Document:

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                                                                   Exhibit 10.13

                              LSI LOGIC CORPORATION
                          EMPLOYEE STOCK PURCHASE PLAN
                              AMENDED AND RESTATED

        The following constitutes the provisions of the Employee Stock Purchase
Plan (the "Plan") of LSI Logic Corporation amended and restated effective March
31, 1999.

1. PURPOSE. The purpose of the Plan is to provide employees of the Company and
its Designated Subsidiaries with an opportunity to purchase Common Stock of the
Company through accumulated payroll deductions. It is the intention of the
Company that the Plan qualify as an "Employee Stock Purchase Plan" under Section
423 of the Internal Revenue Code of 1986, as amended. The provisions of the Plan
shall, accordingly, be construed so as to extend and limit participation in a
manner consistent with the requirements of that section of the Code.

2. DEFINITIONS.

        (a) "Board" means the Board of Directors of the Company, or to the
extent authorized by the Board, a Committee of the Board.

        (b) "Code" means the Internal Revenue Code of 1986, as amended.

        (c) "Common Stock" means the common stock of the Company.

        (d) "Company" means LSI Logic Corporation and any Designated Subsidiary
of the Company.

        (e) "Compensation" means, for Offering Periods commencing prior to
November 15, 2000, all regular straight time earnings, exclusive of payments for
overtime, shift premium, incentive compensation, incentive payments, bonuses,
commissions and other compensation. For Offering Periods commencing on or after
November 15, 2000, "Compensation" shall mean all regular and recurring straight
time earnings, payments for overtime, shift premium, incentive compensation,
incentive payments, bonuses, commissions, but exclusive of other compensation.

        (f) "Designated Subsidiary" means any Subsidiary which has been
designated by the Board from time to time in its sole discretion as eligible to
participate in the Plan.

        (g) "Employee" means any individual who is an Employee of the Company
for tax purposes whose customary employment with the Company is at least 20
hours per week and more than five months in a calendar year. For purposes of the
Plan, the employment relationship will be treated as continuing intact while the
individual is on sick leave or other leave of absence approved in writing by the
Company. Where the period of leave exceeds 90 days and the individual's right to
reemployment is not guaranteed either by statute or by contract, the employment
relationship shall be deemed to have terminated on the 91st day of such leave.
It shall not include any independent contractors providing services to the
Company or its Subsidiaries, regardless of the length of such service.

        (h) "Enrollment Date" means the first Trading Day of each Offering
Period.

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        (i) "Exercise Date" means the last Trading Day of each Purchase Period.

        (j) "Fair Market Value" means, as of any date, the value of the Common
Stock determined as follows:

            (i) If the Common Stock is listed on any established stock exchange
or a national market system, its Fair Market Value shall be the closing sales
price for such stock (or the closing bid, if no sales were reported) as quoted
on such exchange or system for the last market trading day on the date of such
determination, as reported in The Wall Street Journal or such other source as
the Board deems reliable;

            (ii) If the Common Stock is regularly quoted by a recognized
securities dealer but selling prices are not reported, its Fair Market Value
shall be the mean of the closing bid and asked prices for the Common Stock on
the date of such determination, as reported in The Wall Street Journal or such
other source as the Board deems reliable; or

            (iii) In the absence of an established market for the Common Stock,
the Fair Market Value shall be determined in good faith by the Board.

        (k) "Offering Periods" means a period of approximately 12 months during
which an option granted pursuant to the Plan may be exercised as further
described in Section 4, except that the Offering Period that began October 1,
1998 will end on September 29, 2000 and an Offering Period shall commence on
October 1, 2000 and end on November 14, 2000. The duration and timing of
Offering Periods may be changed pursuant to Sections 4 and 20 of this Plan.

        (l) "Plan" means this Amended and Restated Employee Stock Purchase Plan.

        (m) "Purchase Period" means the approximately six-month period
commencing after one Exercise Date and ending with the next Exercise Date,
except that the first Purchase Period of any Offering Period will commence on
the Enrollment Date and end with the next Exercise Date. Notwithstanding the
foregoing, with respect to the Offering Period commencing upon October 1, 2000
and ending on November 14, 2000 , "Purchase Period" shall be the same
(approximately) six week period.

        (n) "Purchase Price" means 85% of the Fair Market Value of a share of
Common Stock on the Enrollment Date or on the Exercise Date, whichever is lower;
provided, however, that with respect to the Offering Periods commencing on or
after January 1, 1999, unless otherwise directed by the Board, if the Fair
Market Value of a share of Common Stock on the date on which additional shares
of Common Stock (the "New Shares") are authorized for issuance hereunder by the
Company's stockholders (the "Authorization Date") is higher than the Fair Market
Value of a share of Common Stock on the Enrollment Date of any outstanding
Offering Period that commenced prior to the Authorization Date, the Purchase
Price for only New Shares to be issued on any remaining Exercise Date of any
Offering Period in effect on the Authorization Date shall be 85% of the Fair
Market Value of a share of Common Stock on the Authorization Date or on the
Exercise Date, whichever is lower. The Purchase Price may be adjusted by the
Board pursuant to Section 20.

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        (o) "Reserves" means the number of shares of Common Stock covered by
each option under the Plan which have not yet been exercised and the number of
shares of Common Stock that have been authorized for issuance under the Plan but
not yet placed under option.

        (p) "Subsidiary" means any corporation, domestic or foreign, of which
not less than 50% of the voting shares are held by the Company or a Subsidiary,
whether or not such corporation now exists or is hereafter organized or acquired
by the Company or a Subsidiary.

        (q) "Trading Day" means a day on which national stock exchanges and the
Nasdaq System are open for trading.

3. ELIGIBILITY.

        (a) Any Employee who is employed by the Company on a given Enrollment
Date shall be eligible to participate in the Plan, subject to the requirements
of Section 5(a) and the limitations imposed by Section 423(b) of the Code.

        (b) Any provisions of the Plan to the contrary notwithstanding, no
Employee shall be granted an option under the Plan (i) to the extent that,
immediately after the grant, such Employee (or any other person whose stock
ownership would be attributed to such Employee pursuant to Section 424(d) of the
Code) would own capital stock and/or hold outstanding options to purchase shares
possessing five percent or more of the total combined voting power or value of
all classes of the capital stock of the Company or of any Subsidiary, or (ii) to
the extent that his or her rights to purchase stock under all employee stock
purchase plans (described in Section 423 of the Code) of the Company and its
Subsidiaries accrue (i.e., become exercisable) at a rate which exceeds $25,000
worth of stock (determined at the fair market value of the shares at the time
such option is granted) for each calendar year in which such option is
outstanding at any time.

4. OFFERING PERIODS. The Plan shall be implemented by consecutive, overlapping
Offering Periods with a new Offering Period commencing on the first Trading Day
on or after May 15 and November 15 each year, or on such other date as the Board
shall determine, and continuing thereafter until terminated in accordance with
Section 20 hereof, except as set forth in this Section 4. The first Offering
Period of the Plan as amended and restated shall commence with the first Trading
Day on or after May 15, 1999 and end on the last Trading Day on or before May
14, 2000. The Offering Period which began on October 1, 1998 will end on
September 29, 2000 and an Offering Period shall commence on October 1, 2000 and
end on November 14, 2000. The Board shall have the power to change the duration
of Offering Periods (including the commencement dates thereof) with respect to
future offerings without stockholder approval, if such change is announced prior
to the scheduled beginning of the first Offering Period to be affected
thereafter.

5. PARTICIPATION.

        (a) An eligible Employee may become a participant in the Plan by
completing a subscription agreement authorizing payroll deductions in the form
provided by the Company and filing it with the Company payroll office prior to
the applicable Enrollment Date, unless a later time for filing the subscription
agreement is set for all eligible Employees with respect to such Offering
Period.

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        (b) Payroll deductions for a participant shall commence with the first
payroll following the Enrollment Date and shall end on the last payroll in the
Offering Period to which such authorization is applicable, unless sooner
terminated by the participant as provided in Section 10.

6. PAYROLL DEDUCTIONS.

        (a) At the time a participant files his or her subscription agreement,
he or she shall elect to have payroll deductions made on each payday during all
subsequent Offering Periods commencing prior to November 15, 2000 in an amount
not exceeding 10%, and during all Offering Periods commencing on or after
November 15, 2000 in an amount not exceeding 15%, or such other rate as may be
determined from time to time by the Board, expressed as a whole percent, of the
Compensation which he or she receives on such payday during said Offering Period
and the aggregate of such deduction during the Offering Period shall not exceed
10% or 15%, as applicable in accordance with the foregoing, of the aggregate
Compensation during such Offering Period.

        (b) All payroll deductions authorized by a participant shall be credited
to his or her account under the Plan and shall be withheld in whole percentages
only. A participant may not make any additional payments into such account.

        (c) A participant may discontinue his or her participation in the Plan
as provided in Section 10, or may decrease the rate of his or her payroll
deductions (but not below 1%) effective immediately or may increase (but not
above 10% and for Offering Periods commencing on or after November 15, 2000, not
above 15%) the rate of his payroll deductions effective as of the first date of
the next Purchase Period within such Offering Period by completing and filing
with the Company a new subscription agreement authorizing a change in payroll
deduction. The Board may, in its discretion, limit the number of participation
rate changes during any Offering Period. The change in rate shall be effective
as soon as administratively feasible following the Company's receipt of the new
authorization. A participant's subscription agreement shall remain in effect for
successive Offering Periods unless terminated as provided in Section 10.

        (d) Notwithstanding the foregoing, to the extent necessary to comply
with Section 423(b)(8) of the Code and Section 3(b) of the Plan, a participant's
payroll deductions may be automatically decreased to zero percent at any time
during a Purchase Period. Payroll deductions shall recommence at the rate
provided in such participant's subscription agreement at the beginning of the
first Purchase Period which is scheduled to end in the following calendar year,
unless terminated by the participant as provided in Section 10.

        (e) At the time the option is exercised, in whole or in part, or at the
time some or all of the Company's Common Stock issued under the Plan is disposed
of, the participant must make adequate provision for the Company's federal,
state or other tax withholding obligations, if any, which arise on the exercise
of the option or the disposition of the Common Stock. At any time the Company
may, but shall not be obligated to, withhold from the participant's compensation
the amount necessary for the Company to meet applicable withholding obligations,
including any withholding required to make available to the Company any tax
deductions or benefits attributable to sale or early disposition of Common Stock
by the Employee.

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7. GRANT OF OPTION. On each Enrollment Date of each Offering Period, each
eligible Employee participating in such Offering Period shall be granted an
option to purchase on each Exercise Date during such Offering Period (at the
applicable Purchase Price) up to a number of full shares of the Company's Common
Stock determined by dividing such Employee's payroll deductions accumulated
prior to such Exercise Date and retained in the Employee's account as of the
Exercise Date by the applicable Purchase Price; provided that in no event shall
an Employee be permitted to purchase more than 1,500 shares in each Purchase
Period within Offering Periods commencing in the year 2001, provided further
that such purchase shall be subject to the limitations set forth in Sections
3(b) and 13. The Board may, for future Offering Periods, increase or decrease,
in its absolute discretion, the maximum number of shares of the Company's Common
Stock an Employee may purchase during each Purchase Period of such Offering
Period. Exercise of the option shall occur as provided in Section 8, unless the
participant has withdrawn pursuant to Section 10. The option shall expire on the
last day of the Offering Period.

8. EXERCISE OF OPTION.

        (a) Unless a participant withdraws from the Offering Period as provided
in Section 10, his or her option for the purchase of shares will be exercised
automatically on the Exercise Date, and the maximum number of full shares
subject to option will be purchased at the applicable Purchase Price with the
accumulated payroll deductions in his or her account. No fractional shares will
be purchased. Any payroll deductions accumulated in a participant's account that
are not sufficient to purchase a full share will be retained in the
participant's account for the subsequent Purchase Period or Offering Period,
subject to earlier withdrawal by the participant as provided in Section 10 or
unless the Offering Period has been over-subscribed, in which event such amount
shall be refunded to the participant. During his or her lifetime, a
participant's option to purchase shares hereunder is exercisable only by the
participant.

        (b) If the Board determines that, on a given Exercise Date, the number
of shares with respect to which options are to be exercised may exceed (i) the
number of shares of Common Stock that were available for sale under the Plan on
the Enrollment Date of the applicable Offering Period, or (ii) the number of
shares available for sale under the Plan on such Exercise Date, the Board may in
its sole discretion provide that the Company shall make a pro rata allocation of
the shares of Common Stock available for purchase on such Enrollment Date or
Exercise Date, as applicable, in as uniform a manner as shall be practicable and
as it shall determine in its sole discretion to be equitable among all
participants exercising options to purchase Common Stock on such Exercise Date,
and (x) continue all Offering Periods then in effect, or (y) terminate any or
all Offering Periods then in effect pursuant to Section 20. The Company may make
pro rata allocation of the shares available on the Enrollment Date of any
applicable Offering Period pursuant to the preceding sentence, notwithstanding
any authorization of additional shares for issuance under the Plan by the
Company's stockholders subsequent to such Enrollment Date.

9. DELIVERY. As promptly as practicable after each Exercise Date on which a
purchase of shares occurs, the Company shall arrange for the shares purchased
upon exercise of his or her option to be electronically credited to the
participant's brokerage account at the securities brokerage firms designated by
the Company for its direct deposit program from time to time.

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10. WITHDRAWAL; TERMINATION OF EMPLOYMENT.

        (a) A participant may withdraw all, but not less than all, the payroll
deductions credited to his or her account and not yet used to exercise his or
her option under the Plan at any time by giving written notice to the Company on
a form provided for such purpose. All of the participant's payroll deductions
credited to his or her account will be paid to the participant as soon as
practicable after receipt of the notice of withdrawal, his or her option for the
current Offering Period will be automatically canceled, and no further payroll
deductions for the purchase of shares will be made during such Offering Period.
If a participant withdraws from an Offering Period, payroll deductions shall not
resume at the beginning of the succeeding Offering Period unless the participant
delivers to the Company a new subscription agreement.

        (b) A participant's withdrawal from an Offering Period will not have any
effect upon his or her eligibility to participate in a succeeding Offering
Period which begins after the end of the Offering Period from which the
participant withdraws or in any similar plan which may hereafter be adopted by
the Company.

11. TERMINATION OF EMPLOYMENT. Upon a participant's ceasing to be an Employee
for any reason, including retirement or death, he or she will be deemed to have
elected to withdraw from the Plan and the payroll deductions accumulated in his
or her account during the Offering Period but not yet used to exercise the
option will be returned to him or her as soon as practicable after such
termination or, in the case of death, to the person or persons entitled thereto
under Section 15, and his or her option will be automatically terminated. The
preceding sentence notwithstanding, a participant who receives payment in lieu
of notice of termination of employment shall be treated as continuing to be an
Employee for the participant's customary number of hours per week of employment
during the period in which the participant is subject to such payment in lieu of
notice. In the case of death of the participant, the payroll deductions credited
to the participant's account will be paid to the person or persons entitled
thereto under paragraph 15, and such participant's option will be automatically
terminated, except that the beneficiary may elect to have funds remain in the
participant's account until the next Exercise Date in which case the shares
purchased with the funds in the participant's account at the time of death in
accordance with paragraph 8 will be forwarded to the beneficiary.

12. INTEREST. No interest shall accrue on the payroll deductions of a
participant in the Plan.

13. STOCK.

        (a) Subject to adjustment upon changes in capitalization of the Company
as provided in Section 19, the maximum number of shares of the Company's Common
Stock which shall be reserved for sale under the Plan shall be 60,314,110
shares, plus an annual increase to be added as of the first day of each fiscal
year by an amount equal to (x) 1.15% of the shares of the Company's Common Stock
issued and outstanding on the last day of the immediately preceding fiscal year
less (y) the number of shares available for future option grants under the Plan
on the last day of the immediately preceding fiscal year, or a lesser amount
determined by the Board, but not to exceed 3,000,000 shares (subject to any
adjustment pursuant to Section 19) in any fiscal year.

        (b) The participant will have no interest or voting rights in shares
covered by his or her option until such option has been exercised.

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        (c) Shares to be delivered to a participant under the Plan shall be
registered in the name of the participant or in the name of the participant and
his or her spouse.

14. ADMINISTRATION. The Plan shall be administered by the Board or a committee
of members of the Board appointed by the Board. The Board or its committee shall
have full and exclusive discretionary authority to construe, interpret and apply
the terms of the Plan, to determine eligibility and to adjudicate all disputed
claims filed under the Plan. Every finding, decision and determination made by
the Board or its committee shall, to the full extent permitted by law, be final
and binding upon all parties.

15. DESIGNATION OF BENEFICIARY.

        (a) A participant may file a written designation of a beneficiary who is
to receive shares and/or cash, if any, from the participant's account under the
Plan in the event of such participant's death at a time when cash or shares are
held for his or her account. If the participant is married and the designated
beneficiary is not the spouse, spousal consent shall be required for such
designation to be effective.

        (b) Such designation of beneficiary may be changed by the participant at
any time by written notice. In the event of the death of a participant in the
absence of a valid designation of a beneficiary who is living at the time of
such participant's death, the Company shall deliver such shares and/or cash to
the executor or administrator of the estate of the participant; or if no such
executor or administrator has been appointed (to the knowledge of the Company),
the Company, in its discretion, may deliver such shares and/or cash to the
spouse or to any one or more dependents or relatives of the participant, or if
no spouse, dependent or relative is known to the Company, then to such other
person as the Company may reasonably designate.

16. TRANSFERABILITY. Neither payroll deductions credited to a participant's
account nor any rights with regard to the exercise of an option or to receive
shares under the Plan may be assigned, transferred, pledged or otherwise
disposed of in any way (other than by will, the laws of descent and
distribution, or as provided in Section 15 hereof) by the participant. Any such
attempt at assignment, transfer, pledge or other disposition shall be without
effect, except that the Company may treat such act as an election to withdraw
funds in accordance with Section 10.

17. USE OF FUNDS. All payroll deductions received or held by the Company under
the Plan may be used by the Company for any corporate purpose, and the Company
shall not be obligated to segregate such payroll deductions.

18. REPORTS. Individual accounts will be maintained for each participant in the
Plan. Statements of account will be given to participating Employees at least
annually, and will set forth the amounts of payroll deductions, the Purchase
Price, the number of shares purchased and the remaining cash balance, if any.

19. ADJUSTMENTS UPON CHANGES IN CAPITALIZATION.

        (a) Changes in Capitalization. Subject to any required action by the
stockholders of the Company, the Reserves, the maximum number of shares each
participant may purchase each Purchase Period (under Section 7), as well as the
price per share and the number of shares of Common Stock

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covered by each option under the Plan that has not yet been exercised, shall be
proportionately adjusted for any increase or decrease in the number of issued
shares of Common Stock resulting from a stock split, reverse stock split, stock
dividend, combination or reclassification of the Common Stock or any other
increase or decrease in the number of shares of Common Stock effected without
receipt of consideration by the Company; provided, however, that conversion of
any convertible securities of the Company shall not be deemed to have been
"effected without receipt of consideration." Such adjustment shall be made by
the Board, whose determination in that respect shall be final, binding and
conclusive. Except as expressly provided herein, no issuance by the Company of
shares of stock of any class, or securities convertible into shares of stock of
any class, shall affect, and no adjustment by reason thereof shall be made with
respect to, the number or price of shares of Common Stock subject to option.

        (b) Dissolution or Liquidation. In the event of the proposed dissolution
or liquidation of the Company, the Offering Period then in progress will be
shortened by setting a new Exercise Date (the "New Exercise Date"), and shall
terminate immediately prior to the consummation of such proposed dissolution or
liquidation, unless otherwise provided by the Board. The New Exercise Date shall
be before the date of the Company's proposed dissolution or liquidation. The
Company shall notify each participant in writing at least ten business days
prior to the New Exercise Date, that the Exercise Date for the participant's
option has been changed to the New Exercise Date and that the participant's
option shall be exercised automatically on the New Exercise Date, unless prior
to such date the participant has withdrawn from the Offering Period as provided
in Section 10.

        (c) Merger or Asset Sale. In the event of a proposed sale of all or
substantially all of the assets of the Company, or the merger of the Company
with or into another corporation, each option under the Plan shall be assumed or
an equivalent option shall be substituted by the successor corporation or a
parent or Subsidiary of the successor corporation. If the successor corporation
refuses to assume or substitute for the option, any Purchase Periods then in
progress shall be shortened by setting a new Exercise Date (the "New Exercise
Date") and any Offering Periods then in progress shall end on the New Exercise
Date. The New Exercise Date shall be before the date of the Company's proposed
sale or merger. The Company shall notify each participant in writing prior to
the New Exercise Date, that the Exercise Date for the participant's option has
been changed to the New Exercise Date and that the participant's option will be
exercised automatically on the New Exercise Date, unless prior to such date the
participant has withdrawn from the Offering Period as provided in Section 10.

The Board may, if it so determines in the exercise of its sole discretion, also
make provision for adjusting the Reserves, as well as the price per share of
Common Stock covered by each outstanding option, in the event that the Company
effects one or more reorganizations, recapitalizations, rights offerings or
other increases or reductions of shares of its outstanding Common Stock, and in
the event of the Company being consolidated with or merged into any other
corporation.

20. AMENDMENT OR TERMINATION.

        (a) The Board of Directors of the Company may at any time and for any
reason terminate or amend the Plan. Except as provided in Section 19, no such
termination will affect options previously granted, provided that an Offering
Period may be terminated by the Board on any Exercise Date if the Board
determines that the termination of the Offering Period or the Plan is in the
best interests of the Company and its stockholders. Except as provided in
Section 19 and this Section 20, no amendment may make any change in any option
theretofore granted which adversely affects the rights of any participant.

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To the extent necessary to comply with Section 423 of the Code (or any successor
rule or provision or any other applicable law, regulation or stock exchange
rule), the Company shall obtain stockholder approval in such a manner and to
such a degree as required.

        (b) Without stockholder consent and without regard to whether any
participant rights may be considered to have been "adversely affected," the
Board (or its committee) shall be entitled to change the Offering Periods, limit
the frequency and/or number of changes in the amount withheld during an Offering
Period, establish the exchange ratio applicable to amounts withheld in a
currency other than U.S. dollars, permit payroll withholding in excess of the
amount designated by a participant in order to adjust for delays or mistakes in
the Company's processing of properly completed withholding elections, establish
reasonable waiting and adjustment periods and/or accounting and crediting
procedures to ensure that amounts applied toward the purchase of Common Stock
for each participant properly correspond with amounts withheld from the
participant's Compensation and establish such other limitations or procedures as
the Board determines in its sole discretion advisable which are consistent with
the Plan.

        (c) In the event the Board determines that the ongoing operation of the
Plan may result in unfavorable financial accounting consequences, the Board may,
in its discretion and, to the extent necessary or desirable, modify or amend the
Plan to reduce or eliminate such accounting consequence including, but not
limited to:

            (i) altering the Purchase Price for any Offering Period including an
Offering Period underway at the time of the change in Purchase Price;

            (ii) shortening any Offering Period so that the Offering Period ends
on a new Exercise Date, including an Offering Period underway at the time of the
Board action; and

            (iii) allocating shares.

Such modifications or amendments shall not require stockholder approval or the
consent of any Plan participants.

        21. NOTICES. All notices or other communications by a participant to the
Company in connection with the Plan shall be deemed to have been duly given when
received in the form specified by the Company at the location, or by the person,
designated by the Company for the receipt thereof. Notices given by means of the
Company's intranet (Planet) or similar system will be deemed to be written
notices under the Plan.

        22. CONDITIONS UPON ISSUANCE OF SHARES. Shares shall not be issued with
respect to an option unless the exercise of such option and the issuance and
delivery of such shares pursuant thereto shall comply with all applicable
provisions of law, domestic or foreign, including, without limitation, the
Securities Act of 1933, as amended, the Securities Exchange Act of 1934, as
amended, the rules and regulations promulgated thereunder, and the requirements
of any stock exchange upon which the shares may then be listed, and shall be
further subject to the approval of counsel for the Company with respect to such
compliance.

As a condition to the exercise of an option, if required by applicable
securities laws, the Company may require the participant for whose account the
option is being exercised to represent and warrant at the

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time of such exercise that the shares are being purchased only for investment
and without any present intention to sell or distribute such shares if, in the
opinion of counsel for the Company, such a representation is required by any of
the aforementioned applicable provisions of law.

        23. TERM OF PLAN. The Plan shall become effective upon the earlier to
occur of its adoption by the Board of Directors of the Company or it is approved
by the stockholders. It shall continue in effect for a term of 10 years unless
sooner terminated under Section 20.

        24. EMPLOYMENT RELATIONSHIP. Nothing in the Plan shall be construed as
creating a contract for employment for any period or shall interfere with or
limit in any way the right of the Company or of any Subsidiary to terminate any
participant's employment relationship at any time, with or without cause, nor
confer upon any participant any right to continue in the employ of the Company
or any Subsidiary.Exhibit 4.5

                     AMENDMENT NO. 1 TO THE RIGHTS AGREEMENT

         This Amendment No. 1 (this "Amendment"), dated as of July 12, 2002,
between PHARMACIA CORPORATION, a Delaware corporation (the "Company") and MELLON
INVESTOR SERVICES LLC, a New Jersey limited liability company, as Rights Agent
(the "Rights Agent"), to the Amended and Restated Rights Agreement, dated as of
February 20, 2001, between the Company and the Rights Agent (the "Rights
Agreement"); all capitalized terms not defined herein shall have the meanings
ascribed to such terms in the Rights Agreement.

         WHEREAS, the Company proposes to enter into an Agreement and Plan of
Merger, dated as of July 13, 2002 (as amended, supplemented, modified or
replaced from time to time, the "Merger Agreement"), among Pfizer, Inc., a
Delaware corporation ("Parent"), Pfizer Acquisition Sub Corp., a Delaware
corporation and a direct, wholly owned subsidiary of Parent ("Merger Sub"), and
the Company;

         WHEREAS, the Board of Directors of the Company has determined that the
Merger Agreement and the terms and conditions set forth therein and the
transactions contemplated thereby, including, without limitation, the Merger (as
defined in the Merger Agreement), are advisable and are fair to and in the best
interests of the Company and its stockholders;

         WHEREAS, the Board of Directors of the Company has determined, in
connection with its contemplation of the Merger Agreement, that it is necessary
and desirable to amend the Rights Agreement to exempt the Merger Agreement and
the transactions contemplated thereby, including, without limitation, the
Merger, from the application of the Rights Agreement as set forth in this
Amendment;

                                       5

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         WHEREAS, Section 27 of the Rights Agreement provides that the Company
may in its sole and absolute discretion from time to time supplement and amend
the Rights Agreement without the approval of any holders of Rights Certificates
in order, among other things, to make any provisions with respect to the Rights
which the Company may deem necessary or desirable; and

         WHEREAS, pursuant to Section 27, the Company hereby directs that the
Rights Agreement should be amended as set forth in this Amendment.

         NOW THEREFORE, in consideration of the foregoing premises and mutual
covenants and agreements set forth herein, and other good and valuable
consideration, the receipt and sufficiency of which is hereby acknowledged, the
Company and the Rights Agent hereby agree as follows:

         Section 1. Amendment to Section 1(a). Section 1(a) of the Rights
Agreement is hereby amended and supplemented by adding the following sentence to
the end thereof:

     "Notwithstanding anything in this Agreement to the contrary, neither
     Pfizer, Inc., a Delaware corporation ("Parent"), nor Pfizer
     Acquisition Sub Corp., a Delaware corporation and a direct, wholly
     owned subsidiary of Parent ("Merger Sub"), nor any of Parent's
     Affiliates shall become or be deemed to be an Acquiring Person as a
     result of (i) the approval, execution, delivery or performance of the
     Agreement and Plan of Merger, dated as of July 13, 2002, among Parent,
     Merger Sub and the Company (as amended, supplemented, modified or
     replaced from time to time, the "Merger Agreement"), (ii) the
     consummation of the Merger (as defined in the Merger Agreement), (iii)
     the consummation of any other transaction contemplated in the Merger
     Agreement, including the exchange of common stock of the Company for
     common stock of the Parent thereunder pursuant to the Merger
     Agreement, or (iv) the public announcement of any of the foregoing."

         Section 2. Amendment to Section 1(l). Section 1(l) of the Rights
Agreement is hereby amended and supplemented by adding the following sentence to
the end thereof:

     "Notwithstanding anything in this Agreement to the contrary, a Shares
     Acquisition Date shall not occur or be deemed to have occurred as a
     result of (i) the approval, execution, delivery or performance of the
     Merger Agreement, (ii) the consummation of the Merger, (iii) the
     consummation of any other transaction contemplated in the Merger
     Agreement, including the exchange of common stock of the Company for
     common stock of the

                                     6

<PAGE>

     Parent thereunder pursuant to the Merger Agreement, or (iv) the public
     announcement of any of the foregoing."

         Section 3. Amendment to Section 3. Section 3 of the Rights Agreement is
hereby amended and supplemented by adding the following proviso to the end of
the first sentence thereof:

     "; provided that notwithstanding anything in this Agreement to the
     contrary, a Distribution Date shall not occur or be deemed to have
     occurred as a result of (i) the approval, execution, delivery or
     performance of the Merger Agreement, (ii) the consummation of the
     Merger, (iii) the consummation of any other transaction contemplated
     in the Merger Agreement, including the exchange of common stock of the
     Company for common stock of the Parent thereunder pursuant to the
     Merger Agreement, or (iv) the public announcement of any of the
     foregoing."

         Section 4. Effective Date. This Amendment shall be deemed effective as
of the date first written above, as if executed on such date.

         Section 5. Governing Law. This Amendment shall be deemed to be a
contract made under the laws of the State of Delaware and for all purposes shall
be governed by and construed in accordance with the laws of such State
applicable to contracts to be made and performed entirely within such State;
provided, however, that all provisions regarding the rights, duties and
obligations of the Rights Agent shall be governed by and construed in accordance
with the laws of the State of New York applicable to contracts made and to be
performed entirely within such State.

         Section 6. Severability. If any term, provision, covenant or
restriction of this Amendment is held by a court of competent jurisdiction or
other competent authority to be invalid, illegal or incapable of being enforced,
the remainder of the terms, provisions, covenants and restrictions of this
Amendment, and of the Rights Agreement, shall remain in full force and effect
and shall in no way be affected, impaired or invalidated. Upon any such
determination that any term or other provision is invalid, illegal or incapable
of being enforced, the parties hereto shall negotiate in good faith to modify
such provision so as to effect the original intent of

                                       7

<PAGE>

the parties as closely as possible and in an acceptable manner with respect to
such provision to the greatest extent possible.

         Section 7. Notice. The Rights Agent and the Company hereby waive any
notice requirement with respect to each other under the Rights Agreement, if
any, pertaining to the matters covered by this Amendment.

         Section 8. No Other Effect. Except as expressly set forth herein, the
Rights Agreement shall not by implication or otherwise be supplemented or
amended by virtue of this Amendment, but shall remain in full force and effect,
as amended hereby.

         Section 9. Counterparts. This Amendment may be executed in any number
of counterparts and each of such counterparts shall for all purposes be deemed
to be an original, and all such counterparts shall together constitute but one
and the same instrument.

                                       8

<PAGE>

                  IN WITNESS WHEREOF, the parties hereto have caused this
Amendment to be duly executed as of the date and year first above written.

                                   PHARMACIA CORPORATION

                                   By /s/ Judith Reinsdorf
                                      -----------------------------------------
                                      Name:  Judith Reinsdorf
                                      Title: Vice President and Assistant
                                             Secretary

                                   MELLON INVESTOR SERVICES LLC

                                   By /s/ Daniel M. Egan
                                      -----------------------------------------
                                      Name:  Daniel M. Egan
                                      Title: Vice President

                                       9

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