SC 13D 1 efc4-0260_55000202fmsc13d.txt SOUTHERN PERU UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 8)* SOUTHERN PERU COPPER CORPORATION ------------------------------------------------------------------------------- (Name of Issuer) COMMON STOCK, PAR VALUE $0.01 ------------------------------------------------------------------------------- (Title of Class of Securities) 843611104 ------------------------------------------- (CUSIP Number) Armando Ortega Gomez Assistant Secretary and General Counsel Grupo Mexico, S.A. de C.V. Baja California 200 Colonia Roma Sur 06760 Mexico City, Mexico Tel. 011-525-574-2067 and Armando Ortega Gomez Secretary of the Board Grupo Minero Mexico Internacional, S.A. de C.V. Baja California 200 Colonia Roma Sur 06760 Mexico City, Mexico Tel. 011-525-574-2067 and Armando Ortega Gomez Secretary Americas Mining Corporation 2575 East Camelback Road, Suite 500 Phoenix, Arizona 85016 Tel. (602) 977-6500 and Armando Ortega Gomez Secretary SPHC II Incorporated 2575 East Camelback Road, Suite 500 Phoenix, Arizona 85016 Tel. (602) 977-6500 ------------------------------------------------------------------------------- (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) copy to: Michael L. Fitzgerald, Esq. Sidley Austin Brown & Wood LLP 787 Seventh Avenue New York, New York 10019 Tel. (212) 839-5300 February 3, 2004 ------------------------------------------------------------ (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 that is the subject of this Schedule 13D, and is filing this schedule because of ss.ss.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 ss.240.13d-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 the following pages)

CUSIP No. 843611104 Page 3 of 16 Pages --------------------------------------------------------------------------------------------------- NAMES OF REPORTING PERSONS. Grupo Mexico, S.A. de C.V. 1 I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). 13-1808503 --------------------------------------------------------------------------------------------------- CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP 2 (SEE INSTRUCTIONS) (a) /X/ (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 Mexico --------------------------------------------------------------------------------------------------- NUMBER OF 7 SOLE VOTING POWER SHARES BENEFICIALLY 0 OWNED BY ---------------------------------------------------------------------------------- EACH 8 SHARED VOTING POWER REPORTING PERSON 43,348,949 WITH ---------------------------------------------------------------------------------- 9 SOLE DISPOSITIVE POWER 0 ---------------------------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER 43,348,949 --------------------------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 43,348,949 --------------------------------------------------------------------------------------------------- 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) /_/ --------------------------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 54.2% of total Common Shares,(1) 65.8% of Class A Common Stock --------------------------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO --------------------------------------------------------------------------------------------------- ----------------- 1 Assuming conversion of all outstanding shares of Class A Common Stock into Common Stock on a one-to-one basis. CUSIP No. 843611104 Page 4 of 16 Pages --------------------------------------------------------------------------------------------------- NAMES OF REPORTING PERSONS. Grupo Minero Mexico Internacional, S.A. de C.V. 1 I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). --------------------------------------------------------------------------------------------------- CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP 2 (SEE INSTRUCTIONS) (a) /X/ (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 7 SOLE VOTING POWER SHARES BENEFICIALLY 0 OWNED BY ---------------------------------------------------------------------------------- EACH 8 SHARED VOTING POWER REPORTING PERSON 17,247,579 WITH ---------------------------------------------------------------------------------- 9 SOLE DISPOSITIVE POWER 0 ---------------------------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER 17,247,579 --------------------------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 17,247,579 --------------------------------------------------------------------------------------------------- 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) /_/ --------------------------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 21.6% of total Common Shares,(1) 26.2% of Class A Common Stock --------------------------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO --------------------------------------------------------------------------------------------------- ----------------- 1 Assuming conversion of all outstanding shares of Class A Common Stock into Common Stock on a one-to-one basis. CUSIP No. 843611104 Page 5 of 16 Pages --------------------------------------------------------------------------------------------------- NAMES OF REPORTING PERSONS. Americas Mining Corporation 1 I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). 86-1010884 --------------------------------------------------------------------------------------------------- CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP 2 (SEE INSTRUCTIONS) (a) /X/ (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 7 SOLE VOTING POWER SHARES BENEFICIALLY 0 OWNED BY ---------------------------------------------------------------------------------- EACH 8 SHARED VOTING POWER REPORTING PERSON 43,348,949 WITH ---------------------------------------------------------------------------------- 9 SOLE DISPOSITIVE POWER 0 ---------------------------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER 43,348,949 --------------------------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 43,348,949 --------------------------------------------------------------------------------------------------- 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) /_/ --------------------------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 54.2% of total Common Shares,(1) 65.8% of Class A Common Stock --------------------------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO --------------------------------------------------------------------------------------------------- ----------------- 1 Assuming conversion of all outstanding shares of Class A Common Stock into Common Stock on a one-to-one basis. CUSIP No. 843611104 Page 6 of 16 Pages --------------------------------------------------------------------------------------------------- NAMES OF REPORTING PERSONS. SPHC II Incorporated 1 I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). 13-3700414 --------------------------------------------------------------------------------------------------- CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP 2 (SEE INSTRUCTIONS) (a) /X/ (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 7 SOLE VOTING POWER SHARES BENEFICIALLY 0 OWNED BY ---------------------------------------------------------------------------------- EACH 8 SHARED VOTING POWER REPORTING PERSON 43,348,949 WITH ---------------------------------------------------------------------------------- 9 SOLE DISPOSITIVE POWER 0 ---------------------------------------------------------------------------------- 10 SHARED DISPOSITIVE POWER 43,348,949 --------------------------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 43,348,949 --------------------------------------------------------------------------------------------------- 12 CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) /_/ --------------------------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 54.2% of total Common Shares,(1) 65.8% of Class A Common Stock --------------------------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO ---------------------------------------------------------------------------------------------------

----------------- 1 Assuming conversion of all outstanding shares of Class A Common Stock into Common Stock on a one-to-one basis. CUSIP No. 843611104 Page 7 of 16 Pages Grupo Mexico, S.A. de C.V. ("GMEXICO"), Grupo Minero Mexico International, S.A. de C.V. ("GMMI"), Americas Mining Corporation ("AMC") and SPHC II Incorporated ("SPHC II") (collectively, Grupo Mexico, GMMI, AMC and SPHC II, the "Reporting Persons") hereby amend the report on Schedule 13D regarding shares of Southern Peru Copper Corporation (the "Company"), originally filed on January 12, 1996, as further amended on March 6, 1996, on November 19, 1999, on October 13, 2000, on May 17, 2001, on July 16, 2001, on February 11, 2003 and on April 2, 2003 (collectively with this Amendment No. 8, the "Schedule 13D"). Unless otherwise indicated, capitalized terms used but not defined herein shall have the same meanings assigned to them in Schedule 13D. Item 1. Security and Issuer. This Schedule 13D relates to Common Stock of the Company, $0.01 par value per share ("Common Stock"), and Class A Common Stock of the Company, $0.01 par value per share ("Class A Common Stock", together with the Common Stock, the "Common Shares"). Item 2. Identity and Background. Item 2 is hereby amended and supplemented by adding the following: Annex I hereto sets forth the name, business address, present principal occupation or employment and citizenship of each director and executive officer of Grupo Mexico. The information set forth in Annex I hereto is incorporated herein by reference. Annex II hereto sets forth the name, business address, present principal occupation or employment and citizenship of each director and executive officer of GMMI. The information set forth in Annex II hereto is incorporated herein by reference. Annex III hereto sets forth the name, business address, present principal occupation or employment and citizenship of each director and executive officer of AMC. The information set forth in Annex III hereto is incorporated herein by reference. Annex IV hereto sets forth the name, business address, present principal occupation or employment and citizenship of each director and executive officer of SPHC II. The information set forth in Annex IV hereto is incorporated herein by reference. During the past five years, the Reporting Persons have not, and, to the best of their knowledge, no person listed in the Annexes hereto have been (a) convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors) or (b) a party to any civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of which such person was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, Federal or State securities laws, or finding any violation with respect to such laws. Item 4. Purpose of Transaction. Item 4 is hereby amended and supplemented by adding the following: On February 3, 2004, GMEXICO, the largest stockholder of the Company, presented a proposal regarding the possible sale to the Company of all the shares of GMEXICO's subsidiary, Minera Mexico, S.A. de C.V. ("MM"), representing 99% of MM outstanding shares, in return for the issuance to it of additional shares of the Company. The Reporting Persons understand that the Company has formed a Special Committee of Disinterested Directors, comprised of members of its Board to evaluate whether the proposal is in the best interests of the stockholders of the Company. There can be no assurances as to whether any agreement will be reached with regard CUSIP No. 843611104 Page 8 of 16 Pages to such transaction. Consequently the Reporting Persons made this proposal reserving the right to change their intentions and plans at any time with regard to such transaction. The Reporting Persons may also from time to time acquire, purchase or sell shares of Common Stock in the open market, in privately negotiated transactions or otherwise, hold such shares or propose changes in the membership of the Board of Directors, propose asset transfers involving the Company or engage in other business transactions involving the Company, as the Reporting Persons may determine at any such time based upon their evaluations of the Company's businesses and prospects and other factors deemed relevant. Except as set forth in this Item 4 and in furtherance of the proposed transaction, the Reporting Persons presently have no plans or proposal that would result in any of the actions set forth in subparagraphs (a) through (j) of Item 4 of Schedule 13 D. Item 5. Interest in Securities of the Issuer. Item 5 is hereby amended and supplemented by adding the following: The following table sets forth all purchases with respect to the Common Stock effected during the past sixty (60) days by the Reporting Persons. Each transaction set forth below represents a sale in the open market.

Reporting Person Trade Date Shares Sold Price Per Share --------------------------------------------------------------------------------------------------------------- GMEXICO 12/04/2003 10,300 $42.59 GMEXICO 12/05/2003 7,100 $42.33 GMEXICO 12/08/2003 10,300 $43.20

Effective January 1, 2004, Controladora Minera Mexico, S.A. de C.V. was merged with and into GMMI and ceased to be the beneficial owner of more than five percent of the Common Shares. Item 7. Material to be Filed as Exhibits. Joint Filing Agreement dated February 4, 2004. [SIGNATURE PAGE FOLLOWS] CUSIP No. 843611104 Page 9 of 16 Pages SIGNATURES 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. GRUPO MEXICO, S.A. de C.V. February 4, 2004 ---------------- Date /s/ Armando Ortega Gomez ________________________________ Signature Armando Ortega Gomez, Assistant Secretary and General Counsel -------------------------------------------------------------- Name/Title GRUPO MINERO MEXICO INTERNACIONAL, S.A. de C.V. February 4, 2004 ---------------- Date /s/ Armando Ortega Gomez ________________________________ Signature Armando Ortega Gomez, Secretary of the Board -------------------------------------------- Name/Title AMERICAS MINING CORPORATION February 4, 2004 ---------------- Date /s/ Armando Ortega Gomez _________________________________ Signature Armando Ortega Gomez, Secretary ------------------------------- Name/Title SPHC II INCORPORATED February 4, 2004 ---------------- Date /s/ Armando Ortega Gomez _________________________________ Signature Armando Ortega Gomez, Secretary ------------------------------- Name/Title The original statement shall be signed by each person on whose behalf the statement is filed or his authorized representative. If the statement is signed on behalf of a person by his authorized representative (other than an executive officer or general partner of the filing person), evidence of the representative's authority to sign on behalf of such person shall be filed with the statement: provided, however, that a power of attorney for this purpose which is already on file with the Commission may be incorporated by reference. The name and any title of each person who signs the statement shall be typed or printed beneath his signature. Attention: Intentional misstatements or omissions of fact constitute federal criminal violations (see 18 U.S.C. 1001). CUSIP No. 843611104 Page 10 of 16 Pages

ANNEX I GRUPO MEXICO Directors and Executive Officers 1. DIRECTORS AND EXECUTIVE OFFICERS OF GRUPO MEXICO. The following table sets forth the name, principal business address, title and present principal occupation or employment of each director and executive officer of Grupo Mexico. Each such person is a citizen of Mexico. ------------------------------------------------------------------------------------------------------------------- NAME PRINCIPAL BUSINESS TITLE PRINCIPAL OCCUPATION ADDRESS ------------------------------------------------------------------------------------------------------------------- German Larrea Mota-Velasco Baja California 200 Chairman of the Board Chairman of the Board and 06760 Mexico City and Chief Executive Chief Executive Officer of Officer Grupo Mexico ------------------------------------------------------------------------------------------------------------------- Genaro Larrea Mota-Velasco 2575 East Camelback Road Director Private Business Suite 500 Phoenix, Arizona 85016 ------------------------------------------------------------------------------------------------------------------- Juan I. Gallardo Thurlow Monte Caucaso 915, Fl. 4 Director President and Chairman of 11000 Mexico City the Board of Grupo Azucarero de Mexico, S.A. de C.V. ------------------------------------------------------------------------------------------------------------------- Juan Sanchez Navarro Peon Campos Eliseos 400, Fl. 19 Director Vice President of Grupo 11000 Mexico City Modelo, S.A. de C.V. ------------------------------------------------------------------------------------------------------------------------ Romulo O'Farril Jr. Avenue San Jeronimo 790-A Director President and General 11000 Mexico City Director of Novedades de Acapulco, S.A. de C.V. ------------------------------------------------------------------------------------------------------------------------ Claudio X. Gonzalez Jose Luis LaGrange 103, Fl. 3 Director Chairman of the Board and 11510 Mexico City General Director of Kimberly Clark de Mexico, S.A. de C.V. ------------------------------------------------------------------------------------------------------------------------ Jose Mendoza Fernandez Privada Juarez 43 Director Chairman of the Board of 04000 Mexico City Desarrollos Industriales E Immobiliarios, S.A. de C.V. ------------------------------------------------------------------------------------------------------------------------ Prudencio Lopez Martinez Vasco de Quiroga 2121, Fl. 2 Director President of Sanvica, S.A. 01210 Mexico City de C.V. ------------------------------------------------------------------------------------------------------------------------ Carlos Giron Peltier Lamartine 730 Director Retired 11560 Mexico City ------------------------------------------------------------------------------------------------------------------------ Antonio Madero Bracho Monte Pelvoux 220, Fl. 8 Director Executive President of San 11000 Mexico City Luis Corporacion, S.A. de C.V. ------------------------------------------------------------------------------------------------------------------------ CUSIP No. 843611104 Page 11 of 16 Pages ------------------------------------------------------------------------------------------------------------------------ NAME PRINCIPAL BUSINESS TITLE PRINCIPAL OCCUPATION ADDRESS ------------------------------------------------------------------------------------------------------------------------ Luis Tellez Kuenzler Paseo de Los Tamarindos 400, Director Executive Vice President Torre B, Fl. 32 of Grupo Desc, S.A. de C.V. 05120 Mexico City ------------------------------------------------------------------------------------------------------------------------ Emilio Carrillo Gamboa Plaza ScotiaBank, Director Partner of Bufete Blvd. Manuel Avila Camacho 1- Carrillo, S.C. 609, 11009, Mexico City ------------------------------------------------------------------------------------------------------------------------ Agustin Santamarina V. Campos Eliseos 345 Director and Secretary Partner of Santamarina y 11560 Mexico City of the Board Steta, S.C. ------------------------------------------------------------------------------------------------------------------------ Daniel Tellechea Salido 2575 East Camelback Director President of Asarco Suite 500 Phoenix, Arizona 85016 ------------------------------------------------------------------------------------------------------------------------ Juan Rebolledo Gout Baja California 200 Vice President, Vice President of 06760 Mexico City International Relations International Relations of Grupo Mexico ------------------------------------------------------------------------------------------------------------------------ Hector Garcia de Quevedo Baja California 200 Director and General General Director of Topete 06760 Mexico City Director of Special Special Assignments of Assignments Grupo Mexico ------------------------------------------------------------------------------------------------------------------------ Xavier Garcia de Quevedo Baja California 200 Director President of Minera Topete 06760 Mexico City Mexico, S.A. de C.V. ------------------------------------------------------------------------------------------------------------------------ Oscar Gonzalez Rocha Av. Caminos del Inca Director President of Southern Peru 171 Lima, Peru Copper Corporation ------------------------------------------------------------------------------------------------------------------------ Alfredo Casar Perez Bosque de Ciruelos 99 Director President and Managing 11700 Mexico City Director of Ferrocarril Mexicano, S.A. de C.V. ------------------------------------------------------------------------------------------------------------------------ Armando Ortega Gomez Baja California 200 Assistant Secretary and General Counsel of Grupo 06760 Mexico City General Counsel Mexico ------------------------------------------------------------------------------------------------------------------------ Gabino Paez Gonzalez Baja California 200 General Director, Human General Director of Human 06760 Mexico City Resources Resources of Grupo Mexico ------------------------------------------------------------------------------------------------------------------------ Ernesto Duran Trinidad Baja California 200 Corporate Comptroller Corporate Comptroller of 06760 Mexico City Grupo Mexico ------------------------------------------------------------------------------------------------------------------------

CUSIP No. 843611104 Page 12 of 16 Pages

ANNEX II GMMI Directors and Executive Officers 2. DIRECTORS AND EXECUTIVE OFFICERS OF GMMI. The following table sets forth the name, principal business address, title and present principal occupation or employment of each director and executive officer of GMMI. Each such person is a citizen of Mexico. ----------------------------------------------------------------------------------------------------------------------- NAME PRINCIPAL BUSINESS TITLE PRINCIPAL OCCUPATION ADDRESS ----------------------------------------------------------------------------------------------------------------------- German Larrea Baja California 200 President, Chairman of Chairman of the Board and Mota-Velasco 06760 Mexico City the Board and Chief Chief Executive Officer of Executive Officer Grupo Mexico ----------------------------------------------------------------------------------------------------------------------- Juan Sanchez Navarro Peon Campos Eliseos 400, Fl. 19 Director Vice President of Grupo 11000 Mexico City Modelo, S.A. de C.V. ----------------------------------------------------------------------------------------------------------------------- Prudencio Lopez Martinez Vasco de Quiroga 2121, Fl. 2 Director President of Sanvica, S.A. 01210 Mexico City de C.V. ----------------------------------------------------------------------------------------------------------------------- Juan I. Gallardo Thurlow Monte Caucaso 915, Fl. 4 Director President and Chairman of 11000 Mexico City the Board of Grupo Azucarero e Mexico, S.A. de C.V. ----------------------------------------------------------------------------------------------------------------------- Carlos Giron Peltier Lamartine 730 Director Retired 11560 Mexico City ----------------------------------------------------------------------------------------------------------------------- Genaro Larrea 2575 East Camelback Road Suite Director Private Business Mota-Velasco 500 Phoenix, Arizona 85016 ----------------------------------------------------------------------------------------------------------------------- Agustin Santamarina V. Campos Eliseos 400, Fl. 19 Director Partner of Santamarina y 11000 Mexico City Steta, S.C. ----------------------------------------------------------------------------------------------------------------------- Armando Ortega Gomez Baja California 200 Secretary of the Board General Counsel of Grupo 06760 Mexico City Mexico -----------------------------------------------------------------------------------------------------------------------

CUSIP No. 843611104 Page 13 of 16 Pages

ANNEX III AMC Directors and Executive Officers 1. DIRECTORS AND EXECUTIVE OFFICERS OF AMC. The following table sets forth the name, principal business address, title and present principal occupation or employment of each director and executive officer of AMC. Each such person is a citizen of Mexico. ----------------------------------------------------------------------------------------------------------------------- NAME PRINCIPAL BUSINESS TITLE PRINCIPAL OCCUPATION ADDRESS ----------------------------------------------------------------------------------------------------------------------- German Larrea Baja California 200 Chairman of the Board and Chairman of the Board and Mota-Velasco 06760 Mexico City Chief Executive Officer Chief Executive Officer of Grupo Mexico ----------------------------------------------------------------------------------------------------------------------- Oscar Gonzalez Av. Caminos Del Inca Director President of Southern Peru Rocha 171 Lima, Peru Copper Corporation ----------------------------------------------------------------------------------------------------------------------- Xavier Garcia de Baja California 200 Director, Vice President President of Minera Quevedo Topete 06760 Mexico City and Chief Operating Officer Mexico, S.A. de C.V. ----------------------------------------------------------------------------------------------------------------------- Ernesto Duran Baja California 200 Controller and Assistant Corporate Controller of Trinidad 06760 Mexico City Secretary Grupo Mexico ----------------------------------------------------------------------------------------------------------------------- Hector Nieto Castilla Baja California 200 President and Chief President and Chief 06760 Mexico City Financial Officer Financial Officer of AMC ----------------------------------------------------------------------------------------------------------------------- Armando Ortega Gomez Baja California 200 Secretary General Counsel of Grupo 06760 Mexico City Mexico -----------------------------------------------------------------------------------------------------------------------

CUSIP No. 843611104 Page 14 of 16 Pages

ANNEX IV SPHC II Directors and Executive Officers 2. DIRECTORS AND EXECUTIVE OFFICERS OF SPHC II. The following table sets forth the name, principal business address, title and present principal occupation or employment of each director and executive officer of SPHC II. Each such person is a citizen of Mexico. ----------------------------------------------------------------------------------------------------------------------- NAME PRINCIPAL BUSINESS TITLE PRINCIPAL OCCUPATION ADDRESS ----------------------------------------------------------------------------------------------------------------------- German Larrea Baja California 200 Chairman of the Board of Director, Chairman of the Mota-Velasco 06760 Mexico City Directors Board and Chief Executive Officer of Grupo Mexico ----------------------------------------------------------------------------------------------------------------------- Genaro Larrea 2575 East Camelback Road Director and President Private Business Mota-Velasco Suite 500 Phoenix, Arizona 85016 ----------------------------------------------------------------------------------------------------------------------- Daniel Tellechea Baja California 200 Director and Vice President Administration and Finance Salido 06760 Mexico City President of Grupo Mexico ----------------------------------------------------------------------------------------------------------------------- Ernesto Duran Trinidad Baja California 200 Controller Corporate Comptroller of 06760 Mexico City Grupo Mexico ----------------------------------------------------------------------------------------------------------------------- Armando F. Ortega Gomez Baja California 200 Director and Secretary General Counsel of Grupo 06760 Mexico, D.F. Mexico ----------------------------------------------------------------------------------------------------------------------- Hector Garcia de Quevedo Baja California 200 Treasurer General Director for 06760 Mexico, D.F. Special Affairs for Grupo Mexico -----------------------------------------------------------------------------------------------------------------------

CUSIP No. 843611104 Page 15 of 16 Pages Exhibit Index 1. Joint Filing Agreement dated as of February 4, 2004. CUSIP No. 843611104 Page 16 of 16 Pages Exhibit 1 JOINT FILING AGREEMENT The undersigned acknowledge and agree that the foregoing statement on Schedule 13D is filed on behalf of each of the undersigned and that all subsequent amendments to this statement shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing agreements. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that it knows or has reason to believe that such information is inaccurate. This Agreement may be executed in counterparts and each of such counterparts taken together shall constitute one and the same instrument. Dated: February 4, 2004 GRUPO MINERO MEXICO INTERNACIONAL, S.A. de C.V. By: /s/ Armando Ortega, Gomez ----------------------------------- Armando Ortega Gomez, Secretary of the Board Dated: February 4, 2004 AMERICAS MINING CORPORATION By: /s/ Armando Ortega, Gomez ---------------------------------- Armando Ortega Gomez, Assistant Secretary Dated: February 4, 2004 SPHC II INCORPORATED By: /s/ Armando Ortega, Gomez ----------------------------------- Armando Ortega Gomez, Secretary