X0202 4 2004-06-23 0 0000716039 UNOCAL CORP UCL 0001183513 CECIL JOE D UNOCAL CORPORATION 2141 ROSECRANS AVE, SUITE 4000 EL SEGUNDO CA 90245 0 1 0 0 VP & Comptroller Common Stock $1.00 Par Value 2004-06-23 4 M 0 1805. 32.8125 A 7540. D Common Stock $1.00 Par Value 2004-06-23 4 M 0 9526. 28.3438 A 17066. D Common Stock $1.00 Par Value 2004-06-23 4 M 0 6373. 27.07 A 23439. D Common Stock $1.00 Par Value 2004-06-23 4 S 0 17704. 38.00 D 5735. D Common Stock $1.00 Par Value 2004-06-23 4 M 0 249. 0.00 A 5984. D Common Stock $1.00 Par Value 6822. I By Family Trust Common Stock $1.00 Par Value 9381.821 I Unocal Savings Plan Option (Right to Buy) 32.8125 2004-06-23 4 M 0 3610. 0.00 D 1996-09-25 2006-03-25 Common Stock $1.00 Par Value 3610. 0. D Option (Right to Buy) 28.3438 2004-06-23 4 M 0 9526. 0.00 D 2000-08-04 2010-02-04 Common Stock $1.00 Par Value 9526. 0. D Option (Right to Buy) 27.07 2004-06-23 4 M 0 6373. 0.00 D 2003-08-11 2013-02-11 Common Stock $1.00 Par Value 6373. 6372. 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. Transaction pursuant to a 10b5-1 trading plan adopted on May 27, 2004. Upon exercise of an employee nonqualifed stock option covering 3,610 shares at the exercise price of $32.8125 per share, 1,805 shares of unrestricted stock were purchased at the exercise price, and 249 shares of restricted stock were received and not resold. The restricted stock is equal in value to the appreciation on 1,850 shares at the fair market value of $38.075 per share. The option became exercisable in four equal installments on 9/25/96, 3/25/97, 3/25/98 and 3/25/99. The option became exercisable in four equal installments on 8/4/2000, 2/4/2001, 2/4/2002 and 2/4/2003. The option became 50% exercisable in two equal installments on 8/11/2003 and 2/11/2004, and the remaining 50% becomes exercisable in two equal installments on 2/11/2005 and 2/11/2006. Joe Cecil 2004-06-23