Document:

2001 STOCK INCENTIVE PLAN, AS AMENDED

 Exhibit 10.1 
  
 NMT Medical, Inc. 
  
 2001 STOCK INCENTIVE PLAN 
  
 1. Purpose 
  
 The purpose of this 2001 Stock Incentive Plan (the “Plan”) of NMT Medical, Inc., a Delaware corporation (the “Company”), is to advance
the interests of the Company’s stockholders by enhancing the Company’s ability to attract, retain and motivate persons who make (or are expected to make) important contributions to the Company by providing such persons with equity
ownership opportunities and performance-based incentives and thereby better aligning the interests of such persons with those of the Company’s stockholders. Except where the context otherwise requires, the term “Company” shall include
any of the Company’s present or future parent or subsidiary corporations as defined in Sections 424(e) or (f) of the Internal Revenue Code of 1986, as amended, and any regulations promulgated thereunder (the “Code”) and any other
business venture (including, without limitation, joint venture or limited liability company) in which the Company has a significant interest, as determined by the Board of Directors of the Company (the “Board”). 
  
 2. Eligibility 
  
 All of the Company’s employees, officers, directors, consultants and
advisors (and any individuals who have accepted an offer for employment) are eligible to be granted options or restricted stock awards (each, an “Award”) under the Plan. Each person who has been granted an Award under the Plan shall be
deemed a “Participant”. 
  
 3.
Administration and Delegation 
  
 (a) Administration by
Board of Directors. The Plan will be administered by the Board. The Board shall have authority to grant Awards and to adopt, amend and repeal such administrative rules, guidelines and practices relating to the Plan as it shall deem advisable.
The Board may correct any defect, supply any omission or reconcile any inconsistency in the Plan or any Award in the manner and to the extent it shall deem expedient to carry the Plan into effect and it shall be the sole and final judge of such
expediency. All decisions by the Board shall be made in the Board’s sole discretion and shall be final and binding on all persons having or claiming any interest in the Plan or in any Award. No director or person acting pursuant to the
authority delegated by the Board shall be liable for any action or determination relating to or under the Plan made in good faith. 

 (b) Appointment of Committees. To the extent permitted by applicable law, the Board may delegate
any or all of its powers under the Plan to one or more committees or subcommittees of the Board (a “Committee”). All references in the Plan to the “Board” shall mean the Board or a Committee of the Board to the extent that the
Board’s powers or authority under the Plan have been delegated to such Committee. 
  
 4. Stock Available for Awards 
  
 (a) Number of Shares. Subject to adjustment under Section 7, Awards may be made under the Plan for up to 500,000 shares of common stock, $.001 par
value per share, of the Company (the “Common Stock”). If any Award expires or is terminated, surrendered or canceled without having been fully exercised or is forfeited in whole or in part (including as the result of shares of Common Stock
subject to such Award being repurchased by the Company at the original issuance price pursuant to a contractual repurchase right) or results in any Common Stock not being issued, the unused Common Stock covered by such Award shall again be available
for the grant of Awards under the Plan, subject, however, in the case of Incentive Stock Options (as hereinafter defined), to any limitations under the Code. Shares issued under the Plan may consist in whole or in part of authorized but unissued
shares or treasury shares. 
  
 (b) Per-Participant Limit.
Subject to adjustment under Section 7, the maximum number of shares of Common Stock with respect to which Awards may be granted to any Participant under the Plan shall be 200,000 per calendar year. The per-Participant limit described in this Section
4(b) shall be construed and applied consistently with Section 162(m) of the Code (“Section 162(m)”). 
  
 5. Stock Options 
  
 (a) General. The Board may grant options to purchase Common Stock (each, an “Option”) and determine the number of shares of Common Stock
to be covered by each Option, the exercise price of each Option and the conditions and limitations applicable to the exercise of each Option, including conditions relating to applicable federal or state securities laws, as it considers necessary or
advisable. An Option which is not intended to be an Incentive Stock Option (as hereinafter defined) shall be designated a “Nonstatutory Stock Option”. 
  
 (b) Incentive Stock Options. An Option that the Board intends to be an “incentive stock option” as defined
in Section 422 of the Code (an “Incentive Stock Option”) shall only be granted to employees of the Company and shall be subject to and shall be construed consistently with the requirements of Section 422 of the Code. The Company shall have
no liability to a Participant, or any other party, if an Option (or any part thereof) which is intended to be an Incentive Stock Option is not an Incentive Stock Option. 
  
 (c) Exercise Price. The Board shall establish the exercise price at the time each Option is granted and specify it in
the applicable option agreement. 
  

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 (d) Duration of Options. Each Option shall be exercisable at such times and subject to such terms
and conditions as the Board may specify in the applicable option agreement. 
  
 (e) Exercise of Option. Options may be exercised by delivery to the Company of a written notice of exercise signed by the proper person or by any other form of notice (including electronic notice) approved by
the Board together with payment in full as specified in Section 5(f) for the number of shares for which the Option is exercised. 
  
 (f) Payment Upon Exercise. Common Stock purchased upon the exercise of an Option granted under the Plan shall be paid for as follows: 

 
 (1) in cash or by check, payable to the order of the
Company; 
  
 (2) except as the Board may, in its
sole discretion, otherwise provide in an option agreement, by (i) delivery of an irrevocable and unconditional undertaking by a creditworthy broker to deliver promptly to the Company sufficient funds to pay the exercise price and any required tax
withholding or (ii) delivery by the Participant to the Company of a copy of irrevocable and unconditional instructions to a creditworthy broker to deliver promptly to the Company cash or a check sufficient to pay the exercise price and any required
tax withholding; 
  
 (3) when the Common Stock is
registered under the Securities Exchange Act of 1934 (the “Exchange Act”), by delivery of shares of Common Stock owned by the Participant valued at their fair market value as determined by (or in a manner approved by) the Board in good
faith (“Fair Market Value”), provided (i) such method of payment is then permitted under applicable law and (ii) such Common Stock, if acquired directly from the Company was owned by the Participant at least six months prior to such
delivery; 
  
 (4) to the extent permitted by the
Board, in its sole discretion by (i) delivery of a promissory note of the Participant to the Company on terms determined by the Board, or (ii) payment of such other lawful consideration as the Board may determine; or 
  
 (5) by any combination of the above permitted forms of
payment. 
  
 (g) Substitute Options. In connection with a
merger or consolidation of an entity with the Company or the acquisition by the Company of property or stock of an entity, the Board may grant Options in substitution for any options or other stock or stock-based awards granted by such entity or an
affiliate thereof. Substitute Options may be granted on such terms as the Board deems appropriate in the circumstances, notwithstanding any limitations on Options contained in the other sections of this Section 5 or in Section 2. 
  
 6. Restricted Stock. 
  
 (a) Grants. The Board may grant Awards entitling recipients to
acquire shares of Common Stock, subject to the right of the Company to repurchase all or part of such shares at 
  

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 their issue price or other stated or formula price (or to require forfeiture of such shares if issued at no cost) from
the recipient in the event that conditions specified by the Board in the applicable Award are not satisfied prior to the end of the applicable restriction period or periods established by the Board for such Award (each, a “Restricted Stock
Award”). 
  
 (b) Terms and Conditions. The Board shall
determine the terms and conditions of any such Restricted Stock Award, including the conditions for repurchase (or forfeiture) and the issue price, if any. 
  
 (c) Stock Certificates. Any stock certificates issued in respect of a Restricted Stock Award shall be registered in the name of the Participant
and, unless otherwise determined by the Board, deposited by the Participant, together with a stock power endorsed in blank, with the Company (or its designee). At the expiration of the applicable restriction periods, the Company (or such designee)
shall deliver the certificates no longer subject to such restrictions to the Participant or if the Participant has died, to the beneficiary designated, in a manner determined by the Board, by a Participant to receive amounts due or exercise rights
of the Participant in the event of the Participant’s death (the “Designated Beneficiary”). In the absence of an effective designation by a Participant, Designated Beneficiary shall mean the Participant’s estate. 
  
 7. Adjustments for Changes in Common Stock and Certain
Other Events 
  
 (a) Changes in Capitalization. In the
event of any stock split, reverse stock split, stock dividend, recapitalization, combination of shares, reclassification of shares, spin-off or other similar change in capitalization or event, or any distribution to holders of Common Stock other
than a normal cash dividend, (i) the number and class of securities available under this Plan, (ii) the per-Participant limit set forth in Section 4(b), (iii) the number and class of securities and exercise price per share subject to each
outstanding Option, and (iv) the repurchase price per share subject to each outstanding Restricted Stock Award shall be appropriately adjusted by the Company (or substituted Awards may be made, if applicable) to the extent the Board shall determine,
in good faith, that such an adjustment (or substitution) is necessary and appropriate. If this Section 7(a) applies and Section 7(c) also applies to any event, Section 7(c) shall be applicable to such event, and this Section 7(a) shall not be
applicable. 
  
 (b) Liquidation or Dissolution. In the
event of a proposed liquidation or dissolution of the Company, the Board shall upon written notice to the Participants provide that all then unexercised Options will (i) become exercisable in full as of a specified time at least 10 business days
prior to the effective date of such liquidation or dissolution and (ii) terminate effective upon such liquidation or dissolution, except to the extent exercised before such effective date. The Board may specify the effect of a liquidation or
dissolution on any Restricted Stock Award granted under the Plan at the time of the grant. 
  
 (c) Reorganization Events 
  
 (1) Definition. A “Reorganization Event” shall mean: (a) any merger or consolidation of the Company with or into another entity as a result of which all of the Common 
  

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Stock of the Company is converted into or exchanged for the right to receive cash, securities or other property or (b) any exchange of all of the Common
Stock of the Company for cash, securities or other property pursuant to a share exchange transaction. 
  
 (2)    Consequences of a Reorganization Event on Options.    Upon the occurrence of a
Reorganization Event, or the execution by the Company of any agreement with respect to a Reorganization Event, the Board shall provide that all outstanding Options shall be assumed, or equivalent options shall be substituted, by the acquiring or
succeeding corporation (or an affiliate thereof). For purposes hereof, an Option shall be considered to be assumed if, following consummation of the Reorganization Event, the Option confers the right to purchase, for each share of Common Stock
subject to the Option immediately prior to the consummation of the Reorganization Event, the consideration (whether cash, securities or other property) received as a result of the Reorganization Event by holders of Common Stock for each share of
Common Stock held immediately prior to the consummation of the Reorganization Event (and if holders were offered a choice of consideration, the type of consideration chosen by the holders of a majority of the outstanding shares of Common Stock);
provided, however, that if the consideration received as a result of the Reorganization Event is not solely common stock of the acquiring or succeeding corporation (or an affiliate thereof), the Company may, with the consent of the acquiring or
succeeding corporation, provide for the consideration to be received upon the exercise of Options to consist solely of common stock of the acquiring or succeeding corporation (or an affiliate thereof) equivalent in fair market value to the per share
consideration received by holders of outstanding shares of Common Stock as a result of the Reorganization Event. 
  
 Notwithstanding the foregoing, if the acquiring or succeeding corporation (or an affiliate thereof) does not agree to assume, or substitute for, such
Options, then the Board shall, upon written notice to the Participants, provide that all then unexercised Options will become exercisable in full as of a specified time prior to the Reorganization Event and will terminate immediately prior to the
consummation of such Reorganization Event, except to the extent exercised by the Participants before the consummation of such Reorganization Event; provided, however, that in the event of a Reorganization Event under the terms of which holders of
Common Stock will receive upon consummation thereof a cash payment for each share of Common Stock surrendered pursuant to such Reorganization Event (the “Acquisition Price”), then the Board may instead provide that all outstanding Options
shall terminate upon consummation of such Reorganization Event and that each Participant shall receive, in exchange therefor, a cash payment equal to the amount (if any) by which (A) the Acquisition Price multiplied by the number of shares of Common
Stock subject to such outstanding Options (whether or not then exercisable), exceeds (B) the aggregate exercise price of such Options. To the extent all or any portion of an Option becomes exercisable solely as a result of the first sentence of this
paragraph, upon exercise of such Option the Participant shall receive shares subject to a right of repurchase by the Company or its successor at the Option exercise price. Such repurchase right (1) shall lapse at the same rate as the Option would
have become exercisable under its terms and (2) shall not apply to any shares subject to the Option that were exercisable under its terms without regard to the first sentence of this paragraph. 
  

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 (3) Consequences of a Reorganization Event on Restricted Stock Awards. Upon the
occurrence of a Reorganization Event, the repurchase and other rights of the Company under each outstanding Restricted Stock Award shall inure to the benefit of the Company’s successor and shall apply to the cash, securities or other property
which the Common Stock was converted into or exchanged for pursuant to such Reorganization Event in the same manner and to the same extent as they applied to the Common Stock subject to such Restricted Stock Award. 
  
 8. General Provisions Applicable to Awards

  
 (a) Transferability of Awards. Except as the Board may
otherwise determine or provide in an Award, Awards shall not be sold, assigned, transferred, pledged or otherwise encumbered by the person to whom they are granted, either voluntarily or by operation of law, except by will or the laws of descent and
distribution, and, during the life of the Participant, shall be exercisable only by the Participant. References to a Participant, to the extent relevant in the context, shall include references to authorized transferees. 
  
 (b) Documentation. Each Award shall be evidenced in such form
(written, electronic or otherwise) as the Board shall determine. Each Award may contain terms and conditions in addition to those set forth in the Plan. 
  
 (c) Board Discretion. Except as otherwise provided by the Plan, each Award may be made alone or in addition or in relation to any other Award. The
terms of each Award need not be identical, and the Board need not treat Participants uniformly. 
  
 (d) Termination of Status. The Board shall determine the effect on an Award of the disability, death, retirement, authorized leave of absence or
other change in the employment or other status of a Participant and the extent to which, and the period during which, the Participant, the Participant’s legal representative, conservator, guardian or Designated Beneficiary may exercise rights
under the Award. 
  
 (e) Withholding. Each Participant
shall pay to the Company, or make provision satisfactory to the Board for payment of, any taxes required by law to be withheld in connection with Awards to such Participant no later than the date of the event creating the tax liability. Except as
the Board may otherwise provide in an Award, when the Common Stock is registered under the Exchange Act, Participants may satisfy such tax obligations in whole or in part by delivery of shares of Common Stock, including shares retained from the
Award creating the tax obligation, valued at their Fair Market Value; provided, however, that the total tax withholding where stock is being used to satisfy such tax obligations cannot exceed the Company’s minimum statutory withholding
obligations (based on minimum statutory withholding rates for federal and state tax purposes, including payroll taxes, that are applicable to such supplemental taxable income). The Company may, to the extent permitted by law, deduct any such tax
obligations from any payment of any kind otherwise due to a Participant. 
  
 (f) Amendment of Award. The Board may amend, modify or terminate any outstanding Award, including but not limited to, substituting therefor another Award of the same 
  

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 or a different type, changing the date of exercise or realization, and converting an Incentive Stock Option to a
Nonstatutory Stock Option, provided that the Participant’s consent to such action shall be required unless the Board determines that the action, taking into account any related action, would not materially and adversely affect the Participant.

  
 (g) Conditions on Delivery of Stock. The Company will
not be obligated to deliver any shares of Common Stock pursuant to the Plan or to remove restrictions from shares previously delivered under the Plan until (i) all conditions of the Award have been met or removed to the satisfaction of the Company,
(ii) in the opinion of the Company’s counsel, all other legal matters in connection with the issuance and delivery of such shares have been satisfied, including any applicable securities laws and any applicable stock exchange or stock market
rules and regulations, and (iii) the Participant has executed and delivered to the Company such representations or agreements as the Company may consider appropriate to satisfy the requirements of any applicable laws, rules or regulations.

  
 (h) Acceleration. The Board may at any time provide
that any Award shall become immediately exercisable in full or in part, free of some or all restrictions or conditions, or otherwise realizable in full or in part, as the case may be. 
  
 9. Miscellaneous 
  
 (a) No Right To Employment or Other Status. No person shall have any claim or right to be granted an Award, and the
grant of an Award shall not be construed as giving a Participant the right to continued employment or any other relationship with the Company. The Company expressly reserves the right at any time to dismiss or otherwise terminate its relationship
with a Participant free from any liability or claim under the Plan, except as expressly provided in the applicable Award. 
  
 (b) No Rights As Stockholder. Subject to the provisions of the applicable Award, no Participant or Designated Beneficiary shall have any rights as
a stockholder with respect to any shares of Common Stock to be distributed with respect to an Award until becoming the record holder of such shares. Notwithstanding the foregoing, in the event the Company effects a split of the Common Stock by means
of a stock dividend and the exercise price of and the number of shares subject to such Option are adjusted as of the date of the distribution of the dividend (rather than as of the record date for such dividend), then an optionee who exercises an
Option between the record date and the distribution date for such stock dividend shall be entitled to receive, on the distribution date, the stock dividend with respect to the shares of Common Stock acquired upon such Option exercise,
notwithstanding the fact that such shares were not outstanding as of the close of business on the record date for such stock dividend. 
  
 (c) Effective Date and Term of Plan. The Plan shall become effective on the date on which it is adopted by the Board, but no Award granted to a
Participant that is intended to comply with Section 162(m) shall become exercisable, vested or realizable, as applicable to such Award, unless and until the Plan has been approved by the Company’s stockholders to the extent stockholder approval
is required by Section 162(m) in the manner required under Section 162(m) 
  

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 (including the vote required under Section 162(m)). No Awards shall be granted under the Plan after the
completion of ten years from the earlier of (i) the date on which the Plan was adopted by the Board or (ii) the date the Plan was approved by the Company’s stockholders, but Awards previously granted may extend beyond that date. 
  
 (d) Amendment of Plan. The Board may amend, suspend or
terminate the Plan or any portion thereof at any time, provided that to the extent required by Section 162(m), no Award granted to a Participant that is intended to comply with Section 162(m) after the date of such amendment shall become
exercisable, realizable or vested, as applicable to such Award, unless and until such amendment shall have been approved by the Company’s stockholders if required by Section 162(m) (including the vote required under Section 162(m)). 

 
 (e) Governing Law. The provisions of the Plan and
all Awards made hereunder shall be governed by and interpreted in accordance with the laws of the State of Delaware, without regard to any applicable conflicts of law. 
  
 Adopted by the Board of Directors on April 26, 2001. 
 Approved by the Stockholders of June 7, 2001. 
  
  

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 NMT MEDICAL, INC. 
  

Amendment No. 1 
  
 to 
  
 2001
Stock Incentive Plan 
  
 The 2001 Stock Incentive Plan (the “Plan”) of
NMT Medical, Inc. (the “Company”) is hereby amended as follows (capitalized terms used herein and not defined herein shall have the respective meaning ascribed to such terms in the Plan): 
  
 1.    The first sentence of Section 4(a) of the Plan shall be deleted in
its entirety and replaced with the following: 
  

	“Subject to adjustment under Section 7, Awards may be made under the Plan for up to 700,000 shares of common stock, $.001 par value per share, of the Company (the “Common
Stock”).”

  
 Except as aforesaid, the Plan shall
remain in full force and effect. 
  
 Adopted by the Board of
Directors on February 20, 2003. 
 Approved by the Stockholders on June 18, 2003. 
  

 -9-2001 EMPLOYEE STOCK PURCHASE PLAN, AS AMENDED

 Exhibit 10.2 
  
 NMT Medical, Inc. 
  
 2001 EMPLOYEE STOCK PURCHASE PLAN 
  
 April 26, 2001 
  
 The purpose of this Plan is to
provide eligible employees of NMT Medical, Inc. (the “Company”) and certain of its subsidiaries with opportunities to purchase shares of the Company’s common stock, $.001 par value (the “Common Stock”), commencing on June 7,
2001. One hundred and twenty-five thousand (125,000) shares of Common Stock in the aggregate have been approved for this purpose. This Plan is intended to qualify as an “employee stock purchase plan” as defined in Section 423 of the
Internal Revenue Code of 1986, as amended (the “Code”), and the regulations promulgated thereunder, and shall be interpreted consistent therewith. 
  
 1. Administration. The Plan will be administered by the Company’s Board of Directors (the “Board”) or by a Committee
appointed by the Board (the “Committee”). The Board or the Committee has authority to make rules and regulations for the administration of the Plan and its interpretation and decisions with regard thereto shall be final and conclusive.

  
 2. Eligibility. All employees of the
Company, including Directors who are employees, and all employees of any subsidiary of the Company (as defined in Section 424(f) of the Code) designated by the Board or the Committee from time to time (a “Designated Subsidiary”), are
eligible to participate in any one or more of the offerings of Options (as defined in Section 9) to purchase Common Stock under the Plan provided that: 
  
 (a) they are customarily employed by the Company or a Designated Subsidiary for more than 20 hours a week and for more than five months in
a calendar year; and 
  
 (b) they have been
employed by the Company or a Designated Subsidiary for at least three months prior to enrolling in the Plan; and 
  
 (c) they are employees of the Company or a Designated Subsidiary on the first day of the applicable Plan Period (as defined below).

  
 No employee may be granted an option hereunder if such
employee, immediately after the option is granted, owns 5% or more of the total combined voting power or value of the stock of the Company or any subsidiary. For purposes of the preceding sentence, the attribution rules of Section 424(d) of the Code
shall apply in determining the stock ownership of an employee, and all stock which the employee has a contractual right to purchase shall be treated as stock owned by the employee. 
  

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 3. Offerings. The Company will make one or more offerings (“Offerings”) to employees to
purchase stock under this Plan. Offerings will begin each April 1st and October 1st, or the first business day thereafter (the “Offering Commencement Dates”). Each Offering Commencement Date will begin a six month period (a “Plan
Period”) during which payroll deductions will be made and held for the purchase of Common Stock at the end of the Plan Period. The Board or the Committee may, at its discretion, choose a different Plan Period of twelve (12) months or less for
subsequent Offerings. Notwithstanding anything to the contrary, the first Plan Period shall begin on the first date following the approval of the Plan by the Company’s Stockholders and shall end on September 30, 2001. 
  
 4. Participation. An employee eligible on the Offering Commencement
Date of any Offering may participate in such Offering by completing and forwarding a payroll deduction authorization form to the employee’s appropriate payroll office at least 10 days prior to the applicable Offering Commencement Date. The form
will authorize a regular payroll deduction from the Compensation received by the employee during the Plan Period. Unless an employee files a new form or withdraws from the Plan, his deductions and purchases will continue at the same rate for future
Offerings under the Plan as long as the Plan remains in effect. The term “Compensation” means the amount of money reportable on the employee’s Federal Income Tax Withholding Statement, excluding overtime, shift premium, incentive or
bonus awards, allowances and reimbursements for expenses such as relocation allowances for travel expenses, income or gains on the exercise of Company stock options or stock appreciation rights, and similar items, whether or not shown on the
employee’s Federal Income Tax Withholding Statement, but including, in the case of salespersons, sales commissions to the extent determined by the Board or the Committee. 
  
 5. Deductions. The Company will maintain payroll deduction accounts for all participating employees. With respect to
any Offering made under this Plan, an employee may authorize a payroll deduction in any dollar amount up to a maximum of 12% of the Compensation he or she receives during the Plan Period or such shorter period during which deductions from payroll
are made. The minimum payroll deduction is such percentage of compensation as may be established from time to time by the Board or the Committee. 
  
 No employee may be granted an Option (as defined in Section 9) which permits his rights to purchase Common Stock under this Plan and any other employee
stock purchase plan (as defined in Section 423(b) of the Code) of the Company and its subsidiaries, to accrue at a rate which exceeds $25,000 of the fair market value of such Common Stock (determined at the Offering Commencement Date of the Plan
Period) for each calendar year in which the Option is outstanding at any time. 
  
 6. Deduction Changes. An employee may decrease or discontinue his payroll deduction once during any Plan Period, by filing a new payroll deduction authorization form. However, an employee may not increase his
payroll deduction during a Plan Period. If an employee elects to discontinue his payroll deductions during a Plan Period, but does not elect to withdraw his funds pursuant to Section 8 hereof, funds deducted prior to his election to discontinue will
be applied to the purchase of Common Stock on the Exercise Date (as defined below). 
  

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 7. Interest. Interest will not be paid on any employee accounts, except to the extent that the
Board or the Committee, in its sole discretion, elects to credit employee accounts with interest at such per annum rate as it may from time to time determine. 
  

8. Withdrawal of Funds. An employee may at any time prior to the close of business on the last business day in a Plan Period and for any reason
permanently draw out the balance accumulated in the employee’s account and thereby withdraw from participation in an Offering. Partial withdrawals are not permitted. The employee may not begin participation again during the remainder of the
Plan Period. The employee may participate in any subsequent Offering in accordance with terms and conditions established by the Board or the Committee. 
  
 9. Purchase of Shares. On the Offering Commencement Date of each Plan Period, the Company will grant to each eligible employee who is then a
participant in the Plan an option (“Option”) to purchase on the last business day of such Plan Period (the “Exercise Date”), at the Option Price hereinafter provided for, the largest number of whole shares of Common Stock of the
Company as does not exceed the number of shares determined by multiplying $2,083 by the number of full months in the Offering Period and dividing the result by the closing price (as defined below) on the Offering Commencement Date of such Plan
Period. 
  
 The purchase price for each share purchased will be
85% of the closing price of the Common Stock on (i) the first business day of such Plan Period or (ii) the Exercise Date, whichever closing price shall be less. Such closing price shall be (a) the closing price on any national securities exchange on
which the Common Stock is listed, (b) the closing price of the Common Stock on the Nasdaq National Market or (c) the average of the closing bid and asked prices in the over-the-counter-market, whichever is applicable, as published in The Wall
Street Journal. If no sales of Common Stock were made on such a day, the price of the Common Stock for purposes of clauses (a) and (b) above shall be the reported price for the next preceding day on which sales were made. 
  
 Each employee who continues to be a participant in the Plan on the Exercise
Date shall be deemed to have exercised his Option at the Option Price on such date and shall be deemed to have purchased from the Company the number of full shares of Common Stock reserved for the purpose of the Plan that his accumulated payroll
deductions on such date will pay for, but not in excess of the maximum number determined in the manner set forth above. 
  
 Any balance remaining in an employee’s payroll deduction account at the end of a Plan Period will be automatically refunded to the employee, except
that any balance which is less than the purchase price of one share of Common Stock will be carried forward into the employee’s payroll deduction account for the following Offering, unless the employee elects not to participate in the following
Offering under the Plan, in which case the balance in the employee’s account shall be refunded. 
  
 10. Issuance of Certificates. Certificates representing shares of Common Stock purchased under the Plan may be issued only in the name of the
employee, in the name of the employee and another person of legal age as joint tenants with rights of survivorship, or (in the Company’s sole discretion) in the name of a brokerage firm, bank or other nominee holder 

  

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designated by the employee. The Company may, in its sole discretion and in compliance with applicable laws, authorize the use of book entry registration of
shares in lieu of issuing stock certificates. 
  
 11. Rights on
Retirement, Death or Termination of Employment. In the event of a participating employee’s termination of employment prior to the last business day of a Plan Period, no payroll deduction shall be taken from any pay due and owing to an
employee and the balance in the employee’s account shall be paid to the employee or, in the event of the employee’s death, (a) to a beneficiary previously designated in a revocable notice signed by the employee (with any spousal consent
required under state law) or (b) in the absence of such a designated beneficiary, to the executor or administrator of the employee’s estate or (c) if no such executor or administrator has been appointed to the knowledge of the Company, to such
other person(s) as the Company may, in its discretion, designate. If, prior to the last business day of the Plan Period, the Designated Subsidiary by which an employee is employed shall cease to be a subsidiary of the Company, or if the employee is
transferred to a subsidiary of the Company that is not a Designated Subsidiary, the employee shall be deemed to have terminated employment for the purposes of this Plan. 
  
 12. Optionees Not Stockholders. Neither the granting of an Option to an employee nor the deductions from his pay
shall constitute such employee a stockholder of the shares of Common Stock covered by an Option under this Plan until such shares have been purchased by and issued to him. 
  
 13. Rights Not Transferable. Rights under this Plan are not transferable by a participating employee other than by
will or the laws of descent and distribution, and are exercisable during the employee’s lifetime only by the employee. 
  
 14. Application of Funds. All funds received or held by the Company under this Plan may be combined with other corporate funds and may be used for
any corporate purpose. 
  
 15. Adjustment in Case of Changes
Affecting Common Stock. In the event of a subdivision of outstanding shares of Common Stock, or the payment of a dividend in Common Stock, the number of shares approved for this Plan, and the share limitation set forth in Section 9, shall be
increased proportionately, and such other adjustment shall be made as may be deemed equitable by the Board or the Committee. In the event of any other change affecting the Common Stock, such adjustment shall be made as may be deemed equitable by the
Board or the Committee to give proper effect to such event. 
  
 16. Merger. If the Company shall at any time merge or consolidate with another corporation and the holders of the capital stock of the Company immediately prior to such merger or consolidation continue to hold at least 80% by voting
power of the capital stock of the surviving corporation (“Continuity of Control”), the holder of each Option then outstanding will thereafter be entitled to receive at the next Exercise Date upon the exercise of such Option for each share
as to which such Option shall be exercised the securities or property which a holder of one share of the Common Stock was entitled to upon and at the time of such merger or consolidation, and the Board or the Committee shall take such steps in
connection with such merger or consolidation as the Board or the Committee shall deem necessary to assure that the 

  

 4 

 
provisions of Section 15 shall thereafter be applicable, as nearly as reasonably may be, in relation to the said securities or property as to which such
holder of such Option might thereafter be entitled to receive thereunder. 
  
 In the event of a merger or consolidation of the Company with or into another corporation which does not involve Continuity of Control, or of a sale of all or substantially all of the assets of the Company while
unexercised Options remain outstanding under the Plan, (a) subject to the provisions of clauses (b) and (c), after the effective date of such transaction, each holder of an outstanding Option shall be entitled, upon exercise of such Option, to
receive in lieu of shares of Common Stock, shares of such stock or other securities as the holders of shares of Common Stock received pursuant to the terms of such transaction; or (b) all outstanding Options may be cancelled by the Board or the
Committee as of a date prior to the effective date of any such transaction and all payroll deductions shall be paid out to the participating employees; or (c) all outstanding Options may be cancelled by the Board or the Committee as of the effective
date of any such transaction, provided that notice of such cancellation shall be given to each holder of an Option, and each holder of an Option shall have the right to exercise such Option in full based on payroll deductions then credited to his
account as of a date determined by the Board or the Committee, which date shall not be less than ten (10) days preceding the effective date of such transaction. 
  

17. Amendment of the Plan. The Board may at any time, and from time to time, amend this Plan in any respect, except that (a) if the approval of
any such amendment by the shareholders of the Company is required by Section 423 of the Code, such amendment shall not be effected without such approval, and (b) in no event may any amendment be made which would cause the Plan to fail to comply with
Section 423 of the Code. 
  
 18. Insufficient Shares. In
the event that the total number of shares of Common Stock specified in elections to be purchased under any Offering plus the number of shares purchased under previous Offerings under this Plan exceeds the maximum number of shares issuable under this
Plan, the Board or the Committee will allot the shares then available on a pro rata basis. 
  
 19. Termination of the Plan. This Plan may be terminated at any time by the Board. Upon termination of this Plan all amounts in the accounts of participating employees shall be promptly refunded. 
  
 20. Governmental Regulations. The Company’s obligation to sell
and deliver Common Stock under this Plan is subject to listing on a national stock exchange or quotation on the Nasdaq National Market (to the extent the Common Stock is then so listed or quoted) and the approval of all governmental authorities
required in connection with the authorization, issuance or sale of such stock. 
  
 21. Governing Law. The Plan shall be governed by Delaware law except to the extent that such law is preempted by federal law. 
  
 22. Issuance of Shares. Shares may be issued upon exercise of an Option from authorized but unissued Common Stock,
from shares held in the treasury of the Company, or from any other proper source. 
  

 5 

 23. Notification upon Sale of Shares. Each employee agrees, by entering the Plan, to promptly give
the Company notice of any disposition of shares purchased under the Plan where such disposition occurs within two years after the date of grant of the Option pursuant to which such shares were purchased. 
  
 24. Effective Date and Approval of Shareholders. The Plan shall take
effect on June 7, 2001, subject to approval by the shareholders of the Company as required by Section 423 of the Code, which approval must occur within twelve months of the adoption of the Plan by the Board. 
  
 Adopted by the Board of Directors 
 on April 26, 2001 
  
 Approved by the stockholders on June 7, 2001 
  

 6 

 NMT MEDICAL, INC. 
  

Amendment No. 1 
  
 to 
  
 2001
Employee Stock Purchase Plan 
  
 The 2001 Employee Stock Purchase Plan (the
“Plan”) of NMT Medical, Inc. is hereby amended as follows (capitalized terms used herein and not defined herein shall have the respective meaning ascribed to such terms in the Plan): 
  
 1.    The first paragraph of the Plan shall be deleted in its entirety
and replaced with the following: 
  

	“The purpose of this Plan is to provide eligible employees of NMT Medical, Inc. (the “Company”) and certain of its subsidiaries with opportunities to purchase shares
of the Company’s common stock, $.001 par value (the “Common Stock”), commencing on June 7, 2001. Two hundred and seventy-five thousand (275,000) shares of Common Stock in the aggregate have been approved for this purpose. This Plan is
intended to qualify as an “employee stock purchase plan” as defined in Section 423 of the Internal Revenue Code of 1986, as amended (the “Code”), and the regulations promulgated thereunder, and shall be interpreted consistent
therewith.”

  
 Except as aforesaid, the Plan shall
remain in full force and effect. 
  
 Adopted by the Board of
Directors on February 20, 2003. 
 Approved by the Stockholders on June 18, 2003. 
  

 7

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