<SEC-DOCUMENT>0001213900-26-029784.txt : 20260318
<SEC-HEADER>0001213900-26-029784.hdr.sgml : 20260318
<ACCEPTANCE-DATETIME>20260318080635
ACCESSION NUMBER:		0001213900-26-029784
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20260318
FILED AS OF DATE:		20260318
DATE AS OF CHANGE:		20260318

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Yan Andrew Y
		CENTRAL INDEX KEY:			0001305509
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32371
		FILM NUMBER:		26765513

	MAIL ADDRESS:	
		STREET 1:		SUITES 2516-2520
		STREET 2:		TWO PACIFIC PLACE
		CITY:			88 QUEENSWAY
		STATE:			K3
		ZIP:			00000

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SINOVAC BIOTECH LTD
		CENTRAL INDEX KEY:			0001084201
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		EIN:				000000000
		STATE OF INCORPORATION:			B9
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		ADDRESS IS A NON US LOCATION: 	YES
		STREET 1:		NO. 39 SHANGDI XI ROAD
		STREET 2:		HAIDIAN DISTRICT
		CITY:			BEIJING
		NON US STATE TERRITORY:  	CHINA
		PROVINCE COUNTRY:   	F4
		ZIP:			100085
		BUSINESS PHONE:		86-10-82799800

	MAIL ADDRESS:	
		ADDRESS IS A NON US LOCATION: 	YES
		STREET 1:		NO. 39 SHANGDI XI ROAD
		STREET 2:		HAIDIAN DISTRICT
		CITY:			BEIJING
		NON US STATE TERRITORY:  	CHINA
		PROVINCE COUNTRY:   	F4
		ZIP:			100085

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NET FORCE SYSTEMS INC
		DATE OF NAME CHANGE:	19991110
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>ownership.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0607</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2026-03-18</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001084201</issuerCik>
        <issuerName>SINOVAC BIOTECH LTD</issuerName>
        <issuerTradingSymbol>SVA</issuerTradingSymbol>
        <issuerForeignTradingSymbol></issuerForeignTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001305509</rptOwnerCik>
            <rptOwnerName>Yan Andrew Y</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>SUITE 1102, 11/F, FIVE PACIFIC PLACE</rptOwnerStreet1>
            <rptOwnerStreet2>28 HENNESSY ROAD, WANCHAI</rptOwnerStreet2>
            <rptOwnerCity>HONG KONG</rptOwnerCity>
            <rptOwnerState></rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription>CHINA</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common shares, par value $0.001 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>10780820</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By SAIF Partners IV L.P.</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">a. The Reporting Person is a director and sole shareholder of SAIF IV GP Capital Ltd., which is the sole general partner of SAIF IV GP, L.P., the sole general partner of SAIF Partners IV L.P.

b. The Reporting Person may be deemed to beneficially own all the common shares, par value $0.001 per share, of the Issuer held by SAIF Partners IV L.P.

c. The Reporting Person disclaims beneficial ownership over such shares except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of the reported shares for purposes of Section 16 or for any other purposes.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Andrew Y. Yan</signatureName>
        <signatureDate>2026-03-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
