X0306 4 2016-07-21 0 0000791908 XOMA Corp XOMA 0001349376 Walbert Timothy P C/O XOMA CORPORATION 2910 SEVENTH STREET BERKELEY CA 94710 1 0 0 0 Common Shares 2016-07-21 4 A 0 48246.0 0.0 A 129314 D Non-Qualified Share Option (right to buy) 0.5599 2016-07-21 4 A 0 60532.0 0.0 A 2026-07-21 Common Shares 60532 60532 D These shares were acquired pursuant to a grant of restricted stock units under the Amended and Restated XOMA Corporation 2010 Long Term Incentive and Stock Award Plan and are scheduled to vest in full one year after the grant date. This option is exercisable in twelve equal monthly installments, beginning one month from the vest start date, which is the same as the grant date. By: Diane Wilcock For: Timothy P. Walbert 2016-08-02