    <SEC-DOCUMENT>0001193125-23-090883-index.html : 20230404
    <SEC-HEADER>0001193125-23-090883.hdr.sgml : 20230404
    <ACCEPTANCE-DATETIME>20230404161902
    ACCESSION NUMBER:		0001193125-23-090883
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		3
    FILED AS OF DATE:		20230404
    DATE AS OF CHANGE:		20230404

    FILER:

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

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-39801
    		FILM NUMBER:		23797889

    	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>DEFA14A
    <SEQUENCE>1
    <FILENAME>d280548ddefa14a.htm
    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: d280548ddefa14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>g280548g02a52.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: g280548g02a52.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>g280548g03b53.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: g280548g03b53.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>