X0201 4 2003-08-19 0 0000797468 OCCIDENTAL PETROLEUM CORP /DE/ OXY 0001026545 CHAZEN STEPHEN I OCCIDENTAL PETROLEUM CORPORATION 10889 WILSHIRE BOULEVARD LOS ANGELES CA 90024 0 1 0 0 CFO & EVP - Corp. Development Common Stock 2003-08-19 4 M 0 4102 24.375 A 142624 D Common Stock 2003-08-19 4 M 0 3940 25.375 A 146564 D Common Stock 2003-08-19 4 M 0 3849 26 A 150413 D Common Stock 2003-08-19 4 M 0 1660 20.0625 A 152073 D Employee stock option (right to buy) 24.375 2003-08-19 4 M 0 4102 0 D 2006-07-10 Common Stock 4102 35898 D Employee stock option (right to buy) 25.375 2003-08-19 4 M 0 3940 0 D 2007-07-02 Common Stock 3940 56060 D Employee stock option (right to buy) 26 2003-08-19 4 M 0 3849 0 D 2008-07-08 Common Stock 3849 96151 D Employee stock option (right to buy) 20.0625 2003-08-19 4 M 0 1660 0 D 2010-07-19 Common Stock 1660 0 D The option vested in three equal annual installments beginning on July 10, 1997. The option vested in three equal annual installments beginning on July 2, 1998. The option vested in three equal annual installments beginning on July 8, 1999. The option vested in three equal annual installments beginning on July 19, 2001. /s/ CHRISTEL H. PAULI, Attorney-in-Fact for Stephen I. Chazen 2003-08-21