Mariner Energy to Offer 10MM Shares of Common Stock

Mariner Energy intends to offer, subject to market and other conditions, 10 million shares of its common stock and $250 million in aggregate principal amount of its senior notes due 2016 through concurrent underwritten public offerings. Mariner expects to grant the underwriters a 30-day option, solely to cover over-allotments, to purchase up to an additional 1.5 million shares of its common stock.

Net proceeds from the offerings are expected to be used to repay debt under Mariner's secured bank credit facility and for general corporate purposes. Mariner cannot provide assurance regarding the amount of senior notes to be issued, if any, until the senior notes offering has been completed.