X0202 4 2005-03-31 0 0000716039 UNOCAL CORP UCL 0001017985 MCCORMICK RICHARD D C/O UNOCAL CORPORATION 2141 ROSECRANS AVENUE, SUITE 4000 EL SEGUNDO CA 90245 1 0 0 0 Common Stock / $1.00 Par Value 2005-03-31 4 A 0 673.9866 52.5233 A 8278.1683 D Common Stock / $1.00 Par Value 2005-03-31 4 A 0 17.5318 52.5233 A 8295.7001 D Common Stock has attached Preferred Stock Purchase Rights. If and when the Rights become exercisable, the holders would initially be entitled to purchase one one-hundredth of a share of Series B Junior Participating Preferred stock at a purchase price determined pursuant to the Rights Agreement. Stock Units credited for voluntary deferral of director fees under the 2004 Directors' Deferred Compensation and Restricted Stock Unit Award Plan. Dividend equivalent credited as Stock Units under the 2004 Directors' Deferred Compensation and Restricted Stock Unit Award Plan. Paul R. Moore, Asst Secretary, Attorney-In-Fact 2005-04-01