X0202 4 2007-12-13 0 0001123647 ATP OIL & GAS CORP ATPG 0001167541 BULMAHN T PAUL 4600 POST OAK PLACE SUITE 200 HOUSTON TX 77027 1 1 1 0 President Common Stock 2007-12-13 4 S 0 450000 45.355 D 6580474 D These shares were sold pursuant to the terms of ATP Oil & Gas Corporation's recent public offering. The underwriters of that offering have exercised, in part, their option to purchase 450,000 shares of ATP's common stock from Chairman and President, T. Paul Bulmahn. See the ATP Oil & Gas Corporation press release of December 13, 2007 for additional information. T. Paul Bulmahn 2007-12-13