<SEC-DOCUMENT>0000791908-14-000150.txt : 20141117
<SEC-HEADER>0000791908-14-000150.hdr.sgml : 20141117
<ACCEPTANCE-DATETIME>20141117174421
ACCESSION NUMBER:		0000791908-14-000150
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20131113
FILED AS OF DATE:		20141117
DATE AS OF CHANGE:		20141117

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			XOMA Corp
		CENTRAL INDEX KEY:			0000791908
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				942756657
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2910 SEVENTH ST
		CITY:			BERKELEY
		STATE:			CA
		ZIP:			94710
		BUSINESS PHONE:		5106441170

	MAIL ADDRESS:	
		STREET 1:		2910 SEVENTH ST
		CITY:			BERKELEY
		STATE:			CA
		ZIP:			94710

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	XOMA LTD /DE/
		DATE OF NAME CHANGE:	19990107

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	XOMA CORP /DE/
		DATE OF NAME CHANGE:	19920703

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Varian John
		CENTRAL INDEX KEY:			0001416176

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-14710
		FILM NUMBER:		141228947

	MAIL ADDRESS:	
		STREET 1:		ARYX THERAPEUTICS,INC.
		STREET 2:		6300 DUMBARTON CIRCLE
		CITY:			FREMONT
		STATE:			CA
		ZIP:			94555
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
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<DESCRIPTION>PRIMARY DOCUMENT
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        <issuerName>XOMA Corp</issuerName>
        <issuerTradingSymbol>XOMA</issuerTradingSymbol>
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            <rptOwnerName>Varian John</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O XOMA CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>2910 SEVENTH STREET</rptOwnerStreet2>
            <rptOwnerCity>BERKELEY</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94710</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

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                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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                <transactionPricePerShare>
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        <nonDerivativeHolding>
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                <natureOfOwnership>
                    <value>by 401(k)</value>
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        </nonDerivativeHolding>
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    <derivativeTable>
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                <transactionPricePerShare>
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        </derivativeTransaction>
        <derivativeTransaction>
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                <transactionAcquiredDisposedCode>
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    <footnotes>
        <footnote id="F1">Shares sold on the open market to satisfy the maximum amount of taxes that may be required to be withheld in connection with the vesting of the shares in a non-discretionary transaction pursuant to the reporting person's agreement under the Company's equity incentive plan.</footnote>
        <footnote id="F2">These restricted stock units were granted on January 4, 2012 and are scheduled to vest in substantially equal installments on each of November 13, 2012, November 13, 2013 and November 14, 2014.</footnote>
        <footnote id="F3">Each restricted stock unit represents the right to receive, upon vesting, one share of common stock. This nondiscretionary transaction represents the vesting of restricted stock units as shares of common stock.</footnote>
        <footnote id="F4">These restricted stock units were granted on October 27, 2011 and are scheduled to vest in substantially equal installments on each of November 13, 2012, November 13, 2013 and November 14, 2014.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>By: Russell J. Wood For: John Varian</signatureName>
        <signatureDate>2014-11-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
