X0201 4 2003-10-29 0 0000797468 OCCIDENTAL PETROLEUM CORP /DE/ OXY 0001026546 HALLOCK RICHARD W C/O OCCIDENTAL PETROLEUM CORP 10889 WILSHIRE BLVD LOS ANGELES CA 90024 0 1 0 0 EVP - Human Resources Common Stock 2003-10-29 4 M 0 4102 24.375 A 129264 D Common Stock 2003-10-29 4 F 0 2789 35.85 D 126475 D Common Stock 2003-10-29 4 M 0 3940 25.375 A 130415 D Common Stock 2003-10-29 4 F 0 2788 35.85 D 127627 D Common Stock 2003-10-29 4 M 0 3849 26 A 131476 D Common Stock 2003-10-29 4 F 0 2791 35.85 D 128685 D Common Stock 2003-10-29 4 M 0 4980 20.0625 A 133665 D Common Stock 2003-10-29 4 F 0 2786 35.85 D 130879 D Common Stock 2003-10-31 4 S 0 2 35.02 D 130877 D Common Stock 2866 I by limited partnership Employee stock option (right to buy) 24.375 2003-10-29 4 M 0 4102 0 D 2006-07-10 Common Stock 4102 35898 D Employee stock option (right to buy) 25.375 2003-10-29 4 M 0 3940 0 D 2007-07-02 Common Stock 3940 46060 D Employee stock option (right to buy) 26 2003-10-29 4 M 0 3849 0 D 2008-07-08 Common Stock 3849 76151 D Employee stock option (right to buy) 20.0625 2003-10-29 4 M 0 4980 0 D 2010-07-19 Common Stock 4980 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 Richard W. Hallock 2003-10-31