FORM 3
        
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

BURNS THOMAS M.

2. Date of Event Requiring Statement (MM/DD/YYYY)
4/3/2015 

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 /

(Street)

BERKELEY, CA 94710       

(City)              (State)              (Zip)
5. If Amendment, Date Original Filed (MM/DD/YYYY)

 

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   93760   (1) D    
Common Shares   6947   I   by 401(k)  

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 4) 		2. Date Exercisable and Expiration Date
(MM/DD/YYYY) 		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)   1/7/2013   1/7/2021   Common Shares   7460   $5.83   D    
Incentive Share Option (right to buy)   3/1/2014   3/1/2020   Common Shares   5333   $7.35   D    
Incentive Share Option (right to buy)   12/26/2011   2/26/2019   Common Shares   2400   $8.4   D    
Incentive Share Option (right to buy)   12/8/2008   12/8/2018   Common Shares   666   $16.05   D    
Incentive Share Option (right to buy)   8/14/2010   8/14/2016   Common Shares   933   $25.2   D    
Incentive Share Option (right to buy)   2/21/2012   2/21/2018   Common Shares   1666   $40.65   D    
Incentive Share Option (right to buy)   2/21/2011   2/21/2017   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) 2/9/2022   Common Shares   16000   $1.59   D    
Non-Qualified Share Option (right to buy)     (3) 2/28/2023   Common Shares   8700   $2.715   D    
Non-Qualified Share Option (right to buy)     (4) 4/3/2025   Common Shares   5000   $3.5   D    
Non-Qualified Share Option (right to buy)     (5) 2/26/2025   Common Shares   30740   $3.83   D    
Non-Qualified Share Option (right to buy)     (6) 6/16/2024   Common Shares   87000   $4.66   D    
Non-Qualified Share Option (right to buy)     (7) 2/27/2024   Common Shares   13050   $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.

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 4/7/2015
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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