SEC Form 3

FORM 3

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

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1. Name and Address of Reporting Person* BURNS THOMAS M. (Last) (First) (Middle) C/O XOMA CORPORATION 2910 SEVENTH STREET (Street) BERKELEY CA 94710 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 04/03/2015	3. Issuer Name and Ticker or Trading Symbol XOMA Corp [ XOMA ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) Chief Financial Officer	5. If Amendment, Date of 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

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Shares	93,760(1)	D
Common Shares	6,947	I	by 401(k)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Incentive Share Option (right to buy)	01/07/2013	01/07/2021	Common Shares	7,460	$5.83	D
Incentive Share Option (right to buy)	03/01/2014	03/01/2020	Common Shares	5,333	$7.35	D
Incentive Share Option (right to buy)	12/26/2011	02/26/2019	Common Shares	2,400	$8.4	D
Incentive Share Option (right to buy)	12/08/2008	12/08/2018	Common Shares	666	$16.05	D
Incentive Share Option (right to buy)	08/14/2010	08/14/2016	Common Shares	933	$25.2	D
Incentive Share Option (right to buy)	02/21/2012	02/21/2018	Common Shares	1,666	$40.65	D
Incentive Share Option (right to buy)	02/21/2011	02/21/2017	Common Shares	800	$50.85	D
Incentive Share Option (right to buy)	10/31/2011	10/31/2017	Common Shares	633	$55.05	D
Non-Qualified Share Option (right to buy)	(2)	02/09/2022	Common Shares	16,000	$1.59	D
Non-Qualified Share Option (right to buy)	(3)	02/28/2023	Common Shares	8,700	$2.715	D
Non-Qualified Share Option (right to buy)	(4)	04/03/2025	Common Shares	5,000	$3.5	D
Non-Qualified Share Option (right to buy)	(5)	02/26/2025	Common Shares	30,740	$3.83	D
Non-Qualified Share Option (right to buy)	(6)	06/16/2024	Common Shares	87,000	$4.66	D
Non-Qualified Share Option (right to buy)	(7)	02/27/2024	Common Shares	13,050	$8.91	D

Explanation of Responses:

1. Represents shares directly owned by Mr. Burns as of April 3, 2015, the date on which Mr. Burns became a reporting person. These shares consist of (1) 93,760 shares underlying restricted stock units awarded to Mr. Burns through April 3, 2015; and (2) 6,947 shares held directly under the XOMA Ltd. Deferred Savings Plan.

2. Exercisable with respect to 1/48th of options in monthly increments beginning March 09, 2012 and ending February 9, 2016.

3. Exercisable with respect to 1/48th of options in monthly increments beginning 3/28/2013 and ending 2/28/2017.

4. Exercisable with respect to 1/48th of options in monthly increments beginning May 3, 2015 and ending April 3, 2019.

5. Exercisable with respect to 1/48th of options in monthly increments beginning March 26, 2015 and ending February 26, 2018.

6. Exercisable as to (a) 25% of the option shares upon the first anniversary of the date of grant, and (b) the remaining 75% of the option shares in thirty-six (36) equal and consecutive monthly installments beginning one year and one month after the date of grant.

7. Exercisable with respect to 1/48th of options in monthly increments beginning March 27, 2014 and ending February 27, 2018.

	Russell J. Wood	04/07/2015
	** Signature of Reporting Person	Date
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