X0201 4 2003-11-07 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 2003-11-07 4 M 0 25676 23.125 A 156553 D Common Stock 2003-11-07 4 S 0 25676 36.05 D 130877 D Common Stock 2003-11-07 4 M 0 35898 24.375 A 166775 D Common Stock 2003-11-07 4 S 0 35898 36.1012 D 130877 D Common Stock 2003-11-10 4 S 0 566 36.07 D 2300 I by limited partnership Common Stock 2003-11-10 4 S 0 900 36.07 D 1400 I by limited partnership Common Stock 2003-11-10 4 S 0 1400 36.06 D 0 I by limited partnership Employee stock option (right to buy) 23.125 2003-11-07 4 M 0 25676 0 D 2005-05-27 Common Stock 25676 0 D Employee stock option (right to buy) 24.375 2003-11-07 4 M 0 35898 0 D 2006-07-10 Common Stock 35898 0 D The option vested in three equal annual installments beginning on April 27, 1996. The option vested in three equal annual installments beginning on July 10, 1997. /s/ CHRISTEL H. PAULI, Attorney-in-Fact for Richard W. Hallock 2003-11-10