EXHIBIT 31.5
CERTIFICATION OF THE PRINCIPAL EXECUTIVE OFFICER PURSUANT TO
SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 (18 U.S.C. SECTION 350)
I, Marc W. Booth, certify that:
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| 1. | I have reviewed this Amendment No. 1 to the Annual Report on Form 10-K of Acacia Research Corporation; and |
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| 2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; |
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| Dated: | April 30, 2019 | /s/ Marc W. Booth |
| | | Marc W. Booth |
| | | Chief Intellectual Property Officer
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