<SEC-DOCUMENT>0000935836-24-000780.txt : 20241226
<SEC-HEADER>0000935836-24-000780.hdr.sgml : 20241226
<ACCEPTANCE-DATETIME>20241226124634
ACCESSION NUMBER:		0000935836-24-000780
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20241219
FILED AS OF DATE:		20241226
DATE AS OF CHANGE:		20241226

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			EcoR1 Capital, LLC
		CENTRAL INDEX KEY:			0001587114
		ORGANIZATION NAME:           	
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-41535
		FILM NUMBER:		241580045

	BUSINESS ADDRESS:	
		STREET 1:		357 TEHAMA STREET #3
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94103
		BUSINESS PHONE:		415-448-6534

	MAIL ADDRESS:	
		STREET 1:		357 TEHAMA STREET #3
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94103

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Zymeworks Inc.
		CENTRAL INDEX KEY:			0001937653
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		108 PATRIOT DRIVE, SUITE A
		CITY:			MIDDLETOWN
		STATE:			DE
		ZIP:			19709
		BUSINESS PHONE:		302-274-8744

	MAIL ADDRESS:	
		STREET 1:		108 PATRIOT DRIVE, SUITE A
		CITY:			MIDDLETOWN
		STATE:			DE
		ZIP:			19709

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Zymeworks Delaware Inc.
		DATE OF NAME CHANGE:	20220712
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>ownership.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2024-12-19</periodOfReport>

    <dateOfOriginalSubmission>2024-12-23</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001937653</issuerCik>
        <issuerName>Zymeworks Inc.</issuerName>
        <issuerTradingSymbol>ZYME</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001587114</rptOwnerCik>
            <rptOwnerName>EcoR1 Capital, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>357 TEHAMA STREET #3</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94103</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2024-12-19</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>298818</value>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>13.5289</value>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>13736291</value>
                    <footnoteId id="F5"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Note</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2024-12-20</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>704488</value>
                    <footnoteId id="F6"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.0776</value>
                    <footnoteId id="F7"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>14440779</value>
                    <footnoteId id="F8"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Note</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2024-12-23</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>251502</value>
                    <footnoteId id="F9"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.2508</value>
                    <footnoteId id="F10"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>14692281</value>
                    <footnoteId id="F11"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Note</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This transaction was inadvertently omitted from the Form 4 filed on 12/23/2024.</footnote>
        <footnote id="F2">The reporting persons are EcoR1 Capital, LLC (&quot;EcoR1&quot;), Oleg Nodelman and EcoR1 Capital Fund Qualified, L.P. (&quot;Qualified Fund&quot;). EcoR1 is the general partner and investment adviser of private funds, including Qualified Fund (the &quot;Funds&quot;). Mr. Nodelman is the manager and controlling owner of EcoR1. EcoR1 is filing this Form 4 for itself, Mr. Nodelman and Qualified Fund. The filers are filing this Form 4 jointly, but not as a group, and each expressly disclaims membership in a group within the meaning of Rule 13d-5(b) under the Securities Exchange Act of 1934. The Funds hold these securities directly for the benefit of their investors. EcoR1 may be deemed to indirectly beneficially own them as the investment adviser to the Funds. Mr. Nodelman may be deemed to indirectly beneficially own them as the control person of EcoR1. The filers disclaim beneficial ownership of the securities except to the extent of their respective pecuniary interests therein.</footnote>
        <footnote id="F3">Qualified Fund purchased 281,218 of the shares purchased in this transaction.</footnote>
        <footnote id="F4">The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.3758 to $13.58, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnotes 4, 7 and 10.</footnote>
        <footnote id="F5">After this transaction, Qualified Fund held 12,939,442 shares of the Issuer's Common Stock.</footnote>
        <footnote id="F6">Qualified Fund purchased 662,995 of the shares purchased in this transaction.</footnote>
        <footnote id="F7">The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.6517 to $14.1388, inclusive.</footnote>
        <footnote id="F8">After this transaction, Qualified Fund held 13,602,437 shares of the Issuer's Common Stock.</footnote>
        <footnote id="F9">Qualified Fund purchased 236,691 of the shares purchased in this transaction.</footnote>
        <footnote id="F10">The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $14.1957 to $14.2713, inclusive.</footnote>
        <footnote id="F11">After this transaction, Qualified Fund held 13,839,128 shares of the Issuer's Common Stock.</footnote>
    </footnotes>

    <remarks>This amendment is being filed to restate the Form 4 filed by the reporting person on 12/23/2024. The Form 4 filed on 12/23/2024 inadvertently omitted transactions in the Issuer's Common Stock that occurred on 12/19, 12/20 and 12/23/2024 and included a transaction in pre-funded warrants of the Issuer that occurred on 12/26/2023. The transaction in pre-funded warrants was previously reported on a Form 4 filed by the reporting person on 12/28/2023. This amendment is being filed to add the transactions in the Issuer's Common Stock that had been omitted, to remove the reference to the 12/26/2023 transaction in pre-funded warrants of the Issuer and to change the date of the earliest transaction required to be reported in this Form 4 to 12/19/2024. Scott Platshon, an employee of EcoR1, serves as a director of the Issuer and was nominated for the board by EcoR1 and the Funds.</remarks>

    <ownerSignature>
        <signatureName>/s/ Oleg Nodelman</signatureName>
        <signatureDate>2024-12-24</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
