Document:

EX-10.9

 Exhibit 10.9 

Adicet Bio, Inc. 
 April 28, 2020

 Anil Singhal 
  

	Re:	 Transition Agreement 

Dear Anil, 
 This letter (the “Transition
Agreement”) confirms the agreement between you and Adicet Bio, Inc. (the “Company”) (collectively, the “parties”) regarding the transition of your position with the Company on the following terms: 

1.    Transition. You acknowledge that, in the event that the proposed reverse triangular merger among the
Company, a publicly traded company previously disclosed to you (“Parent”), and a wholly owned subsidiary of Parent (“Merger Sub”), pursuant to which Merger Sub will merge with and into the Company with the Company
surviving as a wholly owned subsidiary of Parent (the “Merger”) pursuant to an agreement and plan of merger anticipated to be entered into shortly following the date hereof (the “Merger Agreement”), is consummated
(the “Closing”), your employment with the Company as Chief Executive Officer, President, Treasurer and Secretary shall end effective as of the Closing (such date, the “Resignation Date”). You further acknowledge
that on your Resignation Date you will receive your final paycheck, which includes your final wages and pay for any accrued but unused vacation or personal days through your last day of employment, less withholdings. You agree to submit any claims
for reimbursement for unreimbursed business expenses within 10 days of the Resignation Date in accordance with the Company’s normal procedures for reimbursement. The parties acknowledge that except as provided for in this Transition Agreement,
all benefits and perquisites of employment cease as of your last day of employment, including any and all temporary housing and travel arrangements provided to you by the Company. 

2.    Future Service. The parties wish to provide for a smooth succession, including providing the Company
time for you and the Company to transition knowledge, relationships, and other matters that you acquired in your years with the Company. Accordingly, you agree that following your Resignation Date you will continue to assist the Company and Parent
in the transition to new management (the “Services”) as set out in the Independent Contractor Services Agreement (set forth in Attachment A) (the “Independent Contractor Services Agreement”). 

3.    Resignation. For purposes of this Transition Agreement, the parties acknowledge and agree that
you have voluntarily elected to resign from your employment without Good Reason as defined in Section 3.c.iii of your Executive Employment Agreement, dated April 23, 2019, as amended, modified or restated from time to time (the
“Employment Agreement”), and therefore you are not entitled to any Severance Benefits (as defined in the Employment Agreement), upon termination of your employment under Section 3.b of the Employment Agreement. You also
acknowledge that effective as of the Resignation Date, you shall cease to hold, and be deemed to have resigned from (and hereby resign effective as of the Resignation Date from), any and all titles, positions and appointments you hold with the
Company and/or any of its subsidiaries, whether as an officer, trustee, director, employee, trustee, committee member or otherwise. You further agree to execute any documents reasonably requested by the Company in connection with the actions
contemplated by the preceding sentence. On and after your Resignation Date, you agree that you will not represent to anyone that you are still an employee or officer of the Company or any of its subsidiaries or affiliates or and you will not say or
do anything purporting to bind the Company or any of its subsidiaries or affiliates. 

  
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 4.    Consideration. Although you are not otherwise
entitled to receive any additional consideration from the Company under the circumstances of your resignation, subject to, and in consideration for your providing the Company with an executed copy of this Transition Agreement and the Independent
Contractor Services Agreement, and provided you continue in service as an employee of the Company through the Resignation Date and comply with all of the terms and conditions of this Transition Agreement, the Independent Contractor Services
Agreement, the Employee Proprietary Information and Invention Assignment Agreement entered into by and between you and the Company (the “Proprietary Information Agreement”) and all applicable Company policies, the Company will
provide you with the following (“Consideration”): (a) the consulting relationship set forth in the Independent Contractor Services Agreement and (b) the payments and benefits set forth in Section 6 (subject to the
terms and conditions thereof). 
 5.    Equity. 

a.    You acknowledge and agree that (i) you currently own options to purchase (A) 3,128,049 shares of
the Common Stock of the Company pursuant to that certain Notice of Stock Option Award and Stock Option Award Agreement (Award Number 118), dated as of May 22, 2019, by and between you and the Company and the Company’s 2015 Stock Incentive
Plan, as amended (the “Plan”) and (B) 2,814,768 shares of the Common Stock of the Company pursuant to that certain Notice of Stock Option Award and Stock Option Award Agreement (Award Number 140), dated as of October 15,
2019, by and between you and the Company and the Plan (the “Existing Options”), (ii) you may become eligible to receive additional options to purchase up to 364,112 shares of the Common Stock of the Company in accordance with, and
subject to the terms of the Employment Agreement (the “Milestone Options”) (the Existing Options and Milestone Options, collectively, the “Options” and the related option agreements for the Options, collectively,
the “Option Agreements”) and (iii) other than the Options, and notwithstanding anything to the contrary, you do not have any right, title, claim or interest in or to any equity or other security of the Company, any security
convertible or exercisable into any of the foregoing, or any right to purchase or receive any of the foregoing (whether presently, as a result of the passage of time or upon the occurrence of any events). 

b.    You and the Company acknowledge and agree that, notwithstanding anything to the contrary, including your
service to the Company pursuant to the Independent Contractor Services Agreement or in any other capacity: (i) your transition from an employee to a consultant of the Company as contemplated hereby will not be deemed to be a termination of your
Continuous Service for purposes of the Option Agreements (other than as provided for in subsection (iii) below); (ii) following such transition, Continuous Service for purposes of the Option Agreements shall refer solely to your continued
service to the Company or its affiliates (including Parent) as a consultant pursuant to the Independent Contractor Services Agreement; (iii) following such transition, your Continuous Service for purposes of the Option Agreement shall be deemed
to have been terminated upon the earliest of (the “Vesting End Date”): (1) the termination of your services pursuant to the Independent Contractor Services Agreement or (2) May 7, 2021; (iv) in no event shall you vest in any
further shares under the Options following the Vesting End Date (notwithstanding any continuation in your “Continuous Service” for purposes of the Options); provided, however, that if the Company terminates your service under the
Independent Contractor Services Agreement without ICSA Cause (as defined below) prior to May 7, 2021, you shall vest in all then unvested shares subject to the Options (the “Unvested Shares”) that would have vested from the
date of such termination without ICSA Cause through May 7, 2021; (v) all Unvested Shares (including, for the avoidance of doubt, the Milestone Options and other than any Unvested Shares you may potentially vest in as a result of your
service prior to May 7, 2021 pursuant to the Independent Contractor 

  
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Services Agreement or pursuant to clause (iv) above) shall be deemed forfeited as of the Resignation Date and (vi) the acceleration provisions set forth in the Option Agreements shall
terminate on the Resignation Date and shall thereafter be null and void. The Option Agreements are hereby amended to the extent necessary to reflect the foregoing. 

c.    “ICSA Cause” shall mean (i) your intentional performance of any act or failure to
perform any act in bad faith and to the detriment of the Company or its affiliates, including, but not limited to, misappropriation of trade secrets, fraud or embezzlement; (ii) material breach by you of any written agreement with the Company
or its affiliates; (iii) your conviction or plea of no-contest to any felony or any crime of moral turpitude, (iv) your willful refusal to implement or follow a lawful policy or directive of the
Company or its affiliates; or (v) your engagement in misfeasance or malfeasance demonstrated by a pattern of failure to perform job duties diligently and professionally; provided, however, that except for an action, omission, failure, breach,
refusal or other event which, by its nature, cannot reasonably be expected to be cured, you shall have twenty (20) days from the delivery of written notice by the Company within which to cure any acts constituting ICSA Cause; provided however,
that, if the Company reasonably expects material injury from a delay of twenty (20) days, the Company may give you notice of such shorter period within which to cure as is reasonable under the circumstances, which may include the termination of
the Independent Contractor Services Agreement without notice and with immediate effect. 
 d.    Your further
acknowledge and agree that any unexercised Options that are incentive stock options shall cease to be treated as incentive stock options and shall be treated for tax purposes as non-statutory stock options
upon the effective date of this Transition Agreement. 
 e.    The Options will remain subject to the terms and
conditions of the following (as modified hereby, as applicable): (i) the Option Agreements, (ii) the Plan and (iii) the Company’s Bylaws, in each case, as may be amended, modified or restated from time to time (collectively, the
“Equity Documents”). The Equity Documents will remain in full force and effect and, to the extent applicable, will govern any shares of the Company’s capital stock or other securities of the Company that you currently own or
hereafter may acquire in the future (including, but not limited to, any shares you may receive upon exercise of the Options). 

f.    You expressly acknowledge and agree that the Merger and the related transactions shall not constitute a
“Liquidation” for purposes of the Employment Agreement or any of the Options. Further, you acknowledge and agree that (i) you understand and agree to the treatment of the Options pursuant to the Merger Agreement, a draft of which has
been provided to you prior to the date hereof, (ii) the Milestone Options may be granted to you following consummation of the Merger and (iii) in such event, (A) the Milestone Options would be for shares of Parent’s common stock
under a Parent equity incentive plan, (B) the Milestone Options would be subject to the terms of Parent’s standard stock option agreement, (C) the Milestone Options would have a per share exercise price equal to the per share fair
market value of Parent’s common stock on the date of grant, as determined by the board of directors of Parent (D) an adjustment would be made to the number of shares subject to the Milestone Options above based on the terms of the Merger
Agreement, (E) your service under the Independent Contractor Services Agreement will qualify for purposes of the Milestone Options as remaining in continuous service as the Company’s Chief Executive Officer. 

6.    Termination Consideration. Solely if either: (i) you continue to provide services as an employee
of the Company through the Resignation Date and the Closing occurs or (ii) the Company terminates your employment prior to your Resignation Date other than (a) for Cause (as defined in the Employment Agreement), (b) as a result of your
death or (c) as a result of your Disability (as defined in the Employment Agreement), the Company will provide you with the payments and benefits listed in this 

  
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 Section 6 (the “Termination Consideration”), subject to and contingent upon
Section 8 of this Transition Agreement: 
 a.    A payment of $470,000, payable in one lump sum within
sixty (60) days following the Resignation Date. 
 b.    An amount equal to the prorated portion of
$211,500 based on the ratio that the number of days elapsed in calendar year 2020 prior to the Resignation Date bears to 365 (the “2020 Bonus Payment”), payable in one lump sum within sixty (60) days following the Resignation
Date. 
 c.    A payment of $250,000, payable in one lump sum on January 1, 2021. 

d.    A payment of $24,000, payable in one lump sum within sixty (60) days following the Resignation Date.

 e.    The vesting of all Options then held by you shall be accelerated such that all Options shall be deemed
vested as if you had remained continuously employed for twelve (12) months following the Resignation Date. 

f.    All vested Options then held by you as of the Resignation Date or that subsequently vest in accordance with
Section 5 shall remain exercisable until the twelve (12) month anniversary of the termination of your services pursuant to the Independent Contractor Services Agreement; provided, however, that no such Option shall be exercisable after the
expiration of its maximum term pursuant to the terms thereto. 
 g.    Reimbursement for up to $15,000 of your
reasonable and documented legal expenses incurred in connection with this Transition Agreement. 
 7.    Early
Resignation. You acknowledge and agree that if you resign from employment prior to the Resignation Date (an “Early Resignation”), you will not be entitled to any Termination Consideration, or any Severance Benefits under
the Employment Agreement or any acceleration of vesting under any of the Options. You acknowledge and agree that, other than as set forth in Section 6 (and under the conditions set forth therein), you are not entitled to, or eligible for, any
further bonus payment of any kind. 
 8.    Eligibility. Your eligibility for the Termination
Consideration is conditioned on (a) you having resigned from the Board and from all positions that you are then serving as a director, officer or in another similar capacity at the Company’s direct and indirect subsidiaries and
(b) you having first signed a release agreement in substantially the form attached as Attachment B, which may be adjusted by the Company in its discretion for changes in applicable laws, rules or regulations or customary practice (the
“Release”) and such Release becoming effective pursuant to its terms no later than sixty (60) days following the date of termination of your employment (the “Release Deadline”). If the Release does not become
effective and irrevocable by the Release Deadline, you forfeit any rights to the Termination Consideration. In no event will any Termination Consideration be paid under this this Agreement until the Release becomes effective and irrevocable
and the Termination Consideration will commence or be provided once the Release becomes effective and irrevocable. You agree that the Company shall have a right of offset against the foregoing for amounts owed to the Company by you (unless
the amounts owed are subject to a good faith dispute) to the fullest extent not prohibited by law. The Termination Consideration shall be in lieu of any other severance payments, severance benefits, and severance protections to which you may be
entitled under the Employment Agreement (including the Severance Benefits) or any severance or termination policy, plan, program, practice or arrangement of the Company and its affiliates. 

  
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 9.    Withholding. All amounts payable under this
Transition Agreement shall be paid less all applicable state and federal tax withholdings and any other withholdings required by any applicable jurisdiction or authorized by you. You acknowledge and agree that other than (a) payment of salary
and wages through the Resignation Date (the “Remaining Employment Compensation”) and (b) subject to the terms and conditions hereof and the payments and benefits set forth herein: (i) you have been timely paid all of your
wages through the date hereof and, assuming the payment of the Remaining Employment Compensation, you will have been timely paid all of your wages earned through the Resignation Date, (ii) prior to the execution of this Transition Agreement,
except for the Remaining Employment Compensation and standard employee benefits through the Resignation Date, you were not entitled to receive (or if entitled to receive, hereby waive, release and forever discharge) any further payments, equity
grants, perks or benefits from the Company or any of its subsidiaries or affiliates and (iii) you are not entitled to (or if entitled, hereby waive, release and forever discharge) any further payments, equity grants, perks or benefits from the
Company or any of its subsidiaries or affiliates after the Resignation Date (including, without limitation, under the Employment Agreement), except as set forth in this Transition Agreement and the Independent Contractor Services Agreement. You
agree that you did not suffer an injury covered by workers’ compensation in the course and scope of your employment with the Company. You agree that, except as provided in this Transition Agreement, you are not and will not be entitled to any
severance or acceleration benefits, including, without limitation, under the Option Agreements and the Employment Agreement, as a result of your resignation. 

10.    Section 409A. It is intended that the terms of this Transition Agreement comply with
Section 409A of the Internal Revenue Code of 1986, as amended, the final regulations and any guidance promulgated thereunder (collectively, “Section 409A”) or an exemption therefrom, and the terms of this
Transition Agreement will be interpreted accordingly; provided, however, that the Company, its affiliates, and their respective employees, officers, directors, agents and representatives (including, without limitation, legal counsel) will not have
any liability to you with respect to any taxes, penalties, interest or other costs or expenses you or any related party may incur with respect to or as a result of Section 409A or for damages for failing to comply with Section 409A.
Notwithstanding any provision to the contrary in this Transition Agreement, with respect to any amounts under this Transition Agreement that are determined to be deferred compensation for purposes of Section 409A and payable as a result of your
termination of employment, you shall not be deemed to have terminated employment unless and until you have experienced a “separation from service” (as that term is used in Section 409A). Payments pursuant to this Transition Agreement
are intended to constitute separate payments for purposes of Section 409A. To the extent you are a “specified employee,” as defined in Section 409A and any elections made by the Company in accordance therewith, notwithstanding
the timing of payment provided in any other section of this Transition Agreement, to the extent required by Section 409A, no payment, distribution or benefit under this Transition Agreement that constitutes a distribution of deferred
compensation (within the meaning of Section 409A) upon “separation from service” (as that term is used in Section 409A), after taking into account all available exemptions, that would otherwise be payable, distributable or
settled during the six (6) month period after separation from service, will be made during such six (6) month period, and any such payment, distribution or benefit will instead be paid on the first business day after such six
(6) month period, provided, however, that if you die following the date of termination and prior to the payment, distribution, settlement or provision of any payments, distributions or benefits delayed on account of Section 409A, such
payments, distributions or benefits shall be paid or provided to the personal representative of your estate within thirty (30) days after the date of your death. To the extent that the payment of any amount hereunder constitutes
“nonqualified deferred compensation” for purposes of Section 409A, if the applicable sixty (60) day period described in either Section 6 or Section 8 above spans calendar years, the payments will be made in the second
calendar year. Any reimbursements or in-kind benefits provided to or for your benefit that constitute deferred compensation for purposes of Section 409A shall be provided in a manner that complies with
Section 409A. Accordingly, (a) all such reimbursements will be made not later than the last day of the calendar year after the calendar year in which the expenses 

  
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were incurred, (b) any right to such reimbursements or in-kind benefits will not be subject to liquidation or exchange for another benefit, and
(c) the amount of the expenses eligible for reimbursement, or the amount of any in-kind benefit provided, during any taxable year will not affect the amount of expenses eligible for reimbursement, or the in-kind benefits provided, in any other taxable year. 
 11.    Release.
In exchange for the agreements contained in this Transition Agreement, which you acknowledge exceeds any amounts to which you otherwise may be entitled under the Company’s policies and practices or applicable law, you on behalf of yourself
and your heirs, executors, representatives and assigns, hereby fully acquits, releases, waives and discharges from and agree that you have not and will not file, cause to be filed or pursue against, the Company, its affiliates, related parties,
parent or subsidiary companies, and its and their present and former directors, officers, employees, agents, committee members, attorneys and representatives, and each of the foregoing’s successors and assigns (including, without limitation,
Parent) (the “Released Parties”) all claims obligations, liabilities, complaints, causes of action, charges, debts, and demands of any kind, known and unknown, in law or in equity, asserted or unasserted (“Claims”)
which you may now have or have ever had against any of them, or arising out of your relationship with any of them, including all claims for compensation and bonuses, attorneys’ fees, and all claims arising from your employment with the Company
or the termination of your employment, whether based on contract, tort, statute, local ordinance, rule, regulation or any comparable law in any jurisdiction (“Released Claims”). 

Released Claims include, but are not limited to: 

(i) all Claims arising from your employment with the Company or the termination of that employment, including Claims for wrongful termination
or retaliation and the terms and conditions of employment; 
 (ii) all Claims related to your compensation or benefits from the Company,
including salary, wages, bonuses, commissions, incentive compensation, profit sharing, retirement benefits, paid time off, vacation, sick leave, leaves of absence, expense reimbursements, equity, severance pay, and fringe benefits; 

(iii) all Claims for breach of contract, breach of quasi-contract, promissory estoppel, detrimental reliance, and breach of the implied
covenant of good faith and fair dealing; 
 (iv) all tort Claims, including Claims for fraud, defamation, slander, libel, disparagement,
negligent or intentional infliction of emotional distress, personal injury, negligence, compensatory or punitive damages, negligent or intentional misrepresentation, and discharge in violation of public policy; 

(v) all federal, state, and local statutory Claims, including Claims for discrimination, harassment, retaliation, attorneys’ fees, medical
expenses, experts’ fees, costs and disbursements; and 
 (vi) any other Claims of any kind whatsoever, from the beginning of time until
the date you sign this Transition Agreement, in each case whether based on contract, tort, statute, local ordinance, rule, regulation or any comparable law, public policy or common law in any jurisdiction. 

By way of example and not limitation, Released Claims shall include any Claims arising under Title VII of the Civil Rights Act of 1964, 42 U.S.C. § 2000e
et seq.; the Civil Rights Act of 1991; the Civil Rights Acts of 1866 and/or 1871, 42 U.S.C. Section 1981; the Americans with Disabilities Act, 42 U.S.C. 12101 et seq., the Age Discrimination in Employment Act (“ADEA”), 29
U.S.C. § 621 et seq.; the Family Medical Leave Act, 29 U.S.C. § 2601 et seq.; the Employee Retirement Income Security Act of 1974, 29 U.S.C. § 1001 et seq.; the federal Worker Adjustment Retraining Notification Act, 29 U.S.C. §
2102 et seq., the California 

  
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WARN Act, California Labor Code § 1400 et seq., the California Fair Employment and Housing Act, Cal. Gov. Code §12900 et seq., the California Labor Code, and the orders of the
California Industrial Welfare Commission. The parties intend for this release to be enforced to the fullest extent permitted by law. You understand that you are not waiving any right or Claim that cannot be waived as a matter of law, such as
workers’ compensation Claims, Claims for indemnification under California Labor Code Section 2802, Claims for unemployment insurance benefits, your right to vested equity or other vested benefits, or as otherwise set forth in this
Transition Agreement. YOU UNDERSTAND AND AGREE THAT THIS TRANSITION AGREEMENT CONTAINS A GENERAL RELEASE OF ALL CLAIMS. 

12.    ADEA. You further specifically unconditionally release and forever discharge the Released Parties
from any and all Claims that you may have as of the date you sign this Transition Agreement arising under the ADEA. By signing this Transition Agreement, you acknowledge and confirm that: (a) you have been advised by the Company to consult with
an attorney of your choice before signing this Transition Agreement; (b) you were given no fewer than twenty-one (21) days to consider the terms of this Transition Agreement, although you may sign it
sooner if desired; (c) you are providing this release in exchange for consideration in addition to that which you are already entitled; (d) you have seven (7) days from the date of signing this Transition Agreement to revoke this
Transition Agreement by providing the Company with a written notice of revocation to the Company’s Chairman of the Board at the Company’s principal executive office located at 200 Constitution Drive, Menlo Park, CA 94025, before the end of
such seven-day period (“Revocation Period”); (e) this Transition Agreement will not become effective, and you will not be entitled to the benefits of this Transition Agreement, until the
Revocation Period passes without you revoking this Transition Agreement; (f) the release contained in this paragraph does not apply to rights and claims that may arise after the date on which you sign this Transition Agreement, and (g) you
knowingly and voluntarily accept the terms of this Transition Agreement. You further agree that any change to this Transition Agreement, whether material or immaterial, will not restart the twenty-one
(21) day period for you to consider the terms of this Transition Agreement. 
 13.    Section 1542.
You further agree that because this release specifically covers known and unknown claims, you waive your rights under Section 1542 of the California Civil Code, or under any comparable law of any other jurisdiction. Section 1542
states: 
 A GENERAL RELEASE DOES NOT EXTEND TO CLAIMS THAT THE CREDITOR OR RELEASING PARTY DOES NOT KNOW OR SUSPECT TO EXIST IN HIS OR
HER FAVOR AT THE TIME OF EXECUTING THE RELEASE AND THAT, IF KNOWN BY HIM OR HER, WOULD HAVE MATERIALLY AFFECTED HIS OR HER SETTLEMENT WITH THE DEBTOR OR RELEASED PARTY. 

You intend for this release to be enforced to the fullest extent permitted by law. Notwithstanding the foregoing, you acknowledge and agree that you are not
waiving or being required to waive any right that cannot be waived as a matter of law, including the right to file a charge, report an alleged violation of law or participate in an investigation by a governmental administrative agency, including
your ability to file a charge or complaint with the Equal Employment Opportunity Commission, the National Labor Relations Board, the Occupational Safety and Health Administration, the Securities and Exchange Commission or any other federal, state or
local government agency or commission (“Government Agencies”). You further understand that this General Release Agreement does not limit your ability to communicate with any Government Agencies or otherwise participate in any
investigation or proceeding that may be conducted by any Government Agency, including providing documents or other information, without notice to the Company; provided, however, that you hereby disclaim and waive any right to share or participate in
any monetary award resulting from the prosecution of such charge, report or investigation, except that you may receive and fully retain a monetary award from a government-administered whistleblower award program for providing information directly to
a government agency. This General Release does not release any rights you may have pursuant to this Transition Agreement or Independent Contractor Services Agreement. 

  
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 14.    Confidentiality. You further agree to maintain this
Transition Agreement and its contents in the strictest confidence and agree that you will not disclose the terms of this Transition Agreement to any third party (other than your legal and financial advisors) without the prior written consent of the
Company, unless otherwise required by law. If you are obligated under law to disclose the contents of this Transition Agreement, you agree, to the extent possible, to provide the Company at least five (5) days prior written notice of such
obligation. You also agree that during your continued services with the Company and for five (5) years thereafter, you will not make or publish, either orally or in writing, any disparaging statement regarding any Released Parties. The Company
agrees that during such period it shall instruct its executive officers and directors to refrain from making or publishing, either orally or in writing, any disparaging statements concerning you to any third parties; provided, however, that the
Company shall be permitted to (a) respond truthfully to reference requests from your potential future employers, and (b) disclose the reasons for your departure to current and prospective equityholders, officers, directors, investors,
financing sources, underwriters, acquirors, strategic partners or any representative or affiliate or the foregoing, and both parties may make disclosures necessary or advisable to comply with applicable law, rule, regulation, securities exchange
requirement or court order. The parties further agree that you will refer any third party reference requests to the Company’s Chief Human Resources Officer or the then highest ranking human resources employee, who will respond by confirming
dates of employment and last position held. 
 15.    Cooperation. You agree to use reasonable efforts to
cooperate with the Company in connection with any business matters in which you were involved or any existing or potential claims, investigations, administrative proceedings, lawsuits or other legal and business matters which arose during your
employment or thereafter as part of the Services or involving matters of which you have knowledge due to your position as Chief Executive Officer, President, Treasurer or Secretary. This includes being available to provide information or explain
documents as requested by the Company and its counsel as well as disclosing to the Company and its counsel any facts you know which might be relevant and cooperating fully so as to enable the Company and its counsel to present any claim or defense
which it may have relating to such matters. In addition, you agree not to counsel or assist any attorneys or their clients in the presentation or prosecution of any disputes, differences, grievances, claims, charges or complaints by any third party
against the Company, unless under subpoena or other court or administrative order or legal process to do so. 

16.    Right to Disclose. Notwithstanding any other provision of this Transition Agreement to the contrary,
you have the right to (a) disclose in confidence trade secrets to federal, state, and local government officials, or to an attorney, for the sole purpose of reporting or investigating a suspected violation of the law or (b) disclose trade
secrets in a document filed in a lawsuit or other proceeding so long as that filing is made under seal and protected from public disclosure. Nothing in this Transition Agreement is intended to conflict with 18 U.S.C. § 1833(b) or create
liability for disclosures of trade secrets that are expressly allowed by 18 U.S.C. § 1833(b). 

17.    Proprietary Information. You agree that, notwithstanding any other provision of this Transition
Agreement to the contrary and without limiting in any manner the Proprietary Information Agreement, as a precondition of your eligibility for and receipt of the Consideration, you shall return to the Company all Company documents (and all copies
thereof) and other Company property that you have had in your possession at any time, including, but not limited to, CD’s, electronic files and/or storage devices, presentations; Company files, notes, drawings, records, business plans and
forecasts, financial information, specifications, computer-recorded information, tangible property (including, but not limited to, computers, phones, credit cards, entry cards, identification badges and building and desk keys); and, any materials of

  
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any kind that contain or embody any proprietary or confidential information of the Company (and all reproductions thereof). You shall retain no copies of Company records after the date hereof.
Any such records have been or will be returned to Company. 
 18.    Arbitration. You and the Company
further agree that the sole remedy for any and all disputes arising out of or based on the terms, interpretation, application, or alleged breach of this Transition Agreement, including any of the Released Claims, shall be binding arbitration, which
shall be conducted in San Mateo County, California, before a single arbitrator, in accordance with the then applicable rules of the Judicial Arbitration and Mediation Service (“JAMS”) or by a
non-JAMS process to which the parties may otherwise agree. By agreeing to arbitrate, the parties are waiving their respective rights to a jury trial with regard to any of the
above-referenced claims. 
 19.    Entire Agreement. This
Transition Agreement constitutes the entire agreement and understanding between you and the Company concerning its subject matter, replaces and supersedes any and all prior agreements and understandings between us (other than the Proprietary
Information Agreement, which shall remain in full force and effect), and may only be amended in writing signed by you and an authorized representative of the Company, and that, except for the Proprietary Information Agreement and the Independent
Contractor Services Agreement, and except as otherwise expressly provided in this Transition Agreement, this Transition Agreement renders null and void any and all prior or contemporaneous representations, warranties or agreements between you and
the Company or any affiliate of the Company. It is agreed that this Transition Agreement shall be governed by the laws of the State of California. If any provision of this Transition Agreement or the application thereof to any person, place, or
circumstance shall be held by a court of competent jurisdiction or arbitrator to be invalid, unenforceable, or void, the remainder of this Transition Agreement and such provision as applied to other person, places, and circumstances shall remain in
full force and effect. You understand and agree that this Transition Agreement is not an admission of guilt or wrongdoing by the Company and that the Company does not believe or admit that it has done anything wrong. 

20.    Acknowledgement. Finally, by your signature below, you acknowledge each of the following:
(a) that you have read this Transition Agreement or have been afforded every opportunity to do so; (b) that you are fully aware of this Transition Agreement’s contents and legal effect; (c) that you have reviewed, or have had the
opportunity to review, this Transition Agreement with legal counsel of your choosing; and (d) that you have chosen to enter into this Transition Agreement freely, without coercion and based upon your own judgment and not in reliance upon any
promises made by Company other than those contained in this Transition Agreement. 

21.    Conditionality. Each party acknowledges and agrees that this Transition Agreement shall terminate in
its entirety and be of no further force and effect if the Merger Agreement is: (a) not entered into prior to June 30, 2020 or (b) entered into and subsequently terminated prior to the Closing occurring. 

[Remainder of Page Left Intentionally Blank] 

  
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 To accept this Transition Agreement, please sign and date this Transition Agreement and return it to me.
Please indicate your agreement with the above terms by signing below. 
  

			
	Sincerely,
	
	Adicet Bio Inc.
		
	By:	 	 /s/ Donald Santel

	Name:	 	Donald Santel
	Title:	 	Executive Chairman
	
	Address for Notices:
	
	200 Constitution Drive
	Menlo Park, CA 94025

 My agreement with the terms of this Transition Agreement is signified by my signature below. I confirm and acknowledge
that I am not entitled to any severance under my Employment Agreement. Furthermore, I acknowledge that I have read and understand this Transition Agreement and that I sign this release of all claims voluntarily, with full appreciation that at no
time in the future may I pursue any of the rights I have waived in this Transition Agreement. 
  

									
	Signed	 	 /s/ Anil Singhal
	 		 	Dated: April 28, 2020
		 	Anil Singhal	 		 		 	

 Address for Notices: 
  

			
	Attachment A:	  	Independent Contractor Services Agreement
	Attachment B:	  	Form of Release

 ATTACHMENT A 

INDEPENDENT CONTRACTOR SERVICES AGREEMENT 

[See Attached] 

 ATTACHMENT B 

FORM OF RELEASE 

[See Attached] 

 GENERAL RELEASE AGREEMENT 

This General Release Agreement is executed by Anil Singhal (“you”), in accordance with your Transition Agreement, dated as of
April 28, 2020, by and between you and Adicet Bio, Inc. (the “Company”), as amended, modified or restated from time to time (the “Transition Agreement”). Capitalized terms used but not otherwise defined herein
shall have the meanings set forth in the Transition Agreement. 
 In accordance with the Transition Agreement, and in exchange for the Termination
Consideration, which you acknowledge exceeds any amounts to which you otherwise may be entitled under the Company’s policies and practices or applicable law, you on behalf of yourself and your heirs, executors, representatives and assigns,
hereby fully acquits, releases, waives and discharges from and agree that you have not and will not file, cause to be filed or pursue against, the Company, its affiliates, related, parent or subsidiary companies, and its and their present and former
directors, officers, employees, agents, committee members, attorneys and representatives, and each of the foregoing’s successors and assigns (including, without limitation, Parent) (the “Released Parties”) all claims
obligations, liabilities, complaints, causes of action, charges, debts, and demands of any kind, known and unknown, in law or in equity, asserted or unasserted (“Claims”) which you may now have or have ever had against any of them,
or arising out of your relationship with any of them, including all claims for compensation and bonuses, attorneys’ fees, and all claims arising from your employment with the Company or the termination of your employment, whether based on
contract, tort, statute, local ordinance, rule, regulation or any comparable law in any jurisdiction (“Released Claims”). 
 Released
Claims include, but are not limited to: 
 (i) all Claims arising from your employment with the Company or the termination of that
employment, including Claims for wrongful termination or retaliation and the terms and conditions of employment; 
 (ii) all Claims related
to your compensation or benefits from the Company, including salary, wages, bonuses, commissions, incentive compensation, profit sharing, retirement benefits, paid time off, vacation, sick leave, leaves of absence, expense reimbursements, equity,
severance pay, and fringe benefits; 
 (iii) all Claims for breach of contract, breach of quasi-contract, promissory estoppel, detrimental
reliance, and breach of the implied covenant of good faith and fair dealing; 
 (iv) all tort Claims, including Claims for fraud, defamation,
slander, libel, disparagement, negligent or intentional infliction of emotional distress, personal injury, negligence, compensatory or punitive damages, negligent or intentional misrepresentation, and discharge in violation of public policy; 

(v) all federal, state, and local statutory Claims, including Claims for discrimination, harassment, retaliation, attorneys’ fees, medical
expenses, experts’ fees, costs and disbursements; and 
 (vi) any other Claims of any kind whatsoever, from the beginning of time until
the date you sign this General Release Agreement, in each case whether based on contract, tort, statute, local ordinance, rule, regulation or any comparable law, public policy or common law in any jurisdiction. 

By way of example and not limitation, Released Claims shall include any Claims arising under Title VII of the Civil Rights Act of 1964, 42 U.S.C. § 2000e
et seq.; the Civil Rights Act of 1991; the Civil Rights Acts of 1866 and/or 1871, 42 U.S.C. Section 1981; the Americans with Disabilities Act, 42 U.S.C. 12101 et seq., the Age Discrimination in Employment Act (“ADEA”), 29
U.S.C. § 621 et seq.; the Family Medical Leave 

 
Act, 29 U.S.C. § 2601 et seq.; the Employee Retirement Income Security Act of 1974, 29 U.S.C. § 1001 et seq.; the federal Worker Adjustment Retraining Notification Act, 29 U.S.C. §
2102 et seq., the California WARN Act, California Labor Code § 1400 et seq., the California Fair Employment and Housing Act, Cal. Gov. Code §12900 et seq., the California Labor Code, and the orders of the California Industrial Welfare
Commission. The parties intend for this release to be enforced to the fullest extent permitted by law. You understand that you are not waiving any right or Claim that cannot be waived as a matter of law, such as workers’ compensation Claims,
Claims for indemnification under California Labor Code Section 2802, Claims for unemployment insurance benefits, your right to vested equity or other vested benefits, or as otherwise set forth in this General Release Agreement. YOU UNDERSTAND
AND AGREE THAT THIS GENERAL RELEASE AGREEMENT CONTAINS A GENERAL RELEASE OF ALL CLAIMS. 
 You further agree that because this release specifically covers
known and unknown claims, you waive your rights under Section 1542 of the California Civil Code, or under any comparable law of any other jurisdiction. Section 1542 states: 

A GENERAL RELEASE DOES NOT EXTEND TO CLAIMS THAT THE CREDITOR OR RELEASING PARTY DOES NOT KNOW OR SUSPECT TO EXIST IN HIS OR HER FAVOR AT
THE TIME OF EXECUTING THE RELEASE AND THAT, IF KNOWN BY HIM OR HER, WOULD HAVE MATERIALLY AFFECTED HIS OR HER SETTLEMENT WITH THE DEBTOR OR RELEASED PARTY. 

You intend for this release to be enforced to the fullest extent permitted by law. Notwithstanding the foregoing, you acknowledge and agree that you are not
waiving or being required to waive any right that cannot be waived as a matter of law, including the right to file a charge, report an alleged violation of law or participate in an investigation by a governmental administrative agency, including
your ability to file a charge or complaint with the Equal Employment Opportunity Commission, the National Labor Relations Board, the Occupational Safety and Health Administration, the Securities and Exchange Commission or any other federal, state or
local government agency or commission (“Government Agencies”). You further understand that this General Release Agreement does not limit your ability to communicate with any Government Agencies or otherwise participate in any
investigation or proceeding that may be conducted by any Government Agency, including providing documents or other information, without notice to the Company; provided, however, that you hereby disclaim and waive any right to share or participate in
any monetary award resulting from the prosecution of such charge, report or investigation, except that you may receive and fully retain a monetary award from a government-administered whistleblower award program for providing information directly to
a government agency. This General Release does not release any rights you may have pursuant to the Transition Agreement or Independent Contractor Services Agreement. 

You further specifically unconditionally release and forever discharge the Released Parties from any and all Claims that you may have as of the date you sign
this General Release Agreement arising under the ADEA. By signing this General Release Agreement, you acknowledge and confirm that: (i) you have been advised by the Company to consult with an attorney of your choice before signing this General
Release Agreement; (ii) you were given no fewer than [twenty-one (21) or forty-five (45)] days to consider the terms of this General Release Agreement, although you may sign it sooner if desired;
(iii) you are providing this release in exchange for consideration in addition to that which you are already entitled; (iv) you have seven (7) days from the date of signing this General Release Agreement to revoke this General Release
Agreement by providing the Company with a written notice of revocation to the current [Chairman of the Board of Directors of the Company] at the Company’s principal executive office located at [LOCATION], before the end of such seven-day period (“Revocation Period”); (v) this General Release Agreement will not become effective, and you will not be entitled to any Termination Consideration, until the Revocation Period
passes without you revoking this General Release Agreement; (vi) the release contained in this 

 
paragraph does not apply to rights and claims that may arise after the date on which you sign this General Release Agreement, and (vii) you knowingly and voluntarily accept the terms of this
General Release Agreement. You further agree that any change to this General Release Agreement, whether material or immaterial, will not restart the [twenty-one (21) or forty-five (45)] day period for you
to consider the terms of this General Release Agreement. 
 You affirm that you have not initiated, filed or caused to be filed and agree not to initiate,
file or cause to be filed any Released Claims against any of the Released Parties. You further agree not to encourage any person, including any current or former Company employee, to file any kind of claim whatsoever against the Released Parties, or
any of them, and not to solicit, assist, support or in any way cooperate in the initiation or prosecution of any action or proceeding brought against the Released Parties, or any of them, by a third party, except if compelled to do so by legal
process which includes when compelled by court order, subpoena or written request by an administrative agency or the legislature to testify regarding alleged criminal conduct or alleged sexual harassment. 

Notwithstanding anything to the contrary in this General Release Agreement, nothing in this General Release Agreement shall prohibit or interfere with you
exercising protected rights to file a charge with or report to any Governmental Agency. You do not need the Company’s advance permission to file any such charge or report or to participate in any such investigation. You do, however, waive any
right to receive any monetary award or benefit resulting from such a charge, report, or investigation related to any Released Claims, except that you may receive and fully retain a monetary award from a government-administered whistleblower award
program. You further acknowledge and agree that this General Release Agreement shall not be construed as a waiver of any rights that are not subject to waiver by private agreement or otherwise cannot be waived as a matter of law. 

You represent and warrant that you have returned to the Company—and have not retained any copies of—all Company property, including, without
limitation, all documents and data in whatever form maintained, confidential information, computer hardware or software, files, papers, memoranda, correspondence, client lists, employee information, financial records and information, credit cards,
keys, access cards, tape recordings, pictures and any other items of any nature which were or are the property of the Company. You understand that you will not be eligible for any Termination Consideration, until you return all Company property.

 You agree to reasonably cooperate with the Company in any pending or future litigation and/or administrative investigation in which the Company is a
party and/or is the subject of an administrative investigation where you have relevant knowledge or information. 
 You agree that the Transition Agreement
and this General Release Agreement contain all of the agreements and understandings between you and the Company with respect to their subject matter, and may not be contradicted by evidence of any prior or contemporaneous agreement; provided,
however, that, the Proprietary Information Agreement shall not be modified in any way by this General Release Agreement and shall continue in full force and effect in accordance with its terms. This General Release Agreement shall be governed by the
laws of the State of California. If any provision of this General Release Agreement or its application to any person, place, or circumstance is held by a court of competent jurisdiction to be invalid, unenforceable, or void, the remainder of this
General Release Agreement and such provision as applied to other person, places, and circumstances will remain in full force and effect. Nothing in this General Release Agreement shall be construed as an admission by any party of any wrongdoing,
violation of the Company’s policies or procedures, or violations of any federal, state or local law. 
 Finally, by your signature below, you
acknowledge each of the following: (a) you have read this General Release Agreement or have been afforded every opportunity to do so; (b) you are fully aware of this General 

 
Release Agreement’s contents and legal effect; (c) you have reviewed, or have had the opportunity to review, this General Release Agreement with legal counsel of your choosing; and
(d) you have chosen to enter into this General Release Agreement freely, without coercion and based upon your own judgment and not in reliance upon any promises made by the Company other than those contained in this General Release Agreement.

 Please note that this General Release Agreement may be signed no earlier than your last date of employment with the Company, and that your eligibility
for any Termination Consideration, is conditioned upon meeting the terms set forth in the Transition Agreement. 
  

									
	  
	 	 	 	 	 	Date:	 	                                     
           
	Anil SinghalEX-10.10

 Exhibit 10.10 

INDEPENDENT CONTRACTOR SERVICES AGREEMENT 

THIS INDEPENDENT CONTRACTOR SERVICES AGREEMENT (this “Agreement”) effective as of April 28, 2020 (the “Effective
Date”), is entered into between Adicet Bio, Inc., a Delaware corporation (“Adicet”), and Anil Singhal (“Contractor”). The parties hereby agree as follows: 

1.    Engagement for Services. Subject to and contingent upon Contractor providing services as an employee of
Adicet through the Resignation Date and the Closing occurring (each as defined in that certain letter agreement, dated on or about the date hereof, by and between Contractor and Adicet, as amended, modified or restated from time to time (the
“Transition Agreement”)), Adicet hereby engages Contractor to perform the services (the “Services”) described on Exhibit A on the terms and conditions of this Agreement from and after the
Resignation Date (the “Start Date”). Contractor hereby accepts such engagement, and shall perform the Services and otherwise act in strict accordance with the terms and conditions of this Agreement. Contractor shall comply with all
applicable Adicet policies and procedures in the performance of the Services. Contractor shall perform the Services in accordance with all applicable laws, regulations and the highest professional industry standards. Except as otherwise provided
herein, Adicet shall not control the manner or means by which Contractor performs the Services. 
 2.    Place of
Work. Contractor is generally free to perform Contractor’s Services at a location of Contractor’s choosing. Contractor understands that the Services must coordinate with Adicet’s established protocols and security requirements and
may from time to time need to be performed at Adicet’s premises. 
 3.    Compensation. Adicet shall pay
Contractor the compensation set forth in Exhibit A in accordance with the payment schedule set forth therein. If provided for in Exhibit A, Adicet shall reimburse Contractor’s reasonable
expenses in accordance with, and subject to the terms and conditions set forth on, Exhibit A. Upon termination of this Agreement for any reason, Contractor shall be (a) paid fees on the basis set forth in
Exhibit A and (b) reimbursed only for expenses that are incurred prior to termination of this Agreement and in accordance with this Agreement. 

4.    Disclosure and Assignment of Work Product. 

4.1    Work Product. “Work Product” shall mean all (a) deliverables, discoveries, inventions,
designs, processes, formulae, developments, improvements, works of authorship, results, information, data, know-how, ideas, concepts, technology or intellectual property (in each case, whether or not
protectable under patent, copyright or trade secret laws) and (b) patent rights, copyrights, trade secret rights, mask work rights, trademark rights, trade names, trade dress, trade secret rights, sui generis database rights and all other
intellectual property rights of any sort throughout the world, in each case of any of the foregoing in (a) or (b), conceived, created, generated, made, derived, developed or reduced to practice, whether directly or indirectly or solely or
jointly with others, from, using, or in connection with (i) the performance of the Services or (ii) any Confidential Information (as defined below). 

4.2    Disclosure and Assignment of Work Product. Contractor shall maintain adequate and current records of all
Work Product, which records shall be and remain the property of Adicet. Contractor shall promptly disclose and describe to Adicet all Work Product. Contractor shall, and hereby does, assign to Adicet, or Adicet’s designee, all of
Contractor’s right, title and interest in and to any and all Work Product, all associated records, and all intellectual property rights therein and thereto. Contractor retains no rights to use the Work Product. 

4.3    Further Assistance. Contractor shall perform, during and after the term of this Agreement, all acts that
Adicet deems necessary or desirable to permit and assist Adicet in obtaining, 

  
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perfecting and enforcing the full benefits, enjoyment, rights and title throughout the world in the Work Product. Such assistance shall include, without limitation, the maintenance of adequate
and current records of any and all Work Product, the disclosure of all pertinent information and data relating to Work Product, the execution of all applications, specifications, oaths, and assignments, and all other instruments and papers that
Adicet shall deem necessary to apply for and to assign or convey to Adicet, its successors, and assigns or nominees, the sole and exclusive right, title, and interest in such Work Product. If Adicet is unable for any reason to secure
Contractor’s signature to any document required to file, prosecute, register, enforce or memorialize the assignment of any rights under any Work Product, Contractor hereby irrevocably designates and appoints Adicet as Contractor’s agent
and attorney-in-fact to act for and on Contractor’s behalf and instead of Contractor to take all lawfully permitted acts to further the filing, prosecution,
registration, memorialization of assignment, issuance and enforcement of rights under such Work Product, all with the same legal force and effect as if executed by Contractor. The foregoing is deemed a power coupled with an interest and is
irrevocable. 
 4.4    License. To the extent any of the rights, title and interest in and to any Work Product
cannot be assigned by Contractor to Adicet, Contractor hereby unconditionally and irrevocably grants to Adicet and Adicet’s designees and successors in interest an exclusive (even as to Contractor), royalty-free, transferable, irrevocable,
perpetual, worldwide, fully paid-up license (with rights to sublicense through multiple tiers of sublicensees) to use, reproduce, distribute, display and perform (whether publicly or otherwise), prepare
derivative works of and otherwise modify, make, sell, offer to sell, import and otherwise use and exploit (and have others exercise such rights on behalf of Adicet) all or any portion of such non-assignable
rights, title and interest, in each case in any medium or format, whether now known or later developed, and in each case without notice to, the consent of, or accounting to Contractor. To the extent any of the rights, title and interest in and to
any Work Product can neither be assigned nor licensed by Contractor to Adicet, Contractor hereby unconditionally and irrevocably waives and agrees never to assert such non-assignable and non-licensable rights, title and interest, and any associated claims or causes of action, against Adicet or any of Adicet’s designees or successors in interest. Contractor further waives any “moral”
rights or other rights with respect to attribution of authorship or integrity of such Work Product that Contractor may have under any applicable law, whether under copyright, trademark, unfair competition, defamation, right of privacy, contract,
tort or other legal theory. 

4.5    Out-of-Scope Innovations.
Contractor agrees not to use or incorporate into any Work Product any confidential or proprietary information, technology or intellectual property conceived, created, generated, made, derived, developed or reduced to practice (a) by Contractor
other than in the course of performing the Services or (b) by any third party (collectively, the “Out-of-Scope Innovations”). To the extent
Contractor uses, incorporates or permits to be incorporated into any Work Product any Out-of-Scope Innovations, then Contractor hereby grants to Adicet and Adicet’s
designees and successors in interest a non-exclusive, royalty-free, transferable, irrevocable, perpetual, worldwide, fully paid-up license (with rights to sublicense
through multiple tiers of sublicensees) to use, reproduce, distribute, display and perform (whether publicly or otherwise), prepare derivative works of and otherwise modify, make, sell, offer to sell, import and otherwise use and exploit (and have
others exercise such rights on behalf of Adicet) all or any portion of such Out-of-Scope Innovations, in each case in any medium or format, whether now known or later
developed, and without notice to, the consent of, or accounting to Contractor. To the extent any of the rights, title and interest in and to any Out-of-Scope Innovations
cannot be licensed by Contractor to Adicet, Contractor hereby unconditionally and irrevocably waives and agrees never to assert such non-licensable rights, title and interest, and any associated claims or
causes of action, against Adicet or any of Adicet’s designee or successors in interest. 

  
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 5.    Confidentiality. 

5.1    Confidential Information. “Confidential Information” shall mean (a) any and all data
and information (and all tangible and intangible embodiments thereof), whether or not marked or identified as confidential or proprietary, of any type whatsoever, whether in writing, or in oral, graphic, electronic or any other form, related to
Adicet, its technology, intellectual property, contracts, business relationships, products, product candidates, employees, business, assets, finances, operations or opportunities and/or the Services, (b) all Work Product and all associated
records, (c) the existence of this Agreement and the nature and scope of the Services, the terms and conditions hereof and thereof, and the performance of the Services, and (d) any other data or information (and all tangible and intangible
embodiments thereof), including any trade secrets, that may be provided, made accessible or made known to, Contractor from or in connection with the performance of the Services, including, without limitation, any such information that Adicet has
received from others that Adicet is obligated to treat as confidential or proprietary. Notwithstanding the foregoing, Confidential Information shall not include (i) information that is or becomes publicly known through lawful means through no
act or omission of Contractor; (ii) information that was rightfully known by Contractor without confidential or proprietary restriction before receipt from Adicet, as evidenced by Contractor’s contemporaneous written records; or
(iii) information that is disclosed to Contractor without restriction by a third party who rightfully possesses the information and does not owe a duty of confidentiality to Adicet with respect to such information. 

5.2    Nondisclosure and Nonuse. Except as permitted in this Section 5, Contractor shall maintain in
confidence and not, directly or indirectly, use, disseminate or in any way disclose the Confidential Information to any third party, other than Adicet. Contractor may use the Confidential Information solely to perform the Services for the sole and
exclusive benefit of Adicet and for no other purpose. Contractor shall treat all Confidential Information with the same degree of care as Contractor accords to Contractor’s own confidential information, but in no case shall Contractor use less
than reasonable care. Contractor shall immediately give notice to Adicet of any unauthorized use or disclosure of the Confidential Information. Contractor shall assist Adicet in remedying any such unauthorized use or disclosure of the Confidential
Information. 
 5.3    Permitted Disclosure. Contractor’s nondisclosure obligations under Section 5.2
shall not apply to the extent that Contractor is required to disclose information by applicable law, regulation or order of a governmental agency or a court of competent jurisdiction; provided, however, that Contractor shall provide advanced written
notice thereof to Adicet, consult with Adicet with respect to such disclosure and provide Adicet sufficient opportunity to object to any such disclosure or to request confidential treatment thereof (if applicable) and reasonably cooperate with
Adicet in objecting to or narrowing the scope of such disclosure and/or obtaining a protective order or confidential treatment of such disclosure. 

5.4    Ownership and Return of Confidential Information and Adicet Property. All Confidential
Information and any materials (including, without limitation, documents, drawings, papers, media, tapes, models, apparatus, sketches, designs and lists) relating thereto, as well as any other materials furnished by Adicet to Contractor in connection
with this Agreement, and any copies or derivatives thereof (collectively, the “Adicet Property”), are and shall remain the sole and exclusive property of Adicet. Within five (5) days after any request by Adicet,
Contractor shall destroy or deliver to Adicet, at Adicet’s option, (a) all Adicet Property and (b) all materials in Contractor’s possession or control that contain or disclose any Confidential Information. Nothing in this
Section 5 is intended to limit any remedy of Adicet under the California Uniform Trade Secrets Act (California Civil Code Section 3426), or otherwise available under law. 

5.5    Third Party Information. Contractor shall not disclose to Adicet, or bring onto Adicet’s
premises or induce Adicet to use any confidential or proprietary information, technology or intellectual property that belongs to anyone other than Adicet or Contractor or otherwise take any action that may result in any Work Product being
considered owned, in whole or in part, by any other third party. 

  
 3 

 5.6    Privacy. Contractor acknowledges that Adicet may access
all information and materials generated, received or maintained by or for Contractor on the premises or equipment of Adicet (including, without limitation, computer systems and electronic or voice mail systems), and Contractor hereby waives any
privacy rights Contractor may have with respect to such information and materials. During the term of this Agreement and thereafter, Contractor shall adhere to any policies, guidelines or the like adopted by Adicet from time to time regarding
treatment of personal information. Further, Contractor understands that there are laws in the United States and other countries that protect personal information, and agrees to comply with all applicable laws regarding the use and disclosure of any
personal information. 
 6.    Waiver of Rights and Constructive Trust. Contractor hereby waives any and all
rights Contractor may have or hereafter acquire in or to the Work Product, the Confidential Information or the Adicet Property, or any other work product derived directly or indirectly therefrom. Without limiting the generality of any other
provision of this Agreement, Contractor shall not copy, disclose, publish or otherwise disseminate (including without limitation in the form of any book, movie, television show, video, article, interview, blog, tweet, website posting or other public
disclosure or use of any type whatsoever) the Work Product, the Confidential Information or the Adicet Property, or any other work product derived directly or indirectly therefrom. Any and all proceeds (in cash, in kind or otherwise) directly or
indirectly resulting from any violation of this Agreement shall be held in constructive trust for the sole and exclusive benefit of Adicet, and Contractor immediately shall pay or deliver to Adicet any and all of such proceeds. 

7.    Independent Contractor Relationship. Contractor’s relationship with Adicet is that of an independent
contractor, and nothing in this Agreement is intended to, or shall be construed to, create a partnership, agency, joint venture, employment or similar relationship. Neither Contractor nor, if Contractor is an entity, any employee of Contractor
(which for purposes of this Section 7 shall be included in the term “Contractor”) shall be entitled to any benefits accorded to Adicet’s employees, including workers’ compensation, disability insurance, retirement
plans, or vacation or sick pay. Contractor’s exclusion from benefit programs maintained by Adicet is a material component of the terms of compensation negotiated by the parties, and is not premised on Contractor’s status as a non-employee with respect to Adicet. To the extent that Contractor may become eligible for any benefit programs maintained by Adicet (regardless of the timing of or reason for eligibility), Contractor hereby waives
Contractor’s right to participate in the programs. Contractor’s waiver is not conditioned on any representation or assumption concerning Contractor’s status under the common law test. Consistent with Contractor’s independent
contractor status, Contractor shall not apply for any government-sponsored benefits that are intended to apply to employees, including, without limitation, unemployment benefits. Contractor is not authorized to make any representation, contract or
commitment on behalf of Adicet unless specifically requested or authorized in writing to do so by Adicet. Contractor is solely responsible for, and shall file, on a timely basis, all tax returns and payments required to be filed with, or made to,
any federal, state or local tax authority with respect to the performance of services and receipt of fees under this Agreement, and shall provide Adicet with proof of payment on demand. Contractor is solely responsible for, and must maintain
adequate records of, expenses incurred in the course of performing services under this Agreement. No part of Contractor’s compensation shall be subject to withholding by Adicet for the payment of any social security, federal, state or any other
employee payroll taxes. Contractor shall be responsible for providing, at Contractor’s expense and in Contractor’s name, disability, workers’ compensation, or other insurance as well as licenses and permits usual or necessary for
performing the Services. 

  
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 8.    Term and Termination. 

8.1    Term. This Agreement is effective as of the Effective Date set forth above and shall terminate on the one
(1) year anniversary of the Closing, unless terminated earlier as set forth below. 
 8.2    Termination.
Either party may terminate this Agreement at any time, without cause, on ten (10) days’ prior express written notice of termination. Either party may terminate this Agreement immediately upon any material breach by the other party
by express written notice of such termination. 
 8.3    Merger Termination. Each party acknowledges and agrees
that this Agreement shall terminate in its entirety and be of no further force and effect if the Merger Agreement (as defined in the Transition Agreement) is: (1) not entered into prior to June 30, 2020 or (ii) entered into and
subsequently terminated prior to the Closing occurring. 
 8.4    Effect of Expiration or Termination. Upon
expiration or termination of this Agreement, Adicet shall pay Contractor for services performed under this Agreement as set forth in Section 2 and Exhibit A. The provisions of Sections 4, 5, 6, 7, 8.4, 10, 11 and
12 shall survive any termination or expiration of this Agreement. 
 9.    Other Services; No Conflict of
Interest. Contractor may represent, perform services for, or be employed by such additional persons or companies as Contractor sees fit, except to the extent that doing so causes Contractor to breach Contractor’s obligations under this
Agreement. During the term of this Agreement, Contractor shall not accept work, enter into a contract or accept an obligation inconsistent or incompatible with Contractor’s obligations, or the Services to be rendered to Adicet, under this
Agreement. Contractor represents and warrants that Contractor does not presently perform consulting or other services for, or engage in an employment relationship with, companies whose business or proposed business in any way involve products or
services which would be competitive with Adicet’s products or services, or those products or services proposed or in development by Adicet during the term of the Agreement. If, however, Contractor decides to do so, Contractor agrees that,
(a) Contractor shall continue to abide by the terms of this Agreement, and (b) in advance of accepting such work, Contractor will promptly notify Adicet in writing, specifying the organization with which Contractor proposes to consult,
provide services, or become employed by to allow Adicet to determine if such work would conflict with the terms of this Agreement, the interests of Adicet or further services which Adicet might request of Contractor hereunder and (c) Adicet
shall have the right to immediately terminate this Agreement by written notice to Contractor. 

10.    Contractor’s Representations and Warranties; Indemnification. 

10.1    Contractor represents and warrants to Adicet that (a) Contractor has the qualifications and ability to perform
the Services in accordance with the terms of this Agreement, without the advice, control or supervision of Adicet, (b) Contractor shall be solely responsible for the professional performance of the Services and shall receive no assistance,
direction or control from Adicet, (c) Contractor has good title to any Work Product and the right to assign Work Product to Adicet free of any proprietary rights of any other party or any other encumbrance whatsoever, (d) neither the Work
Product nor any element thereof will infringe or misappropriate any intellectual property or proprietary right of any person or entity, whether contractual, statutory or common law, (e) Contractor has never been debarred by the United States
Food and Drug Administration, or other applicable governing health authority (or authorities), under any existing or prior law or regulation and (f) (i) Contractor has all necessary power and capacity (if Contractor is an individual) or
authority (if Contractor is an entity) to enter into and perform this Agreement, (ii) this Agreement constitutes Contractor’s valid and binding obligation, enforceable in accordance with its terms, (iii) the execution and performance
of this Agreement by Contractor do not (1) violate any 

  
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provision of law applicable to Contractor, (2) conflict with or result in a default under any duty, document, agreement or instrument to which Contractor is a party or is otherwise subject
to or (3) except for notices, approvals and consents that have been made or obtained, require that Contractor obtain any consent or approval of, or give notice to, any person. Contractor further represents and warrants that, following the
Closing, Contractor will be engaged in an independently established trade, occupation, or business; maintains and operate or be employed by a business that is separate and independent from Adicet’s business; will hold himself or herself out to
the public as independently competent and available to provide applicable services similar to the Services; may obtain and/or expect to obtain clients or customers other than Adicet for whom Contractor performs services or is employed; and will
perform work for Adicet that Contractor understands is outside the usual course of Adicet’s business. 

10.2    Contractor shall and does hereby indemnify, defend, and hold harmless Adicet, and Adicet’s officers,
directors, equityholders, employees, agents, affiliates, subsidiaries, representatives, successors and assigns, from and against any and all claims, demands, losses, costs, expenses, obligations, liabilities, damages, settlements, judgments,
recoveries, and deficiencies, including, without limitation, interest, penalties, and reasonable attorney fees and costs, that Adicet may incur or suffer to the extent resulting from or relating to any breach or failure of Contractor to perform any
of its representations, warranties, and covenants in this Agreement or any actual or alleged breach by Contractor of any contract with or duty to any third party. 

11.    Non-Solicitation. Contractor acknowledges that, because of
Contractor’s responsibilities at Adicet, Contractor will help to develop, and will be exposed to, Adicet’s business strategies, information on customers and clients, and other valuable Confidential Information and trade secrets, and that
use or disclosure of such Confidential Information and trade secrets in breach of this Agreement would be extremely difficult to detect or prove. Contractor also acknowledges that Adicet’s relationships with its employees, customers, clients,
vendors, and other persons are valuable business assets. Therefore, Contractor agrees that Contractor shall not, during Contractor’s engagement with Adicet pursuant to this Agreement, or for a period of one year following termination of
Contractor’s engagement with Adicet for any reason, directly or indirectly solicit, induce, recruit, or encourage any officer, director, employee, independent contractor or consultant of Adicet who was employed by or affiliated with Adicet at
the time of the termination of Contractor’s engagement with Adicet to leave Adicet or terminate his or her employment or relationship with Adicet. 

12.    Miscellaneous. 

12.1    Successors and Assigns. Contractor may not subcontract or otherwise assign, transfer or delegate
Contractor’s rights or obligations under this Agreement without Adicet’s prior written consent. Subject to the foregoing, this Agreement shall be binding upon and shall inure to the benefit of the parties and their respective heirs, legal
representatives, successors, and permitted assigns, and shall not benefit any person or entity other than those enumerated above. Adicet may fully assign and transfer this Agreement in whole or part. 

12.2    Counterparts; Signatures. This Agreement may be executed and delivered by in two or more counterparts, each
of which shall be deemed an original, but all of which together shall constitute one and the same instrument. Any signature page delivered by facsimile or e-mail transmission of images in Adobe PDF or similar
format shall be binding to the same extent as an original signature page, with regard to any agreement subject to the terms hereof or any amendment thereto. 

12.3    Injunctive Relief. Contractor’s obligations under this Agreement are of a unique character that gives
them particular value; Contractor’s breach of any of such obligations shall result in irreparable and continuing damage to Adicet for which money damages are insufficient, and Adicet shall, 

  
 6 

 
in addition to any other remedies that may be available at law, in equity or otherwise, be entitled to injunctive relief and/or a decree for specific performance without the necessity of posting
a bond. Contractor waives any claim or defense that there is an adequate remedy at law for such breach or threatened breach. 

12.4    Attorneys’ Fees. If any legal action (including, without limitation, an action for arbitration or
injunctive relief) is brought relating to this Agreement or the breach or alleged breach hereof, the prevailing party in any final judgment or arbitration award in any such action shall be entitled to receive from the other party the reasonable
attorneys’ fees (and all related costs and expenses), and all other costs and expenses paid or incurred by such prevailing party in connection with such action or proceeding and in connection with enforcing any judgment or order with respect to
such matter. 
 12.5    Governing Law; Forum. This Agreement shall be governed by, interpreted and construed in
accordance with the laws of the State of California, without regard to the conflicts of law principles thereof. The parties hereby irrevocably and unconditionally (a) submit to the jurisdiction of the federal and state courts located within the
geographical boundaries of the United States District Court for the Northern District of California for the purpose of any suit, action or other proceeding arising out of or based upon this Agreement, (b) agree not to commence any suit, action
or other proceeding arising out of or based upon this Agreement except in the federal and state courts located within the geographical boundaries of the United States District Court for the Northern District of California, and (c) hereby 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 it is not subject personally to the jurisdiction of the above-named courts, that its 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 this Agreement or the subject matter hereof may not be enforced in or by such
court. 
 12.6    Notices. All notices, requests, waivers and other communications made pursuant to this
Agreement shall be in writing and shall be conclusively deemed to have been duly given (a) when hand delivered to the other party; (b) when sent by electronic mail to the address set forth on the signature pages hereto if sent between 8:00
am and 5:00 pm recipient’s local time on a business day, or on the next business day if sent by electronic mail other than between 8:00 am and 5:00 pm recipient’s local time; (c) three business days after deposit in the U.S. mail with
first class or certified mail receipt requested postage prepaid and addressed to the other party at the address set forth on the signature pages hereto; or (d) the next business day after deposit with a national overnight delivery service,
postage prepaid, addressed to the parties as set forth on the signature pages hereto with next business day delivery guaranteed, provided that the sending party receives a confirmation of delivery from the delivery service provider. A party may
change or supplement the addresses given above, or designate additional addresses, for purposes of this Section 11.7 by giving the other party written notice of the new address in the manner set forth above. 

12.7    Further Assurances. Adicet and Contractor shall from time to time and at all times hereafter make, do,
execute, or cause or procure to be made, done and executed such further acts, deeds, conveyances, consents and assurances without further consideration, which may reasonably be required to effect the transactions contemplated by this Agreement. 

12.8    Enforceability; Severability. The parties hereto agree that each provision of this Agreement shall be
interpreted in such a manner as to be effective and valid under applicable law. If one or more provisions of this Agreement are held to be unenforceable under applicable law, (a) such provision shall be ineffective only to the extent of such
prohibition or invalidity, without invalidating the remainder of such provision or the remaining provisions of this Agreement, and (b) the balance of the Agreement shall be interpreted as if such provision were so modified and shall be
enforceable in accordance with its terms. 

  
 7 

 12.9    Amendments; Waivers. This Agreement shall not be varied,
altered, modified, changed or in any way amended except by an instrument in writing executed by Contractor and a duly authorized representative of Adicet. No waiver by a party of a breach of or obligation under this Agreement shall constitute a
waiver of any other or subsequent breach or obligation. 
 12.10    18 U.S.C. § 1833(b)
Notice. Contractor understands that 18 U.S.C. § 1833(b) states as follows: 
 An individual shall not be held criminally or civilly
liable under any Federal or State trade secret law for the disclosure of a trade secret that-(A) is made-(i) in confidence to a Federal, State, or local government official, either directly or indirectly, or to an attorney; and (ii) solely for
the purpose of reporting or investigating a suspected violation of law; or (B) is made in a complaint or other document filed in a lawsuit or other proceeding, if such filing is made under seal. 

Accordingly, notwithstanding anything to the contrary in this Agreement, Contractor understands that Contractor has the right to disclose in confidence trade
secrets to Federal, State, and local government officials, or to an attorney, for the sole purpose of reporting or investigating a suspected violation of law. Contractor understands that Contractor also has the right to disclose trade secrets in a
document filed in a lawsuit or other proceeding, but only if the filing is made under seal and protected from public disclosure. Contractor understands and acknowledges that nothing in this Agreement is intended to conflict with 18 U.S.C. §
1833(b) or create liability for disclosures of trade secrets that are expressly allowed by 18 U.S.C. § 1833(b). 

12.11    Acknowledgement; Interpretation. The parties acknowledge that: (a) they have each had the opportunity
to consult with independent counsel of their own choice concerning this Agreement and have done so to the extent they deem necessary, and (b) they each have read and understand the Agreement, are fully aware of its legal effect, and have
entered into it voluntarily and freely based on their own judgment and not on any promises or representations other than those contained in the Agreement. This Agreement shall be construed as a whole, according to its fair meaning, and not in favor
of or against any party. By way of example and not in limitation, this Agreement shall not be construed in favor of the party receiving a benefit nor against the party responsible for any particular language in this Agreement. Captions are used for
reference purposes only and should be ignored in the interpretation of this Agreement. 
 12.12    Entire
Agreement. This Agreement, together with the Transition Agreement, constitute the entire agreement between the parties relating to this subject matter and supersede all prior or contemporaneous representations, warranties or agreements
concerning such subject matter, written or oral; provided, however, that, notwithstanding the foregoing, this Agreement shall in no way supersede or effect the enforceability of that certain Employee Proprietary Information and Inventions Assignment
Agreement, dated as of May 6, 2019, by and between Adicet and Contractor, which shall continue in full force and effect. 

[Remainder of Page Left Intentionally Blank] 

  
 8 

 IN WITNESS WHEREOF, the parties have executed this Agreement as of the Effective Date. 

 

			
	ADICET BIO, INC.
		
	By:	 	 /s/ Donald Santel

	Name:	 	Donald Santel
	Title:	 	Executive Chairman
	
	Address for Notices:
	
	200 Constitution Drive
	Menlo Park, CA 94025
	
	ANIL SINGHAL
		
	By:	 	 /s/ Anil Singhal

	Name:	 	Anil Singhal
	
	Address for Notices:

  
 SIGNATURE
PAGE TO INDEPENDENT CONTRACTOR SERVICES AGREEMENT 

 EXHIBIT A 

SERVICES AND COMPENSATION 
 Description
of Services. 
 Contractor will serve as a senior advisor to Adicet and provide strategic advice and such other services, all as related to Adicet
business, as requested by Adicet from time to time. 
 Contractor agrees to be available and to devote as requested up to 40 hours per month to performing
Contractor’s obligations to Adicet pursuant to this Agreement (or such greater amount as mutually agreed to from time to time by Contractor and Adicet). Without Contractor’s consent, Contractor has no duty or obligation to ever work more
than 40 hours in any given month. 
 Adicet shall not supervise Contractor in the
day-to-day performance of the Services. All of the services to be performed by Contractor, including but not limited to the Services, will be as agreed between
Contractor and the Board or the Board’s designee. Contractor will be required to report to the Board or the Board’s designee concerning the Services performed under this Agreement. The nature and frequency of these reports will be in the
discretion of the Board or the Board’s designee. 
 Contractor shall be free to choose the location at which Contractor provides the Services;
provided, however, that Contractor shall be available to provide the Services at Adicet’s San Francisco Bay Area offices at least one day a week if requested by the Board or the Board’s designee upon reasonable advance notice. 

Compensation and Payment Terms. 
 Adicet shall pay
Contractor $12,500.00 per month during the term of this Agreement commencing on the Start Date, pro-rated for any partial month of service hereunder. Such amounts shall be paid within thirty (30) days of
the end of each month during the term of this Agreement. Any additional hours beyond 40 hours in any given month shall be compensated at the rate of $312.50 per hour, pro-rated for any partial hour of service
hereunder. 
 Contractor shall not be authorized to incur on behalf of Adicet any expenses and will be responsible for all expenses incurred while
performing the Services unless otherwise agreed to in advance by the Board or the Board’s designee in writing (“Approved Expenses”). Adicet shall reimburse Approved Expenses no later than thirty (30) days after
Adicet’s receipt of Contractor’s invoice, provided that reimbursement for Approved Expenses may be delayed until such time as Contractor has furnished reasonable documentation for Approved Expenses as Adicet may reasonably request.
Contractor shall submit to Adicet all statements for Approved Expenses incurred on a monthly basis in a form prescribed by Adicet. 

  
 A-1

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