X0201 4 2004-02-10 0 0000716039 UNOCAL CORP UCL 0001183513 CECIL JOE D UNOCAL CORPORATION 2141 ROSECRANS AVE, SUITE 4000 EL SEGUNDO CA 90245 0 1 0 0 Comptroller & VP Common Stock $1.00 Par Value 2004-02-10 4 A 0 3318. 0.00 A 7173. D Common Stock $1.00 Par Value 5900. I By Family Trust Common Stock $1.00 Par Value 9232.393 I Unocal Savings Plan Stock Option (Right to Buy) 36.869 2004-02-10 4 A 0 6748. 0.00 A 2005-02-10 2014-02-10 Common Stock $1.00 Par Value 6748. 6748. 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. The stock option becomes exercisable in three equal annual installments on 2-10-2005, 2-10-2006 and 2-10-2007. Paul R. Moore, Attorney-in-fact 2004-02-12