Exhibit 10.1

VERTEX PHARMACEUTICALS INCORPORATED
2006 STOCK and OPTION PLAN

1.                  DEFINITIONS

Unless otherwise specified or unless the context otherwise requires, the following terms, as used in this Vertex Pharmaceuticals Incorporated 2006 Stock and Option Plan, have the following meanings:

Administrator means the Board of Directors and/or a committee of the Board of Directors to which the Board of Directors has delegated power to act on its behalf in administering this Plan in whole or in part.

Affiliate means a corporation that, for purposes of Section 424 of the Code, is a parent or subsidiary of the Company, direct or indirect.

Board of Directors means the Board of Directors of the Company.

Code means the United States Internal Revenue Code of 1986, as amended.

Common Stock means shares of the Company’s common stock, $.01 par value.

Company means Vertex Pharmaceuticals Incorporated, a Massachusetts corporation.

Employee means an employee of the Company or of an Affiliate (including, without limitation, an employee who is also serving as an officer or director of the Company or of an Affiliate), designated by the Administrator to be eligible to be granted one or more Stock Rights under the Plan.

Exchange Act means the Securities Exchange Act of 1934, as amended.

Fair Market Value of a Share of Common Stock on a particular date shall be the mean between the highest and lowest quoted selling prices on such date (the “valuation date”) on the securities market where the Common Stock is traded, or if there were no sales on the valuation date, on the next preceding date within a reasonable period (as determined in the sole discretion of the Administrator) on which there were sales. If there were no sales in such a market within a reasonable period, the fair market value shall be as determined in good faith by the Administrator in its sole discretion. The Fair Market Value as determined in this paragraph shall be rounded down to the next lower whole cent if the foregoing calculation results in fractional cents.

ISO means an option intended to qualify as an incentive stock option under Code Section 422.

Non-Employee Director means a member of the Board of Directors who is not an employee of the Company or any Affiliate.

Non-Qualified Option means an option that is not intended to qualify as an ISO.

Option means an ISO or Non-Qualified Option granted under the Plan.

Participant means an Employee, Non-Employee Director, consultant or advisor of the Company or an Affiliate to whom one or more Stock Rights are granted under the Plan. As used herein, “Participant” shall include “Participant’s Survivors” and a Participant’s permitted transferees where the context requires.

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Participant’s Survivors means a deceased Participant’s legal representatives and/or any person or persons who acquires the Participant’s rights to a Stock Right by will or by the laws of descent and distribution.

Plan means this Vertex Pharmaceuticals Incorporated 2006 Stock and Option Plan, as amended from time to time.

Shares means shares of the Common Stock as to which Stock Rights have been or may be granted under the Plan or any shares of capital stock into which the Shares are changed or for which they are exchanged within the provisions of Section 3 of the Plan. The Shares subject to Stock Rights granted under the Plan may be authorized and unissued shares or shares held by the Company in its treasury, or both.

Stock Agreement means an agreement between the Company and a Participant delivered pursuant to the Plan with respect to a Stock Right, in such form as the Administrator shall approve.

Stock-Based Award means a grant by the Company under the Plan of an equity award or equity-based award that is not an Option or Stock Grant.

Stock Grant means a grant by the Company of Shares under the Plan.

Stock Right means a right to Shares or the value of Shares of the Company granted pursuant to the Plan as an ISO, a Non-Qualified Option, a Stock Grant or a Stock-Based Award.

2.                  PURPOSES OF THE PLAN

The Plan is intended to encourage ownership of Shares by Employees, Non-Employee Directors and certain consultants and advisors to the Company in order to attract such persons, to induce them to work for the benefit of the Company or of an Affiliate and to provide additional incentive for them to promote the success of the Company or of an Affiliate. The Plan provides for the granting of Stock Rights to Employees, Non-Employee Directors, consultants and advisors of the Company.

3.                  SHARES SUBJECT TO THE PLAN

The number of Shares subject to this Plan as to which Stock Rights may be granted from time to time shall be 7,350,000 or the equivalent of such number of Shares after the Administrator, in its sole discretion, has interpreted the effect of any stock split, stock dividend, combination, recapitalization or similar transaction in accordance with Section 17 of this Plan. No Stock Rights shall be granted under this Plan prior to the date on which the stockholders of the Company approve this Plan. The number of Shares subject to this Plan shall be reduced, share for share, by the number of shares underlying Stock Rights, if any, that are granted under the Company’s 1996 Stock and Option Plan after March 22, 2006.

If an Option granted hereunder ceases to be outstanding, in whole or in part (other than by exercise), or if the Company shall reacquire (at no more than its original issuance price) any Shares issued pursuant to a Stock Grant, or if any Stock Right expires or is forfeited, cancelled or otherwise terminated or results in any Shares not being issued, the unissued Shares that were subject to such Stock Right shall again be available for issuance from time to time pursuant to this Plan.

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4.                  ADMINISTRATION OF THE PLAN

The Administrator shall administer the Plan. Subject to the provisions of the Plan, the Administrator is authorized to:

a.                  Interpret the provisions of the Plan and of any Stock Right or Stock Agreement and to make all rules and determinations that it deems necessary or advisable for the administration of the Plan;

b.                 Determine which Employees, Non-Employee Directors, consultants and advisors of the Company and its Affiliates shall be granted Stock Rights;

c.                  Determine the number of Shares and exercise price for which a Stock Right shall be granted;

d.                 Specify the terms and conditions upon which a Stock Right or Stock Rights may be granted;

e.                  In its discretion, accelerate:

(i)                 the date of exercise of any installment of any Option; provided that the Administrator shall not, without the consent of the Option holder accelerate the exercise date of any installment of any Option granted to any Employee as an ISO (and not previously converted into a Non-Qualified Option pursuant to Section 20) if such acceleration would violate the annual vesting limitation contained in Section 422(d) of the Code, as described in Section 6.2.3; or

(ii)              the date or dates of vesting of Shares, or lapsing of Company repurchase rights with respect to any Shares, under any Stock Rights; and

f.                    In its discretion, extend the exercise date for any Option;

provided, however, that all such interpretations, rules, determinations, terms and conditions shall be made and prescribed in the context of preserving the tax status under Code Section 422 of those Options which are designated as ISOs (unless the holder of any such Option otherwise agrees). Subject to the foregoing, the interpretation and construction by the Administrator of any provisions of the Plan or of any Stock Right granted under it shall be final, unless otherwise determined by the Board of Directors, if the Administrator is other than the Board of Directors.

The Administrator may employ attorneys, consultants, accountants or other persons, and the Administrator, the Company and its officers and directors shall be entitled to rely upon the advice, opinions or valuations of such persons. All actions taken and all interpretations and determinations made by the Administrator in good faith shall be final and binding upon the Company, all Participants, and all other interested persons. No member or agent of the Administrator shall be personally liable for any action, determination, or interpretation made in good faith with respect to this Plan or grants hereunder. Each member of the Administrator shall be indemnified and held harmless by the Company against any cost or expense (including counsel fees) reasonably incurred by him or her or any liability (including any sum paid in settlement of a claim with the approval of the Company) arising out of any act or omission to act in connection with this Plan unless arising out of such member’s own fraud or bad faith. Such indemnification shall be in addition to any rights of indemnification the members of the Administrator may have as directors or otherwise under the by-laws of the Company, or any agreement, vote of stockholders or disinterested directors, or otherwise.

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5.                  ELIGIBILITY FOR PARTICIPATION

The Administrator shall, in its sole discretion, name the Participants in the Plan, provided, however, that each Participant must be a Employee, Non-Employee Director, consultant or advisor of the Company or of an Affiliate at the time a Stock Right is granted. Notwithstanding the foregoing, the Administrator may authorize the grant of a Stock Right to a person not then an Employee, Non-Employee Director, consultant or advisor of the Company or of an Affiliate; provided , however , that the actual grant of such Stock Right shall be conditioned upon such person becoming eligible to become a Participant at or prior to the time of execution of the Stock Agreement evidencing such Stock Right. ISOs may be granted only to Employees. The granting of any Stock Right to any individual shall neither entitle that individual to, nor disqualify him or her from, participation in other grants of Stock Rights.

6.                  TERMS AND CONDITIONS OF OPTIONS

6.1    General.    Each Option shall be set forth in writing in a Stock Agreement, duly executed by the Company and, to the extent required by law or requested by the Company, by the Participant. The Administrator may provide that Options be granted subject to such terms and conditions, consistent with the terms and conditions specifically required under this Plan, as the Administrator may deem appropriate including, without limitation, subsequent approval by the stockholders of the Company of this Plan or any amendments thereto. Each Stock Agreement shall state the option price (per share) of the Shares covered by each Option, the number of Shares to which it pertains, the date or dates on which it first is exercisable and the date after which it may no longer be exercised (subject to Sections 11, 12 and 13 of this Plan). Option rights may accrue or become exercisable in installments over a period of time, or upon the achievement of certain conditions or the attainment of stated goals or events.

6.2    ISOs.    Each Option intended to be an ISO shall be issued only to Employees. In addition to the minimum standards set forth in Section 6.1, ISOs shall be subject to the following terms and conditions, with such additional restrictions or changes as the Administrator determines are appropriate but not in conflict with Code Section 422 and relevant regulations and rulings of the Internal Revenue Service:

6.2.1    ISO Option Price.    The Option price per share of the Shares covered by an ISO shall not be less than one hundred percent (100%) of the Fair Market Value per share of the Common Stock on the date of grant of the ISO; provided, however, that the Option price per share of the Shares covered by each ISO granted to a Participant who owns, directly or by reason of the applicable attribution rules in Code Section 424(d), more than ten percent (10%) of the total combined voting power of all classes of stock of the Company or an Affiliate shall not be less than one hundred ten percent (110%) of the Fair Market Value on the date of grant.

6.2.2    Term of ISO.    Each ISO shall expire not more than ten (10) years from the date of grant; provided, however, that an ISO granted to a Participant who owns, directly or by reason of the applicable attribution rules in Code Section 424(d), more than ten percent (10%) of the total combined voting power of all classes of stock of the Company or an Affiliate shall expire not more than five (5) years from the date of grant.

6.2.3    Annual Limit on Incentive Stock Options.    To the extent required for “incentive stock option” treatment under Section 422 of the Code, the aggregate Fair Market Value

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(determined as of the time of grant) of the Shares with respect to which ISOs granted under this Plan and any other plan of the Company or its Affiliate become exercisable for the first time by a Participant during any calendar year shall not exceed the aggregate threshold for ISOs established by the Code ($100,000 as of March 22, 2006). To the extent that any Option exceeds this limit, it shall constitute a Non-Qualified Option.

6.3    Non-Employee Directors’ Options.    Each Non-Employee Director, upon first being elected or appointed to the Board of Directors, shall be granted a Non-Qualified Option to purchase that number of Shares as shall be established for such Option grants from time to time by the Board of Directors. Each such Option shall (i) have an exercise price equal to the Fair Market Value (per share) on the date of grant of the Option, (ii) have a term of ten (10) years, and (ii) shall become cumulatively exercisable in sixteen (16) equal quarterly installments, upon completion of each full quarter of service on the Board of Directors after the date of grant. In addition, on June 1 of each year, each Non-Employee Director shall be granted a Non-Qualified Option to purchase that number of Shares as shall be established for such Option grants from time to time by the Board of Directors. Each such Option shall (i) have an exercise price equal to the Fair Market Value (per share) on the date of grant of such Option, (ii) have a term of ten (10) years, and (iii) be exercisable in full immediately on the date of grant. Any director entitled to receive an Option grant under this Section may elect to decline the Option. If a Non-Employee Director ceases to be any of an Employee, Non-Employee Director, consultant or advisor of the Company, Options granted under this Section 6.3 shall remain exercisable to the extent such Options are exercisable on the date of such termination of service, for their full term, and the provisions of Sections 11 and 13 below shall not apply to any such Options.

6.4    Limitation on Number of Options Granted.    Notwithstanding anything in this Plan to the contrary, no Participant shall be granted an aggregate of Options and/or Stock-Based Awards under this Plan in any calendar year for more than an aggregate of 600,000 Shares (subject to adjustment pursuant to Section 17 to the extent consistent with Section 162(m) of the Code).

7.                  TERMS AND CONDITIONS OF STOCK GRANTS

Each Stock Grant shall be set forth in a Stock Agreement, duly executed by the Company and, to the extent required by law or requested by the Company, by the Participant. The Stock Agreement shall be in the form approved by the Administrator, with such changes and modifications to such form as the Administrator, in its discretion, shall approve with respect to any particular Participant or Participants. The Stock Agreement shall contain terms and conditions that the Administrator determines to be appropriate and in the best interest of the Company; provided, however, that the purchase price per share of the Shares covered by each Stock Grant shall not be less than the par value per Share. Each Stock Agreement shall state the number of Shares to which the Stock Grant pertains and the terms of any right of the Company to reacquire the Shares subject to the Stock Grant, including the time and events upon which such rights shall accrue and the purchase price therefor, and any restrictions on the transferability of such Shares.

8.                  TERMS AND CONDITIONS OF OTHER STOCK-BASED AWARDS

The Administrator shall have the right to grant other Stock-Based Awards having such terms and conditions as the Administrator may determine, including, without limitation, the grant of Shares based upon certain conditions, the grant of securities convertible into Shares and the grant

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of stock appreciation rights, phantom stock awards or stock units. The principal terms of each Stock-Based Award shall be set forth in a Stock Agreement, duly executed by the Company and, to the extent required by law or requested by the Company, by the Participant. The Stock Agreement shall be in a form approved by the Administrator and shall contain terms and conditions that the Administrator determines to be appropriate.

9.                  EXERCISE OF OPTIONS AND ISSUANCE OF SHARES

An Option (or any part or installment thereof) shall be exercised by giving written notice to the Company or its designee, together with provision for payment of the full purchase price in accordance with this Section for the Shares as to which the Option is being exercised, and upon compliance with any other condition(s) set forth in the Stock Agreement. Such notice shall be signed by the person exercising the Option, shall state the number of Shares with respect to which the Option is being exercised and shall contain any representation required by the Plan or the Stock Agreement.

Payment of the purchase price for the Shares as to which such Option is being exercised shall be made (a) in United States dollars in cash or by check acceptable to the Administrator, or (b) at the discretion of the Administrator, (i) through delivery of shares of Common Stock not subject to any restriction under any plan and having a Fair Market Value equal as of the date of exercise to the cash exercise price of the Option, (ii) in accordance with a cashless exercise program established with a securities brokerage firm, and approved by the Company, (iii) by any other means (excluding, however, delivery of a promissory note of the Participant) that the Administrator determines to be consistent with the purpose of this Plan and applicable law, or (iv) by any combination of the foregoing. Notwithstanding the foregoing, the Administrator shall accept only such payment on exercise of an ISO as is permitted by Section 422 of the Code.

The Company shall then as soon as is reasonably practicable deliver the Shares as to which such Option was exercised to the Participant (or to the Participant’s Survivors, as the case may be). It is expressly understood that the Company may delay the delivery of the Shares in order to comply with any law or regulation that requires the Company to take any action with respect to the Shares prior to their issuance. The Shares shall, upon delivery, be fully paid, non-assessable Shares.

10.           ASSIGNABILITY AND TRANSFERABILITY OF STOCK RIGHTS

By its terms, a Stock Right granted to a Participant shall not be transferable by the Participant other than by will or by the laws of descent and distribution or pursuant to a qualified domestic relations order as defined by the Code or Title I of the Employee Retirement Income Security Act or the rules thereunder or as approved by the Administrator in its discretion and set forth in the applicable Stock Agreement, provided, however, that the Administrator shall not approve any transfer of a Stock Right for consideration. Except as provided in the preceding sentence or as otherwise permitted under a Stock Agreement, a Stock Right shall be exercisable, during the Participant’s lifetime only by such Participant (or by his or her legal representative) and shall not be assigned, pledged or hypothecated in any way (whether by operation of law or otherwise) and shall not be subject to execution, attachment or similar process. Any attempted transfer, assignment, pledge, hypothecation or other disposition of any Stock Right or of any rights granted thereunder contrary to the provisions of this Plan, or the levy of any attachment or similar process upon a Stock Right, shall be null and void.

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11.           EFFECT ON STOCK RIGHTS OF TERMINATION OF SERVICE

11.1  Except as otherwise provided in the applicable Stock Agreement or as otherwise provided in Sections 12 or 13, if a Participant ceases to be an Employee, Non-Employee Director, consultant or advisor with the Company and its Affiliates (for any reason other than termination for “cause,” or death) (a “Termination of Service”) before the Participant has exercised all Stock Rights, the Participant may exercise any Stock Right granted to him or her to the extent that the Stock Right is exercisable on the date of such Termination of Service. Any such Stock Right must be exercised within three months after the date of the Participant’s Termination of Service, unless otherwise provided in the applicable Stock Agreement, but in no event after the expiration of the term of the Stock Right.

11.2  The provisions of this Section, and not the provisions of Section 14, shall apply to a Participant who subsequently dies after the Termination of Service; provided, however, that in the case of a Participant’s death within three (3) months after the Termination of Service, the Participant’s Survivors may exercise the Stock Right within one (1) year after the date of the Participant’s death, but in no event after the date of expiration of the term of the Stock Right.

11.3  Notwithstanding anything herein to the contrary, if subsequent to a Participant’s Termination of Service, but prior to the exercise of a Stock Right, the Administrator determines that, either prior or subsequent to the Participant’s Termination of Service, the Participant engaged in conduct which would constitute “cause” (as defined in Section 12), then such Participant shall forthwith cease to have any right to exercise any Stock Right. Stock Rights that consist of Shares issued under Stock Grants for which any restrictions on transfer or Company repurchase right shall have lapsed, shall be deemed for all purposes to have been “exercised.”

11.4  Absence from work with the Company or an Affiliate because of temporary disability or a leave of absence for any purpose, shall not, during the period of any such absence in accordance with Company policies, be deemed, by virtue of such absence alone, a Termination of Service, except as the Administrator may otherwise expressly provide.

11.5  Except as required by law or as set forth in a Participant’s Stock Agreement, Stock Rights granted under the Plan shall not be affected by any change of a Participant’s status within or among the Company and any Affiliates, so long as the Participant continues to be an employee, director, consultant or advisor of the Company or any Affiliate.

12.           EFFECT ON STOCK RIGHTS OF TERMINATION OF SERVICE FOR “CAUSE”

Except as otherwise provided in a Participant’s Stock Agreement or as otherwise agreed in writing by the Administrator, if a Participant’s service with the Company or an Affiliate is terminated for “cause,” all outstanding and unexercised (vested or unvested) Stock Rights will immediately be forfeited as of the time the Participant is notified that his or her service is terminated for “cause.” Stock Rights that consist of Shares issued under Stock Grants for which any restrictions on transfer or Company repurchase right shall have lapsed, shall be deemed for all purposes to have been “exercised.” For purposes of this Plan, “cause” shall include (and is not limited to) dishonesty with respect to the Company and its Affiliates, insubordination, substantial malfeasance or non-feasance of duty, unauthorized disclosure of confidential information, breach by the Participant of any provision of any employment, consulting, advisory, nondisclosure, non-competition or similar agreement between the Participant and the Company, and conduct substantially prejudicial to the business of the Company or any Affiliate. The determination of

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the Administrator as to the existence of cause will be conclusive on the Participant and the Company. “Cause” is not limited to events that have occurred prior to a Participant’s termination of service, nor is it necessary that the Administrator’s finding of “cause” occur prior to termination of service. If the Administrator determines, subsequent to a Participant’s termination of service but prior to the exercise of a Stock Right, that either prior or subsequent to the Participant’s termination of service the Participant engaged in conduct which would constitute “cause,” then the right to exercise any Stock Right shall be forfeited as set forth in this Section 12. Any definition in an agreement between a Participant and the Company or an Affiliate which contains a conflicting definition of “cause” for termination of service and which is in effect at the time of such termination of service shall supersede the definition in this Plan with respect to that Participant.

13.           EFFECT ON STOCK RIGHTS OF DEATH WHILE AN EMPLOYEE, DIRECTOR, CONSULTANT OR ADVISOR

Except as otherwise provided in a Participant’s Stock Agreement, in the event of death of a Participant while the Participant is an Employee, Non-Employee Director, consultant or advisor of the Company or of an Affiliate, any Stock Rights granted to such Participant may be exercised by the Participant’s Survivors to the extent exercisable but not exercised on the date of death. Any such Stock Right must be exercised within one (1) year after the date of death of the Participant but in no event after the date of expiration of the term of the Stock Right, notwithstanding that the decedent might have been able to exercise the Stock Right as to some or all of the Shares on a later date if he or she had not died and had continued to be an Employee, Non-Employee Director, consultant or advisor.

14.           RIGHTS AS A STOCKHOLDER

No Participant to whom a Stock Right (other than a Stock Grant) has been granted shall have rights as a stockholder with respect to any Shares covered by such Stock Right, except after due exercise thereof and/or tender of the full purchase price for the Shares being purchased pursuant to such exercise. The provisions of this Section 14 shall not be applicable to Shares issued pursuant to Stock Grants, provided that the Participant shall have tendered the purchase price therefore, notwithstanding the existence of stock transfer restrictions on or a Company repurchase right with respect to such Shares.

15.           EMPLOYMENT OR OTHER RELATIONSHIP

Nothing in this Plan or any Stock Agreement shall be deemed to prevent the Company or an Affiliate from terminating the employment, consultancy or director status of a Participant, or to prevent a Participant from terminating his or her own employment, consultancy or director status or to give any Participant a right to be retained in employment or other service by the Company or any Affiliate for any period of time.

16.           DISSOLUTION OR LIQUIDATION OF THE COMPANY

Upon the dissolution or liquidation of the Company (other than in connection with a transaction subject to the provisions of Section 17.2), all Stock Rights granted under this Plan which as of such date shall not have been exercised will terminate and become null and void; provided, however, that if the rights of a Participant or a Participant’s Survivors have not

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otherwise terminated and expired, the Participant or Participant’s Survivors will have the right immediately prior to such dissolution or liquidation to exercise any Stock Right to the extent that such Stock Right is exercisable as of the date immediately prior to such dissolution or liquidation. Upon the dissolution or liquidation of the Company, any outstanding Stock-Based Awards shall immediately terminate unless otherwise determined by the Administrator or specifically provided in the applicable Stock Agreement.

17.           ADJUSTMENTS

Upon the occurrence of any of the following events, a Participant’s rights with respect to any Stock Right granted to him or her hereunder that have not previously been exercised in full shall be adjusted as hereinafter provided, unless otherwise specifically provided in the Stock Agreement or in any employment agreement between a Participant and the Company or an Affiliate:

17.1    Stock Dividends and Stock Splits.    If the shares of Common Stock shall be subdivided or combined into a greater or smaller number of shares or if the Company shall issue any shares of Common Stock as a stock dividend on its outstanding Common Stock, the number of shares of Common Stock subject to or deliverable upon the exercise of a Stock Right shall be appropriately increased or decreased, and appropriate adjustments shall be made in the purchase price per Share to reflect such event. The number of Shares subject to Options to be granted to Non-Employee Directors pursuant to Section 6.3 and the number of Shares subject to the limitation in Section 6.4 shall also be proportionately adjusted upon the occurrence of such events.

17.2    Consolidations or Mergers.    In the event of a consolidation or merger in which the Company is not the surviving corporation or which results in the acquisition of substantially all the Company’s outstanding stock by a single person or entity or by a group of persons and/or entities acting in concert, or in the event of the sale or transfer of substantially all the Company’s assets (any of the foregoing, an “Acquisition”), all then outstanding Stock Rights (excluding any Shares subject to Stock Grants as to which all Company repurchase rights shall have lapsed) shall terminate unless assumed pursuant to clause (i) below; provided that either (i) the Administrator shall provide for the surviving or acquiring entity or an affiliate thereof to assume the outstanding Stock Rights or grant replacement stock rights in lieu thereof, any such replacement to be upon an equitable basis as determined by the Administrator, or (ii) if there is no such assumption or substitution, all outstanding Stock Rights shall become immediately and fully exercisable and all Company repurchase rights with respect to Stock Rights shall lapse, in each case immediately prior to the Acquisition, notwithstanding any restrictions or vesting conditions set forth therein.

17.3    Recapitalization or Reorganization.    In the event of a recapitalization or reorganization of the Company (other than a transaction described in Section 17.2 above) pursuant to which securities of the Company or of another corporation are issued with respect to the outstanding shares of Common Stock, a Participant upon exercising a Stock Right shall be entitled to receive for the purchase price paid upon such exercise the securities he or she would have received if he or she had exercised such Stock Right prior to such recapitalization or reorganization.

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17.4    Adjustments to Stock Grants and Stock-Based Awards.    Upon the happening of any of the events described in Sections 17.1, 17.2 or 17.3, any outstanding Stock-Based Award and the Shares subject to any Stock Grant, vested or unvested, shall be appropriately adjusted to reflect the events described in such Sections. The Administrator shall determine the specific adjustments to be made under this Section 17.4.

17.5    Modification of ISOs.    Notwithstanding the foregoing, any adjustments made pursuant to Section 17.1, 17.2 or 17.3 with respect to ISOs shall be made only after the Administrator determines whether such adjustments would constitute a “modification” of such ISOs (as that term is defined in Section 424(h) of the Code) or would cause any adverse tax consequences for the holders of such ISOs. If the Administrator determines that such adjustments made with respect to ISOs would constitute a modification of such ISOs, it may refrain from making such adjustments, unless the holder of an ISO specifically requests in writing that such adjustment be made and such writing indicates that the holder has full knowledge of the consequences of such “modification” on his or her income tax treatment with respect to the ISO.

18.           ISSUANCES OF SECURITIES

Except as expressly provided herein, no issuance (including for this purpose the delivery of shares held in treasury) by the Company of shares of stock of any class, or securities convertible into shares of stock of any class, shall affect, and no adjustment by reason thereof shall be made with respect to, the number or price of Shares subject to Stock Rights. Except as expressly provided herein, no adjustments shall be made for dividends paid in cash or in property (including without limitation, securities) of the Company.

19.           FRACTIONAL SHARES

No fractional share shall be issued under the Plan and the person exercising any Stock Right shall receive from the Company cash in lieu of any such fractional share equal to the Fair Market Value thereof.

20.           CONVERSION OF ISOs INTO NON-QUALIFIED OPTIONS: TERMINATION OF ISOs

Any Options granted under this Plan that do not meet the requirements of the Code for ISOs shall automatically be deemed to be Non-Qualified Options without further action on the part of the Administrator. The Administrator, at the written request of any Participant, may in its discretion take such actions as may be necessary to convert such Participant’s ISOs (or any portion thereof) that have not been exercised on the date of conversion into Non-Qualified Options at any time prior to the expiration of such ISOs, regardless of whether the Participant is an employee of the Company or an Affiliate at the time of such conversion. At the time of such conversion, the Administrator (with the consent of the Participant) may impose such conditions on the exercise of the resulting Non-Qualified Options as the Administrator in its discretion may determine, provided that such conditions shall not be inconsistent with this Plan. Nothing in the Plan shall be deemed to give any Participant the right to have such Participant’s ISOs converted into Non-Qualified Options, and no such conversion shall occur until and unless the Administrator takes appropriate action. The Administrator, with the consent of the Participant,

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may also terminate any portion of any ISO that has not been exercised at the time of such termination.

21.           WITHHOLDING

If any federal, state, or local income taxes, employment taxes, Federal Insurance Contributions Act (“FICA”) withholdings or other amounts are required by applicable law or governmental regulation to be withheld from the Participant’s salary, wages or other remuneration in connection with the exercise of a Stock Right, the lapsing of a Company repurchase right or a Disqualifying Disposition (as defined in Section 22), the Company may withhold from the Participant’ compensation, if any, or may require that the Participant advance in cash to the Company, or to any Affiliate of the Company which employs or employed the Participant, the amount of such withholdings unless a different withholding arrangement, including the use of shares of the Company’s Common Stock, is authorized by the Administrator (and permitted by law). For purposes hereof, the Fair Market Value of any shares withheld for purposes of payroll withholding shall be determined in the manner provided in Section 1 above, as of the most recent practicable date prior to the date of exercise. If the Fair Market Value of the shares withheld is less than the amount of payroll withholdings required, the Participant may be required to advance the difference in cash to the Company or the Affiliate employer. The Administrator in its discretion may condition the exercise of an Option for less than the then Fair Market Value on the Participant’s payment of such additional withholding. In no event shall shares be withheld from any award in satisfaction of tax withholding requirements in an amount that exceeds the statutory minimum amount of tax withholding required.

22.           NOTICE TO COMPANY OF DISQUALIFYING DISPOSITION

Each Employee who receives an ISO must agree to notify the Company in writing immediately after the Employee makes a “Disqualifying Disposition” of any Shares acquired pursuant to the exercise of an ISO. A Disqualifying Disposition is any disposition (as defined in Section 424(c) of the Code) of such Shares before the later of (a) two years from the date the Employee was granted the ISO, or (b) one year after the date the Employee acquired Shares by exercising the ISO. If the Employee has died before such Shares are sold, the notice provisions of this Section 22 shall not apply.

23.           EFFECTIVE DATE; TERMINATION OF THE PLAN

This Plan shall be effective on March 29, 2006, the date of its adoption by the Board of Directors, subject to approval by the shareholders of the Company. The Plan will terminate on March 28, 2016. The Plan also may be terminated at an earlier date by vote of the Board of Directors. Termination of this Plan will not affect any Stock Rights granted or Stock Agreements executed prior to the effective date of such termination.

24.           AMENDMENT OF THE PLAN; AMENDMENT OF STOCK RIGHTS

The Plan may be amended by the stockholders of the Company by affirmative vote of a majority of the votes cast at a meeting of the stockholders at which a quorum is present. The Plan also may be amended by the Board of Directors or the Administrator, including, without limitation, to the extent necessary to qualify any or all outstanding Stock Rights granted under the Plan or Stock Rights to be granted under the Plan for favorable federal income tax treatment

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(including deferral of taxation upon exercise) as may be afforded incentive stock options under Section 422 of the Code, and to the extent necessary to qualify the shares issuable upon exercise of any outstanding Stock Rights granted, or Stock Rights to be granted, under the Plan for listing on any national securities exchange or quotation in any national automated quotation system of securities dealers. Any amendment approved by the Administrator that the Administrator determines is of a scope that requires stockholder approval shall be subject to stockholder approval. No modification or amendment of the Plan shall adversely affect a Participant’s rights under a Stock Right previously granted to the Participant, without such Participant’s consent.

In its discretion, the Administrator may amend any term or condition of any outstanding Stock Right, provided: (i) such term or condition is not prohibited by the Plan; (ii) if the amendment is adverse to the Participant, such amendment shall be made only with the consent of the Participant or the Participant’s Survivors, as the case may be; and (iii) any such amendment of any ISO shall be made only after the Administrator determines whether such amendment would constitute a “modification” of any Stock Right which is an ISO (as that term is defined in Section 424(h) of the Code) or would cause any adverse tax consequences for the holder of such ISO (in which case, the Participant’s or Participant’s Survivors’ consent to such amendment shall be required). Notwithstanding the foregoing, the Administrator shall not have the authority to reduce the exercise price of any Option after the date of grant, except for adjustments permitted under Section 17 of this Plan.

25.           GOVERNING LAW

This Plan shall be construed and enforced in accordance with the law of The Commonwealth of Massachusetts.

 

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Exhibit 10.2

VERTEX PHARMACEUTICALS INCORPORATED
2006 STOCK AND OPTION PLAN

Form of Stock Option Grant

This Agreement sets forth the terms and conditions of an Option granted pursuant to the provisions of the 2006 Stock and Option Plan (the “ Plan ”) of Vertex Pharmaceuticals Incorporated (the “ Company ”) to the Participant whose name appears below, covering the number of Shares of Common Stock of the Company set forth below, pursuant to the provisions of the Plan and on the following express terms and conditions. Capitalized terms not otherwise defined herein shall have the same meanings as set forth in the Plan.

1.             Name and address of Participant to whom this Option is granted:

[name and address]

2.             Number of Shares of Common Stock subject to this Option:

[        ] Shares

3.             Purchase price of Shares subject to this Option:

[        ] per Share

4.             Date of grant of this Option:

[        ]

5.             Expiration date of this Option:

[        ], subject to earlier termination in the event of any Termination of Service of the Participant or otherwise in accordance with the provisions of the Plan. This Option may not be exercised later than three (3) months after the Participant’s termination of employment with the Company and its Affiliates except as provided in the Plan in the event of death of the Participant.

6.             Vesting.

6.1          Vesting Schedule. This Option shall vest and become exercisable, so long as the Participant continues to serve as an Employee, Non-Employee Director, consulant or advisor of the Company or an Affiliate, in sixteen (16) equal quarterly installments, with the first such installment vesting three (3) months after the date of grant and subsequent installments vesting every three months thereafter until fully vested, except as otherwise provided in paragraphs 6.2 and 6.3 below.

6.2          Absence. This Option shall not vest during any period of long-term disability or personal leave of absence of the Participant from the Company or an Affiliate (as determined under applicable Company policies). If the Participant resumes employment with the Company after a personal leave of absence or long-term disability in accordance with applicable Company policies, vesting shall resume upon the resumption of eligibility, and the Option will continue vesting at the rate provided in paragraph 6.1 above until the Option is fully exercisable.

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Notwithstanding the foregoing, in no event shall the term of the Option be extended beyond the date set forth in Section 5 above.

6.3          Death of the Participant. In the event of the death of the Participant while serving as an Employee, Non-Employee Director, consultant or advisor of the Company or an Affiliate, the vesting of those installments of this Option that would otherwise vest during the one-year period following the date of death shall be accelerated, and the Option shall be exercisable as to such installments, together with any previously vested but unexercised portion of the Option, effective as of the date of death for the period set forth in the Plan.

7.             [Option type]. This Option is [NOT] designated as an incentive stock option within the meaning of Section 422(b) of the Internal Revenue Code of 1986.

8.             Plan. The Participant hereby acknowledges receipt of a copy of the Plan as presently in effect. The text and all of the terms and provisions of the Plan are incorporated herein by reference, and this Agreement is subject to these terms and provisions in all respects.

9.             Exercise. The Participant may exercise this Option in the manner set forth in Section 9 of the Plan.

	VERTEX PHARMACEUTICALS INCORPORATED
	By:
	Name:
	Title:

 

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Exhibit 10.3

VERTEX PHARMACEUTICALS INCORPORATED
2006 STOCK AND OPTION PLAN

Form of Restricted Stock Award

This Agreement sets forth the terms and conditions of shares of a stock grant pursuant to the provisions of the 2006 Stock and Option Plan (the “ Plan ”) of Vertex Pharmaceuticals Incorporated (the “ Company ”) to the Participant whose name appears below, for the number of Shares of Common Stock of the Company set forth below, pursuant to the provisions of the Plan and on the following express terms and conditions. Capitalized terms not otherwise defined herein shall have the same meanings as set forth in the Plan.

1.             Name and address of Participant to whom the Shares are granted:

[name and address]

2.             Number of Shares in Stock Grant:

[        ] Shares

3.             Purchase price of Shares:

$0.01 per Share

4.             Date of grant of the Shares:

[        ]

5.             Vesting.

5.1          Vesting Schedule and Company’s Repurchase Right. Except as otherwise provided in section 5.2, the Shares shall vest in four (4) equal annual installments, with the first such installment vesting on the first anniversary of the date of grant of the Shares, and subsequent installments vesting annually on subsequent anniversaries thereafter until all of the granted Shares have vested. Upon any Termination of Service of the Participant, vesting of the Shares shall immediately cease, and the Company shall have a right to repurchase any unvested Shares from the Participant at a price per Share equal to the purchase price per Share set forth in section 3 above. The Company’s right to so repurchase the Shares shall be valid for a period of one year beginning on the date of any Termination of Service of the Participant, or, if the Company is prohibited by law from such repurchase at the time of Termination of Service, for thirty days after any such prohibition is terminated.

5.2          Death of the Participant. In the event of the death of the Participant while an employee of the Company or an Affiliate, the vesting of those installments of this Agreement that would otherwise vest during the one-year period following the date of death shall be accelerated.

5.3          Agreement with respect to Tax Payments and Withholding. The Participant acknowledges and agrees that any income or other taxes due from the Participant with respect to the Shares issued pursuant to this Agreement, including on account of the vesting of the Shares, shall be the Participant’s responsibility. By accepting this Stock Award, the Participant agrees and acknowledges that (i)  the Company promptly will withhold from the Participant’s pay the amount of taxes the

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Company is required to withhold upon any vesting of Shares pursuant to this Agreement, and (ii)  the Participant shall make immediate payment to the Company in the amount of any tax required to be withheld by the Company in excess of the Participant’s pay available for such withholding.

6.             Restrictions on Transfer. The Shares may not be sold, transferred, assigned, hypothecated, pledged, encumbered or otherwise disposed of, whether voluntarily or by operation of law, at any time before they become vested Shares pursuant to Section 5. Any such purported transfer shall be null and void, and shall not be recognized by the Company or recorded on its books.

7.             Escrow. All Shares which have not vested pursuant to Section 5, together with any securities distributed in respect thereof such as through a stock split or other recapitalization, shall be held by the Company in escrow until such time as the Shares have vested. The Company promptly shall release vested Shares from escrow.

8.             Plan. The Participant hereby acknowledges receipt of a copy of the Plan as presently in effect and the Prospectus with respect thereto. All of the terms and provisions of the Plan are incorporated herein by reference, and this Agreement is subject to those terms and provisions in all respects.

	VERTEX PHARMACEUTICALS INCORPORATED
	By:
	Name:
	Title:

 

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Exhibit 10.4

VERTEX PHARMACEUTICALS INCORPORATED
2006 STOCK AND OPTION PLAN

Form of Restricted Stock Award (Performance Accelerated Restricted Stock)

This Agreement sets forth the terms and conditions of a Stock Grant pursuant to the provisions of the 2006 Stock and Option Plan (the “ Plan ”) of Vertex Pharmaceuticals Incorporated (the “ Company ”) to the Participant whose name appears below, for the number of Shares of Common Stock of the Company set forth below, pursuant to the provisions of the Plan and on the following express terms and conditions. Capitalized terms not otherwise defined herein shall have the same meanings as set forth in the Plan.

1.             Name and address of Participant to whom the Shares are granted:

[name and address]

2.             Number of Shares in Stock Grant:

[        ] Shares

3.             Purchase price of Shares:

$0.01 per Share

4.             Date of grant of the Shares:

[        ]

5.             Vesting.

5.1          Vesting Schedule and Company’s Repurchase Right.

(a)           Except as otherwise provided in Sections 5.1(b) and 5.2, the Shares shall vest on the fourth anniversary of the date of grant of the Shares. Upon any Termination of Service of the Participant, vesting of the Shares shall immediately cease, and the Company shall have a right to repurchase any unvested Shares from the Participant at a price per Share equal to the purchase price per Share set forth in Section 3 above.  The Company’s right to so repurchase the Shares shall be valid for a period of one year beginning on the date of any Termination of Service of the Participant, or, if the Company is prohibited by law from such repurchase at the time of Termination of Service, for thirty days after any such prohibition is terminated.

(b)             Notwithstanding the foregoing:

[Describe Performance Objectives and Acceleration of Vesting for Achievement of Performance Objectives]

5.2         Death of the Participant.    If, at any time before all the Shares granted hereunder shall have vested as provided in Section 5.1, the Participant shall die while an employee of the Company or an Affiliate, the Company’s repurchase rights with respect to the Pro-Rata Portion of Shares shall lapse, and that number of Shares immediately shall vest. For purposes of this Restricted Stock Award, the “ Pro-

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Rata Portion of Shares ” shall mean that portion of the unvested Shares calculated by multiplying the number of unvested Shares by a fraction, the numerator of which is the sum of the number of days that have passed from the date of grant until the date of the Participant’s death, plus the number of days in one year, and the denominator of which is the total number of days in four years.

5.3         Agreement with respect to Tax Payments and Withholding. The Participant acknowledges and agrees that any income or other taxes due from the Participant with respect to the Shares issued pursuant to this Agreement, including on account of the vesting of the Shares, shall be the Participant’s responsibility. By accepting this Restricted Stock Award, the Participant agrees and acknowledges that (i)  the Company promptly will withhold from the Participant’s pay the amount of taxes the Company is required to withhold upon any vesting of Shares pursuant to this Restricted Stock Award, and (ii)  the Participant shall make immediate payment to the Company in the amount of any tax required to be withheld by the Company in excess of the Participant’s pay available for such withholding.

6.             Restrictions on Transfer. The Shares may not be sold, transferred, assigned, hypothecated, pledged, encumbered or otherwise disposed of, whether voluntarily or by operation of law, at any time before they become vested Shares pursuant to Section 5. Any such purported transfer shall be null and void, and shall not be recognized by the Company or recorded on its books.

7.             Escrow. Any Shares that have not vested pursuant to Section 5, together with any securities distributed in respect thereof, such as through a stock split or other recapitalization, shall be held by the Company in escrow until such Shares shall have vested. The Company promptly shall release vested Shares from escrow.

8.             Plan. The Participant hereby acknowledges receipt of a copy of the Plan as presently in effect and the Prospectus with respect thereto. All of the terms and provisions of the Plan are incorporated herein by reference, and this Agreement is subject to those terms and provisions in all respects.

		VERTEX PHARMACEUTICALS INCORPORATED
		By:
		Name:
		Title:

 

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