SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                                 --------------

                                    FORM 8-K

                                 CURRENT REPORT


                     PURSUANT TO SECTION 13 or 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934



       Date of Report (Date of earliest event reported) - October 23, 2001
                                ----------------



                           ACACIA RESEARCH CORPORATION
                           ---------------------------
             (Exact name of Registrant as specified in its Charter)




    Delaware                            000-26068               95-4405754
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(State or Other Jurisdiction           (Commission           (I.R.S. Employer
of Incorporation or Organization)      File Number)          Identification No.)



55 South Lake Avenue, Pasadena, California                             91101
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(Address of Principal Executive Offices)                              (Zip Code)



       Registrant's telephone number, including area code: (626) 396-8300
                                                           --------------



                                 Not Applicable
                   ------------------------------------------
          (Former Name or Former Address, if Changed since Last Report









Item 7.  Exhibits.

          (a)      Not Applicable.

          (b)      Not Applicable.

          (c)      Exhibits.

                   Exhibit 99.1

                   Press Release dated October 23, 2001 of the Registrant.



Item 9.  Registration FD Disclosure.

         On October 23, 2001, Acacia Research Corporation issued a press
release, a copy of which is attached hereto as Exhibit 99.1 and is incorporated
herein by reference.









                                   SIGNATURES


     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned, hereunto duly authorized.



                                     ACACIA RESEARCH CORPORATION


Date:  October 26, 2001              By:   /s/  Paul R. Ryan
                                       -----------------------------------------
                                       Name:  Paul R. Ryan
                                       Title: Chairman and Chief Executive
                                                Officer






                                  EXHIBIT INDEX



 Exhibit Number                         Description
 --------------                         -----------
    99.1                Press Release dated October 23, 2001, of the Registrant.