X0202 4 2004-06-09 0000891456 PLAINS EXPLORATION & PRODUCTION CO PXP 0001191056 GLADNEY THOMAS M 700 MILAM SUITE 3100 HOUSTON TX 77002 0 1 0 0 EVP-Exploration & Development Common Stock 2004-06-09 4 A 0 250000 0 A 315600 D Common Stock 1988-08-08 4 J 0 0 0 A 709.678 I By 401(k) plan. Represents a grant of Restricted Stock Units from the PXP 2004 Stock Incentive Plan, as amended, vesting on the earlier of May 16, 2009 or the date the closing price per share equals or exceeds $37.92 on any ten out of twenty consecutive trading days on the NYSE or other exchange or market on which the shares primarily trade. The transaction date is inapplicable due to the reporting person's indirectly held shares. The transaction code is inapplicable due to the reporting person's indirectly held shares. The shares represented are inapplicable due to the reporting person's indirect holding of these shares. The price represented is inapplicable due to SEC reporting requirements to list all class of shares. Deborah R. Anderson, attorney-in-fact for Thomas M. Gladney 2004-06-09