FORM 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP
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  OMB Number: 3235-0287
  Expires: January 31, 2005
[  ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility
Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
  Estimated average burden
  hours per response....   0.5
                 
(Print or Type Responses)
1. Name and Address of Reporting Person* 2. Issuer Name and Ticker or Trading Symbol 6. Relationship of Reporting Person(s) to Issuer
              (Check all applicable)
de Brier, Donald P. Occidental Petroleum Corporation    
OXY            Director            10% Owner
(Last)                                (First)                          (Middle)
  X       Officer (give title            Other (specify
Occidental Petroleum Corporation 3. I.R.S. Identification Number 4. Statement for Month/Day/Year                  below)                below)
10889 Wilshire Boulevard of Reporting Person, if an
entity (voluntary) 04/30/2003 Executive Vice President,
                                          (Street)
General Counsel and Secretary
5. If Amendment, Date of Original
Los Angeles, California 90024 (Month/Year)
7. Individual or Joint/Group Filing (Check Applicable Line)
       (City)                               (State)                           (Zip)   X       Form filed by One Reporting Person
           Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security 2. Transaction 2a. Deemed 3. Transaction Code 4. Securities Acquired (A) or 5. Amount of 6. Ownership 7. Nature of
(Instr. 3) Date Execution Disposed of (D) Securities Form: Indirect
Date, if any (Instr. 8) Beneficially Direct (D) or Beneficial
(Month/Day/ (Instr. 3, 4 and 5) Owned at End Indirect (I) Ownership
Year) (Month/Day/
of Month
Year) Code V Amount (A) or (D) Price (Instr. 3 and 4) (Instr. 4) (Instr. 4)
Common Stock     04/30/2003      M 150,000 A $20.5000 D
Common Stock     04/30/2003      S 150,000 D $29.7603 D
Common Stock     04/30/2003      M 63,280 A $14.8750 D
Common Stock     04/30/2003      S 63,280 D $29.7603 D
Common Stock     04/30/2003      M 14,367 A $17.7500 D
Common Stock     04/30/2003      S 14,367 D $29.7603 88,715 D
         
         
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
 

 

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FORM 4 (continued)                               Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned

(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative 2. Conver- 3. Trans- 3a. Deemed 4. Transac- 5. Number of Deriv- 6. Date Exer- 7. Title and Amount of 8. Price 9. Number 10. Owner- 11. Na-
Security sion or action Execu- tion Code ative Securities cisable and Ex- Underlying of of Der- ship ture
(Instr. 3) Exercise Date tion (Instr. 8) Acquired (A) or piration Date Securities Deriv- ivative Form of In-
Price of Date, Disposed of (D) (Month/Day/ (Instr. 3 and 4) ative Secur- of De- direct
Deriv- (Month/ if any (Instr. 3, 4 and 5) Year) Secur- ities rivative Bene-
ative Day/ ity Bene- Secur- ficial
Security Year) (Month/
ficially ity: Own-
Day/ (Instr. Owned Direct ership
Year)     Date     Expira- Amount or 5) at End (D) or (Instr. 4)
Code V (A) (D)     Exer-     tion Title Number of of Indi-
    cisable     Date Shares Month rect (I)
(Instr. 4) (Instr. 4)
Employee stock option (right to buy) $20.5000 04/30/03 M 150,000 (1) 07/14/09 Common Stock 150,000 0 D
Employee stock option (right to buy) $14.8750 04/30/03 M 63,280 (2) 02/17/09 Common Stock 63,280 6,720 D
Employee stock option (right to buy) $17.7500 04/30/03 M 14,367 (3) 05/29/04 Common Stock 14,367 0 D
                               
                               
                               
                               
                               
Explanation of Responses:
 
(1)    One-third of the option vested on July 14, 2000. The remainder of the option vested on May 3, 2001.
(2)    The option vested in three equal annual installments beginning on February 17, 2000.
(3)    The option vested in three equal annual installments beginning on April 29, 1995.
    
    
    
    
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations.
See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
 
Note: File three copies of this Form, one of which must be manually signed.
If space is insufficient, see Instruction 6 for procedure. 		/s/ CHRISTEL H. PAULI
**Signature of Reporting Person 		May 2, 2003
Date
Potential persons who are to respond to the collection of information contained in this form are not
required to respond unless the form displays a currently valid OMB control number. 		Christel H. Pauli, Attorney-in-Fact
for Donald P. de Brier

 

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