EX-10.10





 Exhibit 10.10 

AGENTUS THERAPEUTICS, INC. 

2018 EQUITY INCENTIVE PLAN 
 1. DEFINED
TERMS 
 Exhibit A, which is incorporated by reference, defines the terms used in the Plan and includes certain operational rules
related to those terms. 
 2. PURPOSE 

The Plan has been established to advance the interests of the Company by providing for the grant to Participants of Stock, Stock-based and
other incentive Awards. 
 3. ADMINISTRATION 

The Administrator has discretionary authority, subject only to the express provisions of the Plan, to interpret the Plan; determine eligibility
for and grant Awards; determine, modify or waive the terms and conditions of any Award; determine the form of settlement of Awards (whether in cash, shares of Stock, or other property); prescribe forms, rules and procedures relating to the Plan and
Awards; and otherwise do all things necessary or desirable to carry out the purposes of the Plan. Determinations of the Administrator made under the Plan are conclusive and bind all persons. 

4. LIMITS ON AWARDS UNDER THE PLAN 

(a) Number of Shares. Subject to adjustment as provided in Section 7(b) of the Plan, the maximum number of shares of
Stock that may be issued in satisfaction of Awards under the Plan is 3,000,000 shares. Up to the total number of shares of Stock set forth in the preceding sentence may be issued in satisfaction of ISOs, but nothing in this Section 4(a) will be
construed as requiring that any, or any fixed number of, ISOs be awarded under the Plan. For purposes of this Section 4(a), the number of shares of Stock issued in satisfaction of Awards will be determined by excluding shares of Stock withheld
by the Company in payment of the exercise price or purchase price of an Award or in satisfaction of tax withholding requirements with respect to an Award and, for the avoidance of doubt, by excluding any shares of Stock underlying Awards settled in
cash or that expire, become unexercisable, terminate or are forfeited to or repurchased by the Company, in each case, without the issuance of Stock. The limits set forth in this Section 4(a) will be construed to comply with Section 422 to
the extent applicable. 
 (b) Substitute Awards. The Administrator may grant Substitute Awards under the Plan. To the
extent consistent with the applicable requirements of Section 422 and the regulations thereunder, and other applicable legal requirements (including applicable stock exchange requirements), shares of Stock issued under Substitute Awards will be
in addition to and will not reduce the number of shares available under Section 4(a) above, but, notwithstanding anything in Section 4(a) to the contrary, if any Substitute Award is settled in cash or expires, becomes unexercisable,
terminates or is forfeited to or repurchased by the Company without the issuance of Stock, the shares of Stock previously subject to such Substitute Award will not be available for future issuance under the Plan. The Administrator will determine the
extent to which the terms and conditions of the Plan apply to Substitute Awards, if at all. 

  
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 (c) Type of Shares. Stock delivered by the Company under the Plan may
be authorized but unissued Stock or previously issued Stock acquired by the Company. Unless the Administrator determines otherwise, no fractional shares of Stock will be issued under the Plan. 

5. ELIGIBILITY AND PARTICIPATION 
 The
Administrator shall select Participants from among Employees and directors of, and consultants and advisors to, the Company and its affiliates. Eligibility for ISOs is limited to employees of the Company or of a “parent corporation” or
“subsidiary corporation” of the Company as those terms are defined in Section 424 of the Code. Eligibility for Stock Options, other than ISOs, and SARs is limited to individuals described in the first sentence of this Section 5
who are providing direct services on the date of grant of the Award to the Company or to a subsidiary of the Company that would be described in the first sentence of Section 1.409A-1(b)(5)(iii)(E)
of the Treasury Regulations. 
 6. RULES APPLICABLE TO AWARDS 

(a) All Awards. 

(1). Award Provisions. The Administrator shall determine the terms of all Awards, subject to the limitations provided
herein. By accepting (or, under such rules as the Administrator may prescribe, being deemed to have accepted) an Award, the Participant will be deemed to have agreed to the terms of the Award and the Plan. Notwithstanding any provision of this Plan
to the contrary, Substitute Awards may contain terms and conditions that are inconsistent with the terms and conditions specified herein, as determined by the Administrator. 

(2). Term of Plan. No Awards may be made after ten years from the Date of Adoption, but previously granted Awards may
continue beyond that date in accordance with their terms. 
 (3). Transferability. Neither ISOs nor, except as the
Administrator otherwise expressly provides in accordance with the third sentence of this Section 6(a)(3), other Awards may be transferred other than by will or by the laws of descent and distribution. During a Participant’s lifetime, ISOs
and, except as the Administrator otherwise expressly provides in accordance with the third sentence of this Section 6(a)(3), other Awards requiring exercise may be exercised only by the Participant. The Administrator may permit the gratuitous
transfer (i.e., transfer not for value) of Awards other than ISOs, subject to applicable securities and other laws and such limitations or restrictions as the Administrator may impose. Prior to the transfer of any Award pursuant to this
Section 6(a)(3) and as a condition thereto, the transferee shall execute such written agreements in the forms provided by the Company under which such transferee shall become subject to all provisions of the Plan and any applicable Award
agreement and any other agreements requested by the Administrator. 
 (4). Vesting, etc. The
Administrator shall determine the time or times at which an Award vests or becomes exercisable and the terms on which an Award requiring exercise remains exercisable. Without limiting the foregoing, the Administrator may at any time accelerate the
vesting or exercisability of an Award, regardless of any adverse or potentially adverse tax or other consequences resulting from such acceleration. Unless the Administrator expressly provides otherwise, however, the following rules will apply if a
Participant’s Employment ceases: 

  
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 (A) Except as provided in (B) and (C) below, immediately upon
the cessation of the Participant’s Employment, each Stock Option and SAR that is then held by the Participant or by the Participant’s permitted transferees, if any, will cease to be exercisable and will terminate, and all other Awards that
are then held by the Participant or by the Participant’s permitted transferees, if any, to the extent not then vested will be forfeited. 

(B) Subject to (C) and (D) below, each Stock Option and SAR held by the Participant or the Participant’s
permitted transferee, if any, immediately prior to the cessation of the Participant’s Employment, to the extent then exercisable, will remain exercisable for the lesser of (i) a period of 90 days following such cessation of Employment or
(ii) the period ending on the latest date on which such Stock Option or SAR could have been exercised without regard to this Section 6(a)(4), and will thereupon immediately terminate. 

(C) Subject to (D) below, each Stock Option and SAR held by a Participant or the Participant’s permitted
transferee, if any, immediately prior to the cessation of the Participant’s Employment due to his or her death, to the extent then exercisable, will remain exercisable for the lesser of (i) the
one-year period ending on the first anniversary of such cessation of Employment or (ii) the period ending on the latest date on which such Stock Option or SAR could have been exercised without regard to
this Section 6(a)(4), and will thereupon immediately terminate. 
 (D) All Awards (whether or not vested or
exercisable) held by a Participant or the Participant’s permitted transferees, if any, immediately prior to the cessation of the Participant’s Employment will immediately terminate upon such cessation of Employment if such cessation is for
Cause or occurs in circumstances that in the determination of the Administrator would have constituted grounds for the Participant’s Employment to be terminated for Cause (in each case, without regard to the lapsing of any required notice or
cure periods in connection therewith).  
 (5). Recovery of
Compensation. The Administrator may provide in any case that any outstanding Award (whether or not vested or exercisable) and the proceeds from the exercise or disposition of any Award or Stock thereunder will be subject to forfeiture and
disgorgement to the Company, with interest and other related earnings, (i) if the Participant to whom the Award was granted is not in compliance with any provision of the Plan or any applicable Award Agreement, any non-competition, non-solicitation, confidentiality or other restrictive covenant by which he or she is bound, or any policy of the Company or any of its affiliates that is
applicable to the Participant and that provides for forfeiture, disgorgement or clawback with respect to incentive compensation that includes Awards under the Plan; or (ii) to the extent required by law or applicable stock exchange listing
standards, including, without limitation, Section 10D of the Securities Exchange Act of 1934, as amended. Each Participant, by accepting or being deemed to have accepted an Award under the Plan, agrees to cooperate fully with the Administrator,
and to cause any and all permitted transferees of the Participant to cooperate fully with the Administrator, to effectuate any forfeiture or disgorgement described in this Section 6(a)(5). 

  
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 (6). Taxes. The issuance, delivery, vesting and retention of Stock,
cash or other property under an Award are conditioned upon full satisfaction by the Participant of all tax withholding requirements with respect to the Award. The Administrator shall prescribe such rules for the withholding of taxes with respect to
any Award as it deems necessary. The Administrator may hold back shares of Stock from an Award or permit a Participant to tender previously owned shares of Stock in satisfaction of tax withholding requirements (but not in excess of the maximum
withholding amount consistent with the award being subject to equity accounting treatment under the Accounting Rules). 
 (7).
Dividend Equivalents, etc. The Administrator may provide for the payment of amounts (on terms and subject to conditions established by the Administrator) in lieu of cash dividends or other cash distributions
with respect to Stock subject to an Award whether or not the holder of such Award is otherwise entitled to share in the actual dividend or distribution in respect of such Award. Any entitlement to dividend equivalents or similar entitlements will be
established and administered either consistent with an exemption from, or in compliance with, the applicable requirements of Section 409A. Dividends or dividend equivalent amounts payable in respect of Awards that are subject to restrictions
may be subject to such limitations or restrictions as the Administrator may impose. 
 (8). Rights Limited. Nothing in
the Plan will be construed as giving any person the right to be granted an Award or to continued employment or service with the Company or any of its affiliates, or any rights as a stockholder except as to shares of Stock actually issued under the
Plan. The loss of existing or potential profit in an Award will not constitute an element of damages in the event of the cessation of a Participant’s Employment for any reason, even if such cessation of Employment is in violation of an
obligation of the Company or one of its affiliates to the Participant. 
 (9). Coordination with Other Plans. Awards
under the Plan may be granted in tandem with, or in satisfaction of or substitution for, other Awards under the Plan or awards made under other compensatory plans or programs of the Company or its affiliates. For example, but without limiting the
generality of the foregoing, awards under other compensatory plans or programs of the Company or its affiliates may be settled in Stock (including, without limitation, Unrestricted Stock) if the Administrator so determines, in which case the shares
of Stock so delivered will be treated as issued under the Plan (and will reduce the number of shares of Stock thereafter available under the Plan in accordance with the rules set forth in Section 4 above). 

(10). Section 409A. 

(A) Without limiting the generality of Section 11(b) of the Plan, each Award will contain such terms as the
Administrator determines, and will be construed and administered, such that the Award either qualifies for an exemption from the applicable requirements of Section 409A or satisfies such requirements. 

  
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 (B) Notwithstanding Section 9 of the Plan or any other provision
of the Plan or any Award agreement to the contrary, the Administrator may unilaterally amend, modify or terminate the Plan or any outstanding Award, including, but not limited to, by changing the type or form of the Award, if the Administrator
determines that such amendment, modification or termination is necessary or desirable to avoid the imposition of an additional tax, interest or penalty under Section 409A. 

(C) If a Participant is determined on the date of the Participant’s cessation of Employment to be a “specified
employee” within the meaning of that term under Section 409A(a)(2)(B) of the Code, then, with regard to any payment that is considered nonqualified deferred compensation under Section 409A, to the extent applicable, payable on account
of a “separation from service”, such payment will be made or provided on the date that is the earlier of (i) the expiration of the six-month period measured from the date of such
“separation from service” and (ii) the date of the Participant’s death (the “Delay Period”). Upon the expiration of the Delay Period, all payments delayed pursuant to this Section 6(a)(10)(C) (whether they
would have otherwise been payable in a single lump sum or in installments in the absence of such delay) will be paid on the first business day following the expiration of the Delay Period in a lump sum and any remaining payments due under the Award
will be paid in accordance with the normal payment dates specified for them in the applicable Award agreement. 
 (D)
For purposes of Section 409A, each payment made under this Plan will be treated as a separate payment. 
 (E)
With regard to any payment considered to be nonqualified deferred compensation under Section 409A, to the extent applicable, that is payable upon a change in control of the Company or other similar event, to the extent required to avoid the
imposition of an additional tax, interest, or penalty under Section 409A, no amount will be payable unless such change in control constitutes a “change in control event” within the meaning of
Section 1.409A-3(i)(5) of the Treasury Regulations. 
 (b) Awards Requiring
Exercise. 
 (1). Time and Manner of Exercise. Unless the Administrator expressly provides otherwise, an Award
requiring exercise will not be deemed to have been exercised until the Administrator receives a notice of exercise in a form acceptable to the Administrator that is signed by the appropriate person and accompanied by any payment required under the
Award. Any attempt to exercise an Award by any person other than the Participant will not be given effect unless the Administrator has received such evidence as it may require that the person exercising the Award has the right to do so. 

(2). Exercise Price. The exercise price (or the base value from which appreciation is to be measured) of each Award
requiring exercise must be no less than 100% (in the case of an ISO granted to a 10-percent stockholder within the meaning of subsection (b)(6) of Section 422, 110%) of the Fair Market Value of the Stock
subject to the Award, determined as of the date of grant, or such higher amount as the Administrator may determine in connection with the grant. 

  
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 (3). Payment of Exercise Price. When the exercise of an Award (or
portion thereof) is to be accompanied by a payment, payment must be by cash or check acceptable to the Administrator or, if so permitted by the Administrator and if legally permissible, (i) through the delivery of previously acquired
unrestricted shares of Stock, or the withholding of unrestricted shares of Stock otherwise deliverable upon exercise, vesting or settlement, in either case, that have a Fair Market Value equal to the exercise price; (ii) at such time, if any,
as the Stock is publicly traded, through a broker-assisted exercise program acceptable to the Administrator; (iii) by other means acceptable to the Administrator; or (iv) by any combination of the foregoing permissible forms of payment.
The delivery of any previously acquired shares of Stock in payment of the exercise price under clause (i) above may be accomplished either by actual delivery or by constructive delivery through attestation of ownership, subject to such rules as
the Administrator may prescribe. 
 (4). Maximum Term. The maximum term of awards requiring exercise must not exceed 10
years from the date of grant (or five years from the date of grant in the case of an ISO granted to a 10-percent stockholder described in Section 6(b)(2) above). 

7. EFFECT OF CERTAIN TRANSACTIONS 
 (a)
Covered Transactions. Except as otherwise expressly provided in an Award agreement or by the Administrator, the Administrator may, but need not, take the following actions in the event of a Covered Transaction: 

(1). Assumption or Substitution. If the Covered Transaction is one in which there is an acquiring or surviving entity, the
Administrator may provide for (i) the assumption or continuation of some or all outstanding Awards or any portion thereof or (ii) for the grant of new awards in substitution therefor by the acquiror or survivor or an affiliate of the
acquiror or survivor. 
 (2). Cash-Out of Awards. Subject to
Section 7(a)(5) below, the Administrator may provide for payment (a “cash-out”), with respect to some or all Awards or any portion thereof, equal in the case of each affected Award or portion
thereof to the excess, if any, of (i) the Fair Market Value of one share of Stock multiplied by the number of shares of Stock subject to such Award or portion, minus (ii) the aggregate exercise or purchase price, if any, of such Award or
portion (or, in the case of a SAR, the aggregate base value above which appreciation is measured), in each case, on such payment and other terms and subject to such conditions (which need not be the same as the terms and/or conditions applicable to
holders of Stock) as the Administrator determines, including that any amounts paid in respect of such Award in connection with the Covered Transaction be placed in escrow or otherwise made subject to such restrictions as the Administrator deems
appropriate. For the avoidance of doubt, that if the per share exercise or purchase price (or base value) of an Award or portion thereof is equal to or greater than the Fair Market Value of one share of Stock, the Award or applicable portion may be
cancelled with no payment due hereunder or otherwise in respect of such Award. 

  
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 (3). Acceleration of Certain Awards. Subject to Section 7(a)(5)
below, the Administrator may provide that any Award requiring exercise will become exercisable, in full or in part, and/or that the delivery of any shares of Stock remaining deliverable under any outstanding Award of Stock Units (including
Restricted Stock Units and Performance Awards to the extent consisting of Stock Units) will be accelerated, in full or in part, in each case, on a basis that gives the holder of the Award a reasonable opportunity, as determined by the Administrator,
following the exercise of the Award or the delivery of the shares, as the case may be, to participate as a stockholder in the Covered Transaction. 

(4). Termination of Awards upon Consummation of Covered Transaction. Except as the Administrator may otherwise determine,
each Award will automatically terminate (and in the case of outstanding shares of Restricted Stock, will automatically be forfeited) immediately upon the consummation of the Covered Transaction, other than any Award that is assumed, continued or
substituted for pursuant to Section 7(a)(1) above. 
 (5). Additional Limitations. Any share of Stock and any cash
or other property delivered pursuant to Section 7(a)(2) or Section 7(a)(3) above with respect to an Award may, in the discretion of the Administrator, contain such limitations or restrictions, if any, as the Administrator deems
appropriate, including to reflect any performance or other vesting conditions to which the Award was subject and that did not lapse (and were not satisfied) in connection with the Covered Transaction. For purposes of the immediately preceding
sentence, a cash-out under Section 7(a)(2) above or an acceleration under Section 7(a)(3) above will not, in and of itself, be treated as the lapsing (or satisfaction) of a performance or other
vesting condition. In the case of Restricted Stock that does not vest and is not forfeited in connection with the Covered Transaction, the Administrator may require that any amounts delivered, exchanged or otherwise paid in respect of such Stock in
connection with the Covered Transaction be placed in escrow or otherwise made subject to such restrictions as the Administrator deems appropriate to carry out the intent of the Plan. 

(b) Changes in and Distributions with Respect to Stock. 

(1). Basic Adjustment Provisions. In the event of a Recapitalization Transaction, the Administrator shall make appropriate
adjustments to the maximum number of shares of Stock specified in Section 4(a) above that may be issued under the Plan and shall make appropriate adjustments to the number and kind of shares of stock or securities underlying Awards then
outstanding or subsequently granted, any exercise or purchase prices (or base values) relating to Awards and any other provision of Awards affected by such change. 

(2). Certain Other Adjustments. The Administrator may also make adjustments of the type described in Section 7(b)(1)
above to take into account distributions to stockholders other than those provided for in Section 7(a) and 7(b)(1) above, or any other event, if the Administrator determines that adjustments are appropriate to avoid distortion in the operation
of the Plan, having due regard for the qualification of ISOs under Section 422 and the requirements of Section 409A, in each case, to the extent applicable. 

(3). Continuing Application of Plan Terms. References in the Plan to shares of Stock will be construed to include any
stock or securities resulting from an adjustment pursuant to this Section 7. 

  
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 8. LEGAL CONDITIONS ON DELIVERY OF STOCK 

The Company will not be obligated to deliver any shares of Stock pursuant to the Plan or to remove any restriction from any shares of Stock
previously delivered under the Plan until: (i) the Company is satisfied that all legal matters in connection with the issuance and delivery of such shares have been addressed and resolved; (ii) if the outstanding Stock is at the time of
delivery listed on any stock exchange or national market system, the shares to be delivered have been listed or authorized to be listed on such exchange or system upon official notice of issuance; and (iii) all conditions of the Award have been
satisfied or waived. The Company may require, as a condition to the exercise of an Award or the delivery of shares of Stock under an Award, such representations or agreements as counsel for the Company may consider appropriate to avoid violation of
the Securities Act or any other applicable state or non-U.S. securities law. Any Stock issued under the Plan will be evidenced in such manner as the Administrator may deem appropriate, including book-entry
registration or delivery of stock certificates. In the event that the Administrator determines that stock certificates will be issued in connection with Stock issued or delivered under the Plan, the Administrator may require that such certificates
bear an appropriate legend reflecting any restriction on transfer applicable to such Stock, and the Company may hold the certificates pending lapse of the applicable restrictions. 

9. AMENDMENT AND TERMINATION 
 The
Administrator may at any time or times amend the Plan or any outstanding Award for any purpose which may at the time be permitted by law, and may at any time terminate the Plan as to any future grants of Awards; provided, however, that
except as otherwise expressly provided in the Plan the Administrator may not, without the Participant’s consent, alter the terms of an Award so as to affect materially and adversely the Participant’s rights under the Award, unless the
Administrator expressly reserved the right to do so at the time the Award was granted. Any amendments to the Plan will be conditioned upon stockholder approval only to the extent, if any, such approval is required by law (including the Code), as
determined by the Administrator. 
 10. OTHER COMPENSATION ARRANGEMENTS 

The existence of the Plan or the grant of any Award will not affect the Company’s right to award a person bonuses or other compensation in
addition to Awards under the Plan. 
 11. MISCELLANEOUS 

(a) Waiver of Jury Trial. To the extent permitted by applicable law, by accepting, or being deemed to have accepted, an
Award under the Plan, each Participant waives any right to a trial by jury in any action, proceeding or counterclaim concerning any rights under the Plan and any Award, or under any amendment, waiver, consent, instrument, document or other agreement
delivered or which in the future may be delivered in connection therewith, and agrees that any such action, proceedings or counterclaim will be tried before a court and not before a jury. By accepting or being deemed to have accepted an Award under
the Plan, each Participant certifies that no officer, representative, or attorney of the Company or any of its affiliates, or other person, has represented, expressly or otherwise, that the Company would not, in the event of any action, proceeding
or counterclaim, seek to enforce the foregoing waivers. Notwithstanding anything to 

  
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the contrary in the Plan, nothing herein is to be construed as limiting the ability of the Company and a Participant to agree to submit disputes arising under the terms of the Plan or any Award
made hereunder to binding arbitration or as limiting the ability of the Company to require any eligible individual to agree to submit such disputes to binding arbitration as a condition of receiving an Award hereunder. 

(b) Limitation of Liability. Notwithstanding anything to the contrary in the Plan, neither the Company, nor any of its
affiliates, nor the Administrator, nor any person acting on behalf of the Company, any of its affiliates, or the Administrator, will be liable to any Participant or to the estate or beneficiary of any Participant or to any other person by reason of
any acceleration of income, or any additional tax (including any interest and penalties), asserted by reason of the failure of an Award to satisfy the requirements of Section 422 or Section 409A or by reason of Section 4999 of the
Code, or otherwise asserted with respect to the Award. 
 12. ESTABLISHMENT OF SUB-PLANS 

The Administrator may at any time and from time to time establish one or more sub-plans under the Plan
(for local law compliance purposes or other administrative reasons determined by the Administrator) by adopting supplements to the Plan containing, in each case, such limitations on the Administrator’s discretion under the Plan, and such
additional terms and conditions, as the Administrator deems necessary or desirable. Each supplement so established will be deemed to be part of the Plan but will apply only to Participants within the group to which the supplement applies (as
determined by the Administrator). 
 13. GOVERNING LAW 

(a) Certain Requirements of Corporate Law. Awards will be granted and administered consistent with the requirements of
applicable Delaware law relating to the issuance of stock and the consideration to be received therefor, and with the applicable requirements of the stock exchanges or other trading systems on which the Stock is listed or entered for trading, in
each case, as determined by the Administrator. 
 (b) Other Matters. Except as otherwise provided by the express terms
of an Award agreement, under a sub-plan described in Section 12 or as provided in Section 13(a) above, the domestic substantive laws of the Commonwealth of Massachusetts govern the provisions of the
Plan and of Awards under the Plan and all claims or disputes arising out of or based upon the Plan or any Award under the Plan or relating to the subject matter hereof or thereof without giving effect to any choice or conflict of laws provision or
rule that would cause the application of the domestic substantive laws of any other jurisdiction. 
 (c) Jurisdiction.
By accepting an Award under the Plan, each Participant will be deemed to (i) have submitted irrevocably and unconditionally to the jurisdiction of the federal and state courts located within the geographic boundaries of the United States
District Court for the District of Massachusetts for the purpose of any suit, action or other proceeding arising out of or based upon the Plan or any Award; (ii) agree not to commence any suit, action or other proceeding arising out of or based
upon the Plan or an Award, except in the federal and state courts located within the geographic boundaries of the United States District Court for the District of 

  
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Massachusetts; and (iii) waive, and agree not to assert, by way of motion as a defense or otherwise, in any such suit, action or proceeding, any claim that he or she is not subject
personally to the jurisdiction of the above-named courts that his or her property is exempt or immune from attachment or execution, that the suit, action or proceeding is brought in an inconvenient forum, that the venue of the suit, action or
proceeding is improper or that the Plan or an Award or the subject matter thereof may not be enforced in or by such court. 
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 EXHIBIT A 

Definition of Terms 

The following terms, when used in the Plan, have the meanings and are subject to the provisions set forth below: 

“Accounting Rules”: Financial Accounting Standards Board Accounting Standards Codification Topic 718, or any successor
provision. 
 “Administrator”: The Board, except that the Board may delegate (i) to a committee of the Board (or one
or more other members of the Board) such of its duties, powers and responsibilities as it may determine (in which case references herein to the Board will refer to such committee (or members of the Board)); (ii) to one or more officers of the
Company the power to grant rights or Awards to the extent permitted by Section 157(c) of the Delaware General Corporation Law; and (iii) to such Employees or other persons as it determines such ministerial tasks as it deems appropriate. In
the event of any delegation described in the preceding sentence, the term “Administrator” will include the person or persons so delegated to the extent of such delegation. 

“Award”: Any or a combination of the following: 

(i) Stock Options; 
 (ii) SARs;

 (iii) Restricted Stock; 

(iv) Unrestricted Stock; 
 (v)
Stock Units, including Restricted Stock Units; 
 (vi) Performance Awards; and 

(vii) Awards (other than Awards described in (i) through (vi) above) that are convertible into or otherwise based on Stock. 

“Board”: The Board of Directors of the Company. 

“Cause”: In the case of any Participant who is party to an employment or severance-benefit agreement that contains a
definition of “Cause,” the definition set forth in such agreement applies with respect to such Participant for purposes of the Plan for so long as such agreement is in effect. In every other case, “Cause” means, as determined by
the Administrator, (i) a substantial failure of the Participant to perform the Participant’s duties and responsibilities to the Company or any of its affiliates or substantial negligence in the performance of such duties and
responsibilities; (ii) the commission by the Participant of a felony or a crime involving moral turpitude; (iii) the commission by the Participant of any act of theft, fraud, embezzlement, material breach of trust or any material act of
dishonesty involving the Company or any of its affiliates; (iv) 

  
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a significant violation by the Participant of any applicable code of conduct of the Company or any of its affiliates, of any applicable material policy of the Company or any of its affiliates, or
of any statutory or common law duty of loyalty to the Company or any of its affiliates; (v) material breach of any of the terms of the Plan or any Award, or of the terms of any other agreement between the Company or any of its affiliates and
the Participant; or (vi) other conduct by the Participant that could be expected to be harmful to the business, interests or reputation of the Company or any of its affiliates. 

“Code”: The U.S. Internal Revenue Code of 1986 as from time to time amended and in effect, or any successor statute as from
time to time in effect. 
 “Company”: AgenTus Therapeutics, Inc., a Delaware corporation. 

“Covered Transaction”: Any of (i) a consolidation, merger, or similar transaction or series of related transactions,
including a sale or other disposition of stock, in which the Company is not the surviving entity or which results in the acquisition of all or substantially all of the Company’s then outstanding common stock by a single person or entity or by a
group of persons and/or entities acting in concert; (ii) a sale or transfer of all or substantially all the Company’s assets; (iii) a dissolution or liquidation of the Company; or (iv) such other transaction or event as the
Administrator determines. 
 “Date of Adoption”: The earlier of the date the Plan was approved by the Company’s
stockholders or adopted by the Board, as determined by the Administrator. 
 “Employee”: Any person who is employed by the
Company or by an affiliate of the Company. 
 “Employment”: A Participant’s employment or other service relationship
with the Company and its affiliates. Employment will be deemed to continue, unless the Administrator expressly provides otherwise, so long as the Participant is employed by, or otherwise is providing services in a capacity described in
Section 5 of the Plan to, the Company or one of its affiliates. If a Participant’s employment or other service relationship is with an affiliate and that entity ceases to be an affiliate of the Company, the Participant’s Employment
will be deemed to have terminated when the entity ceases to be an affiliate of the Company unless the Participant transfers Employment to the Company or one of its remaining affiliates. Notwithstanding the foregoing, in construing the provisions of
any Award relating to the payment of “nonqualified deferred compensation” (subject to Section 409A) upon a termination or cessation of Employment, references to termination or cessation of employment, separation from service,
retirement or similar or correlative terms will be construed to require a “separation from service” (as that term is defined in Section 1.409A-1(h) of the Treasury Regulations) from the Company
and from all other corporations and trades or businesses, if any, that would be treated as a single “service recipient” with the Company under Section 1.409A-1(h)(3) of the Treasury Regulations.
The Company may, but need not, elect in writing, subject to the applicable limitations under Section 409A, any of the special elective rules prescribed in Section 1.409A-1(h) of the Treasury
Regulations for purposes of determining whether a “separation from service” has occurred. Any such written election will be deemed a part of the Plan. 

  
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 “Fair Market Value”: As of a particular date, (i) the fair market
value of a share of Stock determined by the Administrator consistent with the rules of Section 422 and Section 409A to the extent applicable or (ii) in the event that the Stock is traded on a national securities exchange, the closing
price for a share of Stock reported on the national securities exchange on which the Stock is then listed for that date or, if no closing price is reported for that date, the closing price on the immediately preceding date on which a closing price
was reported. 
 “ISO”: A Stock Option intended to be an “incentive stock option” within the meaning of
Section 422. Each Stock Option granted pursuant to the Plan will be treated as providing by its terms that it is to be a non-incentive Stock Option unless, as of the date of grant, it is expressly
designated as an ISO. 
 “Participant”: A person who is granted an Award under the Plan. 

“Performance Award”: An Award subject to specified criteria, other than the mere continuation of Employment or the mere
passage of time, the satisfaction of which is a condition for the grant, exercisability, vesting or full enjoyment of the Award. 

“Plan”: The AgenTus Therapeutics, Inc. 2018 Equity Incentive Plan, as from time to time amended and in effect. 

“Recapitalization Transaction”: A stock dividend, stock split or combination of shares (including a reverse stock split),
recapitalization or other change in the Company’s capital structure that constitutes an equity restructuring within the meaning of the Accounting Rules. 

“Restricted Stock”: Stock subject to restrictions requiring that it be forfeited, redelivered or offered for sale to the
Company if specified service or performance-based conditions are not satisfied. 
 “Restricted Stock Unit”: A Stock Unit
that is, or as to which the delivery of Stock or cash in lieu of Stock is, subject to the satisfaction of specified performance or other vesting conditions. 

“SAR”: A right entitling the holder upon exercise to receive an amount (payable in cash or in shares of Stock of equivalent
value) upon exercise equal to the excess of the Fair Market Value of the shares of Stock subject to the right over the base value from which appreciation under the SAR is to be measured. 

“Section 409A”: Section 409A of the Code. 

“Section 422”: Section 422 of the Code. 

“Securities Act”: Securities Act of 1933, as amended. 

“Stock”: Common stock of the Company, par value $0.00001 per share. 

“Stock Option”: An option entitling the holder to acquire shares of Stock upon exercise and the payment of the exercise
price. 

  
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 “Stock Unit”: An unfunded and unsecured promise, denominated in shares of
Stock, to deliver Stock or cash measured by the value of Stock in the future. 
 “Substitute Award”: An Award issued under
the Plan in substitution for one or more equity awards of an acquired company that are converted, replaced or adjusted in connection with the acquisition. 

“Unrestricted Stock”: Stock not subject to any restrictions under the terms of the Award. 

  
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