FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * VAN NESS W DENMAN   2. Issuer Name and Ticker or Trading Symbol XOMA Corp [XOMA] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O XOMA CORPORATION, 2910 SEVENTH STREET 3. Date of Earliest Transaction (Month/Day/Year) 05/21/2015 (Street) BERKELEY, CA 94710 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Shares 05/21/2015   A   36,873 (1) A $ 0 81,900 D   Common Shares               20 I by IRA (2) Common Shares               10 I by Spouse (3) Common Shares               2,600 I by Trust (4)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Non-Qualified Share Option (right to buy)

$ 3.39

05/21/2015

A

36,873

(5)

05/21/2025

Common Shares

36,873

$ 3.39

36,873

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
VAN NESS W DENMAN C/O XOMA CORPORATION 2910 SEVENTH STREET BERKELEY, CA 94710	X

Signatures

By: Russell J. Wood For: W. Denman Van Ness		05/22/2015
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	These shares were acquired pursuant to a grant of restricted stock units on May 21, 2015, 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 May 28, 2016, May 28, 2017, and May 28, 2018.
(2)	Owned directly through W. D. Van Ness IRA.
(3)	Held indirectly through the C. Van Ness IRA.
(4)	Shares owned directly by The Van Ness 1983 Revocable Trust.
(5)	Exercisable with respect to 1/12th of options in monthly increments beginning June 21, 2015 and ending May 21, 2016.

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