X0306 4 2016-05-28 0 0000791908 XOMA Corp XOMA 0001221676 VAN NESS W DENMAN C/O XOMA CORPORATION 2910 SEVENTH STREET BERKELEY CA 94710 1 0 0 0 Common Shares 2016-05-28 4 M 0 3150.0 0.0 A 91350 D Common Shares 20 I by IRA Common Shares 10 I by Spouse Common Shares 2600 I by Trust Restricted Stock Units 0.0 2016-05-28 4 M 0 3150.0 0.0 D 2013-05-28 Common Shares 3150 0 D Each restricted stock unit represents the right to receive, at settlement, one share of common stock. This nondiscretionary transaction represents the settlement of vested restricted stock units in shares of common stock. Owned directly through W. D. Van Ness IRA. Held indirectly through the C. Van Ness IRA. Shares owned directly by The Van Ness 1983 Revocable Trust. These restricted stock units are scheduled to vest in substantially equal installments annually over three years, with the first installment vesting on May 28, 2014. By: Diane Wilcock For: W. Denman Van Ness 2016-05-31