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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 CeohpmrlkWd/lbFn/ijKC3d+D+olO/K0tfm8ewewn15vXkEfjWnqSM5qY5vgb7mn
 yT8SUFtru3j+DL0BdvmFWw==

<SEC-DOCUMENT>0001179110-09-016695.txt : 20091210
<SEC-HEADER>0001179110-09-016695.hdr.sgml : 20091210
<ACCEPTANCE-DATETIME>20091210155729
ACCESSION NUMBER:		0001179110-09-016695
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20091125
FILED AS OF DATE:		20091210
DATE AS OF CHANGE:		20091210

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			JACKSON MICHAEL K
		CENTRAL INDEX KEY:			0001287535

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-16614
		FILM NUMBER:		091233784

	MAIL ADDRESS:	
		STREET 1:		300 ELLIOTT AVE W STE 500
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			981194114

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PONIARD PHARMACEUTICALS, INC.
		CENTRAL INDEX KEY:			0000755806
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				911261311
		STATE OF INCORPORATION:			WA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		7000 SHORELINE COURT
		STREET 2:		SUITE 270
		CITY:			SO. SAN FRANCISCO
		STATE:			CA
		ZIP:			94080
		BUSINESS PHONE:		2062862501

	MAIL ADDRESS:	
		STREET 1:		300 ELLIOTT AVENUE WEST
		STREET 2:		SUITE 500
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98119-4114

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NEORX CORP
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4/A -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2009-11-25</periodOfReport>

    <dateOfOriginalSubmission>2009-11-30</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000755806</issuerCik>
        <issuerName>PONIARD PHARMACEUTICALS, INC.</issuerName>
        <issuerTradingSymbol>PARD</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001287535</rptOwnerCik>
            <rptOwnerName>JACKSON MICHAEL K</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>300 ELLIOTT AVE WEST</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 500</rptOwnerStreet2>
            <rptOwnerCity>SEATTLE</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>98119</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Principal Accounting Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2009-11-25</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>751</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.23</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4005</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The reporting person is amending the Form 4 originally filed to report this transaction for the purpose of reflecting a different transaction code applicable to the transaction.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Michael K. Jackson</signatureName>
        <signatureDate>2009-12-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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