X0101 4 2003-06-27 0 0001123647 ATP OIL & GAS CORP atpg 0001167540 SCHLIEF GERALD W 0 0 1 0 Sr. Vice President Common Stock 2003-06-27 4 S 0 65000 6.1379 D 3190433 D Common Stock 2003-06-30 4 S 0 35000 6.1446 D 3155433 D Gerald W. Schlief 2003-06-30