X0201 4 2004-02-18 0000891456 PLAINS EXPLORATION & PRODUCTION CO PXP 0000939485 FLORES JAMES C 700 MILAM SUITE 3100 HOUSTON TX 77002 1 1 0 0 Chairman & CEO Common Stock 2004-02-18 4 A 0 70000 0 A 229965 D Common Stock 1988-08-08 4 J 0 0 0 A 224.56 I By 401(k) plan. Common Stock 1988-08-08 4 J 0 0 0 A 1000000 I By Sable Management, L.P. Represents a grant of Restricted Stock Units with one-third of the units vesting February 18, 2005, one-third vesting February 18, 2006 and one-third vesting February 18, 2007. The date represented is inapplicable due to the reporting person's indirectly held shares through the company's 401(k) plan. The transaction code represented is inapplicable due to the reporting person's indirectly held shares through the Company's 401(k) plan. The units represented are inapplicable due to the reporting person's indirectly held shares through the company's 401(k) plan. The price represented is inapplicable due to the reporting person's indirectly held shares through the company's 401(k) plan. The information in this report is based on a plan statement dated as of December 31, 2003. The date represented is not applicable due to the reporting person's indirectly held shares through Sable Management, L.P. The transaction code represented is inapplicable due to the reporting person's indirectly held shares through Sable Management, L.P. The shares represented are inapplicable due to the reporting person's indirectly held shares through Sable Management, L.P. The price represented is inapplicable due to the reporting person's indirectly held shares through Sable Management, L.P. Deborah R. Anderson, attorney-in-fact for James C. Flores 2004-02-19