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 * Tobia Alfred Victor Jr.   2. Issuer Name and Ticker or Trading Symbol ACACIA RESEARCH CORP [ACTG] 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) 767 3RD AVENUE, 15TH FLOOR 3. Date of Earliest Transaction (Month/Day/Year) 12/07/2018 (Street) NEW YORK, NY 10017 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 Stock 12/07/2018   P   2,103 A $ 3.0022 245,631 I By Sidus Investment Management, LLC (1) Common Stock               183,303 I By Sidus Investment Partners, L.P. (2) Common Stock 12/07/2018   P   5,223 A $ 3.0022 528,986 I By Sidus Double Alpha Fund, L.P. (3) Common Stock 12/07/2018   P   2,328 A $ 3.0022 242,080 I By Sidus Double Alpha Fund, Ltd. (4)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Tobia Alfred Victor Jr. 767 3RD AVENUE 15TH FLOOR NEW YORK, NY 10017	X

Signatures

Alfred Victor Tobia Jr.		02/13/2019
**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)	Shares of common stock held in an account for which Sidus Investment Management, LLC ("Sidus Management") serves as a sub-advisor (the "Managed Account"). The Reporting Person, solely by virtue of his position as a managing member of Sidus Management, the sub-advisor to the Managed Account, may be deemed to beneficially own the shares of common stock directly held in the Managed Account for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"). The Reporting Person expressly disclaims beneficial ownership of such shares of common stock except to the extent of his pecuniary interest therein.
(2)	Shares of common stock owned directly by Sidus Investment Partners, L.P. ("Sidus Partners"). The Reporting Person, solely by virtue of his position as a managing member of Sidus Management, the investment manager of Sidus Partners, may be deemed to beneficially own the shares of common stock directly held by Sidus Partners for purposes of Section 16. The Reporting Person expressly disclaims beneficial ownership of such shares of common stock except to the extent of his pecuniary interest therein.
(3)	Shares of common stock owned directly by Sidus Double Alpha Fund, L.P. ("Sidus Double Alpha"). The Reporting Person, solely by virtue of his position as a managing member of Sidus Management, the investment manager of Sidus Double Alpha, may be deemed to beneficially own the shares of common stock directly held by Sidus Double Alpha for purposes of Section 16. The Reporting Person expressly disclaims beneficial ownership of such shares of common stock except to the extent of his pecuniary interest therein.
(4)	Shares of common stock owned directly by Sidus Double Alpha Fund, Ltd. ("Sidus Double Alpha Offshore"). The Reporting Person, solely by virtue of his position as a managing member of Sidus Management, the investment manager of Sidus Double Alpha Offshore, may be deemed to beneficially own the shares of common stock directly held by Sidus Double Alpha Offshore for purposes of Section 16. The Reporting Person expressly disclaims beneficial ownership of such shares of common stock except to the extent of his pecuniary interest therein.

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