X0306 4 2013-11-13 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 2013-11-13 4 M 0 6876 0 A 16902 D Common Shares 20 I by IRA Common Shares 10 I by Spouse Common Shares 2600 I by Trust Restricted Stock Units 0 2013-11-13 4 M 0 6876 0 D Common Shares 6876 6875 D These restricted stock units were granted on October 27, 2011 and are scheduled to vest in substantially equal installments on each of November 13, 2012, November 13, 2013 and November 14, 2014. Each restricted stock unit represents the right to receive, upon vesting, one share of common stock. This nondiscretionary transaction represents the vesting of restricted stock units as 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. By: Russell J. Wood For: W. Denman Van Ness 2013-11-15