1991 Stock Option Plan - Gilead Sciences Inc.


                              GILEAD SCIENCES, INC.
                             1991 STOCK OPTION PLAN
                           ADOPTED NOVEMBER 15, 1991
                             AMENDED APRIL 8, 1992
                             AMENDED APRIL 21, 1993
                            AMENDED OCTOBER 17, 1995
                     AMENDED AND RESTATED JANUARY 22, 1998
                       TERMINATION DATE: OCTOBER 31, 2001
 
1.  PURPOSES.
 
    (a) The Plan initially was adopted on November 15, 1991 and amended through
October 17, 1995 (the 'Initial Plan'). The Initial Plan hereby is amended and
restated in its entirety effective as of January 22, 1998. The terms of the Plan
(excluding the amended provision relating to the exercise price of Nonstatutory
Stock Options) shall apply to all options granted pursuant to the Initial Plan.
 
    (b) The purpose of the Plan is to provide a means by which selected
Employees and Directors of, and Consultants to, the Company and its Affiliates
may be given an opportunity to purchase stock of the Company.
 
    (c) The Company, by means of the Plan, seeks to retain the services of
persons who are now Employees of or Consultants to the Company, to secure and
retain the services of new Employees and Consultants, and to provide incentives
for such persons to exert maximum efforts for the success of the Company.
 
    (d) The Company intends that the Options issued under the Plan shall, in the
discretion of the Board or any Committee to which responsibility for
administration of the Plan has been delegated pursuant to subsection 3(c), be
either Incentive Stock Options or Nonstatutory Stock Options. All Options shall
be separately designated Incentive Stock Options or Nonstatutory Stock Options
at the time of grant, and in such form as issued pursuant to Section 6, and a
separate certificate or certificates will be issued for shares purchased on
exercise of each type of Option.
 
2.  DEFINITIONS.
 
    (a) 'AFFILIATE' means any parent corporation or subsidiary corporation of
the Company, whether now or hereafter existing, as those terms are defined in
Sections 424(e) and (f) respectively, of the Code.
 
    (b) 'BOARD' means the Board of Directors of the Company.
 
    (c) 'CODE' means the Internal Revenue Code of 1986, as amended.
 
    (d) 'COMMITTEE' means a Committee appointed by the Board in accordance with
subsection 3(c) of the Plan.
 
    (e) 'COMPANY' means Gilead Sciences, Inc., a Delaware corporation.
 
    (f) 'CONSULTANT' means any person, including an advisor, engaged by the
Company or an Affiliate to render services and who is compensated for such
services, provided that the term 'Consultant' shall not include Directors who
are paid only a director's fee by the Company or who are not otherwise
compensated by the Company for their services as Directors. The term
'Consultant' shall include a member of the Board of Directors of an Affiliate.
 
    (g) 'CONTINUOUS SERVICE' (formerly designated as 'CONTINUOUS STATUS AS AN
EMPLOYEE OR CONSULTANT') means that the Optionee's service with the Company or
its Affiliates is not interrupted or terminated. The Optionee's Continuous
Service shall not be deemed to have terminated merely because of a change in the
capacity in which the Optionee renders service to the Company or its Affiliates
or a change in the entity for
 
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which the Optionee renders such service, provided that there is no interruption
or termination of the Optionee's Continuous Service. For example, a change in
status from an Employee of the Company to a Consultant or Director of the
Company or a member of the Board of Directors of an Affiliate will not
constitute an interruption of Continuous Service. The Board or the chief
executive officer of the Company, in that party's sole discretion, may determine
whether Continuous Service shall be considered interrupted in the case of any
leave of absence approved by the Board or the chief executive officer of the
Company, including sick leave, military leave, or any other personal leave.
 
    (h) 'COVERED EMPLOYEE' means the chief executive officer and the four (4)
other highest compensated officers of the Company for whom total compensation is
required to be reported to shareholders under the Exchange Act, as determined
for purposes of Section 162(m) of the Code.
 
    (i) 'DIRECTOR' means a member of the Board.
 
    (j) 'DISABILITY' means total and permanent disability as defined in Section
22(e)(3) of the Code.
 
    (k) 'EMPLOYEE' means any person, including Officers and Directors, employed
by the Company or any Affiliate of the Company. Neither service as a Director
nor payment of a director's fee by the Company shall be sufficient to constitute
'employment' by the Company.
 
    (l) 'EXCHANGE ACT' means the Securities Exchange Act of 1934, as amended.
 
    (m) 'FAIR MARKET VALUE' means, as of any date, the value of the common stock
of the Company determined as follows:
 
        (i) If the common stock is listed on any established stock exchange or a
    national market system, including without limitation the National Market
    System of the National Association of Securities Dealers, Inc. Automated
    Quotation ('NASDAQ') System, the Fair Market Value of a share of common
    stock shall be the closing sales price for such stock (or the closing bid,
    if no sales were reported) as quoted on such system or exchange (or the
    exchange with the greatest volume of trading in common stock) on the last
    market trading day prior to the day of determination, as reported in The
    Wall Street Journal or such other source as the Board deems reliable;
 
        (ii) If the common stock is quoted on the NASDAQ System (but not on the
    National Market System thereof) or is regularly quoted by a recognized
    securities dealer but selling prices are not reported, the Fair Market Value
    of a share of common stock shall be the mean between the high bid and high
    asked prices for the common stock on the last market trading day prior to
    the day of determination, as reported in The Wall Street Journal or such
    other source as the Board deems reliable;
 
       (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.
 
    (n) 'INCENTIVE STOCK OPTION' means an Option intended to qualify as an
incentive stock option within the meaning of Section 422 of the Code and the
regulations promulgated thereunder.
 
    (o) 'NON-EMPLOYEE DIRECTOR' means a Director who either (i) is not a current
Employee or Officer of the Company or its parent or subsidiary, does not receive
compensation (directly or indirectly) from the Company or its parent or
subsidiary for services rendered as a consultant or in any capacity other than
as a Director (except for an amount as to which disclosure would not be required
under Item 404(a) of Regulation S-K promulgated pursuant to the Securities Act),
does not possess an interest in any other transaction as to which disclosure
would be required under Item 404(a) of Regulation S-K, and is not engaged in a
business relationship as to which disclosure would be required under Item 404(b)
of Regulation S-K; or (ii) is otherwise considered a 'non-employee director' for
purposes of Rule 16b-3.
 
    (p) 'NONSTATUTORY STOCK OPTION' means an Option not intended to qualify as
an Incentive Stock Option.
 
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    (q) 'OFFICER' means a person who is an officer of the Company within the
meaning of Section 16 of the Exchange Act and the rules and regulations
promulgated thereunder.
 
    (r) 'OPTION' means a stock option granted pursuant to the Plan.
 
    (s) 'OPTION AGREEMENT' means a written agreement between the Company and an
Optionee evidencing the terms and conditions of an individual Option grant. The
Option Agreement is subject to the terms and conditions of the Plan.
 
    (t) 'OPTIONED STOCK' means the common stock of the Company subject to an
Option.
 
    (u) 'OPTIONEE' means a person who holds an outstanding Option.
 
    (v) 'OUTSIDE DIRECTOR' means a Director who either (i) is not a current
employee of the Company or an 'affiliated corporation' (within the meaning of
the Treasury regulations promulgated under Section 162(m) of the Code), is not a
former employee of the Company or an 'affiliated corporation' receiving
compensation for prior services (other than benefits under a tax qualified
pension plan), was not an officer of the Company or an 'affiliated corporation'
at any time, and is not currently receiving direct or indirect remuneration from
the Company or an 'affiliated corporation' for services in any capacity other
than as a Director, or (ii) is otherwise considered an 'outside director' for
purposes of Section 162(m) of the Code.
 
    (w) 'PLAN' means this 1991 Stock Option Plan.
 
    (x) 'RULE 16B-3' means Rule 16b-3 of the Exchange Act or any successor to
Rule 16b-3, as in effect when discretion is being exercised with respect to the
Plan.
 
3.  ADMINISTRATION.
 
    (a) The Board shall administer the Plan unless and until the Board delegates
administration to a Committee, as provided in subsection 3(c).
 
    (b) The Board shall have the power, subject to, and within the limitations
of, the express provisions of the Plan:
 
        (i) To determine from time to time which of the persons eligible under
    the Plan shall be granted Options; when and how the Option shall be granted;
    whether the Option will be an Incentive Stock Option or a Nonstatutory Stock
    Option; the provisions of each Option granted (which need not be identical),
    including the time or times such Option may be exercised in whole or in
    part; and the number of shares for which an Option shall be granted to each
    such person.
 
        (ii) To construe and interpret the Plan and Options granted under it,
    and to establish, amend and revoke rules and regulations for its
    administration. The Board, in the exercise of this power, may correct any
    defect, omission or inconsistency in the Plan or in any Option Agreement, in
    a manner and to the extent it shall deem necessary or expedient to make the
    Plan fully effective.
 
       (iii) To amend the Plan as provided in Section 11.
 
        (iv) Generally, to exercise such powers and to perform such acts as the
    Board deems necessary or expedient to promote the best interests of the
    Company.
 
    (c) The Board may delegate administration of the Plan to a Committee or
Committees of one or more members of the Board. In the discretion of the Board,
a Committee may consist solely of two or more Outside Directors, in accordance
with Code Section 162(m), or solely of two or more Non-Employee Directors, in
accordance with Rule 16b-3 of the Exchange Act. If administration is delegated
to a Committee, the Committee shall have, in connection with the administration
of the Plan, the powers theretofore possessed by the Board (and references in
this Plan to the Board shall thereafter be to the Committee), subject, however,
to such resolutions, not inconsistent with the provisions of the Plan, as may be
adopted from time to time by the Board. The Board may abolish the Committee at
any time and revest
 
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in the Board the administration of the Plan. Within the scope of this authority,
the Board or the Committee may delegate to a committee of one or more members of
the Board the authority to grant Options to eligible persons who (1) are not
then subject to Section 16 of the Exchange Act and/or (2) are either (i) not
then Covered Employees and are not expected to be Covered Employees at the time
of recognition of income resulting from such Option, or (ii) not persons with
respect to whom the Company wishes to comply with Section 162(m) of the Code.
 
4.  SHARES SUBJECT TO THE PLAN.
 
    (a) Subject to the provisions of Section 10 relating to adjustments upon
changes in stock, the stock that may be sold pursuant to Options shall not
exceed in the aggregate Six Million Five Hundred Thousand (6,500,000) shares of
the Company's common stock. If any Option shall for any reason expire or
otherwise terminate, in whole or in part, without having been exercised in full,
the stock not purchased under such Option shall revert to again become available
for issuance under the Plan.
 
    (b) The stock subject to the Plan may be unissued shares or reacquired
shares, bought on the market or otherwise.
 
5.  ELIGIBILITY.
 
    (a) Incentive Stock Options may be granted only to Employees. Nonstatutory
Stock Options may be granted to Employees, Directors and Consultants.
 
    (b) No person shall be eligible for the grant of an Incentive Stock Option
if, at the time of grant, such person owns (or is deemed to own pursuant to
Section 424(d) of the Code) stock possessing more than ten percent (10%) of the
total combined voting power of all classes of stock of the Company or of any of
its Affiliates unless the exercise price of such Option is at least one hundred
ten percent (110%) of the Fair Market Value of such stock at the date of grant
and the Option is not exercisable after the expiration of five (5) years from
the date of grant.
 
    (c) Subject to the provisions of Section 10 relating to adjustments upon
changes in stock, no person shall be eligible to be granted Options covering
more than Five Hundred Thousand (500,000) shares of the Company's common stock
in any calendar year.
 
6.  OPTION PROVISIONS.
 
    Each Option shall be in such form and shall contain such terms and
conditions as the Board shall deem appropriate. The provisions of separate
Options need not be identical, but each Option shall include (through
incorporation of provisions hereof by reference in the Option or otherwise) the
substance of each of the following provisions:
 
    (a)  TERM.  No Option shall be exercisable after the expiration of ten (10)
years from the date it was granted.
 
    (b)  PRICE.
 
         (i)  EXERCISE PRICE.  The exercise price of each Incentive Stock Option
    and each Nonstatutory Stock Option shall be not less than one hundred
    percent (100%) of the fair market value of the stock subject to the Option
    on the date the Option is granted.
 
        (ii)  NO AUTHORITY TO REPRICE.  Without the consent of the stockholders
    of the Company, the Board shall have no authority to effect (a) the
    repricing of any outstanding Options under the Plan and/or (b) the
    cancellation of any outstanding Options under the Plan and the grant in
    substitution therefor of new Options under the Plan covering the same or
    different numbers of shares of Common Stock.
 
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    (c)  CONSIDERATION.  The purchase price of stock acquired pursuant to an
Option shall be paid, to the extent permitted by applicable statutes and
regulations, either (i) in cash at the time the Option is exercised, or (ii) at
the discretion of the Board or the Committee, at the time of the grant of the
Option, (A) by delivery to the Company of other common stock of the Company, (B)
according to a deferred payment arrangement, except that payment of the common
stock's 'par value' (as defined in the Delaware General Corporation Law) shall
not be made by deferred payment or other arrangement (which may include, without
limiting the generality of the foregoing, the use of other common stock of the
Company) with the person to whom the Option is granted or to whom the Option is
transferred pursuant to subsection 6(d), or (C) in any other form of legal
consideration that may be acceptable to the Board.
 
    In the case of any deferred payment arrangement, interest shall be
compounded at least annually and shall be charged at the minimum rate of
interest necessary to avoid the treatment as interest, under any applicable
provisions of the Code, of any amounts other than amounts stated to be interest
under the deferred payment arrangement.
 
    (d)  TRANSFERABILITY.  An Incentive Stock Option shall not be transferable
except by will or by the laws of descent and distribution, and shall be
exercisable during the lifetime of the person to whom the Option is granted only
by such person. A Nonstatutory Stock Option but not an Incentive Stock Option,
may be transferred to the extent provided in the Option Agreement; provided that
if the Option Agreement does not expressly permit the transfer of a Nonstatutory
Stock Option, the Nonstatutory Stock Option shall not be transferable except by
will, by the laws of descent and distribution and shall be exercisable during
the lifetime of the person to whom the Option is granted only by such person.
The person to whom the Option is granted may, by delivering written notice to
the Company, in a form satisfactory to the Company, designate a third party who,
in the event of the death of the Optionee, shall thereafter be entitled to
exercise the Option.
 
    (e)  VESTING.  The total number of shares of stock subject to an Option may,
but need not, be allotted in periodic installments (which may, but need not, be
equal). The Option Agreement may provide that from time to time during each of
such installment periods, the Option may become exercisable ('vest') with
respect to some or all of the shares allotted to that period, and may be
exercised with respect to some or all of the shares allotted to such period
and/or any prior period as to which the Option became vested but was not fully
exercised. During the remainder of the term of the Option (if its term extends
beyond the end of the installment periods), the option may be exercised from
time to time with respect to any shares then remaining subject to the Option.
The Option may be subject to such other terms and conditions on the time or
times when it may be exercised (which may be based on performance or other
criteria) as the Board may deem appropriate. The provisions of this subsection
6(e) are subject to any Option provisions governing the minimum number of shares
as to which an Option may be exercised.
 
    (f)  SECURITIES LAW COMPLIANCE.  The Company may require any Optionee, or
any person to whom an Option is transferred under subsection 6(d), as a
condition of exercising any such Option, (1) to give written assurances
satisfactory to the Company as to the Optionee's knowledge and experience in
financial and business matters and/or to employ a purchaser representative
reasonably satisfactory to the Company who is knowledgeable and experienced in
financial and business matters, and that he or she is capable of evaluating,
alone or together with the purchaser representative, the merits and risks of
exercising the Option; and (2) to give written assurances satisfactory to the
Company stating that such person is acquiring the stock subject to the Option
for such person's own account and not with any present intention of selling or
otherwise distributing the stock. These requirements, and any assurances given
pursuant to such requirements, shall be inoperative if (i) the issuance of the
shares upon the exercise of the Option has been registered under a then
currently effective registration statement under the Securities Act of 1933, as
amended (the 'Securities Act'), or (ii) as to any particular requirement, a
determination is made by counsel for the Company that such requirement need not
be met in the circumstances under the then applicable securities laws. The
Company may require the Optionee to provide such other representations, written
assurances, or information which the Company shall determine is necessary,
desirable or appropriate to comply with applicable securities and other laws as
a condition of granting an Option to such
 
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Optionee or permitting the Optionee to exercise such Option. The Company may,
upon advice of counsel to the Company, place legends on stock certificates
issued under the Plan as such counsel deems necessary or appropriate in order to
comply with applicable securities laws, including, but not limited to, legends
restricting the transfer of the stock.
 
    (g)  TERMINATION OF EMPLOYMENT OR CONSULTING RELATIONSHIP.  In the event an
Optionee's Continuous Status as an Employee or Consultant terminates (other than
upon the Optionee's death or Disability), the Optionee may exercise his or her
Option, but only within such period of time as is determined by the Board, and
only to the extent that the Optionee was entitled to exercise it at the date of
termination (but in no event later than the expiration of the term of such
Option as set forth in the Option Agreement). In the case of an Incentive Stock
Option, the Board shall determine such period of time (in no event to exceed
ninety (90) days from the date of termination) when the Option is granted. If,
at the date of termination, the Optionee is not entitled to exercise his or her
entire Option, the shares covered by the unexercisable portion of the Option
shall revert to the Plan. If, after termination, the Optionee does not exercise
his or her Option within the time specified in the Option Agreement, the Option
shall terminate, and the shares covered by such Option shall revert to the Plan.
 
    (h)  DISABILITY OF OPTIONEE.  In the event an Optionee's Continuous Service
terminates as a result of the Optionee's Disability, the Optionee may exercise
his or her Option, but only within twelve (12) months from the date of such
termination (or such shorter period specified in the Option Agreement), and only
to the extent that the Optionee was entitled to exercise it at the date of such
termination (but in no event later than the expiration of the term of such
Option as set forth in the Option Agreement). If, at the date of termination,
the Optionee is not entitled to exercise his or her entire Option, the shares
covered by the unexercisable portion of the Option shall revert to the Plan. If,
after termination, the Optionee does not exercise his or her Option within the
time specified herein, the Option shall terminate, and the shares covered by
such Option shall revert to the Plan.
 
    (i)  DEATH OF OPTIONEE.  In the event of the death of an Optionee, the
Option may be exercised, at any time within twelve (12) months following the
date of death (or such shorter period specified in the Option Agreement) (but in
no event later than the expiration of the term of such Option as set forth in
the Option Agreement), by the Optionee's estate or by a person who acquired the
right to exercise the Option by bequest or inheritance, but only to the extent
the Optionee was entitled to exercise the Option at the date of death. If, at
the time of death, the Optionee was not entitled to exercise his or her entire
Option, the shares covered by the unexercisable portion of the Option shall
revert to the Plan. If, after death, the Optionee's estate or a person who
acquired the right to exercise the Option by bequest or inheritance does not
exercise the Option within the time specified herein, the Option shall
terminate, and the shares covered by such Option shall revert to the Plan.
 
    (j)  EARLY EXERCISE.  The Option may, but need not, include a provision
whereby the Optionee may elect at any time while an Employee or Consultant to
exercise the Option as to any part or all of the shares subject to the Option
prior to the full vesting of the Option. Any unvested shares so purchased may be
subject to a repurchase right in favor of the Company or to any other
restriction the Board determines to be appropriate.
 
    (k)  WITHHOLDING.  To the extent provided by the terms of an Option
Agreement, the Optionee may satisfy any federal, state or local tax withholding
obligation relating to the exercise of such Option by any of the following means
or by a combination of such means: (1) tendering a cash payment; (2) authorizing
the Company to withhold shares from the shares of the common stock otherwise
issuable to the participant as a result of the exercise of the Option; or (3)
delivering to the Company owned and unencumbered shares of the common stock of
the Company.
 
7.  COVENANTS OF THE COMPANY.
 
    (a) During the terms of the Options, the Company shall keep available at all
times the number of shares of stock required to satisfy such Options.
 
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    (b) The Company shall seek to obtain from each regulatory commission or
agency having jurisdiction over the Plan such authority as may be required to
issue and sell shares of stock upon exercise of the Options; provided, however,
that this undertaking shall not require the Company to register under the
Securities Act either the Plan, any Option or any stock issued or issuable
pursuant to any such Option. If, after reasonable efforts, the Company is unable
to obtain from any such regulatory commission or agency the authority which
counsel for the Company deems necessary for the lawful issuance and sale of
stock under the Plan, the Company shall be relieved from any liability for
failure to issue and sell stock upon exercise of such Options unless and until
such authority is obtained.
 
8.  USE OF PROCEEDS FROM STOCK.
 
    Proceeds from the sale of stock pursuant to Options shall constitute general
funds of the Company.
 
9.  MISCELLANEOUS.
 
    (a) The Board shall have the power to accelerate the time at which an Option
may first be exercised or the time during which an Option or any part thereof
will vest pursuant to subsection 6(e), notwithstanding the provisions in the
Option stating the time at which it may first be exercised or the time during
which it will vest.
 
    (b) Neither an Optionee nor any person to whom an Option is transferred
under subsection 6(d) shall be deemed to be the holder of, or to have any of the
rights of a holder with respect to, any shares subject to such Option unless and
until such person has satisfied all requirements for exercise of the Option
pursuant to its terms.
 
    (c) Nothing in the Plan or any instrument executed or Option granted
pursuant thereto shall confer upon any Employee, Consultant or Optionee any
right to continue in the employ of the Company or any Affiliate (or to continue
acting as a Consultant) or shall affect the right of the Company or any
Affiliate to terminate the employment or relationship as a Consultant of any
Employee, Consultant or Optionee with or without cause.
 
    (d) To the extent that the aggregate Fair Market Value (determined at the
time of grant) of stock with respect to which Incentive Stock Options are
exercisable for the first time by any Optionee during any calendar year under
all plans of the Company and its Affiliates exceeds one hundred thousand dollars
($100,000), the Options or portions thereof which exceed such limit (according
to the order in which they were granted) shall be treated as Nonstatutory Stock
Options.
 
10. ADJUSTMENTS UPON CHANGES IN STOCK.
 
    (a) If any change is made in the stock subject to the Plan, or subject to
any Option (through merger, consolidation, reorganization, recapitalization,
stock dividend, dividend in property other than cash, stock split, liquidating
dividend, combination of shares, exchange of shares, change in corporate
structure or otherwise), the Plan will be appropriately adjusted in the
class(es) and maximum number of shares subject to the Plan pursuant to
subsection 4(a) and the maximum number of shares subject to award to any person
during any calendar year period pursuant to subsection 5(d), and the outstanding
Options will be appropriately adjusted in the class(es) and number of shares and
price per share of stock subject to such outstanding Options.
 
    (b) In the event of: (1) a dissolution or liquidation of the Company; (2) a
merger or consolidation in which the Company is not the surviving corporation;
(3) a reverse merger in which the Company is the surviving corporation but the
shares of the Company's common stock outstanding immediately preceding the
merger are converted by virtue of the merger into other property, whether in the
form of securities, cash or otherwise; or (4) any other capital reorganization
in which more than fifty percent (50%) of the shares of the Company entitled to
vote are exchanged, then, at the sole discretion of the Board and to the extent
permitted by applicable law: (i) any surviving corporation shall assume any
Options outstanding
 
                                       7

under the Plan or shall substitute similar Options for those outstanding under
the Plan, (ii) the time during which such Options may be exercised shall be
accelerated and the Options terminated if not exercised prior to such event, or
(iii) such Options shall continue in full force and effect.
 
11. AMENDMENT OF THE PLAN.
 
    (a) The Board at any time, and from time to time, may amend the Plan.
However, except as provided in Section 10 relating to adjustments upon changes
in stock, no amendment shall be effective unless approved by the stockholders of
the Company within twelve (12) months before or after the adoption of the
amendment, where the amendment will:
 
        (i) Increase the number of shares reserved for options under the Plan;
 
        (ii) Effect (a) the repricing of any outstanding Options under the Plan
    and/or (b) the cancellation of any outstanding Options under the Plan and
    the grant in substitution therefor of new Options under the Plan covering
    the same or different numbers of shares of Common Stock;
 
       (iii) Modify the requirements as to eligibility for participation in the
    Plan (to the extent such modification requires stockholder approval in order
    for the Plan to satisfy the requirements of Section 422 of the Code); or
 
        (iv) Modify the Plan in any other way if such modification requires
    stockholder approval in order for the Plan to satisfy the requirements of
    Section 422 of the Code or to comply with the requirements of Rule 16b-3 or
    any Nasdaq or securities exchange listing requirements.
 
    (b) The Board may in its sole discretion submit any other amendment to the
Plan for stockholder approval, including, but not limited to, amendments to the
Plan intended to satisfy the requirements of Section 162(m) of the Code and the
regulations promulgated thereunder regarding the exclusion of performance-based
compensation from the limit on corporate deductibility of compensation paid to
certain executive officers.
 
    (c) It is expressly contemplated that the Board may amend the Plan in any
respect the Board deems necessary or advisable to provide Optionees with the
maximum benefits provided or to be provided under the provisions of the Code and
the regulations promulgated thereunder relating to Incentive Stock Options
and/or to bring the Plan and/or Incentive Stock Options granted under it into
compliance therewith.
 
    (d) Rights and obligations under any Option granted before amendment of the
Plan shall not be altered or impaired by any amendment of the Plan unless (i)
the Company requests the consent of the person to whom the Option was granted
and (ii) such person consents in writing.
 
12. TERMINATION OR SUSPENSION OF THE PLAN.
 
    (a) The Board may suspend or terminate the Plan at any time. Unless sooner
terminated, the Plan shall terminate on October 31, 2001. No Options may be
granted under the Plan while the Plan is suspended or after it is terminated.
 
    (b) Rights and obligations under any Option granted while the Plan is in
effect shall not be altered or impaired by suspension or termination of the
Plan, except with the consent of the person to whom the Option was granted.
 
13. EFFECTIVE DATE OF PLAN.
 
    The Plan shall become effective as determined by the Board, but no Options
granted under the Plan shall be exercised unless and until the stockholders of
the Company have approved the Plan.
 
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