Sigma Designs completed its previously-announced acquisition of CopperGate Communications. Under the deal, which was first announced in October, Sigma has acquired all of the outstanding share capital of CopperGate for a cash payment of approximately $116 million and the issuance to CopperGate shareholders of an aggregate of approximately 3.9 million shares of Sigma common stock. Under the terms of the acquisition agreement, Sigma also assumed outstanding unvested options held by CopperGate employees and agreed to make an additional cash payment...