<SEC-DOCUMENT>0000895345-17-000338.txt : 20171115
<SEC-HEADER>0000895345-17-000338.hdr.sgml : 20171115
<ACCEPTANCE-DATETIME>20171115164732
ACCESSION NUMBER:		0000895345-17-000338
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20171115
DATE AS OF CHANGE:		20171115
GROUP MEMBERS:		MERCK SHARP & DOHME CORP.
GROUP MEMBERS:		MRL VENTURES FUND LLC

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Spero Therapeutics, Inc.
		CENTRAL INDEX KEY:			0001701108
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-90168
		FILM NUMBER:		171205694

	BUSINESS ADDRESS:	
		STREET 1:		675 MASSACHUSETTS AVENUE
		STREET 2:		14TH FLOOR
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
		BUSINESS PHONE:		857-242-1600

	MAIL ADDRESS:	
		STREET 1:		675 MASSACHUSETTS AVENUE
		STREET 2:		14TH FLOOR
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Spero Therapeutics, LLC
		DATE OF NAME CHANGE:	20170316

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Merck & Co., Inc.
		CENTRAL INDEX KEY:			0000310158
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				221918501
		STATE OF INCORPORATION:			NJ
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		2000 GALLOPING HILL ROAD
		CITY:			KENILWORTH
		STATE:			NJ
		ZIP:			07033
		BUSINESS PHONE:		908-740-4000

	MAIL ADDRESS:	
		STREET 1:		2000 GALLOPING HILL ROAD
		CITY:			KENILWORTH
		STATE:			NJ
		ZIP:			07033

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Merck & Co. Inc.
		DATE OF NAME CHANGE:	20091103

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SCHERING PLOUGH CORP
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center">UNITED STATES</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center">SECURITIES AND EXCHANGE COMMISSION</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center">Washington, D.C. 20549</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center">SCHEDULE 13G</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center">Under the Securities Exchange Act of 1934<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif"><br>
</font> (Amendment No.&#160; )*</div>

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<div style="FONT-SIZE: 18pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center">Spero Therapeutics, Inc.

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center">Common Stock, par value $0.001 per share

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center">84833T103

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<div style="MARGIN-BOTTOM: 12pt; FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center">(CUSIP Number)</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center">November 6, 2017

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Check the appropriate box to designate the rule pursuant to which this Schedule is filed:</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Rule 13d-1(b)</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Rule 13d-1(c)</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Rule 13d-1(d)</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">*The remainder of this cover page shall be filled out for a reporting person&#8217;s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">The information required in the remainder of this cover page shall not be deemed to be &#8220;filed&#8221; for the purpose of Section 18 of the Securities Exchange Act of 1934 (&#8220;Act&#8221;) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).<br>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">CUSIP No.&#160;<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold">84833T103</font></div>
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<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Merck &amp; Co., Inc.</div>
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<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP</div>
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<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">SEC USE ONLY</div>
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<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">4</div>
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<div style="TEXT-ALIGN: left">CITIZENSHIP OR PLACE OF ORGANIZATION</div>
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<div style="TEXT-ALIGN: left">&#160;</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">New Jersey</div>
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<div style="TEXT-ALIGN: left">&#160;</div>
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<div style="TEXT-ALIGN: left">&#160;</div>
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<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
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<div style="TEXT-ALIGN: center">NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH</div>
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<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">5</div>
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<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">SOLE VOTING POWER</div>
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<div style="TEXT-ALIGN: left">&#160;</div>
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<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">0 shares</div>
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<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
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<tr>
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<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
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<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">6</div>
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<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">SHARED VOTING POWER</div>
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<div style="TEXT-ALIGN: left">&#160;</div>
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<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
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<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">935,942 shares</div>
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<div style="TEXT-ALIGN: left">&#160;</div>
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<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
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<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">7</div>
</td>
<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">SOLE DISPOSITIVE POWER</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">0 shares</div>
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<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">8</div>
</td>
<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">SHARED DISPOSITIVE POWER</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">935,942 shares</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">9</div>
</td>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">935,942 shares</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">10</div>
</td>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">CHECK IF THE AGGREGATE AMOUNT IN ROW (9)&#160;EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="2" colspan="3">
<div style="FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">&#9744;</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">11</div>
</td>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">6.5%*</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">12</div>
</td>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">HC</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>
</table>

<br>
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">* Based on 14,369,182 shares of Common Stock outstanding as of November 14, 2017, according to information received from the Issuer.</div>
</div>

<div>&#160;</div>

<div id="DSPFPageBreakArea" style="MARGIN-BOTTOM: 10pt; CLEAR: both; MARGIN-TOP: 10pt">
<div id="DSPFPageBreak" style="PAGE-BREAK-AFTER: always">
<hr style="BORDER-LEFT-WIDTH: 0px; HEIGHT: 2px; BORDER-RIGHT-WIDTH: 0px; WIDTH: 100%; BORDER-BOTTOM-WIDTH: 0px; COLOR: #000000; CLEAR: both; MARGIN: 4px 0px; BORDER-TOP-WIDTH: 0px; BACKGROUND-COLOR: #000000" noshade="noshade">
</div>
</div>

<div>
<table id="z4a2d9f8428054152bc9608472facbf6e" style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; WIDTH: 100%" cellspacing="0" cellpadding="0">
<tr>
<td style="WIDTH: 100%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 2px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">CUSIP No.&#160;<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold">84833T103</font></div>
</td>
</tr>
</table>
</div>

<div>&#160;</div>

<div>
<table id="z35c9c1fd777f4f8daf8c93a9eaed3c81" style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; WIDTH: 100%; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="2" border="0">
<tr>
<td style="BORDER-TOP: #000000 1pt solid; WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="4">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">1</div>
</td>
<td style="BORDER-TOP: #000000 1pt solid; WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">NAMES OF REPORTING PERSONS</div>
</td>
<td style="BORDER-TOP: #000000 1pt solid; WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-TOP: #000000 1pt solid; BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 86.69%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Merck Sharp &amp; Dohme Corp.</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">2</div>
</td>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">&#160;</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: middle">&#160;</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="TEXT-ALIGN: left">(a)<font style="FONT-FAMILY: 'Times New Roman'">&#9744;</font></div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">&#160;</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: middle">&#160;</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="TEXT-ALIGN: left">(b)<font style="FONT-FAMILY: ''Times New Roman''">&#9744;</font></div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">3</div>
</td>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid; BACKGROUND-COLOR: #bfbfbf" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">SEC USE ONLY</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BACKGROUND-COLOR: #bfbfbf">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BACKGROUND-COLOR: #bfbfbf">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr style="BACKGROUND-COLOR: #bfbfbf">
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="2" colspan="3">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr style="BACKGROUND-COLOR: #bfbfbf">
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">4</div>
</td>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; FONT-WEIGHT: bold; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="TEXT-ALIGN: left">CITIZENSHIP OR PLACE OF ORGANIZATION</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">New Jersey</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 12.71%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; FONT-WEIGHT: bold; BORDER-LEFT: #000000 1pt solid" rowspan="12" colspan="2">
<div style="TEXT-ALIGN: center">NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH</div>
</td>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">5</div>
</td>
<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">SOLE VOTING POWER</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">0 shares</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">6</div>
</td>
<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">SHARED VOTING POWER</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">935,942 shares</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">7</div>
</td>
<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">SOLE DISPOSITIVE POWER</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">0 shares</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">8</div>
</td>
<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">SHARED DISPOSITIVE POWER</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">935,942 shares</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">9</div>
</td>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">935,942 shares</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">10</div>
</td>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">CHECK IF THE AGGREGATE AMOUNT IN ROW (9)&#160;EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="2" colspan="3">
<div style="FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">&#9744;</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">11</div>
</td>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">6.5%*</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">12</div>
</td>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">HC</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>
</table>
</div>

<div>&#160;</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">* Based on 14,369,182 shares of Common Stock outstanding as of November 14, 2017, according to information received from the Issuer.</div>

<div>&#160;</div>

<div id="DSPFPageBreakArea" style="MARGIN-BOTTOM: 10pt; CLEAR: both; MARGIN-TOP: 10pt">
<div id="DSPFPageBreak" style="PAGE-BREAK-AFTER: always">
<hr style="BORDER-LEFT-WIDTH: 0px; HEIGHT: 2px; BORDER-RIGHT-WIDTH: 0px; WIDTH: 100%; BORDER-BOTTOM-WIDTH: 0px; COLOR: #000000; CLEAR: both; MARGIN: 4px 0px; BORDER-TOP-WIDTH: 0px; BACKGROUND-COLOR: #000000" noshade="noshade">
</div>
</div>

<div>
<table id="zf1ec4691e5164a378fc51f7be80413b9" style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; WIDTH: 100%" cellspacing="0" cellpadding="0">
<tr>
<td style="WIDTH: 100%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 2px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">CUSIP No.&#160;<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold">84833T103</font></div>
</td>
</tr>
</table>
</div>

<div>&#160;</div>

<div>
<table id="zbe5f926bfb034184aa02ca9e44dcc5f9" style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; WIDTH: 100%; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="2" border="0">
<tr>
<td style="BORDER-TOP: #000000 1pt solid; WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="4">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">1</div>
</td>
<td style="BORDER-TOP: #000000 1pt solid; WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">NAMES OF REPORTING PERSONS</div>
</td>
<td style="BORDER-TOP: #000000 1pt solid; WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-TOP: #000000 1pt solid; BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 86.69%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">MRL Ventures Fund LLC</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">2</div>
</td>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">&#160;</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: middle">&#160;</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="TEXT-ALIGN: left">(a)<font style="FONT-FAMILY: 'Times New Roman'">&#9744;</font></div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">&#160;</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: middle">&#160;</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="TEXT-ALIGN: left">(b)<font style="FONT-FAMILY: ''Times New Roman''">&#9744;</font></div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">3</div>
</td>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid; BACKGROUND-COLOR: #bfbfbf" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">SEC USE ONLY</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BACKGROUND-COLOR: #bfbfbf">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BACKGROUND-COLOR: #bfbfbf">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr style="BACKGROUND-COLOR: #bfbfbf">
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="2" colspan="3">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr style="BACKGROUND-COLOR: #bfbfbf">
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">4</div>
</td>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; FONT-WEIGHT: bold; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="TEXT-ALIGN: left">CITIZENSHIP OR PLACE OF ORGANIZATION</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Delaware</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 12.71%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; FONT-WEIGHT: bold; BORDER-LEFT: #000000 1pt solid" rowspan="12" colspan="2">
<div style="TEXT-ALIGN: center">NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH</div>
</td>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">5</div>
</td>
<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">SOLE VOTING POWER</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">0 shares</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">6</div>
</td>
<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">SHARED VOTING POWER</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">935,942 shares</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">7</div>
</td>
<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">SOLE DISPOSITIVE POWER</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">0 shares</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">8</div>
</td>
<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">SHARED DISPOSITIVE POWER</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 80.18%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">935,942 shares</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr style="HEIGHT: 23px">
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">9</div>
</td>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">935,942 shares</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">10</div>
</td>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">CHECK IF THE AGGREGATE AMOUNT IN ROW (9)&#160;EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="2" colspan="3">
<div style="FONT-FAMILY: 'Times New Roman'; TEXT-ALIGN: left">&#9744;</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">11</div>
</td>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">6.5%*</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 6.36%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" rowspan="3">
<div style="FONT-SIZE: 18pt; FONT-WEIGHT: bold; TEXT-ALIGN: center">12</div>
</td>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-LEFT: #000000 1pt solid" colspan="3">
<div style="FONT-WEIGHT: bold; TEXT-ALIGN: left">TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 89.86%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid; PADDING-LEFT: 2pt; BORDER-LEFT: #000000 1pt solid" rowspan="2" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">PN</div>
</td>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>

<tr>
<td style="WIDTH: 2.05%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
<td style="BORDER-RIGHT: #000000 1pt solid; WIDTH: 1.74%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1pt solid">
<div style="TEXT-ALIGN: left">&#160;</div>
</td>
</tr>
</table>
</div>

<div>&#160;</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">* Based on 14,369,182 shares of Common Stock outstanding as of November 14, 2017, according to information received from the Issuer.</div>

<div>&#160;</div>

<div id="DSPFPageBreakArea" style="MARGIN-BOTTOM: 10pt; CLEAR: both; MARGIN-TOP: 10pt">
<div id="DSPFPageBreak" style="PAGE-BREAK-AFTER: always">
<hr style="BORDER-LEFT-WIDTH: 0px; HEIGHT: 2px; BORDER-RIGHT-WIDTH: 0px; WIDTH: 100%; BORDER-BOTTOM-WIDTH: 0px; COLOR: #000000; CLEAR: both; MARGIN: 4px 0px; BORDER-TOP-WIDTH: 0px; BACKGROUND-COLOR: #000000" noshade="noshade">
</div>
</div>

<div>&#160;</div>

<div>
<table id="zf078a9392e8448c2a4ec9d31823bde4e" style="FONT-SIZE: 10pt; BORDER-TOP: medium none; FONT-FAMILY: 'Times New Roman', Times, serif; BORDER-RIGHT: medium none; WIDTH: 100%; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" cellspacing="0" cellpadding="0" border="0">
<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="4">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">Item 1.</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(a)</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 2px solid; BORDER-LEFT: medium none" colspan="2">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Name of Issuer:<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif"><br>
</font> Spero Therapeutics, Inc.</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="2">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(b)</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 2px solid; BORDER-LEFT: medium none" colspan="2">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Address of Issuer&#8217;s Principal Executive Offices:<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif"><br>
</font>675 Massachusetts Avenue, 14<sup style="vertical-align: text-top; line-height: 1; font-size: smaller">th</sup> Floor</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Cambridge, Massachusetts 02139</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="4">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="4">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">Item 2.</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(a)</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 2px solid; BORDER-LEFT: medium none" colspan="2">
<div style="TEXT-ALIGN: left"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif">Name of Person Filing:<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif"><br>
</font></font> &#160;</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(1) Merck &amp; Co., Inc.</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(2) Merck Sharp &amp; Dohme Corp.</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(3) MRL Ventures Fund LLC</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="2">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(b)</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 2px solid; BORDER-LEFT: medium none" colspan="2">
<div style="TEXT-ALIGN: left"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif">Address of Principal Business Office or, if none, Residence:<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif"><br>
</font></font> &#160;</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(1) Merck &amp; Co., Inc.: 2000 Galloping Hill Road, Kenilworth, NJ 07033</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(2) Merck Sharp &amp; Dohme Corp.: One Merck Drive, Whitehouse Station, NJ 08889</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(3) MRL Ventures Fund LLC: 320 Bent Street, Cambridge, Massachusetts 02141</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="2">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(c)</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 2px solid; BORDER-LEFT: medium none" colspan="2">
<div style="TEXT-ALIGN: left"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif">Citizenship:<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif"><br>
</font></font> &#160;</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(1) Merck &amp; Co., Inc.: New Jersey</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(2) Merck Sharp &amp; Dohme Corp.: New Jersey</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(3) MRL Ventures Fund LLC: Delaware</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="2">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(d)</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 2px solid; BORDER-LEFT: medium none" colspan="2">
<div style="TEXT-ALIGN: left"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif">Title of Class of Securities:<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif"><br>
</font></font> &#160;</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Common Stock, par value $0.001 per share</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="2">&#160;</td>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(e)</div>
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<div style="TEXT-ALIGN: left"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif">CUSIP Number:<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif"><br>
</font></font> &#160;</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">84833T103</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">Item 3.</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">If this statement is filed pursuant to &#167;&#167;240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(a)</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; MARGIN-LEFT: 22pt; TEXT-INDENT: -22pt">&#9744;</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(b)</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; MARGIN-LEFT: 22pt; TEXT-INDENT: -22pt">&#9744;</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(c)</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; MARGIN-LEFT: 22pt; TEXT-INDENT: -22pt">&#9744;</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(d)</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; MARGIN-LEFT: 22pt; TEXT-INDENT: -22pt">&#9744;</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(e)</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; MARGIN-LEFT: 22pt; TEXT-INDENT: -22pt">&#9744;</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">An investment adviser in accordance with &#167;240.13d-1(b)(1)(ii)(E);</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(f)</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; MARGIN-LEFT: 22pt; TEXT-INDENT: -22pt">&#9744;</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">An employee benefit plan or endowment fund in accordance with &#167;240.13d-1(b)(1)(ii)(F);</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(g)</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; MARGIN-LEFT: 22pt; TEXT-INDENT: -22pt">&#9744;</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">A parent holding company or control person in accordance with &#167;240.13d-1(b)(1)(ii)(G);</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(h)</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; MARGIN-LEFT: 22pt; TEXT-INDENT: -22pt">&#9744;</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(i)</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; MARGIN-LEFT: 22pt; TEXT-INDENT: -22pt">&#9744;</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(j)</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; MARGIN-LEFT: 22pt; TEXT-INDENT: -22pt">&#9744;</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">A non-U.S. institution in accordance with &#167; 240.13d&#8211;1(b)(1)(ii)(J);</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">(k)</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; MARGIN-LEFT: 22pt; TEXT-INDENT: -22pt">&#9744;</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Group, in accordance with &#167; 240.13d&#8211;1(b)(1)(ii)(K). If filing as a non-U.S. institution in accordance with &#167; 240.13d&#8211;1(b)(1)(ii)(J), please specify the type of institution:</div>
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</table>

<div><br>
</div>

<table id="z0554ae150f8b413ba98dab23c3cdbdaf" style="FONT-SIZE: 10pt; BORDER-TOP: medium none; FONT-FAMILY: 'Times New Roman', Times, serif; BORDER-RIGHT: medium none; WIDTH: 100%; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" cellspacing="0" cellpadding="0" border="0">
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">Item 4.</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">Ownership</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="3">&#160;</td>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="4">&#160;</td>
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<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center">(a)</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-LEFT: medium none" colspan="2">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Amount beneficially owned: 935,942</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">The reported securities are owned directly by (3) MRL Ventures Fund LLC (&#8220;MRL&#8221;), which is a wholly owned subsidiary of Merck Sharp &amp; Dohme Corp. (&#8220;MSD&#8221;), which is a wholly owned subsidiary of Merck &amp; Co., Inc. (&#8220;Merck&#8221;). Merck and MSD are indirect beneficial owners of the reported securities.</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 2px solid; BORDER-LEFT: medium none" colspan="2">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="2">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center">(b)</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="2">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Percent of class: 6.5%</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 2px solid; BORDER-LEFT: medium none" colspan="2">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="2">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center">(c)</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="2">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Number of shares as to which the person has:</div>
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<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 2px solid; BORDER-LEFT: medium none" colspan="2">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="2">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center">(i)</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: middle; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Sole power to vote or to direct the vote: See Cover Pages Items 5-8.</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 2px solid; BORDER-LEFT: medium none">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center">(ii)</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: middle; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Shared power to vote or to direct the vote: See Cover Pages Items 5-8.</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 2px solid; BORDER-LEFT: medium none">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center">(iii)</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: middle; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Sole power to dispose or to direct the disposition of: See Cover Pages Items 5-8.</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 2px solid; BORDER-LEFT: medium none">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center">(iv)</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: middle; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Shared power to dispose or to direct the disposition of: See Cover Pages Items 5-8.</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: #000000 2px solid; BORDER-LEFT: medium none">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 2%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 90%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="4">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">Item 5.</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">Ownership of Five Percent or Less of a Class</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="3">&#160;</td>
</tr>

<tr style="HEIGHT: 12px">
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="4">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following.&#160;&#160; <font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif">&#9744;</font></div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="4">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">Item 6.</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">Ownership of More than Five Percent on Behalf of Another Person</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="3">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="4">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Not applicable.</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="4">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">Item 7.</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: top; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="3">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="4">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">The reported securities are owned directly by MRL, which is a wholly owned subsidiary of MSD, which is a wholly owned subsidiary of Merck. Merck and MSD are indirect beneficial owners of the reported securities.</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="4">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">Item 8.</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">Identification and Classification of Members of the Group</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="3">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="4">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Not applicable.</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="4">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">Item 9.</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">Notice of Dissolution of Group</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="3">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="4">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Not applicable.</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="4">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">Item 10.</div>
</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="3">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">Certifications</div>
</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; WIDTH: 6%; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none">&#160;</td>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="3">&#160;</td>
</tr>

<tr>
<td style="BORDER-TOP: medium none; BORDER-RIGHT: medium none; VERTICAL-ALIGN: middle; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none" colspan="4">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">By signing below, each of the undersigned certifies that, to the best of each such signatory&#8217;s knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.</div>
</td>
</tr>
</table>
</div>

<div>&#160;</div>

<div>&#160;</div>

<div id="DSPFPageBreakArea" style="MARGIN-BOTTOM: 10pt; CLEAR: both; MARGIN-TOP: 10pt">
<div id="DSPFPageBreak" style="PAGE-BREAK-AFTER: always">
<hr style="BORDER-LEFT-WIDTH: 0px; HEIGHT: 2px; BORDER-RIGHT-WIDTH: 0px; WIDTH: 100%; BORDER-BOTTOM-WIDTH: 0px; COLOR: #000000; CLEAR: both; MARGIN: 4px 0px; BORDER-TOP-WIDTH: 0px; BACKGROUND-COLOR: #000000" noshade="noshade">
</div>
</div>

<div>&#160;</div>

<div>
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center">Signatures</div>

<div><br>
</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">After reasonable inquiry and to the best of the knowledge and belief of each of the undersigned, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.</div>

<div><br>
</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; MARGIN-LEFT: 36pt">November 15, 2017</div>
</div>

<div>&#160;</div>

<div>&#160;</div>

<div>
<table id="z5d59524f1e5a4c038d2094aaee875ed6" style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; WIDTH: 100%" cellspacing="0" cellpadding="0">
<tr>
<td style="WIDTH: 50%; VERTICAL-ALIGN: top">&#160;</td>
<td style="WIDTH: 50%; VERTICAL-ALIGN: bottom">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">MERCK &amp; CO., INC.</div>
</td>
</tr>

<tr>
<td style="WIDTH: 50%; VERTICAL-ALIGN: top">&#160;</td>
<td style="WIDTH: 50%; VERTICAL-ALIGN: bottom">&#160;</td>
</tr>

<tr>
<td style="WIDTH: 50%; VERTICAL-ALIGN: top">&#160;</td>
<td style="WIDTH: 50%; VERTICAL-ALIGN: bottom; BORDER-BOTTOM: #000000 2px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif"><br>
</font> /s/ Katie Fedosz</div>
</td>
</tr>

<tr>
<td style="WIDTH: 50%; VERTICAL-ALIGN: top">&#160;</td>
<td style="WIDTH: 50%; VERTICAL-ALIGN: bottom">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center">Signature</div>
</td>
</tr>

<tr>
<td style="WIDTH: 50%; VERTICAL-ALIGN: top">&#160;</td>
<td style="WIDTH: 50%; VERTICAL-ALIGN: bottom; BORDER-BOTTOM: #000000 2px solid">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif"><br>
</font> Senior Assistant Secretary</div>
</td>
</tr>

<tr>
<td style="WIDTH: 50%; VERTICAL-ALIGN: top">&#160;</td>
<td style="WIDTH: 50%; VERTICAL-ALIGN: bottom">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center">Name/Title</div>
</td>
</tr>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">MERCK SHARP &amp; DOHME CORP.</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">By: MERCK SHARP &amp; DOHME CORP., its managing member</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center">EXHIBIT INDEX</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">Exhibit No.</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left">Description</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">99.1</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left"><a href="jb13gmerck-ex99_1.htm">Joint Filing Agreement</a></div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-VARIANT: normal; FONT-WEIGHT: bold; FONT-STYLE: normal; TEXT-ALIGN: right">Exhibit 99.1</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center">JOINT FILING AGREEMENT</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; TEXT-INDENT: 36pt">In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, each of the persons named below agrees to the joint filing of a Statement on Schedule 13G (including amendments thereto) with respect to the common stock, $0.001 par value per share, of Spero Therapeutics, Inc., a Delaware corporation, and further agrees that this Joint Filing Agreement be included as an exhibit to such filings provided that, as contemplated by Section 13d-1(k)(1)(ii), no person shall be responsible for the completeness or accuracy of the information concerning the other persons making this filing, unless such person knows or has reason to believe that such information is in accurate. This Joint Filing Agreement may be executed in any number of counterparts, all of which together shall constitute one and the same instrument.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; MARGIN-LEFT: 36pt">November 15, 2017</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">MERCK &amp; CO., INC.</div>
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</font> /s/ Katie Fedosz</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif"><br>
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<div style="font-size: 10pt; font-family: 'Times New Roman', Times, serif; text-align: left;">MERCK SHARP &amp; DOHME CORP.</div>
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</font> /s/ Katie Fedosz</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">MRL VENTURES FUND LLC</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">By: MERCK SHARP &amp; DOHME CORP., its managing member</div>
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