ASARCO INC
SC 14D9/A, 1999-09-10
PRIMARY SMELTING & REFINING OF NONFERROUS METALS
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<PAGE>

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

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


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


                                SCHEDULE 14D-9/A
                               (Amendment No. 1)

                     SOLICITATION/RECOMMENDATION STATEMENT
                      PURSUANT TO SECTION 14(D)(4) OF THE
                        SECURITIES EXCHANGE ACT OF 1934


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


                              ASARCO Incorporated
                           (Name of Subject Company)


                              ASARCO Incorporated
                      (Name of Person(s) Filing Statement)


                      Common Stock, No Par Value Per Share
                         (Title of Class of Securities)


                                   043413103
                     (CUSIP Number of Class of Securities)


                             Francis R. McAllister
                      Chairman and Chief Executive Officer
                              ASARCO Incorporated
                                180 Maiden Lane
                            New York, New York 10038
                                 (212) 510-2000
                 (Name, address and telephone number of person
               authorized to receive notice and communications on
                   behalf of the person(s) filing statement).


                                With Copies to:
                               J. Michael Schell
                               Margaret L. Wolff
                    Skadden, Arps, Slate, Meagher & Flom LLP
                                919 Third Avenue
                            New York, New York 10022
                                 (212) 735-3000

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>

  This Amendment No. 1 to the Solicitation/Recommendation Statement on
Schedule 14D-9 relates to the exchange offer for all of the outstanding shares
of ASARCO Common Stock which is described in a Tender Offer Statement on
Schedule 14D-1 of Phelps Dodge Corporation, a New York corporation ("Phelps
Dodge"), filed with the Securities and Exchange Commission on September 3,
1999, which incorporates the prospectus of Phelps Dodge contained in the
Registration Statement on Form S-4 of Phelps Dodge filed with the Commission
on August 27, 1999, as amended by Amendment No. 1 thereto filed with the
Commission on September 1, 1999 and Amendment No. 2 thereto filed with the
Commission on September 2, 1999.

Item 9 Material to be Filed as Exhibits.

  Item 9 is hereby amended and supplemented by adding the following Exhibits:

Exhibit 18.Letter to Stockholders of ASARCO and Cyprus Amax.

Exhibit 19.Investor Presentation of ASARCO and Cyprus Amax.

Exhibit 20.Advertisement published in The New York Times on September 10,
1999.

                                       2
<PAGE>

                                   SIGNATURE

  After reasonable inquiry and to the best of its knowledge and belief, the
undersigned certifies that the information set forth in this statement is
true, complete and correct.

                                          ASARCO INCORPORATED

                                          By /s/ Francis R. McAllister
                                            -----------------------------------
                                            Name: Francis R. McAllister
                                            Title: Chairman and
                                                 Chief Executive Officer

Dated: September 10, 1999

                                       3

<PAGE>

                                                                   EXHIBIT 99.18

AN IMPORTANT MESSAGE

                           THE ASARCO CYPRUS MERGER:
                   THE ONLY TRANSACTION THAT YOU CAN COUNT ON
                                TO DELIVER VALUE

Dear Cyprus Amax and Asarco Shareholders:

The Boards of Directors of Cyprus Amax and Asarco unanimously recommend that
shareholders VOTE FOR the proposed merger of Cyprus Amax and Asarco on
September 30. The Boards and managements of both companies are convinced that
only this transaction delivers to you a fair share of the value of combining
our two companies. The Boards, assisted by their independent financial and
legal advisors, thoroughly reviewed Phelps Dodge's exchange offers and
determined they are inadequate and not in the best interests of Cyprus Amax and
Asarco shareholders. The full details of these determinations are contained in
the Schedule 14D-9 which is being mailed to you separately.

In recommending the Asarco Cyprus merger, the Boards view shareholders as
having the opportunity:

  . To be the owners of the largest publicly-traded copper company in the
    world with an estimated cash cost of 50 cents per pound;

  . To benefit from 100% of an estimated $275 million of annual savings
    achievable from our combination;

  . To receive an immediate special cash payment of $5.00 per Asarco Cyprus
    share, following completion of the proposed merger on September 30.

In short, the new Asarco Cyprus will be a premier copper investment.

In the 3-way deal proposed by Phelps Dodge, we believe Asarco Cyprus would
bring:

               .57% of production       .60% of the copper margin
               .61% of reserves         .92% of the synergies
               .Lower cash costs        .91% of the cash
               .4 of the 5 lowest cost mines

  In sharp contrast, Phelps Dodge wants to take a substantial percentage of
  your value for its own shareholders, giving Asarco Cyprus shareholders only
  43% ownership of the 3-way enterprise

  Phelps Dodge calls the Asarco Cyprus offer requesting an ownership interest
  of just 50% of the value "unreasonable." We disagree, it is eminently fair.

Phelps Dodge is trying to coerce Cyprus Amax and Asarco shareholders into doing
a transaction that is not in your best interests. It is unwilling to give you
fair value. It is unwilling to commit to doing a transaction if shareholders
approve the Asarco Cyprus merger on September 30. And it is unwilling to
present you with a competitive deal ready for completion.

Compare the certainties of the proposed Asarco Cyprus merger with the
uncertainties of Phelps Dodge's offer:


            Asarco Cyprus                             Phelps Dodge


 .  September 30 shareholder vote        .   No Phelps Dodge shareholder vote
                                             by September 30


 .  All regulatory consents obtained     .   Unknown closing date, if ever


 .  Fully negotiated and effective       .   Uncertain timing of antitrust
    merger agreement                         clearance


                                         .   Exchange offer is subject to
                                             numerous conditions


                                         .   No form of merger agreement
                                             proposed

<PAGE>

The only transaction Cyprus Amax and Asarco shareholders can count on to
realize value is the Asarco Cyprus merger. The only transaction Cyprus Amax
and Asarco shareholders can count on to be completed by September 30 is the
Asarco Cyprus merger.

Cyprus Amax and Asarco shareholders need not be stampeded by Phelps Dodge or
its self-serving agenda.

VOTE FOR the Asarco Cyprus merger on September 30. Despite what Phelps Dodge
would like you to believe, it is the only transaction you can count on.

To VOTE FOR the Asarco Cyprus merger transaction, please sign and return the
WHITE proxy card.

On behalf of the Boards of Directors and all of us at Cyprus Amax and Asarco,
we thank you for your support.

Sincerely,

/s/ Francis R. McAllister                /s/ Milton H. Ward
Francis R. McAllister,                   Milton H. Ward,
Chairman and Chief Executive Officer     Chairman, Chief Executive Officer and
ASARCO Incorporated                      President
                                         Cyprus Amax Minerals Company

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

- ----------------------------------           ----------------------------------
                                   IMPORTANT

   If you need assistance or information, please call our proxy solicitors:

         Asarco Shareholders:                 Cyprus Amax Shareholders:


               [LOGO]                                   [LOGO]
           MORROW & CO. INC.                           GEORGESON
                                                      SHAREHOLDER
                                                   COMMUNICATIONS INC


           at (800) 662-5200                      at (800) 223-2064




<PAGE>

                                                                   EXHIBIT 99.19

ASARCO Incorporated                                     [LOGO] CYPRUS AMAX
                                                               Minerals Company










[PHOTOGRAPH OF TOQUEPALA]                               [PHOTOGRAPH OF EL ABRA]

Toquepala                                                               El Abra


                                   INVESTOR

                                 PRESENTATION

                                September 1999


[PHOTOGRAPH OF CUAJONE]                             [PHOTOGRAPH OF CERRO VERDE]

Cuajone                                                             Cerro Verde
<PAGE>

ASARCO CYPRUS MERGER


 .  Merger of Equals

 .  Exchange of Shares
   -  0.765 Share of Asarco Cyprus for Each Cyprus Amax Share
   -  1.000 Share of Asarco Cyprus for Each Asarco Share

 .  Post Merger Ownership
   -  Cyprus Amax Common Shareholders Own 63.5%
   -  Asarco Shareholders Own 36.5%

 .  Cash Payment of $5.00 Per Asarco Cyprus Share After Closing

 .  Shareholder Vote September 30

 .

 .
                                                                              2
<PAGE>

ASARCO CYPRUS MERGER


 .  $5.00 Cash Payment to Shareholders on Completion of Merger
   -  Immediate Value to Shareholders
   -  Focuses Attention on Underlying Value of Merger

 .  Drop Takeover Defenses - 90 Days Post Merger
   -  Disarm Rights Plan
   -  No Change in Control in New Employment Contracts

 .  Pursue Sale of Non-Core Businesses - $1 Billion Value Including:
   -  Specialty Chemical Business
   -  Kinross Gold
   -  Australian Coal

 .  Confident of Achieving $275 Million in Synergies/Rationalization Benefits

 .
                                                                              3
<PAGE>

RE-RATING OF ASARCO CYPRUS


                                        Asarco Cyprus  Phelps Dodge
                                        -------------  ------------

Market Capitalization*                  $2.4 Billion   $3.5 Billion

Pounds of Production                     2.0 Billion    1.6 Billion

Equity Value Per

    Pound Produced                      $1.17          $2.24


        -  Opportunity For Re-Rating of Asarco Cyprus

        -  Asarco Cyprus Merger Provides Greater Potential
           for Growth in Shareholder Value


* Common Stock Price As of 8/20/99

                                                                               4
<PAGE>

ASARCO CYPRUS VS. PHELPS DODGE


(Selected Statistics)                   Asarco      Phelps   AC share of
                                        Cyprus      Dodge      AC & PD
                                        ------      ------   ------------

1999 (E) Production (Million Lbs.)       2,055       1,551            57%

12/98 Copper Reserves (Billion Lbs.)        62          40            61%

Cash Costs (cents/Lb.)                    0.50        0.54            55%

Low Cost Mines                               4           1            80%

Copper Margin (@ 80cents)($ Millions)      617         403            60%

Synergies ($ Millions)                     275         300            92%

Cash                                    $1.4 B      $144 M            91%

                                                                               5
<PAGE>

Beneficial Copper Production Cash Cost Profile



        [Bar graph depicting beneficial copper production cash cost
         profile, with figures approximated, for Cyprus Amax: El Abra (cash
         cost: 37 cents per pound; copper production: .250 billion pounds),
         Cerro Verde (48 cents; .100 billion pounds), Bagdad (67 cents; .225
         billion pounds), Miami (68 cents; .190 billion pounds), Sierrita (71
         cents; .250 billion pounds); for Asarco: Silver Bell (49 cents; .025
         billion pounds), SPCC (51 cents; .500 billion pounds) , MRI (70 cents;
         .035 billion pounds), Mission (73 cents; .250 billion pounds), Ray (74
         cents; .260 billion pounds); for Phelps Dodge: Candelaria (50 cents;
         .325 billion pounds), Morenci (55 cents; .900 billion pounds), Chino
         (63 cents; .200 billion pounds), Tyrone (64 cents; .200 billion
         pounds). Measured in cash cost (cents per pound) against copper
         production (billion pounds).]


      Source: Phelps Dodge - Brook Hunt, modified 1999 EST

                                                                               6
<PAGE>

MERGER COST SAVINGS PROJECTIONS

($ millions, except per share)
                                                      Asarco       Phelps
                                                      Cyprus        Dodge
                                                     --------      -------
Administration                                          $  50        $  85

Purchasing/Operations                                      50           60

Other                                                      25           55

Rationalization                                            75           75
                                                     --------      -------
 Subtotal Cash                                            200          275

Exploration Adjustment                                      -          (40)
                                                     --------      -------
 Adjusted Cash                                            200          235

Accounting Benefit                                        75*           65
                                                     --------      -------
  Total Pretax                                            275          300


Contribution                                              92%           8%


Per Share (after tax)                                   $1.85


Anticipated Market Value Impact ($/Share)     $11.33 - $13.76


*Based on Stock Price of $18.00 (AR) at Proxy Date (8/20/99)

                                                                               7
<PAGE>

COST SAVING ACTIONS


Examples of Cost Savings                                           (In Millions)

Administration                                                         $50.0
      Consolidate Offices
      Eliminate 170 Positions
      Eliminate Duplicate Expenses
      Eliminate Exploration Duplicate Activities

Purchasing                                                              50.0
      Leverage Commodity Purchases
      Reduce Warehouse Inventory
      Logistics

Operating Best Practices                                                25.0 +
      Haul Truck Load Factor Optimization
      Cascade Leaching
      In-House Fabrication of Starter Sheets
      Converter Maintenance and Scheduling
      Minimization of Revert Generation
      Crusher Maintenance and Practices
      Throughput and Recovery Optimization

Rationalization                                                         75.0
      Mine Plan Changes at Mission and Ray

                                                                               8
<PAGE>

HISTORICAL TRADING VALUES OF SELECTED COPPER EQUITIES



        [Chart depicting relative trading values of Cyprus Amax,
         ASARCO, and Phelps Dodge, during the period between
         January 1 and July 14. Base value assumption: Cyprus - 10.000;
         Asarco - 15.125; Phelps - 50.875.]

                                                                               9
<PAGE>

HISTORICAL TRADING VALUES OF SELECTED COPPER EQUITIES



        [Chart depicting relative trading values of Cyprus Amax,
         ASARCO, and Phelps Dodge, during the period between
         July 14 and August 19. Base value assumption: Cyprus - 13.938;
         ASARCO - 19.000; Phelps - 66.438.]
                                                                              10
<PAGE>

ASARCO CYPRUS REDUCED CASH COSTS



        [Bar graph depicting cash costs, measured by cents per pound,
         for each of Cyprus Amax and Asarco for 1996 (72 cents for Cyprus Amax,
         69 cents for Asarco), 1997 (63 cents for Cyprus Amax, 69 cents for
         Asarco), 1998 (56 cents for Cyprus Amax, 64 cents for Asarco), and
         1999(E) (50 cents for Cyprus Amax, 60 cents for Asarco), and for Asarco
         Cyprus combined for 2001(E) (50 cents).]
                                                                              11
<PAGE>

ASARCO CYPRUS MERGER



 .  World's Largest Publicly Traded Copper Company

 .  Strong Management

 .  Global Presence With Portfolio of World Class Properties

 .  Low Costs With Excellent Potential For Additional Reductions

 .  Accretive to Shareholders

 .  $875 Million in Cash and $1 Billion Plus in Other Sources of Liquidity

 .  Pipeline of Growth Projects

 .  Increased Shareholder Liquidity

                                                                              12
<PAGE>

ASARCO CYPRUS MERGER



 .  Asarco Cyprus Merger Creates Greater Value
   Opportunity for Shareholders

 .  Merger Captures Benefits and Provides Immediate Value

 .  Merger is Best Value for Asarco and Cyprus Shareholders

 .  Moving Ahead With Merger

 .  Expect Equity Market to Re-Rate Share Price

                                                                              13
<PAGE>

ASARCO CYPRUS - WORLD LEADER IN COPPER

- ------------------------------------          ---------------------------------
Contained Copper Reserves - 12/31/98          1998 Copper Beneficial Production
- ------------------------------------          ---------------------------------

[Bar graph depicting, at 12/31/98,            [Bar graph depicting 1998 copper
 contained copper reserves, measured           beneficial production, measured
 in billion pounds for CYM & AR (62),          in million pounds, for CYM & AR
 Rio Tinto (56), BHP Copper (55),              (1968), BHP Copper (1929), Rio
 FCX (49), Phelps (40), GM (39),               Tinto (1792), Phelps (1748), FCX
 AR (37), Antofagasta (28), SPC (26),          (1479), AR (1025), CYM (965), MIM
 CYM (25), Rio Algoim (12), MIM (9).]          (784), GM (760), SPC (666),
                                               Antofagasta (563), Rio Algoim
                                               (379).]


Source: Brook Hunt


                                                                              14
<PAGE>

ASARCO Incorporated                                     [LOGO] CYPRUS AMAX
                                                               Minerals Company





                             Additional Information
<PAGE>

MERGER OBJECTIVES




 . Become Low Cost Copper Producer:
  $0.50 Per Pound Cash Cost

  -  Earnings Breakeven: Less Than $0.65 Per Pound Copper Price

  -  Generate Substantial Cash Flow
        .  $750 Million EBITDA ($0.80 Copper, $3.00 Molybdenum) After Sale of
           Non-Core Businesses

                                                                              16
<PAGE>

MERGER OBJECTIVES

 .  $275 Million ($1.85/share) in Annual Synergies, Cost Savings, and
   Rationalization Benefits



   -  Obtain Significant Operating Efficiencies

   -  Achieve Purchasing Savings

   -  Reduce Administrative Costs Through Consolidation and Closures

   -  Employ Best Practices of Two Strong Operators
       . Quest 21 / AMS Process Management Systems

   -  Retain Strongest Managers

                                                                              17
<PAGE>

MERGER OBJECTIVES


 .  $275 Million ($1.85/share) in Annual Synergies, Cost Savings, and
   Rationalization Benefits

   -  Cash Cost Savings to Generate $125 Million Annually ($0.84/Share by 2001)

   -  Benefits of Purchase Accounting to Generate $75 million Annually
      ($0.50/share)

   -  Cost Savings of $75 Million From Production Rationalization During Periods
      of Low Prices

   -  Maintain Limited Exploration Program

                                                                              18
<PAGE>

MERGER OBJECTIVES


 .  Enhance Liquidity and Financial Flexibility

   -  Cash of $875 Million After $5.00 Per Share Cash Payment

   -  Net Debt to Capital of 41.3% (net of cash)

   -  Sale of Non-Core Businesses - $1 Billion Value

   -  Net Debt to Capital of 25.5% (net of cash) After Sales

 .  Realize Immediate Value for Shareholders

   -  Earnings and Cash Flow Accretive

   -  Increase Trading Liquidity

   -  Synergies Should Cause Market Re-Rating of Asarco Cyprus Shares

 .  Asarco and Cyprus Shareholders Realize 100% of Synergy Benefits

                                                                              19
<PAGE>

VALUE OF SYNERGIES


 .

 .  Merger Gives Asarco and Cyprus Shareholders 100% of Synergies

 .

 .  Phelps Dodge Proposal Takes 57% of Synergies for Their Shareholders

                                                                              20
<PAGE>

MERGER OBJECTIVES


 .  Become the World's Largest Publicly-Traded Copper Company

 .
   -  Highly Focused, High Quality Copper/Moly Producer

   -  2 Billion Pounds of Annual Copper Production

   -  62 Billion Pounds of Reserves

   -  World's Largest Molybdenum Producer

   -  Significant Inventory of Future Development Projects

                                                                              21
<PAGE>

                           NORTH AMERICAN OPERATIONS


        [Map of United States and more detailed map of Arizona,
         indicating locations of mines, smelters, and refineries.]


                                                                             22
<PAGE>

                           SOUTH AMERICA OPERATIONS


        [Map of South America and more detailed map of Peru and Chile,
         indicating locations of mines, smelters, and refineries.]


                                                                             23
<PAGE>

1998 COMBINED MINE PRODUCTION

  In Millions of Lbs.




                          Sulfide  SX-EW  Total
                          -------  -----  -----
North America                 919    362  1,281

South America                 300    387    687
                              ---    ---    ---

Total                       1,219    749  1,968

                                                                              24
<PAGE>

ASARCO CYPRUS MANAGEMENT


 .  Key Cyprus Amax Achievements

   -  Implemented Quest 21

   -  Lowered Copper Costs by 21 cents Per Pound

   -  Reduced Employment at Continuing Operations by 28%

   -  Increased Production Per Employee by 44%

   -  Consolidated Moly Operations

   -  Focused Strategy:  Sold Lithium and Coal; Merged Amax Gold

   -  Successful Development and Startups of El Abra, Cerro Verde

   -  Reduced Corporate Overhead Expense by 35%

   -  Transformed from Coal Company to Focused Low Cost Metals Company

                                                                              25
<PAGE>

ASARCO CYPRUS MANAGEMENT



 .  Focused Strategy to Realize Shareholder Value

 .  Key Asarco Achievements

   -  Expanded Low Cost SX-EW - SPCC, Silver Bell, Ray

   -  Expanded Low Cost Sulfide - SPCC, Cuajone

   -  Acquired Controlling Interest in Low Cost SPCC

   -  Reduced Cash Cost $0.14 per pound

   -  Assets Disposals of $825 Million

   -  Implemented AMS Process Management System

   -  Transformed From Custom Smelter and Refiner to Focused Low Cost Copper and
      Specialty Chemicals Company

                                                                              26
<PAGE>

ASARCO Incorporated                                     [LOGO] CYPRUS AMAX
                                                               Minerals Company





                               Financial Profile
<PAGE>

ASARCO CYPRUS BALANCE SHEET



(In millions)

                                            Pro-Forma         Pro-Forma

                                            $5 Cash Payment   for Asset Sales
                                            ----------------  ----------------

Total Assets                                          $7,624            $7,592

Total Cash and Marketable Securities                     878             1,878

Total Debt and Capital Lease Obligations               2,863             2,863

Total Shareholders' Equity                             2,262             2,329



Book Value Per Common Share                           $18.61            $19.22

Total Debt to Capital                                   50.4%             49.8%

Total Debt to Capital, Net of Cash                      41.3%             25.5%


                                                                              28
<PAGE>

ASARCO CYPRUS NON-COPPER ASSET VALUES



       Specialty Chemicals

       Cyprus Australia Coal

       Kinross Gold (30% Interest)

       Grupo Mexico Shares ($79 Million Value)

       Other Non-Core Assets



       Estimated Value - $1 Billion Plus

                                                                              29
<PAGE>

ASARCO CYPRUS CAPITAL EXPENDITURES



        [Bar graph depicting Asarco Cyprus Capital Expenditures,
         in millions of dollars, excluding SPCC, for 1997 (529),
         1998(340), 1999(E)(303), 2000(E)(257).]



        .  Major Projects Completed

        .  Capital Requirements at Reasonable Levels Going Forward

                                                                              30
<PAGE>

SOUTHERN PERU CAPITAL EXPENDITURES



        [Bar graph depicting Southern Peru Capital Expenditures,
         in millions of dollars, for 1997(184), 1998(259),
         1999(E)(255), 2000(E)(276).]



                             . Financing in Place


                                                                              31

<PAGE>

                                                                   EXHIBIT 99.20


[ASARCO Logo]                                [Cyprus Amax Minerals Company Logo]


ATTENTION ASARCO AND CYPRUS AMAX SHAREHOLDERS:


                           THE ASARCO CYPRUS MERGER:
                         THE ONLY DEAL YOU CAN COUNT ON
                                TO DELIVER VALUE


The proposed Asarco Cyprus merger is the only transaction that you can count on
                                         ----
to deliver value.  It is the only transaction that you can count on to be
                             ----
completed.

Phelps Dodge wants you to give up much of what you would realize in an Asarco
Cyprus merger to Phelps Dodge's shareholders through Phelps Dodge's unsolicited
hostile exchange offers.  And, Phelps Dodge can't even assure you that it can
complete its transaction.

Compare the certainties of the proposed Asarco Cyprus merger with the
uncertainties of Phelps Dodge:


<TABLE>
<CAPTION>
          ASARCO CYPRUS                                    PHELPS DODGE
<S>                                          <C>
 .  September 30 shareholder vote             .  No Phelps Dodge shareholder vote by
 .  All regulatory consents obtained             September 30
 .  Fully negotiated and effective merger     .  Uncertain timing of antitrust clearance
   agreement                                 .  Exchange offer subject to numerous
                                                conditions
                                             .  Unknown closing date, if ever
                                             .  No form of merger agreement proposed
</TABLE>

Ask yourself:

1.  Why has Phelps Dodge not accepted Asarco Cyprus' terms of August 25, 1999?

    Is it because Phelps Dodge does not want to give Asarco and Cyprus Amax
    shareholders a fair ownership interest in the enterprise based upon their
    contribution?

2.  Why is Phelps Dodge threatening to walk away if shareholders vote in favor
    of the transaction?

    Is it because they don't want to pay for your fair share of the value
    created by the Asarco Cyprus merger?

3.  Why is Phelps Dodge bringing lawsuits in New Jersey and Delaware to prevent
    shareholders from voting on the Asarco Cyprus deal?
<PAGE>

    Is it because they are unprepared to present you with a competitive deal
    ready for completion?

          Asarco and Cyprus Amax shareholders need not be stampeded
                    by Phelps Dodge's self-serving agenda.

Shareholder approval of the Asarco Cyprus merger on September 30 means you will:
  .  Receive an immediate cash payment of $5.00 per share
  .  Be the owners of the largest publicly-traded copper company in the world
     with an estimated cash cost of 50 cents per pound
  .  Benefit from 100% of an estimated $275 million of annual savings achievable
     from our combination


        VOTE FOR THE PROPOSED ASARCO CYPRUS TRANSACTION ON SEPTEMBER 30
             ---

              Despite what Phelps Dodge would like you to believe:
                  It is the only transaction you can count on.

         We urge you to sign, date and mail the WHITE proxy card today.
                                                -----


/s/ Francis R. McAllister                       /s/ Milton H. Ward
Francis R. McAllister                           Milton H. Ward
Chairman and Chief Executive Officer            Chairman, Chief Executive
ASARCO Incorporated                             Officer and President
                                                Cyprus Amax Minerals Company


                                   IMPORTANT


    If you need assistance or information, please call our proxy solicitors:

     Asarco Shareholders:                      Cyprus Amax Shareholders:
      MORROW & CO., INC.                         GEORGESON SHAREHOLDER
      at (800) 662-5200                           COMMUNICATIONS INC.
or CHRIS SCHULTZ, Treasurer, Asarco                at (800) 223-2064
      at (212) 510-2329                     or JOHN TARABA, VP and Controller,
                                                     Cyprus Amax
                                                   at (303) 643-5244



                                      -2-


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