NEWPORT BEACH, Calif.--(BUSINESS WIRE)--Sept. 16, 2005--Acacia Research Corporation (Nasdaq:CBMX)(Nasdaq:ACTG) today announced that it has obtained commitments to purchase approximately $10.5 million of its Acacia Research-CombiMatrix common stock in a registered direct offering. Under the terms of the transaction, Acacia will sell approximately 6.4 million shares of its Acacia Research-CombiMatrix common stock at $1.65 per share to a select group of accredited investors and grant to such investors five year warrants for the purchase of an aggregate of approximately 1.6 million shares of common stock at an exercise price of $2.40 per share. Piper Jaffray & Co. acted as exclusive placement agent for the transaction.