> -Section 45<br> -Paragraph 3<br> -URI https://asc.fasb.org/extlink&amp;oid=124435984&amp;loc=d3e28555-108399<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 22<br> -Subparagraph (d)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8736-108599<br><br>Reference 4: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section S99<br> -Paragraph 2<br> -Subparagraph (210.5-03(11))<br> -URI https://asc.fasb.org/extlink&amp;oid=126953954&amp;loc=SL114868664-224227<br><br>Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 220<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-04.9)<br> -URI https://asc.fasb.org/extlink&amp;oid=120399700&amp;loc=SL114874048-224260<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_InterestExpense</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_InvestmentIncomeInterest">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section S99<br> -Paragraph 2<br> -Subparagraph (SX 210.5-03.7(b))<br> -URI https://asc.fasb.org/extlink&amp;oid=126953954&amp;loc=SL114868664-224227<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 22<br> -Subparagraph (c)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8736-108599<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_InvestmentIncomeInterest</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetIncomeLoss">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 220<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-04(22))<br> -URI https://asc.fasb.org/extlink&amp;oid=120399700&amp;loc=SL114874048-224260<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 32<br> -Subparagraph (f)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8933-108599<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 250<br> -SubTopic 10<br> -Section 50<br> -Paragraph 4<br> -URI 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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NetIncomeLoss</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 250<br> -SubTopic 10<br> -Section 50<br> -Paragraph 4<br> -URI https://asc.fasb.org/extlink&amp;oid=124431687&amp;loc=d3e22595-107794<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 45<br> -Paragraph 10<br> -URI https://asc.fasb.org/extlink&amp;oid=126958026&amp;loc=d3e1448-109256<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 250<br> -SubTopic 10<br> -Section 50<br> -Paragraph 11<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=124431687&amp;loc=d3e22694-107794<br><br>Reference 4: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 45<br> -Paragraph 11<br> -URI https://asc.fasb.org/extlink&amp;oid=126958026&amp;loc=d3e1377-109256<br><br>Reference 5: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=124432515&amp;loc=d3e3550-109257<br><br>Reference 6: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 22<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8736-108599<br><br>Reference 7: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 250<br> -SubTopic 10<br> -Section 50<br> -Paragraph 11<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=124431687&amp;loc=d3e22694-107794<br><br>Reference 8: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 45<br> -Paragraph 60B<br> -Subparagraph (c)<br> -URI https://asc.fasb.org/extlink&amp;oid=126958026&amp;loc=SL5780133-109256<br><br>Reference 9: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 32<br> -Subparagraph (f)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8933-108599<br><br>Reference 10: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 31<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8924-108599<br><br>Reference 11: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 30<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8906-108599<br><br>Reference 12: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 250<br> -SubTopic 10<br> -Section 50<br> -Paragraph 3<br> -URI https://asc.fasb.org/extlink&amp;oid=124431687&amp;loc=d3e22583-107794<br><br>Reference 13: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 32<br> -Subparagraph (c)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8933-108599<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 45<br> -Paragraph 40<br> -Subparagraph (b)(2)<br> -URI https://asc.fasb.org/extlink&amp;oid=126958026&amp;loc=d3e1930-109256<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 45<br> -Paragraph 40<br> -Subparagraph (b)(3)<br> -URI https://asc.fasb.org/extlink&amp;oid=126958026&amp;loc=d3e1930-109256<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 45<br> -Paragraph 60B<br> -Subparagraph (c)<br> -URI https://asc.fasb.org/extlink&amp;oid=126958026&amp;loc=SL5780133-109256<br><br>Reference 4: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=124432515&amp;loc=d3e3550-109257<br><br>Reference 5: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 45<br> -Paragraph 40<br> -Subparagraph (b)(1)<br> -URI https://asc.fasb.org/extlink&amp;oid=126958026&amp;loc=d3e1930-109256<br><br>Reference 6: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 45<br> -Paragraph 16<br> -URI https://asc.fasb.org/extlink&amp;oid=126958026&amp;loc=d3e1505-109256<br><br>Reference 7: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 45<br> -Paragraph 40<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126958026&amp;loc=d3e1930-109256<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NonoperatingIncomeExpense">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section S99<br> -Paragraph 2<br> -Subparagraph (SX 210.5-03.7)<br> -URI https://asc.fasb.org/extlink&amp;oid=126953954&amp;loc=SL114868664-224227<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NonoperatingIncomeExpense</td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities, attributable to parent entity. Excludes amounts related to other than temporary impairment (OTTI) loss.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 810<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1A<br> -Subparagraph (c)(3)<br> -URI https://asc.fasb.org/extlink&amp;oid=109239629&amp;loc=SL4573702-111684<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 810<br> -SubTopic 10<br> -Section 45<br> -Paragraph 19<br> -URI https://asc.fasb.org/extlink&amp;oid=126929396&amp;loc=SL4569616-111683<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 810<br> -SubTopic 10<br> -Section 45<br> -Paragraph 20<br> -URI https://asc.fasb.org/extlink&amp;oid=126929396&amp;loc=SL4569643-111683<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 912<br> -SubTopic 730<br> -Section 25<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=6472174&amp;loc=d3e58812-109433<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 985<br> -SubTopic 20<br> -Section 50<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=6501960&amp;loc=d3e128462-111756<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 730<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=6420194&amp;loc=d3e21568-108373<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ResearchAndDevelopmentExpense</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
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</table></div>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 30<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8906-108599<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 40<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e9031-108599<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 41<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e9038-108599<br><br>Reference 4: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 32<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8933-108599<br><br>Reference 5: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 32<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8933-108599<br><br>Reference 6: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 50<br> -Paragraph 4<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126920106&amp;loc=SL49130543-203045<br><br>Reference 7: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 22<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8736-108599<br><br>Reference 8: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 22<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8736-108599<br><br>Reference 9: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 42<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e9054-108599<br><br>Reference 10: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 50<br> -Paragraph 5<br> -URI https://asc.fasb.org/extlink&amp;oid=126920106&amp;loc=SL49130545-203045<br><br>Reference 11: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 924<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SAB Topic 11.L)<br> -URI https://asc.fasb.org/extlink&amp;oid=6472922&amp;loc=d3e499488-122856<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=124432515&amp;loc=d3e3550-109257<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 45<br> -Paragraph 16<br> -URI https://asc.fasb.org/extlink&amp;oid=126958026&amp;loc=d3e1505-109256<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=124432515&amp;loc=d3e3550-109257<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 45<br> -Paragraph 10<br> -URI https://asc.fasb.org/extlink&amp;oid=126958026&amp;loc=d3e1448-109256<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031635315536">
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<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Condensed Consolidated Statements of Stockholders' Equity - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th"><div>Total</div></th>
<th class="th"><div>At market equity offering programs</div></th>
<th class="th"><div>Common&#160;Stock</div></th>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SharesOutstanding', window );">Balance at beginning of period (in shares) at Dec. 31, 2020</a></td>
<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
</td>
<td class="nump">68,841,288<span></span>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="nump">$ 228,087<span></span>
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<td class="text">&#160;<span></span>
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<td class="nump">$ 7<span></span>
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<td class="nump">$ 508,499<span></span>
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<td class="nump">$ 0<span></span>
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<td class="num">$ (280,419)<span></span>
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<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised', window );">Exercise of stock options (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">148,472<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised', window );">Exercise of stock options</a></td>
<td class="nump">764<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">764<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod', window );">Vesting of restricted stock units, net of employee tax obligations (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">61,678<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation', window );">Vesting of restricted stock units, net of employee tax obligations</a></td>
<td class="num">(259)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="num">(259)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue', window );">Stock-based compensation expense</a></td>
<td class="nump">4,039<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">4,039<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NetIncomeLoss', window );">Net (loss) income</a></td>
<td class="num">(34,693)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="num">(34,693)<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SharesOutstanding', window );">Balance at end of period (in shares) at Mar. 31, 2021</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">69,051,438<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockholdersEquity', window );">Balance at end of period at Mar. 31, 2021</a></td>
<td class="nump">197,938<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 7<span></span>
</td>
<td class="nump">513,043<span></span>
</td>
<td class="nump">0<span></span>
</td>
<td class="num">(315,112)<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SharesOutstanding', window );">Balance at beginning of period (in shares) at Dec. 31, 2020</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">68,841,288<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockholdersEquity', window );">Balance at beginning of period at Dec. 31, 2020</a></td>
<td class="nump">228,087<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 7<span></span>
</td>
<td class="nump">508,499<span></span>
</td>
<td class="nump">0<span></span>
</td>
<td class="num">(280,419)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward', window );"><strong>Increase (Decrease) in Stockholders' Equity</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NetIncomeLoss', window );">Net (loss) income</a></td>
<td class="num">(121,077)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SharesOutstanding', window );">Balance at end of period (in shares) at Sep. 30, 2021</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">71,865,399<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockholdersEquity', window );">Balance at end of period at Sep. 30, 2021</a></td>
<td class="nump">155,549<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 7<span></span>
</td>
<td class="nump">557,038<span></span>
</td>
<td class="nump">0<span></span>
</td>
<td class="num">(401,496)<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SharesOutstanding', window );">Balance at beginning of period (in shares) at Mar. 31, 2021</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">69,051,438<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockholdersEquity', window );">Balance at beginning of period at Mar. 31, 2021</a></td>
<td class="nump">197,938<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 7<span></span>
</td>
<td class="nump">513,043<span></span>
</td>
<td class="nump">0<span></span>
</td>
<td class="num">(315,112)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward', window );"><strong>Increase (Decrease) in Stockholders' Equity</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodSharesNewIssues', window );">Issuance of common stock under public offering, net of issuance costs (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">2,271,074<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodValueNewIssues', window );">Issuance of common stock under public offering, net of issuance costs</a></td>
<td class="nump">33,287<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">33,287<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised', window );">Exercise of stock options (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">42,506<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised', window );">Exercise of stock options</a></td>
<td class="nump">202<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">202<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans', window );">Purchase of common stock under ESPP (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">36,198<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition', window );">Purchase of common stock under ESPP</a></td>
<td class="nump">417<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">417<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue', window );">Stock-based compensation expense</a></td>
<td class="nump">4,582<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">4,582<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NetIncomeLoss', window );">Net (loss) income</a></td>
<td class="num">(40,913)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="num">(40,913)<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SharesOutstanding', window );">Balance at end of period (in shares) at Jun. 30, 2021</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">71,401,216<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockholdersEquity', window );">Balance at end of period at Jun. 30, 2021</a></td>
<td class="nump">195,513<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 7<span></span>
</td>
<td class="nump">551,531<span></span>
</td>
<td class="nump">0<span></span>
</td>
<td class="num">(356,025)<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward', window );"><strong>Increase (Decrease) in Stockholders' Equity</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_StockIssuanceDiscountsAndCommissionsOnTransaction', window );">Stock issuance costs</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 746<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised', window );">Exercise of stock options (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">137,301<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised', window );">Exercise of stock options</a></td>
<td class="nump">579<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">579<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod', window );">Vesting of restricted stock units, net of employee tax obligations (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">326,882<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue', window );">Stock-based compensation expense</a></td>
<td class="nump">4,928<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">4,928<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NetIncomeLoss', window );">Net (loss) income</a></td>
<td class="num">(45,471)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="num">(45,471)<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SharesOutstanding', window );">Balance at end of period (in shares) at Sep. 30, 2021</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">71,865,399<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockholdersEquity', window );">Balance at end of period at Sep. 30, 2021</a></td>
<td class="nump">155,549<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 7<span></span>
</td>
<td class="nump">557,038<span></span>
</td>
<td class="nump">0<span></span>
</td>
<td class="num">(401,496)<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SharesOutstanding', window );">Balance at beginning of period (in shares) at Dec. 31, 2021</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">73,709,056<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockholdersEquity', window );">Balance at beginning of period at Dec. 31, 2021</a></td>
<td class="nump">121,741<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 7<span></span>
</td>
<td class="nump">572,213<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="num">(450,479)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward', window );"><strong>Increase (Decrease) in Stockholders' Equity</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodSharesNewIssues', window );">Issuance of common stock under public offering, net of issuance costs (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">13,169,903<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodValueNewIssues', window );">Issuance of common stock under public offering, net of issuance costs</a></td>
<td class="nump">60,462<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 2<span></span>
</td>
<td class="nump">60,460<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised', window );">Exercise of stock options (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">26,951<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised', window );">Exercise of stock options</a></td>
<td class="nump">96<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">96<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod', window );">Vesting of restricted stock units, net of employee tax obligations (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">167,174<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue', window );">Stock-based compensation expense</a></td>
<td class="nump">5,485<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">5,485<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NetIncomeLoss', window );">Net (loss) income</a></td>
<td class="num">(47,258)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="num">(47,258)<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SharesOutstanding', window );">Balance at end of period (in shares) at Mar. 31, 2022</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">87,073,084<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockholdersEquity', window );">Balance at end of period at Mar. 31, 2022</a></td>
<td class="nump">140,526<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 9<span></span>
</td>
<td class="nump">638,254<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="num">(497,737)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward', window );"><strong>Increase (Decrease) in Stockholders' Equity</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_StockIssuanceDiscountsAndCommissionsOnTransaction', window );">Stock issuance costs</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">1,322<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SharesOutstanding', window );">Balance at beginning of period (in shares) at Dec. 31, 2021</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">73,709,056<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockholdersEquity', window );">Balance at beginning of period at Dec. 31, 2021</a></td>
<td class="nump">$ 121,741<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 7<span></span>
</td>
<td class="nump">572,213<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="num">(450,479)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward', window );"><strong>Increase (Decrease) in Stockholders' Equity</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_WarrantsExercisedInPeriod', window );">Exercise of common stock warrant in exchange for common stock (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">16,654<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised', window );">Exercise of stock options (in shares)</a></td>
<td class="nump">54,299<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NetIncomeLoss', window );">Net (loss) income</a></td>
<td class="num">$ (159,288)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SharesOutstanding', window );">Balance at end of period (in shares) at Sep. 30, 2022</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">98,582,583<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockholdersEquity', window );">Balance at end of period at Sep. 30, 2022</a></td>
<td class="nump">90,229<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 10<span></span>
</td>
<td class="nump">700,217<span></span>
</td>
<td class="num">(231)<span></span>
</td>
<td class="num">(609,767)<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SharesOutstanding', window );">Balance at beginning of period (in shares) at Mar. 31, 2022</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">87,073,084<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockholdersEquity', window );">Balance at beginning of period at Mar. 31, 2022</a></td>
<td class="nump">140,526<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 9<span></span>
</td>
<td class="nump">638,254<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="num">(497,737)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward', window );"><strong>Increase (Decrease) in Stockholders' Equity</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodSharesNewIssues', window );">Issuance of common stock under public offering, net of issuance costs (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">9,904,964<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodValueNewIssues', window );">Issuance of common stock under public offering, net of issuance costs</a></td>
<td class="nump">39,899<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 1<span></span>
</td>
<td class="nump">39,898<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_WarrantsExercisedInPeriod', window );">Exercise of common stock warrant in exchange for common stock (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">16,654<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans', window );">Purchase of common stock under ESPP (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">154,235<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition', window );">Purchase of common stock under ESPP</a></td>
<td class="nump">606<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">606<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod', window );">Vesting of restricted stock units, net of employee tax obligations (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">17,417<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue', window );">Stock-based compensation expense</a></td>
<td class="nump">5,348<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">5,348<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent', window );">Other comprehensive income (loss), net of tax, portion attributable to parent</a></td>
<td class="num">(126)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="num">(126)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NetIncomeLoss', window );">Net (loss) income</a></td>
<td class="num">(52,219)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="num">(52,219)<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SharesOutstanding', window );">Balance at end of period (in shares) at Jun. 30, 2022</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">97,166,354<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockholdersEquity', window );">Balance at end of period at Jun. 30, 2022</a></td>
<td class="nump">134,034<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 10<span></span>
</td>
<td class="nump">684,106<span></span>
</td>
<td class="num">(126)<span></span>
</td>
<td class="num">(549,956)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward', window );"><strong>Increase (Decrease) in Stockholders' Equity</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_StockIssuanceDiscountsAndCommissionsOnTransaction', window );">Stock issuance costs</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">941<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodSharesNewIssues', window );">Issuance of common stock under public offering, net of issuance costs (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">1,382,631<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodValueNewIssues', window );">Issuance of common stock under public offering, net of issuance costs</a></td>
<td class="nump">10,626<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">10,626<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised', window );">Exercise of stock options (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">27,348<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised', window );">Exercise of stock options</a></td>
<td class="nump">110<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">110<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod', window );">Vesting of restricted stock units, net of employee tax obligations (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">6,250<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue', window );">Stock-based compensation expense</a></td>
<td class="nump">5,375<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">5,375<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent', window );">Other comprehensive income (loss), net of tax, portion attributable to parent</a></td>
<td class="num">(105)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="num">(105)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NetIncomeLoss', window );">Net (loss) income</a></td>
<td class="num">(59,811)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="num">(59,811)<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SharesOutstanding', window );">Balance at end of period (in shares) at Sep. 30, 2022</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">98,582,583<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rc">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockholdersEquity', window );">Balance at end of period at Sep. 30, 2022</a></td>
<td class="nump">$ 90,229<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 10<span></span>
</td>
<td class="nump">$ 700,217<span></span>
</td>
<td class="num">$ (231)<span></span>
</td>
<td class="num">$ (609,767)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward', window );"><strong>Increase (Decrease) in Stockholders' Equity</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_StockIssuanceDiscountsAndCommissionsOnTransaction', window );">Stock issuance costs</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 251<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_StockIssuanceDiscountsAndCommissionsOnTransaction">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Discounts and commissions deducted from cash proceeds received on stock transaction.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_StockIssuanceDiscountsAndCommissionsOnTransaction</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_WarrantsExercisedInPeriod">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Shares of stock issued as a result of the exercise of warrants.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_WarrantsExercisedInPeriod</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of decrease to equity for grantee's tax withholding obligation for award under share-based payment arrangement.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of increase in additional paid-in capital (APIC) for recognition of cost for employee stock purchase program (ESPP) award under share-based payment arrangement.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of increase to additional paid-in capital (APIC) for recognition of cost for award under share-based payment arrangement.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 20<br> -Section 55<br> -Paragraph 12<br> -URI https://asc.fasb.org/extlink&amp;oid=126964447&amp;loc=d3e11149-113907<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 20<br> -Section 55<br> -Paragraph 13<br> -URI https://asc.fasb.org/extlink&amp;oid=126964447&amp;loc=d3e11178-113907<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 35<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=126961718&amp;loc=d3e4534-113899<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_IncreaseDecreaseInStockholdersEquityRollForward</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetIncomeLoss">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.</p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NetIncomeLoss</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount after tax of other comprehensive income (loss) attributable to parent entity.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1B<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=126968391&amp;loc=SL7669625-108580<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 810<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1A<br> -Subparagraph (c)(3)<br> -URI https://asc.fasb.org/extlink&amp;oid=109239629&amp;loc=SL4573702-111684<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 810<br> -SubTopic 10<br> -Section 45<br> -Paragraph 20<br> -URI https://asc.fasb.org/extlink&amp;oid=126929396&amp;loc=SL4569643-111683<br><br>Reference 4: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1A<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=126968391&amp;loc=SL7669619-108580<br><br>Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 810<br> -SubTopic 10<br> -Section 45<br> -Paragraph 19<br> -URI https://asc.fasb.org/extlink&amp;oid=126929396&amp;loc=SL4569616-111683<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(2)(iii)(02)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_SharesOutstanding">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of shares issued which are neither cancelled nor held in the treasury.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_SharesOutstanding</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of shares issued during the period as a result of an employee stock purchase plan.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=126973232&amp;loc=d3e21463-112644<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.3-04)<br> -URI https://asc.fasb.org/extlink&amp;oid=120397183&amp;loc=d3e187085-122770<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(28))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockIssuedDuringPeriodSharesNewIssues">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of new stock issued during the period.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=126973232&amp;loc=d3e21463-112644<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.3-04)<br> -URI https://asc.fasb.org/extlink&amp;oid=120397183&amp;loc=d3e187085-122770<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(28))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StockIssuedDuringPeriodSharesNewIssues</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of share options (or share units) exercised during the current period.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(1)(iv)(02)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.3-04)<br> -URI https://asc.fasb.org/extlink&amp;oid=120397183&amp;loc=d3e187085-122770<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(28))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=126973232&amp;loc=d3e21463-112644<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockIssuedDuringPeriodValueNewIssues">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.3-04)<br> -URI https://asc.fasb.org/extlink&amp;oid=120397183&amp;loc=d3e187085-122770<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=126973232&amp;loc=d3e21463-112644<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(28))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StockIssuedDuringPeriodValueNewIssues</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Value of stock issued as a result of the exercise of stock options.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=126973232&amp;loc=d3e21463-112644<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.3-04)<br> -URI https://asc.fasb.org/extlink&amp;oid=120397183&amp;loc=d3e187085-122770<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.29-31)<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockholdersEquity">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 235<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.4-08(g)(1)(ii))<br> -URI https://asc.fasb.org/extlink&amp;oid=120395691&amp;loc=d3e23780-122690<br><br>Reference 2: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 852<br> -SubTopic 10<br> -Section 55<br> -Paragraph 10<br> -URI https://asc.fasb.org/extlink&amp;oid=84165509&amp;loc=d3e56426-112766<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 310<br> -SubTopic 10<br> -Section S99<br> -Paragraph 2<br> -Subparagraph (SAB Topic 4.E)<br> -URI https://asc.fasb.org/extlink&amp;oid=122038336&amp;loc=d3e74512-122707<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(31))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(30))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 825<br> -SubTopic 10<br> -Section 50<br> -Paragraph 28<br> -Subparagraph (f)<br> -URI https://asc.fasb.org/extlink&amp;oid=123596393&amp;loc=d3e14064-108612<br><br>Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 323<br> -SubTopic 10<br> -Section 50<br> -Paragraph 3<br> -Subparagraph (c)<br> -URI https://asc.fasb.org/extlink&amp;oid=114001798&amp;loc=d3e33918-111571<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StockholdersEquity</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031642582800">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="4">3 Months Ended</th>
</tr>
<tr>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Jun. 30, 2022</div></th>
<th class="th"><div>Mar. 31, 2022</div></th>
<th class="th"><div>Jun. 30, 2021</div></th>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SubsidiarySaleOfStockAxis=mrsn_AtMarketEquityOfferingProgramsMember', window );">At market equity offering programs</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_StockIssuanceDiscountsAndCommissionsOnTransaction', window );">Stock issuance costs</a></td>
<td class="nump">$ 251<span></span>
</td>
<td class="nump">$ 941<span></span>
</td>
<td class="nump">$ 1,322<span></span>
</td>
<td class="nump">$ 746<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_StockIssuanceDiscountsAndCommissionsOnTransaction">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Discounts and commissions deducted from cash proceeds received on stock transaction.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_StockIssuanceDiscountsAndCommissionsOnTransaction</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_SubsidiarySaleOfStockAxis=mrsn_AtMarketEquityOfferingProgramsMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_SubsidiarySaleOfStockAxis=mrsn_AtMarketEquityOfferingProgramsMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
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<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031640449104">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Condensed Consolidated Statements of Cash Flows - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="2">9 Months Ended</th>
</tr>
<tr>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract', window );"><strong>Cash flows from operating activities</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ProfitLoss', window );">Net loss</a></td>
<td class="num">$ (159,288)<span></span>
</td>
<td class="num">$ (121,077)<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract', window );"><strong>Adjustments to reconcile net loss to net cash used in operating activities:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DepreciationDepletionAndAmortization', window );">Depreciation</a></td>
<td class="nump">645<span></span>
</td>
<td class="nump">644<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments', window );">Net amortization of premiums and discounts on marketable securities</a></td>
<td class="num">(396)<span></span>
</td>
<td class="nump">0<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensation', window );">Stock-based compensation</a></td>
<td class="nump">16,208<span></span>
</td>
<td class="nump">13,549<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_OtherNoncashIncomeExpense', window );">Other non-cash items</a></td>
<td class="nump">574<span></span>
</td>
<td class="nump">119<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract', window );"><strong>Changes in operating assets and liabilities:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets', window );">Prepaid expenses and other current assets</a></td>
<td class="nump">2,459<span></span>
</td>
<td class="num">(4,104)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInOtherOperatingAssets', window );">Other assets</a></td>
<td class="nump">0<span></span>
</td>
<td class="num">(617)<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInAccountsPayable', window );">Accounts payable</a></td>
<td class="nump">1,153<span></span>
</td>
<td class="num">(2,429)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInAccruedLiabilities', window );">Accrued expenses</a></td>
<td class="nump">11,848<span></span>
</td>
<td class="nump">16,047<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_IncreaseDecreaseInOperatingLeaseAssets', window );">Operating lease right-of-use assets</a></td>
<td class="nump">2,127<span></span>
</td>
<td class="nump">1,548<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInOperatingLeaseLiability', window );">Operating lease liabilities</a></td>
<td class="num">(1,861)<span></span>
</td>
<td class="num">(1,236)<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_IncreaseDecreaseInContractWithCustomerLiability', window );">Deferred revenue</a></td>
<td class="nump">128,397<span></span>
</td>
<td class="num">(32)<span></span>
</td>
</tr>
<tr class="rou">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NetCashProvidedByUsedInOperatingActivities', window );">Net cash provided by (used in) operating activities</a></td>
<td class="nump">1,866<span></span>
</td>
<td class="num">(97,588)<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract', window );"><strong>Cash flows from investing activities</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities', window );">Maturities of marketable securities</a></td>
<td class="nump">54,000<span></span>
</td>
<td class="nump">0<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt', window );">Purchase of marketable securities</a></td>
<td class="num">(159,878)<span></span>
</td>
<td class="nump">0<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment', window );">Purchase of property and equipment</a></td>
<td class="num">(1,412)<span></span>
</td>
<td class="num">(493)<span></span>
</td>
</tr>
<tr class="reu">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NetCashProvidedByUsedInInvestingActivities', window );">Net cash used in investing activities</a></td>
<td class="num">(107,290)<span></span>
</td>
<td class="num">(493)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract', window );"><strong>Cash flows from financing activities</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ProceedsFromIssuanceOfCommonStock', window );">Net proceeds from at-the-market facilities</a></td>
<td class="nump">110,954<span></span>
</td>
<td class="nump">33,287<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ProceedsFromStockOptionsExercised', window );">Proceeds from exercise of stock options</a></td>
<td class="nump">206<span></span>
</td>
<td class="nump">1,545<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans', window );">Proceeds from purchases of common stock under ESPP</a></td>
<td class="nump">606<span></span>
</td>
<td class="nump">417<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation', window );">Payment of employee tax obligations related to vesting of restricted stock units</a></td>
<td class="nump">0<span></span>
</td>
<td class="num">(259)<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FinanceLeasePrincipalPayments', window );">Payments under finance lease obligations</a></td>
<td class="num">(207)<span></span>
</td>
<td class="num">(139)<span></span>
</td>
</tr>
<tr class="rou">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NetCashProvidedByUsedInFinancingActivities', window );">Net cash provided by financing activities</a></td>
<td class="nump">111,559<span></span>
</td>
<td class="nump">34,851<span></span>
</td>
</tr>
<tr class="reu">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect', window );">Increase (decrease) in cash, cash equivalents and restricted cash</a></td>
<td class="nump">6,135<span></span>
</td>
<td class="num">(63,230)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents', window );">Cash, cash equivalents and restricted cash, beginning of period</a></td>
<td class="nump">178,425<span></span>
</td>
<td class="nump">255,415<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents', window );">Cash, cash equivalents and restricted cash, end of period</a></td>
<td class="nump">184,560<span></span>
</td>
<td class="nump">192,185<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SupplementalCashFlowInformationAbstract', window );"><strong>Supplemental disclosures of non-cash activities:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CapitalExpendituresIncurredButNotYetPaid', window );">Purchases of property and equipment in accounts payable and accrued expenses</a></td>
<td class="nump">407<span></span>
</td>
<td class="nump">46<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_InterestPaidNet', window );">Cash paid for interest</a></td>
<td class="nump">1,746<span></span>
</td>
<td class="nump">187<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability', window );">Right-of-use assets obtained in exchange for operating lease liabilities</a></td>
<td class="nump">298<span></span>
</td>
<td class="nump">3,783<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability', window );">Right-of-use assets obtained in exchange for financing lease liabilities</a></td>
<td class="nump">$ 0<span></span>
</td>
<td class="nump">$ 609<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_IncreaseDecreaseInOperatingLeaseAssets">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The increase (decrease) during the reporting period in operating lease assets</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_IncreaseDecreaseInOperatingLeaseAssets</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3602-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CapitalExpendituresIncurredButNotYetPaid">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Future cash outflow to pay for purchases of fixed assets that have occurred.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 50<br> -Paragraph 5<br> -URI https://asc.fasb.org/extlink&amp;oid=126999549&amp;loc=d3e4332-108586<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 50<br> -Paragraph 4<br> -URI https://asc.fasb.org/extlink&amp;oid=126999549&amp;loc=d3e4313-108586<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 50<br> -Paragraph 3<br> -URI https://asc.fasb.org/extlink&amp;oid=126999549&amp;loc=d3e4304-108586<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CapitalExpendituresIncurredButNotYetPaid</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 24<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3521-108585<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 4<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3044-108585<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 50<br> -Paragraph 8<br> -URI https://asc.fasb.org/extlink&amp;oid=126999549&amp;loc=SL98516268-108586<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 830<br> -SubTopic 230<br> -Section 45<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=123444420&amp;loc=d3e33268-110906<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 24<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3521-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DepreciationDepletionAndAmortization">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 22<br> -Subparagraph (e)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8736-108599<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3602-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DepreciationDepletionAndAmortization</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_FinanceLeasePrincipalPayments">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of cash outflow for principal payment on finance lease.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 842<br> -SubTopic 20<br> -Section 45<br> -Paragraph 5<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=123391704&amp;loc=SL77918643-209977<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 842<br> -SubTopic 20<br> -Section 50<br> -Paragraph 4<br> -Subparagraph (g)(1)<br> -URI https://asc.fasb.org/extlink&amp;oid=128292326&amp;loc=SL77918686-209980<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_FinanceLeasePrincipalPayments</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncreaseDecreaseInAccountsPayable">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3602-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_IncreaseDecreaseInAccountsPayable</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncreaseDecreaseInAccruedLiabilities">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The increase (decrease) during the reporting period in the aggregate amount of expenses incurred but not yet paid.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3602-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_IncreaseDecreaseInAccruedLiabilities</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncreaseDecreaseInContractWithCustomerLiability">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration has been received or is receivable.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3602-108585<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 912<br> -SubTopic 310<br> -Section 45<br> -Paragraph 11<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=126938201&amp;loc=d3e55415-109406<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_IncreaseDecreaseInContractWithCustomerLiability</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_IncreaseDecreaseInOperatingCapitalAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncreaseDecreaseInOperatingLeaseLiability">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of increase (decrease) in obligation for operating lease.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 842<br> -SubTopic 20<br> -Section 50<br> -Paragraph 4<br> -Subparagraph (g)(1)<br> -URI https://asc.fasb.org/extlink&amp;oid=128292326&amp;loc=SL77918686-209980<br><br>Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3602-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_IncreaseDecreaseInOperatingLeaseLiability</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncreaseDecreaseInOtherOperatingAssets">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of increase (decrease) in operating assets classified as other.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3602-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_IncreaseDecreaseInOtherOperatingAssets</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of increase (decrease) in prepaid expenses, and assets classified as other.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3602-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_InterestPaidNet">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=126999549&amp;loc=d3e4297-108586<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 17<br> -Subparagraph (d)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3367-108585<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 25<br> -Subparagraph (e)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3536-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_InterestPaidNet</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetCashProvidedByUsedInFinancingActivities">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 24<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3521-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NetCashProvidedByUsedInFinancingActivities</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetCashProvidedByUsedInInvestingActivities">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 24<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3521-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NetCashProvidedByUsedInInvestingActivities</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 25<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3536-108585<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 24<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3521-108585<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3602-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NetCashProvidedByUsedInOperatingActivities</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OtherNoncashIncomeExpense">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of income (expense) included in net income that results in no cash inflow (outflow), classified as other.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3602-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_OtherNoncashIncomeExpense</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td><strong> Data Type:</strong></td>
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<tr>
<td><strong> Balance Type:</strong></td>
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</tr>
<tr>
<td><strong> Period Type:</strong></td>
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</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 15<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3291-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
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<td><strong> Balance Type:</strong></td>
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</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of cash outflow to acquire investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 13<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3213-108585<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 11<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3151-108585<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 320<br> -SubTopic 10<br> -Section 45<br> -Paragraph 11<br> -URI https://asc.fasb.org/extlink&amp;oid=124260329&amp;loc=d3e26853-111562<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 13<br> -Subparagraph (c)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3213-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PaymentsToAcquirePropertyPlantAndEquipment</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td><strong> Balance Type:</strong></td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProceedsFromIssuanceOfCommonStock">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The cash inflow from the additional capital contribution to the entity.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 14<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3255-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ProceedsFromIssuanceOfCommonStock</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of cash inflow from issuance of shares under share-based payment arrangement. Excludes option exercised.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 14<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3255-108585<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2A<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=SL79508275-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td><strong> Data Type:</strong></td>
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<tr>
<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of cash inflow from maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 320<br> -SubTopic 10<br> -Section 45<br> -Paragraph 11<br> -URI https://asc.fasb.org/extlink&amp;oid=124260329&amp;loc=d3e26853-111562<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 11<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3151-108585<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 12<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3179-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProceedsFromStockOptionsExercised">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of cash inflow from exercise of option under share-based payment arrangement.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2A<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=SL79508275-113901<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 14<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3255-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ProceedsFromStockOptionsExercised</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProfitLoss">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.</p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of increase in right-of-use asset obtained in exchange for finance lease liability.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 842<br> -SubTopic 20<br> -Section 55<br> -Paragraph 53<br> -URI https://asc.fasb.org/extlink&amp;oid=123414884&amp;loc=SL77918982-209971<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 842<br> -SubTopic 20<br> -Section 50<br> -Paragraph 4<br> -Subparagraph (g)(2)<br> -URI https://asc.fasb.org/extlink&amp;oid=128292326&amp;loc=SL77918686-209980<br></p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of increase in right-of-use asset obtained in exchange for operating lease liability.</p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of noncash expense for share-based payment arrangement.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 28<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3602-108585<br></p></div>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031726699968">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Nature of business and basis of presentation<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
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<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract', window );"><strong>Organization, Consolidation and Presentation of Financial Statements [Abstract]</strong></a></td>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_BusinessDescriptionAndBasisOfPresentationTextBlock', window );">Nature of business and basis of presentation</a></td>
<td class="text">Nature of business and basis of presentation<div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Mersana Therapeutics, Inc. is a clinical-stage biopharmaceutical company focused on developing antibody-drug conjugates ("ADCs") that offer a clinically meaningful benefit for cancer patients with significant unmet need. The Company has leveraged over 20 years of industry learning in the ADC field to develop proprietary and differentiated technology platforms that enable it to develop ADCs that are designed to have improved efficacy, safety and tolerability relative to existing ADC therapies. The Company&#8217;s innovative platforms include Dolaflexin and Dolasynthen, each of which deliver the DolaLock payload, as well as Immunosynthen, which delivers the novel stimulator of interferon genes ("STING") agonist ImmunoLock payload. The Company&#8217;s product candidates include upifitamab rilsodotin ("UpRi"), XMT-1660 and XMT-2056. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company's lead product candidate, UpRi, is a first-in-class Dolaflexin ADC targeting NaPi2b, an antigen broadly expressed in ovarian cancer and other cancers with limited expression in healthy tissues. The Company is currently evaluating UpRi in platinum-resistant ovarian cancer in a single-arm registrational trial, referred to as UPLIFT. The Company is also conducting a placebo-controlled Phase 3 clinical trial, referred to as UP-NEXT, to investigate UpRi as a single-agent maintenance treatment in patients with platinum-sensitive ovarian cancer that have high NaPi2b expression. Additionally, the Company is conducting a Phase 1/2  combination trial, referred to as UPGRADE-A. UPGRADE-A is exploring the combination of UpRi with carboplatin, a standard platinum chemotherapy broadly used in the treatment of platinum-sensitive ovarian cancer. The Company may explore other combinations as part of a series of UPGRADE trials in the future.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company is also investigating XMT-1660, a B7-H4-directed Dolasynthen ADC, in a Phase 1 clinical trial enrolling patients with solid tumors, including in breast, endometrial and ovarian cancers. Additionally, the Company is developing XMT-2056, an Immunosynthen STING-agonist ADC that targets a novel epitope of human epidermal growth factor receptor 2 ("HER2"). The Company also has two additional earlier stage preclinical candidates, XMT-2068 and XMT-2175, that leverage the Company's Immunosynthen platform and target tumor-associated antigens.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company is subject to risks common to companies in the biotechnology industry including, but not limited to, the need for additional capital, risks of failure of preclinical studies and clinical trials, the need to obtain marketing approval and reimbursement for any drug product candidate that it may identify and develop, the need to successfully commercialize and gain market acceptance of its product candidates, dependence on key personnel, protection of proprietary technology, compliance with government regulations, development of technological innovations by competitors, reliance on third party manufacturers and the ability to transition from pilot-scale production to large-scale manufacturing of products.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company has incurred cumulative net losses since inception. For the three months ended September&#160;30, 2022, the net loss was $59.8 million, compared to $45.5 million in the three months ended September&#160;30, 2021. For the nine months ended September&#160;30, 2022, the net loss was $159.3 million, compared to $121.1 million in the nine months ended September&#160;30, 2021. The Company expects to continue to incur operating losses for at least the next several years. As of September&#160;30, 2022, the Company had an accumulated deficit of $609.8 million. The future success of the Company is dependent on, among other factors, its ability to identify and develop its product candidates and ultimately upon its ability to attain profitable operations. The Company has devoted substantially all of its financial resources and efforts to research and development and general and administrative expense to support such research and development. Net losses and negative operating cash flows have had, and will continue to have, an adverse effect on the Company&#8217;s stockholders' equity and working&#160;capital.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company believes that its currently available funds will be sufficient to fund the Company&#8217;s operations through at least the next twelve months from the issuance of this Quarterly Report on Form 10-Q. Management&#8217;s belief with respect to its ability to fund operations is based on estimates that are subject to risks and uncertainties. If actual results are different from management&#8217;s estimates, the Company may need to seek additional funding.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company&#8217;s unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States ("U.S.&#160;GAAP") and the rules and regulations of the Securities and Exchange Commission ("SEC"). Any reference in these notes to applicable guidance is meant to refer to the authoritative U.S. GAAP as found in the Accounting Standards Codification ("ASC") and Accounting Standards Updates ("ASU") of the Financial Accounting Standards Board ("FASB").</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with U.S. GAAP have been condensed or omitted from this report, as is permitted by such rules and regulations. Accordingly, these financial statements should be read in conjunction with the audited financial statements as of and for the year ended December&#160;31, 2021 and the notes thereto, included in the Company&#8217;s Annual Report on Form 10-K for the year ended December 31, 2021, filed with the SEC on February 28, 2022.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The unaudited condensed consolidated financial statements have been prepared on the same basis as the audited financial statements. In the opinion of the Company&#8217;s management, the accompanying unaudited condensed consolidated financial statements contain all adjustments that are necessary to present fairly the Company&#8217;s financial position as of September&#160;30, 2022, the results of its operations for the three and nine months ended September&#160;30, 2022 and 2021, the statements of stockholders&#8217; equity for the three and nine months ended September&#160;30, 2022 and 2021 and statements of cash flows for the nine months ended September&#160;30, 2022 and 2021. Such adjustments are of a normal and recurring nature. The results for the three and nine months ended September&#160;30, 2022 are not necessarily indicative of the results for the year ending December&#160;31, 2022, or for any future period.</span></div><span></span>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 235<br> -URI https://asc.fasb.org/topic&amp;trid=2122369<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 205<br> -URI https://asc.fasb.org/topic&amp;trid=2122149<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 275<br> -URI https://asc.fasb.org/topic&amp;trid=2134479<br></p></div>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031642023440">
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<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Summary of significant accounting policies<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
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<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AccountingPoliciesAbstract', window );"><strong>Accounting Policies [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SignificantAccountingPoliciesTextBlock', window );">Summary of significant accounting policies</a></td>
<td class="text">Summary of significant accounting policies<div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Principles of Consolidation</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The accompanying unaudited condensed consolidated financial statements include those of the Company and its wholly owned subsidiary, Mersana Securities Corp. All intercompany balances and transactions have been eliminated.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of the Company&#8217;s unaudited condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, equity, revenue, expenses and related disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenue and expenses during the reporting period. On an ongoing basis, the Company&#8217;s management evaluates its estimates which include, but are not limited to, management&#8217;s judgments with respect to the identification of performance obligations and standalone selling prices of those performance obligations within its revenue arrangements, accrued preclinical, manufacturing and clinical expenses, valuation of stock-based awards and income taxes. Actual results could differ from those estimates.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Segment Information</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Operating segments are defined as components of an enterprise about which separate discrete information is available for evaluation by the chief operating decision-maker, or decision making group, in deciding how to allocate resources and assess performance. The Company views its operations and manages its business as a single operating segment, which is the business of discovering and developing ADCs.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Summary of Accounting Policies</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The significant accounting policies used in preparation of these condensed consolidated financial statements for the three and nine months ended September&#160;30, 2022 are consistent with those discussed in Note 2, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Summary of Significant Accounting Policies</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, in the Company&#8217;s Annual Report on Form 10-K for the year ended December 31, 2021.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Fair Value Measurements</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Fair value is defined as the price that would be received upon sale of an asset or paid to transfer a liability between market participants at measurement dates. ASC&#160;820,&#160;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Fair Value Measurement,</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> establishes a three-level valuation hierarchy for instruments measured at fair value. The hierarchy is based on the transparency of inputs to the valuation of an asset or liability as of the measurement date. The three levels are defined as follows:</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Level&#160;1&#8212;Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Level&#160;2&#8212;Inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Level&#160;3&#8212;Inputs to the valuation methodology are unobservable and significant to the fair value measurement.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Concentration of Credit Risk and Off-balance Sheet Risk</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Financial instruments that potentially subject the Company to concentrations of credit risk primarily consist of cash equivalents and marketable securities. Under its investment policy, the Company limits amounts invested in such securities by credit rating, maturity, industry group, investment type and issuer, except for securities issued by the U.S. government. The Company does not believe that it is subject to any significant concentrations of credit risk from these financial instruments. The Company has no financial instruments with off-balance sheet risk, such as foreign exchange contracts, option contracts, or other foreign hedging arrangements. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Marketable Securities</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company&#8217;s investment strategy is focused on capital preservation. The Company invests in instruments that meet the credit quality standards outlined in the Company&#8217;s investment policy. Short-term marketable securities consist of investments in debt securities with maturities greater than three months and less than one year from the balance sheet date. The Company classifies all of its marketable securities as available-for-sale. Accordingly, these investments are recorded at fair value. Fair value is determined based on quoted market prices. Amortization and accretion of discounts and premiums are recorded as interest income within other income (expense), net. Realized gains and losses are included in other income (expense), net. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company assesses its available-for-sale debt securities under the available-for-sale debt security impairment model in ASC 326, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Financial Instruments - Credit Losses</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, as of each reporting date in order to determine if a portion of any decline in fair value below carrying value recognized on its available-for-sale debt securities is the result of a credit loss. The Company records credit losses in the consolidated statements of operations and comprehensive loss as a component of other income (expense), net, which is limited to the difference between the fair value and the amortized cost of the security. To date, the Company has not recorded any credit losses on its available-for-sale debt securities.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Cash and Cash Equivalents</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company considers all highly-liquid investments with an original maturity, or a remaining maturity at the time of purchase, of three months or less to be cash equivalents. The Company invests excess cash primarily in money market funds, commercial paper and government agency securities, which are highly liquid and have strong credit ratings. The Company determined that these investments are subject to minimal credit and market risks. Cash and cash equivalents are stated at cost, which approximates market value.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Recently Issued Accounting Pronouncements</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">From time to time, new accounting pronouncements are issued by the FASB or other standard setting bodies that the Company adopts as of the specified effective date. Unless otherwise discussed below, the Company does not believe that the adoption of recently issued standards have or may have a material impact on the Company's condensed consolidated financial statements or disclosures.</span></div><span></span>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The entire disclosure for all significant accounting policies of the reporting entity.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 235<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=126899994&amp;loc=d3e18726-107790<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 235<br> -URI https://asc.fasb.org/topic&amp;trid=2122369<br></p></div>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031726780992">
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<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Collaboration agreements<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
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<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
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<td class="text">&#160;<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CollaborativeArrangementDisclosureTextBlock', window );">Collaboration agreements</a></td>
<td class="text">Collaboration agreements<div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">GlaxoSmithKline Intellectual Property (No. 4) Limited</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">On August 6, 2022, the Company entered into a Collaboration, Option and License Agreement (the "GSK Agreement") with GlaxoSmithKline Intellectual Property (No. 4) Limited ("GSK"), pursuant to which the Company granted GSK an exclusive option to obtain an exclusive license (the &#8220;Option&#8221;) to co-develop and to commercialize products containing XMT-2056 (the "Licensed Products"), exercisable within a specified time period (the &#8220;Option Period&#8221;) after the Company delivers to GSK data resulting from completion of dose escalation with enrichment for breast cancer patients in a Phase 1 single-agent clinical trial of XMT-2056. GSK&#8217;s exercise of the Option may require clearance under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (&#8220;HSR Clearance&#8221; and GSK&#8217;s exercise of the Option following any applicable HSR Clearance, the &#8220;GSK Option Exercise&#8221;). Prior to the GSK Option Exercise, the Company will lead and will be responsible for the costs of manufacturing, research, and early clinical development related to its XMT-2056 program. After the GSK Option Exercise, if any, GSK may elect to manufacture XMT-2056, and GSK and the Company will co-develop XMT-2056 aimed at the approval of Licensed Product(s) in the United States and the European Union, with GSK being responsible for the majority of the development costs. GSK will be responsible for all development costs aimed solely at gaining approval outside the United States and European Union. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Pursuant to the GSK Agreement, following the GSK Option Exercise and subject to certain exceptions and specified payment obligations, the Company&#8217;s aggregate shared development costs are capped at a fixed amount, with any amounts in excess to be borne by GSK unless and until the Company exercises its option to receive (or bear) a specified share of U.S. profits (or losses) for any Licensed Products (&#8220;Profit Share Election&#8221;). The excess development costs will accrue interest as specified in the GSK Agreement and will later either be repaid by the Company or offset against future regulatory and sales milestones or royalty payments that may become due to the Company. If the Company exercises its Profit Share Election, the cap on the Company&#8217;s share of development costs shall no longer apply, and the Company must pay any then-outstanding excess plus accrued interest costs. Additionally, if the Company exercises its Profit Share Election, it may also simultaneously elect to co-promote any Licensed Products in the United States.    </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Pursuant to the GSK Agreement, GSK paid the Company a non-refundable, upfront fee of $100.0&#160;million in August 2022. Following the GSK Option Exercise, if any, GSK is obligated to pay the Company an option exercise payment of $90.0&#160;million (the "Option Payment"). The Company is eligible to receive future development, regulatory, and commercial milestone payments up to approximately $1.3&#160;billion and, if the Company does not exercise its Profit Share Election, tiered royalties up to the mid-twenty percent range based on global sales of Licensed Products. Included in the aggregate milestone payments amount is $30&#160;million that the Company is eligible to earn upon the satisfaction of early clinical development milestones that may occur prior to the GSK Option Exercise. If the Company exercises its Profit Share Election, the Company will be eligible to receive reduced development, regulatory, and commercial milestone payments and reduced royalty rates on sales outside of the United States. Whether or not the Company exercises its Profit Share Election, GSK will be responsible for certain milestone payments or royalties due to specified third parties with which the Company currently has agreements that relate to the XMT-2056 program.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The GSK Agreement will terminate at the end of the Option Period if GSK does not exercise its Option. In the event of the GSK Option Exercise, unless earlier terminated, the GSK Agreement will continue in effect until the date on </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">which the royalty term and all payment obligations with respect to all Licensed Products in all countries have expired.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Accounting Analysis</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company assessed the GSK Agreement in accordance with ASC 606, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Revenue from Contracts with Customers</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, and concluded that the contract counterparty, GSK, is a customer. The Company identified the following two material performance obligations under the GSK Agreement: (i) development activities, including manufacturing, research and early clinical development activities, necessary to deliver the package of data, information and materials specified in the GSK agreement (the "Development Activities") and (ii) the Option to co-develop and to commercialize Licensed Products (the "License Option"). </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company concluded that the Development Activities are one distinct performance obligation, as the underlying activities are not distinguishable in the context of the contract and are inputs to an integrated development program that will generate data and information providing value to GSK in determining whether to exercise the Option. The License Option is considered a material right as the value of the license exceeds the Option Payment, and is therefore a distinct performance obligation.  </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In accordance with ASC 606, the Company determined that the initial transaction price under the GSK Agreement equals $100.0&#160;million, consisting of the upfront, non-refundable and non-creditable payment paid by GSK. None of the early clinical development milestones that may occur prior to the GSK Option Exercise have been included in the initial transaction price, as all milestone amounts were fully constrained. As part of its evaluation of the constraint, the Company considered numerous factors, including stage of development and the remaining risks associated with the development required to achieve the milestones, as well as whether the achievement of the milestones is outside the control of the Company or GSK. At the end of each subsequent reporting period, the Company will re-evaluate the probability of achievement and any related constraint and, if necessary, adjust its estimate of the overall transaction price. Any such adjustments will be recorded on a cumulative catch-up basis, which would affect the reported amount of revenues in the period of adjustment. The GSK Option payment is excluded from the initial transaction price at contract inception along with any future development, regulatory, and commercial milestone payments (including royalties) following the GSK Option Exercise. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Consistent with the allocation objective under ASC 606, the Company allocated the $100.0&#160;million fixed upfront payment in the transaction price to the Development Activities and the License Option based on each performance obligation&#8217;s relative standalone selling price. The standalone selling price for the Development Activities was calculated using a cost-plus margin approach for the estimated pre-option development timeline. For the standalone selling price of the License Option, the Company utilized an income-based approach which included the following key assumptions: post-option development timeline and costs, revenue forecast, discount rates and probabilities of technical and regulatory success. </span></div><div style="margin-bottom:12pt"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company is recognizing revenue related to the Development Activities performance obligation over the estimated period of the pre-option development using a</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> proportional performance model as the underlying activities are performed. Th</span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">e C</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">ompany measures proportional performance based on the costs incurred relative to the total costs expected to be incurred. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company will defer revenue recognition related to the License Option. If the License Option is exercised and GSK obtains an exclusive license, the Company will recognize revenue as it fulfills its obligations under the GSK Agreement. If the Option is not exercised, the Company will recognize the entirety of the revenue in the period when the Option expires.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During the three and nine months ended September&#160;30, 2022, the Company recorded collaboration revenue of $0.7&#160;million related to its efforts under the GSK Agreement. As of September&#160;30, 2022, the Company had recorded $99.3&#160;million in deferred revenue related to the unsatisfied performance obligations under the GSK Agreement. This deferred revenue will be recognized over the remaining performance period and classified as current or noncurrent on the consolidated balance sheets.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Summary of Contract Assets and Liabilities</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company did not record any contract assets as of September&#160;30, 2022 related to the GSK Agreement. The following table presents changes in the balances of the Company's contract liabilities related to the GSK Agreement during the nine months ended September&#160;30, 2022:</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"><tr><td style="width:1.0%"/><td style="width:45.127%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.744%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>Beginning<br/>of Period</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Additions</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Deductions</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>End of Period</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Nine months ended September 30, 2022</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Contract liabilities:</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Deferred revenue</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">100,000&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">655&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">99,345&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During the three and nine months ended September&#160;30, 2022, the Company recognized the following revenues related to the GSK Agreement as a result of changes in the contract liability balances in the respective periods:</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:63.803%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:16.047%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:16.049%"/><td style="width:0.1%"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three Months Ended<br/>September 30,</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended<br/>September 30,</span></td><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Revenue recognized in the period from:</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Amounts included in the contract liability at the beginning of the period</span></td><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Performance obligations satisfied in previous periods</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Janssen Biotech Inc.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In February 2022, the Company entered into a research collaboration and license agreement with Janssen Biotech Inc. ("Janssen" and such agreement, the "Janssen Agreement") focused on the research, development and commercialization of novel ADCs for three oncology targets by leveraging Mersana&#8217;s ADC expertise and Dolasynthen platform with Janssen&#8217;s proprietary antibodies. Upon execution of the Janssen Agreement, the Company received a non-refundable upfront payment of $40.0&#160;million from Janssen. Pursuant to the Janssen Agreement, the Company granted Janssen two exclusive, non-transferrable, worldwide licenses - the Research License and the Commercialization License (together, the "Licenses"). The Research License provides Janssen, on a target-by-target basis, rights under the Company&#8217;s technology and the Company&#8217;s interest in the technology developed jointly through the collaboration solely to conduct Janssen&#8217;s activities under the research and Chemistry, Manufacturing and Controls ("CMC") plans with respect to each target. The Commercialization License is a royalty-bearing license granted on a target-by-target basis under the Company&#8217;s technology and the Company&#8217;s interest in the technology developed jointly through the collaboration to develop, manufacture, commercialize and otherwise exploit licensed ADCs and any licensed products containing licensed ADCs directed toward a target. Janssen may select up to three targets and may substitute each target once prior to a substitution deadline. Janssen is not required to pay a fee for its first substitution right, but must pay a one-time fee for access to the subsequent substitution rights following its exercise of its second substitution right.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Pursuant to mutually agreed research and CMC plans, the Company will perform bioconjugation, production development, preclinical manufacturing, and certain related research and preclinical development activities, in order to progress the targets through investigational new drug application ("IND") submission for further development, manufacture and commercialization by Janssen. Janssen will have sole responsibility for IND-enabling studies, IND submission, clinical development, regulatory activities and commercialization of the licensed ADCs. Both the Company and Janssen will have equal representation on a Joint Research Committee and Joint Manufacturing Committee to oversee the research and CMC activities. The Company estimates that its activities under the research plans for the targets will be performed through 2024. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company's CMC activities will be compensated by Janssen at agreed upon rates. Assuming successful development and commercialization of all three targets by Janssen, the Company could receive up to an additional $505&#160;million in development and regulatory milestones and $530&#160;million in sales milestones as well as tiered mid single-digit to low double-digit royalties on aggregate net sales of the ADC products. To date, the Company has not achieved any of the specified milestones. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Unless earlier terminated, the Janssen Agreement will expire upon the expiration of the last royalty term for a product under the Janssen Agreement. The Janssen Agreement contains customary provisions for termination by either party, including in the event of breach of the Janssen Agreement, subject to cure, by Janssen for convenience and by Mersana upon a challenge of the licensed patents, and customary provisions regarding the effects of termination. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Janssen may request that the Company perform clinical manufacturing services under a separate clinical supply agreement. Janssen may also request that the Company perform a technology transfer of bioconjugation and manufacturing process technology, at Janssen's cost, at an agreed upon rate.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Accounting Analysis</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company assessed the Janssen Agreement in accordance with ASC 606 and concluded that the contract counter party, Janssen, is a customer. The Company identified the following seven material performance obligations under the Janssen Agreement: (i) exclusive Licenses and research activities for each of the three designated targets, (ii) CMC activities for each of the three designated targets and (iii) the first target substitution right.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company concluded that the Licenses and research activities are one combined performance obligation for each target as the Licenses are not capable of being distinct from the research activities given their proprietary nature. The CMC activities are considered a distinct performance obligation for each target as the activities could be performed by a third-party provider. The first target substitution right is considered a material right as there is no option exercise fee and, as such, is a distinct performance obligation.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In accordance with ASC 606, the Company determined that the initial transaction price under the Janssen Agreement equals $40.0&#160;million, consisting of the upfront, non-refundable and non-creditable payment. None of the development and the regulatory milestones have been included in the transaction price, as all milestone amounts were fully constrained. As part of its evaluation of the constraint, the Company considered numerous factors, including stage of development and the remaining risks associated with the development required to achieve the milestones, as well as whether the achievement of the milestones is outside the control of the Company or Janssen. Any consideration related to sales-based milestones (including royalties) will be recognized when the related sales occur as such milestones were determined to relate predominantly to the license granted to Janssen and therefore have also been excluded from the transaction price. At the end of each subsequent reporting period, the Company will re-evaluate the probability of achievement of each milestone and any related constraint and, if necessary, adjust its estimate of the overall transaction price. Any such adjustments are recorded on a cumulative catch-up basis, which would affect the reported amount of revenues in the period of adjustment.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company determined that the consideration for CMC activities represents variable consideration. The Company has not included potential cost reimbursements within the transaction price as no CMC activities for any of the three targets have been initiated. The Company elected to apply the Right to Invoice practical expedient under ASC 606. As such, the Company will recognize revenue related to the CMC activities when the services are performed.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Consistent with the allocation objective under ASC 606, the Company allocated the $40.0&#160;million fixed upfront payment in the transaction price to the Licenses and research activities and first substitution right based on each performance obligation&#8217;s relative standalone selling price. Each of the standalone selling prices for the Licenses and research activities and for the first substitution right were estimated utilizing an income approach, along with the likelihood of exercise for the substitution right and included the following key assumptions: the development timeline, revenue forecast, discount rate and probabilities of technical and regulatory success. </span></div><div style="margin-bottom:12pt"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company is recognizing revenue related to the Licenses and research services performance obligation over the estimated period of the research services using a proportional performance model. The Company measures proportional performance based on the costs incurred relative to the total costs expected to be incurred. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company will recognize revenue related to the first target substitution right over time in congruence with the Licenses and research activities, upon the exercise of the option. If the first target substitution option is not exercised, the Company will recognize the entirety of the revenue in the period when the option expires.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During the three and nine months ended September&#160;30, 2022, the Company recorded collaboration revenue of $4.9&#160;million and $10.9&#160;million, respectively, related to its efforts under the Janssen Agreement. As of September&#160;30, 2022, the Company had recorded $29.1&#160;million in deferred revenue related to the Janssen Agreement that will be recognized over the remaining performance period and classified as current or noncurrent on the consolidated balance sheets based upon the expected timing of satisfaction of respective performance obligations. The aggregate amount of the transaction price allocated to unsatisfied performance obligations was $29.1&#160;million as of September&#160;30, 2022, which is expected to be recognized over the period the associated research activities are performed for each target.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Summary of Contract Assets and Liabilities</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company did not record any contract assets as of September&#160;30, 2022 related to the Janssen Agreement. The following table presents changes in the balances of the Company's contract liabilities related to the Janssen Agreement during the nine months ended September&#160;30, 2022:</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"><tr><td style="width:1.0%"/><td style="width:45.127%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.744%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>Beginning<br/>of Period</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Additions</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Deductions</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>End of Period</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Nine months ended September 30, 2022</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Contract liabilities:</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Deferred revenue</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">40,000&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">10,916&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">29,084&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During the three and nine months ended September&#160;30, 2022, the Company recognized the following revenues related to the Janssen Agreement as a result of changes in the contract liability balances in the respective periods:</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:63.803%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:16.047%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:16.049%"/><td style="width:0.1%"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three Months Ended<br/>September 30,</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended<br/>September 30,</span></td><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Revenue recognized in the period from:</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Amounts included in the contract liability at the beginning of the period</span></td><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">4,908&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Performance obligations satisfied in previous periods</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Merck KGaA</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In June 2014, the Company entered into a collaboration and commercial license agreement with Merck KGaA (the "Merck KGaA Agreement"). Upon the execution of the Merck KGaA Agreement, Merck KGaA paid the Company a non-refundable technology access fee of $12.0 million for the right to develop ADCs directed to six exclusive targets over a specified period of time. No additional fees are due when a target is designated and the commercial license to the target is granted. Merck KGaA will be responsible for the product development and marketing of any products resulting from this collaboration.&#160;</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Under the terms of the Merck KGaA Agreement, the Company and Merck KGaA develop research plans to evaluate Merck KGaA's antibodies as ADCs incorporating the Company's technology. The Company receives reimbursement for its efforts under the research plans. The goal of the research plans is to provide Merck KGaA with sufficient information to formally nominate a development candidate and begin IND-enabling studies.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">All six targets were designated prior to 2018. The next potential milestone payment that the Company is eligible to receive is a development milestone of $0.5 million on Merck KGaA&#8217;s designation of a preclinical development candidate for a target. Revenue will be recognized when achievement of the milestone is considered probable.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In May 2018, the Company entered into a supply agreement with Merck KGaA (the "Merck KGaA Supply Agreement"). Under the terms of the Merck KGaA Supply Agreement, the Company will provide Merck KGaA preclinical non-good manufacturing practice ("non-GMP") ADC drug substance and clinical good manufacturing practice ("GMP") drug substance for use in clinical trials associated with one of the antibodies designated under the Merck KGaA Agreement. The Company receives fees for its efforts under the Merck KGaA Supply Agreement and reimbursement equal to the supply cost. The Company may also enter into future supply agreements to provide clinical supply material should Merck KGaA pursue clinical development of any other candidates nominated under the Merck KGaA Agreement.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Accounting Analysis</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company concluded that Merck KGaA is a customer and accounted for the Merck KGaA Agreement in accordance with ASC 606. The Company identified the following performance obligations under the Merck KGaA Agreement: (i) exclusive license and research services for six designated targets, (ii) rights to future technological improvements and (iii) participation of project team leaders and providing joint research committee services.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company is recognizing revenue related to the exclusive license and research and development services performance obligations over the estimated period of the research and development services using a proportional performance model. The Company measures proportional performance based on the costs incurred relative to the total costs expected to be incurred. To the extent that the Company receives fees for the research services as they are performed, these amounts are recorded as deferred revenue. Revenue related to future technological improvements and joint research committee services will be recognized ratably over the respective performance period (which in the case of the joint research committee services approximate the time and cost incurred each period), which are 10 and 5 years, respectively.&#160;The Company is continuing to reassess the estimated remaining term at each subsequent reporting period.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of September&#160;30, 2022, the Company had completed its research service obligations associated with four of the six designated targets. The Company did not recognize any corresponding research and development expense related to the Merck KGaA Supply Agreement during the three and nine months ended September&#160;30, 2022 and 2021. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of September&#160;30, 2022 and December&#160;31, 2021, the Company had $3.9 million in deferred revenue related to the Merck KGaA Agreement and Merck KGaA Supply Agreement. Such amounts will be recognized over the remaining performance period. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Summary of Contract Assets and Liabilities</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company did not record any contract assets as of September&#160;30, 2022 and December&#160;31, 2021. The following table presents changes in the balances of the Company's contract liabilities related to the Merck KGaA Agreement and Merck KGaA Supply Agreement during the nine months ended September&#160;30, 2022 and 2021:</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"><tr><td style="width:1.0%"/><td style="width:45.127%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.744%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>Beginning<br/>of Period</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Additions</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Deductions</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>End of Period</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Nine months ended September 30, 2022</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Contract liabilities:</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Deferred revenue</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3,944&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">32&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3,912&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"><tr><td style="width:1.0%"/><td style="width:45.127%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.744%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>Beginning<br/>of Period</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Additions</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Deductions</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>End of Period</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Nine months ended September 30, 2021</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Contract liabilities:</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Deferred revenue</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3,987&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">32&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3,955&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During the three and nine months ended September&#160;30, 2022 and 2021, the Company recognized the following revenues related to the Merck KGaA Agreement and Merck KGaA Supply Agreement as a result of changes in the contract liability balances in the respective periods:</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:45.214%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.720%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.720%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.720%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.723%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three Months Ended<br/>September 30,</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended<br/>September 30,</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Revenue recognized in the period from:</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Amounts included in the contract liability at the beginning of the period</span></td><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">11&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">11&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">32&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">32&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Performance obligations satisfied in previous periods</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Other Revenue</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company has provided limited services for a collaboration partner, Asana BioSciences, LLC ("Asana Biosciences"). During the nine months ended September&#160;30, 2022, the Company recognized revenue of $0.3 million related to these services and did not recognize revenue related to these services during the three months ended September 30, 2022 or during the three and nine months ended September&#160;30, 2021. The next potential milestone the Company is eligible to receive is $2.5 million upon dosing the fifth patient in a Phase 1 clinical trial by Asana BioSciences. While the first patient was dosed in April 2022, as of September&#160;30, 2022, the Company considers this next milestone to be fully constrained as there is considerable judgment involved in determining whether it is probable that a significant revenue reversal would occur. As part of its evaluation of the constraint, the Company considered numerous factors, including the fact that achievement of the milestone is outside the control of the Company and there is a high level of uncertainty in achieving this milestone, as the collaboration partner continues to evaluate its candidate in the Phase 1 trial. The Company reevaluates the probability of achievement of a milestone subject to constraint at each reporting period and as uncertain events are resolved or other changes in circumstances occur.</span></div><span></span>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The entire disclosure for collaborative arrangements in which the entity is a participant, including a) information about the nature and purpose of such arrangements; b) its rights and obligations thereunder; c) the accounting policy for collaborative arrangements; and d) the income statement classification and amounts attributable to transactions arising from the collaborative arrangement between participants.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 808<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=6931272&amp;loc=SL5834143-161434<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 808<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=6931272&amp;loc=SL5834143-161434<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 808<br> -URI https://asc.fasb.org/topic&amp;trid=5833765<br></p></div>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031725981744">
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<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Fair value measurements<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
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<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FairValueDisclosuresAbstract', window );"><strong>Fair Value Disclosures [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FairValueMeasurementInputsDisclosureTextBlock', window );">Fair value measurements</a></td>
<td class="text">Fair value measurements<div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table presents information about the Company's assets measured at fair value on a recurring basis and indicates the level within fair value hierarchy of the valuation techniques utilized to determine such value. The Company had no marketable securities as of December&#160;31, 2021.</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:98.076%"><tr><td style="width:1.0%"/><td style="width:46.612%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.971%"/><td style="width:0.1%"/><td colspan="3" style="display:none"/><td style="width:1.0%"/><td style="width:11.971%"/><td style="width:0.1%"/><td colspan="3" style="display:none"/><td style="width:1.0%"/><td style="width:11.971%"/><td style="width:0.1%"/><td colspan="3" style="display:none"/><td style="width:1.0%"/><td style="width:11.975%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="12" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30, 2022</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Total</span></td><td colspan="3" style="display:none"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Quoted&#160;Prices<br/>in&#160;Active<br/>Markets<br/>(Level&#160;1)</span></td><td colspan="3" style="display:none"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Significant<br/>Other<br/>Observable<br/>Inputs<br/>(Level&#160;2)</span></td><td colspan="3" style="display:none"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Significant<br/>Unobservable<br/>Inputs<br/>(Level&#160;3)</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Cash equivalents</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Money market funds</span></td><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">29,509&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">29,509&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Marketable securities</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">U.S. treasury securities</span></td><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">101,118&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">101,118&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">U.S. government agency securities</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">4,926&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">4,926&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The money market funds noted above are included in cash and cash equivalents in the accompanying condensed consolidated balance sheets. There were no changes in valuation techniques or transfers between fair value measurement levels during the nine months ended September&#160;30, 2022.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Marketable securities classified as Level 1 within the valuation hierarchy generally consists of U.S. treasury securities, as the fair value is readily determinable based on active daily markets for identical securities. Marketable securities classified as Level 2 within the valuation hierarchy generally consists of U.S. government agency securities, as the fair value is readily determinable based on active daily markets for similar securities and other observable inputs. The Company estimates the fair values of marketable securities by taking into consideration valuations obtained from third-party pricing sources. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The carrying amounts reflected in the consolidated balance sheets for</span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> prepaid expenses and other current assets, accounts payable and accrued expenses approximate their fair values due to their short-term nature.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of September&#160;30, 2022 and December&#160;31, 2021, the carrying value of the Company&#8217;s outstanding borrowing under the New Credit Facility (as defined in Note 7) approximated fair value (a Level 2 fair value measurement), reflecting interest rates currently available to the Company. The New Credit Facility is discussed in more detail in Note 7, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Debt</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">.</span></div><span></span>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The entire disclosure of the fair value measurement of assets and liabilities, which includes financial instruments measured at fair value that are classified in shareholders' equity, which may be measured on a recurring or nonrecurring basis.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 820<br> -URI https://asc.fasb.org/topic&amp;trid=2155941<br></p></div>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031642191408">
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<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Cash, cash equivalents, and short-term marketable securities<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
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<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract', window );"><strong>Investments, Debt and Equity Securities [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CashCashEquivalentsAndMarketableSecuritiesTextBlock', window );">Cash, cash equivalents, and short-term marketable securities</a></td>
<td class="text">Cash, cash equivalents, and short-term marketable securities<div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Cash and cash equivalents</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table summarizes the Company's cash, cash equivalents, and restricted cash as of September&#160;30, 2022 and 2021.</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"><tr><td style="width:1.0%"/><td style="width:45.127%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.744%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended<br/>September 30, 2022</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended<br/>September 30, 2021</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Beginning<br/>of period</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">End<br/>of period</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Beginning<br/>of period</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">End<br/>of period</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Cash and cash equivalents</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">177,947&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">184,082&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">255,094&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">191,707&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Restricted cash included in other assets, noncurrent</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">478&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">478&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">321&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">478&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total cash, cash equivalents and restricted cash per statement of cash flows</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">178,425&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">184,560&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">255,415&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">192,185&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Marketable securities</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table summarizes the Company's marketable securities held at September&#160;30, 2022. </span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company had no marketable securities as of</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> December&#160;31, 2021.</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"><tr><td style="width:1.0%"/><td style="width:45.127%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.744%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="21" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30, 2022</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Amortized<br/>Cost</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Gross<br/>Unrealized<br/>Gains</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Gross<br/>Unrealized<br/>Losses</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Fair<br/>Value</span></td></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Marketable securities</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">U.S. treasury securities</span></td><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">101,342&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">4&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(228)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">101,118&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">U.S. government agency securities</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">4,933&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(7)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">4,926&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">All of the Company's marketable securities are due within one year or less. The Company did not realize any gains or losses recognized on the sale or maturity of marketable securities during the nine months ended September&#160;30, 2022, and, as a result, the Company did not reclassify any amounts out of accumulated comprehensive loss.</span></div>As of September&#160;30, 2022, the Company's debt security portfolio consisted of 23 securities that were in an unrealized loss position and had an aggregate fair value of $96.1&#160;million. There were no securities in an unrealized loss position for greater than 12 months as of September&#160;30, 2022.  The unrealized losses on the Company's marketable securities were caused by market interest rate increases. The Company has the intent and ability to hold such securities until recovery. As a result, the Company did not record any charges for credit-related impairments for its marketable debt securities for the nine months ended as of September&#160;30, 2022.<span></span>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The entire disclosure of cash, cash equivalents, and debt and equity securities, including any unrealized or realized gain (loss).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 320<br> -URI https://asc.fasb.org/topic&amp;trid=2196928<br></p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031726699968">
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<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Accrued expenses<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
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<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AccruedLiabilitiesCurrentAbstract', window );"><strong>Accrued Liabilities, Current [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
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<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock', window );">Accrued expenses</a></td>
<td class="text">Accrued expenses<div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Accrued expenses consisted of the following as of September&#160;30, 2022 and December&#160;31, 2021:</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:70.214%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.842%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.843%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30,<br/>2022</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">December 31,<br/>2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accrued manufacturing expenses</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">13,230&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">8,476&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accrued clinical expenses</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">10,972&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">7,879&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accrued research and non-clinical expenses</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">5,811&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3,848&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accrued payroll and related expenses</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">9,083&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">7,319&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accrued professional fees</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">1,822&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">909&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accrued other</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">286&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">285&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">41,204&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">28,716&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><span></span>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The entire disclosure for accounts payable and accrued liabilities at the end of the reporting period.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.19(a),20,24)<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031642335024">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Debt<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
</tr>
<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtDisclosureAbstract', window );"><strong>Debt Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtDisclosureTextBlock', window );">Debt</a></td>
<td class="text">Debt<div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">On May 8, 2019, the Company entered into a loan and security agreement (the "Prior Credit Facility") with Silicon Valley Bank ("SVB"), which was subsequently amended on June 29, 2019, August 28, 2020, and August 27, 2021. Refer to Note 7, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Debt,</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> in the Company&#8217;s Annual Report on Form 10-K for the year ended December 31, 2021 for more information regarding the Prior Credit Facility. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">On October 29, 2021, the Company entered into a loan and security agreement (the "New Credit Facility") with SVB and Oxford Finance, LLC ("Oxford" and, together with SVB, the "Lenders"). Pursuant to the New Credit Facility, as amended, the Company can borrow term loans in an aggregate amount of $100.0 million, which includes (i) $60.0 million in up to three principal advances through December 31, 2022, (ii) an additional $20.0 million in one principal advance, if the Company reaches certain development milestone events through June 30, 2023, (iii) and an additional tranche of $20.0 million, subject to conditional approval from the Lenders. The New Credit Facility is secured by substantially all of the Company's personal property owned or later acquired, excluding intellectual property (but including the rights to payments and proceeds from intellectual property), and a negative pledge on intellectual property. The Company drew $25.0 million upon execution of the New Credit Facility, of which $5.5 million of the proceeds was used to repay the existing balance under the Prior Credit Facility and satisfy its obligations to SVB. Upon entering into the New Credit Facility, the Company terminated all commitments by SVB to extend further credit under the Prior Credit Facility and all guarantees and security interests granted by the Company to SVB under the Prior Credit Facility.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Refer to Note 7, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Debt</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, in the Company&#8217;s Annual Report on Form 10-K for the year ended December 31, 2021 for more information regarding the New Credit Facility. As of September&#160;30, 2022, the Company was in compliance with all covenants under the New Credit Facility. There are no events of default as of September&#160;30, 2022.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Unamortized debt financing costs are recorded as a reduction of the carrying amount on the term loan and amortized as interest expense using the effective-interest method. Unamortized deferred financing costs of $0.1 million were recorded in other assets as of September&#160;30, 2022 related to the Company's right to borrow additional amounts from the Lenders in the future and amortized to interest expense over the relevant draw period on a straight-line basis.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following is a summary of obligations under the term loan as of September&#160;30, 2022:</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:84.957%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.843%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30,<br/>2022</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total debt</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">25,000&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Less: Current portion of long-term debt</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total debt, net of current portion</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">25,000&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Debt financing costs, net of accretion</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(345)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accretion related to final payment</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">198&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Long-term debt, net</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">24,853&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div>Interest expense related to the New Credit Facility for the three and nine months ended September&#160;30, 2022 was $0.8&#160;million and $2.3&#160;million, respectively. The Company did not recognize any interest expense related to the New Credit Facility during the three or nine months ended September 30, 2021.  Interest expense related to the Prior Credit Facility for the three and nine months ended September 30, 2021 was $0.1&#160;million and $0.3&#160;million, respectively.  The Company did not recognize any interest expense related to the Prior Credit Facility during the three or nine months ended September 30, 2022.<span></span>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.</p></div>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031642134688">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Stockholders' equity<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
</tr>
<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockholdersEquityNoteAbstract', window );"><strong>Stockholders' Equity Note [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockholdersEquityNoteDisclosureTextBlock', window );">Stockholders&#8217; equity</a></td>
<td class="text">Stockholders&#8217; equity <div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Preferred stock</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of September&#160;30, 2022, the Company had 25,000,000 shares of authorized preferred stock. No shares of preferred stock have been issued.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">At-the-market ("ATM") equity offering program</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In May 2020, the Company established an ATM equity offering program (the "2020 ATM"), pursuant to which it was able to offer and sell up to $100.0 million of its common stock from time to time at prevailing market prices. During the first quarter of 2022, the Company sold 11,740,210 shares of common stock and received net proceeds of $54.8 million under the 2020 ATM. As of March 31, 2022, the 2020 ATM had been fully utilized.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In February 2022, the Company established a new ATM equity offering program (the "2022 ATM"), pursuant to which it is able to offer and sell up to $100.0&#160;million of its common stock from time to time at prevailing market prices. During the nine months ended September&#160;30, 2022, the Company sold 12,717,288 shares of common stock and received net proceeds of $56.5 million under the 2022 ATM. As of September&#160;30, 2022, approximately $42.4&#160;million remained unsold and available for sale under the 2022 ATM.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Warrants</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In connection with a 2013 Series&#160;A-1 Preferred Stock issuance, the Company granted to certain investors warrants to purchase 129,491 shares of common stock. The warrants have a $0.05 per share exercise price and a contractual life of 10 years. The fair value of these warrants was recorded as a component of equity at the time of issuance. As of September&#160;30, 2022, there were warrants to purchase 22,590 shares of common stock outstanding. During the nine months ended September&#160;30, 2022, the Company issued 16,654 shares of common stock upon the exercise of warrants.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Common stock</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">At the 2022 Annual Meeting of Stockholders on June 9, 2022, the Company's stockholders approved an amendment to the Company&#8217;s Fifth Amended and Restated Certificate of Incorporation to increase the number of authorized shares of common stock, $0.0001 par value per share, from 175,000,000 to 350,000,000. This increase became effective upon filing of a Certificate of Amendment with the Secretary of State of Delaware on June 9, 2022. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The holders of the common stock are entitled to one vote for each share held. Common stockholders are not entitled to receive dividends, unless declared by the Board of Directors (the "Board").</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of September&#160;30, 2022 and December&#160;31, 2021, there were 12,418,052 and 9,199,512, respectively, shares of common stock reserved for the exercise of outstanding stock options, restricted stock units ("RSUs") and warrants.</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:70.214%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.842%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.843%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30,<br/>2022</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">December 31,<br/>2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Stock options</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">10,524,780&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">8,342,429&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Restricted stock units</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">1,870,682&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">817,609&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Warrants</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">22,590&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">39,474&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">12,418,052&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">9,199,512&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double 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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031642230720">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Stock-based compensation<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
</tr>
<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract', window );"><strong>Share-Based Payment Arrangement [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock', window );">Stock-based compensation</a></td>
<td class="text">Stock-based compensation<div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Stock incentive plans</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of June 30, 2017, there were 3,141,625 stock options outstanding under the Company&#8217;s 2007 Stock Incentive Plan (the "2007 Plan"). The 2007 Plan expired in June 2017. Any cancellations or forfeitures of options granted under the 2007 Plan will increase the options available under the 2017 Stock Incentive Plan (the "2017 Plan"), as described below.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In June 2017, the Company&#8217;s stockholders approved the 2017 Plan. Under the 2017 Plan initially, up to 2,255,000 shares of common stock could be granted to the Company's employees, officers, directors, consultants and advisors in the form of options, RSUs or other stock-based awards. The number of shares of common stock issuable under the 2017 Plan will be cumulatively increased annually on January 1 by the lesser of (a) 4% of the outstanding shares on the immediately preceding December 31 or (b) such other amount specified by the Board. The terms of the awards are determined by the Board, subject to the provisions of the 2017 Plan. Any cancellations or forfeitures of options granted under the 2007 Plan, which expired in June 2017, would increase the number of shares that could be granted under the 2017 Plan. On January 1, 2022, the number of shares of common stock issuable under the 2017 Plan was increased by 2,948,362 shares. As of September&#160;30, 2022, there were 1,372,006 shares available for future issuance under the 2017 Plan. During the nine months ended September&#160;30, 2022, the Company granted 3,532,433 RSUs and options to purchase shares of common stock to employees and non-employee directors under the 2017 Plan.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Under the 2017 Plan, both with respect to incentive stock options and nonqualified stock options, the exercise price per share will not be less than the fair market value of the common stock on the date of grant and the vesting period is generally four years. Options granted under the 2017 Plan expire no later than 10 years from the date of grant. Options under the 2007 Plan were granted at an exercise price established by the Board (or a committee thereof) that was not less than the fair market value of the underlying common stock on the date of grant and subject to such vesting provisions determined by the Board (or a committee thereof). The Board may accelerate vesting or otherwise adjust the terms of granted options in the case of a merger, consolidation, dissolution, or liquidation of the Company.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Inducement awards</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">From time to time, the Company grants to its employees, upon approval by the Board or an authorized committee thereof, options to purchase shares of common stock as an inducement to employment in accordance with Nasdaq Listing Rule 5635(c)(4). Prior to February 2022, these options were granted outside of an existing equity incentive plan. These options are subject to terms substantially the same as the 2017 Plan. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In February 2022, the Board adopted the Company's 2022 Inducement Stock Incentive Plan (the "Inducement Plan"), which provides for the grant of nonstatutory options, stock appreciation rights, restricted stock, RSUs and other stock-based awards, with respect to an aggregate of 2,000,000 shares of the Company's common stock (subject to adjustment as provided in the Inducement Plan). During the nine months ended September&#160;30, 2022, the Company granted 612,450 RSUs and options to purchase shares of common stock to newly hired employees under the Inducement Plan. As of September&#160;30, 2022, there were 1,403,975 shares available for future issuance under the Inducement Plan. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of September&#160;30, 2022, there were 757,500 options to purchase shares of common stock outstanding which were granted as inducement awards prior to the establishment of the Inducement Plan.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Stock option activity</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">A summary of stock option activity is as follows:</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:70.214%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.842%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.843%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Number<br/>of&#160;Shares</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Weighted-<br/>Average<br/>Exercise&#160;Price</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Outstanding at January&#160;1, 2022</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">8,342,429&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">11.25&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Granted</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2,765,034&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">5.41&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Exercised</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(54,299)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3.81&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Cancelled</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(528,384)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">13.33&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Outstanding at September&#160;30,&#160;2022</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">10,524,780&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">9.65&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Vested and expected to vest at September 30, 2022</span></td><td colspan="2" style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">10,524,780&#160;</span></td><td style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">9.65&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Exercisable at September&#160;30,&#160;2022</span></td><td colspan="2" style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:3pt double #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">5,339,351&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:3pt double #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">8.96&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The weighted-average grant date fair value of options granted during the nine months ended September&#160;30, 2022 and 2021 was $3.96 and $12.37 per share, respectively. The total intrinsic value of options exercised during the nine months ended September&#160;30, 2022 and 2021 was $0.1&#160;million and $3.9&#160;million, respectively. The aggregate intrinsic value represents the difference between the exercise price and the selling price received by option holders upon the exercise of stock options during the period.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Cash received from the exercise of stock options was $0.2 million and $1.5 million for the nine months ended September&#160;30, 2022 and 2021, respectively.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Restricted stock units</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company periodically issues RSUs with a service condition to certain officers and other employees that typically vest between one year and four years from the grant date.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">A summary of the RSU activity is as follows:</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:84.957%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.843%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Number of Shares</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Unvested at January&#160;1, 2022</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">817,609&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Granted</span></td><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">1,379,849&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Vested</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(190,841)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Forfeited</span></td><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(135,935)</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Unvested at September&#160;30,&#160;2022</span></td><td colspan="2" style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">1,870,682&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Stock-based compensation expense</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company uses the provisions of ASC 718, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Stock Compensation</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, to account for all stock-based awards to employees and non-employees.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Stock-based compensation expense is recognized over the requisite service period, which is generally the vesting period, using the straight-line method.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table presents stock-based compensation expense by award type included within the Company&#8217;s condensed consolidated statements of operations and comprehensive loss:</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:45.694%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.720%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.441%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.720%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.441%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.720%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.441%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.723%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three Months Ended September 30,</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended September 30,</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Stock options</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3,901&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3,986&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">11,952&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">10,617&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Restricted stock units</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">1,365&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">881&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3,832&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2,636&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Employee stock purchase plan</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">109&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">61&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">424&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">296&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Stock-based compensation expense included in total operating expenses</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">5,375&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">4,928&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">16,208&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">13,549&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table presents stock-based compensation expense as reflected in the Company&#8217;s condensed consolidated statements of operations and comprehensive loss:</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:45.534%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.720%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.720%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.441%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.720%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.441%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.723%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three Months Ended September 30,</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended September 30,</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Research and development</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2,890&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2,607&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">8,569&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">7,410&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">General and administrative</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2,485&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2,321&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">7,639&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">6,139&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Stock-based compensation expense included in total operating expenses</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">5,375&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">4,928&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">16,208&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">13,549&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of September&#160;30, 2022, there was $34.5 million and $12.6 million of unrecognized stock-based compensation expense related to unvested stock options and unvested RSUs, respectively, that is expected to be recognized over a weighted-average period of 2.2 years and 2.8 years, respectively.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The fair value of each option award is estimated on the date of grant using the Black-Scholes option pricing model with the following weighted average assumptions:</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:47.457%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.560%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.560%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.441%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.560%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.441%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:10.280%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three Months Ended<br/>September 30,</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended September 30,</span></td></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Risk-free interest rate</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2.9&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">1.0&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2.0&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">0.8&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Expected dividend yield</span></td><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Expected term (years)</span></td><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">6.11</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">6.11</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">5.99</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">6.05</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Expected stock price volatility</span></td><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">94&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">82&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">88&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">83&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Expected volatility for the Company&#8217;s common stock is determined based on the historical volatility of comparable publicly traded companies. The risk-free interest rate is based on the yield of U.S. Treasury securities consistent with the expected term of the option. No dividend yield was assumed as the Company has not historically and does not expect to pay dividends on its common stock. The expected term of the options granted is based on the use of the simplified method, in which the expected term is presumed to be the mid-point between the vesting date and the end of the contractual term.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The fair value of RSUs is determined based on the closing price of the Company&#8217;s common stock on the date of grant.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Employee stock purchase plan</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During the year ended December 31, 2017, the Board adopted, and the Company&#8217;s stockholders approved the 2017 employee stock purchase plan (the "2017 ESPP"). The Company issued 154,235 shares under the 2017 ESPP during the nine months ended September&#160;30, 2022 and issued 36,198 shares under the 2017 ESPP during the nine months ended September&#160;30, 2021. As of September&#160;30, 2022, there were 412,330 shares available for issuance under the 2017 ESPP.</span></div><span></span>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031642335024">
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<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Net loss per share<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
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<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EarningsPerShareAbstract', window );"><strong>Earnings Per Share [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EarningsPerShareTextBlock', window );">Net loss per share</a></td>
<td class="text">Net loss per share<div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Basic net loss per share of common stock is calculated by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period, without further consideration for potentially dilutive securities. Diluted net loss per share is computed by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock and potentially dilutive securities outstanding for the period determined using the treasury stock method.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">For purposes of the diluted net loss per share calculation, stock options, unvested RSUs and warrants to purchase common stock are considered to be potentially dilutive securities, but are excluded from the calculation of diluted net loss per share because their effect would be anti-dilutive and therefore, basic and diluted net loss per share were the same for all periods presented. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table sets forth the outstanding potentially dilutive securities that have been excluded from the calculation of diluted net loss per share because to include them would be anti-dilutive (in common stock equivalent shares):</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:49.220%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:23.419%"/><td style="width:0.1%"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td style="width:0.1%"/><td style="width:0.441%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:23.420%"/><td style="width:0.1%"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three and Nine Months Ended<br/>September 30, 2022</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three and Nine Months Ended<br/>September 30, 2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Stock options</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">10,524,780&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">8,215,549&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Unvested restricted stock units</span></td><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">1,870,682&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">800,466&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Warrants</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">22,590&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">39,474&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">12,418,052&#160;</span></td><td style="border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">9,055,489&#160;</span></td><td style="border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr></table></div><span></span>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The entire disclosure for earnings per share.</p></div>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031645967440">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Commitments<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
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<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CommitmentsAndContingenciesDisclosureAbstract', window );"><strong>Commitments and Contingencies Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CommitmentsDisclosureTextBlock', window );">Commitments</a></td>
<td class="text">Commitments<div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">License agreements</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During the three months ended September 30, 2022 and the three and nine months ended September 30, 2021, the Company did not record research and development expense related to non-refundable license payments. During the nine months ended September&#160;30, 2022, the Company recorded research and development expense related to non-refundable license payments of $1.5&#160;million. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During the three and nine months ended September&#160;30, 2022, the Company recorded research and development expense related to development milestones of $0.7&#160;million related to development milestones associated with XMT-1660. During the three and nine months ended September&#160;30, 2021, the Company recorded research and development expense of $1.2&#160;million and $2.1&#160;million, respectively, related to development milestones associated with UpRi.</span></div><span></span>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The entire disclosure for significant arrangements with third parties, which includes operating lease arrangements and arrangements in which the entity has agreed to expend funds to procure goods or services, or has agreed to commit resources to supply goods or services, and operating lease arrangements. Descriptions may include identification of the specific goods and services, period of time covered, minimum quantities and amounts, and cancellation rights.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 440<br> -URI https://asc.fasb.org/topic&amp;trid=2144648<br></p></div>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031640619904">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Summary of significant accounting policies (Policies)<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
</tr>
<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AccountingPoliciesAbstract', window );"><strong>Accounting Policies [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
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<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ConsolidationPolicyTextBlock', window );">Principles of Consolidation</a></td>
<td class="text"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Principles of Consolidation</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The accompanying unaudited condensed consolidated financial statements include those of the Company and its wholly owned subsidiary, Mersana Securities Corp. All intercompany balances and transactions have been eliminated.</span></div><span></span>
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<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_UseOfEstimates', window );">Use of Estimates</a></td>
<td class="text"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of the Company&#8217;s unaudited condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, equity, revenue, expenses and related disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenue and expenses during the reporting period. On an ongoing basis, the Company&#8217;s management evaluates its estimates which include, but are not limited to, management&#8217;s judgments with respect to the identification of performance obligations and standalone selling prices of those performance obligations within its revenue arrangements, accrued preclinical, manufacturing and clinical expenses, valuation of stock-based awards and income taxes. Actual results could differ from those estimates.</span></div><span></span>
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<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SegmentReportingPolicyPolicyTextBlock', window );">Segment Information</a></td>
<td class="text"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Segment Information</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Operating segments are defined as components of an enterprise about which separate discrete information is available for evaluation by the chief operating decision-maker, or decision making group, in deciding how to allocate resources and assess performance. The Company views its operations and manages its business as a single operating segment, which is the business of discovering and developing ADCs.</span></div><span></span>
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<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FairValueMeasurementPolicyPolicyTextBlock', window );">Fair Value Measurements</a></td>
<td class="text"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Fair Value Measurements</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Fair value is defined as the price that would be received upon sale of an asset or paid to transfer a liability between market participants at measurement dates. ASC&#160;820,&#160;</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Fair Value Measurement,</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> establishes a three-level valuation hierarchy for instruments measured at fair value. The hierarchy is based on the transparency of inputs to the valuation of an asset or liability as of the measurement date. The three levels are defined as follows:</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Level&#160;1&#8212;Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Level&#160;2&#8212;Inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Level&#160;3&#8212;Inputs to the valuation methodology are unobservable and significant to the fair value measurement.</span></div><span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ConcentrationRiskCreditRisk', window );">Concentration Risk, Credit Risk, Policy</a></td>
<td class="text">Concentration of Credit Risk and Off-balance Sheet RiskFinancial instruments that potentially subject the Company to concentrations of credit risk primarily consist of cash equivalents and marketable securities. Under its investment policy, the Company limits amounts invested in such securities by credit rating, maturity, industry group, investment type and issuer, except for securities issued by the U.S. government. The Company does not believe that it is subject to any significant concentrations of credit risk from these financial instruments. The Company has no financial instruments with off-balance sheet risk, such as foreign exchange contracts, option contracts, or other foreign hedging arrangements.<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_OffBalanceSheetCreditExposurePolicyPolicyTextBlock', window );">Off-Balance-Sheet Credit Exposure, Policy</a></td>
<td class="text">Concentration of Credit Risk and Off-balance Sheet RiskFinancial instruments that potentially subject the Company to concentrations of credit risk primarily consist of cash equivalents and marketable securities. Under its investment policy, the Company limits amounts invested in such securities by credit rating, maturity, industry group, investment type and issuer, except for securities issued by the U.S. government. The Company does not believe that it is subject to any significant concentrations of credit risk from these financial instruments. The Company has no financial instruments with off-balance sheet risk, such as foreign exchange contracts, option contracts, or other foreign hedging arrangements.<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_MarketableSecuritiesPolicy', window );">Marketable Securities</a></td>
<td class="text"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Marketable Securities</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company&#8217;s investment strategy is focused on capital preservation. The Company invests in instruments that meet the credit quality standards outlined in the Company&#8217;s investment policy. Short-term marketable securities consist of investments in debt securities with maturities greater than three months and less than one year from the balance sheet date. The Company classifies all of its marketable securities as available-for-sale. Accordingly, these investments are recorded at fair value. Fair value is determined based on quoted market prices. Amortization and accretion of discounts and premiums are recorded as interest income within other income (expense), net. Realized gains and losses are included in other income (expense), net. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company assesses its available-for-sale debt securities under the available-for-sale debt security impairment model in ASC 326, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Financial Instruments - Credit Losses</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, as of each reporting date in order to determine if a portion of any decline in fair value below carrying value recognized on its available-for-sale debt securities is the result of a credit loss. The Company records credit losses in the consolidated statements of operations and comprehensive loss as a component of other income (expense), net, which is limited to the difference between the fair value and the amortized cost of the security. To date, the Company has not recorded any credit losses on its available-for-sale debt securities.</span></div><span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CashAndCashEquivalentsPolicyTextBlock', window );">Cash and Cash Equivalents</a></td>
<td class="text"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Cash and Cash Equivalents</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company considers all highly-liquid investments with an original maturity, or a remaining maturity at the time of purchase, of three months or less to be cash equivalents. The Company invests excess cash primarily in money market funds, commercial paper and government agency securities, which are highly liquid and have strong credit ratings. The Company determined that these investments are subject to minimal credit and market risks. Cash and cash equivalents are stated at cost, which approximates market value.</span></div><span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock', window );">Recently Issued Accounting Pronouncements</a></td>
<td class="text"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Recently Issued Accounting Pronouncements</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">From time to time, new accounting pronouncements are issued by the FASB or other standard setting bodies that the Company adopts as of the specified effective date. Unless otherwise discussed below, the Company does not believe that the adoption of recently issued standards have or may have a material impact on the Company's condensed consolidated financial statements or disclosures.</span></div><span></span>
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<td class="text">Net loss per shareBasic net loss per share of common stock is calculated by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period, without further consideration for potentially dilutive securities. Diluted net loss per share is computed by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock and potentially dilutive securities outstanding for the period determined using the treasury stock method.For purposes of the diluted net loss per share calculation, stock options, unvested RSUs and warrants to purchase common stock are considered to be potentially dilutive securities, but are excluded from the calculation of diluted net loss per share because their effect would be anti-dilutive and therefore, basic and diluted net loss per share were the same for all periods presented.<span></span>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Disclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=126999549&amp;loc=d3e4273-108586<br></p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Disclosure of accounting policy for credit risk.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 275<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -Subparagraph (d)<br> -URI https://asc.fasb.org/extlink&amp;oid=99393423&amp;loc=d3e5967-108592<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 825<br> -Section 50<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=126941378&amp;loc=d3e61044-112788<br></p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 235<br> -SubTopic 10<br> -Section 50<br> -Paragraph 4<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126899994&amp;loc=d3e18823-107790<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 810<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=109239629&amp;loc=d3e5614-111684<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Disclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -Subparagraph (c)<br> -URI https://asc.fasb.org/extlink&amp;oid=124432515&amp;loc=d3e3550-109257<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=124432515&amp;loc=d3e3630-109257<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Disclosure of accounting policy for fair value measurements of financial and non-financial assets, liabilities and instruments classified in shareholders' equity. Disclosures include, but are not limited to, how an entity that manages a group of financial assets and liabilities on the basis of its net exposure measures the fair value of those assets and liabilities.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Disclosure of accounting policy for investment classified as marketable security.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 320<br> -Section 50<br> -Paragraph 5<br> -URI https://asc.fasb.org/extlink&amp;oid=126980459&amp;loc=d3e62652-112803<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Disclosure of accounting policy pertaining to new accounting pronouncements that may impact the entity's financial reporting. Includes, but is not limited to, quantification of the expected or actual impact.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Description of accounting policies and methodologies used to estimate the entity's liability for off-balance sheet credit exposures and related charges for those credit exposures.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 310<br> -SubTopic 10<br> -Section 50<br> -Paragraph 9<br> -URI https://asc.fasb.org/extlink&amp;oid=123577603&amp;loc=d3e5144-111524<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 326<br> -SubTopic 20<br> -Section 50<br> -Paragraph 21<br> -URI https://asc.fasb.org/extlink&amp;oid=124255953&amp;loc=SL82919272-210447<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_OffBalanceSheetCreditExposurePolicyPolicyTextBlock</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Disclosure of accounting policy for segment reporting.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 29<br> -Subparagraph (e)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8864-108599<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 29<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8864-108599<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 41<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e9038-108599<br><br>Reference 4: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 29<br> -Subparagraph (c)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8864-108599<br><br>Reference 5: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 29<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8864-108599<br><br>Reference 6: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 29<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8864-108599<br><br>Reference 7: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 29<br> -Subparagraph (d)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8864-108599<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 275<br> -SubTopic 10<br> -Section 50<br> -Paragraph 12<br> -URI https://asc.fasb.org/extlink&amp;oid=99393423&amp;loc=d3e6191-108592<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 275<br> -SubTopic 10<br> -Section 50<br> -Paragraph 11<br> -URI https://asc.fasb.org/extlink&amp;oid=99393423&amp;loc=d3e6161-108592<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 275<br> -SubTopic 10<br> -Section 50<br> -Paragraph 9<br> -URI https://asc.fasb.org/extlink&amp;oid=99393423&amp;loc=d3e6143-108592<br><br>Reference 4: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 275<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=99393423&amp;loc=d3e5967-108592<br><br>Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 275<br> -SubTopic 10<br> -Section 50<br> -Paragraph 4<br> -URI https://asc.fasb.org/extlink&amp;oid=99393423&amp;loc=d3e6061-108592<br><br>Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 275<br> -SubTopic 10<br> -Section 50<br> -Paragraph 8<br> -URI https://asc.fasb.org/extlink&amp;oid=99393423&amp;loc=d3e6132-108592<br><br>Reference 7: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 275<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -Subparagraph (c)<br> -URI https://asc.fasb.org/extlink&amp;oid=99393423&amp;loc=d3e5967-108592<br></p></div>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031642054624">
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<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Collaboration agreements (Tables)<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
</tr>
<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_CollaborationAgreementsAbstract', window );"><strong>Collaboration agreements</strong></a></td>
<td class="text">&#160;<span></span>
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<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock', window );">Schedule of Changes in the Balance of Our Contract Assets and Liabilities and Recognized Revenue</a></td>
<td class="text">The following table presents changes in the balances of the Company's contract liabilities related to the GSK Agreement during the nine months ended September&#160;30, 2022:<div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"><tr><td style="width:1.0%"/><td style="width:45.127%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.744%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>Beginning<br/>of Period</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Additions</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Deductions</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>End of Period</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Nine months ended September 30, 2022</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Contract liabilities:</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Deferred revenue</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">100,000&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">655&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">99,345&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During the three and nine months ended September&#160;30, 2022, the Company recognized the following revenues related to the GSK Agreement as a result of changes in the contract liability balances in the respective periods:</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:63.803%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:16.047%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:16.049%"/><td style="width:0.1%"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three Months Ended<br/>September 30,</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended<br/>September 30,</span></td><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Revenue recognized in the period from:</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Amounts included in the contract liability at the beginning of the period</span></td><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Performance obligations satisfied in previous periods</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr></table></div>The following table presents changes in the balances of the Company's contract liabilities related to the Janssen Agreement during the nine months ended September&#160;30, 2022:<div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"><tr><td style="width:1.0%"/><td style="width:45.127%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.744%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>Beginning<br/>of Period</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Additions</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Deductions</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>End of Period</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Nine months ended September 30, 2022</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Contract liabilities:</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Deferred revenue</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">40,000&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">10,916&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">29,084&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During the three and nine months ended September&#160;30, 2022, the Company recognized the following revenues related to the Janssen Agreement as a result of changes in the contract liability balances in the respective periods:</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:63.803%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:16.047%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:16.049%"/><td style="width:0.1%"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three Months Ended<br/>September 30,</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended<br/>September 30,</span></td><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Revenue recognized in the period from:</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Amounts included in the contract liability at the beginning of the period</span></td><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">4,908&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Performance obligations satisfied in previous periods</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr></table></div>The following table presents changes in the balances of the Company's contract liabilities related to the Merck KGaA Agreement and Merck KGaA Supply Agreement during the nine months ended September&#160;30, 2022 and 2021:<div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"><tr><td style="width:1.0%"/><td style="width:45.127%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.744%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>Beginning<br/>of Period</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Additions</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Deductions</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>End of Period</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Nine months ended September 30, 2022</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Contract liabilities:</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Deferred revenue</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3,944&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">32&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3,912&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"><tr><td style="width:1.0%"/><td style="width:45.127%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.744%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>Beginning<br/>of Period</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Additions</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Deductions</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Balance at<br/>End of Period</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Nine months ended September 30, 2021</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Contract liabilities:</span></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Deferred revenue</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3,987&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">32&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3,955&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During the three and nine months ended September&#160;30, 2022 and 2021, the Company recognized the following revenues related to the Merck KGaA Agreement and Merck KGaA Supply Agreement as a result of changes in the contract liability balances in the respective periods:</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:45.214%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.720%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.720%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.720%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.723%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three Months Ended<br/>September 30,</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended<br/>September 30,</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%">Revenue recognized in the period from:</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Amounts included in the contract liability at the beginning of the period</span></td><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">11&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">11&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">32&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">32&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Performance obligations satisfied in previous periods</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 50<br> -Paragraph 10<br> -URI https://asc.fasb.org/extlink&amp;oid=126920106&amp;loc=SL49130551-203045<br></p></div>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031642055856">
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<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Fair value measurements (Tables)<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
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<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FairValueDisclosuresAbstract', window );"><strong>Fair Value Disclosures [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock', window );">Fair Value, Assets Measured on Recurring Basis</a></td>
<td class="text"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table presents information about the Company's assets measured at fair value on a recurring basis and indicates the level within fair value hierarchy of the valuation techniques utilized to determine such value. The Company had no marketable securities as of December&#160;31, 2021.</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:98.076%"><tr><td style="width:1.0%"/><td style="width:46.612%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.971%"/><td style="width:0.1%"/><td colspan="3" style="display:none"/><td style="width:1.0%"/><td style="width:11.971%"/><td style="width:0.1%"/><td colspan="3" style="display:none"/><td style="width:1.0%"/><td style="width:11.971%"/><td style="width:0.1%"/><td colspan="3" style="display:none"/><td style="width:1.0%"/><td style="width:11.975%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="12" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30, 2022</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Total</span></td><td colspan="3" style="display:none"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Quoted&#160;Prices<br/>in&#160;Active<br/>Markets<br/>(Level&#160;1)</span></td><td colspan="3" style="display:none"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Significant<br/>Other<br/>Observable<br/>Inputs<br/>(Level&#160;2)</span></td><td colspan="3" style="display:none"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Significant<br/>Unobservable<br/>Inputs<br/>(Level&#160;3)</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Cash equivalents</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Money market funds</span></td><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">29,509&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">29,509&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Marketable securities</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">U.S. treasury securities</span></td><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">101,118&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">101,118&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">U.S. government agency securities</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">4,926&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">4,926&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><span></span>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 820<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=126976982&amp;loc=d3e19207-110258<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 820<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126976982&amp;loc=d3e19207-110258<br></p></div>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031726753712">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Cash, cash equivalents, and short-term marketable securities (Tables)<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
</tr>
<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract', window );"><strong>Investments, Debt and Equity Securities [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock', window );">Schedule of Restricted Cash</a></td>
<td class="text"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table summarizes the Company's cash, cash equivalents, and restricted cash as of September&#160;30, 2022 and 2021.</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"><tr><td style="width:1.0%"/><td style="width:45.127%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.744%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended<br/>September 30, 2022</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended<br/>September 30, 2021</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Beginning<br/>of period</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">End<br/>of period</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Beginning<br/>of period</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">End<br/>of period</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Cash and cash equivalents</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">177,947&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">184,082&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">255,094&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">191,707&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Restricted cash included in other assets, noncurrent</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">478&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">478&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">321&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">478&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total cash, cash equivalents and restricted cash per statement of cash flows</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">178,425&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">184,560&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">255,415&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">192,185&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><span></span>
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<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock', window );">Debt Securities, Available-for-Sale</a></td>
<td class="text"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table summarizes the Company's marketable securities held at September&#160;30, 2022. </span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company had no marketable securities as of</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> December&#160;31, 2021.</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"><tr><td style="width:1.0%"/><td style="width:45.127%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.741%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.602%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.744%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="21" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30, 2022</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Amortized<br/>Cost</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Gross<br/>Unrealized<br/>Gains</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Gross<br/>Unrealized<br/>Losses</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Fair<br/>Value</span></td></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Marketable securities</span></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">U.S. treasury securities</span></td><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">101,342&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">4&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(228)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">101,118&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">U.S. government agency securities</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">4,933&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(7)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">4,926&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" 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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 320<br> -URI https://asc.fasb.org/topic&amp;trid=2196928<br></p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Tabular disclosure of cash and cash equivalents restricted as to withdrawal or usage.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-03(1)(a))<br> -URI https://asc.fasb.org/extlink&amp;oid=126897435&amp;loc=d3e534808-122878<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 50<br> -Paragraph 8<br> -URI https://asc.fasb.org/extlink&amp;oid=126999549&amp;loc=SL98516268-108586<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.7-03(a)(2))<br> -URI https://asc.fasb.org/extlink&amp;oid=126734703&amp;loc=d3e572229-122910<br></p></div>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031642109600">
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<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Accrued expenses (Tables)<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
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<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AccruedLiabilitiesCurrentAbstract', window );"><strong>Accrued Liabilities, Current [Abstract]</strong></a></td>
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<td class="text"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Accrued expenses consisted of the following as of September&#160;30, 2022 and December&#160;31, 2021:</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:70.214%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.842%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.843%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30,<br/>2022</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">December 31,<br/>2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accrued manufacturing expenses</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">13,230&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">8,476&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accrued clinical expenses</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">10,972&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">7,879&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accrued research and non-clinical expenses</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">5,811&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3,848&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accrued payroll and related expenses</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">9,083&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">7,319&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accrued professional fees</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">1,822&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">909&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accrued other</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">286&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">285&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">41,204&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">28,716&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><span></span>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Tabular disclosure of the (a) carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business (accounts payable); (b) other payables; and (c) accrued liabilities. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). An alternative caption includes accrued expenses.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<td><strong> Name:</strong></td>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031642727456">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Debt (Tables)<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
</tr>
<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtDisclosureAbstract', window );"><strong>Debt Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ScheduleOfDebtTableTextBlock', window );">Schedule of Debt</a></td>
<td class="text"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following is a summary of obligations under the term loan as of September&#160;30, 2022:</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:84.957%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.843%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30,<br/>2022</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total debt</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">25,000&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Less: Current portion of long-term debt</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Total debt, net of current portion</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">25,000&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Debt financing costs, net of accretion</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(345)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Accretion related to final payment</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">198&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Long-term debt, net</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">24,853&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><span></span>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
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<TYPE>XML
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<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031645967440">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Stockholders' equity (Tables)<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
</tr>
<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockholdersEquityNoteAbstract', window );"><strong>Stockholders' Equity Note [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ScheduleOfStockByClassTextBlock', window );">Schedule for Number of Common Stock Reserved for Exercise of Outstanding Stock Options and Warrants</a></td>
<td class="text"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of September&#160;30, 2022 and December&#160;31, 2021, there were 12,418,052 and 9,199,512, respectively, shares of common stock reserved for the exercise of outstanding stock options, restricted stock units ("RSUs") and warrants.</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:70.214%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.842%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.843%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">September 30,<br/>2022</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">December 31,<br/>2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Stock options</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">10,524,780&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">8,342,429&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Restricted stock units</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">1,870,682&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">817,609&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Warrants</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">22,590&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">39,474&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">12,418,052&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">9,199,512&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><span></span>
</td>
</tr>
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<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ScheduleOfStockByClassTextBlock">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding.</p></div>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031640620656">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Stock-based compensation (Tables)<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
</tr>
<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract', window );"><strong>Share-Based Payment Arrangement [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock', window );">Schedule of Stock Option Activity Under Plan</a></td>
<td class="text"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">A summary of stock option activity is as follows:</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:70.214%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.842%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.843%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Number<br/>of&#160;Shares</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Weighted-<br/>Average<br/>Exercise&#160;Price</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Outstanding at January&#160;1, 2022</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">8,342,429&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">11.25&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Granted</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2,765,034&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">5.41&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Exercised</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(54,299)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3.81&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Cancelled</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(528,384)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">13.33&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Outstanding at September&#160;30,&#160;2022</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">10,524,780&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">9.65&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Vested and expected to vest at September 30, 2022</span></td><td colspan="2" style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">10,524,780&#160;</span></td><td style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">9.65&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Exercisable at September&#160;30,&#160;2022</span></td><td colspan="2" style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:3pt double #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">5,339,351&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:3pt double #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">8.96&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table><span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock', window );">Schedule of Restricted Stock Activity</a></td>
<td class="text"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">A summary of the RSU activity is as follows:</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:84.957%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.843%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Number of Shares</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Unvested at January&#160;1, 2022</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">817,609&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Granted</span></td><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">1,379,849&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Vested</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(190,841)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Forfeited</span></td><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">(135,935)</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Unvested at September&#160;30,&#160;2022</span></td><td colspan="2" style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">1,870,682&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table><span></span>
</td>
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<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock', window );">Schedule of Stock-Based Compensation Expense by Award Type</a></td>
<td class="text"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table presents stock-based compensation expense by award type included within the Company&#8217;s condensed consolidated statements of operations and comprehensive loss:</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:45.694%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.720%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.441%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.720%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.441%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.720%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.441%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.723%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three Months Ended September 30,</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended September 30,</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Stock options</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3,901&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3,986&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">11,952&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">10,617&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Restricted stock units</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">1,365&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">881&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">3,832&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2,636&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Employee stock purchase plan</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">109&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">61&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">424&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">296&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Stock-based compensation expense included in total operating expenses</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">5,375&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">4,928&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">16,208&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">13,549&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table><span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock', window );">Schedule of Stock-Based Compensation Expense as Reflected in the Company's Condensed Consolidated Statements of Operations and Comprehensive Loss</a></td>
<td class="text"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table presents stock-based compensation expense as reflected in the Company&#8217;s condensed consolidated statements of operations and comprehensive loss:</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:45.534%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.720%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.720%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.441%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.720%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.441%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.723%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three Months Ended September 30,</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended September 30,</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(in thousands)</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Research and development</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2,890&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2,607&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">8,569&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">7,410&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">General and administrative</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2,485&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2,321&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">7,639&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">6,139&#160;</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Stock-based compensation expense included in total operating expenses</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">5,375&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">4,928&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">16,208&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">13,549&#160;</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table><span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock', window );">Schedule of Weighted Average Assumptions for Estimating Fair Value of Option Awards</a></td>
<td class="text"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The fair value of each option award is estimated on the date of grant using the Black-Scholes option pricing model with the following weighted average assumptions:</span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:47.457%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.560%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.560%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.441%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.560%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.441%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:10.280%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three Months Ended<br/>September 30,</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended September 30,</span></td></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2022</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Risk-free interest rate</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2.9&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">1.0&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">2.0&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">0.8&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Expected dividend yield</span></td><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">&#8212;&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Expected term (years)</span></td><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">6.11</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">6.11</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">5.99</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">6.05</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Expected stock price volatility</span></td><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">94&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">82&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">88&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">83&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">%</span></td></tr></table><span></span>
</td>
</tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (h)(1)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.</p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.</p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (d)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (e)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(1)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.</p></div>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031642028960">
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<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Net loss per share (Tables)<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
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<td class="text">&#160;<span></span>
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<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock', window );">Schedule of Outstanding Potentially Dilutive Securities</a></td>
<td class="text"><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table sets forth the outstanding potentially dilutive securities that have been excluded from the calculation of diluted net loss per share because to include them would be anti-dilutive (in common stock equivalent shares):</span></div><div style="margin-bottom:12pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"/><td style="width:49.220%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:23.419%"/><td style="width:0.1%"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td style="width:0.1%"/><td style="width:0.441%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:23.420%"/><td style="width:0.1%"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three and Nine Months Ended<br/>September 30, 2022</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Three and Nine Months Ended<br/>September 30, 2021</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Stock options</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">10,524,780&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">8,215,549&#160;</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Unvested restricted stock units</span></td><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">1,870,682&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">800,466&#160;</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">Warrants</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">22,590&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">39,474&#160;</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%">12,418,052&#160;</span></td><td style="border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span 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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -Subparagraph (c)<br> -URI https://asc.fasb.org/extlink&amp;oid=124432515&amp;loc=d3e3550-109257<br></p></div>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031637155424">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Nature of business and basis of presentation (Details) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="6">3 Months Ended</th>
<th class="th" colspan="2">9 Months Ended</th>
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<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Jun. 30, 2022</div></th>
<th class="th"><div>Mar. 31, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
<th class="th"><div>Jun. 30, 2021</div></th>
<th class="th"><div>Mar. 31, 2021</div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="num">$ (59,811)<span></span>
</td>
<td class="num">$ (52,219)<span></span>
</td>
<td class="num">$ (47,258)<span></span>
</td>
<td class="num">$ (45,471)<span></span>
</td>
<td class="num">$ (40,913)<span></span>
</td>
<td class="num">$ (34,693)<span></span>
</td>
<td class="num">$ (159,288)<span></span>
</td>
<td class="num">$ (121,077)<span></span>
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<td class="text">&#160;<span></span>
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<td class="num">$ (609,767)<span></span>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="num">$ (609,767)<span></span>
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<td class="text">&#160;<span></span>
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<td class="num">$ (450,479)<span></span>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.</p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The cumulative amount of the reporting entity's undistributed earnings or deficit.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(30)(a)(3))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 2: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 852<br> -SubTopic 10<br> -Section 55<br> -Paragraph 10<br> -URI https://asc.fasb.org/extlink&amp;oid=84165509&amp;loc=d3e56426-112766<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.7-03(a)(23)(a)(4))<br> -URI https://asc.fasb.org/extlink&amp;oid=126734703&amp;loc=d3e572229-122910<br><br>Reference 4: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 40<br> -Section 65<br> -Paragraph 2<br> -Subparagraph (h)(2)<br> -URI https://asc.fasb.org/extlink&amp;oid=124501264&amp;loc=SL117420844-207641<br><br>Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.3-04)<br> -URI https://asc.fasb.org/extlink&amp;oid=120397183&amp;loc=d3e187085-122770<br><br>Reference 6: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 40<br> -Section 65<br> -Paragraph 2<br> -Subparagraph (g)(2)(i)<br> -URI https://asc.fasb.org/extlink&amp;oid=124501264&amp;loc=SL117420844-207641<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031635299472">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Summary of significant accounting policies - Narrative (Details)<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
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<div>Sep. 30, 2022 </div>
<div>segment</div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 18<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8672-108599<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031640284160">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Collaboration agreements - GlaxoSmithKline (Details) - USD ($)<br></strong></div></th>
<th class="th" colspan="2">3 Months Ended</th>
<th class="th" colspan="2">9 Months Ended</th>
<th class="th" colspan="1"></th>
</tr>
<tr>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
<th class="th"><div>Aug. 31, 2022</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems', window );"><strong>Collaboration agreements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax', window );">Collaboration revenue</a></td>
<td class="nump">$ 5,573,000<span></span>
</td>
<td class="nump">$ 11,000<span></span>
</td>
<td class="nump">$ 11,893,000<span></span>
</td>
<td class="nump">$ 32,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mrsn_GSKAgreementMember', window );">GSK Agreement</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems', window );"><strong>Collaboration agreements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerLiability', window );">Deferred revenue</a></td>
<td class="nump">99,300,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">99,300,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 100,000,000<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_CollaborationArrangementPotentialOptionExerciseReceivable', window );">Collaboration arrangement, potential option exercise receivable</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">90,000,000<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax', window );">Collaboration revenue</a></td>
<td class="nump">700,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerAssetNet', window );">Contract assets</a></td>
<td class="nump">$ 0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mrsn_GSKAgreementMember', window );">GSK Agreement | Development, Regulatory &amp; Commercial</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems', window );"><strong>Collaboration agreements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_CollaborationArrangementsMaximumAggregateMilestones', window );">Collaboration arrangements, maximum aggregate milestones</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">1,300,000,000<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mrsn_GSKAgreementMember', window );">GSK Agreement | Early Clinical Development</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems', window );"><strong>Collaboration agreements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_CollaborationArrangementsMaximumAggregateMilestones', window );">Collaboration arrangements, maximum aggregate milestones</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 30,000,000<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_CollaborationArrangementPotentialOptionExerciseReceivable">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The amount the company is eligible to receive upon an option exercise as part of a collaboration arrangement.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_CollaborationArrangementPotentialOptionExerciseReceivable</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_CollaborationArrangementsMaximumAggregateMilestones">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Maximum aggregate milestone the Company is entitled to receive under terms of the agreement.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_CollaborationArrangementsMaximumAggregateMilestones</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ContractWithCustomerAssetNet">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 50<br> -Paragraph 8<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126920106&amp;loc=SL49130549-203045<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=126919976&amp;loc=SL49130531-203044<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 45<br> -Paragraph 3<br> -URI https://asc.fasb.org/extlink&amp;oid=126919976&amp;loc=SL49130533-203044<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ContractWithCustomerAssetNet</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ContractWithCustomerLiability">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=126919976&amp;loc=SL49130531-203044<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 50<br> -Paragraph 8<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126920106&amp;loc=SL49130549-203045<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 45<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=126919976&amp;loc=SL49130532-203044<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ContractWithCustomerLiability</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 30<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8906-108599<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 40<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e9031-108599<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 41<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e9038-108599<br><br>Reference 4: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 32<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8933-108599<br><br>Reference 5: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 32<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8933-108599<br><br>Reference 6: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 50<br> -Paragraph 4<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126920106&amp;loc=SL49130543-203045<br><br>Reference 7: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 22<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8736-108599<br><br>Reference 8: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 22<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8736-108599<br><br>Reference 9: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 42<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e9054-108599<br><br>Reference 10: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 50<br> -Paragraph 5<br> -URI https://asc.fasb.org/extlink&amp;oid=126920106&amp;loc=SL49130545-203045<br><br>Reference 11: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 924<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SAB Topic 11.L)<br> -URI https://asc.fasb.org/extlink&amp;oid=6472922&amp;loc=d3e499488-122856<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mrsn_GSKAgreementMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mrsn_GSKAgreementMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
</table>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_TypeOfArrangementAxis=mrsn_DevelopmentalCommercialAndRegulatoryMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
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<tr>
<td><strong> Period Type:</strong></td>
<td></td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_TypeOfArrangementAxis=mrsn_EarlyClinicalDevelopmentMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_TypeOfArrangementAxis=mrsn_EarlyClinicalDevelopmentMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
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<tr>
<td><strong> Period Type:</strong></td>
<td></td>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031640267296">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Collaboration agreements - Contract Assets and Liabilities (Details) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="2">3 Months Ended</th>
<th class="th" colspan="2">9 Months Ended</th>
</tr>
<tr>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_TypeOfArrangementAxis=mrsn_GSKAgreementMember', window );">GSK Agreement</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_ChangeInContractAssetsAndLiabilitiesRollForward', window );"><strong>Contract liabilities</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerLiability', window );">Balance at Beginning of Period</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_ContractWithCustomerLiabilityIncrease', window );">Additions</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">100,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_ContractWithCustomerLiabilityDecrease', window );">Deductions</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">655<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerLiability', window );">Balance at End of Period</a></td>
<td class="nump">$ 99,345<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">99,345<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerLiabilityRevenueRecognized', window );">Amounts included in the contract liability at the beginning of the period</a></td>
<td class="nump">0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod', window );">Performance obligations satisfied in previous periods</a></td>
<td class="nump">0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_TypeOfArrangementAxis=mrsn_JanssenAgreementMember', window );">Janssen Agreement</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_ChangeInContractAssetsAndLiabilitiesRollForward', window );"><strong>Contract liabilities</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerLiability', window );">Balance at Beginning of Period</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_ContractWithCustomerLiabilityIncrease', window );">Additions</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">40,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_ContractWithCustomerLiabilityDecrease', window );">Deductions</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">10,916<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerLiability', window );">Balance at End of Period</a></td>
<td class="nump">29,084<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">29,084<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerLiabilityRevenueRecognized', window );">Amounts included in the contract liability at the beginning of the period</a></td>
<td class="nump">4,908<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod', window );">Performance obligations satisfied in previous periods</a></td>
<td class="nump">0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_TypeOfArrangementAxis=mrsn_CollaborationAndCommercialLicenseAgreementAndSupplyAgreementMerckKgaaMember', window );">License and supply agreement Merck KGaA</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_ChangeInContractAssetsAndLiabilitiesRollForward', window );"><strong>Contract liabilities</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerLiability', window );">Balance at Beginning of Period</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">3,944<span></span>
</td>
<td class="nump">$ 3,987<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_ContractWithCustomerLiabilityIncrease', window );">Additions</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">0<span></span>
</td>
<td class="nump">0<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_ContractWithCustomerLiabilityDecrease', window );">Deductions</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">32<span></span>
</td>
<td class="nump">32<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerLiability', window );">Balance at End of Period</a></td>
<td class="nump">3,912<span></span>
</td>
<td class="nump">$ 3,955<span></span>
</td>
<td class="nump">3,912<span></span>
</td>
<td class="nump">3,955<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerLiabilityRevenueRecognized', window );">Amounts included in the contract liability at the beginning of the period</a></td>
<td class="nump">11<span></span>
</td>
<td class="nump">11<span></span>
</td>
<td class="nump">32<span></span>
</td>
<td class="nump">32<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod', window );">Performance obligations satisfied in previous periods</a></td>
<td class="nump">$ 0<span></span>
</td>
<td class="nump">$ 0<span></span>
</td>
<td class="nump">$ 0<span></span>
</td>
<td class="nump">$ 0<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_ChangeInContractAssetsAndLiabilitiesRollForward">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Change In Contract Assets And Liabilities</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_ChangeInContractAssetsAndLiabilitiesRollForward</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_ContractWithCustomerLiabilityDecrease">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of decrease in obligation to transfer good or service to customer for which consideration has been received or is receivable.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_ContractWithCustomerLiabilityDecrease</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_ContractWithCustomerLiabilityIncrease">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of increase in obligation to transfer good or service to customer for which consideration has been received or is receivable.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_ContractWithCustomerLiabilityIncrease</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ContractWithCustomerLiability">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=126919976&amp;loc=SL49130531-203044<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 50<br> -Paragraph 8<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126920106&amp;loc=SL49130549-203045<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 45<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=126919976&amp;loc=SL49130532-203044<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ContractWithCustomerLiability</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ContractWithCustomerLiabilityRevenueRecognized">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 50<br> -Paragraph 8<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=126920106&amp;loc=SL49130549-203045<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ContractWithCustomerLiabilityRevenueRecognized</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of revenue recognized from performance obligation satisfied or partially satisfied in previous reporting periods. Includes, but is not limited to, change in transaction price.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 50<br> -Paragraph 12A<br> -URI https://asc.fasb.org/extlink&amp;oid=126920106&amp;loc=SL108322424-203045<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_TypeOfArrangementAxis=mrsn_GSKAgreementMember</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_TypeOfArrangementAxis=mrsn_JanssenAgreementMember</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td><strong> Data Type:</strong></td>
<td>na</td>
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<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_TypeOfArrangementAxis=mrsn_CollaborationAndCommercialLicenseAgreementAndSupplyAgreementMerckKgaaMember</td>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031640222800">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Collaboration agreements - Janssen Biotech (Details)<br></strong></div></th>
<th class="th" colspan="1">1 Months Ended</th>
<th class="th" colspan="2">3 Months Ended</th>
<th class="th" colspan="2">9 Months Ended</th>
</tr>
<tr>
<th class="th">
<div>Feb. 28, 2022 </div>
<div>USD ($) </div>
<div>target</div>
</th>
<th class="th">
<div>Sep. 30, 2022 </div>
<div>USD ($)</div>
</th>
<th class="th">
<div>Sep. 30, 2021 </div>
<div>USD ($)</div>
</th>
<th class="th">
<div>Sep. 30, 2022 </div>
<div>USD ($)</div>
</th>
<th class="th">
<div>Sep. 30, 2021 </div>
<div>USD ($)</div>
</th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems', window );"><strong>Collaboration agreements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax', window );">Collaboration revenue</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 5,573,000<span></span>
</td>
<td class="nump">$ 11,000<span></span>
</td>
<td class="nump">$ 11,893,000<span></span>
</td>
<td class="nump">$ 32,000<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mrsn_JanssenAgreementMember', window );">Janssen Agreement</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems', window );"><strong>Collaboration agreements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_CollaborationArrangementsTargetsDesignatedNumber', window );">Number of targets designated | target</a></td>
<td class="nump">3<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ProceedsFromCollaborators', window );">Proceeds from collaborators</a></td>
<td class="nump">$ 40,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax', window );">Collaboration revenue</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">4,900,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">10,900,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerLiability', window );">Deferred revenue</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">29,100,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">29,100,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_RevenueRemainingPerformanceObligation', window );">Remaining performance obligation</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">29,100,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">29,100,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerAssetNet', window );">Contract assets</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_TypeOfArrangementAxis=mrsn_DevelopmentalCommercialAndRegulatoryMember', window );">Development, Regulatory &amp; Commercial | Janssen Agreement</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems', window );"><strong>Collaboration agreements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_CollaborationArrangementsMaximumAggregateMilestones', window );">Collaboration arrangements, maximum aggregate milestones</a></td>
<td class="nump">505,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_TypeOfArrangementAxis=mrsn_CommercialMember', window );">Commercial | Janssen Agreement</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems', window );"><strong>Collaboration agreements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_CollaborationArrangementsMaximumAggregateMilestones', window );">Collaboration arrangements, maximum aggregate milestones</a></td>
<td class="nump">$ 530,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
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<div style="display: none;">
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Maximum aggregate milestone the Company is entitled to receive under terms of the agreement.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_CollaborationArrangementsMaximumAggregateMilestones</td>
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<td>xbrli:monetaryItemType</td>
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<td><strong> Balance Type:</strong></td>
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<td>instant</td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of targets designated as of balance sheet date.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_CollaborationArrangementsTargetsDesignatedNumber</td>
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<td>instant</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems</td>
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<td><strong> Data Type:</strong></td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ContractWithCustomerAssetNet">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 50<br> -Paragraph 8<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126920106&amp;loc=SL49130549-203045<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=126919976&amp;loc=SL49130531-203044<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 45<br> -Paragraph 3<br> -URI https://asc.fasb.org/extlink&amp;oid=126919976&amp;loc=SL49130533-203044<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ContractWithCustomerAssetNet</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
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</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ContractWithCustomerLiability">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=126919976&amp;loc=SL49130531-203044<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 50<br> -Paragraph 8<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126920106&amp;loc=SL49130549-203045<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 45<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=126919976&amp;loc=SL49130532-203044<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ContractWithCustomerLiability</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProceedsFromCollaborators">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Cash received from collaborators during the current period.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 25<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3536-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ProceedsFromCollaborators</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 30<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8906-108599<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 40<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e9031-108599<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 41<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e9038-108599<br><br>Reference 4: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 32<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8933-108599<br><br>Reference 5: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 32<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8933-108599<br><br>Reference 6: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 50<br> -Paragraph 4<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126920106&amp;loc=SL49130543-203045<br><br>Reference 7: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 22<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8736-108599<br><br>Reference 8: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 22<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e8736-108599<br><br>Reference 9: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 280<br> -SubTopic 10<br> -Section 50<br> -Paragraph 42<br> -URI https://asc.fasb.org/extlink&amp;oid=126901519&amp;loc=d3e9054-108599<br><br>Reference 10: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 50<br> -Paragraph 5<br> -URI https://asc.fasb.org/extlink&amp;oid=126920106&amp;loc=SL49130545-203045<br><br>Reference 11: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 924<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SAB Topic 11.L)<br> -URI https://asc.fasb.org/extlink&amp;oid=6472922&amp;loc=d3e499488-122856<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_RevenueRemainingPerformanceObligation">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of transaction price allocated to performance obligation that has not been recognized as revenue.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 50<br> -Paragraph 13<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126920106&amp;loc=SL49130556-203045<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_RevenueRemainingPerformanceObligation</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mrsn_JanssenAgreementMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mrsn_JanssenAgreementMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_TypeOfArrangementAxis=mrsn_DevelopmentalCommercialAndRegulatoryMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_TypeOfArrangementAxis=mrsn_DevelopmentalCommercialAndRegulatoryMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_TypeOfArrangementAxis=mrsn_CommercialMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_TypeOfArrangementAxis=mrsn_CommercialMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
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<tr>
<td><strong> Period Type:</strong></td>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031639175296">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Collaboration agreements - Merck KGaA (Details)<br></strong></div></th>
<th class="th" colspan="1">1 Months Ended</th>
<th class="th" colspan="2">3 Months Ended</th>
<th class="th" colspan="2">9 Months Ended</th>
<th class="th" colspan="1"></th>
<th class="th" colspan="1"></th>
<th class="th" colspan="1"></th>
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<tr>
<th class="th">
<div>Jun. 30, 2014 </div>
<div>USD ($) </div>
<div>target</div>
</th>
<th class="th">
<div>Sep. 30, 2022 </div>
<div>USD ($) </div>
<div>target</div>
</th>
<th class="th">
<div>Sep. 30, 2021 </div>
<div>USD ($)</div>
</th>
<th class="th">
<div>Sep. 30, 2022 </div>
<div>USD ($) </div>
<div>target</div>
</th>
<th class="th">
<div>Sep. 30, 2021 </div>
<div>USD ($)</div>
</th>
<th class="th">
<div>Dec. 31, 2021 </div>
<div>USD ($)</div>
</th>
<th class="th">
<div>Dec. 31, 2020 </div>
<div>USD ($)</div>
</th>
<th class="th">
<div>Dec. 31, 2017 </div>
<div>target</div>
</th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems', window );"><strong>Collaboration agreements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ResearchAndDevelopmentExpense', window );">Research and development</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 50,639,000<span></span>
</td>
<td class="nump">$ 35,275,000<span></span>
</td>
<td class="nump">$ 127,676,000<span></span>
</td>
<td class="nump">$ 94,645,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_TypeOfArrangementAxis=mrsn_CollaborationAndCommercialLicenseAgreementMerckKgaaMember', window );">Merck KGaA</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems', window );"><strong>Collaboration agreements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ProceedsFromCollaborators', window );">Proceeds from collaborators</a></td>
<td class="nump">$ 12,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_CollaborationArrangementsTargetsDesignatedNumber', window );">Number of targets designated | target</a></td>
<td class="nump">6<span></span>
</td>
<td class="nump">6<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">6<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">6<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_CollaborationArrangementsAdditionalPaymentToObtainDevelopmentAndCommercialLicense', window );">Amount of additional fees receivable when target is designated and commercial license to target is granted</a></td>
<td class="nump">$ 0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_CollaborationArrangementsDevelopmentMilestonesPaymentReceivableNextMilestone', window );">Next potential development milestone payment eligible to receive</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 500,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 500,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_CollaborationArrangementsTargetsDesignatedPerformanceObligationsSatisfiedNumber', window );">Number of targets with satisfied performance obligations | target</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">4<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_TypeOfArrangementAxis=mrsn_CollaborationAndCommercialLicenseAgreementMerckKgaaMember', window );">Merck KGaA | Rights to Future Technological Improvements | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems', window );"><strong>Collaboration agreements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1', window );">Expected recognition period</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">10 years<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">10 years<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_TypeOfArrangementAxis=mrsn_CollaborationAndCommercialLicenseAgreementMerckKgaaMember', window );">Merck KGaA | Joint Research Committee Services | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems', window );"><strong>Collaboration agreements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1', window );">Expected recognition period</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">5 years<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">5 years<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_TypeOfArrangementAxis=mrsn_CollaborationAndCommercialLicenseAgreementAndSupplyAgreementMerckKgaaMember', window );">License and supply agreement Merck KGaA</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems', window );"><strong>Collaboration agreements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ContractWithCustomerLiability', window );">Deferred revenue</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 3,912,000<span></span>
</td>
<td class="nump">3,955,000<span></span>
</td>
<td class="nump">$ 3,912,000<span></span>
</td>
<td class="nump">3,955,000<span></span>
</td>
<td class="nump">$ 3,944,000<span></span>
</td>
<td class="nump">$ 3,987,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_TypeOfArrangementAxis=mrsn_SupplyAgreementMerckKgaaMember', window );">Merck KGaA Supply Agreement</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems', window );"><strong>Collaboration agreements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ResearchAndDevelopmentExpense', window );">Research and development</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 0<span></span>
</td>
<td class="nump">$ 0<span></span>
</td>
<td class="nump">$ 0<span></span>
</td>
<td class="nump">$ 0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_CollaborationArrangementsAdditionalPaymentToObtainDevelopmentAndCommercialLicense">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of additional fees receivable when a target is designated and the commercial license to the target is granted under terms of the agreement.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_CollaborationArrangementsAdditionalPaymentToObtainDevelopmentAndCommercialLicense</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_CollaborationArrangementsDevelopmentMilestonesPaymentReceivableNextMilestone">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of the next potential development milestone the company will be eligible to receive.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_CollaborationArrangementsDevelopmentMilestonesPaymentReceivableNextMilestone</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_CollaborationArrangementsTargetsDesignatedNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of targets designated as of balance sheet date.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_CollaborationArrangementsTargetsDesignatedNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:integerItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_CollaborationArrangementsTargetsDesignatedPerformanceObligationsSatisfiedNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of designated targets for which performance obligations have been satisfied during the period.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_CollaborationArrangementsTargetsDesignatedPerformanceObligationsSatisfiedNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:integerItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ContractWithCustomerLiability">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=126919976&amp;loc=SL49130531-203044<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 50<br> -Paragraph 8<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126920106&amp;loc=SL49130549-203045<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 45<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=126919976&amp;loc=SL49130532-203044<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ContractWithCustomerLiability</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProceedsFromCollaborators">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Cash received from collaborators during the current period.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 25<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3536-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ProceedsFromCollaborators</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ResearchAndDevelopmentExpense">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 912<br> -SubTopic 730<br> -Section 25<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=6472174&amp;loc=d3e58812-109433<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 985<br> -SubTopic 20<br> -Section 50<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=6501960&amp;loc=d3e128462-111756<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 730<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=6420194&amp;loc=d3e21568-108373<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ResearchAndDevelopmentExpense</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 606<br> -SubTopic 10<br> -Section 50<br> -Paragraph 13<br> -Subparagraph (b)(1)<br> -URI https://asc.fasb.org/extlink&amp;oid=126920106&amp;loc=SL49130556-203045<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1</td>
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<tr>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031637164848">
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<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Collaboration agreements - Other Revenue (Details) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="2">3 Months Ended</th>
<th class="th" colspan="2">9 Months Ended</th>
</tr>
<tr>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="nump">$ 5,573<span></span>
</td>
<td class="nump">$ 11<span></span>
</td>
<td class="nump">$ 11,893<span></span>
</td>
<td class="nump">$ 32<span></span>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems', window );"><strong>Collaboration agreements</strong></a></td>
<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_CollaborationArrangementsMilestonePaymentReceivableNextMilestone', window );">Next potential milestone payment eligible to receive</a></td>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems', window );"><strong>Collaboration agreements</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax', window );">Collaboration revenue</a></td>
<td class="nump">$ 0<span></span>
</td>
<td class="nump">$ 0<span></span>
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<td class="nump">$ 300<span></span>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of the next potential milestone the company will be eligible to receive.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<tr>
<td><strong> Name:</strong></td>
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<td><strong> Name:</strong></td>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031636266560">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Fair value measurements - Fair Value, Assets Measured on Recurring Basis (Details) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Dec. 31, 2021</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AssetsFairValueDisclosureAbstract', window );"><strong>Assets, Fair Value Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest', window );">Short-term marketable securities</a></td>
<td class="nump">$ 106,044<span></span>
</td>
<td class="nump">$ 0<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember', window );">U.S. treasury securities</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AssetsFairValueDisclosureAbstract', window );"><strong>Assets, Fair Value Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest', window );">Short-term marketable securities</a></td>
<td class="nump">101,118<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember', window );">U.S. government agency securities</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AssetsFairValueDisclosureAbstract', window );"><strong>Assets, Fair Value Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest', window );">Short-term marketable securities</a></td>
<td class="nump">4,926<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember', window );">Recurring basis | Money market funds</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AssetsFairValueDisclosureAbstract', window );"><strong>Assets, Fair Value Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EquitySecuritiesFvNi', window );">Cash equivalents</a></td>
<td class="nump">29,509<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember', window );">Recurring basis | U.S. treasury securities</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AssetsFairValueDisclosureAbstract', window );"><strong>Assets, Fair Value Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest', window );">Short-term marketable securities</a></td>
<td class="nump">101,118<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember', window );">Recurring basis | U.S. government agency securities</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AssetsFairValueDisclosureAbstract', window );"><strong>Assets, Fair Value Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest', window );">Short-term marketable securities</a></td>
<td class="nump">4,926<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember', window );">Recurring basis | Quoted&#160;Prices in&#160;Active Markets (Level&#160;1) | Money market funds</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AssetsFairValueDisclosureAbstract', window );"><strong>Assets, Fair Value Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EquitySecuritiesFvNi', window );">Cash equivalents</a></td>
<td class="nump">29,509<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember', window );">Recurring basis | Quoted&#160;Prices in&#160;Active Markets (Level&#160;1) | U.S. treasury securities</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AssetsFairValueDisclosureAbstract', window );"><strong>Assets, Fair Value Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest', window );">Short-term marketable securities</a></td>
<td class="nump">101,118<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember', window );">Recurring basis | Quoted&#160;Prices in&#160;Active Markets (Level&#160;1) | U.S. government agency securities</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AssetsFairValueDisclosureAbstract', window );"><strong>Assets, Fair Value Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest', window );">Short-term marketable securities</a></td>
<td class="nump">0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember', window );">Recurring basis | Significant Other Observable Inputs (Level&#160;2) | Money market funds</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AssetsFairValueDisclosureAbstract', window );"><strong>Assets, Fair Value Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EquitySecuritiesFvNi', window );">Cash equivalents</a></td>
<td class="nump">0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember', window );">Recurring basis | Significant Other Observable Inputs (Level&#160;2) | U.S. treasury securities</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AssetsFairValueDisclosureAbstract', window );"><strong>Assets, Fair Value Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest', window );">Short-term marketable securities</a></td>
<td class="nump">0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember', window );">Recurring basis | Significant Other Observable Inputs (Level&#160;2) | U.S. government agency securities</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AssetsFairValueDisclosureAbstract', window );"><strong>Assets, Fair Value Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest', window );">Short-term marketable securities</a></td>
<td class="nump">4,926<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember', window );">Recurring basis | Significant Unobservable Inputs (Level&#160;3) | Money market funds</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AssetsFairValueDisclosureAbstract', window );"><strong>Assets, Fair Value Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EquitySecuritiesFvNi', window );">Cash equivalents</a></td>
<td class="nump">0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember', window );">Recurring basis | Significant Unobservable Inputs (Level&#160;3) | U.S. treasury securities</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AssetsFairValueDisclosureAbstract', window );"><strong>Assets, Fair Value Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest', window );">Short-term marketable securities</a></td>
<td class="nump">0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember', window );">Recurring basis | Significant Unobservable Inputs (Level&#160;3) | U.S. government agency securities</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AssetsFairValueDisclosureAbstract', window );"><strong>Assets, Fair Value Disclosure [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest', window );">Short-term marketable securities</a></td>
<td class="nump">$ 0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
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<div style="display: none;">
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AssetsFairValueDisclosureAbstract</td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 326<br> -SubTopic 30<br> -Section 45<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=124258926&amp;loc=SL82898722-210454<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<td><strong> Name:</strong></td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_EquitySecuritiesFvNi">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(2))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 2: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1<br> -Subparagraph (f)<br> -URI https://asc.fasb.org/extlink&amp;oid=124098289&amp;loc=d3e6676-107765<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 825<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1A<br> -URI https://asc.fasb.org/extlink&amp;oid=123594786&amp;loc=SL75136599-209740<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_EquitySecuritiesFvNi</td>
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<tr>
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<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember</td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
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<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
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<td style="white-space:nowrap;">us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member</td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member</td>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031640735152">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Cash, cash equivalents, and short-term marketable securities - Schedule of Restricted Cash (Details) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Dec. 31, 2021</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract', window );"><strong>Investments, Debt and Equity Securities [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CashAndCashEquivalentsAtCarryingValue', window );">Cash and cash equivalents at beginning of period</a></td>
<td class="nump">$ 177,947<span></span>
</td>
<td class="nump">$ 191,707<span></span>
</td>
<td class="nump">$ 255,094<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CashAndCashEquivalentsAtCarryingValue', window );">Cash and cash equivalents at end of period</a></td>
<td class="nump">184,082<span></span>
</td>
<td class="nump">177,947<span></span>
</td>
<td class="nump">191,707<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_RestrictedCashNoncurrent', window );">Restricted cash, beginning of period</a></td>
<td class="nump">478<span></span>
</td>
<td class="nump">478<span></span>
</td>
<td class="nump">321<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_RestrictedCashNoncurrent', window );">Restricted cash, end of period</a></td>
<td class="nump">478<span></span>
</td>
<td class="nump">478<span></span>
</td>
<td class="nump">478<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents', window );">Cash, cash equivalents and restricted cash, beginning of period</a></td>
<td class="nump">178,425<span></span>
</td>
<td class="nump">192,185<span></span>
</td>
<td class="nump">255,415<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents', window );">Cash, cash equivalents and restricted cash, end of period</a></td>
<td class="nump">$ 184,560<span></span>
</td>
<td class="nump">$ 178,425<span></span>
</td>
<td class="nump">$ 192,185<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CashAndCashEquivalentsAtCarryingValue">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 4<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3044-108585<br><br>Reference 2: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section 45<br> -Paragraph 1<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=124098289&amp;loc=d3e6676-107765<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(1))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CashAndCashEquivalentsAtCarryingValue</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td><strong> Period Type:</strong></td>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 24<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3521-108585<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 4<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3044-108585<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 50<br> -Paragraph 8<br> -URI https://asc.fasb.org/extlink&amp;oid=126999549&amp;loc=SL98516268-108586<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents</td>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<td><strong> Period Type:</strong></td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of cash restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(17))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 50<br> -Paragraph 8<br> -URI https://asc.fasb.org/extlink&amp;oid=126999549&amp;loc=SL98516268-108586<br><br>Reference 3: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 954<br> -SubTopic 210<br> -Section 45<br> -Paragraph 5<br> -URI https://asc.fasb.org/extlink&amp;oid=120413173&amp;loc=SL116631458-115580<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_RestrictedCashNoncurrent</td>
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<td>xbrli:monetaryItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
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<DOCUMENT>
<TYPE>XML
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<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031640276816">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Cash, cash equivalents, and short-term marketable securities - Debt Securities, Available-for-Sale (Details) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Dec. 31, 2021</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems', window );"><strong>Debt Securities, Available-for-sale [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest', window );">Fair Value</a></td>
<td class="nump">$ 106,044<span></span>
</td>
<td class="nump">$ 0<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember', window );">U.S. treasury securities</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems', window );"><strong>Debt Securities, Available-for-sale [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss', window );">Amortized Cost</a></td>
<td class="nump">101,342<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax', window );">Gross Unrealized Gains</a></td>
<td class="nump">4<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax', window );">Gross Unrealized Losses</a></td>
<td class="num">(228)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest', window );">Fair Value</a></td>
<td class="nump">101,118<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember', window );">U.S. government agency securities</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems', window );"><strong>Debt Securities, Available-for-sale [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss', window );">Amortized Cost</a></td>
<td class="nump">4,933<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax', window );">Gross Unrealized Gains</a></td>
<td class="nump">0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax', window );">Gross Unrealized Losses</a></td>
<td class="num">(7)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest', window );">Fair Value</a></td>
<td class="nump">$ 4,926<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 320<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=126970911&amp;loc=d3e27161-111563<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 320<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)<br> -URI https://asc.fasb.org/extlink&amp;oid=126970911&amp;loc=d3e27161-111563<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>debit</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amortized cost excluding accrued interest, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 326<br> -SubTopic 30<br> -Section 45<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=124258926&amp;loc=SL82898722-210454<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>debit</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 326<br> -SubTopic 30<br> -Section 45<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=124258926&amp;loc=SL82898722-210454<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
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<td>duration</td>
</tr>
</table></div>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
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<td>na</td>
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<td><strong> Balance Type:</strong></td>
<td></td>
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<td><strong> Period Type:</strong></td>
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<SEQUENCE>48
<FILENAME>R38.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
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<body>
<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031646854992">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Cash, cash equivalents, and short-term marketable securities - Narrative (Details)<br> $ in Millions</strong></div></th>
<th class="th">
<div>Sep. 30, 2022 </div>
<div>USD ($) </div>
<div>security</div>
</th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems', window );"><strong>Debt Securities, Available-for-sale [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions', window );">Number of securities in unrealized loss position | security</a></td>
<td class="nump">23<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss', window );">Debt securities, available-for-sale, unrealized loss position, accumulated loss | $</a></td>
<td class="nump">$ 96.1<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions', window );">Securities in unrealized loss position greater than 12 months | security</a></td>
<td class="nump">0<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest', window );">Charges for credit-related impairments | $</a></td>
<td class="nump">$ 0.0<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount excluding accrued interest, of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 326<br> -SubTopic 30<br> -Section 45<br> -Paragraph 1<br> -URI https://asc.fasb.org/extlink&amp;oid=124258926&amp;loc=SL82898722-210454<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without an allowance for credit loss. Includes beneficial interest in securitized financial asset.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 326<br> -SubTopic 30<br> -Section 50<br> -Paragraph 4<br> -Subparagraph (b)(3)<br> -URI https://asc.fasb.org/extlink&amp;oid=124269663&amp;loc=SL82922888-210455<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions</td>
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<tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 320<br> -SubTopic 10<br> -Section 50<br> -Paragraph 6<br> -Subparagraph (a)(2)<br> -URI https://asc.fasb.org/extlink&amp;oid=126970911&amp;loc=d3e27290-111563<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 326<br> -SubTopic 30<br> -Section 50<br> -Paragraph 4<br> -Subparagraph (a)(2)<br> -URI https://asc.fasb.org/extlink&amp;oid=124269663&amp;loc=SL82922888-210455<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
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<td>xbrli:monetaryItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>debit</td>
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<td>instant</td>
</tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 320<br> -SubTopic 10<br> -Section 50<br> -Paragraph 6<br> -Subparagraph (b)(3)<br> -URI https://asc.fasb.org/extlink&amp;oid=126970911&amp;loc=d3e27290-111563<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 326<br> -SubTopic 30<br> -Section 50<br> -Paragraph 4<br> -Subparagraph (b)(3)<br> -URI https://asc.fasb.org/extlink&amp;oid=124269663&amp;loc=SL82922888-210455<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:integerItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
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<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems</td>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031635245024">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Accrued expenses (Details) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Dec. 31, 2021</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AccruedLiabilitiesCurrentAbstract', window );"><strong>Accrued Liabilities, Current [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_AccruedManufacturingExpensesCurrent', window );">Accrued manufacturing expenses</a></td>
<td class="nump">$ 13,230<span></span>
</td>
<td class="nump">$ 8,476<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_AccruedClinicalExpensesCurrent', window );">Accrued clinical expenses</a></td>
<td class="nump">10,972<span></span>
</td>
<td class="nump">7,879<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_AccruedPreclinicalExpensesCurrent', window );">Accrued research and non-clinical expenses</a></td>
<td class="nump">5,811<span></span>
</td>
<td class="nump">3,848<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EmployeeRelatedLiabilitiesCurrent', window );">Accrued payroll and related expenses</a></td>
<td class="nump">9,083<span></span>
</td>
<td class="nump">7,319<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AccruedProfessionalFeesCurrent', window );">Accrued professional fees</a></td>
<td class="nump">1,822<span></span>
</td>
<td class="nump">909<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_OtherAccruedLiabilitiesCurrent', window );">Accrued other</a></td>
<td class="nump">286<span></span>
</td>
<td class="nump">285<span></span>
</td>
</tr>
<tr class="rou">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AccruedLiabilitiesCurrent', window );">Total</a></td>
<td class="nump">$ 41,204<span></span>
</td>
<td class="nump">$ 28,716<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_AccruedClinicalExpensesCurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Carrying value as of the balance sheet date of obligations incurred through that date and payable for clinical expense. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Carrying value as of the balance sheet date of obligations incurred through that date and payable for manufacturing expense. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_AccruedManufacturingExpensesCurrent</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Carrying value as of the balance sheet date of obligations incurred through that date and payable for preclinical expense. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_AccruedPreclinicalExpensesCurrent</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td>xbrli:monetaryItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>credit</td>
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<td><strong> Period Type:</strong></td>
<td>instant</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AccruedLiabilitiesCurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.20)<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AccruedLiabilitiesCurrent</td>
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<tr>
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<td>instant</td>
</tr>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AccruedLiabilitiesCurrentAbstract</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AccruedProfessionalFeesCurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.20)<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AccruedProfessionalFeesCurrent</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td><strong> Balance Type:</strong></td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_EmployeeRelatedLiabilitiesCurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.20)<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_EmployeeRelatedLiabilitiesCurrent</td>
</tr>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td><strong> Data Type:</strong></td>
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</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OtherAccruedLiabilitiesCurrent">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.20)<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_OtherAccruedLiabilitiesCurrent</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
</div>
</body>
</html>
</TEXT>
</DOCUMENT>
<DOCUMENT>
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<DESCRIPTION>IDEA: XBRL DOCUMENT
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<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031636435712">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Debt - Narrative (Details)<br></strong></div></th>
<th class="th" colspan="1"></th>
<th class="th" colspan="2">3 Months Ended</th>
<th class="th" colspan="2">9 Months Ended</th>
</tr>
<tr>
<th class="th">
<div>Oct. 29, 2021 </div>
<div>USD ($) </div>
<div>advance</div>
</th>
<th class="th">
<div>Sep. 30, 2022 </div>
<div>USD ($)</div>
</th>
<th class="th">
<div>Sep. 30, 2021 </div>
<div>USD ($)</div>
</th>
<th class="th">
<div>Sep. 30, 2022 </div>
<div>USD ($)</div>
</th>
<th class="th">
<div>Sep. 30, 2021 </div>
<div>USD ($)</div>
</th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentLineItems', window );"><strong>Debt</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DeferredFinanceCostsNet', window );">Unamortized deferred financing costs</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 100,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 100,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CreditFacilityAxis=us-gaap_LineOfCreditMember', window );">Line of Credit</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentLineItems', window );"><strong>Debt</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_DebtPrincipalAdvances', window );">Principal advances | advance</a></td>
<td class="nump">3<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentAxis=mrsn_NewCreditFacilityMember', window );">New Credit Facility</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentLineItems', window );"><strong>Debt</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_InterestExpenseDebt', window );">Interest expense</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">800,000<span></span>
</td>
<td class="nump">$ 0<span></span>
</td>
<td class="nump">2,300,000<span></span>
</td>
<td class="nump">$ 0<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentAxis=mrsn_NewCreditFacilityMember', window );">New Credit Facility | Line of Credit</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentLineItems', window );"><strong>Debt</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity', window );">Maximum borrowing capacity</a></td>
<td class="nump">$ 100,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ProceedsFromLinesOfCredit', window );">Proceeds from line of credit</a></td>
<td class="nump">25,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentAxis=mrsn_NewCreditFacilityTrancheOneMember', window );">New Credit Facility, Tranche One | Line of Credit</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentLineItems', window );"><strong>Debt</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity', window );">Maximum borrowing capacity</a></td>
<td class="nump">60,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentAxis=mrsn_NewCreditFacilityTrancheTwoMember', window );">New Credit Facility, Tranche Two | Line of Credit</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentLineItems', window );"><strong>Debt</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity', window );">Maximum borrowing capacity</a></td>
<td class="nump">60,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentAxis=mrsn_NewCreditFacilityTrancheThreeMember', window );">New Credit Facility, Tranche Three | Line of Credit</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentLineItems', window );"><strong>Debt</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity', window );">Maximum borrowing capacity</a></td>
<td class="nump">60,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentAxis=mrsn_NewCreditFacilityTrancheFourMember', window );">New Credit Facility, Tranche Four | Line of Credit</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentLineItems', window );"><strong>Debt</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity', window );">Maximum borrowing capacity</a></td>
<td class="nump">$ 20,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_DebtPrincipalAdvances', window );">Principal advances | advance</a></td>
<td class="nump">1<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentAxis=mrsn_NewCreditFacilityTrancheFiveMember', window );">New Credit Facility, Tranche Five | Line of Credit</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentLineItems', window );"><strong>Debt</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity', window );">Maximum borrowing capacity</a></td>
<td class="nump">$ 20,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentAxis=mrsn_AmendedCreditFacilityMember', window );">Amendment To Credit Facility</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentLineItems', window );"><strong>Debt</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_InterestExpenseDebt', window );">Interest expense</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 0<span></span>
</td>
<td class="nump">$ 100,000<span></span>
</td>
<td class="nump">$ 0<span></span>
</td>
<td class="nump">$ 300,000<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentAxis=mrsn_AmendedCreditFacilityMember', window );">Amendment To Credit Facility | Line of Credit</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentLineItems', window );"><strong>Debt</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_RepaymentsOfLinesOfCredit', window );">Repayments of lines of credit</a></td>
<td class="nump">$ 5,500,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_DebtPrincipalAdvances">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Debt, Principal Advances</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_DebtPrincipalAdvances</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:integerItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DebtInstrumentLineItems</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DeferredFinanceCostsNet">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 20<br> -Section 50<br> -Paragraph 1D<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=123466505&amp;loc=SL123495340-112611<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 835<br> -SubTopic 30<br> -Section 45<br> -Paragraph 3<br> -URI https://asc.fasb.org/extlink&amp;oid=124435984&amp;loc=d3e28555-108399<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DeferredFinanceCostsNet</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td><strong> Period Type:</strong></td>
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</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_InterestExpenseDebt">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of the cost of borrowed funds accounted for as interest expense for debt.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 20<br> -Section 50<br> -Paragraph 6<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=123466204&amp;loc=SL6036836-161870<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 220<br> -SubTopic 10<br> -Section S99<br> -Paragraph 2<br> -Subparagraph (SX 210.5-03.8)<br> -URI https://asc.fasb.org/extlink&amp;oid=126953954&amp;loc=SL114868664-224227<br><br>Reference 3: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 20<br> -Section 55<br> -Paragraph 69F<br> -URI https://asc.fasb.org/extlink&amp;oid=123466577&amp;loc=SL123495745-112612<br><br>Reference 4: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 20<br> -Section 55<br> -Paragraph 69E<br> -URI https://asc.fasb.org/extlink&amp;oid=123466577&amp;loc=SL123495743-112612<br><br>Reference 5: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 20<br> -Section 50<br> -Paragraph 1F<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=123466505&amp;loc=SL123495355-112611<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_InterestExpenseDebt</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.19(b),22(b))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
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</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProceedsFromLinesOfCredit">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 14<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3255-108585<br><br>Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 235<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.4-08(f))<br> -URI https://asc.fasb.org/extlink&amp;oid=120395691&amp;loc=d3e23780-122690<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ProceedsFromLinesOfCredit</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_RepaymentsOfLinesOfCredit">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 15<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3291-108585<br><br>Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 235<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.4-08(f))<br> -URI https://asc.fasb.org/extlink&amp;oid=120395691&amp;loc=d3e23780-122690<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_RepaymentsOfLinesOfCredit</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CreditFacilityAxis=us-gaap_LineOfCreditMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CreditFacilityAxis=us-gaap_LineOfCreditMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
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<td><strong> Data Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
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<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtInstrumentAxis=mrsn_NewCreditFacilityMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DebtInstrumentAxis=mrsn_NewCreditFacilityMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtInstrumentAxis=mrsn_NewCreditFacilityTrancheOneMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DebtInstrumentAxis=mrsn_NewCreditFacilityTrancheOneMember</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
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<td><strong> Data Type:</strong></td>
<td>na</td>
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<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtInstrumentAxis=mrsn_NewCreditFacilityTrancheTwoMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DebtInstrumentAxis=mrsn_NewCreditFacilityTrancheTwoMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
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<td><strong> Data Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtInstrumentAxis=mrsn_NewCreditFacilityTrancheThreeMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DebtInstrumentAxis=mrsn_NewCreditFacilityTrancheThreeMember</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
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<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtInstrumentAxis=mrsn_NewCreditFacilityTrancheFourMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DebtInstrumentAxis=mrsn_NewCreditFacilityTrancheFourMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtInstrumentAxis=mrsn_NewCreditFacilityTrancheFiveMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DebtInstrumentAxis=mrsn_NewCreditFacilityTrancheFiveMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
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<td><strong> Data Type:</strong></td>
<td>na</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtInstrumentAxis=mrsn_AmendedCreditFacilityMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DebtInstrumentAxis=mrsn_AmendedCreditFacilityMember</td>
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<td></td>
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<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Debt - Schedule of Debt (Details) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Dec. 31, 2021</div></th>
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<tr class="rou">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentCarryingAmount', window );">Total debt</a></td>
<td class="nump">$ 25,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_LongTermDebtCurrent', window );">Less: Current portion of long-term debt</a></td>
<td class="nump">0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_LongTermDebtNoncurrent', window );">Total debt, net of current portion</a></td>
<td class="nump">25,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentUnamortizedDiscount', window );">Debt financing costs, net of accretion</a></td>
<td class="num">(345)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_DebtInstrumentUnamortizedPremium', window );">Accretion related to final payment</a></td>
<td class="nump">198<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="reu">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_LongTermDebt', window );">Long-term debt, net</a></td>
<td class="nump">$ 24,853<span></span>
</td>
<td class="nump">$ 24,626<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtDisclosureAbstract">
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DebtDisclosureAbstract</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
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<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtInstrumentCarryingAmount">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 20<br> -Section 50<br> -Paragraph 4<br> -Subparagraph (b)(1)<br> -URI https://asc.fasb.org/extlink&amp;oid=123466204&amp;loc=SL6031897-161870<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.7-03(16))<br> -URI https://asc.fasb.org/extlink&amp;oid=126734703&amp;loc=d3e572229-122910<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(22))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-03(16))<br> -URI https://asc.fasb.org/extlink&amp;oid=126897435&amp;loc=d3e534808-122878<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DebtInstrumentCarryingAmount</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtInstrumentUnamortizedDiscount">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount, after accumulated amortization, of debt discount.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 835<br> -SubTopic 30<br> -Section 45<br> -Paragraph 1A<br> -URI https://asc.fasb.org/extlink&amp;oid=124435984&amp;loc=d3e28541-108399<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 835<br> -SubTopic 30<br> -Section 55<br> -Paragraph 8<br> -URI https://asc.fasb.org/extlink&amp;oid=114775985&amp;loc=d3e28878-108400<br><br>Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 20<br> -Section 50<br> -Paragraph 1D<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=123466505&amp;loc=SL123495340-112611<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DebtInstrumentUnamortizedDiscount</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td>xbrli:monetaryItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>debit</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_DebtInstrumentUnamortizedPremium">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount, after accumulated amortization, of debt premium.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 835<br> -SubTopic 30<br> -Section 55<br> -Paragraph 8<br> -URI https://asc.fasb.org/extlink&amp;oid=114775985&amp;loc=d3e28878-108400<br><br>Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 20<br> -Section 50<br> -Paragraph 1D<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=123466505&amp;loc=SL123495340-112611<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 835<br> -SubTopic 30<br> -Section 45<br> -Paragraph 1A<br> -URI https://asc.fasb.org/extlink&amp;oid=124435984&amp;loc=d3e28541-108399<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_DebtInstrumentUnamortizedPremium</td>
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<td>xbrli:monetaryItemType</td>
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<td><strong> Balance Type:</strong></td>
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<td>instant</td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 20<br> -Section 50<br> -Paragraph 4<br> -Subparagraph (b)(3)<br> -URI https://asc.fasb.org/extlink&amp;oid=123466204&amp;loc=SL6031897-161870<br><br>Reference 2: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 20<br> -Section 55<br> -Paragraph 69C<br> -URI https://asc.fasb.org/extlink&amp;oid=123466577&amp;loc=SL123495737-112612<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 944<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.7-03(a)(16))<br> -URI https://asc.fasb.org/extlink&amp;oid=126734703&amp;loc=d3e572229-122910<br><br>Reference 4: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 20<br> -Section 55<br> -Paragraph 69B<br> -URI https://asc.fasb.org/extlink&amp;oid=123466577&amp;loc=SL123495735-112612<br><br>Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 942<br> -SubTopic 210<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.9-03(16))<br> -URI https://asc.fasb.org/extlink&amp;oid=126897435&amp;loc=d3e534808-122878<br><br>Reference 6: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 470<br> -SubTopic 20<br> -Section 50<br> -Paragraph 1D<br> -Subparagraph (b)<br> -URI https://asc.fasb.org/extlink&amp;oid=123466505&amp;loc=SL123495340-112611<br><br>Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(22))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_LongTermDebt</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<td><strong> Balance Type:</strong></td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LongTermDebtCurrent">
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.19,20)<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_LongTermDebtCurrent</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td>xbrli:monetaryItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>credit</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_LongTermDebtNoncurrent">
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(22))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_LongTermDebtNoncurrent</td>
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<td>xbrli:monetaryItemType</td>
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<td>credit</td>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031639418416">
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<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Stockholders' equity - Narrative (Details) - USD ($)<br></strong></div></th>
<th class="th" colspan="4">3 Months Ended</th>
<th class="th" colspan="2">9 Months Ended</th>
<th class="th" colspan="1">12 Months Ended</th>
<th class="th" colspan="1"></th>
<th class="th" colspan="1"></th>
<th class="th" colspan="1"></th>
<th class="th" colspan="1"></th>
<th class="th" colspan="1"></th>
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<tr>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Jun. 30, 2022</div></th>
<th class="th"><div>Mar. 31, 2022</div></th>
<th class="th"><div>Jun. 30, 2021</div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
<th class="th"><div>Dec. 31, 2013</div></th>
<th class="th"><div>Jun. 09, 2022</div></th>
<th class="th"><div>Jun. 08, 2022</div></th>
<th class="th"><div>Feb. 28, 2022</div></th>
<th class="th"><div>Dec. 31, 2021</div></th>
<th class="th"><div>May 31, 2020</div></th>
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<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_PreferredStockSharesAuthorized', window );">Preferred stock, shares authorized (in shares)</a></td>
<td class="nump">25,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">25,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">25,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
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<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_PreferredStockSharesIssued', window );">Preferred stock, shares issued (in shares)</a></td>
<td class="nump">0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">0<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ProceedsFromIssuanceOfCommonStock', window );">Net proceeds from public offering of common stock</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 110,954,000<span></span>
</td>
<td class="nump">$ 33,287,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_ClassOfWarrantOrRightSecuritiesCalledByWarrantsOrRightsNumberIssued', window );">Number of shares into which warrant issued during period may be converted (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">129,491<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1', window );">Warrant exercise price per share (in dollars per share)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 0.05<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_ContractualLifeOfWarrants', window );">Contractual life of warrants</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">10 years<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights', window );">Number of shares of common stock into which warrants may be converted (in shares)</a></td>
<td class="nump">22,590<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">22,590<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CommonStockParOrStatedValuePerShare', window );">Common stock, par value (in dollars per share)</a></td>
<td class="nump">$ 0.0001<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 0.0001<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 0.0001<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 0.0001<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CommonStockSharesAuthorized', window );">Common stock, shares authorized (in shares)</a></td>
<td class="nump">350,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">350,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">350,000,000<span></span>
</td>
<td class="nump">175,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">175,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CommonStockVotingRights', window );">Common stock voting rights</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">The holders of the common stock are entitled to one vote for each share held.<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember', window );">Common&#160;Stock</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ClassOfStockLineItems', window );"><strong>Class of Stock [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodSharesNewIssues', window );">Issuance of common stock under public offering, net of issuance costs (in shares)</a></td>
<td class="nump">1,382,631<span></span>
</td>
<td class="nump">9,904,964<span></span>
</td>
<td class="nump">13,169,903<span></span>
</td>
<td class="nump">2,271,074<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_WarrantsExercisedInPeriod', window );">Exercise of common stock warrant in exchange for common stock (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">16,654<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">16,654<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SubsidiarySaleOfStockAxis=mrsn_AtMarketEquityOfferingProgram2020ATMMember', window );">2020 ATM</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ClassOfStockLineItems', window );"><strong>Class of Stock [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_StockIssuanceProgramAuthorizedAmount', window );">Amount of shares authorized to be offered and sold</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 100,000,000<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SubsidiarySaleOfStockAxis=mrsn_AtMarketEquityOfferingProgram2020ATMMember', window );">2020 ATM | Common&#160;Stock</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ClassOfStockLineItems', window );"><strong>Class of Stock [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodSharesNewIssues', window );">Issuance of common stock under public offering, net of issuance costs (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">11,740,210<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ProceedsFromIssuanceOfCommonStock', window );">Net proceeds from public offering of common stock</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 54,800,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SubsidiarySaleOfStockAxis=mrsn_AtMarketEquityOfferingProgram2022ATMMember', window );">2022 ATM</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ClassOfStockLineItems', window );"><strong>Class of Stock [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_StockIssuanceProgramAuthorizedAmount', window );">Amount of shares authorized to be offered and sold</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 100,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SubsidiarySaleOfStockAxis=mrsn_AtMarketEquityOfferingProgram2022ATMMember', window );">2022 ATM | Common&#160;Stock</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ClassOfStockLineItems', window );"><strong>Class of Stock [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodSharesNewIssues', window );">Issuance of common stock under public offering, net of issuance costs (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">12,717,288<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ProceedsFromIssuanceOfCommonStock', window );">Net proceeds from public offering of common stock</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 56,500,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_StockIssuanceProgramRemainingUnsoldAndAvailableAmount', window );">Remaining unsold and available amount</a></td>
<td class="nump">$ 42,400,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 42,400,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_ClassOfWarrantOrRightSecuritiesCalledByWarrantsOrRightsNumberIssued">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of securities into which the class of warrant or right issued during the period may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_ClassOfWarrantOrRightSecuritiesCalledByWarrantsOrRightsNumberIssued</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_ContractualLifeOfWarrants">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The contractual life of warrants.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_ContractualLifeOfWarrants</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:durationItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_StockIssuanceProgramAuthorizedAmount">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of common stock shares authorized to be issued under the program.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_StockIssuanceProgramAuthorizedAmount</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_StockIssuanceProgramRemainingUnsoldAndAvailableAmount">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Value of shares that remain unsold and available under a stock issuance program.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_StockIssuanceProgramRemainingUnsoldAndAvailableAmount</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>credit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_WarrantsExercisedInPeriod">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Shares of stock issued as a result of the exercise of warrants.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_WarrantsExercisedInPeriod</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ClassOfStockLineItems">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ClassOfStockLineItems</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Exercise price per share or per unit of warrants or rights outstanding.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section 50<br> -Paragraph 3<br> -URI https://asc.fasb.org/extlink&amp;oid=126973232&amp;loc=d3e21475-112644<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dtr-types:perShareItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section 50<br> -Paragraph 3<br> -URI https://asc.fasb.org/extlink&amp;oid=126973232&amp;loc=d3e21475-112644<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CommonStockParOrStatedValuePerShare">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Face amount or stated value per share of common stock.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CommonStockParOrStatedValuePerShare</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dtr-types:perShareItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CommonStockSharesAuthorized">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The maximum number of common shares permitted to be issued by an entity's charter and bylaws.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CommonStockSharesAuthorized</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CommonStockVotingRights">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Description of voting rights of common stock. Includes eligibility to vote and votes per share owned. Include also, if any, unusual voting rights.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section 50<br> -Paragraph 3<br> -URI https://asc.fasb.org/extlink&amp;oid=126973232&amp;loc=d3e21475-112644<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CommonStockVotingRights</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PreferredStockSharesAuthorized">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(28))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PreferredStockSharesAuthorized</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_PreferredStockSharesIssued">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(28))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section 50<br> -Paragraph 13<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126973232&amp;loc=SL123496158-112644<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PreferredStockSharesIssued</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProceedsFromIssuanceOfCommonStock">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The cash inflow from the additional capital contribution to the entity.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 14<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3255-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ProceedsFromIssuanceOfCommonStock</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockIssuedDuringPeriodSharesNewIssues">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of new stock issued during the period.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=126973232&amp;loc=d3e21463-112644<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.3-04)<br> -URI https://asc.fasb.org/extlink&amp;oid=120397183&amp;loc=d3e187085-122770<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(28))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StockIssuedDuringPeriodSharesNewIssues</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
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<td>na</td>
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<td></td>
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<td><strong> Period Type:</strong></td>
<td></td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_SubsidiarySaleOfStockAxis=mrsn_AtMarketEquityOfferingProgram2020ATMMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_SubsidiarySaleOfStockAxis=mrsn_AtMarketEquityOfferingProgram2020ATMMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
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<tr>
<td><strong> Period Type:</strong></td>
<td></td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_SubsidiarySaleOfStockAxis=mrsn_AtMarketEquityOfferingProgram2022ATMMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_SubsidiarySaleOfStockAxis=mrsn_AtMarketEquityOfferingProgram2022ATMMember</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
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<td><strong> Data Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
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<tr>
<td><strong> Period Type:</strong></td>
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<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031640237328">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Stockholders' equity - Common stock (Details) - shares<br></strong></div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Dec. 31, 2021</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract', window );"><strong>Common stock</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance', window );">Number of shares reserved for future issuance (in shares)</a></td>
<td class="nump">12,418,052<span></span>
</td>
<td class="nump">9,199,512<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StatementEquityComponentsAxis=us-gaap_DeferredCompensationShareBasedPaymentsMember', window );">Share-based payments | Stock options</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract', window );"><strong>Common stock</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance', window );">Number of shares reserved for future issuance (in shares)</a></td>
<td class="nump">10,524,780<span></span>
</td>
<td class="nump">8,342,429<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StatementEquityComponentsAxis=us-gaap_DeferredCompensationShareBasedPaymentsMember', window );">Share-based payments | Restricted stock units</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract', window );"><strong>Common stock</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance', window );">Number of shares reserved for future issuance (in shares)</a></td>
<td class="nump">1,870,682<span></span>
</td>
<td class="nump">817,609<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StatementEquityComponentsAxis=us-gaap_WarrantMember', window );">Warrants</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract', window );"><strong>Common stock</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance', window );">Number of shares reserved for future issuance (in shares)</a></td>
<td class="nump">22,590<span></span>
</td>
<td class="nump">39,474<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Aggregate number of common shares reserved for future issuance.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02.29)<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CommonStockCapitalSharesReservedForFutureIssuance</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract</td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StatementEquityComponentsAxis=us-gaap_DeferredCompensationShareBasedPaymentsMember</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
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<td><strong> Data Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
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<tr>
<td><strong> Period Type:</strong></td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
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<td><strong> Data Type:</strong></td>
<td>na</td>
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<td><strong> Balance Type:</strong></td>
<td></td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
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<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StatementEquityComponentsAxis=us-gaap_WarrantMember</td>
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<td><strong> Data Type:</strong></td>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031635945520">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Stock-based compensation - Plans Narrative (Details) - USD ($)<br> $ / shares in Units, $ in Thousands</strong></div></th>
<th class="th" colspan="1"></th>
<th class="th" colspan="1">1 Months Ended</th>
<th class="th" colspan="2">3 Months Ended</th>
<th class="th" colspan="2">9 Months Ended</th>
<th class="th" colspan="1"></th>
<th class="th" colspan="1"></th>
</tr>
<tr>
<th class="th"><div>Jan. 01, 2022</div></th>
<th class="th"><div>Jun. 30, 2017</div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
<th class="th"><div>Feb. 28, 2022</div></th>
<th class="th"><div>Dec. 31, 2021</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber', window );">Number of shares outstanding (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">10,524,780<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">10,524,780<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">8,342,429<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue', window );">Weighted-average grant date fair value of options granted (in dollars per share)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 3.96<span></span>
</td>
<td class="nump">$ 12.37<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue', window );">Share-Based compensation arrangement by share-based payment award, options, exercises in period, intrinsic value</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 100<span></span>
</td>
<td class="nump">$ 3,900<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ProceedsFromStockOptionsExercised', window );">Cash received from the exercise of stock options</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 206<span></span>
</td>
<td class="nump">$ 1,545<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate', window );">Expected dividend yield</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">0.00%<span></span>
</td>
<td class="nump">0.00%<span></span>
</td>
<td class="nump">0.00%<span></span>
</td>
<td class="nump">0.00%<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember', window );">Stock options</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions', window );">Unrecognized stock compensation cost</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 34,500<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 34,500<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1', window );">Weighted-average amortization period of unrecognized stock compensation cost</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">2 years 2 months 12 days<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember', window );">Restricted stock units</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions', window );">Unrecognized stock compensation cost</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 12,600<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">$ 12,600<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1', window );">Weighted-average amortization period of unrecognized stock compensation cost</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">2 years 9 months 18 days<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember', window );">Restricted stock units | Maximum</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1', window );">Vesting period</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">4 years<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember', window );">Restricted stock units | Minimum</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1', window );">Vesting period</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">1 year<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_PlanNameAxis=mrsn_StockIncentivePlan2007Member', window );">2007 Plan</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber', window );">Number of shares outstanding (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">3,141,625<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_PlanNameAxis=mrsn_StockIncentivePlan2017Member', window );">2017 Plan</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized', window );">Number of shares authorized (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">2,255,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximumCumulativeAnnualIncrease', window );">Cumulative annual increase in number of shares issuable</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">4.00%<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized', window );">Additional shares authorized (in shares)</a></td>
<td class="nump">2,948,362<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant', window );">Number of shares available for future issuance (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">1,372,006<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">1,372,006<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardGrantsInPeriodGross', window );">Number of options granted in period (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">3,532,433<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_PlanNameAxis=mrsn_StockIncentivePlan2017Member', window );">2017 Plan | Maximum</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod', window );">Expiration period</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">10 years<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_PlanNameAxis=mrsn_StockIncentivePlan2017Member', window );">2017 Plan | Stock options</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1', window );">Vesting period</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">4 years<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_PlanNameAxis=mrsn_InducementAwardProgramMember', window );">Inducement award program</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized', window );">Number of shares authorized (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">2,000,000<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant', window );">Number of shares available for future issuance (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">1,403,975<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">1,403,975<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl custom" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_mrsn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardGrantsInPeriodGross', window );">Number of options granted in period (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">612,450<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_PlanNameAxis=mrsn_InducementAwardPriorToInducementAwardProgramMember', window );">Inducement award prior to inducement award program</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber', window );">Number of shares outstanding (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">757,500<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">757,500<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_PlanNameAxis=mrsn_A2017ESPPMember', window );">2017 ESPP</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant', window );">Number of shares available for future issuance (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">412,330<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">412,330<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans', window );">Purchase of common stock under ESPP (in shares)</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="nump">154,235<span></span>
</td>
<td class="nump">36,198<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximumCumulativeAnnualIncrease">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Maximum number of shares that may be cumulatively increased annually in accordance with the plan, as a percentage of outstanding capital stock.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximumCumulativeAnnualIncrease</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dtr-types:percentItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_mrsn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardGrantsInPeriodGross">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The number of grants made during the period for share options (or share units) and for other than stock (or unit) options, including but not limited to, restricted stock options (or units). This amount does not include options granted as part of an inducement award.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">mrsn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardGrantsInPeriodGross</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>mrsn_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (i)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:durationItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of cost to be recognized for option under share-based payment arrangement.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (i)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ProceedsFromStockOptionsExercised">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of cash inflow from exercise of option under share-based payment arrangement.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2A<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=SL79508275-113901<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 230<br> -SubTopic 10<br> -Section 45<br> -Paragraph 14<br> -Subparagraph (a)<br> -URI https://asc.fasb.org/extlink&amp;oid=126954810&amp;loc=d3e3255-108585<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ProceedsFromStockOptionsExercised</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (a)(1)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:durationItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (f)(2)(iii)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dtr-types:percentItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of additional shares authorized for issuance under share-based payment arrangement.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of shares authorized for issuance under share-based payment arrangement.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (a)(3)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (d)(2)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (d)(1)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dtr-types:perShareItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of options outstanding, including both vested and non-vested options.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(1)(ii)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(1)(i)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/exampleRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (a)(2)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:durationItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of shares issued during the period as a result of an employee stock purchase plan.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=126973232&amp;loc=d3e21463-112644<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.3-04)<br> -URI https://asc.fasb.org/extlink&amp;oid=120397183&amp;loc=d3e187085-122770<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(28))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td></td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td></td>
</tr>
</table></div>
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<td><strong> Name:</strong></td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
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<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PlanNameAxis=mrsn_StockIncentivePlan2007Member</td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PlanNameAxis=mrsn_StockIncentivePlan2017Member</td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PlanNameAxis=mrsn_InducementAwardProgramMember</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PlanNameAxis=mrsn_InducementAwardPriorToInducementAwardProgramMember</td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_PlanNameAxis=mrsn_A2017ESPPMember</td>
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<DOCUMENT>
<TYPE>XML
<SEQUENCE>55
<FILENAME>R45.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
							function toggleNextSibling (e) {
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<body>
<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031635284016">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Stock-based compensation - Activity Under Stock Option Plan (Details) - $ / shares<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
</tr>
<tr><th class="th"><div>Sep. 30, 2022</div></th></tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward', window );"><strong>Number of&#160;Shares</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber', window );">Outstanding at beginning of period (in shares)</a></td>
<td class="nump">8,342,429<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross', window );">Granted (in shares)</a></td>
<td class="nump">2,765,034<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised', window );">Exercised (in shares)</a></td>
<td class="num">(54,299)<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod', window );">Cancelled (in shares)</a></td>
<td class="num">(528,384)<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber', window );">Outstanding at end of period (in shares)</a></td>
<td class="nump">10,524,780<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber', window );">Vested and expected to vest (in shares)</a></td>
<td class="nump">10,524,780<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber', window );">Options exercisable, at end of period (in shares)</a></td>
<td class="nump">5,339,351<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward', window );"><strong>Weighted- Average Exercise&#160;Price</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice', window );">Outstanding at beginning of period (in dollars per share)</a></td>
<td class="nump">$ 11.25<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice', window );">Granted (in dollars per share)</a></td>
<td class="nump">5.41<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice', window );">Exercised (in dollars per share)</a></td>
<td class="nump">3.81<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice', window );">Cancelled (in dollars per share)</a></td>
<td class="nump">13.33<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice', window );">Outstanding at end of period (in dollars per share)</a></td>
<td class="nump">9.65<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice', window );">Vested and expected to vest (in dollars per share)</a></td>
<td class="nump">9.65<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice', window );">Options exercisable, at end of period (in dollars per share)</a></td>
<td class="nump">$ 8.96<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(1)(iii)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(1)(iii)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dtr-types:perShareItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(1)(iv)(04)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Gross number of share options (or share units) granted during the period.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(1)(iv)(01)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of options outstanding, including both vested and non-vested options.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(1)(ii)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(1)(i)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber</td>
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<td>na</td>
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<td>instant</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward</td>
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<td>xbrli:stringItemType</td>
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<td><strong> Balance Type:</strong></td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(1)(ii)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(1)(i)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dtr-types:perShareItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
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<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<td>duration</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (e)(1)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (e)(1)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td><strong> Data Type:</strong></td>
<td>dtr-types:perShareItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Weighted average price at which option holders acquired shares when converting their stock options into shares.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(1)(iv)(02)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td><strong> Data Type:</strong></td>
<td>dtr-types:perShareItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(1)(iv)(04)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<td><strong> Data Type:</strong></td>
<td>dtr-types:perShareItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(1)(iv)(01)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>dtr-types:perShareItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Number of share options (or share units) exercised during the current period.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(1)(iv)(02)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br><br>Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.3-04)<br> -URI https://asc.fasb.org/extlink&amp;oid=120397183&amp;loc=d3e187085-122770<br><br>Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(28))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 210<br> -SubTopic 10<br> -Section S99<br> -Paragraph 1<br> -Subparagraph (SX 210.5-02(29))<br> -URI https://asc.fasb.org/extlink&amp;oid=120391452&amp;loc=d3e13212-122682<br><br>Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 505<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -URI https://asc.fasb.org/extlink&amp;oid=126973232&amp;loc=d3e21463-112644<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised</td>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031646713216">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Stock-based compensation - Restricted Stock Units (Details) - Restricted stock units - shares<br></strong></div></th>
<th class="th" colspan="1">9 Months Ended</th>
<th class="th" colspan="1"></th>
</tr>
<tr>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Dec. 31, 2021</div></th>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber', window );">Awards outstanding (in shares)</a></td>
<td class="nump">1,870,682<span></span>
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<td class="nump">817,609<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod', window );">Granted (in shares)</a></td>
<td class="nump">1,379,849<span></span>
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<td class="text">&#160;<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod', window );">Vested (in shares)</a></td>
<td class="num">(190,841)<span></span>
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<td class="text">&#160;<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod', window );">Share-based compensation arrangement by share-based payment award, equity instruments other than options, forfeited in period</a></td>
<td class="num">(135,935)<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(2)(iii)(03)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(2)(iii)(01)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(2)(ii)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br><br>Reference 2: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(2)(i)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>instant</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (c)(2)(iii)(02)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<td><strong> Period Type:</strong></td>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td>xbrli:stringItemType</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031640628192">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Stock-based compensation - Stock Based Compensation Expense by Award Type (Details) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="2">3 Months Ended</th>
<th class="th" colspan="2">9 Months Ended</th>
</tr>
<tr>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
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<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AllocatedShareBasedCompensationExpense', window );">Stock-based compensation expense included in total operating expenses</a></td>
<td class="nump">$ 5,375<span></span>
</td>
<td class="nump">$ 4,928<span></span>
</td>
<td class="nump">$ 16,208<span></span>
</td>
<td class="nump">$ 13,549<span></span>
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<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember', window );">Stock options</a></td>
<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
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<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AllocatedShareBasedCompensationExpense', window );">Stock-based compensation expense included in total operating expenses</a></td>
<td class="nump">3,901<span></span>
</td>
<td class="nump">3,986<span></span>
</td>
<td class="nump">11,952<span></span>
</td>
<td class="nump">10,617<span></span>
</td>
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<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember', window );">Restricted stock units</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AllocatedShareBasedCompensationExpense', window );">Stock-based compensation expense included in total operating expenses</a></td>
<td class="nump">1,365<span></span>
</td>
<td class="nump">881<span></span>
</td>
<td class="nump">3,832<span></span>
</td>
<td class="nump">2,636<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AwardTypeAxis=us-gaap_EmployeeStockMember', window );">Employee stock purchase plan</a></td>
<td class="text">&#160;<span></span>
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<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AllocatedShareBasedCompensationExpense', window );">Stock-based compensation expense included in total operating expenses</a></td>
<td class="nump">$ 109<span></span>
</td>
<td class="nump">$ 61<span></span>
</td>
<td class="nump">$ 424<span></span>
</td>
<td class="nump">$ 296<span></span>
</td>
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<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AllocatedShareBasedCompensationExpense">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (h)(1)(i)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AllocatedShareBasedCompensationExpense</td>
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<td>xbrli:monetaryItemType</td>
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<tr>
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<td>duration</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
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<td><strong> Name:</strong></td>
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<DOCUMENT>
<TYPE>XML
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<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031636244320">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Stock-based compensation - Schedule of Stock-Based Compensation Expense as Reflected in the Company's Condensed Consolidated Statements of Operations and Comprehensive Loss (Details) - USD ($)<br> $ in Thousands</strong></div></th>
<th class="th" colspan="2">3 Months Ended</th>
<th class="th" colspan="2">9 Months Ended</th>
</tr>
<tr>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AllocatedShareBasedCompensationExpense', window );">Share-based compensation expense</a></td>
<td class="nump">$ 5,375<span></span>
</td>
<td class="nump">$ 4,928<span></span>
</td>
<td class="nump">$ 16,208<span></span>
</td>
<td class="nump">$ 13,549<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_IncomeStatementLocationAxis=us-gaap_ResearchAndDevelopmentExpenseMember', window );">Research and development</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AllocatedShareBasedCompensationExpense', window );">Share-based compensation expense</a></td>
<td class="nump">2,890<span></span>
</td>
<td class="nump">2,607<span></span>
</td>
<td class="nump">8,569<span></span>
</td>
<td class="nump">7,410<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_IncomeStatementLocationAxis=us-gaap_GeneralAndAdministrativeExpenseMember', window );">General and administrative</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems', window );"><strong>Stock options</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AllocatedShareBasedCompensationExpense', window );">Share-based compensation expense</a></td>
<td class="nump">$ 2,485<span></span>
</td>
<td class="nump">$ 2,321<span></span>
</td>
<td class="nump">$ 7,639<span></span>
</td>
<td class="nump">$ 6,139<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AllocatedShareBasedCompensationExpense">
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (h)(1)(i)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AllocatedShareBasedCompensationExpense</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:monetaryItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>debit</td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
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</table></div>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_IncomeStatementLocationAxis=us-gaap_ResearchAndDevelopmentExpenseMember</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td><strong> Data Type:</strong></td>
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<td><strong> Balance Type:</strong></td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_IncomeStatementLocationAxis=us-gaap_GeneralAndAdministrativeExpenseMember</td>
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<DOCUMENT>
<TYPE>XML
<SEQUENCE>59
<FILENAME>R49.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
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<body>
<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031646689072">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Stock-based compensation - Fair Value Assumptions (Details)<br></strong></div></th>
<th class="th" colspan="2">3 Months Ended</th>
<th class="th" colspan="2">9 Months Ended</th>
</tr>
<tr>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract', window );"><strong>Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate', window );">Risk-free interest rate</a></td>
<td class="nump">2.90%<span></span>
</td>
<td class="nump">1.00%<span></span>
</td>
<td class="nump">2.00%<span></span>
</td>
<td class="nump">0.80%<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate', window );">Expected dividend yield</a></td>
<td class="nump">0.00%<span></span>
</td>
<td class="nump">0.00%<span></span>
</td>
<td class="nump">0.00%<span></span>
</td>
<td class="nump">0.00%<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1', window );">Expected term (years)</a></td>
<td class="text">6 years 1 month 9 days<span></span>
</td>
<td class="text">6 years 1 month 9 days<span></span>
</td>
<td class="text">5 years 11 months 26 days<span></span>
</td>
<td class="text">6 years 18 days<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate', window );">Expected stock price volatility</a></td>
<td class="nump">94.00%<span></span>
</td>
<td class="nump">82.00%<span></span>
</td>
<td class="nump">88.00%<span></span>
</td>
<td class="nump">83.00%<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract">
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract</td>
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<td>xbrli:stringItemType</td>
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<td><strong> Period Type:</strong></td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (f)(2)(iii)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>dtr-types:percentItemType</td>
</tr>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (f)(2)(ii)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td><strong> Data Type:</strong></td>
<td>dtr-types:percentItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The risk-free interest rate assumption that is used in valuing an option on its own shares.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (f)(2)(iv)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td>dtr-types:percentItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
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<td><strong> Period Type:</strong></td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 718<br> -SubTopic 10<br> -Section 50<br> -Paragraph 2<br> -Subparagraph (f)(2)(i)<br> -URI https://asc.fasb.org/extlink&amp;oid=128089324&amp;loc=d3e5070-113901<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:durationItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
</div>
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</html>
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<DOCUMENT>
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<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031640604160">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Net loss per share (Details) - shares<br></strong></div></th>
<th class="th" colspan="2">3 Months Ended</th>
<th class="th" colspan="2">9 Months Ended</th>
</tr>
<tr>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems', window );"><strong>Anti-dilutive securities</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount', window );">Anti-dilutive securities (in shares)</a></td>
<td class="nump">12,418,052<span></span>
</td>
<td class="nump">9,055,489<span></span>
</td>
<td class="nump">12,418,052<span></span>
</td>
<td class="nump">9,055,489<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=us-gaap_EmployeeStockOptionMember', window );">Stock options</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems', window );"><strong>Anti-dilutive securities</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount', window );">Anti-dilutive securities (in shares)</a></td>
<td class="nump">10,524,780<span></span>
</td>
<td class="nump">8,215,549<span></span>
</td>
<td class="nump">10,524,780<span></span>
</td>
<td class="nump">8,215,549<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=us-gaap_RestrictedStockUnitsRSUMember', window );">Unvested restricted stock units</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems', window );"><strong>Anti-dilutive securities</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount', window );">Anti-dilutive securities (in shares)</a></td>
<td class="nump">1,870,682<span></span>
</td>
<td class="nump">800,466<span></span>
</td>
<td class="nump">1,870,682<span></span>
</td>
<td class="nump">800,466<span></span>
</td>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=us-gaap_WarrantMember', window );">Warrants</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems', window );"><strong>Anti-dilutive securities</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount', window );">Anti-dilutive securities (in shares)</a></td>
<td class="nump">22,590<span></span>
</td>
<td class="nump">39,474<span></span>
</td>
<td class="nump">22,590<span></span>
</td>
<td class="nump">39,474<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/disclosureRef<br> -Publisher FASB<br> -Name Accounting Standards Codification<br> -Topic 260<br> -SubTopic 10<br> -Section 50<br> -Paragraph 1<br> -Subparagraph (c)<br> -URI https://asc.fasb.org/extlink&amp;oid=124432515&amp;loc=d3e3550-109257<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>us-gaap_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:sharesItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td>xbrli:stringItemType</td>
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=us-gaap_EmployeeStockOptionMember</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td></td>
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<td><strong> Data Type:</strong></td>
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<td><strong> Period Type:</strong></td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=us-gaap_RestrictedStockUnitsRSUMember</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Details</a><div><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=us-gaap_WarrantMember</td>
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<span style="display: none;">v3.22.2.2</span><table class="report" border="0" cellspacing="2" id="idm140031636184848">
<tr>
<th class="tl" colspan="1" rowspan="2"><div style="width: 200px;"><strong>Commitments (Details) - USD ($)<br> $ in Millions</strong></div></th>
<th class="th" colspan="2">3 Months Ended</th>
<th class="th" colspan="2">9 Months Ended</th>
</tr>
<tr>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
<th class="th"><div>Sep. 30, 2022</div></th>
<th class="th"><div>Sep. 30, 2021</div></th>
</tr>
<tr class="rh">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis=mrsn_LicenseAgreementUpfrontPaymentsMember', window );">License Agreement, Upfront Payments</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_OtherCommitmentsLineItems', window );"><strong>Commitments</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
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<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersCostsIncurredGross', window );">Research and development expense</a></td>
<td class="nump">$ 0.0<span></span>
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<td class="nump">$ 0.0<span></span>
</td>
<td class="nump">$ 1.5<span></span>
</td>
<td class="nump">$ 0.0<span></span>
</td>
</tr>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis=mrsn_LicenseAgreementMilestonePaymentsMember', window );">License Agreement, Milestone Payments</a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
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<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_OtherCommitmentsLineItems', window );"><strong>Commitments</strong></a></td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
<td class="text">&#160;<span></span>
</td>
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<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersCostsIncurredGross', window );">Research and development expense</a></td>
<td class="nump">$ 0.7<span></span>
</td>
<td class="nump">$ 1.2<span></span>
</td>
<td class="nump">$ 0.7<span></span>
</td>
<td class="nump">$ 2.1<span></span>
</td>
</tr>
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<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_OtherCommitmentsLineItems">
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">us-gaap_OtherCommitmentsLineItems</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersCostsIncurredGross">
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<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The amount of costs incurred under a research and development arrangement accounted for as a contract to perform research and development for others.</p></div>
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The Company&#x2019;s innovative platforms include Dolaflexin and Dolasynthen, each of which deliver the DolaLock payload, as well as Immunosynthen, which delivers the novel stimulator of interferon genes ("STING") agonist ImmunoLock payload. The Company&#x2019;s product candidates include upifitamab rilsodotin ("UpRi"), XMT-1660 and XMT-2056. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company's lead product candidate, UpRi, is a first-in-class Dolaflexin ADC targeting NaPi2b, an antigen broadly expressed in ovarian cancer and other cancers with limited expression in healthy tissues. The Company is currently evaluating UpRi in platinum-resistant ovarian cancer in a single-arm registrational trial, referred to as UPLIFT. The Company is also conducting a placebo-controlled Phase 3 clinical trial, referred to as UP-NEXT, to investigate UpRi as a single-agent maintenance treatment in patients with platinum-sensitive ovarian cancer that have high NaPi2b expression. Additionally, the Company is conducting a Phase 1/2  combination trial, referred to as UPGRADE-A. UPGRADE-A is exploring the combination of UpRi with carboplatin, a standard platinum chemotherapy broadly used in the treatment of platinum-sensitive ovarian cancer. The Company may explore other combinations as part of a series of UPGRADE trials in the future.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company is also investigating XMT-1660, a B7-H4-directed Dolasynthen ADC, in a Phase 1 clinical trial enrolling patients with solid tumors, including in breast, endometrial and ovarian cancers. Additionally, the Company is developing XMT-2056, an Immunosynthen STING-agonist ADC that targets a novel epitope of human epidermal growth factor receptor 2 ("HER2"). The Company also has two additional earlier stage preclinical candidates, XMT-2068 and XMT-2175, that leverage the Company's Immunosynthen platform and target tumor-associated antigens.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company is subject to risks common to companies in the biotechnology industry including, but not limited to, the need for additional capital, risks of failure of preclinical studies and clinical trials, the need to obtain marketing approval and reimbursement for any drug product candidate that it may identify and develop, the need to successfully commercialize and gain market acceptance of its product candidates, dependence on key personnel, protection of proprietary technology, compliance with government regulations, development of technological innovations by competitors, reliance on third party manufacturers and the ability to transition from pilot-scale production to large-scale manufacturing of products.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company has incurred cumulative net losses since inception. For the three months ended September&#160;30, 2022, the net loss was $59.8 million, compared to $45.5 million in the three months ended September&#160;30, 2021. For the nine months ended September&#160;30, 2022, the net loss was $159.3 million, compared to $121.1 million in the nine months ended September&#160;30, 2021. The Company expects to continue to incur operating losses for at least the next several years. As of September&#160;30, 2022, the Company had an accumulated deficit of $609.8 million. The future success of the Company is dependent on, among other factors, its ability to identify and develop its product candidates and ultimately upon its ability to attain profitable operations. The Company has devoted substantially all of its financial resources and efforts to research and development and general and administrative expense to support such research and development. Net losses and negative operating cash flows have had, and will continue to have, an adverse effect on the Company&#x2019;s stockholders' equity and working&#160;capital.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company believes that its currently available funds will be sufficient to fund the Company&#x2019;s operations through at least the next twelve months from the issuance of this Quarterly Report on Form 10-Q. Management&#x2019;s belief with respect to its ability to fund operations is based on estimates that are subject to risks and uncertainties. If actual results are different from management&#x2019;s estimates, the Company may need to seek additional funding.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company&#x2019;s unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States ("U.S.&#160;GAAP") and the rules and regulations of the Securities and Exchange Commission ("SEC"). Any reference in these notes to applicable guidance is meant to refer to the authoritative U.S. GAAP as found in the Accounting Standards Codification ("ASC") and Accounting Standards Updates ("ASU") of the Financial Accounting Standards Board ("FASB").&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with U.S. GAAP have been condensed or omitted from this report, as is permitted by such rules and regulations. Accordingly, these financial statements should be read in conjunction with the audited financial statements as of and for the year ended December&#160;31, 2021 and the notes thereto, included in the Company&#x2019;s Annual Report on Form 10-K for the year ended December 31, 2021, filed with the SEC on February 28, 2022.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The unaudited condensed consolidated financial statements have been prepared on the same basis as the audited financial statements. In the opinion of the Company&#x2019;s management, the accompanying unaudited condensed consolidated financial statements contain all adjustments that are necessary to present fairly the Company&#x2019;s financial position as of September&#160;30, 2022, the results of its operations for the three and nine months ended September&#160;30, 2022 and 2021, the statements of stockholders&#x2019; equity for the three and nine months ended September&#160;30, 2022 and 2021 and statements of cash flows for the nine months ended September&#160;30, 2022 and 2021. Such adjustments are of a normal and recurring nature. The results for the three and nine months ended September&#160;30, 2022 are not necessarily indicative of the results for the year ending December&#160;31, 2022, or for any future period.&lt;/span&gt;&lt;/div&gt;</us-gaap:BusinessDescriptionAndBasisOfPresentationTextBlock>
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      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18zNy9mcmFnOmYzNjkzMGM3YmE4YTRmYjc5YzkwMTU3NTQ3YjQ5MDUxL3RleHRyZWdpb246ZjM2OTMwYzdiYThhNGZiNzljOTAxNTc1NDdiNDkwNTFfNjA4Nw_afa81b79-bae9-4cb8-829c-7a73b16af007">Summary of significant accounting policies&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Principles of Consolidation&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The accompanying unaudited condensed consolidated financial statements include those of the Company and its wholly owned subsidiary, Mersana Securities Corp. All intercompany balances and transactions have been eliminated.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Use of Estimates&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The preparation of the Company&#x2019;s unaudited condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, equity, revenue, expenses and related disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenue and expenses during the reporting period. On an ongoing basis, the Company&#x2019;s management evaluates its estimates which include, but are not limited to, management&#x2019;s judgments with respect to the identification of performance obligations and standalone selling prices of those performance obligations within its revenue arrangements, accrued preclinical, manufacturing and clinical expenses, valuation of stock-based awards and income taxes. Actual results could differ from those estimates.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Segment Information&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Operating segments are defined as components of an enterprise about which separate discrete information is available for evaluation by the chief operating decision-maker, or decision making group, in deciding how to allocate resources and assess performance. The Company views its operations and manages its business as a single operating segment, which is the business of discovering and developing ADCs.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Summary of Accounting Policies&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The significant accounting policies used in preparation of these condensed consolidated financial statements for the three and nine months ended September&#160;30, 2022 are consistent with those discussed in Note 2, &lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%"&gt;Summary of Significant Accounting Policies&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;, in the Company&#x2019;s Annual Report on Form 10-K for the year ended December 31, 2021.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Fair Value Measurements&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Fair value is defined as the price that would be received upon sale of an asset or paid to transfer a liability between market participants at measurement dates. ASC&#160;820,&#160;&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%"&gt;Fair Value Measurement,&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt; establishes a three-level valuation hierarchy for instruments measured at fair value. The hierarchy is based on the transparency of inputs to the valuation of an asset or liability as of the measurement date. The three levels are defined as follows:&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Level&#160;1&#x2014;Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Level&#160;2&#x2014;Inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Level&#160;3&#x2014;Inputs to the valuation methodology are unobservable and significant to the fair value measurement.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Concentration of Credit Risk and Off-balance Sheet Risk&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Financial instruments that potentially subject the Company to concentrations of credit risk primarily consist of cash equivalents and marketable securities. Under its investment policy, the Company limits amounts invested in such securities by credit rating, maturity, industry group, investment type and issuer, except for securities issued by the U.S. government. The Company does not believe that it is subject to any significant concentrations of credit risk from these financial instruments. The Company has no financial instruments with off-balance sheet risk, such as foreign exchange contracts, option contracts, or other foreign hedging arrangements. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Marketable Securities&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company&#x2019;s investment strategy is focused on capital preservation. The Company invests in instruments that meet the credit quality standards outlined in the Company&#x2019;s investment policy. Short-term marketable securities consist of investments in debt securities with maturities greater than three months and less than one year from the balance sheet date. The Company classifies all of its marketable securities as available-for-sale. Accordingly, these investments are recorded at fair value. Fair value is determined based on quoted market prices. Amortization and accretion of discounts and premiums are recorded as interest income within other income (expense), net. Realized gains and losses are included in other income (expense), net. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company assesses its available-for-sale debt securities under the available-for-sale debt security impairment model in ASC 326, &lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%"&gt;Financial Instruments - Credit Losses&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;, as of each reporting date in order to determine if a portion of any decline in fair value below carrying value recognized on its available-for-sale debt securities is the result of a credit loss. The Company records credit losses in the consolidated statements of operations and comprehensive loss as a component of other income (expense), net, which is limited to the difference between the fair value and the amortized cost of the security. To date, the Company has not recorded any credit losses on its available-for-sale debt securities.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Cash and Cash Equivalents&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company considers all highly-liquid investments with an original maturity, or a remaining maturity at the time of purchase, of three months or less to be cash equivalents. The Company invests excess cash primarily in money market funds, commercial paper and government agency securities, which are highly liquid and have strong credit ratings. The Company determined that these investments are subject to minimal credit and market risks. Cash and cash equivalents are stated at cost, which approximates market value.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Recently Issued Accounting Pronouncements&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;From time to time, new accounting pronouncements are issued by the FASB or other standard setting bodies that the Company adopts as of the specified effective date. Unless otherwise discussed below, the Company does not believe that the adoption of recently issued standards have or may have a material impact on the Company's condensed consolidated financial statements or disclosures.&lt;/span&gt;&lt;/div&gt;</us-gaap:SignificantAccountingPoliciesTextBlock>
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      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY18zNy9mcmFnOmYzNjkzMGM3YmE4YTRmYjc5YzkwMTU3NTQ3YjQ5MDUxL3RleHRyZWdpb246ZjM2OTMwYzdiYThhNGZiNzljOTAxNTc1NDdiNDkwNTFfNjA4Ng_388d7347-ea23-4bf0-8fc8-85c614a9b702">&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Recently Issued Accounting Pronouncements&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;From time to time, new accounting pronouncements are issued by the FASB or other standard setting bodies that the Company adopts as of the specified effective date. Unless otherwise discussed below, the Company does not believe that the adoption of recently issued standards have or may have a material impact on the Company's condensed consolidated financial statements or disclosures.&lt;/span&gt;&lt;/div&gt;</us-gaap:NewAccountingPronouncementsPolicyPolicyTextBlock>
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      contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180MC9mcmFnOjU1ZTY1MjkyOGVkZDQ3Y2NiZWQxM2NlMWI3Mjc2Y2M3L3RleHRyZWdpb246NTVlNjUyOTI4ZWRkNDdjY2JlZDEzY2UxYjcyNzZjYzdfMTQ4Nzc_0b37bf9e-b00c-49d5-8fdf-a02b7013dde7">Collaboration agreements&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;GlaxoSmithKline Intellectual Property (No. 4) Limited&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;On August 6, 2022, the Company entered into a Collaboration, Option and License Agreement (the "GSK Agreement") with GlaxoSmithKline Intellectual Property (No. 4) Limited ("GSK"), pursuant to which the Company granted GSK an exclusive option to obtain an exclusive license (the &#x201c;Option&#x201d;) to co-develop and to commercialize products containing XMT-2056 (the "Licensed Products"), exercisable within a specified time period (the &#x201c;Option Period&#x201d;) after the Company delivers to GSK data resulting from completion of dose escalation with enrichment for breast cancer patients in a Phase 1 single-agent clinical trial of XMT-2056. GSK&#x2019;s exercise of the Option may require clearance under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (&#x201c;HSR Clearance&#x201d; and GSK&#x2019;s exercise of the Option following any applicable HSR Clearance, the &#x201c;GSK Option Exercise&#x201d;). Prior to the GSK Option Exercise, the Company will lead and will be responsible for the costs of manufacturing, research, and early clinical development related to its XMT-2056 program. After the GSK Option Exercise, if any, GSK may elect to manufacture XMT-2056, and GSK and the Company will co-develop XMT-2056 aimed at the approval of Licensed Product(s) in the United States and the European Union, with GSK being responsible for the majority of the development costs. GSK will be responsible for all development costs aimed solely at gaining approval outside the United States and European Union. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Pursuant to the GSK Agreement, following the GSK Option Exercise and subject to certain exceptions and specified payment obligations, the Company&#x2019;s aggregate shared development costs are capped at a fixed amount, with any amounts in excess to be borne by GSK unless and until the Company exercises its option to receive (or bear) a specified share of U.S. profits (or losses) for any Licensed Products (&#x201c;Profit Share Election&#x201d;). The excess development costs will accrue interest as specified in the GSK Agreement and will later either be repaid by the Company or offset against future regulatory and sales milestones or royalty payments that may become due to the Company. If the Company exercises its Profit Share Election, the cap on the Company&#x2019;s share of development costs shall no longer apply, and the Company must pay any then-outstanding excess plus accrued interest costs. Additionally, if the Company exercises its Profit Share Election, it may also simultaneously elect to co-promote any Licensed Products in the United States.    &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Pursuant to the GSK Agreement, GSK paid the Company a non-refundable, upfront fee of $100.0&#160;million in August 2022. Following the GSK Option Exercise, if any, GSK is obligated to pay the Company an option exercise payment of $90.0&#160;million (the "Option Payment"). The Company is eligible to receive future development, regulatory, and commercial milestone payments up to approximately $1.3&#160;billion and, if the Company does not exercise its Profit Share Election, tiered royalties up to the mid-twenty percent range based on global sales of Licensed Products. Included in the aggregate milestone payments amount is $30&#160;million that the Company is eligible to earn upon the satisfaction of early clinical development milestones that may occur prior to the GSK Option Exercise. If the Company exercises its Profit Share Election, the Company will be eligible to receive reduced development, regulatory, and commercial milestone payments and reduced royalty rates on sales outside of the United States. Whether or not the Company exercises its Profit Share Election, GSK will be responsible for certain milestone payments or royalties due to specified third parties with which the Company currently has agreements that relate to the XMT-2056 program.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The GSK Agreement will terminate at the end of the Option Period if GSK does not exercise its Option. In the event of the GSK Option Exercise, unless earlier terminated, the GSK Agreement will continue in effect until the date on &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;which the royalty term and all payment obligations with respect to all Licensed Products in all countries have expired.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Accounting Analysis&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company assessed the GSK Agreement in accordance with ASC 606, &lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%"&gt;Revenue from Contracts with Customers&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;, and concluded that the contract counterparty, GSK, is a customer. The Company identified the following two material performance obligations under the GSK Agreement: (i) development activities, including manufacturing, research and early clinical development activities, necessary to deliver the package of data, information and materials specified in the GSK agreement (the "Development Activities") and (ii) the Option to co-develop and to commercialize Licensed Products (the "License Option"). &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company concluded that the Development Activities are one distinct performance obligation, as the underlying activities are not distinguishable in the context of the contract and are inputs to an integrated development program that will generate data and information providing value to GSK in determining whether to exercise the Option. The License Option is considered a material right as the value of the license exceeds the Option Payment, and is therefore a distinct performance obligation.  &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;In accordance with ASC 606, the Company determined that the initial transaction price under the GSK Agreement equals $100.0&#160;million, consisting of the upfront, non-refundable and non-creditable payment paid by GSK. None of the early clinical development milestones that may occur prior to the GSK Option Exercise have been included in the initial transaction price, as all milestone amounts were fully constrained. As part of its evaluation of the constraint, the Company considered numerous factors, including stage of development and the remaining risks associated with the development required to achieve the milestones, as well as whether the achievement of the milestones is outside the control of the Company or GSK. At the end of each subsequent reporting period, the Company will re-evaluate the probability of achievement and any related constraint and, if necessary, adjust its estimate of the overall transaction price. Any such adjustments will be recorded on a cumulative catch-up basis, which would affect the reported amount of revenues in the period of adjustment. The GSK Option payment is excluded from the initial transaction price at contract inception along with any future development, regulatory, and commercial milestone payments (including royalties) following the GSK Option Exercise. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Consistent with the allocation objective under ASC 606, the Company allocated the $100.0&#160;million fixed upfront payment in the transaction price to the Development Activities and the License Option based on each performance obligation&#x2019;s relative standalone selling price. The standalone selling price for the Development Activities was calculated using a cost-plus margin approach for the estimated pre-option development timeline. For the standalone selling price of the License Option, the Company utilized an income-based approach which included the following key assumptions: post-option development timeline and costs, revenue forecast, discount rates and probabilities of technical and regulatory success. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company is recognizing revenue related to the Development Activities performance obligation over the estimated period of the pre-option development using a&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt; proportional performance model as the underlying activities are performed. Th&lt;/span&gt;&lt;span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;e C&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;ompany measures proportional performance based on the costs incurred relative to the total costs expected to be incurred. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company will defer revenue recognition related to the License Option. If the License Option is exercised and GSK obtains an exclusive license, the Company will recognize revenue as it fulfills its obligations under the GSK Agreement. If the Option is not exercised, the Company will recognize the entirety of the revenue in the period when the Option expires.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;During the three and nine months ended September&#160;30, 2022, the Company recorded collaboration revenue of $0.7&#160;million related to its efforts under the GSK Agreement. As of September&#160;30, 2022, the Company had recorded $99.3&#160;million in deferred revenue related to the unsatisfied performance obligations under the GSK Agreement. This deferred revenue will be recognized over the remaining performance period and classified as current or noncurrent on the consolidated balance sheets.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Summary of Contract Assets and Liabilities&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company did not record any contract assets as of September&#160;30, 2022 related to the GSK Agreement. The following table presents changes in the balances of the Company's contract liabilities related to the GSK Agreement during the nine months ended September&#160;30, 2022:&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:45.127%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.744%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Balance at&lt;br/&gt;Beginning&lt;br/&gt;of Period&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Additions&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Deductions&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Balance at&lt;br/&gt;End of Period&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Nine months ended September 30, 2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Contract liabilities:&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Deferred revenue&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;100,000&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;655&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;99,345&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;During the three and nine months ended September&#160;30, 2022, the Company recognized the following revenues related to the GSK Agreement as a result of changes in the contract liability balances in the respective periods:&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:63.803%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:16.047%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.601%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:16.049%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Three Months Ended&lt;br/&gt;September 30,&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Nine Months Ended&lt;br/&gt;September 30,&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Revenue recognized in the period from:&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Amounts included in the contract liability at the beginning of the period&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Performance obligations satisfied in previous periods&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Janssen Biotech Inc.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;In February 2022, the Company entered into a research collaboration and license agreement with Janssen Biotech Inc. ("Janssen" and such agreement, the "Janssen Agreement") focused on the research, development and commercialization of novel ADCs for three oncology targets by leveraging Mersana&#x2019;s ADC expertise and Dolasynthen platform with Janssen&#x2019;s proprietary antibodies. Upon execution of the Janssen Agreement, the Company received a non-refundable upfront payment of $40.0&#160;million from Janssen. Pursuant to the Janssen Agreement, the Company granted Janssen two exclusive, non-transferrable, worldwide licenses - the Research License and the Commercialization License (together, the "Licenses"). The Research License provides Janssen, on a target-by-target basis, rights under the Company&#x2019;s technology and the Company&#x2019;s interest in the technology developed jointly through the collaboration solely to conduct Janssen&#x2019;s activities under the research and Chemistry, Manufacturing and Controls ("CMC") plans with respect to each target. The Commercialization License is a royalty-bearing license granted on a target-by-target basis under the Company&#x2019;s technology and the Company&#x2019;s interest in the technology developed jointly through the collaboration to develop, manufacture, commercialize and otherwise exploit licensed ADCs and any licensed products containing licensed ADCs directed toward a target. Janssen may select up to three targets and may substitute each target once prior to a substitution deadline. Janssen is not required to pay a fee for its first substitution right, but must pay a one-time fee for access to the subsequent substitution rights following its exercise of its second substitution right.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Pursuant to mutually agreed research and CMC plans, the Company will perform bioconjugation, production development, preclinical manufacturing, and certain related research and preclinical development activities, in order to progress the targets through investigational new drug application ("IND") submission for further development, manufacture and commercialization by Janssen. Janssen will have sole responsibility for IND-enabling studies, IND submission, clinical development, regulatory activities and commercialization of the licensed ADCs. Both the Company and Janssen will have equal representation on a Joint Research Committee and Joint Manufacturing Committee to oversee the research and CMC activities. The Company estimates that its activities under the research plans for the targets will be performed through 2024. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company's CMC activities will be compensated by Janssen at agreed upon rates. Assuming successful development and commercialization of all three targets by Janssen, the Company could receive up to an additional $505&#160;million in development and regulatory milestones and $530&#160;million in sales milestones as well as tiered mid single-digit to low double-digit royalties on aggregate net sales of the ADC products. To date, the Company has not achieved any of the specified milestones. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Unless earlier terminated, the Janssen Agreement will expire upon the expiration of the last royalty term for a product under the Janssen Agreement. The Janssen Agreement contains customary provisions for termination by either party, including in the event of breach of the Janssen Agreement, subject to cure, by Janssen for convenience and by Mersana upon a challenge of the licensed patents, and customary provisions regarding the effects of termination. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Janssen may request that the Company perform clinical manufacturing services under a separate clinical supply agreement. Janssen may also request that the Company perform a technology transfer of bioconjugation and manufacturing process technology, at Janssen's cost, at an agreed upon rate.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Accounting Analysis&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company assessed the Janssen Agreement in accordance with ASC 606 and concluded that the contract counter party, Janssen, is a customer. The Company identified the following seven material performance obligations under the Janssen Agreement: (i) exclusive Licenses and research activities for each of the three designated targets, (ii) CMC activities for each of the three designated targets and (iii) the first target substitution right.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company concluded that the Licenses and research activities are one combined performance obligation for each target as the Licenses are not capable of being distinct from the research activities given their proprietary nature. The CMC activities are considered a distinct performance obligation for each target as the activities could be performed by a third-party provider. The first target substitution right is considered a material right as there is no option exercise fee and, as such, is a distinct performance obligation.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;In accordance with ASC 606, the Company determined that the initial transaction price under the Janssen Agreement equals $40.0&#160;million, consisting of the upfront, non-refundable and non-creditable payment. None of the development and the regulatory milestones have been included in the transaction price, as all milestone amounts were fully constrained. As part of its evaluation of the constraint, the Company considered numerous factors, including stage of development and the remaining risks associated with the development required to achieve the milestones, as well as whether the achievement of the milestones is outside the control of the Company or Janssen. Any consideration related to sales-based milestones (including royalties) will be recognized when the related sales occur as such milestones were determined to relate predominantly to the license granted to Janssen and therefore have also been excluded from the transaction price. At the end of each subsequent reporting period, the Company will re-evaluate the probability of achievement of each milestone and any related constraint and, if necessary, adjust its estimate of the overall transaction price. Any such adjustments are recorded on a cumulative catch-up basis, which would affect the reported amount of revenues in the period of adjustment.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company determined that the consideration for CMC activities represents variable consideration. The Company has not included potential cost reimbursements within the transaction price as no CMC activities for any of the three targets have been initiated. The Company elected to apply the Right to Invoice practical expedient under ASC 606. As such, the Company will recognize revenue related to the CMC activities when the services are performed.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Consistent with the allocation objective under ASC 606, the Company allocated the $40.0&#160;million fixed upfront payment in the transaction price to the Licenses and research activities and first substitution right based on each performance obligation&#x2019;s relative standalone selling price. Each of the standalone selling prices for the Licenses and research activities and for the first substitution right were estimated utilizing an income approach, along with the likelihood of exercise for the substitution right and included the following key assumptions: the development timeline, revenue forecast, discount rate and probabilities of technical and regulatory success. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company is recognizing revenue related to the Licenses and research services performance obligation over the estimated period of the research services using a proportional performance model. The Company measures proportional performance based on the costs incurred relative to the total costs expected to be incurred. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company will recognize revenue related to the first target substitution right over time in congruence with the Licenses and research activities, upon the exercise of the option. If the first target substitution option is not exercised, the Company will recognize the entirety of the revenue in the period when the option expires.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;During the three and nine months ended September&#160;30, 2022, the Company recorded collaboration revenue of $4.9&#160;million and $10.9&#160;million, respectively, related to its efforts under the Janssen Agreement. As of September&#160;30, 2022, the Company had recorded $29.1&#160;million in deferred revenue related to the Janssen Agreement that will be recognized over the remaining performance period and classified as current or noncurrent on the consolidated balance sheets based upon the expected timing of satisfaction of respective performance obligations. The aggregate amount of the transaction price allocated to unsatisfied performance obligations was $29.1&#160;million as of September&#160;30, 2022, which is expected to be recognized over the period the associated research activities are performed for each target.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Summary of Contract Assets and Liabilities&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company did not record any contract assets as of September&#160;30, 2022 related to the Janssen Agreement. The following table presents changes in the balances of the Company's contract liabilities related to the Janssen Agreement during the nine months ended September&#160;30, 2022:&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:45.127%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.744%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Balance at&lt;br/&gt;Beginning&lt;br/&gt;of Period&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Additions&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Deductions&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Balance at&lt;br/&gt;End of Period&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Nine months ended September 30, 2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Contract liabilities:&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Deferred revenue&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;40,000&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;10,916&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;29,084&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;During the three and nine months ended September&#160;30, 2022, the Company recognized the following revenues related to the Janssen Agreement as a result of changes in the contract liability balances in the respective periods:&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:63.803%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:16.047%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.601%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:16.049%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Three Months Ended&lt;br/&gt;September 30,&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Nine Months Ended&lt;br/&gt;September 30,&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Revenue recognized in the period from:&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Amounts included in the contract liability at the beginning of the period&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;4,908&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Performance obligations satisfied in previous periods&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Merck KGaA&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;In June 2014, the Company entered into a collaboration and commercial license agreement with Merck KGaA (the "Merck KGaA Agreement"). Upon the execution of the Merck KGaA Agreement, Merck KGaA paid the Company a non-refundable technology access fee of $12.0 million for the right to develop ADCs directed to six exclusive targets over a specified period of time. No additional fees are due when a target is designated and the commercial license to the target is granted. Merck KGaA will be responsible for the product development and marketing of any products resulting from this collaboration.&#160;&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Under the terms of the Merck KGaA Agreement, the Company and Merck KGaA develop research plans to evaluate Merck KGaA's antibodies as ADCs incorporating the Company's technology. The Company receives reimbursement for its efforts under the research plans. The goal of the research plans is to provide Merck KGaA with sufficient information to formally nominate a development candidate and begin IND-enabling studies.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;All six targets were designated prior to 2018. The next potential milestone payment that the Company is eligible to receive is a development milestone of $0.5 million on Merck KGaA&#x2019;s designation of a preclinical development candidate for a target. Revenue will be recognized when achievement of the milestone is considered probable.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;In May 2018, the Company entered into a supply agreement with Merck KGaA (the "Merck KGaA Supply Agreement"). Under the terms of the Merck KGaA Supply Agreement, the Company will provide Merck KGaA preclinical non-good manufacturing practice ("non-GMP") ADC drug substance and clinical good manufacturing practice ("GMP") drug substance for use in clinical trials associated with one of the antibodies designated under the Merck KGaA Agreement. The Company receives fees for its efforts under the Merck KGaA Supply Agreement and reimbursement equal to the supply cost. The Company may also enter into future supply agreements to provide clinical supply material should Merck KGaA pursue clinical development of any other candidates nominated under the Merck KGaA Agreement.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Accounting Analysis&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company concluded that Merck KGaA is a customer and accounted for the Merck KGaA Agreement in accordance with ASC 606. The Company identified the following performance obligations under the Merck KGaA Agreement: (i) exclusive license and research services for six designated targets, (ii) rights to future technological improvements and (iii) participation of project team leaders and providing joint research committee services.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company is recognizing revenue related to the exclusive license and research and development services performance obligations over the estimated period of the research and development services using a proportional performance model. The Company measures proportional performance based on the costs incurred relative to the total costs expected to be incurred. To the extent that the Company receives fees for the research services as they are performed, these amounts are recorded as deferred revenue. Revenue related to future technological improvements and joint research committee services will be recognized ratably over the respective performance period (which in the case of the joint research committee services approximate the time and cost incurred each period), which are 10 and 5 years, respectively.&#160;The Company is continuing to reassess the estimated remaining term at each subsequent reporting period.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;As of September&#160;30, 2022, the Company had completed its research service obligations associated with four of the six designated targets. The Company did not recognize any corresponding research and development expense related to the Merck KGaA Supply Agreement during the three and nine months ended September&#160;30, 2022 and 2021. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;As of September&#160;30, 2022 and December&#160;31, 2021, the Company had $3.9 million in deferred revenue related to the Merck KGaA Agreement and Merck KGaA Supply Agreement. Such amounts will be recognized over the remaining performance period. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Summary of Contract Assets and Liabilities&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company did not record any contract assets as of September&#160;30, 2022 and December&#160;31, 2021. The following table presents changes in the balances of the Company's contract liabilities related to the Merck KGaA Agreement and Merck KGaA Supply Agreement during the nine months ended September&#160;30, 2022 and 2021:&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:45.127%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.744%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Balance at&lt;br/&gt;Beginning&lt;br/&gt;of Period&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Additions&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Deductions&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Balance at&lt;br/&gt;End of Period&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Nine months ended September 30, 2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Contract liabilities:&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Deferred revenue&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;3,944&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;32&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;3,912&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:45.127%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.744%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Balance at&lt;br/&gt;Beginning&lt;br/&gt;of Period&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Additions&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Deductions&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Balance at&lt;br/&gt;End of Period&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Nine months ended September 30, 2021&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Contract liabilities:&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Deferred revenue&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;3,987&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;32&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;3,955&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;During the three and nine months ended September&#160;30, 2022 and 2021, the Company recognized the following revenues related to the Merck KGaA Agreement and Merck KGaA Supply Agreement as a result of changes in the contract liability balances in the respective periods:&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:45.214%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.720%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.601%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.720%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.601%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.720%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.601%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.723%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Three Months Ended&lt;br/&gt;September 30,&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Nine Months Ended&lt;br/&gt;September 30,&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2021&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2021&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Revenue recognized in the period from:&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Amounts included in the contract liability at the beginning of the period&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;11&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 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Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Other Revenue&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company has provided limited services for a collaboration partner, Asana BioSciences, LLC ("Asana Biosciences"). During the nine months ended September&#160;30, 2022, the Company recognized revenue of $0.3 million related to these services and did not recognize revenue related to these services during the three months ended September 30, 2022 or during the three and nine months ended September&#160;30, 2021. The next potential milestone the Company is eligible to receive is $2.5 million upon dosing the fifth patient in a Phase 1 clinical trial by Asana BioSciences. While the first patient was dosed in April 2022, as of September&#160;30, 2022, the Company considers this next milestone to be fully constrained as there is considerable judgment involved in determining whether it is probable that a significant revenue reversal would occur. As part of its evaluation of the constraint, the Company considered numerous factors, including the fact that achievement of the milestone is outside the control of the Company and there is a high level of uncertainty in achieving this milestone, as the collaboration partner continues to evaluate its candidate in the Phase 1 trial. The Company reevaluates the probability of achievement of a milestone subject to constraint at each reporting period and as uncertain events are resolved or other changes in circumstances occur.&lt;/span&gt;&lt;/div&gt;</us-gaap:CollaborativeArrangementDisclosureTextBlock>
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style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Nine months ended September 30, 2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Contract liabilities:&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Deferred revenue&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;100,000&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;655&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;99,345&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;During the three and nine months ended September&#160;30, 2022, the Company recognized the following revenues related to the GSK Agreement as a result of changes in the contract liability balances in the respective periods:&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:63.803%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:16.047%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.601%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:16.049%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Three Months Ended&lt;br/&gt;September 30,&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Nine Months Ended&lt;br/&gt;September 30,&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Revenue recognized in the period from:&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Amounts included in the contract liability at the beginning of the period&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Performance obligations satisfied in previous periods&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;The following table presents changes in the balances of the Company's contract liabilities related to the Janssen Agreement during the nine months ended September&#160;30, 2022:&lt;div style="margin-bottom:12pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:45.127%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.744%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Balance at&lt;br/&gt;Beginning&lt;br/&gt;of Period&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Additions&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Deductions&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Balance at&lt;br/&gt;End of Period&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Nine months ended September 30, 2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Contract liabilities:&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Deferred revenue&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;40,000&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;10,916&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;29,084&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;During the three and nine months ended September&#160;30, 2022, the Company recognized the following revenues related to the Janssen Agreement as a result of changes in the contract liability balances in the respective periods:&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:63.803%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:16.047%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.601%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:16.049%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Three Months Ended&lt;br/&gt;September 30,&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Nine Months Ended&lt;br/&gt;September 30,&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Revenue recognized in the period from:&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Amounts included in the contract liability at the beginning of the period&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;4,908&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Performance obligations satisfied in previous periods&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;The following table presents changes in the balances of the Company's contract liabilities related to the Merck KGaA Agreement and Merck KGaA Supply Agreement during the nine months ended September&#160;30, 2022 and 2021:&lt;div style="margin-bottom:12pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:45.127%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.744%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Balance at&lt;br/&gt;Beginning&lt;br/&gt;of Period&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Additions&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Deductions&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Balance at&lt;br/&gt;End of Period&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Nine months ended September 30, 2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Contract liabilities:&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Deferred revenue&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;3,944&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;32&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;3,912&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:45.127%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.744%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Balance at&lt;br/&gt;Beginning&lt;br/&gt;of Period&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Additions&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Deductions&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Balance at&lt;br/&gt;End of Period&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Nine months ended September 30, 2021&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Contract liabilities:&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Deferred revenue&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;3,987&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;32&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;3,955&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;During the three and nine months ended September&#160;30, 2022 and 2021, the Company recognized the following revenues related to the Merck KGaA Agreement and Merck KGaA Supply 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0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;11&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span 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1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;September 30, 2022&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Total&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Quoted&#160;Prices&lt;br/&gt;in&#160;Active&lt;br/&gt;Markets&lt;br/&gt;(Level&#160;1)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Significant&lt;br/&gt;Other&lt;br/&gt;Observable&lt;br/&gt;Inputs&lt;br/&gt;(Level&#160;2)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Significant&lt;br/&gt;Unobservable&lt;br/&gt;Inputs&lt;br/&gt;(Level&#160;3)&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Cash equivalents&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New 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Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;4,926&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The money market funds noted above are included in cash and cash equivalents in the accompanying condensed consolidated balance sheets. There were no changes in valuation techniques or transfers between fair value measurement levels during the nine months ended September&#160;30, 2022.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Marketable securities classified as Level 1 within the valuation hierarchy generally consists of U.S. treasury securities, as the fair value is readily determinable based on active daily markets for identical securities. Marketable securities classified as Level 2 within the valuation hierarchy generally consists of U.S. government agency securities, as the fair value is readily determinable based on active daily markets for similar securities and other observable inputs. The Company estimates the fair values of marketable securities by taking into consideration valuations obtained from third-party pricing sources. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The carrying amounts reflected in the consolidated balance sheets for&lt;/span&gt;&lt;span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt; prepaid expenses and other current assets, accounts payable and accrued expenses approximate their fair values due to their short-term nature.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;As of September&#160;30, 2022 and December&#160;31, 2021, the carrying value of the Company&#x2019;s outstanding borrowing under the New Credit Facility (as defined in Note 7) approximated fair value (a Level 2 fair value measurement), reflecting interest rates currently available to the Company. The New Credit Facility is discussed in more detail in Note 7, &lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%"&gt;Debt&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;.&lt;/span&gt;&lt;/div&gt;</us-gaap:FairValueMeasurementInputsDisclosureTextBlock>
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The Company had no marketable securities as of December&#160;31, 2021.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:98.076%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:46.612%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.971%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.971%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.971%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.975%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="12" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;September 30, 2022&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Total&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Quoted&#160;Prices&lt;br/&gt;in&#160;Active&lt;br/&gt;Markets&lt;br/&gt;(Level&#160;1)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Significant&lt;br/&gt;Other&lt;br/&gt;Observable&lt;br/&gt;Inputs&lt;br/&gt;(Level&#160;2)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Significant&lt;br/&gt;Unobservable&lt;br/&gt;Inputs&lt;br/&gt;(Level&#160;3)&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Cash equivalents&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Money market funds&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;29,509&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;29,509&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Marketable securities&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;U.S. treasury securities&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;101,118&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;101,118&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;U.S. government agency securities&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;4,926&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New 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style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:45.127%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.744%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Nine Months Ended&lt;br/&gt;September 30, 2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Nine Months Ended&lt;br/&gt;September 30, 2021&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Beginning&lt;br/&gt;of period&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;End&lt;br/&gt;of period&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Beginning&lt;br/&gt;of period&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;End&lt;br/&gt;of period&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Cash and cash equivalents&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;177,947&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;184,082&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;255,094&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;191,707&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Restricted cash included in other assets, noncurrent&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;478&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;478&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New 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flows&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;178,425&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;184,560&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;255,415&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;192,185&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Marketable securities&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The following table summarizes the Company's marketable securities held at September&#160;30, 2022. &lt;/span&gt;&lt;span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company had no marketable securities as of&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt; December&#160;31, 2021.&lt;/span&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:45.127%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.744%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="21" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;September 30, 2022&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Amortized&lt;br/&gt;Cost&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Gross&lt;br/&gt;Unrealized&lt;br/&gt;Gains&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Gross&lt;br/&gt;Unrealized&lt;br/&gt;Losses&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Fair&lt;br/&gt;Value&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Marketable securities&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;U.S. treasury securities&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;101,342&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;4&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;(228)&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;101,118&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;U.S. government agency securities&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;4,933&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;(7)&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;4,926&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;All of the Company's marketable securities are due within one year or less. The Company did not realize any gains or losses recognized on the sale or maturity of marketable securities during the nine months ended September&#160;30, 2022, and, as a result, the Company did not reclassify any amounts out of accumulated comprehensive loss.&lt;/span&gt;&lt;/div&gt;As of September&#160;30, 2022, the Company's debt security portfolio consisted of 23 securities that were in an unrealized loss position and had an aggregate fair value of $96.1&#160;million. There were no securities in an unrealized loss position for greater than 12 months as of September&#160;30, 2022.  The unrealized losses on the Company's marketable securities were caused by market interest rate increases. The Company has the intent and ability to hold such securities until recovery. As a result, the Company did not record any charges for credit-related impairments for its marketable debt securities for the nine months ended as of September&#160;30, 2022.</us-gaap:CashCashEquivalentsAndMarketableSecuritiesTextBlock>
    <us-gaap:ScheduleOfRestrictedCashAndCashEquivalentsTextBlock
      contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RleHRyZWdpb246MmM3MjFhYzcxY2E0NDE4MThmMmNlYzVhNDFlZDExOWVfMTMxOQ_0b965c52-1c75-4ba5-8b84-1e2a4740b302">&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The following table summarizes the Company's cash, cash equivalents, and restricted cash as of September&#160;30, 2022 and 2021.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:45.127%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.744%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Nine Months Ended&lt;br/&gt;September 30, 2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Nine Months Ended&lt;br/&gt;September 30, 2021&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Beginning&lt;br/&gt;of period&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;End&lt;br/&gt;of period&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Beginning&lt;br/&gt;of period&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;End&lt;br/&gt;of period&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Cash and cash equivalents&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;177,947&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;184,082&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;255,094&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;191,707&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Restricted cash included in other assets, noncurrent&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;478&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;478&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;321&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;478&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Total cash, cash equivalents and restricted cash per statement of cash flows&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;178,425&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;184,560&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;255,415&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New 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      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY180Ni9mcmFnOjJjNzIxYWM3MWNhNDQxODE4ZjJjZWM1YTQxZWQxMTllL3RleHRyZWdpb246MmM3MjFhYzcxY2E0NDE4MThmMmNlYzVhNDFlZDExOWVfMTMyMA_1dff6388-834b-41a6-b347-9d3bca761de5">&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The following table summarizes the Company's marketable securities held at September&#160;30, 2022. &lt;/span&gt;&lt;span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company had no marketable securities as of&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt; December&#160;31, 2021.&lt;/span&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.839%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:45.127%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.741%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.602%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.744%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="21" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;September 30, 2022&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Amortized&lt;br/&gt;Cost&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Gross&lt;br/&gt;Unrealized&lt;br/&gt;Gains&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Gross&lt;br/&gt;Unrealized&lt;br/&gt;Losses&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Fair&lt;br/&gt;Value&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Marketable securities&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 7.75pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;U.S. treasury securities&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New 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style="width:0.601%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:12.843%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;September 30,&lt;br/&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;December 31,&lt;br/&gt;2021&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Accrued manufacturing expenses&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;13,230&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;8,476&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Accrued clinical expenses&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;10,972&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;7,879&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Accrued research and non-clinical expenses&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;5,811&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;3,848&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Accrued payroll and related expenses&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;9,083&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;7,319&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Accrued professional fees&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;1,822&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;909&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Accrued other&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;286&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;285&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;41,204&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;28,716&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;</us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock>
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style="width:0.601%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:12.843%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;September 30,&lt;br/&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;December 31,&lt;br/&gt;2021&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Accrued manufacturing expenses&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;13,230&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;8,476&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Accrued clinical expenses&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;10,972&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;7,879&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Accrued research and non-clinical expenses&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;5,811&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;3,848&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Accrued payroll and related expenses&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;9,083&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;7,319&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Accrued professional fees&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;1,822&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;909&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Accrued other&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;286&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;285&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New 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Refer to Note 7, &lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%"&gt;Debt,&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt; in the Company&#x2019;s Annual Report on Form 10-K for the year ended December 31, 2021 for more information regarding the Prior Credit Facility. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;On October 29, 2021, the Company entered into a loan and security agreement (the "New Credit Facility") with SVB and Oxford Finance, LLC ("Oxford" and, together with SVB, the "Lenders"). Pursuant to the New Credit Facility, as amended, the Company can borrow term loans in an aggregate amount of $100.0 million, which includes (i) $60.0 million in up to three principal advances through December 31, 2022, (ii) an additional $20.0 million in one principal advance, if the Company reaches certain development milestone events through June 30, 2023, (iii) and an additional tranche of $20.0 million, subject to conditional approval from the Lenders. The New Credit Facility is secured by substantially all of the Company's personal property owned or later acquired, excluding intellectual property (but including the rights to payments and proceeds from intellectual property), and a negative pledge on intellectual property. The Company drew $25.0 million upon execution of the New Credit Facility, of which $5.5 million of the proceeds was used to repay the existing balance under the Prior Credit Facility and satisfy its obligations to SVB. Upon entering into the New Credit Facility, the Company terminated all commitments by SVB to extend further credit under the Prior Credit Facility and all guarantees and security interests granted by the Company to SVB under the Prior Credit Facility.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Refer to Note 7, &lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%"&gt;Debt&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;, in the Company&#x2019;s Annual Report on Form 10-K for the year ended December 31, 2021 for more information regarding the New Credit Facility. As of September&#160;30, 2022, the Company was in compliance with all covenants under the New Credit Facility. There are no events of default as of September&#160;30, 2022.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Unamortized debt financing costs are recorded as a reduction of the carrying amount on the term loan and amortized as interest expense using the effective-interest method. Unamortized deferred financing costs of $0.1 million were recorded in other assets as of September&#160;30, 2022 related to the Company's right to borrow additional amounts from the Lenders in the future and amortized to interest expense over the relevant draw period on a straight-line basis.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The following is a summary of obligations under the term loan as of September&#160;30, 2022:&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:84.957%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:12.843%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;September 30,&lt;br/&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Total debt&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New 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Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Total debt, net of current portion&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;25,000&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Debt financing costs, net of accretion&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;(345)&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Accretion related to final payment&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;198&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Long-term debt, net&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;24,853&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;Interest expense related to the New Credit Facility for the three and nine months ended September&#160;30, 2022 was $0.8&#160;million and $2.3&#160;million, respectively. 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1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;September 30,&lt;br/&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Total debt&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New 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colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Debt financing costs, net of accretion&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;(345)&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Accretion related to final payment&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" 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As of September&#160;30, 2022, approximately $42.4&#160;million remained unsold and available for sale under the 2022 ATM.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Warrants&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;In connection with a 2013 Series&#160;A-1 Preferred Stock issuance, the Company granted to certain investors warrants to purchase 129,491 shares of common stock. The warrants have a $0.05 per share exercise price and a contractual life of 10 years. The fair value of these warrants was recorded as a component of equity at the time of issuance. As of September&#160;30, 2022, there were warrants to purchase 22,590 shares of common stock outstanding. During the nine months ended September&#160;30, 2022, the Company issued 16,654 shares of common stock upon the exercise of warrants.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Common stock&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;At the 2022 Annual Meeting of Stockholders on June 9, 2022, the Company's stockholders approved an amendment to the Company&#x2019;s Fifth Amended and Restated Certificate of Incorporation to increase the number of authorized shares of common stock, $0.0001 par value per share, from 175,000,000 to 350,000,000. This increase became effective upon filing of a Certificate of Amendment with the Secretary of State of Delaware on June 9, 2022. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The holders of the common stock are entitled to one vote for each share held. Common stockholders are not entitled to receive dividends, unless declared by the Board of Directors (the "Board").&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;As of September&#160;30, 2022 and December&#160;31, 2021, there were 12,418,052 and 9,199,512, respectively, shares of common stock reserved for the exercise of outstanding stock options, restricted stock units ("RSUs") and warrants.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:70.214%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:12.842%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.601%"/&gt;&lt;td 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style="width:1.0%"/&gt;&lt;td style="width:12.842%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.601%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:12.843%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;September 30,&lt;br/&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;December 31,&lt;br/&gt;2021&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Stock options&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;10,524,780&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New 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colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;817,609&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Warrants&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;22,590&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;39,474&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;12,418,052&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;9,199,512&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;</us-gaap:ScheduleOfStockByClassTextBlock>
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      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfNjY2MQ_de341d36-8319-432a-8a51-071756ed7f9e">Stock-based compensation&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Stock incentive plans&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;As of June 30, 2017, there were 3,141,625 stock options outstanding under the Company&#x2019;s 2007 Stock Incentive Plan (the "2007 Plan"). The 2007 Plan expired in June 2017. Any cancellations or forfeitures of options granted under the 2007 Plan will increase the options available under the 2017 Stock Incentive Plan (the "2017 Plan"), as described below.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;In June 2017, the Company&#x2019;s stockholders approved the 2017 Plan. Under the 2017 Plan initially, up to 2,255,000 shares of common stock could be granted to the Company's employees, officers, directors, consultants and advisors in the form of options, RSUs or other stock-based awards. The number of shares of common stock issuable under the 2017 Plan will be cumulatively increased annually on January 1 by the lesser of (a) 4% of the outstanding shares on the immediately preceding December 31 or (b) such other amount specified by the Board. The terms of the awards are determined by the Board, subject to the provisions of the 2017 Plan. Any cancellations or forfeitures of options granted under the 2007 Plan, which expired in June 2017, would increase the number of shares that could be granted under the 2017 Plan. On January 1, 2022, the number of shares of common stock issuable under the 2017 Plan was increased by 2,948,362 shares. As of September&#160;30, 2022, there were 1,372,006 shares available for future issuance under the 2017 Plan. During the nine months ended September&#160;30, 2022, the Company granted 3,532,433 RSUs and options to purchase shares of common stock to employees and non-employee directors under the 2017 Plan.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Under the 2017 Plan, both with respect to incentive stock options and nonqualified stock options, the exercise price per share will not be less than the fair market value of the common stock on the date of grant and the vesting period is generally four years. Options granted under the 2017 Plan expire no later than 10 years from the date of grant. Options under the 2007 Plan were granted at an exercise price established by the Board (or a committee thereof) that was not less than the fair market value of the underlying common stock on the date of grant and subject to such vesting provisions determined by the Board (or a committee thereof). The Board may accelerate vesting or otherwise adjust the terms of granted options in the case of a merger, consolidation, dissolution, or liquidation of the Company.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Inducement awards&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;From time to time, the Company grants to its employees, upon approval by the Board or an authorized committee thereof, options to purchase shares of common stock as an inducement to employment in accordance with Nasdaq Listing Rule 5635(c)(4). Prior to February 2022, these options were granted outside of an existing equity incentive plan. These options are subject to terms substantially the same as the 2017 Plan. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;In February 2022, the Board adopted the Company's 2022 Inducement Stock Incentive Plan (the "Inducement Plan"), which provides for the grant of nonstatutory options, stock appreciation rights, restricted stock, RSUs and other stock-based awards, with respect to an aggregate of 2,000,000 shares of the Company's common stock (subject to adjustment as provided in the Inducement Plan). During the nine months ended September&#160;30, 2022, the Company granted 612,450 RSUs and options to purchase shares of common stock to newly hired employees under the Inducement Plan. As of September&#160;30, 2022, there were 1,403,975 shares available for future issuance under the Inducement Plan. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;As of September&#160;30, 2022, there were 757,500 options to purchase shares of common stock outstanding which were granted as inducement awards prior to the establishment of the Inducement Plan.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Stock option activity&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;A summary of stock option activity is as follows:&lt;/span&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:70.214%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:12.842%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.601%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:12.843%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Number&lt;br/&gt;of&#160;Shares&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Weighted-&lt;br/&gt;Average&lt;br/&gt;Exercise&#160;Price&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Outstanding at January&#160;1, 2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;8,342,429&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;11.25&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Granted&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;2,765,034&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;5.41&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Exercised&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;(54,299)&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;3.81&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Cancelled&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;(528,384)&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;13.33&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Outstanding at September&#160;30,&#160;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;10,524,780&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;9.65&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Vested and expected to vest at September 30, 2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;10,524,780&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-top:3pt double #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;9.65&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Exercisable at September&#160;30,&#160;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:3pt double #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;5,339,351&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:3pt double #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;8.96&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The weighted-average grant date fair value of options granted during the nine months ended September&#160;30, 2022 and 2021 was $3.96 and $12.37 per share, respectively. The total intrinsic value of options exercised during the nine months ended September&#160;30, 2022 and 2021 was $0.1&#160;million and $3.9&#160;million, respectively. The aggregate intrinsic value represents the difference between the exercise price and the selling price received by option holders upon the exercise of stock options during the period.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Cash received from the exercise of stock options was $0.2 million and $1.5 million for the nine months ended September&#160;30, 2022 and 2021, respectively.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Restricted stock units&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company periodically issues RSUs with a service condition to certain officers and other employees that typically vest between one year and four years from the grant date.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;A summary of the RSU activity is as follows:&lt;/span&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:84.957%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:12.843%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Number of Shares&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Unvested at January&#160;1, 2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;817,609&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Granted&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;1,379,849&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Vested&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;(190,841)&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Forfeited&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;(135,935)&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Unvested at September&#160;30,&#160;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;1,870,682&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Stock-based compensation expense&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Company uses the provisions of ASC 718, &lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%"&gt;Stock Compensation&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;, to account for all stock-based awards to employees and non-employees.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Stock-based compensation expense is recognized over the requisite service period, which is generally the vesting period, using the straight-line method.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The following table presents stock-based compensation expense by award type included within the Company&#x2019;s condensed consolidated statements of operations and comprehensive loss:&lt;/span&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:45.694%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.720%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.441%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.720%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.441%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.720%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.441%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.723%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Three Months Ended September 30,&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Nine Months Ended September 30,&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2021&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2021&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Stock options&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;3,901&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;3,986&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;11,952&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;10,617&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Restricted stock units&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;1,365&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;881&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;3,832&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;2,636&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Employee stock purchase plan&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;109&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;61&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;424&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;296&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Stock-based compensation expense included in total operating expenses&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;5,375&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;4,928&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;16,208&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;13,549&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The following table presents stock-based compensation expense as reflected in the Company&#x2019;s condensed consolidated statements of operations and comprehensive loss:&lt;/span&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:45.534%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.720%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.601%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.720%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.441%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.720%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.441%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.723%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Three Months Ended September 30,&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Nine Months Ended September 30,&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2021&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2021&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Research and development&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;2,890&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;2,607&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;8,569&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;7,410&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;General and administrative&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;2,485&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;2,321&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;7,639&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;6,139&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Stock-based compensation expense included in total operating expenses&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;5,375&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;4,928&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;16,208&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;13,549&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;As of September&#160;30, 2022, there was $34.5 million and $12.6 million of unrecognized stock-based compensation expense related to unvested stock options and unvested RSUs, respectively, that is expected to be recognized over a weighted-average period of 2.2 years and 2.8 years, respectively.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The fair value of each option award is estimated on the date of grant using the Black-Scholes option pricing model with the following weighted average assumptions:&lt;/span&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:47.457%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.560%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.601%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.560%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.441%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.560%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.441%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:10.280%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Three Months Ended&lt;br/&gt;September 30,&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Nine Months Ended September 30,&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2021&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2021&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Risk-free interest rate&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;2.9&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;%&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;1.0&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;%&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;2.0&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;%&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;0.8&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;%&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Expected dividend yield&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;%&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;%&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;%&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#x2014;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;%&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Expected term (years)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;6.11&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;6.11&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;5.99&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;6.05&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Expected stock price volatility&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;94&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;%&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span 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1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;83&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;%&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Expected volatility for the Company&#x2019;s common stock is determined based on the historical volatility of comparable publicly traded companies. The risk-free interest rate is based on the yield of U.S. Treasury securities consistent with the expected term of the option. No dividend yield was assumed as the Company has not historically and does not expect to pay dividends on its common stock. The expected term of the options granted is based on the use of the simplified method, in which the expected term is presumed to be the mid-point between the vesting date and the end of the contractual term.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The fair value of RSUs is determined based on the closing price of the Company&#x2019;s common stock on the date of grant.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%"&gt;Employee stock purchase plan&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;During the year ended December 31, 2017, the Board adopted, and the Company&#x2019;s stockholders approved the 2017 employee stock purchase plan (the "2017 ESPP"). 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      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfNjY3NA_dabffc0e-9ad0-405a-ab7a-3d70fa304b8f">&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;A summary of the RSU activity is as follows:&lt;/span&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:84.957%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:12.843%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Number of Shares&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Unvested at January&#160;1, 2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;817,609&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Granted&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;1,379,849&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Vested&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;(190,841)&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Forfeited&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;(135,935)&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Unvested at September&#160;30,&#160;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;1,870,682&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;</us-gaap:ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock>
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      unitRef="shares">190841</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod>
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      unitRef="shares">135935</us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod>
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      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RhYmxlOjA0MDE2ZmQ4YTVlYzRjMmI4NzFmOGI3YWE2MDlhM2E3L3RhYmxlcmFuZ2U6MDQwMTZmZDhhNWVjNGMyYjg3MWY4YjdhYTYwOWEzYTdfNS0xLTEtMS00NzkwMQ_99a27849-13c0-42a3-aa57-1f7b44461c7d"
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      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY181OC9mcmFnOjk5M2NkY2ZkOWQ4OTQzMWU5OWNjZDUzMGM3YmFhMjZjL3RleHRyZWdpb246OTkzY2RjZmQ5ZDg5NDMxZTk5Y2NkNTMwYzdiYWEyNmNfNjY3Mw_9e5bf688-5c5d-4c44-a4b8-64414b558052">&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The following table presents stock-based compensation expense by award type included within the Company&#x2019;s condensed consolidated statements of operations and comprehensive loss:&lt;/span&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:45.694%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.720%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.441%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.720%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.441%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.720%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.441%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.723%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Three Months Ended September 30,&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Nine Months Ended September 30,&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2021&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2021&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Stock options&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;3,901&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;3,986&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;11,952&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;10,617&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Restricted stock units&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;1,365&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;881&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;3,832&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;2,636&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Employee stock purchase plan&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;109&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;61&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;424&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;296&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Stock-based compensation expense included in total operating expenses&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;5,375&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;4,928&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;16,208&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;13,549&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;/table&gt;</us-gaap:ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock>
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style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.720%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.441%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.720%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.441%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.723%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Three Months Ended September 30,&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Nine Months Ended September 30,&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;(in thousands)&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2021&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;2021&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Research and development&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;2,890&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;2,607&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;8,569&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;7,410&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;General and administrative&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;2,485&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;2,321&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;7,639&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;6,139&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Stock-based compensation expense included in total operating expenses&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;5,375&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New 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style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.560%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.441%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:11.560%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.441%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:10.280%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Three Months Ended&lt;br/&gt;September 30,&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span 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    <us-gaap:EarningsPerSharePolicyTextBlock
      contextRef="ic7a53441b2f94ce29b7ca43be1db0607_D20220101-20220930"
      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY182MS9mcmFnOjlkZWM4ZTQ3MDMzNTQ0Mjk4MDQ2ZTcxYjVkZTI2YjNmL3RleHRyZWdpb246OWRlYzhlNDcwMzM1NDQyOTgwNDZlNzFiNWRlMjZiM2ZfMTE4OA_03b63667-5b4d-40a1-9ff3-ea6898968cf9">Net loss per shareBasic net loss per share of common stock is calculated by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period, without further consideration for potentially dilutive securities. Diluted net loss per share is computed by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock and potentially dilutive securities outstanding for the period determined using the treasury stock method.For purposes of the diluted net loss per share calculation, stock options, unvested RSUs and warrants to purchase common stock are considered to be potentially dilutive securities, but are excluded from the calculation of diluted net loss per share because their effect would be anti-dilutive and therefore, basic and diluted net loss per share were the same for all periods presented.</us-gaap:EarningsPerSharePolicyTextBlock>
    <us-gaap:EarningsPerShareTextBlock
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      id="id3VybDovL2RvY3MudjEvZG9jOjAzNmM0MmI3Y2Q3OTQyZGU4ODY3ZWI2MTk0N2IxYjFjL3NlYzowMzZjNDJiN2NkNzk0MmRlODg2N2ViNjE5NDdiMWIxY182MS9mcmFnOjlkZWM4ZTQ3MDMzNTQ0Mjk4MDQ2ZTcxYjVkZTI2YjNmL3RleHRyZWdpb246OWRlYzhlNDcwMzM1NDQyOTgwNDZlNzFiNWRlMjZiM2ZfMTE4OQ_96adab38-83c5-4ea4-946c-d57e0bcf43c2">Net loss per share&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Basic net loss per share of common stock is calculated by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period, without further consideration for potentially dilutive securities. Diluted net loss per share is computed by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock and potentially dilutive securities outstanding for the period determined using the treasury stock method.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;For purposes of the diluted net loss per share calculation, stock options, unvested RSUs and warrants to purchase common stock are considered to be potentially dilutive securities, but are excluded from the calculation of diluted net loss per share because their effect would be anti-dilutive and therefore, basic and diluted net loss per share were the same for all periods presented. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The following table sets forth the outstanding potentially dilutive securities that have been excluded from the calculation of diluted net loss per share because to include them would be anti-dilutive (in common stock equivalent shares):&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:12pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:49.220%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:23.419%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.441%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:23.420%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Three and Nine Months Ended&lt;br/&gt;September 30, 2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Three and Nine Months Ended&lt;br/&gt;September 30, 2021&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Stock options&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;10,524,780&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;8,215,549&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Unvested restricted stock units&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;1,870,682&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;800,466&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Warrants&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;22,590&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;39,474&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="2" style="border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;12,418,052&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="2" style="border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;9,055,489&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;</us-gaap:EarningsPerShareTextBlock>
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style="width:1.0%"/&gt;&lt;td style="width:23.419%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:0.441%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td style="width:1.0%"/&gt;&lt;td style="width:23.420%"/&gt;&lt;td style="width:0.1%"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Three and Nine Months Ended&lt;br/&gt;September 30, 2022&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%"&gt;Three and Nine Months Ended&lt;br/&gt;September 30, 2021&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Stock options&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;10,524,780&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;8,215,549&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Unvested restricted stock units&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;1,870,682&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="2" style="padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;800,466&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Warrants&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;22,590&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"/&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;39,474&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="2" style="border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:100%"&gt;12,418,052&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="display:none"/&gt;&lt;td colspan="3" style="padding:0 1pt"/&gt;&lt;td colspan="2" style="border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New 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end
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
