The XOMA Corporation logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=5960Forward- Lookin g Statements The statements contained herein concerning XOMA's expectations regarding the completion, size and terms of the proposed public offering and the anticipated net proceeds from the offering are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. These statements are based on assumptions that may not prove accurate. Actual results could differ materially from those anticipated due to certain risks, including the proposed offering is subject to the satisfaction of customary closing conditions. There can be no assurance that XOMA will be able to complete the public offering on the anticipated terms, or at all. Risks and uncertainties relating to XOMA and this offering can be found in the "Risk Factors" section of the preliminary prospectus supplement related to the proposed offering filed with the SEC. XOMA undertakes no duty or obligation to update any forward-looking statements contained in this release as a result of new information, future events or changes in XOMA's expectations.
CONTACT: XOMA Corporation Company and Investor Contact: Ashleigh Barreto 510-204-7482 firstname.lastname@example.org Juliane Snowden The Oratorium Group, LLC email@example.com Media Contact: Canale Communications Carolyn Hawley 619-849-5375 firstname.lastname@example.org