2011 Equity Incentive Plan, as amended



 Exhibit 10.2.1 
 RIB-X PHARMACEUTICALS, INC. 
 2011 EQUITY INCENTIVE PLAN, AS AMENDED

  

	 	1.	DEFINITIONS. 

 Unless
otherwise specified or unless the context otherwise requires, the following terms, as used in this Rib-X Pharmaceuticals, Inc. 2011 Equity Incentive Plan, have the following meanings: 

Administrator means the Board of Directors, unless it has delegated power to act on its behalf to the Committee, in which case the
Administrator means the Committee. 
 Affiliate means a corporation which, for purposes of Section 424 of the Code,
is a parent or subsidiary of the Company, direct or indirect. 
 Agreement means an agreement between the Company and a
Participant delivered pursuant to the Plan and pertaining to a Stock Right, in such form as the Administrator shall approve. 

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

Cause means, with respect to a Participant (a) dishonesty with respect to the Company or any Affiliate,
(b) insubordination, substantial malfeasance or non-feasance of duty, (c) unauthorized disclosure of confidential information, (d) breach by a Participant of any provision of any employment, consulting, advisory, nondisclosure,
non-competition or similar agreement between the Participant and the Company or any Affiliate, and (e) conduct substantially prejudicial to the business of the Company or any Affiliate; provided, however, that any provision in an agreement
between a Participant and the Company or an Affiliate, which contains a conflicting definition of Cause for termination and which is in effect at the time of such termination, shall supersede this definition with respect to that Participant. The
determination of the Administrator as to the existence of Cause will be conclusive on the Participant and the Company. 

Code means the United States Internal Revenue Code of 1986, as amended including any successor statute, regulation and guidance
thereto. 
 Committee means the committee of the Board of Directors to which the Board of Directors has delegated power to
act under or pursuant to the provisions of the Plan. 
 Common Stock means shares of the Company’s common stock,
$0.001 par value per share. 
 Company means Rib-X Pharmaceuticals, Inc., a Delaware corporation. 

  
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 Consultant means any natural person who is an advisor or consultant that provides
bona fide services to the Company or its Affiliates, provided that such services are not in connection with the offer or sale of securities in a capital raising transaction, and do not directly or indirectly promote or maintain a market for the
Company’s or its Affiliates’ securities. 
 Disability or Disabled means permanent and total disability
as defined in Section 22(e)(3) of the Code. 
 Employee means any 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 means: 

(1) If the Common Stock is listed on a national securities exchange or traded in the over-the-counter market and sales
prices are regularly reported for the Common Stock, the closing or, if not applicable, the last price of the Common Stock on the composite tape or other comparable reporting system for the trading day on the applicable date and if such applicable
date is not a trading day, the last market trading day prior to such date; 
 (2) If the Common Stock is not
traded on a national securities exchange but is traded on the over-the-counter market, if sales prices are not regularly reported for the Common Stock for the trading day referred to in clause (1), and if bid and asked prices for the Common
Stock are regularly reported, the mean between the bid and the asked price for the Common Stock at the close of trading in the over-the-counter market for the trading day on which Common Stock was traded on the applicable date and if such applicable
date is not a trading day, the last market trading day prior to such date; and 
 (3) If the Common Stock is
neither listed on a national securities exchange nor traded in the over-the-counter market, such value as the Administrator, in good faith, shall determine. 
 ISO means an option intended to qualify as an incentive stock option under Section 422 of the Code. 
 Non-Qualified Option means an option which is not intended to qualify as an ISO. 
 Option means an ISO or Non-Qualified Option granted under the Plan. 

Participant means an Employee, director or Consultant 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” where the context requires. 

  
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 Plan means this Rib-X Pharmaceuticals, Inc. 2011 Equity Incentive Plan, as amended.

 Securities Act means the Securities Act of 1933, as amended. 

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 Paragraph 3 of the Plan. The Shares issued under the Plan may be authorized and unissued shares or shares held by the Company in its
treasury, or both. 
 Stock-Based Award means a grant by the Company under the Plan of an equity award or an equity based
award which is not an Option or a 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 — an ISO, a
Non-Qualified Option, a Stock Grant or a Stock-Based Award. 
 Survivor means a deceased Participant’s legal
representatives and/or any person or persons who acquired the Participant’s rights to a Stock Right by will or by the laws of descent and distribution. 
  

	 	2.	PURPOSES OF THE PLAN. 


The Plan is intended to encourage ownership of Shares by Employees and directors of and certain Consultants to the Company and its
Affiliates in order to attract and retain such people, 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 ISOs, Non-Qualified Options, Stock Grants and Stock-Based Awards. 
  

	 	3.	SHARES SUBJECT TO THE PLAN. 

 (a) The number of Shares which may be issued from time to time pursuant to this Plan shall be 14,176,650,000, 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 Paragraph 24 of the Plan. 
 (b) Notwithstanding Subparagraph (a) above, on the first day of each fiscal year of the Company during the period beginning in fiscal year 2013, and ending on the second day of fiscal year 2021, the
number of Shares that may be issued from time to time pursuant to the Plan, shall be automatically increased by an amount equal to the lesser of (i) 3,629,222,400 or the equivalent of such number of Shares after the Administrator, in its sole
discretion, has interpreted 

  
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the effect of any stock split, stock dividend, combination, recapitalization or similar transaction in accordance with Paragraph 24 of the Plan; (ii) 4% of the number of outstanding shares
of Common Stock on such date; and (iii) an amount determined by the Board of Directors. 
 (c) If an Option ceases to be
“outstanding”, in whole or in part (other than by exercise), or if the Company shall reacquire (at not more than its original issuance price) any Shares issued pursuant to a Stock Grant or Stock-Based Award, or if any Stock Right expires
or is forfeited, cancelled, or otherwise terminated or results in any Shares not being issued, the unissued or reacquired Shares which were subject to such Stock Right shall again be available for issuance from time to time pursuant to this Plan.
Notwithstanding the foregoing, if a Stock Right is exercised, in whole or in part, by tender of Shares or if the Company or an Affiliate’s tax withholding obligation is satisfied by withholding Shares, the number of Shares deemed to have been
issued under the Plan for purposes of the limitation set forth in Paragraph 3(a) above shall be the number of Shares that were subject to the Stock Right or portion thereof, and not the net number of Shares actually issued. However, in the case of
ISOs, the foregoing provisions shall be subject to any limitations under the Code. 
  

	 	4.	ADMINISTRATION OF THE PLAN. 

 The Administrator of the Plan will be the Board of Directors, except to the extent the Board of Directors delegates its authority to the Committee, in which case the Committee shall be the Administrator.
Subject to the provisions of the Plan, the Administrator is authorized to: 
 (a) Interpret the provisions of the Plan and all
Stock Rights and to make all rules and determinations which it deems necessary or advisable for the administration of the Plan; 

(b) Determine which Employees, directors and Consultants shall be granted Stock Rights; 

(c) Determine the number of Shares for which a Stock Right or Stock Rights shall be granted, provided, however, that in no event shall
Stock Rights with respect to more than 3,629,222,400 Shares be granted to any Participant in any fiscal year; 
 (d) Specify the
terms and conditions upon which a Stock Right or Stock Rights may be granted; 
 (e) Amend any term or condition of any
outstanding Stock Right, including, without limitation, to reduce or increase the exercise price or purchase price, accelerate the vesting schedule or extend the expiration date, provided that (i) such term or condition as amended is permitted
by the Plan; (ii) any such amendment shall not impair the rights of a Participant under any Stock Right previously granted without such Participant’s consent or in the event of death of the Participant the Participant’s Survivors; and
(iii) any such amendment shall be made only after the Administrator determines whether such amendment would cause any adverse tax consequences to the Participant, including, but not limited to, the annual vesting limitation contained in
Section 422(d) of the Code and described in Paragraph 6(b)(iv) below with respect to ISOs and pursuant to Section 409A of the Code; 

  
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 (f) Buy out for a payment in cash or Shares, a Stock Right previously granted and/or cancel
any such Stock Right and grant in substitution therefor other Stock Rights, covering the same or a different number of Shares and having an exercise price or purchase price per share which may be lower or higher than the exercise price or purchase
price of the cancelled Stock Right, based on such terms and conditions as the Administrator shall establish and the Participant shall accept; and 
 (g) Adopt any sub-plans applicable to residents of any specified jurisdiction as it deems necessary or appropriate in order to comply with or take advantage of any tax or other laws applicable to the
Company, any Affiliate or to Participants or to otherwise facilitate the administration of the Plan, which sub-plans may include additional restrictions or conditions applicable to Stock Rights or Shares issuable pursuant to a Stock Right;

 provided, however, that all such interpretations, rules, determinations, terms and conditions shall be made and prescribed in the context of
not causing any adverse tax consequences under Section 409A of the Code and preserving the tax status under Section 422 of the Code of those Options which are designated as ISOs. 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 the Committee. In addition, if the Administrator is
the Committee, the Board of Directors may take any action under the Plan that would otherwise be the responsibility of the Committee. 
 To the extent permitted under applicable law, the Board of Directors or the Committee may allocate all or any portion of its responsibilities and powers to any one or more of its members and may delegate
all or any portion of its responsibilities and powers to any other person selected by it. The Board of Directors or the Committee may revoke any such allocation or delegation at any time. Notwithstanding the foregoing, only the Board of Directors or
the Committee shall be authorized to grant a Stock Right to any director of the Company or to any “officer” of the Company as defined by Rule 16a-1 under the Exchange Act. 

 

	 	5.	ELIGIBILITY FOR PARTICIPATION. 

 The Administrator will, in its sole discretion, name the Participants in the Plan; provided, however, that each Participant must be an Employee, director or Consultant 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, director or Consultant 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 the execution of the Agreement evidencing such Stock Right. ISOs may be granted only to Employees who are
deemed to be residents of the United States for tax purposes. Non-Qualified Options, Stock Grants and Stock-Based Awards may be granted to any Employee, director or Consultant of the Company or an Affiliate. The granting of any Stock Right to any
individual shall neither entitle that individual to, nor disqualify him or her from, participation in any other grant of Stock Rights or any grant under any other benefit plan established by the Company or any Affiliate for Employees, directors or
Consultants. 

  
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	 	6.	TERMS AND CONDITIONS OF OPTIONS. 

 Each Option shall be set forth in writing in an Option 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
shareholders of the Company of this Plan or any amendments thereto. The Option Agreements shall be subject to at least the following terms and conditions: 
 (a) Non-Qualified Options: Each Option intended to be a Non-Qualified Option shall be subject to the terms and conditions which the Administrator determines to be appropriate and in the best
interest of the Company, subject to the following minimum standards for any such Non-Qualified Option: 
  

	 	(i)	Exercise Price: Each Option Agreement shall state the exercise price (per share) of the Shares covered by each Option, which exercise price shall be determined
by the Administrator and shall be at least equal to the Fair Market Value per share of Common Stock on the date of grant of the Option. 

  

	 	(ii)	Number of Shares: Each Option Agreement shall state the number of Shares to which it pertains. 


 

	 	(iii)	Option Periods: Each Option Agreement shall state the date or dates on which it first is exercisable and the date after which it may no longer be exercised, and
may provide that the Option rights accrue or become exercisable in installments over a period of months or years, or upon the occurrence of certain conditions or the attainment of stated goals or events. 


 

	 	(iv)	Option Conditions: Exercise of any Option may be conditioned upon the Participant’s execution of a Share purchase agreement in form satisfactory to the
Administrator providing for certain protections for the Company and its other shareholders, including requirements that: 

  

	 	A.	The Participant’s or the Participant’s Survivors’ right to sell or transfer the Shares may be restricted; and 


 

	 	B.	The Participant or the Participant’s Survivors may be required to execute letters of investment intent and must also acknowledge that the Shares will bear legends
noting any applicable restrictions. 

  

	 	(v)	Term of Option: Each Option shall terminate not more than ten years from the date of the grant or at such earlier time as the Option Agreement may provide.



  
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 (b) ISOs: Each Option intended to be an ISO shall be issued only to an Employee who
is deemed to be a resident of the United States for tax purposes, and 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
Section 422 of the Code and relevant regulations and rulings of the Internal Revenue Service: 
  

	 	(i)	Minimum standards: The ISO shall meet the minimum standards required of Non-Qualified Options, as described in Paragraph 6(a) above, except clause (i) and
(v) thereunder. 

  

	 	(ii)	Exercise Price: Immediately before the ISO is granted, if the Participant owns, directly or by reason of the applicable attribution rules in Section 424(d)
of the Code: 

  

	 	A.	10% or less of the total combined voting power of all classes of stock of the Company or an Affiliate, the exercise price per share of the Shares covered by each
ISO shall not be less than 100% of the Fair Market Value per share of the Common Stock on the date of grant of the Option; or 

  

	 	B.	More than 10% of the total combined voting power of all classes of stock of the Company or an Affiliate, the exercise price per share of the Shares covered by each ISO
shall not be less than 110% of the Fair Market Value per share of the Common Stock on the date of grant of the Option. 

  

	 	(iii)	Term of Option: For Participants who own: 

  

	 	A.	10% or less of the total combined voting power of all classes of stock of the Company or an Affiliate, each ISO shall terminate not more than ten years from the
date of the grant or at such earlier time as the Option Agreement may provide; or 

  

	 	B.	More than 10% of the total combined voting power of all classes of stock of the Company or an Affiliate, each ISO shall terminate not more than five years from the date
of the grant or at such earlier time as the Option Agreement may provide. 

  

	 	(iv)	Limitation on Yearly Exercise: The Option Agreements shall restrict the amount of ISOs which may become exercisable in any calendar year (under this or any other
ISO plan of the Company or an Affiliate) so that the aggregate Fair Market Value (determined on the date each ISO is granted) of the stock with respect to which ISOs are exercisable for the first time by the Participant in any calendar year does not
exceed $100,000. 


  
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	 	7.	TERMS AND CONDITIONS OF STOCK GRANTS. 

 Each Stock Grant to a Participant shall state the principal terms in an Agreement duly executed by the Company and, to the extent required by law or requested by the Company, by the Participant. The
Agreement shall be in a form approved by the Administrator and shall contain terms and conditions which the Administrator determines to be appropriate and in the best interest of the Company, subject to the following minimum standards: 

(a) Each Agreement shall state the purchase price per share, if any, of the Shares covered by each Stock Grant, which purchase price
shall be determined by the Administrator but shall not be less than the minimum consideration required by the Delaware General Corporation Law, if any, on the date of the grant of the Stock Grant; 

(b) Each Agreement shall state the number of Shares to which the Stock Grant pertains; and 

(c) Each Agreement shall include the terms of any right of the Company to restrict or reacquire the Shares subject to the Stock Grant,
including the time and events upon which such rights shall accrue and the purchase price therefor, if any. 
  

	 	8.	TERMS AND CONDITIONS OF OTHER STOCK-BASED AWARDS. 

 The Administrator shall have the right to grant other Stock-Based Awards based upon the Common Stock 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 of stock appreciation rights, phantom stock awards or stock units. The principal terms of each Stock-Based Award shall be set forth in an
Agreement, duly executed by the Company and, to the extent required by law or requested by the Company, by the Participant. The Agreement shall be in a form approved by the Administrator and shall contain terms and conditions which the Administrator
determines to be appropriate and in the best interest of the Company. 
 The Company intends that the Plan and any Stock-Based
Awards granted hereunder be exempt from the application of Section 409A of the Code or meet the requirements of paragraphs (2), (3) and (4) of subsection (a) of Section 409A of the Code, to the extent applicable, and be
operated in accordance with Section 409A so that any compensation deferred under any Stock-Based Award (and applicable investment earnings) shall not be included in income under Section 409A of the Code. Any ambiguities in the Plan shall
be construed to effect the intent as described in this Paragraph 8. 
  

	 	9.	EXERCISE OF OPTIONS AND ISSUE OF SHARES. 

 An Option (or any part or installment thereof) shall be exercised by giving written notice to the Company or its designee (in a form acceptable to the Administrator, which may include electronic notice),
together with provision for payment of the aggregate exercise price in accordance with this Paragraph for the Shares as to which the Option is being exercised, and upon compliance with any other condition(s) set forth in the Option Agreement. Such
notice shall be signed by the person exercising the Option (which signature may be provided electronically in a form acceptable to the Administrator), shall state the number of Shares with respect to which the Option is being exercised and shall
contain any representation required by 

  
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the Plan or the Option Agreement. Payment of the exercise 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, or
(b) at the discretion of the Administrator, through delivery of shares of Common Stock held for at least six months (if required to avoid negative accounting treatment) having a Fair Market Value equal as of the date of the exercise to the
aggregate cash exercise price for the number of Shares as to which the Option is being exercised, or (c) at the discretion of the Administrator, by having the Company retain from the Shares otherwise issuable upon exercise of the Option, a
number of Shares having a Fair Market Value equal as of the date of exercise to the aggregate exercise price for the number of Shares as to which the Option is being exercised, or (d) at the discretion of the Administrator, in accordance with a
cashless exercise program established with a securities brokerage firm, and approved by the Administrator, or (e) at the discretion of the Administrator, by any combination of (a), (b), (c) and (d) above or (f) at the discretion
of the Administrator, by payment of such other lawful consideration as the Administrator may determine. 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 reasonably promptly deliver the Shares as to which such Option was exercised to the Participant
(or to the Participant’s Survivors, as the case may be). In determining what constitutes “reasonably promptly,” it is expressly understood that the issuance and delivery of the Shares may be delayed by the Company in order to comply
with any law or regulation (including, without limitation, state securities or “blue sky” laws) which 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.	PAYMENT IN CONNECTION WITH THE ISSUANCE OF STOCK GRANTS AND STOCK-BASED AWARDS AND ISSUE OF SHARES. 


Any Stock Grant or Stock-Based Award requiring payment of a purchase price for the Shares as to which such Stock Grant or Stock-Based
Award is being granted shall be made (a) in United States dollars in cash or by check, or (b) at the discretion of the Administrator, through delivery of shares of Common Stock held for at least six months (if required to avoid negative
accounting treatment) and having a Fair Market Value equal as of the date of payment to the purchase price of the Stock Grant or Stock-Based Award, or (c) at the discretion of the Administrator, by any combination of (a) and
(b) above; or (d) at the discretion of the Administrator, by payment of such other lawful consideration as the Administrator may determine. 
 The Company shall when required by the applicable Agreement, reasonably promptly deliver the Shares as to which such Stock Grant or Stock-Based Award was made to the Participant (or to the
Participant’s Survivors, as the case may be), subject to any escrow provision set forth in the applicable Agreement. In determining what constitutes “reasonably promptly,” it is expressly understood that the issuance and delivery of
the Shares may be delayed by the Company in order to comply with any law or regulation (including, without limitation, state securities or “blue sky” laws) which requires the Company to take any action with respect to the Shares prior to
their issuance. 

  
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	 	11.	RIGHTS AS A SHAREHOLDER. 


No Participant to whom a Stock Right has been granted shall have rights as a shareholder with respect to any Shares covered by such Stock
Right except after due exercise of an Option or issuance of Shares as set forth in any Agreement, tender of the aggregate exercise or purchase price, if any, for the Shares being purchased and registration of the Shares in the Company’s share
register in the name of the Participant. 
  

	 	12.	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 (i) by will or by the laws of descent and distribution, or (ii) as approved by the
Administrator in its discretion and set forth in the applicable Agreement provided that no Stock Right may be transferred by a Participant for value. Notwithstanding the foregoing, an ISO transferred except in compliance with clause (i) above
shall no longer qualify as an ISO. The designation of a beneficiary of a Stock Right by a Participant, with the prior approval of the Administrator and in such form as the Administrator shall prescribe, shall not be deemed a transfer prohibited by
this Paragraph. Except as provided above during the Participant’s lifetime a Stock Right shall only be exercisable by or issued to such Participant (or 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. 
  

	 	13.	EFFECT ON OPTIONS OF TERMINATION OF SERVICE OTHER THAN FOR CAUSE OR DEATH OR DISABILITY. 


Except as otherwise provided in a Participant’s Option Agreement, in the event of a termination of service (whether as an Employee,
director or Consultant) with the Company or an Affiliate before the Participant has exercised an Option, the following rules apply: 
 (a) A Participant who ceases to be an Employee, director or Consultant of the Company or of an Affiliate (for any reason other than termination for Cause, Disability, or death for which events there are
special rules in Paragraphs 14, 15, and 16, respectively), may exercise any Option granted to him or her to the extent that the Option is exercisable on the date of such termination of service, but only within such term as the Administrator has
designated in a Participant’s Option Agreement. 
 (b) Except as provided in Subparagraph (c) below, or Paragraph 15
or 16, in no event may an Option intended to be an ISO, be exercised later than three months after the Participant’s termination of employment. 
 (c) The provisions of this Paragraph, and not the provisions of Paragraph 15 or 16, shall apply to a Participant who subsequently becomes Disabled or dies after the termination of employment, director
status or consultancy; provided, however, in the case of a Participant’s Disability or death within three months after the termination of employment, director status or consultancy, the Participant or the Participant’s Survivors may
exercise the Option within one year after the date of the Participant’s termination of service, but in no event after the date of expiration of the term of the Option. 

  
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 (d) Notwithstanding anything herein to the contrary, if subsequent to a Participant’s
termination of employment, termination of director status or termination of consultancy, but prior to the exercise of an Option, the Administrator determines that, either prior or subsequent to the Participant’s termination, the Participant
engaged in conduct which would constitute Cause, then such Participant shall forthwith cease to have any right to exercise any Option. 
 (e) A Participant to whom an Option has been granted under the Plan who is absent from the Company or an Affiliate because of temporary disability (any disability other than a Disability as defined in
Paragraph 1 hereof), or who is on leave of absence for any purpose, shall not, during the period of any such absence, be deemed, by virtue of such absence alone, to have terminated such Participant’s employment, director status or consultancy
with the Company or with an Affiliate, except as the Administrator may otherwise expressly provide; provided, however, that, for ISOs, any leave of absence granted by the Administrator of greater than ninety days, unless pursuant to a contract or
statute that guarantees the right to reemployment, shall cause such ISO to become a Non-Qualified Option on the
181st day following such leave of absence. 

(f) Except as required by law or as set forth in a Participant’s Option Agreement, Options 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 or Consultant of the Company or any Affiliate. 

 

	 	14.	EFFECT ON OPTIONS OF TERMINATION OF SERVICE FOR CAUSE. 

 Except as otherwise provided in a Participant’s Option Agreement, the following rules apply if the Participant’s service (whether as an Employee, director or Consultant) with the Company or an
Affiliate is terminated for Cause prior to the time that all his or her outstanding Options have been exercised: 
 (a) All
outstanding and unexercised Options as of the time the Participant is notified his or her service is terminated for Cause will immediately be forfeited. 
 (b) Cause is not limited to events which 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.
If the Administrator determines, subsequent to a Participant’s termination of service but prior to the exercise of an Option, that either prior or subsequent to the Participant’s termination the Participant engaged in conduct which would
constitute Cause, then the right to exercise any Option is forfeited. 

  
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	 	15.	EFFECT ON OPTIONS OF TERMINATION OF SERVICE FOR DISABILITY. 

 Except as otherwise provided in a Participant’s Option Agreement: 
 (a) A
Participant who ceases to be an Employee, director or Consultant of the Company or of an Affiliate by reason of Disability may exercise any Option granted to such Participant: 

 

	 	(i)	To the extent that the Option has become exercisable but has not been exercised on the date of the Participant’s termination of service due to Disability; and


  

	 	(ii)	In the event rights to exercise the Option accrue periodically, to the extent of a pro rata portion through the date of the Participant’s termination of service
due to Disability of any additional vesting rights that would have accrued on the next vesting date had the Participant not become Disabled. The proration shall be based upon the number of days accrued in the current vesting period prior to the date
of the Participant’s termination of service due to Disability. 

 (b) A Disabled Participant may exercise the
Option only within the period ending one year after the date of the Participant’s termination of service due to Disability, notwithstanding that the Participant might have been able to exercise the Option as to some or all of the Shares on a
later date if the Participant had not been terminated due to Disability and had continued to be an Employee, director or Consultant or, if earlier, within the originally prescribed term of the Option. 

(c) The Administrator shall make the determination both of whether Disability has occurred and the date of its occurrence (unless a
procedure for such determination is set forth in another agreement between the Company and such Participant, in which case such procedure shall be used for such determination). If requested, the Participant shall be examined by a physician selected
or approved by the Administrator, the cost of which examination shall be paid for by the Company. 
  

	 	16.	EFFECT ON OPTIONS OF DEATH WHILE AN EMPLOYEE, DIRECTOR OR CONSULTANT. 

 Except as otherwise provided in a Participant’s Option Agreement: 
 (a) In
the event of the death of a Participant while the Participant is an Employee, director or Consultant of the Company or of an Affiliate, such Option may be exercised by the Participant’s Survivors: 

 

	 	(i)	To the extent that the Option has become exercisable but has not been exercised on the date of death; and 


 

	 	(ii)	In the event rights to exercise the Option accrue periodically, to the extent of a pro rata portion through the date of death of any additional vesting rights that
would have accrued on the next vesting date had the Participant not died. The proration shall be based upon the number of days accrued in the current vesting period prior to the Participant’s date of death. 


  
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 (b) If the Participant’s Survivors wish to exercise the Option, they must take all
necessary steps to exercise the Option within one year after the date of death of such Participant, notwithstanding that the decedent might have been able to exercise the Option 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, director or Consultant or, if earlier, within the originally prescribed term of the Option. 
  

	 	17.	EFFECT OF TERMINATION OF SERVICE ON STOCK GRANTS AND STOCK-BASED AWARDS. 

 In the event of a termination of service (whether as an Employee, director or Consultant) with the Company or an Affiliate for any reason before the Participant has accepted a Stock Grant or a Stock-Based
Award and paid the purchase price, if required, such grant shall terminate. 
 For purposes of this Paragraph 17 and Paragraph
18 below, a Participant to whom a Stock Grant has been issued under the Plan who is absent from work with the Company or with an Affiliate because of temporary disability (any disability other than a Disability as defined in Paragraph 1 hereof), or
who is on leave of absence for any purpose, shall not, during the period of any such absence, be deemed, by virtue of such absence alone, to have terminated such Participant’s employment, director status or consultancy with the Company or with
an Affiliate, except as the Administrator may otherwise expressly provide. 
 In addition, for purposes of this Paragraph 17 and
Paragraph 18 below, any change of employment or other service within or among the Company and any Affiliates shall not be treated as a termination of employment, director status or consultancy so long as the Participant continues to be an Employee,
director or Consultant of the Company or any Affiliate. 
  

	 	18.	EFFECT ON STOCK GRANTS OF TERMINATION OF SERVICE OTHER THAN FOR CAUSE OR DEATH OR DISABILITY. 


Except as otherwise provided in a Participant’s Stock Grant Agreement, in the event of a termination of service (whether as an
Employee, director or Consultant), other than termination for Cause, Disability, or death for which events there are special rules in Paragraphs 19, 20, and 21, respectively, before all forfeiture provisions or Company rights of repurchase shall
have lapsed, then the Company shall have the right to cancel or repurchase that number of Shares subject to a Stock Grant as to which the Company’s forfeiture or repurchase rights have not lapsed. 

 

	 	19.	EFFECT ON STOCK GRANTS OF TERMINATION OF SERVICE FOR CAUSE. 

 Except as otherwise provided in a Participant’s Stock Grant Agreement, the following rules apply if the Participant’s service (whether as an Employee, director or Consultant) with the Company or
an Affiliate is terminated for Cause: 
 (a) All Shares subject to any Stock Grant that remain subject to forfeiture provisions
or as to which the Company shall have a repurchase right shall be immediately forfeited to the Company as of the time the Participant is notified his or her service is terminated for Cause at the lesser of Fair Market Value or the purchase price,
thereof. 

  
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 (b) Cause is not limited to events which 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. If the Administrator determines, subsequent to a Participant’s termination of service, that either prior or subsequent to the
Participant’s termination the Participant engaged in conduct which would constitute Cause, then all Shares subject to any Stock Grant that remained subject to forfeiture provisions or as to which the Company had a repurchase right on the date
of termination shall be immediately forfeited to the Company. 
  

	 	20.	EFFECT ON STOCK GRANTS OF TERMINATION OF SERVICE FOR DISABILITY. 

 Except as otherwise provided in a Participant’s Stock Grant Agreement, the following rules apply if a Participant ceases to be an Employee, director or Consultant of the Company or of an Affiliate by
reason of Disability: to the extent the forfeiture provisions or the Company’s rights of repurchase have not lapsed on the date of Disability, they shall be exercisable; provided, however, that in the event such forfeiture provisions or rights
of repurchase lapse periodically, such provisions or rights shall lapse to the extent of a pro rata portion of the Shares subject to such Stock Grant through the date of Disability as would have lapsed had the Participant not become Disabled. The
proration shall be based upon the number of days accrued prior to the date of Disability. 
 The Administrator shall make the
determination both as to whether Disability has occurred and the date of its occurrence (unless a procedure for such determination is set forth in another agreement between the Company and such Participant, in which case such procedure shall be used
for such determination). If requested, the Participant shall be examined by a physician selected or approved by the Administrator, the cost of which examination shall be paid for by the Company. 

 

	 	21.	EFFECT ON STOCK GRANTS OF DEATH WHILE AN EMPLOYEE, DIRECTOR OR CONSULTANT. 

 Except as otherwise provided in a Participant’s Stock Grant Agreement, the following rules apply in the event of the death of a Participant while the Participant is an Employee, director or
Consultant of the Company or of an Affiliate: to the extent the forfeiture provisions or the Company’s rights of repurchase have not lapsed on the date of death, they shall be exercisable; provided, however, that in the event such forfeiture
provisions or rights of repurchase lapse periodically, such provisions or rights shall lapse to the extent of a pro rata portion of the Shares subject to such Stock Grant through the date of death as would have lapsed had the Participant not died.
The proration shall be based upon the number of days accrued prior to the Participant’s date of death. 

  
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	 	22.	PURCHASE FOR INVESTMENT. 


Unless the offering and sale of the Shares shall have been effectively registered under the Securities Act, the Company shall be under no
obligation to issue Shares under the Plan unless and until the following conditions have been fulfilled: 
 (a) The person who
receives a Stock Right shall warrant to the Company, prior to the receipt of Shares, that such person is acquiring such Shares for his or her own account, for investment, and not with a view to, or for sale in connection with, the distribution of
any such Shares, in which event the person acquiring such Shares shall be bound by the provisions of the following legend (or a legend in substantially similar form) which shall be endorsed upon the certificate evidencing the Shares issued pursuant
to such exercise or such grant: 
 “The shares represented by this certificate have been taken for investment and they may
not be sold or otherwise transferred by any person, including a pledgee, unless (1) either (a) a Registration Statement with respect to such shares shall be effective under the Securities Act of 1933, as amended, or (b) the Company
shall have received an opinion of counsel satisfactory to it that an exemption from registration under such Act is then available, and (2) there shall have been compliance with all applicable state securities laws.” 

(b) At the discretion of the Administrator, the Company shall have received an opinion of its counsel that the Shares may be issued in
compliance with the Securities Act without registration thereunder. 
  

	 	23.	DISSOLUTION OR LIQUIDATION OF THE COMPANY. 

 Upon the dissolution or liquidation of the Company, all Options granted under this Plan which as of such date shall not have been exercised and all Stock Grants and Stock-Based Awards which have not been
accepted, to the extent required under the applicable Agreement, will terminate and become null and void; provided, however, that if the rights of a Participant or a Participant’s Survivors have not otherwise terminated and expired, the
Participant or the Participant’s Survivors will have the right immediately prior to such dissolution or liquidation to exercise or accept any Stock Right to the extent that the Stock Right is exercisable or subject to acceptance 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 Agreement. 
  

	 	24.	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 shall be adjusted as hereinafter provided, unless otherwise specifically provided in a Participant’s
Agreement: 
 (a) Stock Dividends and Stock Splits. If (i) 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, or (ii) additional shares or new or different shares or other securities of the
Company or other non-

  
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cash assets are distributed with respect to such shares of Common Stock, each Stock Right and the number of shares of Common Stock deliverable thereunder shall be appropriately increased or
decreased proportionately, and appropriate adjustments shall be made including, in the exercise or purchase price per share, to reflect such events. The number of Shares subject to the limitations in Paragraph 3(a) and 4(c) shall also be
proportionately adjusted upon the occurrence of such events. 
 (b) Corporate Transactions. If the Company is to be
consolidated with or acquired by another entity in a merger, consolidation, or sale of all or substantially all of the Company’s assets other than a transaction to merely change the state of incorporation (a “Corporate Transaction”),
the Administrator or the board of directors of any entity assuming the obligations of the Company hereunder (the “Successor Board”), shall, as to outstanding Options, either (i) make appropriate provision for the continuation of such
Options by substituting on an equitable basis for the Shares then subject to such Options either the consideration payable with respect to the outstanding shares of Common Stock in connection with the Corporate Transaction or securities of any
successor or acquiring entity; or (ii) upon written notice to the Participants, provide that such Options must be exercised (either (A) to the extent then exercisable or, (B) at the discretion of the Administrator, any such Options
being made partially or fully exercisable for purposes of this Subparagraph), within a specified number of days of the date of such notice, at the end of which period such Options which have not been exercised shall terminate; or
(iii) terminate such Options in exchange for payment of an amount equal to the consideration payable upon consummation of such Corporate Transaction to a holder of the number of shares of Common Stock into which such Option would have been
exercisable (either (A) to the extent then exercisable or, (B) at the discretion of the Administrator, any such Options being made partially or fully exercisable for purposes of this Subparagraph) less the aggregate exercise price
thereof. For purposes of determining the payments to be made pursuant to Subclause (iii) above, in the case of a Corporate Transaction the consideration for which, in whole or in part, is other than cash, the consideration other than cash shall
be valued at the fair value thereof as determined in good faith by the Board of Directors. 
 With respect to outstanding Stock
Grants, the Administrator or the Successor Board, shall make appropriate provision for the continuation of such Stock Grants on the same terms and conditions by substituting on an equitable basis for the Shares then subject to such Stock Grants
either the consideration payable with respect to the outstanding Shares of Common Stock in connection with the Corporate Transaction or securities of any successor or acquiring entity. In lieu of the foregoing, in connection with any Corporate
Transaction, the Administrator may provide that, upon consummation of the Corporate Transaction, each outstanding Stock Grant shall be terminated in exchange for payment of an amount equal to the consideration payable upon consummation of such
Corporate Transaction to a holder of the number of shares of Common Stock comprising such Stock Grant (to the extent such Stock Grant is no longer subject to any forfeiture or repurchase rights then in effect or, at the discretion of the
Administrator, all forfeiture and repurchase rights being waived upon such Corporate Transaction). 
 In taking any of the
actions permitted under this Paragraph 24(b), the Administrator shall not be obligated by the Plan to treat all Stock Rights, all Stock Rights held by a Participant, or all Stock Rights of the same type, identically. 

  
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 (c) Recapitalization or Reorganization. In the event of a recapitalization or
reorganization of the Company other than a Corporate Transaction 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 an Option or
accepting a Stock Grant after the recapitalization or reorganization shall be entitled to receive for the price paid upon such exercise or acceptance if any, the number of replacement securities which would have been received if such Option had been
exercised or Stock Grant accepted prior to such recapitalization or reorganization. 
 (d) Adjustments to Stock-Based
Awards. Upon the happening of any of the events described in Subparagraphs (a), (b) or (c) above, any outstanding Stock-Based Award shall be appropriately adjusted to reflect the events described in such Subparagraphs. The
Administrator or the Successor Board shall determine the specific adjustments to be made under this Paragraph 24, including, but not limited to the effect of any Corporate Transaction and, subject to Paragraph 4, its determination shall be
conclusive. 
 (e) Modification of Options. Notwithstanding the foregoing, any adjustments made pursuant to Subparagraph
(a), (b) or (c) above with respect to Options shall be made only after the Administrator determines whether such adjustments would (i) constitute a “modification” of any ISOs (as that term is defined in Section 424(h)
of the Code) or (ii) cause any adverse tax consequences for the holders of Options, including, but not limited to, pursuant to Section 409A of the Code. If the Administrator determines that such adjustments made with respect to Options
would constitute a modification or other adverse tax consequence, it may refrain from making such adjustments, unless the holder of an Option specifically agrees 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 Option. This paragraph shall not apply to the acceleration of the vesting of any ISO that would cause any portion of the ISO
to violate the annual vesting limitation contained in Section 422(d) of the Code, as described in Paragraph 6(b)(iv). 
  

	 	25.	ISSUANCES OF SECURITIES. 


Except as expressly provided herein, no issuance 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 prior to any issuance of Shares pursuant to a Stock Right. 
  

	 	26.	FRACTIONAL SHARES. 

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

  
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	 	27.	CONVERSION OF ISOs INTO NON-QUALIFIED OPTIONS; TERMINATION OF ISOs. 

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

 

	 	28.	WITHHOLDING. 

 In the
event that any federal, state, or local income taxes, employment taxes, Federal Insurance Contributions Act (“F.I.C.A.”) 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 issuance of a Stock Right or Shares under the Plan or for any other reason required by law, the Company may withhold from the Participant’s 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 statutory minimum amount of such withholdings unless a different withholding arrangement, including
the use of shares of the Company’s Common Stock or a promissory note, is authorized by the Administrator (and permitted by law). For purposes hereof, the fair market value of the shares withheld for purposes of payroll withholding shall be
determined in the manner set forth under the definition of Fair Market Value provided in Paragraph 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. 
  

	 	29.	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 defined in Section 424(c) of the Code and includes any disposition (including any sale or gift) of such Shares before the later of (a) two years after the date the Employee was granted the ISO, or (b) one
year after the date the Employee acquired Shares by exercising the ISO, except as otherwise provided in Section 424(c) of the Code. If the Employee has died before such Shares are sold, these holding period requirements do not apply and no
Disqualifying Disposition can occur thereafter. 

  
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	 	30.	TERMINATION OF THE PLAN. 


The Plan will terminate on November 11, 2021, the date which is ten years from the earlier of the date of its adoption by the Board
of Directors and the date of its approval by the shareholders of the Company. The Plan may be terminated at an earlier date by vote of the shareholders or the Board of Directors of the Company; provided, however, that any such earlier termination
shall not affect any Agreements executed prior to the effective date of such termination. Termination of the Plan shall not affect any Stock Rights theretofore granted. 

 

	 	31.	AMENDMENT OF THE PLAN AND AGREEMENTS. 

 The Plan may be amended by the shareholders of the Company. The Plan may also be amended by 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 as may be afforded incentive stock options under Section 422 of the Code (including deferral of taxation upon exercise),
and to the extent necessary to qualify the Shares issuable 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
which the Administrator determines is of a scope that requires shareholder approval shall be subject to obtaining such shareholder approval. Any modification or amendment of the Plan shall not, without the consent of a Participant, adversely affect
his or her rights under a Stock Right previously granted to him or her. With the consent of the Participant affected, the Administrator may amend outstanding Agreements in a manner which may be adverse to the Participant but which is not
inconsistent with the Plan. In the discretion of the Administrator, outstanding Agreements may be amended by the Administrator in a manner which is not adverse to the Participant. 

 

	 	32.	EMPLOYMENT OR OTHER RELATIONSHIP. 

 Nothing in this Plan or any Agreement shall be deemed to prevent the Company or an Affiliate from terminating the employment, consultancy or director status of a Participant, nor 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. 

 

	 	33.	GOVERNING LAW. 

 This Plan
shall be construed and enforced in accordance with the law of the State of Delaware. 

  
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