-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 SsvgSUjI2xNeyasVDBUbbzGzVLBF0qVSMLqBbtEn9/2UVPN3Vl4hfHib+Nozvroa
 dBqTxzvcp6GM7/5ZUj5Aiw==

<SEC-DOCUMENT>0001179110-07-011018.txt : 20070523
<SEC-HEADER>0001179110-07-011018.hdr.sgml : 20070523
<ACCEPTANCE-DATETIME>20070523130237
ACCESSION NUMBER:		0001179110-07-011018
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070504
FILED AS OF DATE:		20070523
DATE AS OF CHANGE:		20070523

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BASSO ROBERT S
		CENTRAL INDEX KEY:			0001197050

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-16614
		FILM NUMBER:		07873250

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		206-286-2501

	MAIL ADDRESS:	
		STREET 1:		P O BOX 1049
		CITY:			WOODLAND
		STATE:			CA
		ZIP:			95776

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PONIARD PHARMACEUTICALS, INC.
		CENTRAL INDEX KEY:			0000755806
		STANDARD INDUSTRIAL CLASSIFICATION:	IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES [2835]
		IRS NUMBER:				911261311
		STATE OF INCORPORATION:			WA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		300 ELLIOTT AVENUE WEST
		STREET 2:		SUITE 500
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98119-4114
		BUSINESS PHONE:		2062817001

	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>3
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 3 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2007-05-04</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001197050</rptOwnerCik>
            <rptOwnerName>BASSO ROBERT S</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>7000 SHORELINE CT</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 270</rptOwnerStreet2>
            <rptOwnerCity>SO. SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94080</rptOwnerZipCode>
            <rptOwnerStateDescription></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>Poniard common stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>/s/ Michael K. Jackson</signatureName>
        <signatureDate>2007-05-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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