Exhibit 10.50

REVENUE PERFORMANCE GOAL

GILEAD SCIENCES, INC.
PERFORMANCE SHARE AWARD AGREEMENT

RECITALS

A.    The Corporation has implemented the Plan for the purpose of providing
incentives to attract, retain and motivate eligible Employees, Directors and
Consultants to continue their service relationship with the Corporation.
B.    Participant is to render valuable services to the Corporation (or a
Related Entity), and this Agreement is executed pursuant to, and is intended to
carry out the purposes of, the Plan in connection with the Corporation's
issuance of shares of Common Stock to Participant thereunder.
C.    All capitalized terms in this Agreement shall have the meaning assigned to
them herein or in the attached Appendix A.
NOW, THEREFORE, it is hereby agreed as follows:
1.Grant of Performance Shares. The Corporation hereby awards to Participant, as
of the Award Date indicated below, an award (the “Award”) of Performance Shares
under the Corporation's 2004 Equity Incentive Plan, as amended (the “Plan”).
Each Performance Share which vests pursuant to the terms of this Agreement shall
provide Participant with the right to receive one or more shares of Common Stock
on the designated issuance date for those shares. The number of Performance
Shares subject to this Award. the applicable performance-vesting and
service-vesting requirements for each separate Tranche of those Performance
Shares, the date or dates on which the shares of Common Stock that vest
hereunder shall become issuable and the remaining terms and conditions governing
the Award, including the applicable vesting acceleration provisions, shall be as
set forth in this Agreement.

AWARD SUMMARY
Participant
[FIRST NAME MIDDLE NAME LAST NAME]
Award Date:
[GRANT DATE]
Designated Number of Performance Shares:
The actual number of shares of Common Stock that may become issuable pursuant to
the Performance Shares awarded under this Agreement shall be determined in
accordance with the performance-vesting and service-vesting provisions of
attached Schedule I. For purposes of the applicable calculations under Schedule
I, the total designated number of Performance Shares to be utilized is
[SHARES] shares (the” Performance Shares”).
 
The Performance Shares shall be divided into three separate Tranches, and one
third of the total number of Performance Shares shall be allocated to each such
Tranche.

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Vesting Schedule:
Normal Vesting. Each Tranche of Performance Shares shall be subject to the
performance-vesting and service-vesting requirements set forth for that
particular Tranche in attached Schedule I.
Change in Control Vesting. The shares of Common Stock underlying each Tranche of
Performance Shares may also vest on an accelerated basis in accordance with the
applicable provisions of Paragraph 4 of this Agreement should a Change in
Control occur after the start but prior to the completion of the Performance
Period or Service Period applicable to that particular Tranche.
Issuance Date:
The shares of Common Stock which actually vest and become issuable pursuant to
each Tranche of Performance Shares shall be issued in accordance with the
provisions of this Agreement applicable to the particular circumstances under
which such vesting occurs.

2.Limited Transferability. Prior to the actual issuance of the shares of Common
Stock which vest hereunder, Participant may not transfer any interest in the
Performance Shares subject to this Award or the underlying shares of Common
Stock or pledge or otherwise hedge the sale of those Performance Shares or
underlying shares, including (without limitation) any short sale or any
acquisition or disposition of any put or call option or other instrument tied to
the value of the underlying shares of Common Stock. However, any shares of
Common Stock which vest hereunder but otherwise remain unissued at the time of
Participant's death may be transferred pursuant to the provisions of
Participant's will or the laws of inheritance or to Participant's designated
beneficiary or beneficiaries of this Award. Participant may also direct the
Corporation to record the ownership of any shares of Common Stock which in fact
vest and become issuable hereunder in the name of a revocable living trust
established for the exclusive benefit of Participant or Participant and his or
her spouse. Participant may make such a beneficiary designation or ownership
directive at any time by completing the Corporation's Universal Beneficiary
Designation form and filing the completed form with the Plan Administrator or
its designee.
3.Stockholder Rights and Dividend Equivalents
(a)The holder of this Award shall not have any stockholder rights, including
voting, dividend or liquidation rights, with respect to the shares of Common
Stock subject to the Award until Participant becomes the record holder of those
shares upon their actual issuance following the Corporation's collection of the
applicable Withholding Taxes. Notwithstanding the foregoing, should any dividend
or other distribution, whether regular or extraordinary and whether payable in
cash, securities (other than Common Stock) or other property, be declared and
paid on the outstanding Common Stock while one or more Performance Shares remain
subject to this Award (i.e., the underlying shares of Common Stock are not
otherwise issued and outstanding for purposes of entitlement to the dividend or
distribution), then a special book account shall be established for Participant
and credited with a phantom dividend equivalent to the actual dividend or
distribution that would have been paid on the maximum number of shares of Common
Stock that can qualify as Performance-Qualified Shares under this Award, had
that number of shares been issued and outstanding and entitled to that dividend
or distribution. As one or more shares of Common Stock subsequently vest
hereunder upon the satisfaction of the applicable vesting requirements for those
shares, the phantom dividend equivalents credited to those particular shares in
the book account shall vest, and those vested dividend equivalents shall be
distributed to Participant (in the same form the actual dividend or distribution
was paid to the holders of the Common Stock entitled to that dividend or
distribution or in such other form as the Administrator deems appropriate under
the circumstances) concurrently with the issuance of those vested shares.
However, such distribution shall be subject to the Corporation's collection of
the Withholding Taxes applicable to that distribution. To the extent any phantom
dividend equivalents are to be distributed in shares of Common Stock, the
following conversion process will be in effect.  For each such

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dividend or distribution that is to be converted into shares of Common Stock,
the aggregate dollar value of the cash, securities or other property that would
have been paid as an actual dividend or distribution on the shares of Common
Stock subject to this Award had they been actually issued and outstanding shares
at the time of such dividend or distribution will be divided by the Fair Market
Value per share of Common Stock measured as of the date on which such dividend
or distribution was paid on the outstanding Common Stock, with any fractional
share of Common Stock rounded down to the next whole share of Common Stock.  The
Administrator shall have the sole discretion to determine the dollar value of
any such dividend or distribution paid other than in the form of cash, and its
determination shall be controlling.  
(b)To the extent the maximum number of shares of Common Stock that can qualify
as Performance-Qualified Shares under any Tranche of this Award is not in fact
earned by reason of the level at which the Performance Goal applicable to that
Tranche is actually attained, then the phantom dividend equivalents credited to
those unearned shares shall be cancelled, and Participant shall cease to have
any right or entitlement to receive any distributions or other amounts with
respect to those cancelled dividend equivalents.
(c)Should Participant cease Continuous Service without vesting in one or more of
the shares of Common Stock subject to this Award (including any shares which do
not otherwise vest at that time after taking into account any applicable vesting
acceleration provisions set forth in this Agreement and the attached Schedule
I), then the phantom dividend equivalents credited to those unvested shares
shall be cancelled, and Participant shall thereupon cease to have any further
right or entitlement to those cancelled amounts.
4.Change in Control. The following provisions shall apply only to the extent a
Change in Control is consummated prior to the completion of the one or more
separate Service Periods that are in effect at the time of such Change in
Control with respect to the individual Tranches into which the Performance
Shares are divided in accordance with the provisions of Paragraph 1 of this
Agreement and attached Schedule I:
(a)Should (i) the Change in Control occur during a Performance Period that is in
effect at the time with respect to a particular Tranche of Performance Shares
but prior to the completion of that Performance Period and (ii) Participant
remain in Continuous Service through the effective date of that Change in
Control, then Participant shall immediately vest in that number of shares of
Common Stock equal to the designated number of Performance Shares allocated to
that particular Tranche in accordance with Paragraph 1 of this Agreement and the
provisions of attached Schedule I, without any measurement of Performance Goal
attainment to date with respect to that particular Tranche. To the extent a
Performance Period for a particular Tranche of Performance Shares has not
commenced prior to the effective date of the Change in Control, the Performance
Shares allocated to that Tranche in accordance with Paragraph 1 of this
Agreement and the provisions of attached Schedule I shall be cancelled, and
Participant shall not have any further right or entitlement to receive any
shares of Common Stock with respect to those cancelled Performance Shares.
(b)Should (i) the Change in Control occur at any time on or after the completion
of the Performance Period applicable to a particular Tranche of Performance
Shares but prior to the completion of the Service Period specified for that
Tranche in attached Schedule I and (ii) Participant remain in Continuous Service
through the effective date of that Change in Control, then Participant shall
immediately vest in the number of shares of Common Stock equal to the number of
Performance-Qualified Shares (if any) at the time subject to that Tranche by
reason of the level at which the Revenue Performance Goal for that Tranche was
in fact attained for the Performance Period applicable to that Tranche.

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(c)Subparagraphs (a) and (b) of this Paragraph 4 shall also apply should
Participant's Continuous Service terminate, by reason of an involuntary
termination other than for Cause or his or her resignation due to Constructive
Termination, at any time during the period beginning with the execution date of
the definitive agreement for the Change in Control transaction and ending with
the earlier of (i) the effective date of that Change in Control or (ii) the
termination of the definitive agreement without the consummation of the Change
in Control; provided, however, that in no event shall Participant become
entitled to any shares of Common Stock pursuant to this Paragraph 4 if the
Change in Control is not in fact consummated.
(d)Should Participant cease Continuous Service by reason of Retirement, death or
Permanent Disability during one or more Service Periods that are, pursuant to
the provisions of attached Schedule I, in effect at that time with respect to
one or more Tranches of Performance Shares and a Change in Control subsequently
occur prior to the completion of each such applicable Service Period, then
Participant shall, at the time of such Change in Control, vest in a pro-rated
number of shares of Common Stock calculated by multiplying (i) the number of
Performance Shares or Performance-Qualified Shares (if any) determined for each
such Tranche in accordance with the applicable provisions of subparagraphs (a)
and (b) of this Paragraph 4 by (ii) a fraction, the numerator of which is the
number of months of Continuous Service actually completed by Participant in the
applicable Service Period for such Tranche (rounded to the closest whole month),
and the denominator of which is the number of months (rounded to the closest
whole number) comprising the portion of that Service Period ending with the
effective date of the Change in Control.
(e)The number of shares of Common Stock in which Participant vests on the basis
of the Performance Shares or Performance-Qualified Shares determined in
accordance with the foregoing provisions of this Paragraph 4 shall be converted
into the right to receive for each such share the same consideration per share
of Common Stock payable to the other stockholders of the Corporation in
consummation of the Change in Control, and such consideration shall be
distributed to Participant on the earlier of (i) the tenth (10th) business day
following the effective date of the Change in Control, provided such Change in
Control also constitutes a Qualifying Change in Control, or (ii) the date those
shares would have been issued to Participant in accordance with Paragraph 6 in
the absence of such Change in Control, unless a later issuance date is in effect
for those shares pursuant to any deferral election made by Participant pursuant
to Paragraph 7. Each issuance or distribution made under this Paragraph 4(e)
shall be subject to the Corporation's collection of the applicable Withholding
Taxes.
(f)Except for the actual number of shares of Common Stock in which Participant
vests in accordance with this Paragraph 4, Participant shall cease to have any
further right or entitlement to any additional shares of Common Stock under this
Agreement following the effective date of the Change in Control.
5.Adjustment in Shares. Should any change be made to the Common Stock by reason
of any stock split, stock dividend, recapitalization, combination of shares,
exchange of shares, spin-off transaction, extraordinary dividend or distribution
or other change affecting the outstanding Common Stock as a class without the
Corporation's receipt of consideration, or should the value of the outstanding
shares of Common Stock be substantially reduced as a result of a spin-off
transaction or an extraordinary dividend or distribution, or should there occur
any merger, consolidation or other reorganization, then equitable adjustments
shall be made by the Administrator to the total number and/or class of
securities issuable pursuant to this Award in order to reflect such change. In
making such equitable adjustments, the Administrator shall take into account any
amounts credited to Participant's book account under Paragraph 3(a) in
connection with the transaction, and the determination of the Administrator
shall be final, binding and conclusive. In the event of any Change in Control
transaction, the provisions of Paragraph 4 shall be controlling.

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6.Issuance or Distribution of Vested Shares or Other Amounts.
(a)Except as otherwise provided in Paragraph 4 or Paragraph 7, the shares of
Common Stock in which Participant vests pursuant to the performance-vesting and
Continuous Service vesting provisions of attached Schedule I shall be issued in
accordance with the following provisions:
-    The shares of Common Stock underlying each particular Tranche of
Performance Shares shall be effected during the period beginning with the first
business day of the calendar year immediately succeeding the end of the Service
Period specified for that Tranche in attached Schedule I and ending no later
than March 15 of that calendar year.
(b)The Corporation shall, on the applicable issuance date, issue to or on behalf
of Participant a certificate in electronic form for the shares of Common Stock
in which Participant vests pursuant to the performance-vesting and Continuous
Service vesting provisions of attached Schedule I and shall concurrently
distribute to Participant any phantom dividend equivalents with respect to those
Shares. In lieu of such electronic delivery of the shares, Participant may
request actual stock certificates for those shares.
(c)Except as otherwise provided in Paragraph 4, no shares of Common Stock shall
be issued prior to the completion of the Service Period applicable to those
shares. No fractional shares of Common Stock shall be issued pursuant to this
Award, and any fractional share resulting from any calculation made in
accordance with the terms of this Agreement shall be rounded down to the next
whole share.
(d)Regardless of any action the Corporation and/or the Employer take with
respect to any or all Withholding Taxes related to Participant's participation
in the Plan and legally applicable to Participant, Participant acknowledges that
the ultimate liability for all Withholding Taxes is and remains Participant's
responsibility and may exceed the amount actually withheld by the Corporation or
the Employer. Participant further acknowledges that the Corporation and/or the
Employer (i) make no representations or undertakings regarding the treatment of
any Withholding Taxes in connection with any aspect of the Award, including the
grant, vesting or settlement of the Award, the issuance of shares of Common
Stock or other property in settlement of the Award, the subsequent sale of the
shares of Common Stock acquired pursuant to such issuance and the receipt of any
dividends and/or phantom dividend equivalents and (ii) do not commit to, and are
under no obligation to, structure the terms of the grant or any aspect of the
Award to reduce or eliminate Participant's liability for Withholding Taxes or
achieve any particular tax result. Further, if Participant has become subject to
Withholding Taxes in more than one jurisdiction between the Award Date and the
date of any relevant taxable or tax withholding event (as applicable),
Participant acknowledges that the Corporation and/or the Employer (or former
employer, as applicable) may be required to withhold or account for Withholding
Taxes in more than one jurisdiction.
(e)The Corporation shall collect, and Participant hereby authorizes the
Corporation to collect, the Withholding Taxes with respect to the shares of
Common Stock issued under this Agreement (including shares of Common Stock
issued in settlement of phantom dividend equivalents) through an automatic share
withholding procedure pursuant to which the Corporation will withhold,
immediately as the shares of Common Stock are issued under the Award, a portion
of those shares with a Fair Market Value (measured as of the issuance date)
equal to the amount of such Withholding Taxes (the “Share Withholding Method”).
Notwithstanding the foregoing, the Share Withholding Method shall not be
utilized if (i) such method is not permissible or advisable under local law or
(ii) the Corporation otherwise decides no longer to utilize such method and
provides Participant with notice to such effect.

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(f)If the Share Withholding Method is to be utilized for the collection of
Withholding Taxes, then the Corporation shall withhold the number of otherwise
issuable shares of Common Stock necessary to satisfy the applicable Withholding
Taxes based on the applicable minimum statutory rate or other applicable
withholding rate. If the obligation for Withholding Taxes is satisfied by using
the Share Withholding Method, then Participant will, for tax purposes, be deemed
to have been issued the full number of shares of Common Stock subject to the
vested Award, notwithstanding that a number of shares of Common Stock are
withheld solely for the purpose of paying the applicable Withholding Taxes.
(g)The Corporation shall have sole discretion to determine whether or not the
Share Withholding Method shall be utilized for the collection of the applicable
Withholding Taxes. Participant shall be notified (in writing or through the
Corporation's electronic mail system) in the event the Corporation no longer
intends to utilize the Share Withholding Method. Should any shares of Common
Stock become issuable under the Award (including shares of Common Stock issued
in settlement of phantom dividend equivalents) at a time when the Share
Withholding Method is not being utilized by the Corporation, then the
Withholding Taxes shall be collected from Participant through a sale-to-cover
transaction authorized by Participant, pursuant to which an immediate
open-market sale of a portion of the shares of Common Stock issued to
Participant will be effected, for and on behalf of Participant, by the
Corporation's designated broker to cover the Withholding Tax liability estimated
by the Corporation to be applicable to such issuance. Participant shall,
promptly upon request from the Corporation, execute (whether manually or through
electronic acceptance) an appropriate sales authorization (in form and substance
reasonably satisfactory to the Corporation) that authorizes and directs the
broker to effect such open-market, sale-to-cover transactions and remit the sale
proceeds, net of brokerage fees and other applicable charges, to the Corporation
in satisfaction of the applicable Withholding Taxes. However, no sale-to-cover
transaction shall be effected unless (i) such a sale is at the time permissible
under the Corporation's insider trading policies governing the sale of Common
Stock and (ii) the transaction is not otherwise deemed to constitute a
prohibited loan under Section 402 of the Sarbanes-Oxley Act of 2002.
(h)If the Corporation determines that such sale-to-cover transaction is not
permissible or advisable at the time or if Participant otherwise fails to effect
a timely sales authorization as required by this Agreement, then the Corporation
may, in its sole discretion, elect either to defer the issuance of the shares of
Common Stock until such sale-to-cover transaction can be effected in accordance
with Participant's executed sale directive or to collect the applicable
Withholding Taxes through a wire transfer of funds from Participant to the
Corporation in the amount of such Withholding Taxes or by withholding such
amount from other wages payable to Participant. In no event shall any shares of
Common Stock be issued in the absence of an arrangement reasonably satisfactory
to the Corporation for the satisfaction of the applicable Withholding Taxes, and
any such arrangement must be in compliance with any applicable requirements of
Code Section 409A.
(i)The Corporation shall collect the Withholding Taxes with respect to the
phantom dividend equivalents distributed in a form other than shares of Common
Stock by withholding a portion of that distribution equal to the amount of the
applicable Withholding Taxes, with the cash portion of the distribution to be
the first portion so withheld, or through such other tax withholding arrangement
as the Corporation deems appropriate
(j)Notwithstanding the foregoing provisions of Paragraphs 6(d) through 6(h), the
employee portion of the federal, state and local employment taxes required to be
withheld by the Corporation in connection with the vesting of the shares of
Common Stock or any other amounts hereunder (the “Employment Taxes”) shall in
all events be collected from Participant no later than the last business day of
the calendar year in which those shares or other amounts vest hereunder.
Accordingly, to the extent the applicable issuance date for one or more vested
shares of Common Stock or the distribution date for such

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other amounts is to occur in a year subsequent to the calendar year in which
those shares or other amounts vest, Participant shall, on or before the last
business day of the calendar year in which such shares or other amounts vest,
deliver to the Corporation a check payable to its order (or a wire transfer of
funds to the Corporation) in the dollar amount equal to the Employment Taxes
required to be withheld with respect to those shares or other amounts. The
provisions of this Paragraph 6(j) shall be applicable only to the extent
necessary to comply with the applicable tax withholding requirements of Code
Section 3121(v).
(k)Except as otherwise provided in Paragraph 4 or this Paragraph 6, the
settlement of all Performance Shares or Performance-Qualified Shares which vest
under the Award shall be made solely in shares of Common Stock.
7.Special Deferral Election. Provided Participant is a U.S. tax resident and
subject to Participant's satisfaction of any applicable Withholding Tax
obligations under Paragraph 6 and any other eligibility requirements established
by the Administrator for a deferral election hereunder, Participant may elect to
defer the issuance date of any shares of Common Stock which may become issuable
to Participant pursuant to the terms of this Agreement, by submitting to the
Corporation on a timely basis a deferral election in the form provided for such
purpose. Such deferral election must be submitted to the Corporation prior to
the last six (6) months of the Performance Period (including any abbreviated
Performance Period) applicable to the shares for which the deferral election is
made, and any deferral election submitted within that six (6)-month period or
after the performance-based compensation subject to that election has become
ascertainable shall have no force and effect. The deferral election must specify
one or more deferred issuance dates or events that qualify as permissible
distribution events under Code Section 409A and the Treasury Regulations
thereunder. In submitting such deferral election, Participant must represent
that he or she understands the effect of such deferral under relevant federal,
state and local income and employment tax laws, including (without limitation)
the fact that Social Security, Medicare and other taxes may be due upon the
vesting of the shares of Common Stock notwithstanding the deferral election. In
no event may such a deferral election be made after Participant's cessation of
Continuous Service, and no deferral election shall have any force or effect
unless such election complies with all applicable requirements of Code Section
409A and the Treasury Regulations thereunder.
8.Leaves of Absence. For purposes of applying the various Continuous Service
vesting provisions of this Agreement, Participant shall be deemed to cease
Continuous Service on the commencement date of any leave of absence and not to
remain in Continuous Service status during the period of that leave, except to
the extent otherwise required under employment laws in the jurisdiction where
Participant is employed or pursuant to the following policy:
-    Participant shall be deemed to remain in Continuous Service status during
(i) the first three (3) months of an approved personal leave of absence or (ii)
the first seven (7) months of any bona fide leave of absence (other than an
approved personal leave) and shall be deemed to cease Continuous Service upon
the expiration of the applicable three (3)-month or seven (7)-month period.
-    In no event, however, shall Participant be deemed, for vesting purposes
hereunder, to remain in Continuous Service beyond the earlier of (i) the
expiration date of that leave of absence, unless Participant returns to active
Continuous Service or Employee status on or before that date, or (ii) the date
Participant's Continuous Service or Employee status actually terminates by
reason of his or her voluntary or involuntary termination or by reason of his or
her death or disability.

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9.Compliance with Laws and Regulations. The issuance of shares of Common Stock
pursuant to the Award shall be subject to compliance by the Corporation and
Participant with all Applicable Laws relating thereto.
10.Notices. Any notice required to be given or delivered to the Corporation
under the terms of this Agreement shall be in writing and addressed to the
Corporation at its principal corporate offices. Any notice required to be given
or delivered to Participant shall be in writing and addressed to Participant at
the most current address then indicated for Participant on the Corporation's
employee records or shall be delivered electronically to Participant through the
Corporation's electronic mail system or through an on-line brokerage firm
authorized by the Corporation to effect sales of the Common Stock issued
hereunder. All notices shall be deemed effective upon personal delivery or
delivery through the Corporation's electronic mail system or upon deposit in the
U.S. mail, postage prepaid and properly addressed to the party to be notified.
11.Successors and Assigns. Except to the extent otherwise provided in this
Agreement, the provisions of this Agreement shall inure to the benefit of, and
be binding upon, the Corporation and its successors and assigns and Participant,
Participant's assigns, the legal representatives, heirs and legatees of
Participant's estate and any beneficiaries of the Award designated by
Participant.
12.Code Section 409A     
(a)It is the intention of the parties that the provisions of this Agreement
shall, to the maximum extent permissible, comply with the requirements of the
short-term deferral exception to Section 409A of the Code and Treasury
Regulations Section 1.409A-1(b)(4) with respect to each Tranche of Performance
Shares under this Award. Accordingly, to the extent there is any ambiguity as to
whether one or more provisions of this Agreement would otherwise contravene the
requirements or limitations of Code Section 409A applicable to such short-term
deferral exception, then those provisions, as they apply to each Tranche, shall
be interpreted and applied in a manner that does not result in a violation of
the requirements or limitations of Code Section 409A and the Treasury
Regulations thereunder that apply to such exception.
(b)However, to the extent this Agreement should be deemed to create a deferred
compensation arrangement subject to the requirements of Code Section 409A with
respect to one or more Tranches of the Performance Shares, whether by reason of
any deferral election made pursuant to Paragraph 7 above or the pro-rata
service-vesting provisions of this Agreement, then the following provisions
shall apply with respect to any such Tranche, notwithstanding anything to the
contrary set forth herein:
-    No shares of Common Stock or other amounts which become issuable or
distributable with respect to such Tranche by reason of Participant's cessation
of Continuous Service shall actually be issued or distributed to Participant
until the date of Participant's Separation from Service or as soon thereafter as
administratively practicable, but in no event later than the later of (i) the
close of the calendar year in which such Separation from Service occurs or (ii)
the fifteenth day of the third calendar month following the date of such
Separation from Service.
-    No shares of Common Stock or other amounts which become issuable or
distributable with respect to such Tranche by reason of Participant's cessation
of Continuous Service shall actually be issued or distributed to Participant
prior to the earlier of (i) the first day of the seventh (7th) month following
the date of Participant's Separation from Service or (ii) the date of
Participant's death, if Participant is deemed at the time of such Separation
from Service to be a specified employee under Section 1.409A-1(i) of the
Treasury Regulations

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issued under Code Section 409A, as determined by the Administrator in accordance
with consistent and uniform standards applied to all other Code Section 409A
arrangements of the Corporation, and such delayed commencement is otherwise
required in order to avoid a prohibited distribution under Code Section
409A(a)(2). The deferred shares of Common Stock or other distributable amount
shall be issued or distributed in a lump sum on the first day of the seventh
(7th) month following the date of Participant's Separation from Service or, if
earlier, the first day of the month immediately following the date the
Corporation receives proof of Participant's death.
-    No amounts that vest and become payable under Paragraph 4 of this Agreement
with respect to that Tranche by reason of a Change in Control shall be
distributed to Participant at the time of such Change in Control, unless that
transaction also constitutes a Qualifying Change in Control. In the absence of
such a Qualifying Change in Control, the distribution shall not be made until
the date on which the shares to which those amounts pertain would have become
issuable in accordance with the provisions of Paragraph 6(a) of this Agreement.
-    If Participant has made a deferral election under Paragraph 7 of this
Agreement with respect to any Tranche of Performance Shares under this Award, no
amounts that vest and become payable under Paragraph 4 with respect to that
particular Tranche by reason of a Change in Control shall be distributed to
Participant at the time of that Change in Control unless (i) the transaction
also constitutes a Qualifying Change in Control and (ii) such deferral election
provides for a distribution upon such an event. In the absence of such a
Qualifying Change in Control or distribution election tied thereto, the
distribution shall not be made until the date on which the shares of Common
Stock to which those amounts pertain would have become issuable in accordance
with Participant's deferral election under Paragraph 7 of this Agreement.
-     The shares of Common Stock that are issuable pursuant to each Tranche of
Performance Shares in accordance with the provisions of this Agreement and
attached Schedule I shall be deemed a separate payment for purposes of Code
Section 409A.
13.Construction. This Agreement and the Award evidenced hereby are made and
granted pursuant to the Plan and are in all respects limited by and subject to
the terms of the Plan. In the event of any conflict between the provisions of
this Agreement and the terms of the Plan, the terms of the Plan shall be
controlling. All decisions of the Administrator with respect to any question or
issue arising under the Plan or this Agreement shall be conclusive and binding
on all persons having an interest in the Award.
14.Governing Law/Venue. The interpretation, performance and enforcement of this
Agreement shall be governed by the laws of the State of Delaware without resort
to that State's conflict-of-laws rules. For purposes of any action, lawsuit or
other proceedings brought to enforce this Agreement or otherwise relating to or
arising from this Agreement, the parties hereby submit to and consent to the
sole and exclusive jurisdiction of the courts of San Mateo County, California,
or the federal courts for the United States for the Northern District of
California, and no other courts, where this grant is made and/or to be
performed.
15.Employment at Will. Nothing in this Agreement or in the Plan shall confer
upon Participant any right to remain in Continuous Service for any period of
specific duration or interfere with or otherwise restrict in any way the rights
of the Corporation (or any Related Entity employing or retaining

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Participant) or of Participant, which rights are hereby expressly reserved by
each, to terminate Participant's Continuous Service at any time for any reason,
with or without Cause.
16.Plan Prospectus. The official prospectus for the Plan is available on the
Corporation's intranet at: http://gnet/ HR/stocks_new.asp. Participant may also
obtain a printed copy of the prospectus by contacting Stock Plan Services at
stockplanservices@gilead.com.
17.Electronic Delivery and Acceptance. The Corporation may, in its sole
discretion, decide to deliver any documents related to current or future
participation in the Plan by electronic means. Participant hereby consents to
receive such documents by electronic delivery and agrees to participate in the
Plan through an on-line or electronic system established and maintained by the
Corporation or a third party designated by the Corporation.
18.Severability. The provisions of this Agreement are severable and if any one
or more provisions are determined to be illegal or otherwise unenforceable, in
whole or in part, the remaining provisions shall nevertheless be binding and
enforceable.
19.Waiver. Participant acknowledges that a waiver by the Corporation of breach
of any provision of this Agreement shall not operate or be construed as a waiver
of any other provision of this Agreement, or of any subsequent breach of this
Agreement.
20.Participant Acceptance. Participant must accept the terms and conditions of
this Agreement either electronically through the electronic acceptance procedure
established by the Corporation or through a written acceptance delivered to the
Corporation in a form satisfactory to the Corporation. In no event shall any
shares of Common Stock be issued (or other securities or property distributed)
under this Agreement in the absence of such acceptance.

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IN WITNESS WHEREOF, Gilead Sciences, Inc. has caused this Agreement to be
executed on its behalf by its duly-authorized officer on the day and year first
indicated above.

GILEAD SCIENCES, INC.
 
 
By:
 
Title:
 

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APPENDIX A
DEFINITIONS
The following definitions shall be in effect under the Agreement:
A.Administrator shall mean the Compensation Committee of the Board acting in its
capacity as administrator of the Plan.
B.Agreement shall mean this Performance Share Award Agreement.
C.Applicable Laws shall mean the legal requirements related to the Plan and the
Award under applicable provisions of the federal securities laws, state
corporate and securities laws, the Code, the rules of any applicable Stock
Exchange on which the Common Stock is listed for trading, and the rules of any
non-U.S. jurisdiction applicable to Awards granted to residents therein.
D.Award shall mean the award of Performance Shares made to Participant pursuant
to the terms of this Agreement.
E.Award Date shall mean the date the Performance Shares are awarded to
Participant pursuant to the Agreement and shall be the date indicated in
Paragraph 1 of the Agreement.
F.Board shall mean the Corporation's Board of Directors.
G.Cause shall have the meaning assigned to such term in Section 11(c) of the
Plan.
H.Change in Control shall mean a change in ownership or control of the
Corporation effected through the consummation of any of the following
transactions:
(i)a merger, consolidation or other reorganization approved by the Corporation's
stockholders, unless securities representing more than fifty percent (50%) of
the total combined voting power of the voting securities of the successor
corporation are immediately thereafter beneficially owned, directly or
indirectly and in substantially the same proportion, by the persons who
beneficially owned the Corporation's outstanding voting securities immediately
prior to such transaction;
(ii)a sale, transfer or other disposition of all or substantially all of the
Corporation's assets;
(iii)the closing of any transaction or series of related transactions pursuant
to which any person or any group of persons comprising a “group” within the
meaning of Rule 13d-5(b)(1) of the 1934 Act (other than the Corporation or a
person that, prior to such transaction or series of related transactions,
directly or indirectly controls, is controlled by or is under common control
with, the Corporation) becomes directly or indirectly (whether as a result of a
single acquisition or by reason of one or more acquisitions within the twelve
(12)-month period ending with the most recent acquisition) the beneficial owner
(within the meaning of Rule 13d-3 of the 1934 Act) of securities possessing (or
convertible into or exercisable for securities possessing) more than fifty
percent (50%) of the total combined voting power of the Corporation's
outstanding securities (as measured in terms of the power to vote with respect
to the election of Board members) outstanding immediately after the

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consummation of such transaction or series of related transactions, whether such
transaction involves a direct issuance from the Corporation or the acquisition
of outstanding securities held by one or more of the Corporation's existing
stockholders; or
(iv)a change in the composition of the Board over a period of twelve (12)
consecutive months or less such that a majority of the Board members ceases, by
reason of one or more contested elections for Board membership, to be comprised
of individuals who either (A) have been Board members continuously since the
beginning of such period or (B) have been elected or nominated for election as
Board members during such period by at least a majority of the Board members
described in clause (A) who were still in office at the time the Board approved
such election or nomination.
In no event, however, shall a Change in Control be deemed to occur upon a
merger, consolidation or other reorganization effected primarily to change the
State of the Corporation's incorporation or to create a holding company
structure pursuant to which the Corporation becomes a wholly-owned subsidiary of
an entity whose outstanding voting securities immediately after its formation
are beneficially owned, directly or indirectly and in substantially the same
proportion, by the persons who beneficially owned the Corporation's outstanding
voting securities immediately prior to the formation of such entity. Should such
holding company structure or other Parent entity be established for the
Corporation, then subparagraph (iv) shall be applied solely to the board of
directors of that holding company or Parent entity.
I.    Code shall mean the Internal Revenue Code of 1986, as amended.
J.    Common Stock shall mean shares of the Corporation's common stock.
K.    Constructive Termination shall have the meaning assigned to such term in
Section 11(d) of the Plan.
L.    Consultant shall mean any person, including an advisor, who is compensated
by the Corporation or any Related Entity for services performed as a
non-employee consultant; provided, however, that the term “Consultant” shall not
include non-employee Directors serving in their capacity as Board members. The
term “Consultant” shall include a member of the board of directors of a Related
Entity.
M.    Continuous Service shall mean the performance of services for the
Corporation or a Related Entity (whether now existing or subsequently
established) by a person in the capacity of an Employee, Director or Consultant.
For purposes of this Agreement, Participant shall be deemed to cease Continuous
Service immediately upon the occurrence of either of the following events: (i)
Participant no longer performs services in any of the foregoing capacities for
the Corporation or any Related Entity or (ii) the entity for which Participant
is performing such services ceases to remain a Related Entity of the
Corporation, even though Participant may subsequently continue to perform
services for that entity. The Administrator shall have the exclusive discretion
to determine when Participant ceases Continuous Service for purposes of the
Award.
N.    Corporation shall mean Gilead Sciences, Inc., a Delaware corporation, and
any successor corporation to all or substantially all of the assets or voting
stock of Gilead Sciences, Inc. which shall by appropriate action adopt the Plan.
O.    Director shall mean a member of the Board.

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P.    Employee shall mean an individual who is in the employ of the Corporation
(or any Related Entity), subject to the control and direction of the employer
entity as to both the work to be performed and the manner and method of
performance.
Q.    Employer shall mean the Corporation or any Related Entity employing
Participant.
R.    Fair Market Value per share of Common Stock on any relevant date shall be
the closing price per share of Common Stock (or the closing bid, if no sales
were reported) on that date, as quoted on the Stock Exchange that is at the time
serving as the primary trading market for the Common Stock; provided, however,
that if there is no reported closing price or closing bid for that date, then
the closing price or closing bid, as applicable, for the last trading date on
which such closing price or closing bid was quoted shall be determinative of
such Fair Market Value. The applicable quoted price shall be as reported in The
Wall Street Journal or such other source as the Administrator deems reliable.
S.    1934 Act shall mean the Securities Exchange Act of 1934, as amended from
time to time.
T.    Participant shall mean the person to whom the Award is made pursuant to
the Agreement.
U.    Parent shall mean any corporation (other than the Corporation) in an
unbroken chain of corporations ending with the Corporation, provided each
corporation in the unbroken chain (other than the Corporation) owns, at the time
of the determination, stock possessing fifty percent (50%) or more of the total
combined voting power of all classes of stock in one of the other corporations
in such chain.
V.    Performance Goal shall, with respect to each separate Tranche of
Performance Shares, mean the net product revenue performance goal established or
to be established for that Tranche at one or more designated levels of
attainment in accordance with the provisions of attached Schedule I (the
“Revenue Performance Goal”) that must be subsequently attained in order to
satisfy the performance-vesting requirement for the shares of Common Stock
allocated to that particular Tranche.
W.    Performance Period shall mean the one-year period specified on attached
Schedule I for each separate Tranche of Performance Shares over which the
attainment of the Revenue Performance Goal applicable to that particular Tranche
is to be measured.
X.    Performance-Qualified Shares shall, with respect to each separate Tranche
of Performance Shares, mean the maximum number of shares of Common Stock in
which Participant can vest based on the level at which the Performance Goal
applicable to that particular Tranche is in fact attained and shall be
calculated in accordance with the provisions of attached Schedule I. Each
Performance-Qualified Share that vests pursuant to the terms of the Award shall
entitle Participant to receive one share of Common Stock.
Y.    Performance Shares shall mean the number of phantom shares of Common Stock
that shall be applied to the calculation of the maximum number of
Performance-Qualified Shares (if any) based on the level at which the
Performance Goal for each Tranche of Performance Shares is in fact attained over
the applicable Performance Period for that Tranche.

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Z.    Permanent Disability shall mean the inability of Participant to engage in
any substantial gainful activity by reason of any medically determinable
physical or mental impairment expected to result in death or to be of continuous
duration of twelve (12) months or more.
AA.    Plan shall mean the Corporation's 2004 Equity Incentive Plan, as amended.
BB.    Qualifying Change in Control shall mean a change in control of ownership
of the Corporation effected by one or more of the following transactions:
(i)a merger or consolidation in which the Corporation is not the surviving
entity and in which one person or a group of related persons (other than the
Corporation or a person that directly or indirectly controls, is controlled by,
or is under common control with, the Corporation) acquires ownership of
securities possessing more than fifty percent (50%) of the total combined voting
power of the Corporation's outstanding securities or constituting more than
fifty percent (50%) of the total fair market value of the Corporation's
outstanding securities;
(ii)the sale, transfer or other disposition of all or substantially all of the
assets of the Corporation in complete liquidation or dissolution of the
Corporation;
(iii)any reverse merger in which the Corporation is the surviving entity but in
which one person or a group of related persons (other than the Corporation or a
person that directly or indirectly controls, is controlled by, or is under
common control with, the Corporation) acquires ownership of securities
possessing more than fifty percent (50%) of the total combined voting power of
the Corporation's outstanding securities or constituting more than fifty percent
(50%) of the total fair market value of the Corporation's outstanding
securities;
(iv)the acquisition, directly or indirectly, by any person or related group of
persons (other than the Corporation or a person that directly or indirectly
controls, is controlled by, or is under common control with, the Corporation) of
beneficial ownership of securities possessing more than fifty percent (50%) of
the total combined voting power of the Corporation's outstanding securities or
constituting more than fifty percent (50%) of the total fair market value of the
Corporation's outstanding securities pursuant to a tender or exchange offer made
directly to the Corporation's stockholders; or
(v)a change in the composition of the Board over a period of twelve (12)
consecutive months or less such that a majority of the Board members ceases, by
reason of one or more contested elections for Board membership, to be comprised
of individuals who either (A) have been Board members continuously since the
beginning of such period or (B) have been elected or nominated for election as
Board members during such period by at least a majority of the Board members
described in clause (A) who were still in office at the time the Board approved
such election or nomination.
The foregoing definition of Qualifying Change in Control shall in all instances
be applied and interpreted in such manner that the applicable Qualifying Change
in Control transaction that serves as an issuance event for the shares of Common
Stock subject to this Award (or distribution event for any amounts relating to
those shares) that vest upon the occurrence of a Change in Control and are
otherwise at the time subject to the issuance or distribution restrictions of
Code Section 409A will also qualify as: (i) a change in the ownership of the
Corporation, as determined in accordance with Section 1.409A-3(i)(5)(v) of the
Treasury

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Regulations, (ii) a change in the effective control of the Corporation, as
determined in accordance with Section 1.409A-3(i)(5)(vi) of the Treasury
Regulations, or (iii) a change in the ownership of a substantial portion of the
assets of the Corporation, as determined in accordance with Section
1.409A-3(i)(5)(vii) of the Treasury Regulations.
CC.    Related Entity shall mean (i) any Parent or Subsidiary of the Corporation
and (ii) any corporation in an unbroken chain of corporations beginning with the
Corporation and ending with the corporation in the chain for which Participant
provides services as an Employee, Director or Consultant, provided each
corporation in such chain owns securities representing at least fifty percent
(50%) of the total outstanding voting power of the outstanding securities of
another corporation or entity in such chain.
DD.    Retirement shall mean Participant's cessation of Employee status on or
after the date on which his or her combined age and years of Continuous Service
equal or exceed seventy (70) years.
EE.    Separation from Service shall mean Participant's cessation of Employee
status by reason of his or her death, retirement or termination of employment.
Participant shall be deemed to have terminated employment for such purpose at
such time as the level of his or her bona fide services to be performed as an
Employee (or as a consultant or independent contractor) permanently decreases to
a level that is not more than twenty percent (20%) of the average level of
services he or she rendered as an Employee during the immediately preceding
thirty-six (36) months (or such shorter period for which he or she may have
rendered such services). Solely for purposes of determining when a Separation
from Service occurs, Participant will be deemed to continue in “Employee” status
for so long as he or she remains in the employ of one or more members of the
Employer Group, subject to the control and direction of the employer entity as
to both the work to be performed and the manner and method of performance.
“Employer Group” means the Corporation and any Parent or Subsidiary and any
other corporation or business controlled by, controlling or under common control
with, the Corporation, as determined in accordance with Sections 414(b) and (c)
of the Code and the Treasury Regulations thereunder, except that in applying
Sections 1563(1), (2) and (3) of the Code for purposes of determining the
controlled group of corporations under Section 414(b), the phrase “at least 50
percent” shall be used instead of “at least 80 percent” each place the latter
phrase appears in such sections and in applying Section 1.414(c)-2 of the
Treasury Regulations for purposes of determining trades or businesses that are
under common control for purposes of Section 414(c), the phrase “at least 50
percent” shall be used instead of “at least 80 percent” each place the latter
phrase appears in Section 1.414(c)-2 of the Treasury Regulations. Any such
determination as to Separation from Service, however, shall be made in
accordance with the applicable standards of the Treasury Regulations issued
under Section 409A of the Code.
FF.    Service Period shall, with respect to each Tranche of Performance Shares,
mean the applicable service period specified for that particular Tranche in
attached Schedule I over which the Continuous Service vesting requirement in
effect for that Tranche is to be measured.
GG.    Stock Exchange shall mean the American Stock Exchange, the Nasdaq Global
or Global Select Market or the New York Stock Exchange.
HH.    Subsidiary shall mean any corporation (other than the Corporation) in an
unbroken chain of corporations beginning with the Corporation, provided each
corporation (other than the last corporation) in the unbroken chain owns, at the
time of the determination, stock possessing fifty percent (50%) or more of the
total combined voting power of all classes of stock in one of the other
corporations in such chain.

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II.    Tranche shall mean the three separate tranches (Tranche One, Tranche Two
and Tranche Three) into which the Performance Shares subject to this Award are
divided in accordance with the provisions of Paragraph 1 of this Agreement and
attached Schedule I.
JJ.    Withholding Taxes shall mean the federal, state and local income taxes
and the employee portion of the federal, state and local employment taxes
required to be withheld by the Corporation in connection with the vesting and
issuance of the shares of Common Stock which vest under of the Award, any
phantom dividend equivalents distributed with respect to those shares and any
other amounts distributable in replacement or substitution of such shares.

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SCHEDULE I
PERFORMANCE GOALS AND PERFORMANCE PERIODS FOR THE THREE TRANCHES OF PERFORMANCE
SHARES
ESTABLISHMENT OF SEPARATE TRANCHES
The number of Performance Shares subject to the Award has, in accordance with
Paragraph 1 of this Agreement, been divided into three (3) separate Tranches:
Tranche One, Tranche Two and Tranche Three. Each such separate Tranche shall
cover one-third of the number of Performance Shares subject to this Award and
shall have its own separate Performance Period and Service Period.
PERFORMANCE PERIOD FOR TRANCHE ONE
The measurement period for the Performance Goal for the Performance Shares
allocated to Tranche One shall be the one-year period coincident with the
Corporation's 2013 calendar fiscal year (the “Tranche One Performance Period”).
SERVICE PERIOD FOR TRANCHE ONE
The applicable Service Period to which the Performance Goal for Tranche One
relates shall be the three (3)-year period beginning January 1, 2013 and ending
December 31, 2015.
PERFORMANCE GOAL FOR PERFORMANCE VESTING FOR TRANCHE ONE
Performance Goal for Tranche One: The performance-vesting requirement for the
Performance Shares allocated to Tranche One shall be tied to the Corporation's
recognition of net product revenue for the Tranche One Performance Period in a
dollar amount ranging from $9.6 Billion at twenty percent (20%) threshold level
attainment to $10 Billion at target level attainment and to $10.2 Billion at
maximum level attainment, with the net product revenue goal at any other point
within such range to be in the dollar amount determined on a straight-line
interpolated basis pursuant to the 2013 Fiscal Year Revenue Goal/Revenue Payout
Slope set forth below. For purposes of determining whether such Revenue
Performance Goal is attained, the actual level of net product revenue recognized
by the Corporation for the Tranche One Performance Period shall be the net
product revenue of the Corporation and its consolidated subsidiaries that is
reported on a consolidated basis in the Corporation's audited consolidated
financial statements for the calendar fiscal year coincident with the Tranche
One Performance Period, adjusted, however, to factor out the effect of any
changes in applicable accounting principles that occur after the start of such
period.
Performance-Qualified Shares: Within sixty-five (65) days after the completion
of the Tranche One Performance Period, the Administrator shall determine and
certify the actual dollar amount of net product revenue recognized by the
Corporation on a consolidated basis for the Tranche One Performance Period. The
actual number of Performance-Qualified Shares that results from such
certification (the “Tranche One Performance-Qualified Shares”) may range from 0%
to 200% of the number of Performance Shares allocated to Tranche One in
accordance with Paragraph 1 of this Agreement, with the actual percentage to be
determined on the basis of the dollar amount of net product revenue that the
Administrator certifies has in fact been recognized for the Tranche One
Performance Period, as measured and reported on a consolidated basis with the
Corporation's subsidiaries in accordance with the Corporation's audited
consolidated financial statements for the Corporation's calendar fiscal year
coincident with the Tranche One Performance Period; provided, however, that the
maximum number of the shares of Common Stock that may qualify as Tranche One
Performance-Qualified Shares may not exceed 200% of the number of Performance
Shares allocated to Tranche One in accordance with Paragraph 1 of this
Agreement.

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Payout Slope for Determining Number of Performance-Qualified Shares Based on
Attained Level of Tranche One Performance Goal: The number of shares of Common
Stock that may qualify as Tranche One Performance-Qualified Shares on the basis
of the certified dollar amount of net product revenue recognized by the
Corporation on a consolidated basis for the Tranche One Performance Period shall
be calculated by multiplying the number of Performance Shares allocated to
Tranche One in accordance with Paragraph 1 of this Agreement by the applicable
percentage determined in accordance with the following revenue goal/payout slope
for the Tranche One Performance Goal (with appropriate straight-line
interpolation for any attained level within two otherwise designated levels in
such slope):
PERFORMANCE PERIOD FOR TRANCHE TWO
The measurement period for the Performance Goal for the Performance Shares
allocated to Tranche Two shall be the one-year period coincident with the
Corporation's 2014 calendar fiscal year (the “Tranche Two Performance Period”).
SERVICE PERIOD FOR TRANCHE TWO
The applicable Service Period to which the Revenue Performance Goal for Tranche
Two relates shall be the two (2)-year period beginning January 1, 2014 and
ending December 31, 2015.
PERFORMANCE GOAL FOR PERFORMANCE VESTING FOR TRANCHE TWO
Performance Goal for Tranche Two: The performance-vesting requirement for the
Performance Shares allocated to Tranche Two shall be tied to the Corporation's
recognition of net product revenue for the Tranche Two Performance Period in the
dollar amounts (at threshold, target and maximum levels, with appropriate
straight-line interpolation between any two such designated levels) to be set by
the Administrator no later than ninety (90) days after the start of that
performance period, with the actual level of Revenue Performance Goal attainment
for the Tranche Two Performance Period to be as measured and reported on a
consolidated basis with the Corporation's subsidiaries in the Corporation's
audited consolidated financial statements for the calendar fiscal year
coincident with the Tranche Two Performance Period, adjusted, however, to factor
out the effect of any changes in applicable accounting principles that occur
after the start of such performance period. Promptly following the
Administrator's establishment of the applicable Revenue Performance Goal for the
Tranche Two Performance Period, Participant shall be provided with written
notice of the applicable revenue goal levels and payout slope approved by the
Administrator with respect to that goal.
Performance-Qualified Shares: Within sixty-five (65) days after the completion
of the Tranche Two Performance Period, the Administrator shall determine and
certify the actual dollar amount of net product revenue recognized by the
Corporation on a consolidated basis for the Tranche Two Performance Period. The
actual number of Performance-Qualified Shares that results from such
certification (the “Tranche Two Performance-Qualified Shares”) may range from 0%
to 200% of the number of Performance Shares allocated to Tranche Two in
accordance with Paragraph 1 of this Agreement, with the actual percentage to be
determined on the basis of the dollar amount of net product revenue that the
Administrator certifies has in fact been recognized for the Tranche Two
Performance Period, as measured and reported on a consolidated basis with the
Corporation's subsidiaries in accordance with the Corporation's audited
consolidated financial statements for the Corporation's calendar fiscal year
coincident with the Tranche Two Performance Period; provided, however, that the
maximum number of the shares of Common Stock that may qualify as Tranche Two

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Performance-Qualified Shares may not exceed 200% of the number of Performance
Shares allocated to Tranche Two in accordance with Paragraph 1 of this
Agreement.
Payout Slope for Determining Number of Performance-Qualified Shares Based on
Attained Level of Tranche Two Performance Goal: The number of shares of Common
Stock that may qualify as Tranche Two Performance-Qualified Shares on the basis
of the certified dollar amount of net product revenue recognized by the
Corporation on a consolidated basis for the Tranche Two Performance Period shall
be calculated by multiplying the number of Performance Shares allocated to
Tranche Two in accordance with Paragraph 1 of this Agreement by the applicable
percentage determined in accordance with the payout slope (with appropriate
straight-line interpolation for any attained level within two otherwise
designated levels in such slope) approved by the Administrator at the same time
it establishes the applicable Revenue Performance Goal for the Tranche Two
Performance Period. 
PERFORMANCE PERIOD FOR TRANCHE THREE
The measurement period for the Performance Goal for the Performance Shares
allocated to Tranche Three shall be the one-year period coincident with the
Corporation's 2015 calendar fiscal year (the “Tranche Three Performance
Period”).
SERVICE PERIOD FOR TRANCHE THREE
The applicable Service Period to which the Revenue Performance Goal for Tranche
Three relates shall be the one (1)-year period beginning January 1, 2015 and
ending December 31, 2015.
PERFORMANCE GOAL FOR PERFORMANCE VESTING FOR TRANCHE THREE
Performance Goal for Tranche Three: The performance-vesting requirement for the
Performance Shares allocated to Tranche Three shall be tied to the Corporation's
recognition of net product revenue for the Tranche Three Performance Period in
the dollar amounts (at threshold, target and maximum levels, with appropriate
straight-line interpolation between any two such designated levels) to be set by
the Administrator no later than ninety (90) days after the start of that
performance period, with the actual level of Revenue Performance Goal attainment
for the Tranche Three Performance Period to be as measured and reported on a
consolidated basis with the Corporation's subsidiaries in the Corporation's
audited consolidated financial statements for the calendar fiscal year
coincident with the Tranche Three Performance Period, adjusted, however, to
factor out the effect of any changes in applicable accounting principles that
occur after the start of such performance period. Promptly following the
Administrator's establishment of the applicable Revenue Performance Goal for the
Tranche Three Performance Period, Participant shall be provided with written
notice of that goal and the applicable payout slope approved by the
Administrator with respect to that goal.
Performance-Qualified Shares: Within sixty-five (65) days after the completion
of the Tranche Three Performance Period, the Administrator shall determine and
certify the actual dollar amount of net product revenue recognized by the
Corporation on a consolidated basis for the Tranche Three Performance Period.
The actual number of Performance-Qualified Shares that results from such
certification (the “Tranche Three Performance-Qualified Shares”) may range from
0% to 200% of the number of Performance Shares allocated to Tranche Three in
accordance with Paragraph 1 of this Agreement, with the actual percentage to be
determined on the basis of the dollar amount of net product revenue that the
Administrator certifies has in fact been recognized for the Tranche Three
Performance Period, as measured on a consolidated basis with the Corporation's
subsidiaries in accordance with the Corporation's audited consolidated financial
statements for the Corporation's calendar fiscal year coincident with the
Tranche Three Performance Period; provided, however, that the maximum number of
the shares of Common Stock that may qualify as Tranche Three

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Performance-Qualified Shares may not exceed 200% of the number of Performance
Shares allocated to Tranche Three in accordance with Paragraph 1 of this
Agreement.
Payout Slope for Determining Number of Performance-Qualified Shares Based on
Attained Level of Tranche Three Performance Goal: The number of shares of Common
Stock that may qualify as Tranche Three Performance-Qualified Shares on the
basis of the certified dollar amount of net product revenue recognized by the
Corporation on a consolidated basis for the Tranche Three Performance Period
shall be calculated by multiplying the number of Performance Shares allocated to
Tranche Three in accordance with Paragraph 1 of this Agreement by the applicable
percentage determined in accordance with the payout slope (with appropriate
straight-line interpolation for any attained level within two otherwise
designated levels in such slope) approved by the Administrator at the same time
it establishes the applicable Revenue Performance Goal for the Tranche Three
Performance Period.
CONTINUOUS SERVICE VESTING REQUIREMENT FOR PERFORMANCE-QUALIFIED SHARES
The number of shares of Common Stock in which Participant may actually vest on
the basis of the number of Performance-Qualified Shares certified by the
Administrator for each separate Tranche of Performance Shares in accordance with
the foregoing provisions shall be tied to his or her completion of the following
Continuous Service vesting requirement applicable to each such Tranche:
-    If Participant remains in Continuous Service through the last day of the
applicable Service Period specified above for that Tranche, then Participant
shall vest in one hundred percent (100%) of the Performance-Qualified Shares
certified by the Administrator for that Tranche.
-    If Participant's Continuous Service terminates prior to the last day of the
applicable Service Period specified above for that Tranche by reason of
Retirement, death or Permanent Disability, then Participant shall, following the
completion of the applicable Service Period for that Tranche, vest in that
number of shares of Common Stock (if any) determined by multiplying the maximum
number of Performance-Qualified Shares in which Participant could vest under
that particular Tranche, based on the actual level at which the Revenue
Performance Goal for that Tranche is attained and certified, by a fraction the
numerator of which is the number of months of Continuous Service actually
completed by Participant in the applicable Service Period for that Tranche
(rounded to the closest whole month) and the denominator of which is the number
of months (rounded to the closest whole number) constituting the Service Period
specified above for that Tranche.
-    If Participant's Continuous Service ceases for any other reason (including,
without limitation, any deemed cessation of Continuous Service under Paragraph 8
of this Agreement) prior to the completion of the applicable Service Period
specified above for that Tranche, then Participant shall not vest in any of the
Performance-Qualified Shares covered by that Tranche, and all of Participant's
right, title and interest to the shares of Common Stock underlying that Tranche
shall immediately terminate; provided, however, that should a Change in Control
occur prior to the completion of the applicable Service Period for that Tranche,
then the provisions of Paragraph 4 of the Agreement shall govern the vesting of
the Performance Shares (if any) allocated to that Tranche.
-    Notwithstanding anything to the contrary in the foregoing provisions of
this Continuous Service section, should Participant's Continuous Service cease
for any

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reason prior to the start of the Service Period specified above for any
particular Tranche of Performance Shares, then Participant shall not vest in any
of the Performance Shares allocated to that Tranche, and all of Participant's
right, title and interest to the shares of Common Stock underlying that Tranche
shall immediately terminate.

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