X0201 4 2003-07-07 0 0000891456 PLAINS EXPLORATION & PRODUCTION CO PXP 0001083297 ENCAP INVESTMENTS LLC 1100 LOUISIANA SUITE 3150 HOUSTON TX 77002 0 0 1 0 Common Stock 2003-07-07 4 J 0 587 10.81 A 4263993 I by affiliates Common Stock 2003-09-09 4 J 0 238 12.60 A 4263993 I by affiliates Represents shares granted to EnCap Energy Capital Fund III, L.P. as compensation for Robert L. Zorich serving on the Issuer's board of directors. Represents 2,139,790 shares held by EnCap Energy Capital Fund III, L.P., 593,849 shares held by EnCap Energy Capital Fund III-B, L.P., 1,011,098 shares held by EnCap Energy Acquisition III-B, Inc., and 519,256 shares held by BOCP Energy Parnters, L.P. by: EnCap Investments L.P., Manager of EnCap Investments L.L.C., by EnCap Investments GP, L.L.C., General Partner of EnCap Investments L.P., by /s/ Robert L. Zorich, Senior Managing Director 2003-09-11