X0303 4 2011-01-06 0 0001123647 ATP OIL & GAS CORP ATPG 0001244743 BRISACK CHRIS A 4600 POST OAK PLACE SUITE 200 HOUSTON TX 77027 1 0 0 0 Common Stock 2011-01-06 4 S 0 1800 17.18 D 24117 D As of 01/06/11, 12,540 shares are restricted and 11,577 shares are unrestricted Chris A. Brisack 2011-01-10