BERKELEY, Calif., Oct. 23, 2012 (GLOBE NEWSWIRE) -- XOMA Corporation (Nasdaq:XOMA) announced today it is offering to sell, subject to market and other conditions, shares of its common stock pursuant to an effective shelf registration statement in an underwritten public offering. XOMA also expects to grant the underwriters a 30-day option to purchase up to an additional 15 percent of the shares of common stock offered in the public offering to cover over-allotments, if any. Credit Suisse Securities (USA) LLC and Cowen and Company, LLC are acting as joint book-running managers. The shares of common stock will be issued pursuant to a prospectus supplement filed as part of a shelf registration statement previously filed with the Securities and Exchange Commission (SEC) on Form S-3. This press release does not constitute an offer to sell or a solicitation of an offer to buy nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction. This press release is being issued pursuant to and in accordance with Rule 134 under the Securities Act of 1933, as amended. Any offer, if at all, will be made only by means of a prospectus supplement and accompanying prospectus forming a part of the effective registration statement. Copies of the prospectus supplement and accompanying prospectus relating to the offering may be obtained from Credit Suisse Securities (USA) LLC, Attention: Credit Suisse Prospectus Department, One Madison Avenue, New York, NY 10010; tel: 1-800-221-1037, or from Cowen and Company, LLC c/o Broadridge Financial Services, 1155 Long Island Avenue, Edgewood, NY 11717, Attn: Prospectus Department, Phone: 631-274-2806, Fax: 631-254-7140. XOMA intends to file a final prospectus supplement relating to the offering with the SEC, which will be available along with the accompanying prospectus filed with the SEC in connection with the shelf registration, on the SEC's website at http://www.sec.gov/ . Abou t XOMA XOMA discovers and develops innovative antibody therapeutics.