Document:

EX-10.4.2

 Exhibit 10.4.2 

NEXIMMUNE, INC. 
 2021
EQUITY INCENTIVE PLAN 
 STOCK OPTION AWARD AGREEMENT 

Pursuant to your Stock Option Grant Notice (“Grant Notice”) and this Option Agreement, NexImmune, Inc., a Delaware
corporation (the “Company”) has granted you an option under its 2021 Equity Incentive Plan (the “Plan”) to purchase the number of shares of the Company’s Common Stock indicated in your Grant
Notice at the exercise price indicated in your Grant Notice. Defined terms not explicitly defined in this Option Agreement but defined in the Plan will have the same definitions as in the Plan. 

The details of your option are as follows: 

1. VESTING. Subject to the limitations contained in this Option Agreement, your option will vest as provided in
your Grant Notice, provided that vesting will cease upon the termination of your Continuous Service. 
 2. NUMBER
OF SHARES AND EXERCISE PRICE. The number of shares of Common Stock subject to your option and your exercise price per share referenced in your Grant Notice may be
adjusted from time to time for Capitalization Adjustments. 
 3. EXERCISE RESTRICTION FOR
NON-EXEMPT EMPLOYEES. In the event that you are an Employee eligible for overtime compensation under the Fair Labor Standards Act of 1938, as amended (i.e., a “Non-Exempt Employee”), you may not exercise your option until you have completed at least six (6) months of Continuous Service measured from the Date of Grant specified in your Grant Notice,
notwithstanding any other provision of your option. 
 4. EXERCISE PRIOR TO
VESTING (“EARLY EXERCISE”). If permitted in your Grant Notice (i.e., the “Exercise
Schedule” indicates “Early Exercise Permitted”) and subject to the provisions of your option, you may elect at any time that is both (i) during the period of your Continuous Service and (ii) during the term of your option,
to exercise all or part of your option, including the unvested portion of your option; provided, however, that: 
 (a) a
partial exercise of your option will be deemed to cover first vested shares of Common Stock and then the earliest vesting installment of unvested shares of Common Stock; 

(b) any shares of Common Stock so purchased from installments that have not vested as of the date of exercise will be subject to the
purchase option in favor of the Company as described in the Company’s form of Early Exercise Stock Purchase Agreement; 
 (c) you
will enter into the Company’s form of Early Exercise Stock Purchase Agreement with a vesting schedule that will result in the same vesting as if no early exercise had occurred; and 

(d) if your option is an Incentive Stock Option, then, to the extent that the aggregate Fair Market Value (determined at the time of
grant) of the shares of Common Stock with respect to which your option plus all other Incentive Stock Options you hold are exercisable for the first time by you during any calendar year (under all plans of the Company and its Affiliates) exceeds one
hundred thousand dollars ($100,000), your option(s) or portions thereof that exceed such limit (according to the order in which they were granted) will be treated as Nonstatutory Stock Options. 

  
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 5. METHOD OF PAYMENT. Payment of the
exercise price is due in full upon exercise of all or any part of your option. You may elect to make payment of the exercise price in cash or by check or in any other manner permitted by your Grant Notice, which may include one
or more of the following: 
 (a) Provided that at the time of exercise the Common Stock is publicly traded and quoted regularly in
The Wall Street Journal, pursuant to a program developed under Regulation T as promulgated by the Federal Reserve Board that, prior to the issuance of Common Stock, results in either the receipt of cash (or check) by the Company or the
receipt of irrevocable instructions to pay the aggregate exercise price to the Company from the sales proceeds. 
 (b) Provided that
at the time of exercise the Common Stock is publicly traded and quoted regularly in The Wall Street Journal, by delivery to the Company (either by actual delivery or attestation) of already-owned shares of Common Stock that are owned free and
clear of any liens, claims, encumbrances or security interests, and that are valued at Fair Market Value on the date of exercise. Notwithstanding the foregoing, you may not exercise your option by tender to the Company of Common Stock to the extent
such tender would violate the provisions of any law, regulation or agreement restricting the redemption of the Company’s stock. 
 6.
WHOLE SHARES. You may exercise your option only for whole shares of Common Stock. 
 7.
SECURITIES LAW COMPLIANCE. Notwithstanding anything to the contrary contained in this Option Agreement, you may not exercise your option unless the shares of Common Stock issuable upon such
exercise are then registered under the Securities Act or, if such shares of Common Stock are not then so registered, the Company has determined that such exercise and issuance would be exempt from the registration requirements of the Securities Act.
The exercise of your option also must comply with other applicable laws and regulations governing your option, and you may not exercise your option if the Company determines that such exercise would not be in material compliance with such laws and
regulations. 
 8. TERM. You may not exercise your option before the commencement or after the expiration of
its term. The term of your option commences on the Date of Grant and expires upon the earliest of the following: 
 (a) immediately
upon the termination of your Continuous Service for Cause; 
 (b) three (3) months after the termination of your Continuous
Service for any reason other than Cause or your Disability or death, provided that if during any part of such three (3) month period your option is not exercisable solely because of the condition set forth in the section above relating to
“Securities Law Compliance,” your option will not expire until the earlier of the Expiration Date or until it will have been exercisable for an aggregate period of three (3) months after the termination of your Continuous Service;

  
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 (c) twelve (12) months after the termination of your Continuous Service due to
your Disability; 
 (d) twelve (12) months after your death if you die either during your Continuous Service or within three
(3) months after your Continuous Service terminates; 
 (e) the Expiration Date indicated in your Grant Notice; and 

(f) the day before the tenth (10th) anniversary of the Date of Grant. 

If your option is an Incentive Stock Option, note that to obtain the federal income tax advantages associated with an Incentive Stock Option,
the Code requires that at all times beginning on the date of grant of your option and ending on the day three (3) months before the date of your option’s exercise, you must be an employee of the Company or an Affiliate, except in the event
of your death or your permanent and total disability, as defined in Section 22(e)(3) of the Code. (The definition of disability in Section 22(e)(3) of the Code is different from the definition of the Disability under the Plan). The Company
has provided for extended exercisability of your option under certain circumstances for your benefit but cannot guarantee that your option will necessarily be treated as an Incentive Stock Option if you continue to provide services to the Company or
an Affiliate as a Consultant or Director after your employment terminates or if you otherwise exercise your option more than three (3) months after the date your employment with the Company or an Affiliate terminates. 

9. EXERCISE. 

(a) You may exercise the vested portion of your option (and the unvested portion of your option if your Grant Notice so permits) during
its term by delivering a Notice of Exercise (in a form designated by the Company) together with the exercise price to the Secretary of the Company, or to such other person as the Company may designate, during regular business hours, together with
such additional documents as the Company may then require. 
 (b) By exercising your option you agree that, as a condition to any
exercise of your option, the Company may require you to enter into an arrangement providing for the payment by you to the Company of any tax withholding obligation of the Company arising by reason of (1) the exercise of your option,
(2) the lapse of any substantial risk of forfeiture to which the shares of Common Stock are subject at the time of exercise, or (3) the disposition of shares of Common Stock acquired upon such exercise. 

(c) If your option is an Incentive Stock Option, by exercising your option you agree that you will notify the Company in writing within
fifteen (15) days after the date of any disposition of any of the shares of the Common Stock issued upon exercise of your option that occurs within two (2) years after the date of your option grant or within one (1) year after such
shares of Common Stock are transferred upon exercise of your option. 

  
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 (d) By exercising your option you agree that you will not sell, transfer, make any
short sale of, grant any option for the purchase of, or enter into any hedging or similar transaction with the same economic effect as a sale, any Common Stock (or other securities) of the Company held by you (i) during the 180-day period following the effective date of the Company’s first firm commitment underwritten public offering of the Common Stock registered under the Securities Act. (or such longer period, not to exceed 34
days after the expiration of the 180-day period, as the underwriters or the Company will request in order to facilitate compliance with NASD Rule 2711 or NYSE Member Rule 472 or any successor or similar rule
or regulation), and (ii) the 90-day period following the effective date of a registration statement of the Company filed under the Securities Act (or such longer period, not to exceed 34 days after the
expiration of the 90-day period, as the underwriters or the Company will request in order to facilitate compliance with NASD Rule 2711 or NYSE Member Rule 472 or any successor or similar rule or regulation,
the “Lock-Up Period”); provided, however, that nothing contained in this section will prevent the exercise of a repurchase option, if any, in favor of the Company during
the Lock-Up Period. You further agree to execute and deliver such other agreements as may be reasonably requested by the Company and/or the underwriter(s) that are consistent with the foregoing or that are
necessary to give further effect thereto. In order to enforce the foregoing covenant, the Company may impose stop-transfer instructions with respect to your shares of Common Stock until the end of such period. The underwriters of the Company’s
stock are intended third party beneficiaries of this Section 9(d) and will have the right, power and authority to enforce the provisions hereof as though they were a party hereto. 

10. TRANSFERABILITY. Your option is not transferable, except by will or by the laws of descent and distribution,
and is exercisable during your life only by you. Notwithstanding the foregoing, by delivering written notice to the Company, in a form satisfactory to the Company, you may designate a third party who, in the event of your death, will thereafter be
entitled to exercise your option. In addition, if permitted by the Company you may transfer your option to a trust if you are considered to be the sole beneficial owner (determined under Section 671 of the Code and applicable state law) while
the option is held in the trust, provided that you and the trustee enter into a transfer and other agreements required by the Company. 

11. PURCHASE FOR INVESTMENT. Unless the offering and sale of the Shares to be issued
upon the particular exercise of your option shall have been effectively registered under the Securities Act of 1933, as now in force or hereafter amended (the “1933 Act”), the Company shall be under no obligation to issue the Shares
covered by such exercise unless the Company has determined that such exercise and issuance would be exempt from the registration requirements of the 1933 Act and until the following conditions have been fulfilled: 

(a) The person(s) who exercise your option shall warrant to the Company, at the time of such exercise, that such person(s) are acquiring
such Shares for their own respective accounts, 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(s) acquiring such Shares shall be bound by the provisions of the
following legend which shall be endorsed upon any certificate(s) evidencing the Shares issued pursuant to such exercise: 
 “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;” and 

  
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 (b) If the Company so requires, the Company shall have received an opinion of its
counsel that the Shares may be issued upon such particular exercise in compliance with the 1933 Act without registration thereunder. Without limiting the generality of the foregoing, the Company may delay issuance of the Shares until completion of
any action or obtaining of any consent, which the Company deems necessary under any applicable law (including without limitation state securities or “blue sky” laws). 

12. RIGHT OF FIRST REFUSAL. Shares of Common Stock that you acquire upon
exercise of your option are subject to any right of first refusal that may be described in the Company’s bylaws in effect at such time the Company elects to exercise its right; provided, however, that if your option is an Incentive Stock
Option and the right of first refusal described in the Company’s bylaws in effect at the time the Company elects to exercise its right is more beneficial to you than the right of first refusal described in the Company’s bylaws on the Date
of Grant, then the right of first refusal described in the Company’s bylaws on the Date of Grant will apply. The Company’s right of first refusal will expire on the first date upon which any security of the Company is listed (or approved
for listing) upon notice of issuance on a national securities exchange or quotation system. 
 13. RIGHT OF
PURCHASE. The Company will have the right to repurchase all or any part of the shares of Common Stock received pursuant to the exercise of your option (a “Repurchase Right”) on the terms and
conditions below. 
 (a) The Company’s Repurchase Right will be exercisable only within the one hundred and eighty-one (181) day period following a Repurchase Event, or such longer period as may be required to avoid a charge to earnings for financial accounting purposes or as otherwise agreed to by the Company and
you (“Repurchase Period”). Each of the following events will constitute a “Repurchase Event:” 

(i) Termination of your Continuous Service for any reason or no reason, with or without cause, including death or Disability, in which
event the Repurchase Period will commence on the date of termination of your Continuous Service (or in the case of a post-termination exercise of this option, the date of such exercise). 

(ii) You, your legal representative, or other holder of shares of Common Stock acquired upon exercise of this option attempts to sell,
exchange, transfer, pledge, or otherwise dispose of any of the shares of Common Stock without compliance with the right of first refusal provisions contained in the Company’s bylaws, if applicable, in which event the Repurchase Period will
commence on the date the Company receives actual notice of such attempted sale, exchange, transfer, pledge or other disposition. 
 (iii)
The receivership, bankruptcy, or other creditor’s proceeding regarding you or the taking of any of the shares of Common Stock by legal process, such as a levy of execution, in which event the Repurchase Period will commence on the date the
Company receives actual notice of the commencement of pendency of the receivership, bankruptcy or other creditor’s proceeding or the date of such taking, as the case may be, and the Fair Market Value of the shares of Common Stock will be
determined as of the last day of the month preceding the month in which the proceeding involved commenced or the taking occurred. 

  
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 (b) The Company will not exercise its Repurchase Right for less than all of the
shares of Common Stock without your consent and will exercise its Repurchase Right only for cash or cancellation of purchase money indebtedness for the shares of Common Stock. 

(c) The repurchase price for vested shares of Common Stock will be equal to the Fair Market Value at the time of the Repurchase Event,
unless your Continuous Service with the Company terminates for Cause. If your Continuous Service with the Company terminates for Cause, the Company may repurchase the vested shares of Common Stock at a price equal to the lesser of the Fair Market
Value and your exercise price for such shares of Common Stock as indicated on the Option Grant Notice. The Company may repurchase unvested shares of Common Stock at a price equal to the lesser of the Fair Market Value and your exercise price for
such shares of Common Stock as indicated on the Option Grant Notice. 
 (d) If, from time to time, there is any dividend, split or
other change in the character or amount of any of the outstanding shares of Common Stock of the Company which are subject to the provisions of this option, then in such event any and all new, substituted or additional securities to which you are
entitled by reason of your ownership or the shares of Common Stock acquired upon exercise of this option will be immediately subject to this Repurchase Right with the same force and effect as the shares of Common Stock subject to this Repurchase
Right immediately before such event. 
 (e) To ensure that the shares of Common Stock subject to the Company’s Repurchase Right
will be available for repurchase, the Company may require you to deposit the certificate evidencing the shares of Common Stock that you purchase upon exercise of this option with an agent designated by the Company under the terms and conditions of
an escrow agreement approved by the Company. If the Company does not require such deposit as a condition of exercise of this option, the Company reserves the right at any time to require you to so deposit the certificate in escrow. As soon as
practicable after the expiration of this Repurchase Right, the agent will deliver to you the shares of Common Stock and any other property no longer subject to such restriction. In the event the shares of Common Stock and any other property held in
escrow are subject to the Company’s exercise of its Repurchase Right, the notices required to be given to you will be given to the escrow agent, and any payment required to be given to you will be given to the escrow agent. Within thirty
(30) days after payment by the Company for the shares of Common Stock, the escrow agent will deliver the shares of Common Stock that the Company has purchased to the Company and will deliver the payment received from the Company to you. 

(f) The restrictions and rights provided for in this Section 13 shall terminate on the first of the date the Company’s Common
Stock becomes listed or admitted to unlisted trading privileges on a national securities exchange. 
 14. OPTION
NOT A SERVICE CONTRACT. Your option is not an employment or service contract, and nothing in your option will be deemed to create in any way whatsoever any obligation on your
part to continue in the employ of the Company or an Affiliate, or of the Company or an Affiliate to continue your employment. In addition, nothing in your option will obligate the Company or an Affiliate, their respective stockholders, Boards of
Directors, Officers or Employees to continue any relationship that you might have as a Director or Consultant for the Company or an Affiliate. 

  
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 15. WITHHOLDING OBLIGATIONS. 

(a) At the time you exercise your option, in whole or in part, or at any time thereafter as requested by the Company, you hereby
authorize withholding from payroll and any other amounts payable to you, and otherwise agree to make adequate provision for (including by means of a “cashless exercise” pursuant to a program developed under Regulation T as promulgated by
the Federal Reserve Board to the extent permitted by the Company), any sums required to satisfy the federal, state, local and foreign tax withholding obligations of the Company or an Affiliate, if any, which arise in connection with the exercise of
your option. 
 (b) Upon your request and subject to approval by the Company, in its sole discretion, and compliance with any
applicable legal conditions or restrictions, the Company may withhold from fully vested shares of Common Stock otherwise issuable to you upon the exercise of your option a number of whole shares of Common Stock having a Fair Market Value, determined
by the Company as of the date of exercise, not in excess of the minimum amount of tax required to be withheld by law (or such lower amount as may be necessary to avoid classification of your option as a liability for financial accounting purposes).
If the date of determination of any tax withholding obligation is deferred to a date later than the date of exercise of your option, share withholding pursuant to the preceding sentence will not be permitted unless you make a proper and timely
election under Section 83(b) of the Code, covering the aggregate number of shares of Common Stock acquired upon such exercise with respect to which such determination is otherwise deferred, to accelerate the determination of such tax
withholding obligation to the date of exercise of your option. Notwithstanding the filing of such election, shares of Common Stock will be withheld solely from fully vested shares of Common Stock determined as of the date of exercise of your option
that are otherwise issuable to you upon such exercise. Any adverse consequences to you arising in connection with such share withholding procedure will be your sole responsibility. 

(c) You may not exercise your option unless the tax withholding obligations of the Company and/or any Affiliate are satisfied.
Accordingly, you may not be able to exercise your option when desired even though your option is vested, and the Company will have no obligation to issue a certificate for such shares of Common Stock or release such shares of Common Stock from any
escrow provided for in this Option Agreement unless such obligations are satisfied. 
 16. TAX CONSEQUENCES.
You hereby agree that the Company does not have a duty to design or administer the Plan or its other compensation programs in a manner that minimizes your tax liabilities. You will not make any claim against the Company, or any of its Officers,
Directors, Employees or Affiliates related to tax liabilities arising from your option or your other compensation. In particular, you acknowledge that this option is exempt from Section 409A of the Code only if the exercise price per share
specified in the Grant Notice is at least equal to the “fair market value” per share of the Common Stock on the Date of Grant and there is no other impermissible deferral of compensation associated with the option. Because the Common Stock
is not traded on an established securities market, the Fair Market Value is determined by the Board, perhaps in consultation with an independent valuation firm retained by the Company. You acknowledge that there is no guarantee that the Internal
Revenue Service will agree with the valuation as determined by the Board, and you will not make any claim against the Company, or any of its Officers, Directors, Employees or Affiliates in the event that the Internal Revenue Service asserts that the
valuation determined by the Board is less than the “fair market value” as subsequently determined by the Internal Revenue Service. 

  
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 17. NOTICES. Any notices provided for in your option or the Plan will
be given in writing and will be deemed effectively given upon receipt or, in the case of notices delivered by mail by the Company to you, five (5) days after deposit in the United States mail, postage prepaid, addressed to you at the
last address you provided to the Company. 
 18. GOVERNING PLAN DOCUMENT. Your option is
subject to all the provisions of the Plan, the provisions of which are hereby made a part of your option, and is further subject to all interpretations, amendments, rules and regulations, which may from time to time be promulgated and adopted
pursuant to the Plan. In the event of any conflict between the provisions of your option and those of the Plan, the provisions of the Plan will control. 

  
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 NEXIMMUNE, INC. 

2021 EQUITY INCENTIVE PLAN 

STOCK OPTION AWARD 

NOTICE OF EXERCISE 
 Date of
Exercise: _______________ 
 Ladies and Gentlemen: 

This constitutes notice under my stock option that I elect to purchase the number of shares for the price set forth below. 

 

			
	Type of option:	  	                              
		
	Stock option dated:	  	                              
		
	Number of shares as to which option is exercised:	  	                              
		
	Shares to be issued in name of:	  	                              
		
	Total exercise price:	  	$______________
		
	Cash payment delivered herewith:	  	$______________

 By this exercise, I agree (i) to provide such additional documents as you may require pursuant to
the terms of the NexImmune, Inc. Equity Incentive Plan (the “Plan”), (ii) to execute and deliver to the Company a joinder to that certain Stockholders’ Agreement (as defined in the Plan), as applicable; and (iii) for
Incentive Stock Options, to notify you in writing within fifteen (15) days after the date of any disposition of any of the shares of Common Stock issued upon exercise of my Option that occurs within two (2) years after the Grant Date of
this Option or within one (1) year after such Shares of Common Stock are issued to me upon exercise of this Option. 
 I am aware that
the shares I am acquiring have not been registered under the Securities Act of 1933, as amended (the “1933 Act”), or any state securities laws. I understand that the reliance by the Company on exemptions under the 1933 Act is
predicated in part upon the truth and accuracy of the statements by me in this Notice of Exercise. 
 I hereby represent and warrant that
(i) I have been furnished with all information which I deem necessary to evaluate the merits and risks of the purchase of the Shares; (ii) I have had the opportunity to ask questions concerning the Shares and the Company and all questions
posed have been answered to my satisfaction; (iii) I have been given the opportunity to obtain any additional information I deem necessary to verify the accuracy of any information obtained concerning the Shares and the Company; and (iv) I
have such knowledge and experience in financial and business matters that I am able to evaluate the merits and risks of purchasing the Shares and to make an informed investment decision relating thereto. 

I hereby represent and warrant that I am purchasing the Shares for my own personal account for investment and not with a view to the sale or
distribution of all or any part of the Shares. 

  
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 I understand that because the Shares have not been registered under the 1933 Act, I must
continue to bear the economic risk of the investment for an indefinite time and the Shares cannot be sold unless the Shares are subsequently registered under applicable federal and state securities laws or an exemption from such registration
requirements is available. 
 I agree that I will in no event sell or distribute or otherwise dispose of all or any part of the Shares
unless (i) there is an effective registration statement under the 1933 Act and applicable state securities laws covering any such transaction involving the Shares or (ii) the Company receives an opinion of my legal counsel (concurred in by
legal counsel for the Company) stating that such transaction is exempt from registration or the Company otherwise satisfies itself that such transaction is exempt from registration. 

I consent to the placing of a legend on my certificate for the Shares stating that the Shares have not been registered and setting forth the
restriction on transfer contemplated hereby and to the placing of a stop transfer order on the books of the Company and with any transfer agents against the Shares until the Shares may be legally resold or distributed without restriction. 

I understand that at the present time Rule 144 of the Securities and Exchange Commission (the “SEC”) may not be relied on for
the resale or distribution of the Shares by me. I understand that the Company has no obligation to me to register the sale of the Shares with the SEC and has not represented to me that it will register the sale of the Shares. 

I have considered the federal, state and local income tax implications of the exercise of my Option and the purchase and subsequent sale of
the Shares. 
 Very truly
yours,                                        
                             

  
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 Restricted Stock Unit No.________ 

NEXIMMUNE, INC. 
 2021
EQUITY INCENTIVE PLAN 
 RESTRICTED STOCK UNIT AWARD NOTICE 

NexImmune, Inc. (the “Company”), pursuant to its 2021 Equity Incentive Plan (the “Plan”), hereby grants to the Participant
an Award of Restricted Stock Units to receive the number of Shares of the Company’s Common Stock as set forth below. This Award is subject to all of the terms and conditions as set forth herein and in the Restricted Stock Unit Award Agreement
and the Plan, which are attached hereto and incorporated herein in their entirety. 
  

			
	Participant:	  	                                      
    
		
	Grant Date:	  	                                      
    
		
	Number of Shares Subject to Award:	  	                                      
    
		
	Exercise Price (Per Share):	  	$____________________
		
	 Total Exercise Price:
	  	                                    
      
		
	 Expiration Date:
	  	                                    
      

 Vesting of Award: This Restricted Stock Unit Award shall vest as follows provided the Participant
is an Employee, director or Consultant of the Company or of an Affiliate on the applicable vesting: 
  

			
	Number of Restricted Stock Units	  	Vesting Date

 Additional Terms/Acknowledgements: The undersigned Participant acknowledges receipt of this Restricted
Stock Unit Award Notice, the Restricted Stock Unit Award Agreement and the Plan. The Participant and the Option are bound by and subject to the terms of each of the Restricted Stock Unit Award Notice, the Restricted Stock Unit Award Agreement and
the Plan. The Participant further acknowledges that as of the Grant Date, this Restricted Stock Unit Award Notice, the Restricted Stock Unit Award Agreement and the Plan set forth the entire understanding between the Participant and the Company
regarding the Restricted Stock Units and the acquisition of Shares in the Company and supersede all prior oral and written agreements on that subject with the exception of options previously granted and delivered to Participant by the Company. 

[Signature Page Follows] 

			
	NEXIMMUNE, INC.	  	PARTICIPANT:
	By:                                     
                                         
 	  	                                      
                                         

	                                    Signature	  	                                Signature
	Title:                                     
                                       	  	Date:                                     
                                
	Date:                                     
                                       	  	

 ATTACHMENTS: Restricted Stock Unit Award Agreement and 2021 Equity Incentive Plan. 

  
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 NEXIMMUNE, INC. 

2021 EQUITY INCENTIVE PLAN 

RESTRICTED STOCK UNIT AWARD AGREEMENT 

Pursuant to your Restricted Stock Unit Award Notice (“Award Notice”) and this Restricted Stock Unit Award Agreement (this
“Agreement”), NexImmune, Inc., a Delaware corporation (the “Company”) has granted you a number of Restricted Stock Units (“RSUs”) under its 2021 Equity Incentive Plan (the “Plan”) to receive up to the number
of shares of the Company’s Common Stock indicated in your Award Notice. Defined terms not explicitly defined in this Agreement but defined in the Plan will have the same definitions as in the Plan. 

1. Grant of Award. The Company hereby grants to you an award for the number of RSUs set forth in the Restricted Stock Unit Award Notice
(the “Award”). Each RSU represents a contingent entitlement for you to receive one share of the Company’s Common Stock, on the terms and conditions and subject to all the limitations set forth herein and in the Plan, which is
incorporated herein by reference. The Participant acknowledges receipt of a copy of the Plan. 
 2. Vesting of Award. 

(a) Subject to the terms and conditions set forth in this Agreement and the Plan, the Award granted hereby shall vest as set forth in the Award
Notice and is subject to the other terms and conditions of this Agreement and the Plan. On each vesting date set forth in the Award Notice, you are entitled to receive such number of shares of Common Stock equivalent to the number of RSUs as set
forth in the Award Notice provided that the Participant is employed or providing services to the Company or an Affiliate on such vesting date. Such shares of Common Stock shall thereafter be delivered by the Company to the Participant within five
days of the applicable vesting date and in accordance with this Agreement and the Plan. 
 (b) Except as otherwise set forth in this
Agreement, if the Participant’s employment or services terminate prior to a vesting date set forth in the Award Notice, then as of the date on which the Participant’s employment or service terminates, all unvested RSUs shall immediately be
forfeited to the Company and this Agreement shall terminate and be of no further force or effect. 
 3. Prohibitions on Transfer and
Sale. This Award (including any additional RSUs received by the Participant as a result of stock dividends, stock splits or any other similar transaction affecting the Company’s securities without receipt of consideration) shall not be
transferable by the Participant otherwise than (a) by will or by the laws of descent and distribution, or (b) pursuant to a qualified domestic relations order as defined by the Internal Revenue Code or Title I of the Employee Retirement
Income Security Act or the rules thereunder. Except as provided in the previous sentence, the shares of Common Stock to be issued pursuant to this Agreement shall be issued, during the Participant’s lifetime, only to the Participant (or, in the
event of legal incapacity or incompetence, to the Participant’s guardian or representative). This Award 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 this Award or of any rights granted hereunder contrary to the provisions of this Section 3, or the levy of any attachment or
similar process upon this Award shall be null and void. 
 4. Adjustments. The Plan contains provisions covering the treatment of RSUs
and shares of Common Stock in a number of contingencies such as stock splits. Provisions in the Plan for adjustment with respect to this Award and the related provisions with respect to successors to the business of the Company are hereby made
applicable hereunder and are incorporated herein by reference. 

  
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 5. Securities Law Compliance. The Participant specifically acknowledges and agrees
that any sales of shares of Common Stock shall be made in accordance with the requirements of the Securities Act of 1933, as amended. The Company currently plans to file with the Securities and Exchange Commission a registration statement with
respect to the Common Stock to be granted hereunder and intends to maintain this registration statement but has no obligation to do so. Once effective, if the registration statement ceases to be effective for any reason, the Participant will not be
able to transfer or sell any of the shares of Common Stock issued to the Participant pursuant to this Agreement unless exemptions from registration or filings under applicable securities laws are available. Furthermore, despite registration,
applicable securities laws may restrict the ability of the Participant to sell his or her Common Stock, including due to the Participant’s affiliation with the Company. The Company shall not be obligated to either issue the Common Stock or
permit the resale of any shares of Common Stock if such issuance or resale would violate any applicable securities law, rule or regulation. 

6. Rights as a Stockholder. The Participant shall have no right as a stockholder, including voting and dividend rights, with respect to
the RSUs subject to this Agreement unless the RSUs vest and the Company delivers to the Participant a certificate evidencing the Participant’s ownership of shares of the Company’s Common Stock. 

7. Incorporation of the Plan. The Participant specifically understands and agrees that the RSUs and the shares of Common Stock to be
issued under the Plan will be issued to the Participant pursuant to the Plan, a copy of which Plan the Participant acknowledges he or she has read and understands and by which Plan he or she agrees to be bound. The provisions of the Plan are
incorporated herein by reference. 
 8. Tax Liability of the Participant and Payment of Taxes. The Participant acknowledges and agrees
that any income or other taxes due from the Participant with respect to this Award or the shares of Common Stock to be issued pursuant to this Agreement or otherwise sold shall be the Participant’s responsibility. Without limiting the
foregoing, the Participant agrees that if under applicable law the Participant will owe taxes at each vesting date on the portion of the Award then vested the Company shall be entitled to immediate payment from the Participant of the amount of any
tax or other amounts required to be withheld by the Company by applicable law or regulation. Any taxes or other amounts due shall be paid, at the option of the Administrator as follows: 

(a) The Company may reduce the number of shares of Common Stock to be issued to the Participant on the applicable vesting date in an amount
equal to the statutory minimum of the Participant’s total tax and other withholding obligations due and payable by the Company. Fractional shares will not be retained to satisfy any portion of the Company’s withholding obligation.
Accordingly, the Participant agrees that in the event that the amount of withholding required would result in a fraction of a share being owed, that amount will be satisfied by withholding the fractional amount from the Participant’s paycheck;

 (b) The Company may require the Participant to deposit with the Company an amount of cash equal to the amount determined by the Company to
be required to be withheld with respect to the statutory minimum amount of the Participant’s total tax and other withholding obligations due and payable by the Company or otherwise withholding from the Participant’s paycheck an amount
equal to such amounts due and payable by the Company. 

  
 4 

 (c) If the Company believes that the sale of shares can be made in compliance with
applicable securities laws, authorizing, at a time when the Participant is not in possession of material nonpublic information, the Company may permit the sale by the Participant on the applicable vesting date of such number of shares of Common
Stock as the Company instructs a registered broker to sell to satisfy the Company’s withholding obligation, after deduction of the broker’s commission, and the broker shall be required to remit to the Company the cash necessary in order
for the Company to satisfy its withholding obligation. To the extent the proceeds of such sale exceed the Company’s withholding obligation the Company agrees to pay such excess cash to the Participant as soon as practicable. In addition, if
such sale is not sufficient to pay the Company’s withholding obligation the Participant agrees to pay to the Company as soon as practicable, including through additional payroll withholding, the amount of any withholding obligation that is not
satisfied by the sale of shares of Common Stock. The Participant agrees to hold the Company and the broker harmless from all costs, damages or expenses relating to any such sale. The Participant acknowledges that the Company and the broker are under
no obligation to arrange for such sale at any particular price. In connection with such sale of shares of Common Stock, the Participant shall execute any such documents requested by the broker in order to effectuate the sale of shares of Common
Stock and payment of the withholding obligation to the Company. The Participant acknowledges that this paragraph is intended to comply with Section 10b5-1(c)(1(i)(B) under the Exchange Act. 

The Company shall not deliver any shares of Common Stock to the Participant until it is satisfied that all required withholdings have been
made. 
 9. Participant Acknowledgements and Authorizations. 

The Participant acknowledges the following: 

(a) The Company is not by the Plan or this Award obligated to continue the Participant as an employee, director or consultant of the Company or
an Affiliate. 
 (b) The Plan is discretionary in nature and may be suspended or terminated by the 

Company at any time. 
 (c) The
grant of this Award is considered a one-time benefit and does not create a contractual or other right to receive any other award under the Plan, benefits in lieu of awards or any other benefits in the future.

 (d) The Plan is a voluntary program of the Company and future awards, if any, will be at the sole discretion of the Company, including,
but not limited to, the timing of any grant, the amount of any award, vesting provisions and the purchase price, if any. 
 (e) The value of
this Award is an extraordinary item of compensation outside of the scope of the Participant’s employment or consulting contract, if any. As such the Award is not part of normal or expected compensation for purposes of calculating any severance,
resignation, redundancy, end of service payments, bonuses, long-service awards, pension or retirement benefits or similar payments. The future value of the shares of Common Stock is unknown and cannot be predicted with certainty. 

(f) The Participant (i) authorizes the Company and each Affiliate and any agent of the Company or any Affiliate administering the Plan or
providing Plan recordkeeping services, to disclose to the Company or any of its Affiliates such information and data as the Company or any such Affiliate shall request in order to facilitate the grant of the Award and the administration of the Plan;
and (ii) authorizes the Company and each Affiliate to store and transmit such information in electronic form for the purposes set forth in this Agreement. 

10. Notices. Any notices required or permitted by the terms of this Agreement or the Plan shall be given by recognized courier service,
facsimile, registered or certified mail, return receipt requested, addressed as follows: 

  
 5 

 If to the Company: 

9119 Gaither Rd 
 Gaithersburg, MD
20877 
 Attention: Scott Carmer, Chief Executive Officer 

If to the Participant at the address set forth in the Company’s records. 

Any such notice shall be deemed to have been given on the earliest of receipt, one business day following delivery by the sender to a recognized courier
service, or three business days following mailing by registered or certified mail. 
 11. Assignment and Successors. 

(a) This Agreement is personal to the Participant and without the prior written consent of the Company shall not be assignable by the
Participant otherwise than by will or the laws of descent and distribution. This Agreement shall inure to the benefit of and be enforceable by the Participant’s legal representatives. 

(b) This Agreement shall inure to the benefit of and be binding upon the Company and its successors and assigns. 

12. Governing Law. This Agreement shall be construed and enforced in accordance with the laws of the State of Delaware, without giving
effect to the conflict of law principles thereof. For the purpose of litigating any dispute that arises under this Agreement, whether at law or in equity, the parties hereby consent to exclusive jurisdiction in the state of Delaware and agree that
such litigation shall be conducted in the state courts in the District of Durham, North Carolina or the federal courts of the United States for the District of Durham, North Carolina. 

13. Severability. If any provision of this Agreement is held to be invalid or unenforceable by a court of competent jurisdiction, then
such provision or provisions shall be modified to the extent necessary to make such provision valid and enforceable, and to the extent that this is impossible, then such provision shall be deemed to be excised from this Agreement, and the validity,
legality and enforceability of the rest of this Agreement shall not be affected thereby. 
 14. Entire Agreement. This Agreement,
together with the Plan, constitutes the entire agreement and understanding between the parties hereto with respect to the subject matter hereof and supersedes all prior oral or written agreements and understandings relating to the subject matter
hereof. No statement, representation, warranty, covenant or agreement not expressly set forth in this Agreement shall affect or be used to interpret, change or restrict the express terms and provisions of this Agreement provided, however, in any
event, this Agreement shall be subject to and governed by the Plan. 
 15. Modifications and Amendments; Waivers and Consents. The
terms and provisions of this Agreement may be modified or amended as provided in the Plan. Except as provided in the Plan, the terms and provisions of this Agreement may be waived, or consent for the departure therefrom granted, only by written
document executed by the party entitled to the benefits of such terms or provisions. No such waiver or consent shall be deemed to be or shall constitute a waiver or consent with respect to any other terms or provisions of this Agreement, whether or
not similar. Each such waiver or consent shall be effective only in the specific instance and for the purpose for which it was given, and shall not constitute a continuing waiver or consent. 

  
 6 

 16. Section 409A. The Award of RSUs evidenced by this Agreement is
intended to be exempt from the nonqualified deferred compensation rules of Section 409A of the Code as a “short term deferral” (as that term is used in the final regulations and other guidance issued under Section 409A of the
Code, including Treasury Regulation Section 1.409A-1(b)(4)(i)), and shall be construed accordingly. 

17. Data Privacy. By entering into this Agreement, the Participant: (i) authorizes the Company and each Affiliate, and any agent of
the Company or any Affiliate administering the Plan or providing Plan recordkeeping services, to disclose to the Company or any of its Affiliates such information and data as the Company or any such Affiliate shall request in order to facilitate the
grant of options and the administration of the Plan; (ii) to the extent permitted by applicable law waives any data privacy rights he or she may have with respect to such information, and (iii) authorizes the Company and each Affiliate to
store and transmit such information in electronic form for the purposes set forth in this Agreement. 
 [REMAINDER OF PAGE INTENTIONALLY LEFT
BLANK] 

  
 7EX-10.5

 Exhibit 10.5 

EMPLOYMENT AGREEMENT 
 This Employment Agreement (this “Agreement”) is entered into as of February 3, 2021 (the “Effective Date”) by and between Scott Carmer (“Employee”) and
NexImmune, Inc. (“Company”). 
 WHEREAS, Employee currently serves as Company’s Chief Executive Officer
and Company and Employee desire that Employee continue to serve in such capacity pursuant to the terms and conditions set forth below. 
 NOW THEREFORE, in consideration of the mutual promises set forth herein, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereby
agree as follows: 
 1. Term. This Agreement shall relate to the services of Employee commencing as of the Effective
Date. This Agreement is terminable at-will; as such, this Agreement may be terminated by either party at any time, with or without Cause, subject to the terms and conditions set forth herein. 

2. Nature of Position. Employee shall render full-time professional services to Company in the capacity of its Chief Executive
Officer. Employee shall at all times to the best of his or her ability, perform all duties that may be required by virtue of his or her position, as set forth in Company’s by-laws or corporate policies. 

3. Compensation; Benefits. 
 A. Salary. As of the Effective Date, and for so long as Employee continues to serve as an employee of the Company, Employee shall be entitled to a salary of $530,000.00 annually (“Annual
Salary”), subject to adjustment for increase by the Board, which shall review Employee’s salary and performance on at least an annual basis. Employee’s salary shall be paid at regular intervals in accordance with Company’s
standard payroll practices. 
 B. Stock Options. In further consideration of Employee’s services rendered under
this Agreement, Company has previously granted Employee stock options pursuant to its stock incentive plan to purchase Common Stock of Company. Immediately prior to the date on which the Company’s Form S-1 becomes effective and the
Company’s Common Stock commences trading on the NASDAQ exchange, the Company will grant you an option award to purchase up to 5,297,597 shares of the Company’s Common Stock under the Company’s 2021 Equity Incentive Plan. The shares
subject to the Option will initially be unvested, with 25% of the shares becoming vested on the first anniversary of the grant date and with the remaining 75% of the shares vesting in equal monthly installments over the next 36 months on the monthly
anniversary of the grant date. 
 C. Bonus. Employee shall be entitled to receive an annual bonus for each calendar year
set by the Board in its sole discretion and based on such factors as the Board deems appropriate up to 50% of Employee’s then-current salary. Employee must be employed on the last day of the calendar year to earn and be paid the annual bonus,
with such bonus determined in good faith and paid when bonuses are otherwise paid to employees; provided, however, that a pro-rata portion of such bonus will be paid to Employee in the event Employee’s employment ends prior to the last day of a
calendar year due to Constructive Termination, death or disability. 

 D. Fringe Benefits. During the term of the agreement, Employee shall have the
right to the following fringe benefits: 
  

	 	i.	 Employee shall be eligible to participate in any incentive compensation plan, pension or profit-sharing plan, stock purchase or stock option
plan to the same extent as other similarly situated employees of the Company, subject to the terms of the applicable plan. 

  

	 	ii.	 Employee shall be entitled to participate in all health insurance, dental insurance, long-term disability insurance and other employee benefit
plans instituted by the Company from time to time on the same terms and conditions as other similarly situated employees of the Company, to the extent permitted by law and subject to the terms of the applicable plan. 

 

	 	iii.	 The benefits made available by the Company, and the rules, terms and conditions for participation in such benefit plans, may be changed by the
Company at any time and from time to time without advance notice. 

 4. Expense Reimbursement. Employee
shall be entitled to reimbursement of all reasonable and actual out-of-pocket expenses incurred by him or her in the performance of his or her services to the Company consistent with corporate policies, provided that the expenses are properly
accounted for. Any such reimbursement will be made to as soon as administratively feasible following submission of such documentation of such expense, but shall be made no later than the calendar year following the calendar year in which such
expense is incurred. 
 5. Severance Rights. 
 A. Severance Not in Connection with a Change in Control. In case of a Triggering Event that becomes effective other than during a Change in Control Period, and subject to the Release required under
Paragraph 6 becoming enforceable and irrevocable, Employee shall have the following severance rights: 
  

	 	i.	 Severance Payments. Company shall pay Employee’s then-current Base Salary for a period of 18 months from the Triggering Event,
which severance will be payable in accordance with the Company’s then current payroll practices. 

  

	 	ii.	 Health Care Coverage. Subject to Employee’s timely election of continuation coverage under COBRA, the Company shall reimburse
Employee the monthly premium payable to continue his and his eligible dependents’ participation in the Company’s group 

  
 2 

	 	
health plan (to the extent permitted under applicable law and the terms of such plan) which covers Employee (and Employee’s eligible dependents) for a period of eighteen (18) months,
provided that Employee is eligible and remains eligible for COBRA coverage; and provided, further, that in the event that Employee obtains other employment that offers group health benefits, such continuation of coverage by the Company shall
immediately cease. If the reimbursement of any COBRA premiums would violate the nondiscrimination rules or cause the reimbursement of claims to be taxable under the Patient Protection and Affordable Care Act of 2010, together with the Health Care
and Education Reconciliation Act of 2010 (collectively, the “Act”) or Section 105(h) of the Code, the Company paid premiums shall be treated as taxable payments and be subject to imputed income tax treatment to the extent necessary to
eliminate any discriminatory treatment or taxation under the Act or Section 105(h) of the Code. 

  

	 	iii.	 Vesting of Equity. Notwithstanding any provisions to the contrary contained in any stockholders agreement, option agreement, award
agreement or other agreement, immediately upon the Release becoming enforceable and no longer subject to revocation, all of Employee’s unvested options awarded prior to the Effective Date shall fully vest and become exercisable.

 B. Severance in Connection with a Change in Control. In case of a Triggering Event
that becomes effective during a Change in Control Period, and subject to the Release required under Paragraph 6 becoming enforceable and irrevocable, Employee shall have the following severance rights: 

 

	 	i.	 Severance Payments. Company shall pay Employee an amount equal to 1.5 times the sum of Employee’s then-current Base Salary and
Target Bonus, payable in 18 equal monthly installments following the Triggering Event. 

  

	 	ii.	 Health Care Coverage. Subject to Employee’s timely election of continuation coverage under COBRA, the Company shall reimburse
Employee the monthly premium payable to continue his and his eligible dependents’ participation in the Company’s group health plan (to the extent permitted under applicable law and the terms of such plan) which covers Employee (and
Employee’s eligible dependents) for a period of eighteen (18) months, provided that Employee is eligible and remains eligible for COBRA coverage; and provided, further, that in the event that Employee obtains other employment that offers group
health benefits, such continuation of coverage by the Company shall immediately cease. If the reimbursement of any COBRA premiums would violate the nondiscrimination rules or cause the reimbursement of

  
 3 

	 	
claims to be taxable under the Patient Protection and Affordable Care Act of 2010, together with the Health Care and Education Reconciliation Act of 2010 (collectively, the “Act”) or
Section 105(h) of the Code, the Company paid premiums shall be treated as taxable payments and be subject to imputed income tax treatment to the extent necessary to eliminate any discriminatory treatment or taxation under the Act or Section 105(h)
of the Code. 

  

	 	iii.	 Vesting of Equity. Notwithstanding any provisions to the contrary contained in any stockholders agreement, option agreement, award
agreement or other agreement, immediately upon the Release becoming enforceable and no longer subject to revocation, all of Employee’s unvested options then-outstanding shall fully vest and become exercisable. 

6. Release. The Company’s obligations under Paragraph 5 are expressly conditioned upon Employee’s execution (and
non-revocation) of a release of claims (the “Release”) in a form to be provided by the Company. The Release will carve out rights to indemnification and directors and officers liability insurance, if applicable, post-employment amounts due
pursuant to Paragraph 5 and vested benefits and vested equity. The Release must be effective and irrevocable on or prior to the 60th day following the termination of Employee’s employment, and any severance payable to Employee will be paid
pursuant to the Company’s regular payroll schedule commencing on the first payroll date following the effective date of the Release, provided that if the Release review period begins in one tax year and ends in a later tax year, the payment of
the severance will commence in the later tax year following the date the Release is effective and irrevocable. The first installment will include those payments that would have been made to Employee had the payments commenced on the first payroll
date following Employee’s termination of employment. 
 6. Termination on Employee’s Other than in Connection with
a Triggering Event. In the event of a termination of Employee’s employment with the Company due to death or disability, the Company’s termination of Employee’s employment with Cause or Employee’s resignation other than in
connection with a Constructive Termination, Employee (or, in the case of Employee’s death, Employee’s beneficiary or if no such person is designated, to Employee’s estate or personal representative) shall be entitled to payment of:
(i) all accrued and unpaid base salary and all accrued but unused vacation time for the then-current annual period; (ii) all unreimbursed business expenses incurred through the date of termination; and (iii) any bonus pursuant to Paragraph 3.C
earned prior to the date of Employee’s termination. Such benefits are payable in a lump sum within thirty (30) days after the date of Employee’s termination, or such earlier date as may be required by applicable law. 

7. Non-Disclosure and Assignment Agreement. Employee acknowledges and agrees that the Information, Inventions, Non-Competition and
Non-Solicitation Agreement previously executed by him in favor of Company, the terms of which are hereby incorporated by reference, remains in full force and effect. 

  
 4 

 8. Indemnification. Employee shall be entitled to indemnification, in accordance
with the applicable provisions of the Company’s Articles of Incorporation, the Company’s Bylaws and any Indemnification Agreement entered into by Employee and Company, against all expense, liability, and loss (including attorney’s
fees and settlement payments) which Employee may incur by reason of any action, suit or proceeding arising from or relating to the performance of Employee’s duties as an officer or director of the Company. 

9. Section 409A Compliance. 
 A. All in-kind benefits provided and expenses eligible for reimbursement under this Agreement shall be provided by the Company or incurred by Employee during the time periods set forth in this Agreement.
All reimbursements shall be paid as soon as administratively practicable, but in no event shall any reimbursement be paid after the last day of the taxable year following the taxable year in which the expense was incurred. The amount of in-kind
benefits provided or reimbursable expenses incurred in one taxable year shall not affect the in-kind benefits to be provided or the expenses eligible for reimbursement in any other taxable year. Such right to reimbursement or in-kind benefits is not
subject to liquidation or exchange for another benefit. 
 B. To the extent that any of the payments or benefits provided for
in Section 5 are deemed to constitute non-qualified deferred compensation benefits subject to Section 409A of the Code, the following interpretations apply to Paragraph 5: 
 (i) Any termination of Employee’s employment triggering payment of benefits under Paragraph 5 must constitute a “separation from service” under Section 409A(a)(2)(A)(i) of the Code and
Treas. Reg. §1.409A-1(h) before distribution of such benefits can commence. To the extent that the termination of Employee’s employment does not constitute a separation of service, any benefits payable under Paragraph 5 that constitute
deferred compensation under Section 409A of the Code shall be delayed until after the date of a subsequent event constituting a separation of service. 
 (ii) If Employee is a “specified employee” (as that term is used in Section 409A of the Code and regulations and other guidance issued thereunder) on the date his separation from service becomes
effective, any benefits payable under Paragraph 5 that constitute non-qualified deferred compensation under Section 409A of the Code shall be delayed until the earlier of (a) the business day following the six-month anniversary of the date his
separation from service becomes effective, and (b) the date of Employee’s death, but only to the extent necessary to avoid such penalties under Section 409A of the Code. On the earlier of (a) the business day following the six-month anniversary
of the date his separation from service becomes effective, and (b) Employee’s death, the Company shall pay Employee in a lump sum the aggregate value of the non-qualified deferred compensation that the Company otherwise would have paid Employee
prior to that date under Paragraph 5 of this Agreement. 
 (iii) It is intended that each installment of the payments and
benefits provided under Paragraph 5 of this Agreement shall be treated as a separate “payment” for purposes of Section 409A of the Code. In particular, the installment severance payments set forth in Paragraph 5(a)(i) and 5(b)(i) of this
Agreement shall be divided into two portions. That number of installments commencing on the first payment date set forth in Paragraph 5(a)(i) or 

  
 5 

 
5(b)(i) of this Agreement that are in the aggregate less than two times the applicable compensation limit under Section 401(a)(17) of the Code for the year in which Employee’s separation
from service occurs shall be payable in accordance with Treas. Reg. §1.409A-1(b)(9)(iii) as an involuntary separation plan. The remainder of the installments shall be paid in accordance with Paragraph 5(a)(i) and 5(b)(ii) above. 

(iv) Neither the Company nor Employee shall have the right to accelerate or defer the delivery of any such payments or benefits except
to the extent specifically permitted or required by Section 409A of the Code. 
 C. In the event any provision of this
Agreement is ambiguous, but a reasonable interpretation of the provision would cause a payment or benefit not to be subject additional tax imposed by Section 409A, the parties intend that interpretation to govern this Agreement. 

10. Excess Parachute Payments. 
 A. To the extent that any payment, benefit or distribution of any type to or for the benefit of Employee by the Company or any of its affiliates, whether paid or payable, provided or to be provided, or
distributed or distributable pursuant to the terms of this Agreement or otherwise (including, without limitation, any accelerated vesting of stock options or other equity-based awards) (collectively, the “Total Payments”) would be
subject to the excise tax imposed under Section 4999 of the Code, then the Total Payments shall be reduced (but not below zero) so that the maximum amount of the Total Payments (after reduction) shall be one dollar ($1.00) less than the amount which
would cause the Total Payments to be subject to the excise tax imposed by Section 4999 of the Code, but only if the Total Payments so reduced result in Employee receiving a net after tax amount that exceeds the net after tax amount Employee would
receive if the Total Payments were not reduced and were instead subject to the excise tax imposed on excess parachute payments by Section 4999 of the Code. 
 B. If a reduction in the Total Payments is required by the foregoing provisions of this Paragraph, the reduction shall occur in the following order: (i) reduction of cash payments for which the full
amount is treated as a parachute payment; (ii) cancellation of accelerated vesting (or, if necessary, payment) of cash awards for which the full amount is not treated as a parachute payment; (iii) cancellation of any accelerated vesting of equity
awards; and (iv) reduction of any continued employee benefits. In selecting the equity awards (if any), for which vesting will be reduced under clause (iii) of the preceding sentence, awards shall be selected in a manner that maximizes the after-tax
aggregate amount of the Total Payments, provided that if (and only if) necessary in order to avoid the imposition of an additional tax under Section 409A, awards instead shall be selected in the reverse order of the date of grant. In no event shall
Employee have any discretion with respect to the ordering of payment reductions. 
 C. If the Total Payments to Employee are
reduced in accordance with this Paragraph as a result of the uncertainty in the application of Section 4999 of the Code at the time of the initial reduction under this Paragraph, it is possible that Total Payments to Employee which will not have
been made by the Company should have been made (“Underpayment”) or that Total Payments to Employee which were made should not have been made (“Overpayment”). If an Underpayment has occurred, the amount of any such
Underpayment 

  
 6 

 
shall be promptly paid by the Company to or for the benefit of Employee. In the event of an Overpayment, then Employee shall promptly repay to the Company the amount of any such Overpayment
together with interest on such amount (at the same rate as is applied to determine the present value of payments under Section 280G of the Code or any successor thereto), from the date the reimbursable payment was received by Employee to the date
the same is repaid to the Company. 
 11. Warranties. Each party warrants that there is no prior contract which
conflicts, or shall interfere in any manner, with that party’s performance of this Agreement. Each party warrants that its execution of this Agreement has been duly authorized and shall not violate any laws which may be applicable to that
party. The parties have read and understand the terms of this Agreement, have sought and obtained legal counsel as they deem appropriate, and are freely entering into this Agreement, without reliance upon any statements or representations not
contained herein. 
 12. Employee’s Attorney’s Costs. Company shall reimburse Employee for reasonable
attorney’s costs incurred by Employee in connection with the preparation of this Agreement up to a maximum of Five Thousand Dollars. 
 13. Definitions. For purposes of this Agreement the following defined terms shall have the meanings set forth below: 
 A. “Cause” shall mean the occurrence of any of the following: (i) Employee has been indicted or convicted of a serious crime involving moral turpitude or a felony, including any plea of
guilty or nolo contendere; (ii) Employee has engaged in fraudulent or materially dishonest actions in connection with the performance of his or her duties hereunder; (iii) Employee’s willful and grossly negligent or repeated refusal to perform
his or her material duties or responsibilities after written notice of such failure; (iv) Employee’s material violation of any material written policies and procedures of the Company; and/or (v) Employee’s material breach of any of the
material terms of this Agreement or any other material agreement that Employee now has or later has with the Company and/or any of its affiliates that is not cured within fifteen days (15) days after written notice thereof. 

B. “Change in Control” shall mean the occurrence of any of the following: (i) any bona fide sale, conveyance or
disposition of all or substantially all of the Company’s assets (including, without limitation, a grant of an exclusive license or exclusive licenses to all or substantially all of the Company’s intellectual property); (ii) the acquisition
of the Company by means of consolidation, merger or other form of corporate reorganization by a single or related series of transactions in which the outstanding shares of the Company are exchanged for securities or other consideration issued, or
caused to be issued, by the acquiring corporation or its subsidiary (other than a reincorporation transaction); unless the Company’s stockholders of record as constituted immediately prior to such sale, conveyance, disposition or acquisition
will hold more than fifty percent (50%) of the voting power of the surviving entity immediately following such sale, conveyance, disposition or acquisition; or (iii) any person or group of persons becomes the beneficial owner of more than fifty
percent (50%) of the voting power of the Company for the election of directors, but excluding a bona fide financing of the Company in which the Company issues additional or new securities in exchange for an investment in the Company, provided in
each case that the Change in Control also qualifies as a “change in ownership” or a “change in the ownership of substantial assets” of the Company as defined in Treasury Regulation Section 1.409A-3(i)(5). 

  
 7 

 C. “Change in Control Period” shall mean the period commencing on the
closing of a Change in Control and the 12 month period following the consummation of the Change in Control. 
 D.
“Code” shall mean the Internal Revenue Code of 1986, as amended, and is interpretative regulations. 
 E.
“Constructive Termination” shall mean Employee’s termination of his or her employment as a result of the material breach by Company of this Agreement, including (without limitation) any material diminution in the nature or
scope of the authorities, powers, functions, duties or responsibilities of Employee, provided that no such breach shall be considered a Constructive Termination unless Employee has provided Company with written notice of such breach within ninety
(90) days of the breach first occurring and Company has failed to cure such breach within the thirty (30) day period following receipt of such notice. Employment will subsequently terminate sixty (60) days after cure period concludes. 

F. “Triggering Event” shall mean the occurrence of any of the following: (i) the Company’s termination of the
Employee’s employment without Cause; or (ii) a Constructive Termination. 
 14. Governing Law. This Agreement shall
be governed under the internal laws of the State of Maryland, without regard to conflicts of law principles. 
 15.
Disputes. In the event of any difference of opinion or dispute between the parties with respect to the construction or interpretation of this Agreement or the alleged breach thereof, which cannot be settled amicably by agreement of the
parties, such dispute shall be subject to the exclusive jurisdiction of the federal and State courts located in Maryland. Each party hereby submits to the jurisdiction of, and waives any objection to venue in, any such court for purposes of
adjudicating any such dispute. 
 16. Binding Effect. This Agreement shall bind and inure to the benefit of each party,
and each of their successors, shareholders, assigns, heirs, executors, administrators, directors, managers, officers, partners, attorneys, agents, servants and employees. 
 17. Entire Agreement. This Agreement represents the entire agreement between the parties regarding the subject matter hereof and shall supersede all previous communications, representations,
understandings and agreements, including any employment agreements, whether oral or written, by or between the parties with respect thereto. Specifically, that certain Employment Agreement dated June 1, 2017 by and between the parties is hereby
terminated and Employee waives all rights and claims that Employee may have pursuant to such Employment Agreement, including, without limitation, all claims of breach by Company. 

18. Notices. Any notice or other communication required or permitted under this Agreement shall be deemed given on the day it is
delivered in person, or on the third business day following the day in which it was mailed, by first class, registered, or certified mail, to the address of the party to receive the notice. 

  
 8 

 19. Counterparts. This Agreement may be executed in counterparts, each of which
shall be deemed an original, and all of which together shall constitute one and the same instrument. 
 20. Titles.
Titles of the paragraphs of this Agreement are intended solely for convenience of reference and no provision of this Agreement is to be construed by reference to the title of any paragraph. 

21. Other Professional Activities. Subject to the Board’s written approval, Employee may perform certain other professional
activities not related to her or his employment with the Company, but consistent with standard practice so long as those activities do not interfere with his or her obligations to the Company. The Board will review for approval, at the
Company’s sole discretion, these outside activities as requested by Employee. No such approval by the Company will be deemed or construed to modify this Agreement or the Employee Proprietary Information, Inventions, Non-Competition and
Non-Disclosure Agreement. 

  
 9 

 IN WITNESS WHEREOF, the parties have caused this Agreement to be executed as of the day
and year first above written. 
  

			
	NexImmune, Inc.
		
	By:	 	 /s/    John Trainer
 Name: John Trainer

		 	Title: Chief Financial Officer

  

			
	 Employee

		
		 	 /s/    Scott Carmer
 Scott Carmer

  
 10

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00320-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00320-of-00352.parquet"}]]