Ownership Submission
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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(Print or Type Responses)
1. Name and Address of Reporting Person *
AKIN THOMAS B
  2. Issuer Name and Ticker or Trading Symbol
ACACIA RESEARCH CORP [ACTG/CBMX]
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)
500 NEWPORT CENTER DRIVE, 7TH FLOOR
3. Date of Earliest Transaction (Month/Day/Year)
05/04/2007
(Street)

NEWPORT BEACH, CA 92660
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
Acacia Research - CombiMatrix Common Stock 05/04/2007   P   1,400,000 A (2) 1,434,184 I See footnote (3)
Acacia Research - CombiMatrix Common Stock 05/04/2007   P   700,000 A (1) 701,228 D  

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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
Acacia Research - CombiMatrix Warrants (right to buy) $ 0.55 05/04/2007   P   1,050,000   05/04/2007 05/04/2012 Acacia Research - CombiMatrix Common Stock 1,050,000 (1) 1,050,000 D  
Acacia Research - CombiMatrix Warrants (right to buy) $ 0.55 05/04/2007   P   2,100,000   05/04/2007 05/04/2012 Acacia Research - CombiMatrix Common Stock 2,100,000 (2) 2,100,000 I See Footnote (3)

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
AKIN THOMAS B
500 NEWPORT CENTER DRIVE
7TH FLOOR
NEWPORT BEACH, CA 92660
  X      

Signatures

 Thomas B. Akin   05/08/2007
**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) The reported securites are included within 700,000 Acacia Research - CombiMatrix (CBMX) Units purchased by the reporting person for $0.738 per unit, for a total of $516,250. Each Unit consists of one share of CBMX common stock and 1.5 warrants to purchase 1,050,000 shares of CBMX common stock.
(2) The reported securites are included within 1,400,000 Acacia Research - CombiMatrix (CBMX) Units purchased by the reporting person for $0.738 per unit, for a total of $1,032,500. Each Unit consists of one share of CBMX common stock and 1.5 warrants to purchase 2,100,000 shares of CBMX common stock.
(3) Held by Talkot Fund, L.P. Mr. Akin serves as managing general partner of Talkot Fund, L.P. Mr. Akin disclaims beneficial ownership in the shares held by Talkot Fund, L.P. except to the extent of his pecuniary interest therein.

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