Exhibit 99.1

VERTEX PHARMACEUTICALS INCORPORATED
2026 STOCK AND OPTION PLAN

1.DEFINED TERMS
Exhibit A, which is incorporated by reference, defines certain terms used in the Plan and includes certain operational rules related to those terms.
2.PURPOSE
The Plan has been established to advance the interests of the Company by providing for the grant to Participants of Stock and Stock-based Awards.
3.ADMINISTRATION
The Plan will be administered by the Administrator. The Administrator has discretionary authority, subject only to the express provisions of the Plan, to administer and interpret the Plan and any Awards; to determine eligibility for and grant Awards; to determine the exercise price, base value from which appreciation is measured, or purchase price, if any, applicable to any Award, to determine, modify, accelerate or waive the terms and conditions of any Award; to determine the form of settlement of Awards (whether in cash, shares of Stock, other Awards or other property); to prescribe forms, rules and procedures relating to the Plan and Awards; and to otherwise do all things necessary or desirable to carry out the purposes of the Plan or any Award. Determinations of the Administrator made with respect to the Plan or any Award are conclusive and bind all persons.
4.SHARE POOL; LIMITS ON AWARDS UNDER THE PLAN
(a)Number of Shares. Subject to adjustment as provided in Section 7(b) below, the maximum number of shares of Stock that may be delivered in satisfaction of Awards under the Plan is 6,400,000 shares, plus (i) the number of shares of Stock that as of the Effective Date are subject to awards under the Company’s Amended and Restated 2013 Stock and Option Plan (the “2013 Plan”) and that on or after the Effective Date expire or are terminated, surrendered or canceled without the delivery of any shares of Stock, or are forfeited or reacquired by the Company, in accordance with the terms of such plan, including the fungible share ratio set forth therein, and (ii) the number of shares of Stock that as of the Effective Date remain available for issuance under the 2013 Plan (which, in the case of (i) and (ii), shall not exceed 13,232,240 shares, prior to the application of the fungible share ratio set forth in the 2013 Plan) (such aggregate number of shares of Stock, the “Share Pool”). Up to the total number of shares of Stock from the Share Pool may be delivered in satisfaction of ISOs, but nothing in this Section 4(a) will be construed as requiring that any, or any fixed number of, ISOs be granted under the Plan. For purposes of determining the share limits under this Section 4(a), (i) each share of Stock subject to a Stock Option or SAR will count as one share and each share of Stock subject to any other Award will count as 1.66 shares, and (ii) the number of shares of Stock delivered in satisfaction of Awards will be determined (A) by reducing the Share Pool by the number of



shares of Stock withheld by the Company in payment of the exercise price or purchase price of an Award or an award granted under the 2013 Plan or in satisfaction of tax withholding requirements with respect to an Award or an award granted under the 2013 Plan, (B) by reducing the Share Pool by the full number of shares covered by a SAR any portion of which is settled in Stock (and not only the number of shares of Stock delivered in settlement), and (C) by increasing the Share Pool by any shares of Stock underlying any portion of an Award or an award granted under the 2013 Plan that is settled in cash or that expires, becomes unexercisable, terminates or is forfeited to or repurchased by the Company without the issuance (or retention, in the case of Restricted Stock or Unrestricted Stock) of Stock. For the avoidance of doubt, the Share Pool will not be increased by any shares of Stock delivered under the Plan that are subsequently repurchased using proceeds directly attributable to Stock Option exercises. The limits set forth in this Section 4(a) will be construed to comply with the applicable requirements of Section 422.
(b)Substitute Awards. The Administrator may grant Substitute Awards under the Plan. To the extent consistent with the requirements of Section 422 and the regulations thereunder and other applicable legal requirements (including applicable stock exchange requirements), shares of Stock delivered in respect of Substitute Awards will be in addition to and will not reduce the Share Pool. Notwithstanding the foregoing or anything in Section 4(a) to the contrary, if any Substitute Award is settled in cash or expires, becomes unexercisable, terminates or is forfeited to or repurchased by the Company without the delivery (or retention, in the case of Restricted Stock or Unrestricted Stock) of Stock, the shares of Stock previously subject to such Award will not increase the Share Pool or otherwise be available for future grant under the Plan. The Administrator will determine the extent to which the terms and conditions of the Plan apply to Substitute Awards, if at all; provided, however, that Substitute Awards will not be subject to the limits described in Section 4(d) below.
(c)Type of Shares. Stock delivered by the Company under the Plan may be authorized but unissued Stock, treasury Stock or previously issued Stock acquired by the Company. Fractional shares of Stock may be delivered under the Plan subject to such rules and procedures as determined by the Administrator from time to time.
(d)Director Limits. Notwithstanding anything to the contrary under the Plan, the aggregate value of all compensation granted or paid to any Director with respect to any calendar year, including Awards granted under the Plan and cash fees or other compensation paid by the Company to such Director outside of the Plan for his or her services as a Director during such calendar year, may not exceed $1,250,000 in the aggregate, calculating the value of any Awards based on the grant date fair value in accordance with the Accounting Rules and assuming a maximum payout, to the extent applicable. For the avoidance of doubt, the limitation in this Section 4(d) will not apply to any compensation granted or paid to a Director for his or her services to the Company or an affiliate other than as a Director, including, without limitation, as a consultant, advisor or other service provider to the Company or an affiliate.
5.ELIGIBILITY AND PARTICIPATION
The Administrator will select Participants from among Employees and Directors of, and consultants and advisors to, the Company and its affiliates; provided, however, that, subject to such express exceptions, if any, as the Administrator may establish, eligibility shall be further
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limited to those persons as to whom the use of a Form S-8 registration statement is permissible. Eligibility for ISOs is limited to individuals who are employees of the Company or of a “parent corporation” or “subsidiary corporation” of the Company as those terms are defined in Section 424 of the Code. Eligibility for Stock Options, other than ISOs, and SARs is limited to individuals described in the first sentence of this Section 5 who are providing direct services on the date of grant of the Award to the Company or to a subsidiary of the Company that would be described in the first sentence of Section 1.409A-1(b)(5)(iii)(E) of the Treasury Regulations.
6.RULES APPLICABLE TO AWARDS
(a)All Awards.
(1)Award Provisions. The Administrator will determine the terms and conditions of all Awards, subject to the limitations provided herein. No term of an Award shall provide for automatic “reload” grants of additional Awards upon the exercise of an Option or SAR. By accepting (or, under such rules as the Administrator may prescribe, being deemed to have accepted) an Award, the Participant agrees (or will be deemed to have agreed) to the terms and conditions of the Award and the Plan. Notwithstanding any provision of the Plan to the contrary, Substitute Awards may contain terms and conditions that are inconsistent with the terms and conditions specified herein, as determined by the Administrator.
(2)Term of Plan. No Awards may be made after May 13, 2036 but previously granted Awards may continue beyond that date in accordance with their terms.
(3)Transferability. Neither ISOs nor, except as the Administrator otherwise expressly provides in accordance with the third sentence of this Section 6(a)(3), other Awards may be transferred other than by will, by the laws of descent and distribution or pursuant to a validly issued domestic relations order. During a Participant’s lifetime, ISOs and, except as the Administrator otherwise expressly provides in accordance with the third sentence of this Section 6(a)(3), SARs and NSOs may be exercised only by the Participant. The Administrator may permit the gratuitous transfer (i.e., transfer not for value) of Awards other than ISOs, including for estate planning purposes, subject to applicable securities and other laws and such terms and conditions as the Administrator may determine; for avoidance of doubt, no Award may be transferred for consideration to a third party.
(4)Vesting; Exercisability. The Administrator will determine the time or times at which an Award vests or becomes exercisable and the terms and conditions on which a Stock Option or SAR remains exercisable. Without limiting the foregoing, the Administrator may at any time accelerate the vesting and/or exercisability of an Award (or any portion thereof), regardless of any adverse or potentially adverse tax or other consequences resulting from such acceleration, including in connection with a Covered Transaction or other transaction or event. Unless the Administrator expressly provides otherwise, however, the following rules will apply if a Participant’s Employment ceases:
(A)    Immediately upon the cessation of the Participant’s Employment, each unvested Stock Option and SAR (or portion thereof) that is then held by the Participant or by the Participant’s permitted transferees, if any, will cease to be
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exercisable and will terminate and each other unvested Award (or portion thereof) that is then held by the Participant or by the Participant’s permitted transferees, if any, will be forfeited.
(B)    Subject to (C) and (D) below, each Stock Option and SAR (or portion thereof) held by the Participant or the Participant’s permitted transferees, if any, immediately prior to the cessation of the Participant’s Employment, to the extent then vested and exercisable, will remain exercisable for the lesser of (i) a period of ninety (90) days following such cessation of Employment or (ii) the period ending on the latest date on which such Stock Option or SAR could have been exercised without regard to this Section 6(a)(4), and will thereupon immediately terminate.
(C)    Subject to (D) below, each Stock Option and SAR (or portion thereof) held by a Participant or the Participant’s permitted transferees, if any, immediately prior to the cessation of the Participant’s Employment due to the Participant’s death or by the Company due to the Participant’s Disability, to the extent then vested and exercisable, will remain exercisable for the lesser of (i) the one-year period ending on the first anniversary of such cessation of Employment or (ii) the period ending on the latest date on which such Stock Option or SAR could have been exercised without regard to this Section 6(a)(4), and will thereupon immediately terminate.
(D)    All Awards (whether or not vested or exercisable) held by a Participant or the Participant’s permitted transferees, if any, immediately prior to the cessation of the Participant’s Employment will immediately terminate upon (i) such cessation of Employment if the termination is for Cause or occurs in circumstances that in the determination of the Administrator would have constituted grounds for the Participant’s Employment to be terminated for Cause (in each case, without regard to the lapsing of any required notice or cure periods in connection therewith) or (ii) to the maximum extent permitted under applicable law, the Participant’s violation of any non-competition, non-solicitation, no-hire, non-disparagement, confidentiality, invention assignment, or other restrictive covenant in favor of the Company or any of its affiliates by which the Participant is bound.
(5)    Recovery of Compensation; Other Policies. The Administrator may provide in any case that any outstanding Award (whether or not vested or exercisable), the proceeds from the exercise or disposition of any Award or Stock acquired under any Award, and any other amounts received in respect of any Award or Stock acquired under any Award will be subject to forfeiture and disgorgement to the Company, with interest and other related earnings, if the Participant to whom the Award was granted is not in compliance with any provision of the Plan or any applicable Award or violates any non-competition, non-solicitation, no-hire, non-disparagement, confidentiality, invention assignment or other restrictive covenant by which the Participant is bound. Each Award will be subject to any policy of the Company or any of its affiliates that relates to trading on non-public information and permitted transactions with respect to shares of Stock, including limitations on hedging and pledging. In addition, each Award will be subject to recoupment to the extent a Participant is or becomes subject to the Company’s Policy for Recoupment of Incentive Compensation, effective October 2, 2023, the Company’s
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March 2013 Recoupment Policy, or any other policy of the Company or any of its affiliates that provides for forfeiture, disgorgement, or clawback with respect to incentive compensation that includes Awards under the Plan (the “Clawback Policies”). Each Participant, by accepting or being deemed to have accepted an Award under the Plan, agrees (or will be deemed to have agreed) to the terms of this Section 6(a)(5), and to the Clawback Policies, if applicable, and further agrees (or will be deemed to have further agreed) to cooperate fully with the Administrator, and to cause any and all permitted transferees of the Participant to cooperate fully with the Administrator, to effectuate any forfeiture, recoupment or disgorgement described in this Section 6(a)(5). Neither the Administrator nor the Company nor any other person, other than the Participant and the Participant’s permitted transferees, if any, will be responsible for any adverse tax or other consequences to a Participant or the Participant’s permitted transferees, if any, that may arise in connection with this Section 6(a)(5).
(6)    Taxes. The grant of an Award and the issuance, delivery, vesting and retention of Stock, cash or other property under an Award are conditioned upon the full satisfaction by the Participant of all tax and other withholding requirements with respect to the Award under applicable laws. The Administrator will prescribe such rules for the withholding of taxes and other amounts with respect to any Award as it deems necessary. Without limiting the foregoing, the Company or any affiliate of the Company will have the authority and the right to deduct or withhold (by any means set forth herein or in an Award agreement), or require a Participant to remit to the Company or an affiliate of the Company, an amount sufficient to satisfy all U.S. and non-U.S. federal, state and local income tax, social insurance, payroll tax, fringe benefits tax, payment on account or other tax-related items related to participation in the Plan and any Award hereunder and legally applicable to the Participant and required by law to be withheld (including, any amount deemed by the Company, in its discretion, to be an appropriate charge to the Participant even if legally applicable to the Company or any affiliate of the Company). Subject to applicable laws, the Administrator, in its sole discretion, may hold back shares of Stock from an Award or permit a Participant to tender previously-owned shares of Stock in satisfaction of tax or other withholding requirements (but not in excess of the maximum withholding amount consistent with the Award being subject to equity accounting treatment under the Accounting Rules). Any amounts withheld pursuant to this Section 6(a)(6) will be treated as though such amounts had been paid directly to the applicable Participant. In addition, the Company may, to the extent permitted by law, deduct any such tax and other withholding amounts from any payment of any kind otherwise due to a Participant from the Company or any of its affiliates.
(7)    Dividend Equivalents. The Administrator may provide for the payment of amounts (on terms and subject to such restrictions and conditions established by the Administrator, including providing for the reinvestment of such amounts in the form of additional Awards) in lieu of cash dividends or other cash distributions with respect to Stock subject to an Award, whether or not the holder of such Award is otherwise entitled to share in the actual dividend or distribution in respect of such Award; provided, however, that (a) dividends or dividend equivalents relating to an Award that, at the dividend payment date, remain subject to a risk of forfeiture (whether service-based or performance-based) shall be subject to the same risk of forfeiture that applies to the underlying Award and (b) no dividends or dividend equivalents
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shall be payable with respect to Stock Options or SARs. Any entitlement to dividend equivalents or similar entitlements will be established and administered either consistent with an exemption from, or in compliance with, the applicable requirements of Section 409A.
(8)    Rights Limited. Nothing in the Plan or any Award will be construed as giving any person the right to be granted an Award or to continued employment or service with the Company or any of its affiliates, or any rights as a shareholder except as to shares of Stock actually delivered under the Plan. The loss of existing or potential profit in any Award will not constitute an element of damages in the event of a termination of a Participant’s Employment for any reason, even if the termination is in violation of an obligation of the Company or any of its affiliates to the Participant.
(9)    Coordination with Other Plans. Shares of Stock and/or Awards under the Plan may be issued or granted in tandem with, or in satisfaction of or substitution for, other Awards under the Plan or awards made under other compensatory plans or programs of the Company or any of its affiliates. For example, but without limiting the generality of the foregoing, awards under other compensatory plans or programs of the Company or any of its affiliates may be settled in Stock (including, without limitation, Unrestricted Stock) under the Plan if the Administrator so determines, in which case the shares delivered will be treated as awarded under the Plan (and will reduce the Share Pool).
(10)    Reserved.
(11)    Section 409A.
(A)    Without limiting the generality of Section 11(a) below, each Award will contain such terms as the Administrator determines and will be construed and administered, such that the Award either qualifies for an exemption from the requirements of Section 409A or satisfies such requirements.
(B)    Notwithstanding anything to the contrary in the Plan or any Award agreement, the Administrator may unilaterally amend, modify or terminate the Plan or any outstanding Award, including but not limited to changing the form of the Award, if the Administrator determines that such amendment, modification or termination is necessary or desirable to avoid the imposition of any additional tax, interest or penalty under Section 409A.
(C)    If a Participant is determined on the date of the Participant’s termination of Employment to be a “specified employee” within the meaning of that term under Section 409A(a)(2)(B) of the Code, then, with regard to any payment that is considered nonqualified deferred compensation under Section 409A, to the extent applicable, payable on account of a “separation from service”, such payment will be made or provided on the date that is the earlier of (i) the first business day following the expiration of the six-month period measured from the date of such “separation from service” and (ii) the date of the Participant’s death (the “Delay Period”). Upon the expiration of the Delay Period, all payments delayed pursuant to this Section 6(a)(11)(C) (whether they would have otherwise been payable in a single lump sum or in installments
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in the absence of such delay) will be paid, without interest, on the first business day following the expiration of the Delay Period in a lump sum and any remaining payments due under the Award will be paid in accordance with the normal payment dates specified for them in the applicable Award agreement.
(D)    For purposes of Section 409A, each payment made under the Plan or any Award will be treated as a separate payment.
(E)    With regard to any payment considered to be nonqualified deferred compensation under Section 409A, to the extent applicable, that is payable upon a change in control of the Company or other similar event, to the extent required to avoid the imposition of any additional tax, interest or penalty under Section 409A, no amount will be payable unless such change in control constitutes a “change in control event” within the meaning of Section 1.409A-3(i)(5) of the Treasury Regulations.
(b)Stock Options and SARs.
(1)    Time and Manner of Exercise. Unless the Administrator expressly provides otherwise, no Stock Option or SAR will be deemed to have been exercised until the Administrator receives a notice of exercise in a form acceptable to the Administrator that is signed by the appropriate person and accompanied by any payment required under the Award. The Administrator may limit or restrict the exercisability of any Stock Option or SAR in its discretion, including in connection with any Covered Transaction. Any attempt to exercise a Stock Option or SAR by any person other than the Participant will not be given effect unless the Administrator has received such evidence as it may require that the person exercising the Award has the right to do so. If on the date the term of an NSO expires or on the last date such NSO is exercisable in accordance with Section 6(a)(4), the fair market value of a share of Stock exceeds the exercise price per share of the NSO, then the NSO shall automatically be exercised with respect to all then vested Shares underlying such NSO and, upon such automatic exercise, such NSO shall immediately terminate. In such case, payment of the exercise price for the shares of Stock as to which such NSO is being exercised, and all tax withholding requirements, shall be satisfied by the withholding of unrestricted shares of Stock otherwise deliverable upon such exercise as set forth in Section 6(b)(3) below. As a result of such net exercise, the Participant shall receive (i) the number of shares of Stock underlying the portion of the NSO so being exercised, less (ii) such whole number of shares of Stock (rounded up to the nearest share) that is equal to (A) the aggregate exercise price for the portion of the NSO that is so being exercised plus the amount of all applicable tax withholdings associated with such exercise divided by (B) the fair market value of a share of Stock on the date of exercise.
(2)    Exercise Price. The exercise price (or the base value from which appreciation is to be measured) per share of each Award requiring exercise must be no less than 100% (in the case of an ISO granted to a 10-percent shareholder within the meaning of Section 422(b)(6) of the Code, 110%) of the Fair Market Value of a share of Stock, determined as of the date of grant of the Award, or such higher amount as the Administrator may determine in connection with the grant.
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(3)    Payment of Exercise Price. Where the exercise of an Award (or portion thereof) is to be accompanied by payment, payment of the exercise price must be made by cash or check acceptable to the Administrator or, if so permitted by the Administrator and if legally permissible, (i) through the delivery of previously acquired unrestricted shares of Stock, or the withholding of unrestricted shares of Stock otherwise deliverable upon exercise, in either case, that have a fair market value equal to the exercise price; (ii) through a broker-assisted cashless exercise program acceptable to the Administrator; (iii) by other means acceptable to the Administrator; or (iv) by any combination of the foregoing permissible forms of payment. The delivery of previously acquired shares in payment of the exercise price under clause (i) above may be accomplished either by actual delivery or by constructive delivery through attestation of ownership, subject to such rules as the Administrator may prescribe.
(4)    Maximum Term. The maximum term of Stock Options and SARs must not exceed 10 years from the date of grant (or five years from the date of grant in the case of an ISO granted to a 10-percent shareholder described in Section 6(b)(2) above).
(5)    No Repricing. Except in connection with a corporate transaction involving the Company (which term includes, without limitation, any stock dividend, stock split, extraordinary cash dividend, recapitalization, reorganization, merger, consolidation, split-up, spin-off, combination or exchange of shares) or as otherwise contemplated by Section 7 below, the Company may not, without obtaining shareholder approval, (i) amend the terms of outstanding Stock Options or SARs to reduce the exercise price or base value of such Stock Options or SARs, (ii) cancel outstanding Stock Options or SARs in exchange for Stock Options or SARs that have an exercise price or base value that is less than the exercise price or base value of the original Stock Options or SARs, or (iii) cancel outstanding Stock Options or SARs that have an exercise price or base value greater than the fair market value of a share of Stock on the date of such cancellation in exchange for cash or other consideration.
7.EFFECT OF CERTAIN TRANSACTIONS
(a)Covered Transactions. Except as otherwise expressly provided in an Award agreement or other agreement or by the Administrator, the following provisions will apply in the event of a Covered Transaction:
(1)    Assumption or Substitution. If the Covered Transaction is one in which there is an acquiring or surviving entity, the Administrator may provide for (i) the assumption or continuation of some or all outstanding Awards or any portion thereof or (ii) the grant of new awards in substitution therefor by the acquiror or survivor or an affiliate of the acquiror or survivor.
(2)    Cash-Out of Awards. Subject to Section 7(a)(5) below, the Administrator may provide for payment (a “cash-out”), with respect to some or all Awards or any portion thereof (including only the vested portion thereof, with the unvested portion terminating as provided in Section 7(a)(4) below), equal in the case of each applicable Award or portion thereof to the excess, if any, of (i) the fair market value of one share of Stock multiplied by the number of shares of Stock subject to the Award or such portion, minus (ii) the aggregate exercise or purchase price, if any, of such Award or such portion thereof (or, in the case of a
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SAR, the aggregate base value above which appreciation is measured), in each case, on such payment and other terms and subject to such conditions (which need not be the same as the terms and conditions applicable to holders of Stock generally) as the Administrator determines, including that any amounts paid in respect of such Award in connection with the Covered Transaction be placed in escrow or otherwise made subject to such restrictions as the Administrator deems appropriate. For the avoidance of doubt, if the per share exercise or purchase price (or base value) of an Award or portion thereof is equal to or greater than the fair market value of one share of Stock, as determined in connection with the Covered Transaction, such Award or portion may be cancelled with no payment due hereunder or otherwise in respect thereof.
(3)    Acceleration of Certain Awards. Subject to Section 7(a)(5) below, the Administrator may provide that any Award requiring exercise will become exercisable, in full or in part, and/or that the delivery of any shares of Stock remaining deliverable under any outstanding Award of Stock Units (including Restricted Stock Units and Performance Awards to the extent consisting of Stock Units) will be accelerated, in full or in part, in each case on a basis that gives the holder of the Award a reasonable opportunity, as determined by the Administrator, following the exercise of the Award or the delivery of the shares, as the case may be, to participate as a shareholder in the Covered Transaction.
(4)    Termination of Awards upon Consummation of Covered Transaction. Except as the Administrator may otherwise determine, each Award will automatically terminate (and in the case of outstanding shares of Restricted Stock, will automatically be forfeited) immediately upon the consummation of the Covered Transaction; provided, however, that unless the Administrator provides for the assumption, continuation or substitution of Awards pursuant to Section 7(a)(1) above, all outstanding Awards shall become immediately and fully exercisable, any applicable vesting conditions shall be deemed satisfied, with any performance vesting conditions deemed to be satisfied in full, and any forfeiture restrictions shall be deemed to have lapsed, in each case as of immediately prior to the consummation of the Covered Transaction.
(5)    Additional Limitations. Any share of Stock and any cash or other property or other award delivered pursuant to Section 7(a)(1), Section 7(a)(2) or Section 7(a)(3) above with respect to an Award may, in the discretion of the Administrator, contain such restrictions, if any, as the Administrator deems appropriate, including to reflect any performance or other vesting conditions to which the Award was subject and that did not lapse (and were not satisfied) in connection with the Covered Transaction. For purposes of the immediately preceding sentence, a cash-out under Section 7(a)(2) above or an acceleration under Section 7(a)(3) above will not, in and of itself, be treated as the lapsing (or satisfaction) of a performance or other vesting condition. In the case of Restricted Stock that does not vest and is not forfeited in connection with the Covered Transaction, the Administrator may require that any amounts delivered, exchanged or otherwise paid in respect of such Stock in connection with the Covered Transaction be placed in escrow or otherwise made subject to such restrictions as the Administrator deems appropriate to carry out the intent of the Plan.
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(6)    Uniform Treatment. For the avoidance of doubt, the Administrator need not treat Participants or Awards (or portions thereof) in a uniform manner, and may treat different Participants and/or Awards differently, in connection with a Covered Transaction.
(b)Changes in and Distributions with Respect to Stock.
(1)    Basic Adjustment Provisions. In the event of a stock dividend, extraordinary cash dividend, stock split or combination of shares (including a reverse stock split), recapitalization, reorganization, merger, consolidation, combination, exchange of shares, liquidation, spin-off, split-up or other similar change in the Company’s capital structure that constitutes an equity restructuring within the meaning of the Accounting Rules, the Administrator shall make appropriate adjustments to the Share Pool, and shall make appropriate adjustments to the number and kind of shares of stock or securities underlying Awards then outstanding or subsequently granted, any exercise or purchase prices (or base values) relating to Awards and any other provision of Awards affected by such change.
(2)    Certain Other Adjustments. The Administrator may also make adjustments of the type described in Section 7(b)(1) above to take into account distributions to shareholders other than those provided for in Sections 7(a) and 7(b)(1) above, or any other event, if the Administrator determines that adjustments are appropriate to avoid distortion in the operation of the Plan or any Award, having due regard for the qualification of ISOs under Section 422 and the requirements of Section 409A, to the extent applicable.
(3)    Continuing Application of Plan Terms. References in the Plan to shares of Stock will be construed to include any stock or securities resulting from an adjustment pursuant to this Section 7.
8.LEGAL CONDITIONS ON DELIVERY OF STOCK
The Company will not be obligated to deliver any shares of Stock pursuant to the Plan or to remove any restriction from shares of Stock previously delivered under the Plan until: (i) the Company is satisfied that all legal matters in connection with the issuance and delivery of such shares have been addressed and resolved; (ii) if the outstanding Stock is at the time of delivery listed on any stock exchange or national market system, the shares to be delivered have been listed or authorized to be listed on such exchange or system upon official notice of issuance; and (iii) all conditions of the Award have been satisfied or waived. The Company may require, as a condition to the exercise of an Award or the delivery of shares of Stock under an Award, such representations or agreements as counsel for the Company may consider appropriate to avoid violation of the Securities Act of 1933, as amended, or any applicable state or non-U.S. securities law. Any Stock delivered to Participants under the Plan will be evidenced in such manner as the Administrator determines appropriate, including book-entry registration or delivery of stock certificates. In the event that the Administrator determines that stock certificates will be issued in connection with Stock issued under the Plan, the Administrator may require that such certificates bear an appropriate legend reflecting any restriction on transfer applicable to such Stock, and the Company may hold the certificates pending the lapse of the applicable restrictions.
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9.    AMENDMENT AND TERMINATION
The Administrator may at any time or times amend the Plan or any outstanding Award for any purpose which may at the time be permitted by applicable law, and may at any time terminate the Plan as to any future grants of Awards; provided, however, that except as otherwise expressly provided in the Plan or the applicable Award, the Administrator may not, without the Participant’s consent, alter the terms of an Award so as to affect materially and adversely the Participant’s rights under the Award, unless the Administrator expressly reserved the right to do so in the Plan or at the time the applicable Award was granted. Any amendments to the Plan will be conditioned upon shareholder approval only to the extent, if any, such approval is required by applicable law (including the Code) or stock exchange requirements, as determined by the Administrator. For the avoidance of doubt, without limiting the Administrator’s rights hereunder, no adjustment to any Award pursuant to the terms of Section 7 or Section 12 will be treated as an amendment requiring a Participant’s consent.
10.    OTHER COMPENSATION ARRANGEMENTS
The existence of the Plan or the grant of any Award will not affect the right of the Company or any of its affiliates to grant any person bonuses or other compensation in addition to Awards under the Plan.
11.    MISCELLANEOUS
(a)    Waiver of Jury Trial. By accepting or being deemed to have accepted an Award under the Plan, each Participant waives (or will be deemed to have waived), to the maximum extent permitted under applicable law, any right to a trial by jury in any action, proceeding or counterclaim concerning any rights under the Plan or any Award, or under any amendment, waiver, consent, instrument, document or other agreement delivered or which in the future may be delivered in connection therewith, and agrees (or will be deemed to have agreed) that any such action, proceedings or counterclaim will be tried before a court and not before a jury. By accepting (or being deemed to have accepted) an Award under the Plan, each Participant certifies that no officer, representative, or attorney of the Company or any of its affiliates has represented, expressly or otherwise, that the Company would not, in the event of any action, proceeding or counterclaim, seek to enforce the foregoing waivers. Notwithstanding anything to the contrary in the Plan, nothing herein is to be construed as limiting the ability of the Company and a Participant to agree to submit any disputes arising under the terms of the Plan or any Award made hereunder to binding arbitration or as limiting the ability of the Company to require any individual to agree to submit such disputes to binding arbitration as a condition of receiving an Award hereunder.
(b)    Limitation of Liability. Notwithstanding anything to the contrary in the Plan or any Award, none of the Company, nor any of its affiliates, nor the Administrator, nor any person acting on behalf of the Company, any of its affiliates, or the Administrator, will be liable to any Participant, to any permitted transferee, to the estate or beneficiary of any Participant or any permitted transferee, or to any other person by reason of any acceleration of income, any additional tax, or any penalty, interest or other liability asserted by reason of the failure of an
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Award to satisfy the requirements of Section 422 or Section 409A or by reason of Section 4999 of the Code, or otherwise asserted with respect to any Award.
(c)    Unfunded Plan. The Company’s obligations under the Plan are unfunded, and no Participant will have any right to specific assets of the Company in respect of any Award. Participants will be general unsecured creditors of the Company with respect to any amounts due or payable under the Plan.
12.    ESTABLISHMENT OF SUB-PLANS
The Administrator may at any time and from time to time (including before or after an Award is granted) establish, adopt, or revise any rules and regulations as it may deem necessary or advisable to administer the Plan for Participants based outside of the U.S. and/or subject to the laws of countries other than the U.S., including by establishing one or more sub-plans, supplements or appendices under the Plan or any Award agreement for the purpose of complying or facilitating compliance with non-U.S. laws or taking advantage of tax favorable treatment or for any other legal or administrative reason determined by the Administrator. Any such sub-plan, supplement or appendix may contain, in each case, (i) such limitations on the Administrator’s discretion under the Plan and (ii) such additional or different terms and conditions, as the Administrator deems necessary or desirable and will be deemed to be part of the Plan but will apply only to Participants within the group to which the sub-plan, supplement or appendix applies (as determined by the Administrator); provided, however, that no sub-plan, supplement or appendix, rule or regulation established pursuant to this provision shall increase the Share Pool.
13.    GOVERNING LAW
(a)    Certain Requirements of Corporate Law. Awards and shares of Stock will be granted, issued and administered consistent with the requirements of applicable Massachusetts law relating to the issuance of stock and the consideration to be received therefor, and with the applicable requirements of the stock exchanges or other trading systems on which the Stock is listed or entered for trading, in each case as determined by the Administrator.
(b)    Other Matters. Except as otherwise provided by the express terms of an Award agreement or under a sub-plan described in Section 12 above, the domestic substantive laws of the Commonwealth of Massachusetts govern the provisions of the Plan and of Awards under the Plan and all claims or disputes arising out of or based upon the Plan or any Award under the Plan or relating to the subject matter hereof or thereof without giving effect to any choice or conflict of laws provision or rule that would cause the application of the domestic substantive laws of any other jurisdiction.
(c)    Jurisdiction. Subject to Section 11(a) and except as may be expressly set forth in an Award agreement, by accepting (or being deemed to have accepted) an Award, each Participant agrees or will be deemed to have agreed to (i) submit irrevocably and unconditionally to the jurisdiction of the federal and state courts located within the geographic boundaries of the United States District Court for the District of Massachusetts for the purpose of any suit, action or other proceeding arising out of or based upon the Plan or any Award; (ii) not commence any
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suit, action or other proceeding arising out of or based upon the Plan or any Award, except in the federal and state courts located within the geographic boundaries of the United States District Court for the District of Massachusetts; and (iii) waive, and not assert, by way of motion as a defense or otherwise, in any such suit, action or proceeding, any claim that the Participant is not subject personally to the jurisdiction of the above-named courts, that the Participant’s property is exempt or immune from attachment or execution, that the suit, action or proceeding is brought in an inconvenient forum, that the venue of the suit, action or proceeding is improper or that the Plan or any Award or the subject matter thereof may not be enforced in or by such court.

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EXHIBIT A
Definition of Terms
The following terms, when used in the Plan, have the meanings and are subject to the provisions set forth below:
“Accounting Rules”: Financial Accounting Standards Board Accounting Standards Codification Topic 718, or any successor provision.
“Administrator”: The Compensation Committee, except that the Board may at any time act in the capacity of the Administrator (including with respect to such matters that are not delegated to the Compensation Committee by the Board (whether pursuant to committee charter or otherwise), if applicable). The Compensation Committee (or the Board, with respect to such matters over which it retains authority under the Plan or otherwise) may delegate (i) to one or more of its members (or one or more other members of the Board) such of its duties, powers and responsibilities as it may determine; (ii) to one or more officers of the Company the power to grant Awards to the extent permitted by applicable law; and (iii) to such Employees or other persons as it determines such ministerial tasks as it deems appropriate. For purposes of the Plan, the term “Administrator” will include the Board, the Compensation Committee, and the person or persons delegated authority under the Plan to the extent of such delegation, as applicable.
“Award”: Any or a combination of the following:
(i) Stock Options.
(ii) SARs.
(iii) Restricted Stock.
(iv) Unrestricted Stock.
(v) Stock Units, including Restricted Stock Units.
(vi) Performance Awards.
(vii) Awards (other than Awards described in (i) through (vi) above) that are convertible into or otherwise based on Stock.
“Board”: The board of directors of the Company.
“Cause”: shall mean (i) the Participant’s dishonesty in the performance of his or her duties to the Company or its affiliates or fraud, or (ii) the willful misconduct by the Participant or willful failure by the Participant to perform his or her responsibilities to the Company or its affiliates (including, without limitation, any material breach by the Participant of any provision of any Company policy or any employment, consulting, advisory, nondisclosure, non-competition or other similar agreement between the Participant and the Company or any of its affiliates), in each case as determined in good faith by the Company, which determination shall be conclusive; provided, however, that if there is a conflict between this definition of Cause and either (1) the definition of “Cause” contained in any employment or other individual service agreement between the Company and the Participant or (2) the definition of “Cause” contained
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in any change of control agreement between the Company and the Participant, then such other definition shall be controlling for the purposes of the Plan.
“Change of Control” shall mean that (a) any “person” or “group” as such terms are used in Sections 13(d) and 14(d)(2) of the Securities Exchange Act of 1934, as amended (the “Act”), becomes a beneficial owner, as such term is used in Rule 13d-3 promulgated under the Act, of securities of the Company representing more than 50% of the combined voting power of the outstanding securities of the Company having the right to vote in the election of directors; or (b) all or substantially all the business or assets of the Company are sold or disposed of, or the Company or a subsidiary of the Company combines with another company pursuant to a merger, consolidation, or other similar transaction, other than (i) a transaction solely for the purpose of reincorporating the Company or one of its subsidiaries in a different jurisdiction or recapitalizing or reclassifying the Company’s stock; or (ii) a merger or consolidation in which the shareholders of the Company immediately prior to such merger or consolidation continue to own at least a majority of the outstanding voting securities of the Company or the surviving entity immediately after such merger or consolidation.
“Code”: The U.S. Internal Revenue Code of 1986, as from time to time amended and in effect, or any successor statute as from time to time in effect, including any applicable regulations and guidance thereunder.
“Compensation Committee”: The Management Development and Compensation Committee of the Board.
“Company”: Vertex Pharmaceuticals Incorporated, a Massachusetts corporation.
“Covered Transaction”: Any of (i) a consolidation, merger or similar transaction or series of related transactions, including a sale or other disposition of stock, in which the Company is not the surviving entity or which results in the acquisition of all or substantially all of the Company’s then outstanding common stock by a single person or entity or by a group of persons and/or entities acting in concert, (ii) a sale or transfer of all or substantially all the Company’s assets, (iii) a dissolution or liquidation of the Company or (iv) a Change of Control. Where a Covered Transaction involves a tender offer that is reasonably expected to be followed by a merger described in clause (i) (as determined by the Administrator), the Covered Transaction will be deemed to have occurred upon consummation of the tender offer.
“Director”: A member of the Board who is not an Employee.
“Disability”: A disability entitling a Participant to benefits under the Company’s long-term disability program, as in effect from time to time. With regard to any payment considered to be nonqualified deferred compensation under Section 409A, to the extent applicable, that is payable upon a cessation of a Participant’s Employment due to Disability, to avoid the imposition of an additional tax, interest or penalty under Section 409A, no amount will be payable unless such Disability constitutes a disability or becoming disabled within the meaning of Section 1.409A-3(i)(4) of the Treasury Regulations.
“Effective Date”: The date the Plan is approved by shareholders of the Company.
“Employee”: Any person who is employed by the Company or any of its affiliates.
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“Employment”: A Participant’s employment or other service relationship with the Company or any of its affiliates. Employment will be deemed to continue, unless the Administrator otherwise determines, so long as the Participant is employed by, or otherwise is providing services in a capacity described in Section 5 of the Plan to, the Company or any of its affiliates. If a Participant’s employment or other service relationship is with any affiliate of the Company and that entity ceases to be an affiliate of the Company, the Participant’s Employment will be deemed to have terminated when the entity ceases to be an affiliate of the Company unless the Participant transfers Employment to the Company or one of its remaining affiliates. For purposes of the Plan, an approved leave of absence due to a temporary disability or that constitutes a standard paid leave under Company policies as in effect from time to time shall not be deemed to be a termination of Employment, except as the Administrator may otherwise expressly provide or except as otherwise provided by law.
Notwithstanding the foregoing, in construing the provisions of any Award relating to the payment of “nonqualified deferred compensation” (subject to Section 409A) upon a termination or cessation of Employment, references to termination or cessation of employment, separation from service, retirement or similar or correlative terms will be construed to require a “separation from service” (as that term is defined in Section 1.409A-1(h) of the Treasury Regulations, after giving effect to the presumptions contained therein) from the Company and from all other corporations and trades or businesses, if any, that would be treated as a single “service recipient” with the Company under Section 1.409A-1(h)(3) of the Treasury Regulations. The Company may, but need not, elect in writing, subject to the applicable limitations under Section 409A, any of the special elective rules prescribed in Section 1.409A-1(h) of the Treasury Regulations for purposes of determining whether a “separation from service” has occurred. Any such written election will be deemed a part of the Plan.
“Fair Market Value”: As of a particular date, (i) the mean between the highest and lowest quoted selling prices for a share of Stock reported on the Nasdaq Market System (or any other national securities exchange on which the Stock is then listed) for that date or, if there were no sales on such date, on the next preceding date within a reasonable period (as determined in the sole discretion of the Administrator) on which there were sales or (ii) in the event that the Stock is not traded on a national securities exchange, the fair market value of a share of Stock determined by the Administrator consistent with the rules of Section 422 and Section 409A to the extent applicable.
“ISO”: A Stock Option intended to be an “incentive stock option” within the meaning of Section 422. Each Stock Option granted pursuant to the Plan will be treated as providing by its terms that it is to be an NSO unless, as of the date of grant, it is expressly designated as an ISO in the applicable Award agreement.
“NSO”: A Stock Option that is not intended to be an “incentive stock option” within the meaning of Section 422.
“Participant”: A person who is granted an Award under the Plan.
“Performance Award”: An Award subject to performance vesting conditions, which may include Performance Criteria.
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“Performance Criteria”: Specified criteria, other than the mere continuation of Employment or the mere passage of time, the satisfaction of which is a condition for the grant, exercisability, vesting or full enjoyment of an Award. A Performance Criterion and any targets with respect thereto need not be based upon an increase, a positive or improved result or avoidance of loss and may be applied, without limitation, to a Participant individually, to a group of individual Participants, or to a business unit or division of the Company or to the Company as a whole. A Performance Criterion may also be based on individual performance and/or subjective performance criteria (or any combination of any of the criteria described in this definition). The Administrator may provide that one or more of the Performance Criteria applicable to such Award will be adjusted in a manner to reflect events (for example, but without limitation, acquisitions or dispositions) occurring during the performance period that affect the applicable Performance Criterion or Criteria.
“Plan”: The Vertex Pharmaceuticals Incorporated 2026 Stock and Option Plan, as from time to time amended and in effect.
“Restricted Stock”: Stock subject to restrictions requiring that it be forfeited, redelivered or offered for sale to the Company if specified performance or other vesting conditions are not satisfied.
“Restricted Stock Unit”: A Stock Unit that is, or as to which the delivery of Stock or of cash in lieu of Stock is, subject to the satisfaction of specified performance or other vesting conditions.
“SAR”: A right entitling the holder upon exercise to receive an amount (payable in cash or in shares of Stock of equivalent value) equal to the excess of the Fair Market Value of the shares of Stock subject to the right over the base value from which appreciation under the SAR is to be measured.
“Section 409A”: Section 409A of the Code and the regulations thereunder.
“Section 422”: Section 422 of the Code and the regulations thereunder.
“Stock”: Common stock of the Company, par value $.01 per share.
“Stock Option”: An option entitling the holder to acquire shares of Stock upon payment of the exercise price.
“Stock Unit”: An unfunded and unsecured promise, denominated in shares of Stock, to deliver Stock or cash measured by the value of Stock in the future.
“Substitute Award”: An award granted under the Plan in substitution for one or more equity awards of an acquired company that are converted, replaced or adjusted in connection with the acquisition.
“Unrestricted Stock”: Stock not subject to any restrictions under the terms of the Award.



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