Robbins Umeda LLP has commenced an investigation into possible breaches of fiduciary duty and other violations of state law by members of the Board of Directors of Mariner Energy, Inc. ("Mariner Energy") (NYSE: ME) in connection with their actions in causing Mariner Energy to enter into a merger agreement with Apache Corporation ("Apache") (NYSE: APA) (NASDAQ: APA). If the transaction is completed, Mariner Energy shareholders will receive $7.80 in cash and 0.17043 of a share of Apache common stock for each share of Mariner Energy they own, subject to an election feature and proration. The companies expect the merger to close in the third quarter of 2010.

Robbins Umeda LLP's investigation concerns whether Mariner Energy's Board of Directors undertook a fair process to obtain fair consideration for all shareholders of Mariner Energy.

If you are a shareholder of Mariner Energy and would like more information about your rights as a shareholder, please contact attorney Lauren Levi at 800-350-6003 or by e-mail at

Robbins Umeda LLP is a California-based law firm with significant experience representing investors in merger-related shareholder class actions, shareholder derivative actions, and securities fraud class actions. For more information about the firm, please go to


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