SEC Filing | Occidental Petroleum Corporation

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SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 4) CANADIAN OCCIDENTAL PETROLEUM LTD. - -------------------------------------------------------------------------------- (Name of Issuer) Common Shares, par value $1.00 per share - -------------------------------------------------------------------------------- (Title of Class of Securities) 136 420 106 - -------------------------------------------------------------------------------- (CUSIP Number) Donald P. de Brier, Esq. Occidental Petroleum Corporation 10889 Wilshire Boulevard Los Angeles, California 90024 (310) 208-8800 - -------------------------------------------------------------------------------- (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) April 18, 2000 - -------------------------------------------------------------------------------- (Date of Event which Requires Filing of this Statement) If the filing person has previously filed a statement on Schedule 13G to report the acquisition which is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-l(e), 13d-1(f) or 13d-1(g), check the following box [ ]

CUSIP No. 136 420 106 Page 2 of 17 - -------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS/I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Occidental Petroleum Corporation 95-4035997 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (SEE INSTRUCTIONS) (b) [ ] 3. SEC USE ONLY 4. SOURCE OF FUNDS (SEE INSTRUCTIONS) OO 5. (CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)) [ ] 6. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 7. SOLE VOTING POWER 0 8. SHARED VOTING POWER 0 9. SOLE DISPOSITIVE POWER 0 10. SHARED VOTING POWER 0 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 12. CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.0% 14. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 136 420 106 Page 3 of 17 - -------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS/I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Occidental Petroleum Investment Co. 95-2584267 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (SEE INSTRUCTIONS) (b) [ ] 3. SEC USE ONLY 4. SOURCE OF FUNDS (SEE INSTRUCTIONS) OO 5. (CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)) [ ] 6. CITIZENSHIP OR PLACE OF ORGANIZATION California NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 7. SOLE VOTING POWER 0 8. SHARED VOTING POWER 0 9. SOLE DISPOSITIVE POWER 0 10. SHARED VOTING POWER 0 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 12. CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.0% 14. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 136 420 106 Page 4 of 17 - -------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS/I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Occidental Oil and Gas Holding Corporation (formerly Occidental Oil and Gas Corporation) 95-2864974 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (SEE INSTRUCTIONS) (b) [ ] 3. SEC USE ONLY 4. SOURCE OF FUNDS (SEE INSTRUCTIONS) OO 5. (CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)) [ ] 6. CITIZENSHIP OR PLACE OF ORGANIZATION California NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 7. SOLE VOTING POWER 0 8. SHARED VOTING POWER 0 9. SOLE DISPOSITIVE POWER 0 10. SHARED VOTING POWER 0 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 12. CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.0% 14. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 136 420 106 Page 5 of 17 - -------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS/I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) OXY USA Inc. 73-1166880 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (SEE INSTRUCTIONS) (b) [ ] 3. SEC USE ONLY 4. SOURCE OF FUNDS (SEE INSTRUCTIONS) OO 5. (CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)) [ ] 6. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 7. SOLE VOTING POWER 0 8. SHARED VOTING POWER 0 9. SOLE DISPOSITIVE POWER 0 10. SHARED VOTING POWER 0 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 12. CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.0% 14. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 136 420 106 Page 6 of 17 - -------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS/I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Occidental Chemical Holding Corporation 95-2865897 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (SEE INSTRUCTIONS) (b) [ ] 3. SEC USE ONLY 4. SOURCE OF FUNDS (SEE INSTRUCTIONS) OO 5. (CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)) [ ] 6. CITIZENSHIP OR PLACE OF ORGANIZATION California NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 7. SOLE VOTING POWER 0 8. SHARED VOTING POWER 0 9. SOLE DISPOSITIVE POWER 0 10. SHARED VOTING POWER 0 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 12. CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.0% 14. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 136 420 106 Page 7 of 17 - -------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS/I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Oxy Chemical Corporation 95-2813195 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (SEE INSTRUCTIONS) (b) [ ] 3. SEC USE ONLY 4. SOURCE OF FUNDS (SEE INSTRUCTIONS) OO 5. (CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)) [ ] 6. CITIZENSHIP OR PLACE OF ORGANIZATION California NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 7. SOLE VOTING POWER 0 8. SHARED VOTING POWER 0 9. SOLE DISPOSITIVE POWER 0 10. SHARED VOTING POWER 0 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 12. CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.0% 14. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 136 420 106 Page 8 of 17 - -------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS/I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Oxy CH Corporation 95-3992422 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (SEE INSTRUCTIONS) (b) [ ] 3. SEC USE ONLY 4. SOURCE OF FUNDS (SEE INSTRUCTIONS) OO 5. (CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)) [ ] 6. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 7. SOLE VOTING POWER 0 8. SHARED VOTING POWER 0 9. SOLE DISPOSITIVE POWER 0 10. SHARED VOTING POWER 0 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 12. CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.0% 14. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 136 420 106 Page 9 of 17 - -------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS/I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Occidental Chemical Corporation 16-0484732 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (SEE INSTRUCTIONS) (b) [ ] 3. SEC USE ONLY 4. SOURCE OF FUNDS (SEE INSTRUCTIONS) OO 5. (CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)) [ ] 6. CITIZENSHIP OR PLACE OF ORGANIZATION New York NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 7. SOLE VOTING POWER 0 8. SHARED VOTING POWER 0 9. SOLE DISPOSITIVE POWER 0 10. SHARED VOTING POWER 0 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 12. CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.0% 14. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 136 420 106 Page 10 of 17 - -------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS/I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Occidental Chemical Investment (Canada) 1, Inc. 95-4628624 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (SEE INSTRUCTIONS) (b) [ ] 3. SEC USE ONLY 4. SOURCE OF FUNDS (SEE INSTRUCTIONS) OO 5. (CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)) [ ] 6. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 7. SOLE VOTING POWER 0 8. SHARED VOTING POWER 0 9. SOLE DISPOSITIVE POWER 0 10. SHARED VOTING POWER 0 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 12. CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.0% 14. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

CUSIP No. 136 420 106 Page 11 of 17 - -------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS/I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Occidental Chemical Investment (Canada) 2, Inc. 95-4628625 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (SEE INSTRUCTIONS) (b) [ ] 3. SEC USE ONLY 4. SOURCE OF FUNDS (SEE INSTRUCTIONS) OO 5. (CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)) [ ] 6. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 7. SOLE VOTING POWER 0 8. SHARED VOTING POWER 0 9. SOLE DISPOSITIVE POWER 0 10. SHARED VOTING POWER 0 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 12. CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) [ ] 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.0% 14. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO

EXPLANATORY NOTE: This Amendment No. 4 to Schedule 13D ("Amendment No. 3") amends the Statement on Schedule 13D (the "Schedule 13D") originally filed on February 28, 1992, by Occidental Petroleum Corporation ("Occidental"), Occidental Petroleum Investment Co., Occidental Chemical Holding Corporation, Oxy Chemical Corporation, Oxy CH Corporation, Occidental Chemical Corporation, Occidental Oil and Gas Holding Corporation (formerly Occidental Oil and Gas Corporation) and OXY USA Inc.(successor to OXY Oil and Gas USA Inc.), as amended and supplemented by Amendment No. 1 to Schedule 13D filed on March 10, 1992, Amendment No. 2 to Schedule 13D filed on July 27, 1999, and Amendment No. 3 to Schedule 13D filed on March 1, 2000, with respect to the common shares ("CanadianOxy Shares") of Canadian Occidental Petroleum Ltd. ("CanadianOxy") owned by them. 4. Purpose of Transaction On April 18, 2000, pursuant to an Acquisition Agreement dated March 1, 2000 (the "Acquisition Agreement") among Occidental, CanadianOxy and Ontario Teachers' Pension Plan Board, an Ontario corporation ("Ontario Teachers"), Occidental caused (a) OCIC1 and OCIC2 to sell an aggregate of 20,000,000 CanadianOxy shares to CanadianOxy and (b) OCIC1 and OCIC2 to sell 20,223,620 CanadianOxy Shares to Ontario Teachers. As a result of the transactions with CanadianOxy and Teachers, Occidental and its affiliates no longer have any beneficial interest in shares of CanadianOxy. 7. Material to Be Filed as Exhibits Exhibit 1 - Agreement Pursuant to Rule 13d-1(f)(1)(iii).* Exhibit 2 - Underwriting Agreement, dated February 19, 1992, among Occidental, OCC, Oxy CC, CanadianOxy and the Underwriters.* Exhibit 3 - Amalgamation Agreement, dated as of February 18, 1992, among CanadianOxy, Subco (a wholly owned subsidiary of CanadianOxy), HPCL and OCL.* Exhibit 4 - Agreement pursuant to Rule 13d-1(f)(1)(iii).* Exhibit 5 - Instalment Receipt and Pledge Agreement, dated March 10, 1992, by and among Occidental, Oxy CC, CanadianOxy, the Underwriters, Royal Trust Company, as Custodian, and a wholly owned subsidiary of the Custodian.* Exhibit 6 - Agreement Pursuant to Rule 13d-1(k)* Exhibit 7 - Transfer Agreement, dated April 11, 1997, between OCIC1 and Occidental* Exhibit 8 - Transfer Agreement, dated April 11, 1997, between OCIC1 and OCC* Exhibit 9 - Transfer Agreement, dated April 11, 1997, between OCIC1 and OXY USA* Exhibit 10 - Transfer Agreement, dated April 11, 1997, between OCIC2 and Oxy CH* Page 12 of 17

Exhibit 11 - Agreement pursuant to Rule 13d-1(k) Exhibit 12 - Acquisition Agreement, dated March 1, 2000, among CanadianOxy, Occidental, and Ontario Teachers* ------------------ * Previously filed. Page 13 of 17

Signature After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. April 19, 2000 OCCIDENTAL PETROLEUM CORPORATION By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Vice President and Treasurer OCCIDENTAL PETROLEUM INVESTMENT CO. By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Assistant Treasurer OCCIDENTAL CHEMICAL HOLDING CORPORATION By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Vice President and Assistant Treasurer OXY CHEMICAL CORPORATION By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Vice President and Treasurer OXY CH CORPORATION By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Vice President and Treasurer OCCIDENTAL CHEMICAL CORPORATION By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Vice President and Treasurer Page 14 of 17

OCCIDENTAL OIL AND GAS HOLDING CORPORATION By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Vice President and Treasurer OXY USA INC. By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Vice President and Treasurer OCCIDENTAL CHEMICAL INVESTMENT (CANADA) 1, INC. By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Assistant Treasurer OCCIDENTAL CHEMICAL INVESTMENT (CANADA) 2, INC. By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Assistant Treasurer Page 15 of 17

EXHIBIT 11 AGREEMENT Pursuant to Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned agree that the Amendment No. 4 to Statement on Schedule 13D to which this Agreement is attached as Exhibit 11 is filed on behalf of each of us. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same agreement. Dated: April 19, 2000 OCCIDENTAL PETROLEUM CORPORATION By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Vice President and Treasurer OCCIDENTAL PETROLEUM INVESTMENT CO. By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Assistant Treasurer OCCIDENTAL CHEMICAL HOLDING CORPORATION By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Vice President and Assistant Treasurer OXY CHEMICAL CORPORATION By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Vice President and Treasurer OXY CH CORPORATION By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Vice President and Treasurer Page 16 of 17

OCCIDENTAL CHEMICAL CORPORATION By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Vice President and Treasurer OCCIDENTAL OIL AND GAS HOLDING CORPORATION By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Vice President and Treasurer OXY USA INC. By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Vice President and Treasurer OCCIDENTAL CHEMICAL INVESTMENT (CANADA) 1, INC. By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Assistant Treasurer OCCIDENTAL CHEMICAL INVESTMENT (CANADA) 2, INC. By: J. R. Havert ------------------------------------- Name: J. R. Havert Title: Assistant Treasurer Page 17 of 17