X0303 4 2010-04-18 0 0001022345 MARINER ENERGY INC ME 0001442478 MOORE KENNETH E JR ONE BRIARLAKE PLAZA, SUITE 2000 2000 WEST SAM HOUSTON PARKWAY SOUTH HOUSTON TX 77042 0 1 0 0 VP-Onshore Land Common Stock 2010-04-18 4 F 0 850 D 72318 D Employee Stock Option (right to buy) 14 2006-03-02 2015-03-11 Common Stock 8000 8000 D On April 18, 2010, 2,333 shares of the issuer's common stock granted to the reporting person under the issuer's Stock Incentive Plan, as amended or restated from time to time (the "Plan"), vested. To satisfy withholding tax obligations in connection with the vesting, the issuer withheld the shares this Form reports were disposed. In accordance with the Plan, the number of shares withheld was determined by reference to the closing price per share of the issuer's common stock on the New York Stock Exchange on April 16, 2010 of $25.45. Kenneth E. Moore, Jr. by Teresa G. Bushman pursuant to Power of Attorney dated August 7, 2008 (previously filed as Exhibit 24 to Mr. Moore's Form 3 filed on August 12, 2008) 2010-04-19