<SEC-DOCUMENT>0001214659-21-005812.txt : 20210521
<SEC-HEADER>0001214659-21-005812.hdr.sgml : 20210521
<ACCEPTANCE-DATETIME>20210521163035
ACCESSION NUMBER:		0001214659-21-005812
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20210519
FILED AS OF DATE:		20210521
DATE AS OF CHANGE:		20210521

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LIMBER JOSEPH M
		CENTRAL INDEX KEY:			0001216023

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39801
		FILM NUMBER:		21949448

	MAIL ADDRESS:	
		STREET 1:		ACLARA BIOSCIENCES INC
		STREET 2:		1288 PEAR AVE
		CITY:			MOUNTAIN VIEW
		STATE:			CA
		ZIP:			94043

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			XOMA Corp
		CENTRAL INDEX KEY:			0000791908
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				522154066
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2200 POWELL STREET
		STREET 2:		SUITE 310
		CITY:			EMERYVILLE
		STATE:			CA
		ZIP:			94608
		BUSINESS PHONE:		510-204-7239

	MAIL ADDRESS:	
		STREET 1:		2200 POWELL STREET
		STREET 2:		SUITE 310
		CITY:			EMERYVILLE
		STATE:			CA
		ZIP:			94608

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>marketforms-52858.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
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<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-05-19</periodOfReport>

    <issuer>
        <issuerCik>0000791908</issuerCik>
        <issuerName>XOMA Corp</issuerName>
        <issuerTradingSymbol>XOMA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001216023</rptOwnerCik>
            <rptOwnerName>LIMBER JOSEPH M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O XOMA CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>2200 POWELL STREET, SUITE 310</rptOwnerStreet2>
            <rptOwnerCity>EMERYVILLE</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94608</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Non-Qualified Share Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>31.04</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-05-19</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>5101</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2031-05-19</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Shares</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5101</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5101</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The shares subject to this option shall vest and become exercisable in equal monthly installments over the 12-month period following the date of grant (May 19, 2021), provided that the final installment will occur on the earlier of (i) the date of the next annual meeting of the Company's stockholders or (ii) the first anniversary of the date of grant of such option.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Thomas Burns, Attorney-in-Fact for Joseph M Limber</signatureName>
        <signatureDate>2021-05-21</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>poa.htm
<DESCRIPTION>POA DOCUMENT
<TEXT>
<html>
  <body>
    <pre>
      LIMITED POWER OF ATTORNEY FOR
SECTION 16(a) FILINGS
Know all by these presents, that the undersigned hereby constitutes and appoints
each of Thomas Burns, Bob Maddox, and Christine Theriault signing individually,
as the undersigned's true and lawful attorney-in-fact to:

(1)	Execute for and on behalf of the undersigned, in the undersigned's capacity
as an officer, director and/or stockholder of XOMA Corporation (the "Company" ),
Forms 3, 4, and 5 and amendments thereto in accordance with Section 16(a) of the
Securities Exchange Act of 1934, as amended (the "Exchange Act") and the rules
thereunder;

(2)	Do and perfonn any and all acts for and on behalf of the undersigned which
may be necessary or desirable to complete and execute any such Fonn 3, 4, or 5
or amendment thereto and timely file such fonn with the United States Securities
and Exchange Commission (the "SEC") and any stock exchange or similar authority;
and

(3)	Take any other action of any type whatsoever which, in the opinion of any
such attorney-in-fact, may be necessary or desirable in connection with the
foregoing authority, it being understood that the documents executed by and such
attomey in-fact on behalf of the undersigned pursuant to this Limited Power of
Attorney shall be in such form and shall contain such terms and conditions as
such attomey in-fact may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever required,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact ' s substitute or substitutes, shall lawfully do or cause to be
done by virtue of this Limited Power of Attorney and the rights and powers
herein granted. The undersigned acknowledges that each of the foregoing
attorney-in-facts, in serving in such capacity at the request of the
undersigned, is not assuming, nor is any Company assuming, any of the
undersigned's responsibilities to comply with Section 16 of the Exchange Act.
This Limited Power of Attorney shall remain in full force and effect until the
earlier to occur of (a) undersigned is no longer required to file Forms 3, 4,
and 5 with respect to any securities issued by the Company, (b) revocation by
the undersigned in a signed writing delivered to the foregoing attorney-in-fact
and (c) as to any attorney-in-fact individually, until such attomey-in fact is
no longer employed by the Company. This Limited Power of Attorney may be filed
with the SEC as a confirming statement of the authority granted herein.

[Signature Page Follows]

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of February 13, 2019.

Joseph M. Limber
    </pre>
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</DOCUMENT>
</SEC-DOCUMENT>
