X0306 4 2015-02-26 0 0000791908 XOMA Corp XOMA 0001572521 Klein Thomas C/O XOMA CORPORATION 2910 SEVENTH STREET BERKELEY CA 94710 0 1 0 0 Chief Commercial Officer Common Shares 2015-02-26 4 A 0 64900.0 0.0 A 158050 D Common Shares 4660 I by 401(k) Non-Qualified Share Option (right to buy) 3.83 2015-02-26 4 A 0 86910.0 3.83 A 2025-02-26 Common Shares 86910 86910 D These shares were acquired pursuant to a grant of restricted stock units on February 26, 2014 under the Amended and Restated XOMA Corporation 2010 Long Term Incentive and Stock Award Plan and are scheduled to vest in substantially equal installments on each of March 18, 2016, March 18, 2017, and March 18, 2018. Exercisable with respect to 1/48th of options in monthly increments beginning March 26, 2015 and ending February 26, 2018. By: Russell J. Wood For: Thomas Klein 2015-03-02