UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (AMENDMENT NO. 4) Southern Peru Copper Corporation (Name of Issuer) COMMON STOCK, PAR VALUE $0.01 PER SHARE (Title of Class of Securities) 843611104 (CUSIP Number) S. DAVID COLTON, ESQ. PHELPS DODGE CORPORATION ONE NORTH CENTRAL AVENUE PHOENIX, AZ 85004 (602) 234-8143 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) Copy to: MICHAEL W. BLAIR, ESQ. DEBEVOISE & PLIMPTON LLP 919 THIRD AVENUE NEW YORK, NY 10022 (212) 909-6000 JUNE 9, 2005 (Date of Event which Requires Filing Statement on Schedule 13D) If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of Sections 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box [ ]. NOTE: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other parties to whom copies are to be sent. * The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page. The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). (Continued on following pages) 2 SCHEDULE 13D (AMENDMENT NO. 4) CUSIP NO. 843611104 -------------------------------------------------------------------------------- (1) NAME OF REPORTING PERSON Phelps Dodge Overseas Capital Corporation I.R.S. IDENTIFICATION NO. OF ABOVE PERSON -------------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (A) (X) (B) ( ) -------------------------------------------------------------------------------- (3) SEC USE ONLY -------------------------------------------------------------------------------- (4) SOURCE OF FUNDS N/A -------------------------------------------------------------------------------- (5) CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED ( ) PURSUANT TO ITEMS 2(D) OR 2(E) -------------------------------------------------------------------------------- (6) CITIZENSHIP OR PLACE OF ORGANIZATION Delaware -------------------------------------------------------------------------------- (7) SOLE VOTING POWER NUMBER OF None SHARES ------------------------------------------------------------------ (8) SHARED VOTING POWER BENEFICIALLY None OWNED BY ------------------------------------------------------------------ (9) SOLE DISPOSITIVE POWER EACH None REPORTING ------------------------------------------------------------------ (10) SHARED DISPOSITIVE POWER PERSON WITH None -------------------------------------------------------------------------------- (11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON None -------------------------------------------------------------------------------- (12) CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES ( ) -------------------------------------------------------------------------------- (13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0% of total Common Shares -------------------------------------------------------------------------------- (14) TYPE OF REPORTING PERSON CO -------------------------------------------------------------------------------- 3 CUSIP NO. 843611104 -------------------------------------------------------------------------------- (1) NAME OF REPORTING PERSON Climax Molybdenum B.V. I.R.S. IDENTIFICATION NO. OF ABOVE PERSON -------------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (A) (X) (B) ( ) -------------------------------------------------------------------------------- (3) SEC USE ONLY -------------------------------------------------------------------------------- (4) SOURCE OF FUNDS N/A -------------------------------------------------------------------------------- (5) CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED ( ) PURSUANT TO ITEMS 2(D) OR 2(E) -------------------------------------------------------------------------------- (6) CITIZENSHIP OR PLACE OF ORGANIZATION Netherlands -------------------------------------------------------------------------------- (7) SOLE VOTING POWER NUMBER OF None SHARES ------------------------------------------------------------------ (8) SHARED VOTING POWER BENEFICIALLY None OWNED BY ------------------------------------------------------------------ (9) SOLE DISPOSITIVE POWER EACH None REPORTING ------------------------------------------------------------------ (10) SHARED DISPOSITIVE POWER PERSON WITH None -------------------------------------------------------------------------------- (11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON None -------------------------------------------------------------------------------- (12) CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES ( ) -------------------------------------------------------------------------------- (13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0% of total Common Shares -------------------------------------------------------------------------------- (14) TYPE OF REPORTING PERSON CO -------------------------------------------------------------------------------- 4 CUSIP NO. 843611104 -------------------------------------------------------------------------------- (1) NAME OF REPORTING PERSON Phelps Dodge Corporation I.R.S. IDENTIFICATION NO. OF ABOVE PERSON -------------------------------------------------------------------------------- (2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (A) (X) (B) ( ) -------------------------------------------------------------------------------- (3) SEC USE ONLY -------------------------------------------------------------------------------- (4) SOURCE OF FUNDS N/A -------------------------------------------------------------------------------- (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 -------------------------------------------------------------------------------- (7) SOLE VOTING POWER NUMBER OF None SHARES ------------------------------------------------------------------ (8) SHARED VOTING POWER BENEFICIALLY None OWNED BY ------------------------------------------------------------------ (9) SOLE DISPOSITIVE POWER EACH None REPORTING ------------------------------------------------------------------ (10) SHARED DISPOSITIVE POWER PERSON WITH None -------------------------------------------------------------------------------- (11) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON None -------------------------------------------------------------------------------- (12) CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES ( ) -------------------------------------------------------------------------------- (13) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0% of total Common Shares -------------------------------------------------------------------------------- (14) TYPE OF REPORTING PERSON CO -------------------------------------------------------------------------------- 5 This Amendment No. 4 ("Amendment No. 4") amends and supplements the statement on Schedule 13D initially filed on January 12, 1996, as amended by filings on December 29, 2004, April 8, 2005 and June 3, 2005 (the "Original Filing"). Information reported in the Original Filing remains in effect except to the extent that it is amended, restated or superseded by information contained in this Amendment No. 4. Capitalized terms used and not defined in this Amendment No. 4 have the meanings set forth in the Original Filing. ITEM 4. PURPOSE OF TRANSACTION Item 4 of the Original Filing is hereby amended and supplemented by adding the following: On June 9, 2005, Phelps Dodge Overseas and Climax entered into an Underwriting Agreement (the "Underwriting Agreement") with Citigroup Global Markets Inc., UBS Securities LLC, the Company, Cerro and SPC Investors. Pursuant to the Underwriting Agreement, Phelps Dodge Overseas and Climax agreed to sell to the underwriters named therein (the "Underwriters") 8,338,415 and 2,055,814 shares of Common Stock, respectively, at a purchase price of $40.635 per share. Phelps Dodge Overseas and Climax also agreed to sell an additional 625,381 and 154,186 shares of Common Stock, respectively, at the same purchase price upon the exercise by the Underwriters of an over-allotment option (the "Over-Allotment Option"). The shares to be sold by Phelps Dodge Overseas and Climax pursuant to the Underwriting Agreement, including the shares subject to the Over-Allotment Option, represented all of the Common Stock held by Phelps Dodge Overseas and Climax. The foregoing description of the Underwriting Agreement is qualified in its entirety by reference to the Underwriting Agreement which is filed as Exhibit 1 hereto and incorporated herein by reference. On June 10, 2005, the Underwriters exercised their Over-Allotment Option in full. On June 15, 2005, Phelps Dodge Overseas and Climax sold a total of 8,963,796 and 2,210,000 shares of Common Stock, respectively, to the Underwriters pursuant to the Underwriting Agreement. This total included all of the shares of Common Stock subject to the Over-Allotment Option. The transaction, which constituted a sale of all of the shares of Common Stock held by Phelps Dodge Overseas and Climax, resulted in aggregate proceeds (before expenses and taxes) of approximately $454 million. ITEM 5. INTEREST IN SECURITIES OF THE ISSUER Item 5 of the Original Filing is hereby amended and restated in its entirety as follows: (a) Following the June 15, 2005 transaction described above, neither Phelps Dodge Overseas nor Climax is the beneficial owner of any shares of Common Stock in the Company. 6 As a result, PDC can no longer be deemed to be the beneficial owner of any shares of Common Stock in the Company. To the best knowledge of Phelps Dodge Overseas, Climax and PDC, none of the persons listed on Schedules A, B or C attached hereto is the beneficial owner of any shares of Common Stock, other than J. Steven Whisler, who owns 800 shares of Common Stock. (b) None of Phelps Dodge Overseas, Climax nor PDC has sole or shared power to vote or to direct the vote, nor sole or shared power to dispose or direct the disposition, of any shares of Common Stock. J. Steven Whisler has the sole power to vote or to direct the vote, and the sole power to dispose or direct the disposition, of the Common Stock that he owns. (c) On January 2, 1996, the Exchange Offer and the Founding Stockholder Exchange were completed, resulting in the acquisition by Phelps Dodge Overseas of 11,173,796 shares of Class A Common Stock of the Company. On December 17, 2004, Phelps Dodge Overseas transferred 2,210,000 shares of Class A Common Stock of the Company to PDC as a dividend. Through a series of capital contributions and an inter-company purchase, the 2,210,000 shares of Class A Common Stock of the Company were subsequently transferred to Climax on December 22, 2004. On May 19, 2005, at the New York City office of the Company's counsel, each of Phelps Dodge Overseas and Climax converted all of their Class A Common Stock into an equal number of fully paid and non-assessable shares of the Company's Common Stock. On June 14, 2005, Ramiro G. Peru sold 600 shares of Common Stock at a purchase price of $43.72 per share through a broker in an unsolicited market-order transaction. Mr. Peru no longer owns any shares of Common Stock. On June 15, 2005, Phelps Dodge Overseas and Climax sold a total of 8,963,796 and 2,210,000 shares of Common Stock, respectively, to the Underwriters pursuant to the Underwriting Agreement at a purchase price of $40.635 per share (see above). The transaction was consummated at the New York City office of the counsel for the Underwriters. (e) On June 15, 2005, after consummation of the transaction described above, none of PDC, Phelps Dodge Overseas nor Climax may be deemed to be the beneficial owner of more than 5% of the Company's Common Stock. ITEM 6. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO SECURITIES OF THE ISSUER. Item 6 of the Original Filing is hereby amended and supplemented by adding the following: On June 9, 2005, Phelps Dodge Overseas and Climax entered into an Underwriting Agreement with Citigroup Global Markets Inc., UBS Securities LLC, the Company, Cerro and SPC Investors. On June 10, the Underwriters delivered a written notice exercising in full their 7 Over-Allotment Option. The description of the Underwriting Agreement under Item 4 is incorporated herein by reference in its entirety. ITEM 7. MATERIALS TO BE FILED AS EXHIBITS. Exhibit No. Title 1 Underwriting Agreement, dated June 9, 2005, between Southern Peru Copper Corporation, Cerro Trading Company, Inc., SPC Investors, L.L.C., Phelps Dodge Overseas Capital Corporation, Climax Molybdenum B.V., Citigroup Global Markets Inc. and UBS Securities LLC. 2 Joint Filing Agreement, dated June 23, 2005, between Phelps Dodge Overseas Capital Corporation, Climax Molybdenum B.V. and Phelps Dodge Corporation 8 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. Dated: June 23, 2005 PHELPS DODGE OVERSEAS CAPITAL CORPORATION By: /s/ S. David Colton -------------------------------------- Name: S. David Colton Title: Senior Vice President and General Counsel CLIMAX MOLYBDENUM B.V. By: /s/ David H. Thornton -------------------------------------- Name: David H. Thornton Title: Director PHELPS DODGE CORPORATION By: /s/ S. David Colton -------------------------------------- Name: S. David Colton Title: Senior Vice President and General Counsel 9