Ownership Submission
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, 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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(Print or Type Responses)
1. Name and Address of Reporting Person *
  BURNS THOMAS M.
 2. Date of Event Requiring Statement (Month/Day/Year)
04/03/2015		 3. Issuer Name and Ticker or Trading Symbol
XOMA Corp [XOMA]
(Last)
(First)
(Middle)
C/O XOMA CORPORATION, 2910 SEVENTH STREET		 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 Original Filed(Month/Day/Year)
(Street)

BERKELEY, CA 94710		 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 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)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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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 of Derivative Security: 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  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
BURNS THOMAS M.
C/O XOMA CORPORATION
2910 SEVENTH STREET
BERKELEY, CA 94710		       Chief Financial Officer  

Signatures

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

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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) 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.

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