Contact

Corporate headquarters

XOMA Corporation
2200 Powell Street, Suite 310
Emeryville, CA 94608
(510) 204-7200

Product and technology licensing and partnerships

We encourage holders of royalty licenses to pre-commercial therapeutic assets that are in active development to contact us regarding our interest in acquiring that license. 

Business Development 
XOMA Corporation
(510) 204-7200
BizDevInfo@xoma.com

Investors and news media

Shareholders, investors, brokers, analysts and the media may contact our investor relations department:
(510) 204-7276 or InvestorRelations@xoma.com

For inquiries regarding share ownership, transfer, etc., please contact XOMA’s transfer agent:

American Stock Transfer & Trust Company (AST)
Attention: XOMA Corporation
6201 15th Avenue
Brooklyn, NY  11219
https://www.astfinancial.com

Shareholders can email inquiries to help@astfinancial.com

An AST shareholder services representative can be reached at 800-937-5449 or 718-921-8124 between the hours of 8 a.m. and 8 p.m. Eastern Time, Monday through Friday. An Interactive Voice Response System is available 24 hours a day, seven days a week.