X0306 4 2014-02-27 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 2014-02-27 4 A 0 43448 0 A 43448 D Common Shares 1659 I by 401(k) Non-Qualified Share Option (right to buy) 8.91 2014-02-27 4 A 0 60000 8.91 A 2024-02-27 Common Shares 60000 60000 D These shares were acquired pursuant to a grant of restricted stock units on February 27, 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, 2015, March 18, 2016, and March 18, 2017. Exercisable with respect to 1/48th of options in monthly increments beginning March 27, 2014 and ending February 27, 2018. By: Russell J. Wood For: Thomas Klein 2014-03-03