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

                                 SCHEDULE 13D

                   Under the Securities Exchange Act of 1934
                              (Amendment No. 6)*

                       SOUTHERN PERU COPPER CORPORATION
------------------------------------------------------------------------------
                               (Name of Issuer)

                         COMMON STOCK, PAR VALUE $0.01
------------------------------------------------------------------------------
                        (Title of Class of Securities)

                                   843611104
                        ------------------------------
                                (CUSIP Number)

                            Daniel Tellechea Salido
                     Administration and Finance President
                          Grupo Mexico, S.A. de C.V.
                              Baja California 200
                               Colonia Roma Sur
                           06760 Mexico City, Mexico
                             Tel. 011-525-574-2067

                                      and

                            Daniel Tellechea Salido
                              Vice President and
                     Administration and Finance President
                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

                            Daniel Tellechea Salido
                     Administration and Finance President
                   Controladora Minera Mexico, S.A. de C.V.
                              Baja California 200
                               Colonia Roma Sur
                           06760 Mexico City, Mexico
                             Tel. 011-525-574-2067

                             (Page 1 of 23 Pages)





CUSIP NO. 843611104                                         Page 2 of 23 Pages

                                      and

                            Daniel Tellechea Salido
                  Vice President and Chief Financial Officer
                          Americas Mining Corporation
                      2575 East Camelback Road, Suite 500
                            Phoenix, Arizona 85016
                              Tel. (602) 977-6500

                                      and

                           Douglas McAllister, Esq.
                                General Counsel
                              ASARCO Incorporated
                      2575 East Camelback Road, Suite 500
                            Phoenix, Arizona 85016
                              Tel. (602) 977-6500

                                      and

                            Daniel Tellechea Salido
                         Vice President and Treasurer
                      Southern Peru Holdings Corporation
                              Baja California 200
                               Colonia Roma Sur
                           06760 Mexico City, Mexico
                             Tel. 011-525-574-2067

------------------------------------------------------------------------------
          (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 2, 2003
         --------------------------------------------------------------
            (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 23 Pages


         
-----------------------------------------------------------------------------------------------
    1       NAMES OF REPORTING PERSONS.                        Grupo Mexico, S.A. de C.V.
            I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY).     13-1808503
-----------------------------------------------------------------------------------------------
    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
            (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                        0
        BENEFICIALLY          -----------------------------------------------------------------
          OWNED BY                8      SHARED VOTING POWER
            EACH                         43,534,549
          REPORTING           -----------------------------------------------------------------
           PERSON                 9      SOLE DISPOSITIVE POWER
            WITH                         0
                              -----------------------------------------------------------------
                                 10      SHARED DISPOSITIVE POWER
                                         43,534,549
-----------------------------------------------------------------------------------------------
    11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

            43,534,549
-----------------------------------------------------------------------------------------------
    12      CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
            CERTAIN SHARES (SEE INSTRUCTIONS)                                             /_/
-----------------------------------------------------------------------------------------------
    13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

            54.4% 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 23 Pages

-----------------------------------------------------------------------------------------------
    1       NAMES OF REPORTING PERSONS.         Grupo Minero Mexico Internacional, S.A. de C.V.
            I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY).
-----------------------------------------------------------------------------------------------
    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
            (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                        0
        BENEFICIALLY          -----------------------------------------------------------------
          OWNED BY                8      SHARED VOTING POWER
            EACH                         17,249,520
          REPORTING           -----------------------------------------------------------------
           PERSON                 9      SOLE DISPOSITIVE POWER
            WITH                         0
                              -----------------------------------------------------------------
                                 10      SHARED DISPOSITIVE POWER
                                         17,249,520
-----------------------------------------------------------------------------------------------
    11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

            17,249,520
-----------------------------------------------------------------------------------------------
    12      CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
            CERTAIN SHARES (SEE INSTRUCTIONS)                                             /_/
-----------------------------------------------------------------------------------------------
    13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

            21.55% of total Common Shares,(1) 26.07% 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 23 Pages


-----------------------------------------------------------------------------------------------
    1       NAMES OF REPORTING PERSONS.               Controladora Minera Mexico, S.A. de C.V.
            I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY).
-----------------------------------------------------------------------------------------------
    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
            (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                        0
        BENEFICIALLY          -----------------------------------------------------------------
          OWNED BY                8      SHARED VOTING POWER
            EACH                         17,249,520
          REPORTING           -----------------------------------------------------------------
           PERSON                 9      SOLE DISPOSITIVE POWER
            WITH                         0
                              -----------------------------------------------------------------
                                 10      SHARED DISPOSITIVE POWER
                                         17,249,520
-----------------------------------------------------------------------------------------------
    11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

            17,249,520
-----------------------------------------------------------------------------------------------
    12      CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
            CERTAIN SHARES (SEE INSTRUCTIONS)                                             /_/
-----------------------------------------------------------------------------------------------
    13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

            21.55% of total Common Shares,(1) 26.07% 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 23 Pages


-----------------------------------------------------------------------------------------------
    1       NAMES OF REPORTING PERSONS.                           Americas Mining Corporation
            I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY).     86-1010884
-----------------------------------------------------------------------------------------------
    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
            (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 ITEM 2(d) OR 2(e)                                                          /_/
-----------------------------------------------------------------------------------------------
    6       CITIZENSHIP OR PLACE OF ORGANIZATION                      Delaware
-----------------------------------------------------------------------------------------------
          NUMBER OF               7      SOLE VOTING POWER
           SHARES                        0
        BENEFICIALLY          -----------------------------------------------------------------
          OWNED BY                8      SHARED VOTING POWER
            EACH                         43,534,549
          REPORTING           -----------------------------------------------------------------
           PERSON                 9      SOLE DISPOSITIVE POWER
            WITH                         0
                              -----------------------------------------------------------------
                                 10      SHARED DISPOSITIVE POWER
                                         43,534,549
-----------------------------------------------------------------------------------------------
    11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

            43,534,549
-----------------------------------------------------------------------------------------------
    12      CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
            CERTAIN SHARES (SEE INSTRUCTIONS)                                             /_/
-----------------------------------------------------------------------------------------------
    13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

            54.4% 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 23 Pages


-----------------------------------------------------------------------------------------------
    1       NAMES OF REPORTING PERSONS.                               ASARCO Incorporated
            I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY).     13-4924440
-----------------------------------------------------------------------------------------------
    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
            (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                      New Jersey
-----------------------------------------------------------------------------------------------
          NUMBER OF               7      SOLE VOTING POWER
           SHARES                        0
        BENEFICIALLY          -----------------------------------------------------------------
          OWNED BY                8      SHARED VOTING POWER
            EACH                         43,534,549
          REPORTING           -----------------------------------------------------------------
           PERSON                 9      SOLE DISPOSITIVE POWER
            WITH                         0
                              -----------------------------------------------------------------
                                 10      SHARED DISPOSITIVE POWER
                                         43,534,549
-----------------------------------------------------------------------------------------------
    11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

            43,534,549
-----------------------------------------------------------------------------------------------
    12      CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
            CERTAIN SHARES (SEE INSTRUCTIONS)                                             /_/
-----------------------------------------------------------------------------------------------
    13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

            54.4% 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 8 of 23 Pages


-----------------------------------------------------------------------------------------------
    1       NAMES OF REPORTING PERSONS.                      Southern Peru Holdings Corporation
            I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY).     13-4152060
-----------------------------------------------------------------------------------------------
    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
            (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                        0
        BENEFICIALLY          -----------------------------------------------------------------
          OWNED BY                8      SHARED VOTING POWER
            EACH                         43,348,949
          REPORTING           -----------------------------------------------------------------
           PERSON                 9      SOLE DISPOSITIVE POWER
            WITH                         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 9 of 23 Pages


          Grupo Mexico, S.A. de C.V. ("Grupo Mexico"), Grupo Minero Mexico
International, S.A. de C.V. ("GMMI"), Controladora Minera Mexico, S.A. de C.V.
("Controladora"), Americas Mining Corporation ("AMC"), ASARCO Incorporated
("ASARCO") and Southern Peru Holdings Corporation ("SPHC") (collectively,
Grupo Mexico, GMMI, Controladora, AMC, ASARCO and SPHC, 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 and on July 16, 2001 (collectively, 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 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 Controladora. 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 AMC. The information set forth in Annex IV hereto is
incorporated herein by reference.

          Annex V hereto sets forth the name, business address, present
principal occupation or employment and citizenship of each director and
executive officer of ASARCO. The information set forth in Annex V hereto is
incorporated herein by reference.

          Annex VI hereto sets forth the name, business address, present
principal occupation or employment and citizenship of each director and
executive officer of SPHC. The information set forth in Annex VI 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 on Annex I through Annex VII
hereto has 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.





CUSIP NO. 843611104                                         Page 10 of 23 Pages


Item 3.   Source and Amount of Funds or Other Consideration.

          Please refer to Item 4.

Item 4.   Purpose of Transaction.

          Item 4 is hereby amended and supplemented by adding the following:

          As previously disclosed, certain of the Reporting Persons have for
some time intended to engage in a transaction in which SPHC would sell to AMC
all of the Class A Common Stock of the Company owned by it. SPHC would
dividend the funds received from AMC to ASARCO, and ASARCO would use the
proceeds to repay debt and to fund a trust created pursuant to a consent
decree approved by the United States District Court for the District of
Arizona on February 2, 2003 (the "Consent Decree"). To complete this
transaction, AMC intends to borrow the funds. Pursuant to the terms of the
Consent Decree, AMC, ASARCO, SPHC and SPHC II Incorporated, a wholly-owned
subsidiary of AMC ("SPHC II"), have agreed to enter into a Stock Purchase
Agreement (the "Stock Purchase Agreement") with respect to the sale by SPHC of
all of its Class A Common Stock to AMC for consideration of $765.0 million in
a combination of cash, promissory notes and cancellation of indebtedness. A
form of the Stock Purchase Agreement is attached as Exhibit 1 hereto and is
incorporated herein by reference. ASARCO would continue to be a wholly-owned
subsidiary of AMC and Grupo Mexico after that sale. If the transaction is
completed, it is intended that the shares of Class A Common Stock would be
pledged to certain of AMC's lenders.

          Consummation of the transactions contemplated by the Stock Purchase
Agreement will be subject to the receipt by AMC of financing and certain other
customary conditions. There can be no assurance as to whether, and if so, when
the Stock Purchase Agreement might be signed and, if signed, whether the
transactions contemplated by the Stock Purchase Agreement will be consummated.
The effect that the transactions contemplated by the Stock Purchase Agreement
may have on the Company and its operations (and on any other interest the
Reporting Persons have in the Company) will remain subject to the consummation
of the transactions contemplated by the Stock Purchase Agreement.

          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, as the Reporting Persons may determine
at any such time based upon its evaluation of the Company's businesses and
prospects, alternative investment opportunities and all other factors deemed
relevant. Except as described in this Item 4, as of the date of this statement
none of the Reporting Persons has any plans or has made any proposals that
relate to or would result in any action enumerated in Items 4(a) through (j)
of Schedule 13D.

Item 5.   Interest in Securities of the Issuer.

          Item 5 is hereby amended and supplemented by the following:

          The Reporting Persons beneficially own 43,348,949 shares of Class A
Common Stock, which are convertible on a one-to-one basis into shares of
Common Stock, representing approximately 65.8% of the issued and outstanding
shares of Class A Common Stock and approximately 54.2% of the issued and
outstanding Common Stock (assuming conversion of all outstanding shares of
Class A Common Stock into Common Stock on a one-to-one basis). The Reporting
Persons other than SPHC also beneficially own 185,600 shares of Common Stock,
which were acquired through open market transactions, the last of which
occurred November 16, 2001. The shares of Common Stock represent approximately
1.3% of the issued and outstanding shares of Common Stock and 0.2% of the
issued and outstanding Common Stock (assuming conversion of all outstanding
shares of Class A Common Stock into Common Stock on a one-to-one basis). Other
than as set forth herein, the Reporting Persons have neither acquired nor
disposed of any shares of Class A Common Stock or Common Stock since the date
of the Schedule 13D.

          Grupo Mexico, AMC and ASARCO have shared power to vote and shared
dispositive power of 43,534,549 shares of Class A Common Stock. SPHC has
shared power to vote and shared dispositive power of 43,348,949 shares of
Class A Common Stock. GMMI and Controladora have shared power to vote and
shared dispositive power of 17,249,520 shares of Class A Common Stock.





CUSIP NO. 843611104                                         Page 11 of 23 Pages


          Except as set forth in the Schedule 13D, none of the Reporting
Persons or, to their knowledge, any of the persons listed in the Annexes
hereto (other than those individuals named in Schedule A hereto) beneficially
owns any equity security of the Company and none of the Reporting Persons or,
to their knowledge, any of the respective directors, executive officers or
subsidiaries of any of the foregoing, has effected any transaction in any
equity security of the Company during the past 60 days.

          Except as set forth in the Schedule 13D and other than the
Stockholders' Agreement, a copy of which was previously filed as Exhibit 1 to
the Schedule 13D, none of the Reporting Persons, or to their knowledge, any of
the persons listed in the Annexes hereto, has any contract, arrangement,
understanding or relationships (legal or otherwise) among the persons named in
Item 2 and between such persons and any person with respect to any securities
of the Company, including but not limited to transfer or voting of any of the
securities of the Company, finder's fee, joint ventures, loan or option
arrangements, puts or calls, guaranties of profits, division of profits or
loss, or the giving or withholding of proxies.

          Except as set forth in the Schedule 13D, no person is known to any
of the Reporting Persons or to their knowledge to have the right to receive or
the power to direct the receipt of dividends from, or proceeds from the sale
of, any shares of the Common Shares.

          Except as set forth in the Schedule 13D, no Reporting Person ceased
to be the beneficial owner of more than five percent of the Common Shares.

Item 6.   Contracts, Arrangements, Understandings or Relationships with
          Respect to Securities of the Issuer.

          Please refer to Item 4.

Item 7.   Material to be Filed as Exhibits.

1.        Form of Stock Purchase Agreement.

2.        Joint Filing Agreement dated July 13, 2001 among the Reporting
          Persons (filed as Exhibit 1 to Amendment No. 5 of the Schedule 13D
          dated July 16, 2001 and incorporated by reference herein).






CUSIP NO. 843611104                                         Page 12 of 23 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 11, 2003
                 ----------------
                 Date
                 /s/ Daniel Tellechea Salido
                 ---------------------------
                 Signature
                 Daniel Tellechea Salido, Administration and Finance President
                 Name/Title

                 GRUPO MINERO MEXICO INTERNACIONAL, S.A. de C.V.
                 February 11, 2003
                 -----------------
                 Date
                 /s/ Daniel Tellechea Salido
                 ---------------------------
                 Signature
                 Daniel Tellechea Salido, Administration and Finance President
                 Name/Title

                 CONTROLADORA MINERA MEXICO, S.A. de C.V.
                 February 11, 2003
                 ----------------
                 Date
                 /s/ Daniel Tellechea Salido
                 ---------------------------
                 Signature
                 Daniel Tellechea Salido, Administration and Finance President
                 Name/Title

                 AMERICAS MINING CORPORATION
                 February 11, 2003
                 -----------------
                 Date
                 /s/ Daniel Tellechea Salido
                 ---------------------------
                 Signature
                 Daniel Tellechea Salido, Vice President and Chief Financial
                 Officer
                 Name/Title

                 ASARCO INCORPORATED
                 February 11, 2003
                 -----------------
                 Date
                 /s/ Daniel Tellechea Salido
                 ---------------------------
                 Signature
                 Daniel Tellechea Salido, Executive Vice President and Chief
                 Financial Officer
                 Name/Title

                 SOUTHERN PERU HOLDINGS CORPORATION
                 February 11, 2003
                 -----------------
                 Date
                 /s/ Daniel Tellechea Salido
                 ---------------------------
                 Signature
                 Daniel Tellechea Salido, Vice President and Treasurer
                 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 13 of 23 Pages

                                  Schedule A
                                  ----------

        BENEFICIAL OWNERSHIP OF COMMON SHARES BY CERTAIN DIRECTORS OF
                             THE REPORTING PERSONS

     The following table sets forth the name of each director of the Reporting
Owner who beneficially owns Common Shares of the Company and the total number
of Common Shares beneficially owned by such director as of the date of this
Schedule 13D.

        ---------------------------------    ----------------------------
                     NAME                    TOTAL OF COMMON SHARES OWNED

        ---------------------------------    ----------------------------
        Hector Garcia de Quevedo Topete                  400

        ---------------------------------    ----------------------------
        Xavier Garcia de Quevedo Topete                  400

        ---------------------------------    ----------------------------
        German Larrea Mota-Velasco                       800

        ---------------------------------    ----------------------------
        Genaro Larrea Mota-Velasco                       800

        ---------------------------------    ----------------------------
        Daniel Tellechea Salido                          200

        ---------------------------------    ----------------------------
        Armando Ortega Gomez                             800

        ---------------------------------    ----------------------------




CUSIP NO. 843611104                                         Page 14 of 23 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            Baja California 200        Chairman of the       Chairman of the Board
Mota-Velasco             06760 Mexico City          Board and Chief       and Chief Executive
                                                    Executive Officer     Officer of Grupo
                                                                          Mexico
-------------------------------------------------------------------------------------------------
Genaro Larrea            2575 East Camelback Road   Director              President of ASARCO
Mota-Velasco             Suite 500
                         Phoenix, Arizona 85016
-------------------------------------------------------------------------------------------------
Juan I. Gallardo         Monte Caucaso 915, Fl. 4   Director              President and
Thurlow                  11000 Mexico City                                Chairman of the Board
                                                                          of Grupo Azucarero de
                                                                          Mexico, S.A. de C.V.
-------------------------------------------------------------------------------------------------
Juan Sanchez Navarro     Campos Eliseos 400, Fl.    Director              Vice President of
Peon                     19                                               Grupo Modelo, S.A. de
                         11000 Mexico City                                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,    Director              Chairman of the Board
                         Fl. 3                                            and General Director
                         11510 Mexico City                                of Kimberly Clark de
                                                                          Mexico, S.A. de C.V.
-------------------------------------------------------------------------------------------------
Jose Mendoza Fernandez   Privada Juarez 43          Director              Chairman of the Board
                         04000 Mexico City                                of Desarrollos
                                                                          Industriales e
                                                                          Immobiliarios, S.A.
                                                                          de C.V.
-------------------------------------------------------------------------------------------------
Prudencio Lopez          Vasco de Quiroga           Director              President of Sanvica,
Martinez                 2121, Fl. 2                                      S.A. de C.V.
                         01210 Mexico City
-------------------------------------------------------------------------------------------------
Carlos Giron Peltier     Lamartine 730              Director              Retired
                         11560 Mexico City
-------------------------------------------------------------------------------------------------
Antonio Madero Bracho    Monte Pelvoux 220, Fl. 8   Director              Executive President
                         11000 Mexico City                                of San Luis
                                                                          Corporacion, S.A. de
                                                                          C.V.
-------------------------------------------------------------------------------------------------





CUSIP NO. 843611104                                                         Page 15 of 23 Pages


-------------------------------------------------------------------------------------------------
Luis Tellez Kuenzler     Paseo de Los Tamarindos    Director              Executive Vice
                         400, Torre B, Fl. 32                             President of Grupo
                         05120 Mexico City                                Desc, S.A. de C.V.
-------------------------------------------------------------------------------------------------
Agustin Santamarina V.   Campos Eliseos 345         Director and          Partner of
                         11560 Mexico City          Secretary of the      Santamarina y Steta,
                                                    Board                 S.C.
-------------------------------------------------------------------------------------------------
Daniel Tellechea Salido  Baja California 200        Director and          Administration and
                         06760 Mexico City          Administration and    Finance President of
                                                    Finance President     Grupo Mexico
-------------------------------------------------------------------------------------------------
Juan Rebolledo Gout      Baja California 200        Vice President,       Vice President of
                         06760 Mexico City          International         International
                                                    Relations             Relations of Grupo
                                                                          Mexico
-------------------------------------------------------------------------------------------------
Hector Garcia de         Baja California 200        Director and          General Director of
Quevedo Topete           06760 Mexico City          General Director of   Special Assignments
                                                    Special Assignments   of Grupo Mexico
-------------------------------------------------------------------------------------------------
Xavier Garcia de         Baja California 200        Director              President of Minera
Quevedo Topete           06760 Mexico City                                Mexico, S.A. de C.V.
-------------------------------------------------------------------------------------------------
Oscar Gonzalez Rocha     Av. Caminos del Inca       Director              President of Southern
                         171 Lima, Peru                                   Peru Copper
                                                                          Corporation
-------------------------------------------------------------------------------------------------
Alfredo Casar Perez      Bosque de Ciruelos 99      Director              President and
                         11700 Mexico City                                Managing Director of
                                                                          Ferrocarril Mexicano,
                                                                          S.A. de C.V.
-------------------------------------------------------------------------------------------------
Armando Ortega Gomez     Baja California 200        Assistant Secretary   General Legal
                         06760 Mexico City          and General Legal     Director of Grupo
                                                    Director              Mexico
-------------------------------------------------------------------------------------------------
Gabino Paez Gonzalez     Baja California 200        General Director,     General Director of
                         06760 Mexico City          Human Resources       Human Resources of
                                                                          Grupo Mexico
-------------------------------------------------------------------------------------------------
Ernesto Duran Trinidad   Baja California 200        Corporate             Corporate Comptroller
                         06760 Mexico City          Comptroller           of Grupo Mexico
-------------------------------------------------------------------------------------------------





CUSIP NO. 843611104                                        Page 16 of 23 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   Chairman of the Board
Mota-Velasco             06760 Mexico City            of the Board and      and Chief Executive
                                                      Chief Executive       Officer of Grupo
                                                      Officer               Mexico
---------------------------------------------------------------------------------------------------
Juan Sanchez Navarro     Campos Eliseos 400, Fl. 19   Director              Vice President of
Peon                     11000 Mexico City                                  Grupo Modelo, S.A. de
                                                                            C.V.
---------------------------------------------------------------------------------------------------
Prudencio Lopez          Vasco de Quiroga             Director              President of Sanvica,
Martinez                 2121, Fl. 2                                        S.A. de C.V.
                         01210 Mexico City
---------------------------------------------------------------------------------------------------
Juan I. Gallardo         Monte Caucaso 915, Fl. 4     Director              President and
Thurlow                  11000 Mexico City                                  Chairman of the Board
                                                                            of Grupo Azucarero de
                                                                            Mexico, S.A. de C.V.
---------------------------------------------------------------------------------------------------
Carlos Giron Peltier     Lamartine 730                Director              Retired
                         11560 Mexico City
---------------------------------------------------------------------------------------------------
Genaro Larrea            2575 East Camelback Road     Director              President of ASARCO
Mota-Velasco             Suite 500
                         Phoenix, Arizona 85016
---------------------------------------------------------------------------------------------------
Agustin Santamarina V.   Campos Eliseos 400, Fl. 19   Director              Partner of
                         11000 Mexico City                                  Santamarina y Steta,
                                                                            S.C.
---------------------------------------------------------------------------------------------------
Armando Ortega Gomez     Baja California 200          Secretary of the      General Legal
                         06760 Mexico City            Board                 Director of Grupo
                                                                            Mexico
---------------------------------------------------------------------------------------------------





CUSIP NO. 843611104                                        Page 17 of 23 Pages


                                   Annex III

                                 CONTROLADORA

                       Directors and Executive Officers

3.      DIRECTORS AND EXECUTIVE OFFICERS OF CONTROLADORA. The following table
        sets forth the name, principal business address, title and present
        principal occupation or employment of each director and executive
        officer of Controladora. Each such person is a citizen of Mexico.




-------------------------------------------------------------------------------------------------
         NAME             PRINCIPAL BUSINESS               TITLE           PRINCIPAL OCCUPATION
                                ADDRESS
-------------------------------------------------------------------------------------------------
                                                                 
German Larrea          Baja California 200          President, Chairman   Chairman of the Board
Mota-Velasco           06760 Mexico City            of the Board and      and Chief Executive
                                                    Chief Executive       Officer of Grupo
                                                    Officer               Mexico
-------------------------------------------------------------------------------------------------
Juan Sanchez Navarro   Campos Eliseos 400, Fl. 19   Director              Vice President of
Peon                   11000 Mexico City                                  Grupo Modelo, S.A. de
                                                                          C.V.
-------------------------------------------------------------------------------------------------
Prudencio Lopez        Vasco de Quiroga             Director              President of Sanvica,
Martinez               2121, Fl. 2                                        S.A. de C.V.
                       01210 Mexico City
-------------------------------------------------------------------------------------------------
Juan I. Gallardo       Monte Caucaso 915, Fl. 4     Director              President and
Thurlow                11000 Mexico City                                  Chairman of the Board
                                                                          of Grupo Azucarero de
                                                                          Mexico, S.A. de C.V.
-------------------------------------------------------------------------------------------------
Carlos Giron Peltier   Lamartine 730                Director              Retired
                       11560 Mexico City
-------------------------------------------------------------------------------------------------
Genaro Larrea          2575 East Camelback Road     Director              President of ASARCO
Mota-Velasco           Suite 500
                       Phoenix, Arizona 85016
-------------------------------------------------------------------------------------------------
Agustin Santamarina V. Campos Eliseos 345           Director              Partner of
                       11560 Mexico City                                  Santamarina y Steta,
                                                                          S.C.
-------------------------------------------------------------------------------------------------
Armando Ortega Gomez   Baja California 200          Secretary of the      General Legal
                       06760 Mexico City            Board                 Director of Grupo
                                                                          Mexico
-------------------------------------------------------------------------------------------------





CUSIP NO. 843611104                                          Page 18 of 23 Pages

                                   Annex IV

                                      AMC

                       Directors and Executive Officers

4.      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 except Messrs.
        McAllister, Boylan and O'Neil, who are citizens of the United States.





----------------------------------------------------------------------------------------------------
       NAME              PRINCIPAL BUSINESS                TITLE            PRINCIPAL OCCUPATION
                               ADDRESS
----------------------------------------------------------------------------------------------------
                                                                   
German Larrea            Baja California 200         President, Chairman     Chairman of the Board
Mota-Velasco             06760 Mexico City           of the Board and        and Chief Executive
                                                     Chief Executive         Officer of Grupo
                                                     Officer                 Mexico
----------------------------------------------------------------------------------------------------
Juan Sanchez Navarro     Campos Eliseos 400, Fl. 19  Director                Vice President of
Peon                     11000 Mexico City                                   Grupo Modelo, S.A. de
                                                                             C.V.
----------------------------------------------------------------------------------------------------
Prudencio Lopez          Vasco de Quiroga            Director                President of Sanvica,
Martinez                 2121, Fl. 2                                         S.A. de C.V.
                         01210 Mexico City
----------------------------------------------------------------------------------------------------
Juan I. Gallardo         Monte Caucaso 915, Fl.      Director                Chairman of the Board
Thurlow                  4                                                   of Grupo Azucarero de
                         11000 Mexico City                                   Mexico, S.A. de C.V.
----------------------------------------------------------------------------------------------------
Carlos Giron Peltier     Lamartine 730               Director                Retired
                         11560 Mexico City
----------------------------------------------------------------------------------------------------
Genaro Larrea            2575 East Camelback         Director, President     President of ASARCO
Mota-Velasco             Road,                       and Chief
                         Suite 500                   Commercial
                         Phoenix, Arizona 85016      Officer
----------------------------------------------------------------------------------------------------
Agustin Santamarina V.   Campos Eliseos 345          Director                Partner of
                         11560 Mexico City                                   Santamarina y Steta,
                                                                             S.C.
----------------------------------------------------------------------------------------------------
Daniel Tellechea         Baja California 200         Director, Executive     Administration and
Salido                   06760 Mexico City           Vice President and      Finance President of
                                                     Chief Financial         Grupo Mexico
                                                     Officer
----------------------------------------------------------------------------------------------------
Oscar Gonzalez           Av. Caminos Del Inca        Director                President of Southern
Rocha                    171 Lima, Peru                                      Peru Copper
                                                                             Corporation
----------------------------------------------------------------------------------------------------
Xavier Garcia De         Baja California 200         Director and Chief      President of GMMI
Quevedo Topete           06760 Mexico City           Operations Officer
----------------------------------------------------------------------------------------------------
Alfredo Casar Perez      Bosque de Ciruelos 00       Director                President and
                         11700 Mexico City                                   Managing Director of
                                                                             Ferrocarril Mexicano,
                                                                             S.A. de C.V.
----------------------------------------------------------------------------------------------------



CUSIP NO. 843611104                                                            Page 19 of 23 Pages


----------------------------------------------------------------------------------------------------
Eduardo Gonzalez Gomez   Insurgentes Sur 432         Director                Independent Financial
                         06760 Mexico City                                   Advisor
----------------------------------------------------------------------------------------------------
Genaro Guerrero          1150 N. 7th Avenue          Vice President and      Vice President
Diaz Mercado             Tucson, Arizona 85705       Treasurer               of ASARCO
----------------------------------------------------------------------------------------------------
Ernesto Duran            Baja California 200         Vice President          Corporate Controller
Trinidad                 06760 Mexico City                                   of Grupo Mexico
----------------------------------------------------------------------------------------------------
Rodolfo Rubio            Baja California 200         Vice President,         Environmental
                         06760 Mexico City           Environmental and       Development and
                                                     Technical Services      Research Director of
                                                                             Minera Mexico, S.A.
                                                                             de C.V.
----------------------------------------------------------------------------------------------------
Manuel Ramos Rada        1150 N. 7th Avenue          Vice President, Lead    Vice President, Lead
                         Tucson, Arizona 85705       and Specialty Metals    and Specialty Metals
                                                                             of ASARCO
----------------------------------------------------------------------------------------------------
Douglas E. McAllister    2575 East Camelback         Vice President,         Vice President,
                         Road Suite 500              General Counsel and     General Counsel and
                         Phoenix, Arizona 85016      Secretary               Secretary of ASARCO
----------------------------------------------------------------------------------------------------
Brian P. Boylan          1150 N. 7th Avenue          Vice President, Human   Senior Vice President
                         Tucson, Arizona 85705       Resources               of Legal Affairs and
                                                                             Human Resources of
                                                                             ASARCO
----------------------------------------------------------------------------------------------------
James T. O'Neil, Jr.     1150 N. 7th Avenue          Vice President,         Vice President of
                         Tucson, Arizona 85705       Finance and             Finance and
                                                     Administration          Administration of
                                                                             ASARCO
----------------------------------------------------------------------------------------------------







CUSIP NO. 843611104                                        Page 20 of 23 Pages



                                    Annex V

                                    ASARCO

                       Directors And Executive Officers

5.      DIRECTORS AND EXECUTIVE OFFICERS OF ASARCO. The following table sets
        forth the name, principal business address, title and present
        principal occupation or employment of each director and executive
        officer of ASARCO. Each such person is a citizen of Mexico except
        Messrs. Patton, Frei, Boylan, O'Neil, Miller, Burns, McAllister,
        Aldrich and Morneau, who are citizens of the United States.





-------------------------------------------------------------------------------------------------
       NAME              PRINCIPAL BUSINESS             TITLE            PRINCIPAL OCCUPATION
                               ADDRESS
-------------------------------------------------------------------------------------------------
                                                                
German Larrea            Baja California 200      Director, Chairman of   Director, Chairman of
Mota-Velasco             06760 Mexico City        the Board and Chief     the Board and Chief
                                                  Executive Officer       Executive Officer of
                                                                          Grupo Mexico
-------------------------------------------------------------------------------------------------
Genaro Larrea            2575 East Camelback      Director and President  President of ASARCO
Mota-Velasco             Road Suite 500
                         Phoenix, Arizona 85016
-------------------------------------------------------------------------------------------------
Daniel Tellechea         Baja California 200      Director, Executive     Administration and
Salido                   06760 Mexico City        Vice President and      Finance President of
                                                  Chief Financial         Grupo Mexico
                                                  Officer
-------------------------------------------------------------------------------------------------
Oscar Gonzalez           Av. Caminos Del Inca     Director                President of Southern
Rocha                    171 Lima, Peru                                   Peru Copper
                                                                          Corporation
-------------------------------------------------------------------------------------------------
Xavier Garcia De         Baja California 200      Director and Chief      President of GMMI
Quevedo Topete           06760 Mexico City        Operations Officer
-------------------------------------------------------------------------------------------------
Alfredo Casar Perez      Bosque de Ciruelos 99    Director                President and
                         11700 Mexico City                                Managing Director of
                                                                          Ferrocarril Mexicano,
                                                                          S.A. de C.V.
-------------------------------------------------------------------------------------------------
Manuel Calderon          Baja California 200      Director
Cardenas                 06760 Mexico City
-------------------------------------------------------------------------------------------------
Alberto de la            Boulevard Manuel         Director                Partner of Frank
Parra Zavala             Avila Camacho 24, Fl.7                           Galicia y Robles, S.C.
                         11000 Mexico City
-------------------------------------------------------------------------------------------------
Armando Fausto           Baja California 200      Director                General Legal
Ortega Gomez             06760 Mexico City                                Director of Grupo
                                                                          Mexico
-------------------------------------------------------------------------------------------------
Jock Patton              5430 East Arcadia Lane   Director                ING and GCG Families
                         Phoenix, Arizona 85018                           of Mutual Funds, Lead
                                                                          Trustee, Executive
                                                                          Committee Member, and
                                                                          Valuation Committee
                                                                          Chair
-------------------------------------------------------------------------------------------------





CUSIP NO. 843611104                                                         Page 21 of 23 Pages



--------------------------------------------------------------------------------------------------
Alphonse E.              4480 E. Lafayette Blvd.  Director                Autom Church Supply
Frei                     Phoenix, Arizona 85018                           Co., Phoenix,
                                                                          Arizona, Chief
                                                                          Operating Officer
-------------------------------------------------------------------------------------------------
Brian P. Boylan          1150 N. 7th Avenue       Vice President, Human   Senior Vice President
                         Tucson, Arizona 85705    Resources               of Legal Affairs and
                                                                          Human Resources of
                                                                          ASARCO
-------------------------------------------------------------------------------------------------
James T. O'Neil, Jr.     1150 N. 7th Avenue       Vice President,         Vice President of
                         Tucson, Arizona 85705    Finance and             Finance and
                                                  Administration          Administration of
                                                                          ASARCO
-------------------------------------------------------------------------------------------------
Gary Miller              2575 East Camelback      Vice President,         Vice President,
                         Road Suite 500           Commercial              Commercial of ASARCO
                         Phoenix, Arizona 85016
-------------------------------------------------------------------------------------------------
Manuel F. Ramos          1150 N. 7th Avenue       Vice President,         Vice President,
Rada                     Tucson, Arizona 85705    Metallurgical           Metallurgical
                                                  Operations              Operations of ASARCO
-------------------------------------------------------------------------------------------------
George Burns             1150 N. 7th Avenue       Vice President,         Vice President,
                         Tucson, Arizona 85705    Mining Operations       Mining Operations of
                                                                          ASARCO
-------------------------------------------------------------------------------------------------
Douglas E. McAllister    2575 East Camelback      Vice President,         Vice President,
                         Road Suite 500           General Counsel and     General Counsel and
                         Phoenix, Arizona 85016   Secretary               Secretary of ASARCO
-------------------------------------------------------------------------------------------------
Genaro Guerrero          1150 N. 7th Avenue       Vice President and      Vice President and
Diaz Mercado             Tucson, Arizona 85705    Treasurer               Treasurer of ASARCO
-------------------------------------------------------------------------------------------------
Thomas L. Aldrich        2575 East Camelback      Vice President,         Vice President,
                         Road Suite 500           Environmental Affairs   Environmental Affairs
                         Phoenix, Arizona 85016                           of ASARCO
-------------------------------------------------------------------------------------------------
Ernesto Duran            Baja California 200      Vice President          Corporate Controller
Trinidad                 06760 Mexico City                                of Grupo Mexico
-------------------------------------------------------------------------------------------------
Dennis Morneau           1150 N. 7th Avenue       Controller
                         Tucson, Arizona 85705
-------------------------------------------------------------------------------------------------





CUSIP NO. 843611104                                        Page 22 of 23 Pages



                                   Annex VI

                                     SPHC

                       Directors and Executive Officers

6.      DIRECTORS AND EXECUTIVE OFFICERS OF SPHC. 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. Each such person is a citizen of Mexico.




----------------------------------------------------------------------------------------------------
         NAME              PRINCIPAL BUSINESS                TITLE            PRINCIPAL OCCUPATION
                                 ADDRESS
----------------------------------------------------------------------------------------------------
                                                                    
German Larrea            Baja California 200         Director and President  Director, Chairman of
Mota-Velasco             06760 Mexico City                                   the Board and Chief
                                                                             Executive Officer of
                                                                             Grupo Mexico
----------------------------------------------------------------------------------------------------
Genaro Larrea            2575 East Camelback         Director and Vice       President of ASARCO
Mota-Velasco             Road Suite 500              President
                         Phoenix, Arizona 85016
----------------------------------------------------------------------------------------------------
Daniel Tellechea         Baja California 200         Director, Vice          Administration and
Salido                   06760 Mexico City           President and           Finance President of
                                                     Treasurer               Grupo Mexico
----------------------------------------------------------------------------------------------------
Oscar Gonzalez           Av. Caminos Del Inca        Director                President of Southern
Rocha                    171 Lima, Peru                                      Peru Copper
                                                                             Corporation
----------------------------------------------------------------------------------------------------
Xavier Garcia de         Baja California 200         Director                President of GMMI
Quevedo Topete           06760 Mexico City
----------------------------------------------------------------------------------------------------
Alfredo Casar            Bosque de Ciruelos 99       Director                President and
Perez                    11700 Mexico City                                   Managing Director of
                                                                             Ferrocarril Mexicano,
                                                                             S.A. de C.V.
----------------------------------------------------------------------------------------------------
Alberto de la            Boulevard Manuel            Director                Partner of Frank
Parra Zavala             Avila Camacho 234, Fl. 7                            Galicia y Robles, S.C.
                         11000 Mexico City
----------------------------------------------------------------------------------------------------
Genaro Guerrero          1150 N. 7th Avenue          Vice President          Vice President and
Diaz Mercado             Tucson, Arizona 85705                               Treasurer of ASARCO
----------------------------------------------------------------------------------------------------
Sergio M. Ferrer         Baja California 200         Secretary               Legal Counsel of Minera
de la Barrera            06760 Mexico City                                   Mexico, S.A. de C.V.
----------------------------------------------------------------------------------------------------



CUSIP NO. 843611104                                        Page 23 of 23 Pages


                                Exhibit Index
                                -------------

1.      Form of Stock Purchase Agreement.

2.      Joint Filing Agreement dated July 13, 2001 among the Reporting Persons
        (filed as Exhibit 1 to Amendment No. 5 of the Schedule 13D dated July
        16, 2001 and incorporated by reference herein).



                                   Exhibit 1

                       FORM OF STOCK PURCHASE AGREEMENT




            THIS STOCK PURCHASE AGREEMENT (this "Agreement") is entered into
as of January [ ], 2003 among Americas Mining Corporation, a Delaware
corporation (the "Purchaser"), SPHC II Incorporated ("SPHC II"), a Delaware
corporation wholly-owned by the Purchaser, Southern Peru Holdings Corporation,
a Delaware corporation (the "Seller"), and ASARCO Incorporated, a New Jersey
corporation (the "Parent").

            WHEREAS, the Seller desires to sell, and the Parent desires the
Seller to sell, to the Purchaser 43,348,949 shares of Class A Common Stock,
par value $0.01 per share (the "Shares"), of Southern Peru Copper Corporation,
a Delaware corporation ("SPCC"); and

            WHEREAS, the Purchaser desires to purchase the Shares, upon the
terms and conditions herein specified;

            NOW, THEREFORE, in consideration of the foregoing recitals and of
the mutual promises herein contained, the parties hereby agree as follows:

            1. Purchase and Sale of the Shares.

               (a) Subject to the terms and conditions of this Agreement, at
the Closing (as defined below), the Seller shall, and the Parent shall cause
the Seller to, sell, convey, assign, transfer and deliver to the Purchaser the
Shares, free and clear of all Encumbrances (as defined below), and

               (b) Subject to the terms and conditions of this Agreement, in
consideration of the aforesaid sale, conveyance, assignment, transfer and
delivery to the Purchaser of the Shares, the Purchaser shall make payment in
the amount of $765.0 million for the Shares as follows:

                  (i)   $500 million in cash, subject to Section 1(c);

                  (ii)  a promissory note of the Purchaser in the principal
                        amount of $123.25 million, which shall be paid in
                        seven equal principal installments of $17,607,143.00,
                        payable on each October 31 beginning October 31, 2003,
                        plus accumulated interest at the rate of 7% per annum,
                        substantially in the form attached hereto as Appendix
                        A ("Note A");

                (iii)   a promissory note of the Purchaser in the principal
                        amount of $100 million, which shall be paid in eight
                        equal principal installments of $12.5 million, payable
                        on each May 31 beginning May 31, 2003, plus
                        accumulated interest at the rate of 7% per annum,
                        substantially in the form attached hereto as Appendix
                        B ("Note B"), the performance of such note by the
                        Purchaser to be guaranteed by Grupo Mexico, S.A. de
                        C.V., a Mexican corporation ("Grupo Mexico"); and


                                 Exhibit 1-1



                  (iv)  the cancellation, at the direction and request of the
                        Seller, by the Purchaser and/or its subsidiaries of
                        the $41.75 million principal amount of debt owed to
                        them by the Parent and/or the Seller and any amount
                        owed to the Purchaser by the Parent pursuant to
                        Section 1(c) (collectively, the "Intercompany Debt").

               (c) Anything contained herein to the contrary notwithstanding,
in the event that the Amended Stipulation among the United States, the Seller
and the Parent lodged with the Court (as defined below) on October 11, 2002,
and entered on the docket October 16, 2002, and all prior stipulations among
the United States, the Seller and the Parent in this matter (the
"Stipulation") is not terminated on or before January 31, 2003, the Purchaser
may loan the Parent $50 million (the "Bridge Loan") solely for the purpose of
satisfying, in part, the payment due to the holders of Parent bonds that
mature on February 3, 2003. If such loan is made, (i) the amount of cash
payment referred to in Section 1(b)(i) and payable as provided in Section
2(c)(i) shall be reduced to $450 million and (ii) such Bridge Loan shall be
added to the Intercompany Debt that is cancelled as provided in Section
1(b)(iv) of this Agreement.

            2. The Closing.

               (a) The sale and transfer of the Shares by the Seller to the
Purchaser shall take place at a closing (the "Closing") to be held at the
offices of Sidley Austin Brown & Wood LLP, 787 Seventh Avenue, New York, New
York 10019 one Business Day (as defined below) following the satisfaction
and/or waiver of all conditions to close set forth in Section 6 of this
Agreement, or such other date as may be mutually agreed upon by the Purchaser
and the Seller (the "Closing Date"). All such documents and funds to be
delivered at the Closing shall be deemed delivered simultaneously, and upon
such delivery the sale of the Shares shall be final and irrevocable. As used
herein, the term "Business Day" shall mean a day other than Saturday, Sunday
or any other day on which commercial banks in New York, New York are
authorized or required by law to close.

               (b) At the Closing, the Seller shall, and the Parent shall
cause the Seller to, deliver to the Purchaser

                (i)     a certificate or certificates representing the Shares,
                        each such certificate to be duly and validly endorsed
                        in favor of the Purchaser (or in blank, sufficient to
                        enable the Purchaser to register the Shares in the
                        name of the Purchaser or its designee) or accompanied
                        by a separate stock power duly and validly executed by
                        such Shareholder and otherwise sufficient to vest in
                        Purchaser or its designee good and marketable title to
                        such Shares

                (ii)    a copy of the Consent Decree lodged with the United
                        States District Court for the District of Arizona (the
                        "Court") on January ___, 2003 (the "Consent Decree"),
                        attached hereto as Appendix C; and



                                 Exhibit 1-2




                (iii)   such other documents as are required to be delivered
                        by the Seller to the Purchaser at or prior to the
                        Closing in connection with the transactions
                        contemplated hereby.

               (c) At the Closing, the Purchaser shall deliver to the Seller

                (i)     $500 million, subject to Section 1(c), in immediately
                        available funds by wire transfer to an account
                        designated by the Seller in writing no later than
                        three business days prior to the Closing Date;

                (ii)    Note A and Note B duly and validly executed by the
                        Purchaser;

                (iii)   a guaranty agreement substantially in the form
                        attached hereto as Appendix D (the "Guaranty")
                        guaranteeing the Purchaser's performance under Note B,
                        duly and validly executed by Grupo Mexico;

                (iv)    such document or documents as may be necessary to
                        evidence the cancellation by the Purchaser and/or its
                        subsidiaries of all of the Intercompany Debt,
                        substantially in the form attached hereto as Appendix
                        E (the "Cancellation Documentation"); and

                (v)     an Assignment and Assumption Agreement substantially
                        in the form attached hereto as Appendix F (the
                        "Assignment and Assumption Agreement"), duly and
                        validly executed by the Purchaser assuming all of the
                        Seller's rights and obligations under the Agreement
                        Among Certain Stockholders of SPCC, dated as of
                        January 2, 1996, as amended on June 11, 2001 and as
                        may be amended from time to time thereafter (the
                        "Stockholders' Agreement").

               (d) Upon the Closing, the Seller shall, and the Parent shall
cause the Seller to:

                (i)     pay a dividend comprised of the cash received from the
                        Purchaser pursuant to Section 2(c)(i) to the Parent
                        immediately upon receipt thereof, and the Parent
                        immediately thereupon shall use $450 million of such
                        cash to pay or repay the outstanding indebtedness
                        under the $450,000,000 Revolving Credit Agreement
                        dated as of December 21, 1999, as amended and
                        extended, among the Parent, as Borrower; Grupo Mexico,
                        as Guarantor; the Lenders party thereto and The Chase
                        Manhattan Bank, as Administrative Agent; and



                                 Exhibit 1-3




                (ii)    irrevocably assign to the Parent any and all interest
                        it has in Note B and the Guaranty pursuant to an
                        Irrevocable Assignment and Acknowledgement of
                        Assignment by and among the Parent, the Seller and the
                        Purchaser (the "Parent Assignment"), substantially in
                        the form attached hereto as Appendix G.

               (e) Effective upon Closing, the Parent shall irrevocably assign
any and all interest it has in Note B and the Guaranty, pursuant to an
Irrevocable Assignment and Acknowledgement of Assignment by and among the
Parent, the Environmental Trust (as hereinafter defined), the Purchaser and
Grupo Mexico (the "Environmental Trust Assignment"), substantially in the form
attached hereto as Appendix H, to the ASARCO Trust (the "Environmental Trust")
to be created pursuant to the Consent Decree and the Trust Agreement to be
dated on or about the date the Consent Decree is entered by the Court.

               (f) Effective upon Closing, after the execution of the Parent
Assignment and prior to the execution of the Environmental Trust Assignment,
the Parent shall execute a Security Agreement (the "Security Agreement"),
substantially in the form attached hereto as Appendix I, in favor of the
United States, which provides the United States a security interest in Note B
and the Guaranty to secure the reimbursement of Environmental Response Costs
(as defined in the Consent Decree) at any or all of the Sites (as defined in
the Consent Decree) and the costs of administration of the Environmental
Trust.

               (g) Immediately upon receipt of the Shares, the Purchaser shall
transfer the Shares to SPHC II, as a capital contribution, and SPHC II shall
execute an Assignment and Assumption Agreement in form and substance
substantially similar to the Assignment and Assumption Agreement.

            3.  Rights as a Holder of Shares. Except as otherwise provided
herein, the Purchaser and, upon transfer, SPHC II shall exercise all rights
and privileges and be subject to the restrictions of a holder of Shares as
governed by the charter and by-laws of SPCC in effect from time to time (the
"Organizational Documents") and the Stockholders' Agreement.

            4.  Representations and Warranties of the Parent and the
Seller. The Parent and the Seller, jointly and severally, represent and
warrant to the Purchaser as follows:

               (a) Except as set forth in Schedule 4(a) attached hereto, the
Seller (i) is the sole record and beneficial owner of the Shares and does not
own any other shares of Class A Common Stock or other securities issued by
SPCC or any of its subsidiaries which are not listed on Schedule 4(a); and
(ii) has good and marketable title to the Shares and the certificates
representing the Shares, free and clear of any liens, charges, security
interests, options, claims, mortgages, pledges, proxies, voting trusts or
agreement, obligations, understandings or arrangements or other restrictions
on title or transfer of any nature ("Encumbrances") whatsoever (other than
under the Stockholders' Agreement).

               (b) The stock certificates, stock powers, endorsement,
assignments and other instruments to be executed and delivered by the Seller
to the Purchaser at the Closing will



                                 Exhibit 1-4




be valid and binding obligations of the Seller, enforceable in accordance with
their respective terms, and will effectively vest in the Purchaser good, valid
and marketable title to all the Shares and appurtenant rights to be
transferred to the Purchaser pursuant to and as contemplated by this Agreement
free and clear of all Encumbrances. Upon the sale to the Purchaser, the Shares
will not be subject to any agreement, arrangement or understanding with
respect to the voting, dividend rights or disposition of the Shares (other
than this Agreement, the Organizational Documents and the Stockholders'
Agreement).

               (c) The Seller is a corporation duly organized, validly
existing and in good standing under the laws of the State of Delaware.

               (d) The Parent is a corporation duly organized, validly
existing and in good standing under the laws of the State of New Jersey.

               (e) Each of the Parent and the Seller has full corporate power
and authority to execute and deliver this Agreement, and to consummate the
transactions contemplated hereby. All corporate acts and other proceedings
required to be taken by each of the Parent and the Seller to authorize the
execution, delivery and performance of this Agreement and the consummation of
the transactions contemplated hereby have been duly and properly taken.

               (f) This Agreement has been duly executed and delivered by each
of the Parent and the Seller and constitutes a legal, valid and binding
obligation of each of the Parent and the Seller enforceable against each of
the Parent and the Seller in accordance with its terms. The execution,
delivery and performance of this Agreement and the consummation of the
transactions contemplated hereby will not (i) conflict with or result in any
breach of any provision of the certificate of incorporation, the by-laws or
similar organizational documents of the Parent, the Seller or any of their
Significant Subsidiaries (as defined under Rule 1-02(w) of Regulation S-X of
the Securities Act of 1933, as amended (the "Securities Act"); (ii) require
any filing with, or permit, authorization, consent or approval of, any
Governmental Authority (as defined below) or other Person (as defined below)
(including consents from parties to loans, contracts, leases and other
agreements to which the Parent, the Seller or any of their Significant
Subsidiaries is a party); (iii) require any consent, approval or nature under,
or result in a violation or breach of, or constitute (with or without due
notice or the passage to time or both) a default (or give rise to any right of
termination, amendment, cancellation or acceleration) under, any of the terms,
conditions or provisions of any material agreement applicable to the Parent,
the Seller or any of their Significant Subsidiaries; or (iv) violate any
order, writ, injunction, decree, statute, rule or regulation applicable to the
Parent or the Seller or any of their properties or assets conflict with or
result in any violation of or default under any material contract to which
either the Parent, the Seller or any of their Significant Subsidiaries is a
party. As used herein, the term "Governmental Authority" shall mean any
nation, or government, or any state, regional, local or other political
subdivision thereof. As used herein, the term "Person" shall mean an
individual, partnership, corporation, limited liability company, business
trust, joint stock company, estate, trust, unincorporated association, joint
venture, Governmental Authority or other entity, of whatever nature




                                 Exhibit 1-5




               (g) The sale and transfer of the Shares contemplated hereby is
necessary to eliminate the outstanding secured debt of the Parent that had
originally been due and payable on November 10, 2002.

               (h) Upon the consummation of the transactions contemplated
hereby, the Parent fully intends to continue its operations at least over the
next 12 months following the transfer of the Shares.

               (i) The Parent fully intends to fulfill its environmental
obligations to the United States, States, tribes and pursuant to all private
party civil litigation settlements to the fullest extent of its capabilities.

               (j) The sale and transfer of the Shares contemplated by this
Agreement provides reasonably equivalent value for the Shares. The Parent and
the Seller have received an opinion, including the Valuation Report attached
thereto relating to the valuation of the Shares, of Ernst & Young to that
effect (the "E&Y Opinion"), a copy of which is attached hereto as Appendix J.

            5. Representations and Warranties of the Purchaser. The Purchaser
represents and warrants to the Seller as follows:

               (a) The Purchaser and, upon transfer, SPHC II is acquiring the
Shares for investment for its own account, not as a nominee or agent, and not
with a view to, or for resale in connection with, any distribution thereof in
violation of the Securities Act.

               (b) The Purchaser is a corporation duly organized, validly
existing and in good standing under the laws of the State of Delaware.

               (c) The Purchaser has full corporate power and authority to
execute and deliver this Agreement and to consummate the transactions
contemplated hereby. All corporate acts and other proceedings required to be
taken by the Purchaser to authorize the execution, delivery and performance of
this Agreement and the consummation of the transactions contemplated hereby
have been duly and properly taken.

               (d) This Agreement has been duly executed and delivered by the
Purchaser and constitutes a legal, valid and binding obligation of the
Purchaser, enforceable against the Purchaser in accordance with its terms. The
execution, delivery and performance of this Agreement and the consummation of
the transactions contemplated hereby will not conflict with or result in any
violation of or default under the Purchaser's organizational documents, or
require any consent, approval or authorization of any Governmental Authority,
which would prevent the consummation of the transactions contemplated hereby.

            6. Conditions Precedent to Closing.

               (a) The obligation of the Purchaser to consummate the Closing
is subject to the satisfaction or waiver by the Purchaser, on or prior to the
Closing Date, of each of the following conditions:




                                 Exhibit 1-6




                        (i) The Seller shall have delivered the stock
                certificates and stock power referred to in Section 1(c).

                        (ii) The Purchaser shall have secured funding on terms
                reasonably acceptable to the Purchaser to enable the Purchaser
                to fulfill its obligations hereunder.

                        (iii) The Parent and the Seller shall have duly
                executed and delivered the Assignment and Assumption
                Agreement.

                        (iv) The Parent and the Seller shall have duly
                executed and delivered the Parent Assignment.

                        (v) The Parent shall have duly executed and delivered
                the Security Agreement.

                        (vi) The Parent and the Seller shall have duly
                executed and delivered the Environmental Trust Assignment.

                        (vii) The Consent Decree shall (i) have been entered
                by the Court in form and substance as provided in Appendix C
                or as otherwise approved by the Purchaser in its sole
                discretion and (ii) be in full force and effect and, in the
                sole discretion of the Purchaser, shall not have been stayed,
                modified, reversed or amended in any material manner
                subsequent to entry.

                        (viii) The Purchaser shall have received the E&Y
                Opinion, including the Valuation Report attached thereto. The
                Purchaser shall have received a bring down of such E&Y Opinion
                and Valuation Report, which shall be dated as of a date on or
                reasonably prior to the Closing Date, at the sole discretion
                of the Purchaser.

                        (ix) No action or proceeding shall be pending or
                threatened challenging or seeking to (x) restrain or prohibit
                the purchase and sale of the Shares, the terms of the Final
                Consent Decree or any of the other transactions contemplated
                hereby or thereby or (y) impose material limitations on the
                ability of the Purchaser effectively to exercise full rights
                of ownership of the Shares, including the right to vote the
                Shares, or there shall be any statute, rule, regulation,
                judgment, order or injunction enacted, entered, enforced,
                promulgated or deemed applicable to the transactions
                contemplated by the Agreement, or any other action shall be
                taken by any Governmental Authority that is reasonably likely
                to result, directly or indirectly, in any of the foregoing
                consequences.

                        (x) All material consents of any Person necessary to
                the consummation of the Closing and the other transactions
                contemplated, including consents from parties to loans,
                contracts, leases or other agreements and consents from
                governmental agencies, whether federal, state or local shall
                have been obtained, and a copy of each such consent shall have
                been provided to the Purchaser at or prior to the Closing.



                                 Exhibit 1-7




                        (xi) All of the representations and warranties of the
                Parent and the Seller set forth in this Agreement that are
                qualified as to materiality shall be true and complete and any
                such representations and warranties that are not so qualified
                shall be true and complete in all material respects, in each
                case as of the date of this Agreement and as of the Closing
                Date.

                        (xii) Neither the Parent nor the Seller shall have
                failed to perform in any material respect any material
                obligation or to comply in any material respect with any
                agreement or covenant of the Company to be performed or
                complied with by it under this Agreement.

The foregoing conditions are for the sole benefit of the Purchaser, may be
waived by the Purchaser, in whole or in part, at any time and from time to
time in the sole discretion of the Purchaser. The failure by the Purchaser at
any time to exercise any of the foregoing rights shall not be deemed a waiver
of any such right and each such right shall be deemed an ongoing right which
may be asserted at any time and from time to time.

               (b) The obligation of the Seller to consummate the Closing is
subject to the satisfaction or waiver by the Seller, at or prior to the
Closing, of each of the following conditions:

                        (i) The Purchaser shall have delivered $500 million in
                cash to the Seller, subject to Section 1(c), and shall have
                duly executed and delivered the Cancellation Documentation.

                        (ii) The Purchaser shall have duly executed and
                delivered to the Seller Note A and Note B and Grupo Mexico
                shall have duly executed and delivered the Guaranty.

                        (iii) The Purchaser shall have duly executed and
                delivered the Assignment and Assumption Agreement.

                        (iv) The Consent Decree shall (i) have been entered by
                the Court in form and substance as provided in Appendix C or
                as otherwise approved by the Seller in its sole distretion and
                (ii) be in full force and effect and, in the sole discretion
                of the Seller, shall not have been stayed, modified, reversed
                or amended in any material manner subsequent to entry.

                        (v) No action or proceeding shall be pending or
                threatened challenging or seeking to restrain or prohibit the
                purchase and sale of the Shares, the terms of the Final
                Consent Decree or any of the other transactions contemplated
                hereby.

The foregoing conditions are for the sole benefit of the Seller, may be waived
by the Seller, in whole or in part, at any time and from time to time in the
sole discretion of the Seller. The failure by the Seller at any time to
exercise any of the foregoing rights shall not be deemed a waiver of any such
right and each such right shall be deemed an ongoing right which may be
asserted at any time and from time to time.



                                 Exhibit 1-8




            7. Covenants.

               (a) Payment of SPCC Dividend. If the Closing Date shall occur
prior to receipt by the Parent of the dividend share based on its ownership of
the Shares arising from SPCC operations during the Fourth Quarter of 2002 (the
"Fourth Quarter Dividend"), then the Purchaser shall pay to the Parent any
such Fourth Quarter Dividend that may be received with respect to the Shares.

               (b) Restrictions on Transfer; Legends. All certificates
representing the Shares and, until such time as the Shares are sold in an
offering which is registered under the Securities Act or SPCC shall have
received an opinion of counsel satisfactory in form and content to SPCC that
such registration is not required in connection with a resale (or subsequent
resale) of the Shares, all certificates issued in transfer thereof or
substitution therefor, shall, where applicable, have endorsed thereon the
following (or substantially equivalent) legends:

                (i)     "The securities represented by this certificate have
                        not been registered under the Securities Act of 1933.
                        The shares of Class A Common Stock represented by this
                        certificate are subject to provisions contained in the
                        Agreement Among Certain Stockholders of Southern Peru
                        Copper Corporation dated as of January 2, 1996, as
                        amended by a First Amendment thereto dated June 11,
                        2001, copies of which are on file in the office of the
                        Secretary of Southern Peru Copper Corporation."

                (ii)    Any legend required to be placed thereon by any
                        applicable state securities law.

                (iii)   The legend required by the Stockholders' Agreement
                        that such Shares are subject to the Stockholders'
                        Agreement.

               (c) Confidentiality. Except as otherwise provided herein, the
Parent and the Seller shall, and the Parent shall cause the Seller and the
consultants, advisors and representatives of itself and the Seller to treat
after the date hereof as strictly confidential (unless compelled or threatened
to be compelled to disclose by judicial or administrative process in writing,
in which case the Parent and the Seller shall provide the Purchaser with
copies of such written notice immediately upon receipt of such notice and
shall allow the Purchaser reasonable opportunity to review such notice) all
nonpublic, confidential or proprietary information concerning the Purchaser,
SPCC or their respective affiliates, and the Parent and the Seller shall not,
and the Parent shall cause the Seller and the consultants, advisors and
representatives of itself and the Seller not to, after the date hereof, use
such information to the detriment of the Purchaser, SPCC or their respective
affiliates.

               (d) Subsequent Actions. If at any time after the Closing the
Purchaser shall consider or be advised that any deeds, bills of sale,
instruments of conveyance, assignments, assurances or any other actions or
things are necessary or desirable (i) to vest, perfect or confirm ownership
(of record or otherwise) in the Purchaser, its right, title or interest




                                 Exhibit 1-9




in, to or under any or all of the Shares, (ii) to vest, perfect or confirm
ownership (of record or otherwise) in SPCC any of its rights properties or
assets or (iii) otherwise to carry out this Agreement, the Parent and the
Seller shall execute and deliver all deeds, bills of sale, instruments of
conveyance, powers of attorney, assignments and assurances and take and do all
such other actions and things as may be requested by the Purchaser in order to
vest, perfect or confirm any and all right, title and interest in, to and
under such rights, properties or assets in the Purchaser or SPCC or otherwise
to carry out this Agreement.

               (e) Conduct. The Parent and the Seller agree that, from the
date hereof until the Closing Date they shall not, and the Parent shall not
permit the Seller or any of its other subsidiaries to, take any action that
would impair materially its or their ability to consummate the transactions
contemplated by this Agreement on a timely basis.

               (f) Notices of Certain Events. The Parent and the Seller shall,
and the Parent shall cause the Seller to, promptly notify the Purchaser of:

                (i)     any notice or other communication from any Person
                        alleging that the consent of such Person is or may be
                        required in connection with the transactions
                        contemplated by this Agreement;

                (ii)    any notice or other communication from any
                        Governmental Authority in connection with the
                        transactions contemplated by this Agreement; and

                (iii)   any actions, suits, claims, investigations or
                        proceedings commenced or, to the knowledge of the
                        Parent or the Seller, threatened against, relating to
                        or involving or otherwise affecting the Parent, the
                        Seller or any of its other subsidiaries that relate to
                        the consummation of the transactions contemplated by
                        this Agreement.

               (g) Reasonable Best Efforts. Subject to the terms and
conditions of this Agreement, the parties hereto shall, and the Parent will
cause the Seller to, use its and their reasonable best efforts or take, or
cause to be taken, all actions and to do, or cause to be done, all things
necessary, proper or advisable under applicable laws and regulations to
consummate the transactions contemplated by this Agreement as promptly as
practicable. In furtherance and not in limitation of the foregoing, each of
the parties hereto agrees to make all filings with all Governmental
Authorities required to be made in connection with the transactions
contemplated hereby as promptly as practicable and to supply as promptly as
practicable any additional information and documentary material that may be
requested in connection therewith.

               (h) Certain Filings. The parties hereto shall cooperate with
one another (i) in determining whether any action by or in respect of, or
filing with, any Governmental Authority is required, or any actions, consents,
approvals or waivers are required to be obtained from parties to any material
contracts, in connection with the consummation of the transactions
contemplated by this Agreement; and (ii) in taking such actions or making any
such



                                 Exhibit 1-10



filings, furnishing information required in connection therewith and
seeking timely to obtain any such actions, consents, approvals or waivers.

               (i) Public Announcements. The parties hereto shall consult with
each other before issuing any press release or making any public statement
with respect to this Agreement or the transactions contemplated hereby and,
except as may be required by applicable law or any listing agreement with any
applicable securities exchange, will not issue any such press release or make
any such public statement prior to such consultation.

            8. Termination. This Agreement may be terminated, and the
transactions contemplated hereby abandoned, at any time prior to the Closing
Date:

               (a) By the mutual written consent of the Purchaser and the
Seller.

               (b) By the Purchaser if any Governmental Authority shall have
issued an order, decree or ruling or taken any other action (which order,
decree, ruling or other action the parties hereto shall use their reasonable
efforts to lift), which restrains, enjoins or otherwise prohibits the
acquisition by the Purchaser of all the Shares.

               (c) By the Purchaser if the Closing has not been consummated on
or before 30 days after entry of the Final Consent Decree.

            9. General Provisions.

               (a) No Assignments. Except for a transfer by the Purchaser to a
wholly owned subsidiary, none of the parties hereto shall transfer, assign or
encumber any of its rights, privileges, duties or obligations under this
Agreement without the prior written consent of each other party, and any
attempt to so transfer, assign or encumber shall be void.

               (b) Notices. All notices and other communications which are
required or permitted to be given pursuant to the terms of this Agreement
shall be in writing and shall be sufficiently given (i) if personally
delivered, (ii) if sent by telex or facsimile, provided that a transmission
confirmation is received by the sender (with a confirming copy sent by a
leading international express courier), or (iii) upon receipt, if sent by
registered or certified mail, postage paid return receipt requested, in any
case addressed as follows:

                              If to the Purchaser, to:

                              Americas Mining Corporation
                              2575 East Camelback Road
                              Suite 500
                              Phoenix, Arizona 85016
                              Attention: Chief Legal Officer



                                 Exhibit 1-11




                              If to SPHC II, to:

                              SPHC II Incorporated
                              Baja California 200
                              Colonia Roma Sur
                              06760 Mexico City, Mexico
                              Attention: Chief Legal Officer

                              If to the Seller, to:

                              Southern Peru Holdings Corporation
                              Baja California 200
                              Colonia Roma Sur
                              06760 Mexico City, Mexico
                              Attention: Chief Legal Officer

                              If to the Parent, to:

                              ASARCO Incorporated
                              2575 East Camelback Road
                              Suite 500
                              Phoenix, Arizona 85016
                              Attention: Chief Legal Officer

The address of a party, for the purposes of this Section 9(b), may be changed
by giving written notice to the other parties of such change in the manner
provided herein for giving notice. Unless and until such written notice is
received, the addresses as provided herein shall be deemed to continue in
effect for all purposes hereunder.

               (c) Choice of Law. This Agreement shall be governed by and
construed in accordance with the internal laws of the State of New York
without giving effect to any choice or conflict of law provision or rule
(whether of the State of New York or any other jurisdiction) that would cause
the application of laws of any jurisdiction other than the State of New York.

               (d) Jurisdiction. The parties to this Agreement agree that any
suit, action or proceeding arising out of, or with respect to, this Agreement
or any judgment entered by any court in respect thereof may be brought (i) in
the action styled United States v. ASARCO, Inc. and Southern Peru Holdings
Corporation, No. CIV-02-2079-PHX-RCB in the Court or (ii) in the courts of the
State of New York in New York County or in the U.S. District Court for the
Southern District of New York, and the parties hereto hereby irrevocably
accept the non-exclusive personal jurisdiction of the Court or those courts
for the purpose of any suit, action or proceeding. In addition, the parties
hereto each hereby irrevocably waives, to the fullest extent permitted by law,
any objection which it may now or hereafter have to the laying of venue of any
suit, action or proceeding arising out of or relating to this Agreement or any
judgment entered by any court in respect thereof brought in the Court or in
any court of the State of New York in New York County or in the U.S. District
Court for the Southern District of New York, and each



                                 Exhibit 1-12




hereby further irrevocably waives any claim that any suit, action or
proceedings brought in the Court or any such other court has been brought in
an inconvenient forum.

               (e) Severability. The parties hereto agree that the terms and
provisions in this Agreement are reasonable and shall be binding and
enforceable in accordance with the terms hereof and, in any event, that the
terms and provisions of this Agreement shall be enforced to the fullest extent
permissible under law. In the event that any term or provision of this
Agreement shall for any reason be adjudged to be unenforceable or invalid,
then such unenforceable or invalid term or provision shall not affect the
enforceability or validity of the remaining terms and provisions of this
Agreement, and the parties hereto hereby agree to replace such unenforceable
or invalid term or provision with an enforceable and valid arrangement which,
in its effect, shall be as close as possible to the unenforceable or invalid
term or provision.

               (f) Counterparts. This Agreement may be executed in two or more
original or facsimile counterparts, each of which shall be deemed an original,
but which together shall constitute one and the same instrument.

               (g) Modification, Amendment and Waiver; Benefit. This Agreement
may not be modified, amended, supplemented, canceled or discharged, except by
written instrument executed by all parties. The failure or partial failure at
any time to enforce or exercise any of the provisions of this Agreement shall
in no way be construed as a waiver of such provisions and shall not affect the
right of any party thereafter to enforce each and every provision hereof in
accordance with its terms. No provision of this Agreement is intended to
confer any rights, benefits, remedies, obligations or liabilities hereunder
upon any Person other than the parties hereto and their respective successors
and assigns.

               (h) Entire Agreement. This Agreement, taken in conjunction with
Note A, Note B, the Guaranty, the Cancellation Documentation, the Assignment
and Assumption Agreement, the Parent Assignment, the Environmental Trust
Assignment and the Stockholders' Agreement constitutes the entire agreement of
the parties with respect to the subject matter hereof.

               (i) Headings. The headings of the sections and paragraphs of
this Agreement have been inserted for convenience of reference only and do not
constitute a part of this Agreement.

               (j) Expenses. Whether or not the sale and purchase of the
Shares shall be consummated, each party hereto shall pay its own expenses
incident to preparing for, entering into and carrying out this Agreement and
the transactions contemplated hereby.

               (k) Survival of Representations and Warranties. Each of the
representations and warranties of the Parent and Seller in this Agreement or
in any schedule, instrument or other document delivered pursuant to this
Agreement shall survive the Closing Date and shall continue in force
thereafter. The representations and warranties of the Purchaser shall not
survive the Closing Date.



                                 Exhibit 1-13




            IN WITNESS WHEREOF, the parties hereto have caused this Agreement
to be duly executed by their respective officers, partners or other
representatives, thereunto duly authorized, all as of the day and year first
above written.

                                    AMERICAS MINING CORPORATION


                                    By:
                                         -------------------------------------
                                         Name:
                                         Title:



                                    SPHC II INCORPORATED


                                    By:
                                         -------------------------------------
                                         Name:
                                         Title:



                                    SOUTHERN PERU HOLDINGS CORPORATION


                                    By:
                                         -------------------------------------
                                         Name:
                                         Title:



                                    ASARCO INCORPORATED


                                    By:
                                         -------------------------------------
                                         Name:
                                         Title:




                                 Exhibit 1-14