2009-11-09 12:21:04 -

Acacia Research Corporation (Nasdaq:ACTG) announced today that its Optimum Processing Solutions LLC (OPS) subsidiary has entered into a settlement agreement with International Business Machines Corporation (IBM). This agreement resolves all claims between OPS and IBM arising out of the patent litigation captioned Optimum Processing Solutions, LLC v. Advanced Micro Devices, Inc., et al., Civil Action Case No.

1:09-cv-1098, pending in

the United States District Court for the Northern District of Georgia.


ABOUT ACACIA RESEARCH CORPORATION

Acacia Research’s subsidiaries develop, acquire, and license patented technologies. Acacia Research’s subsidiaries control over 125 patent portfolios, covering technologies used in a wide variety of industries.

Information about Acacia Research is available at www.acaciatechnologies.com : and www.acaciaresearch.com : .

Safe Harbor Statement under the Private Securities Litigation Reform Act of 1995


This news release contains forward-looking statements within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995. These statements are based upon our current expectations and speak only as of the date hereof. Our actual results may differ materially and adversely from those expressed in any forward-looking statements as a result of various factors and uncertainties, including the recent economic slowdown affecting technology companies, the ability to successfully develop licensing programs and attract new business, rapid technological change in relevant markets, changes in demand for current and future intellectual property rights, legislative, regulatory and competitive developments addressing licensing and enforcement of patents and/or intellectual property in general, and general economic conditions. Our Annual Report on Form 10-K, recent and forthcoming Quarterly Reports on Form 10-Q, recent Current Reports on Forms 8-K and 8-K/A, and other SEC filings discuss some of the important risk factors that may affect our business, results of operations and financial condition. We undertake no obligation to revise or update publicly any forward-looking statements for any reason.

Acacia Research CorporationRob Stewart, Investor RelationsTel:

949-480-8300Fax: 949-480-8301