Document:

EX-10.12

 Exhibit 10.12 

EMPLOYMENT AGREEMENT 

This Employment Agreement (“Agreement”) is made between iTeos Therapeutics, Inc. (the “Company”), and Matthew Gall (the
“Executive”) and is effective as of the closing of the Company’s first underwritten public offering of its equity securities pursuant to an effective registration statement under the Securities Act of 1933, as amended (the
“Effective Date”). Except with respect to the Restrictive Covenants Agreement and the Equity Documents (each as defined below), this Agreement supersedes in all respects all prior agreements between the Executive and the Company regarding
the subject matter herein, including without limitation (i) the Employment Agreement between the Executive and the Company dated May 15, 2020 (the “Prior Agreement”), and (ii) any offer letter, employment agreement or
severance agreement. 
 WHEREAS, the Company desires to continue to employ the Executive and the Executive desires to continue to be
employed by the Company on the new terms and conditions contained herein. 
 NOW, THEREFORE, in consideration of the mutual covenants
and agreements herein contained and other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the parties agree as follows: 

1. Employment. 
 (a)
Term. The Company shall employ the Executive and the Executive shall be employed by the Company pursuant to this Agreement commencing as of the Effective Date and continuing until such employment is terminated in accordance with the
provisions hereof (the “Term”). The Executive’s employment with the Company will continue to be “at will,” meaning that the Executive’s employment may be terminated by the Company or the Executive at any time and for
any reason subject to the terms of this Agreement. 
 (b) Position and Duties. The Executive shall serve as the Chief Financial
Officer of the Company and shall have such powers and duties as may from time to time be prescribed by the Chief Executive Officer (the “CEO”) or other duly authorized executive. The Executive shall devote the Executive’s full working
time and efforts to the business and affairs of the Company. Notwithstanding the foregoing, the Executive may serve on other boards of directors, with the approval of the Board of Directors of the Company (the “Board”), or engage in
religious, charitable or other community activities as long as such services and activities do not interfere with the Executive’s performance of the Executive’s duties to the Company 

2. Compensation and Related Matters. 

(a) Base Salary. The Executive’s initial base salary shall be paid at the rate of $400,000 per year. The Executive’s
base salary shall be subject to periodic review by the Board or the Compensation Committee of the Board (the “Compensation Committee”). The base salary in effect at any given time is referred to herein as “Base Salary.”
The Base Salary shall be payable in a manner that is consistent with the Company’s usual payroll practices for executive officers. 

 (b) Incentive Compensation. The Executive shall be eligible to receive cash incentive
compensation as determined by the Board or the Compensation Committee from time to time. The Executive’s initial target annual incentive compensation shall be 40 percent of the Executive’s Base Salary. The target annual
incentive compensation in effect at any given time is referred to herein as “Target Bonus.” The actual amount of the Executive’s annual incentive compensation, if any, shall be determined in the sole discretion of the Board or the
Compensation Committee, subject to the terms of any applicable incentive compensation plan that may be in effect from time to time. To earn incentive compensation, the Executive must be employed by the Company on the day such incentive compensation
is paid. 
 (c) Expenses. The Executive shall be entitled to receive prompt reimbursement for all reasonable expenses incurred by the
Executive during the Term in performing services hereunder, in accordance with the policies and procedures then in effect and established by the Company for its executive officers. 

(d) Other Benefits. The Executive shall be eligible to participate in or receive benefits under the Company’s employee benefit
plans in effect from time to time, subject to the terms of such plans. 
 (e) Paid Time Off. The Executive shall be entitled to take
paid time off in accordance with the Company’s applicable paid time off policy for executives, as may be in effect from time to time. 

(f) Equity. The equity awards held by the Executive shall continue to be governed by the terms and conditions of the Company’s
applicable equity incentive plan(s) and the applicable award agreement(s) governing the terms of such equity awards held by the Executive (collectively, the “Equity Documents”); provided, however, and notwithstanding anything to the
contrary in the Equity Documents, Section 6(a)(ii) of this Agreement shall apply in the event of a termination by the Company without Cause or by the Executive for Good Reason in either event within the Change in Control Period (as such terms
are defined below). 
 3. Termination. The Executive’s employment hereunder may be terminated without any breach of this
Agreement under the following circumstances: 
 (a) Death. The Executive’s employment hereunder shall terminate upon death. 

(b) Disability. The Company may terminate the Executive’s employment if the Executive is disabled and unable to perform or expected
to be unable to perform the essential functions of the Executive’s then existing position or positions under this Agreement with or without reasonable accommodation for a period of 180 days (which need not be consecutive) in any 12-month period. If any question shall arise as to whether during any period the Executive is disabled so as to be unable to perform the essential functions of the Executive’s then existing position or
positions with or without reasonable accommodation, the Executive may, and at the request of the Company shall, submit to the Company a certification in reasonable detail by a physician selected by the Company to whom the Executive or the
Executive’s guardian has no reasonable objection as to whether the Executive is so disabled or how long such disability is 

  
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expected to continue, and such certification shall for the purposes of this Agreement be conclusive of the issue. The Executive shall cooperate with any reasonable request of the physician in
connection with such certification. If such question shall arise and the Executive shall fail to submit such certification, the Company’s determination of such issue shall be binding on the Executive. Nothing in this Section 3(b) shall be
construed to waive the Executive’s rights, if any, under existing law including, without limitation, the Family and Medical Leave Act of 1993, 29 U.S.C. §2601 et seq. and the Americans with Disabilities Act, 42 U.S.C. §12101
et seq. 
 (c) Termination by Company for Cause. The Company may terminate the Executive’s employment hereunder for Cause.
For purposes of this Agreement, “Cause” shall mean any of the following: 
 (i) conduct by the Executive constituting a
material act of misconduct in connection with the performance of the Executive’s duties, including, without limitation, (A) willful failure or refusal to perform material responsibilities that have been requested by the CEO;
(B) dishonesty to the CEO with respect to any material matter; or (C) misappropriation of funds or property of the Company or any of its subsidiaries or affiliates other than the occasional, customary and de minimis use of Company
property for personal purposes; 
 (ii) the commission by the Executive of acts satisfying the elements of (A) any felony or (B) a
misdemeanor involving moral turpitude, deceit, dishonesty or fraud; 
 (iii) any misconduct by the Executive, regardless of whether or not
in the course of the Executive’s employment, that would reasonably be expected to result in material injury or reputational harm to the Company or any of its subsidiaries or affiliates if the Executive were to continue to be employed in the
same position; 
 (iv) continued non-performance by the Executive of the Executive’s duties
hereunder (other than by reason of the Executive’s physical or mental illness, incapacity or disability) which has continued for more than 30 days following written notice of such non-performance from the
CEO; 
 (v) a breach by the Executive of any of the provisions contained in Section 8 of this Agreement or the Restrictive Covenants
Agreement (as defined below); 
 (vi) a material violation by the Executive of any of the Company’s written employment policies; or

 (vii) the Executive’s failure to cooperate with a bona fide internal investigation or an investigation by regulatory or law
enforcement authorities, after being instructed by the Company to cooperate, or the willful destruction or failure to preserve documents or other materials known to be relevant to such investigation or the inducement of others to fail to cooperate
or to produce documents or other materials in connection with such investigation. 

  
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 (d) Termination by the Company without Cause. The Company may terminate the
Executive’s employment hereunder at any time without Cause. Any termination by the Company of the Executive’s employment under this Agreement which does not constitute a termination for Cause under Section 3(c) and does not result
from the death or disability of the Executive under Section 3(a) or (b) shall be deemed a termination without Cause. 
 (e)
Termination by the Executive. The Executive may terminate employment hereunder at any time for any reason, including but not limited to, Good Reason. For purposes of this Agreement, “Good Reason” shall mean that the Executive
has completed all steps of the Good Reason Process (hereinafter defined) following the occurrence of any of the following events without the Executive’s consent (each, a “Good Reason Condition”): 

(i) a material diminution in the Executive’s responsibilities, authority or duties; 

(ii) a material diminution in the Executive’s Base Salary except for across-the-board salary reductions based on the Company’s financial performance similarly affecting all or substantially all senior management employees of the Company; 

(iii) a material change in the geographic location at which the Executive provides services to the Company, such that there is
an increase of at least thirty (30) miles of driving distance to such location from the Executive’s principal residence as of such change; or 

(iv) a material breach of this Agreement by the Company. 

The “Good Reason Process” consists of the following steps: 

(i) the Executive reasonably determines in good faith that a Good Reason Condition has occurred; 

(ii) the Executive notifies the Company in writing of the first occurrence of the Good Reason Condition within 60 days of the
first occurrence of such condition; 
 (iii) the Executive cooperates in good faith with the Company’s efforts, for a
period of not less than 30 days following such notice (the “Cure Period”), to remedy the Good Reason Condition; 

(iv) notwithstanding such efforts, the Good Reason Condition continues to exist; and 

(v) the Executive terminates employment within 60 days after the end of the Cure Period. 

If the Company cures the Good Reason Condition during the Cure Period, Good Reason shall be deemed not to have occurred. 

  
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 If the Executive’s employment with the Company is terminated for any reason, the Company shall pay or
provide to the Executive (or to the Executive’s authorized representative or estate) (i) any Base Salary earned through the Date of Termination; (ii) unpaid expense reimbursements (subject to, and in accordance with,
Section 2(c) of this Agreement); and (iii) any vested benefits the Executive may have under any employee benefit plan of the Company through the Date of Termination, which vested benefits shall be paid and/or provided in accordance with
the terms of such employee benefit plans (collectively, the “Accrued Obligations”). 
 4. Notice and Date of Termination.

 (a) Notice of Termination. Except for termination as specified in Section 3(a), any termination of the Executive’s
employment by the Company or any such termination by the Executive shall be communicated by written Notice of Termination to the other party hereto. For purposes of this Agreement, a “Notice of Termination” shall mean a notice which shall
indicate the specific termination provision in this Agreement relied upon. 
 (b) Date of Termination. “Date of Termination”
shall mean: (i) if the Executive’s employment is terminated by death, the date of death; (ii) if the Executive’s employment is terminated on account of disability under Section 3(b) or by the Company for Cause under
Section 3(c), the date on which Notice of Termination is given; (iii) if the Executive’s employment is terminated by the Company without Cause under Section 3(d), the date on which a Notice of Termination is given or the date
otherwise specified by the Company in the Notice of Termination; (iv) if the Executive’s employment is terminated by the Executive under Section 3(e) other than for Good Reason, 14 days after the date on which a Notice of Termination
is given, and (v) if the Executive’s employment is terminated by the Executive under Section 3(e) for Good Reason, the date on which a Notice of Termination is given after the end of the Cure Period. Notwithstanding the foregoing, in
the event that the Executive gives a Notice of Termination to the Company, the Company may unilaterally accelerate the Date of Termination and such acceleration shall not result in a termination by the Company for purposes of this Agreement. 

5. Severance Pay and Benefits Upon Termination by the Company without Cause or by the Executive for Good Reason Outside the Change in
Control Period. If the Executive’s employment is terminated by the Company without Cause as provided in Section 3(d), or the Executive terminates employment for Good Reason as provided in Section 3(e), each outside of the Change
in Control Period (as defined below), then, in addition to the Accrued Obligations, and subject to (i) the Executive signing a separation agreement and release in a form and manner satisfactory to the Company, which shall include,
without limitation, a general release of claims against the Company and all related persons and entities, a reaffirmation of all of the Executive’s Continuing Obligations (as defined below), and, in the Company’s sole discretion, a one-year post-employment noncompetition agreement, and shall provide that if the Executive breaches any of the Continuing Obligations, all payments of the Severance Amount shall immediately cease (the
“Separation Agreement and Release”), and (ii) the Separation Agreement and Release becoming irrevocable, all within 60 days after the Date of Termination (or such shorter period as set forth in the Separation Agreement and Release),
which shall include a seven (7) business day revocation period, the Company shall pay the Executive an amount equal to twelve (12) months of the Executive’s Base Salary (the “Severance Amount”); provided in the
event the Executive is entitled to any payments pursuant to the Restrictive Covenants Agreement, the Severance Amount received in any calendar year will be reduced by the amount the Executive is paid in the same such calendar year pursuant to the
Restrictive Covenants Agreement (the “Restrictive Covenants Agreement Setoff”). 

  
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 The amounts payable under Section 5, to the extent taxable, shall be paid out in substantially equal
installments in accordance with the Company’s payroll practice over twelve (12) months commencing within 60 days after the Date of Termination; provided, however, that if the
60-day period begins in one calendar year and ends in a second calendar year, the Severance Amount, to the extent it qualifies as “non-qualified deferred
compensation” within the meaning of Section 409A of the Internal Revenue Code of 1986, as amended (the “Code”), shall begin to be paid in the second calendar year by the last day of such
60-day period; provided, further, that the initial payment shall include a catch-up payment to cover amounts retroactive to the day immediately following the Date of
Termination. Each payment pursuant to this Agreement is intended to constitute a separate payment for purposes of Treasury Regulation Section 1.409A-2(b)(2). 

6. Severance Pay and Benefits Upon Termination by the Company without Cause or by the Executive for Good Reason within the Change in Control
Period. The provisions of this Section 6 shall apply in lieu of, and expressly supersede, the provisions of Section 5 if (i) the Executive’s employment is terminated either (a) by the Company without Cause as provided in
Section 3(d), or (b) by the Executive for Good Reason as provided in Section 3(e), and (ii) the Date of Termination is within 12 months after the occurrence of the first event constituting a Change in Control (such period, the
“Change in Control Period”). These provisions shall terminate and be of no further force or effect after a Change in Control Period. 

(a) If the Executive’s employment is terminated by the Company without Cause as provided in Section 3(d) or the Executive terminates
employment for Good Reason as provided in Section 3(e) and in each case the Date of Termination occurs during the Change in Control Period, then, in addition to the Accrued Obligations, and subject to the signing of the Separation Agreement and
Release by the Executive and the Separation Agreement and Release becoming fully effective, all within the time frame set forth in the Separation Agreement and Release but in no event more than 60 days after the Date of Termination: 

(i) the Company shall pay the Executive a lump sum in cash in an amount equal to the Executive’s then current Base Salary
(or the Executive’s Base Salary in effect immediately prior to the Change in Control, if higher) (the “Change in Control Payment”); provided the Change in Control Payment shall be reduced by the amount of the Restrictive Covenants
Agreement Setoff, if applicable; and 
 (ii) notwithstanding anything to the contrary in any applicable option agreement or
other stock-based award agreement, all time-based stock options and other stock-based awards subject to time-based vesting held by the Executive (the “Time-Based Equity Awards”) shall immediately accelerate and become fully exercisable or
nonforfeitable as of the later of (i) the Date of Termination or (ii) the effective date of the Separation Agreement and Release (the “Accelerated Vesting Date”); provided that any termination or forfeiture of the unvested
portion of such Time-Based Equity Awards that would otherwise occur on the Date of Termination in the absence of this Agreement will be delayed until the effective date of the Separation Agreement and Release and will only occur if the vesting
pursuant to this subsection does not occur due to the absence of the Separation Agreement and Release becoming fully effective within the time period set forth therein. Notwithstanding the foregoing, no additional vesting of the Time-Based Equity
Awards shall occur during the period between the Executive’s Date of Termination and the Accelerated Vesting Date. 

  
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 The amounts payable under this Section 6(a), to the extent taxable, shall be paid or commence to be
paid within 60 days after the Date of Termination; provided, however, that if the 60-day period begins in one calendar year and ends in a second calendar year, such payments to the extent they qualify as “non-qualified deferred compensation” within the meaning of Section 409A of the Code, shall be paid or commence to be paid in the second calendar year by the last day of such 60-day period. 
 (b) Additional Limitation. 

(i) Anything in this Agreement to the contrary notwithstanding, in the event that the amount of any compensation, payment or
distribution by the Company to or for the benefit of the Executive, whether paid or payable or distributed or distributable pursuant to the terms of this Agreement or otherwise, calculated in a manner consistent with Section 280G of the Code,
and the applicable regulations thereunder (the “Aggregate Payments”), would be subject to the excise tax imposed by Section 4999 of the Code, then the Aggregate Payments shall be reduced (but not below zero) so that the sum of all of
the Aggregate Payments shall be $1.00 less than the amount at which the Executive becomes subject to the excise tax imposed by Section 4999 of the Code; provided that such reduction shall only occur if it would result in the Executive receiving
a higher After Tax Amount (as defined below) than the Executive would receive if the Aggregate Payments were not subject to such reduction. In such event, the Aggregate Payments shall be reduced in the following order, in each case, in reverse
chronological order beginning with the Aggregate Payments that are to be paid the furthest in time from consummation of the transaction that is subject to Section 280G of the Code: (1) cash payments not subject to Section 409A of the
Code; (2) cash payments subject to Section 409A of the Code; (3) equity-based payments and acceleration; and (4) non-cash forms of benefits; provided that in the case of all the foregoing
Aggregate Payments all amounts or payments that are not subject to calculation under Treas. Reg. §1.280G-1, Q&A-24(b) or (c) shall be reduced before any
amounts that are subject to calculation under Treas. Reg. §1.280G-1, Q&A-24(b) or (c). 

(ii) For purposes of this Section 6(b), the “After Tax Amount” means the amount of the Aggregate Payments less
all federal, state, and local income, excise and employment taxes imposed on the Executive as a result of the Executive’s receipt of the Aggregate Payments. For purposes of determining the After Tax Amount, the Executive shall be deemed to pay
federal income taxes at the highest marginal rate of federal income taxation applicable to individuals for the calendar year in which the determination is to be made, and state and local income taxes at the highest marginal rates of individual
taxation in each applicable state and locality, net of the maximum reduction in federal income taxes which could be obtained from deduction of such state and local taxes. 

  
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 (iii) The determination as to whether a reduction in the Aggregate Payments
shall be made pursuant to Section 6(b)(i) shall be made by a nationally recognized accounting firm selected by the Company (the “Accounting Firm”), which shall provide detailed supporting calculations both to the Company and the
Executive within 15 business days of the Date of Termination, if applicable, or at such earlier time as is reasonably requested by the Company or the Executive. Any determination by the Accounting Firm shall be binding upon the Company and the
Executive. 
 (c) Definitions. For purposes of this Section 6, the following terms shall have the following meanings: 

“Change in Control” shall mean any of the following: 

(i) any “person,” as such term is used in Sections 13(d) and 14(d) of the Securities Exchange Act of 1934, as amended
(the “Act”) (other than the Company, any of its subsidiaries, or any trustee, fiduciary or other person or entity holding securities under any employee benefit plan or trust of the Company or any of its subsidiaries), together with all
“affiliates” and “associates” (as such terms are defined in Rule 12b-2 under the Act) of such person, shall become the “beneficial owner” (as such term is defined in Rule 13d-3 under the Act), directly or indirectly, of securities of the Company representing 50 percent or more of the combined voting power of the Company’s then outstanding securities having the right to vote
in an election of the Board (“Voting Securities”) (in such case other than as a result of an acquisition of securities directly from the Company); or 

(ii) the date a majority of the members of the Board is replaced during any 12-month
period by directors whose appointment or election is not endorsed by a majority of the members of the Board before the date of the appointment or election; or 

(iii) the consummation of (A) any consolidation or merger of the Company where the stockholders of the Company,
immediately prior to the consolidation or merger, would not, immediately after the consolidation or merger, beneficially own (as such term is defined in Rule 13d-3 under the Act), directly or indirectly,
shares representing in the aggregate more than 50 percent of the voting shares of the Company issuing cash or securities in the consolidation or merger (or of its ultimate parent corporation, if any), or (B) any sale or other transfer (in
one transaction or a series of transactions contemplated or arranged by any party as a single plan) of all or substantially all of the assets of the Company. 

Notwithstanding the foregoing, a “Change in Control” shall not be deemed to have occurred for purposes of the foregoing clause
(i) solely as the result of an acquisition of securities by the Company which, by reducing the number of shares of Voting Securities outstanding, increases the proportionate number of Voting Securities beneficially owned by any person to
50 percent or more of the combined voting power of all of the then outstanding Voting Securities; provided, however, that if any person referred to in this sentence shall thereafter become the beneficial owner of any additional shares of Voting
Securities (other than pursuant to a stock split, stock dividend, or similar transaction or as a result of an acquisition of securities directly from the Company) and immediately thereafter beneficially owns 50 percent or more of the combined
voting power of all of the then outstanding Voting Securities, then a “Change in Control” shall be deemed to have occurred for purposes of the foregoing clause (i). 

  
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 7. Section 409A. 

(a) Anything in this Agreement to the contrary notwithstanding, if at the time of the Executive’s separation from service within the
meaning of Section 409A of the Code, the Company determines that the Executive is a “specified employee” within the meaning of Section 409A(a)(2)(B)(i) of the Code, then to the extent any payment or benefit that the Executive
becomes entitled to under this Agreement or otherwise on account of the Executive’s separation from service would be considered deferred compensation otherwise subject to the 20 percent additional tax imposed pursuant to
Section 409A(a) of the Code as a result of the application of Section 409A(a)(2)(B)(i) of the Code, such payment shall not be payable and such benefit shall not be provided until the date that is the earlier of (A) six months and one
day after the Executive’s separation from service, or (B) the Executive’s death. If any such delayed cash payment is otherwise payable on an installment basis, the first payment shall include a
catch-up payment covering amounts that would otherwise have been paid during the six-month period but for the application of this provision, and the balance of the
installments shall be payable in accordance with their original schedule. 
 (b) All in-kind benefits
provided and expenses eligible for reimbursement under this Agreement shall be provided by the Company or incurred by the Executive during the time periods set forth in this Agreement. All reimbursements shall be paid as soon as administratively
practicable, but in no event shall any reimbursement be paid after the last day of the taxable year following the taxable year in which the expense was incurred. The amount of in-kind benefits provided or
reimbursable expenses incurred in one taxable year shall not affect the in-kind benefits to be provided or the expenses eligible for reimbursement in any other taxable year (except for any lifetime or other
aggregate limitation applicable to medical expenses). Such right to reimbursement or in-kind benefits is not subject to liquidation or exchange for another benefit. 

(c) To the extent that any payment or benefit described in this Agreement constitutes
“non-qualified deferred compensation” under Section 409A of the Code, and to the extent that such payment or benefit is payable upon the Executive’s termination of employment, then such
payments or benefits shall be payable only upon the Executive’s “separation from service.” The determination of whether and when a separation from service has occurred shall be made in accordance with the presumptions set forth in
Treasury Regulation Section 1.409A-1(h). 
 (d) The parties intend that this Agreement will be
administered in accordance with Section 409A of the Code. To the extent that any provision of this Agreement is ambiguous as to its compliance with Section 409A of the Code, the provision shall be read in such a manner so that all payments
hereunder comply with Section 409A of the Code. Each payment pursuant to this Agreement or the Restrictive Covenants Agreement is intended to constitute a separate payment for purposes of Treasury Regulation
Section 1.409A-2(b)(2). The parties agree that this Agreement may be amended, as reasonably requested by either party, and as may be necessary to fully comply with Section 409A of the Code and all
related rules and regulations in order to preserve the payments and benefits provided hereunder without additional cost to either party. 

  
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 (e) The Company makes no representation or warranty and shall have no liability to the
Executive or any other person if any provisions of this Agreement are determined to constitute deferred compensation subject to Section 409A of the Code but do not satisfy an exemption from, or the conditions of, such Section. 

8. Continuing Obligations.  

(a) Restrictive Covenants Agreement. As a condition of entering into this Agreement, Executive is required to enter into the
Employee Confidentiality, Assignment, Nonsolicitation and Noncompetition Agreement, attached hereto as Exhibit A (the “Restrictive Covenants Agreement”). For purposes of this Agreement, the obligations in this
Section 8 and those that arise in the Restrictive Covenants Agreement and any other agreement relating to confidentiality, assignment of inventions, or other restrictive covenants shall collectively be referred to as the “Continuing
Obligations.” 
 (b) Third-Party Agreements and Rights. The Executive hereby confirms that the Executive is not bound by the
terms of any agreement with any previous employer or other party which restricts in any way the Executive’s use or disclosure of information, other than confidentiality restrictions (if any), or the Executive’s engagement in any business.
The Executive represents to the Company that the Executive’s execution of this Agreement, the Executive’s employment with the Company and the performance of the Executive’s proposed duties for the Company will not violate any
obligations the Executive may have to any such previous employer or other party. In the Executive’s work for the Company, the Executive will not disclose or make use of any information in violation of any agreements with or rights of any such
previous employer or other party, and the Executive will not bring to the premises of the Company any copies or other tangible embodiments of non-public information belonging to or obtained from any such
previous employment or other party. 
 (c) Litigation and Regulatory Cooperation. During and after the Executive’s employment,
the Executive shall cooperate fully with the Company in (i) the defense or prosecution of any claims or actions now in existence or which may be brought in the future against or on behalf of the Company which relate to events or occurrences
that transpired while the Executive was employed by the Company, and (ii) the investigation, whether internal or external, of any matters about which the Company believes the Executive may have knowledge or information. The Executive’s
full cooperation in connection with such claims, actions or investigations shall include, but not be limited to, being available to meet with counsel to answer questions or to prepare for discovery or trial and to act as a witness on behalf of the
Company at mutually convenient times. During and after the Executive’s employment, the Executive also shall cooperate fully with the Company in connection with any investigation or review of any federal, state or local regulatory authority as
any such investigation or review relates to events or occurrences that transpired while the Executive was employed by the Company. The Company shall reimburse the Executive for any reasonable out-of-pocket expenses incurred in connection with the Executive’s performance of obligations pursuant to this Section 8(c). 

  
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 (d) Relief. The Executive agrees that it would be difficult to measure any damages
caused to the Company which might result from any breach by the Executive of the Continuing Obligations, and that in any event money damages would be an inadequate remedy for any such breach. Accordingly, the Executive agrees that if the
Executive breaches, or proposes to breach, any portion of the Continuing Obligations, the Company shall be entitled, in addition to all other remedies that it may have, to an injunction or other appropriate equitable relief to restrain any such
breach without showing or proving any actual damage to the Company. 
 9. Arbitration of Disputes. 

(a) Arbitration Generally. Any controversy or claim arising out of or relating to this Agreement or the breach thereof or otherwise
arising out of the Executive’s employment or the termination of that employment (including, without limitation, any claims of unlawful employment discrimination or retaliation, whether based on race, religion, national origin, sex, gender, age,
disability, sexual orientation, or any other protected class under applicable law, including without limitation Massachusetts General Laws Chapter 151B) shall, to the fullest extent permitted by law, be settled by arbitration in any forum and form
agreed upon by the parties or, in the absence of such an agreement, under the auspices of JAMS in Boston, Massachusetts in accordance with the JAMS Employment Arbitration Rules, including, but not limited to, the rules and procedures applicable to
the selection of arbitrators. The Executive understands that the Executive may only bring such claims in the Executive’s individual capacity, and not as a plaintiff or class member in any purported class proceeding or any purported
representative proceeding. The Executive further understands that, by signing this Agreement, the Company and the Executive are giving up any right they may have to a jury trial on all claims they may have against each other. Judgment upon the award
rendered by the arbitrator may be entered in any court having jurisdiction thereof. This Section 9 shall be specifically enforceable. Notwithstanding the foregoing, this Section 9 shall not preclude either party from pursuing a court
action for the sole purpose of obtaining a temporary restraining order or a preliminary injunction in circumstances in which such relief is appropriate, including without limitation relief sought under the Restrictive Covenants Agreement; provided
that any other relief shall be pursued through an arbitration proceeding pursuant to this Section 9. 
 (b) Arbitration Fees and
Costs. The Executive shall be required to pay an arbitration fee to initiate any arbitration equal to what the Executive would be charged as a first appearance fee in court. The Company shall advance the remaining fees and costs of the
arbitrator. However, to the extent permissible under the law, and following the arbitrator’s ruling on the matter, the arbitrator may rule that the arbitrator’s fees and costs be distributed in an alternative manner. Each party shall pay
its own costs and attorneys’ fees, if any. If, however, any party prevails on a statutory or contractual claim that affords the prevailing party attorneys’ fees (including pursuant to this Agreement), the arbitrator may award
attorneys’ fees to the prevailing party to the extent permitted by law. 
 10. Consent to Jurisdiction. To the extent that any
court action is permitted consistent with or to enforce Section 9 of this Agreement, the parties hereby consent to the jurisdiction of the state and federal courts of the Commonwealth of Massachusetts. Accordingly, with respect to
any such court action, the Executive (a) submits to the exclusive personal jurisdiction of such courts; (b) consents to service of process; and (c) waives any other requirement (whether imposed by statute, rule of court, or otherwise)
with respect to personal jurisdiction or service of process. 

  
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 11. Waiver of Jury Trial. Each of the Executive and the Company irrevocably and
unconditionally WAIVES ALL RIGHT TO TRIAL BY JURY IN ANY PROCEEDING (WHETHER BASED ON CONTRACT, TORT OR OTHERWISE) ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE EXECUTIVE’S EMPLOYMENT BY THE COMPANY OR ANY AFFILIATE OF THE COMPANY,
INCLUDING WITHOUT LIMITATION THE EXECUTIVE’S OR THE COMPANY’S PERFORMANCE UNDER, OR THE ENFORCEMENT OF, THIS AGREEMENT. 
 12.
Integration. This Agreement constitutes the entire agreement between the parties with respect to the subject matter hereof and supersedes all prior agreements between the parties concerning such subject matter, provided that the Restrictive
Covenants Agreement and the Equity Documents remain in full force and effect. 
 13. Withholding; Tax Effect. All payments made by the
Company to the Executive under this Agreement shall be net of any tax or other amounts required to be withheld by the Company under applicable law. Nothing in this Agreement shall be construed to require the Company to make any payments to
compensate the Executive for any adverse tax effect associated with any payments or benefits or for any deduction or withholding from any payment or benefit. 

14. Assignment. Neither the Executive nor the Company may make any assignment of this Agreement or any interest in it, by operation of
law or otherwise, without the prior written consent of the other; provided, however, that the Company may assign its rights and obligations under this Agreement (including the Restrictive Covenants Agreement) without the Executive’s consent to
any affiliate or to any person or entity with whom the Company shall hereafter effect a reorganization, consolidate with, or merge into or to whom it transfers all or substantially all of its properties or assets; provided further that if the
Executive remains employed or becomes employed by the Company, the purchaser or any of their affiliates in connection with any such transaction, then the Executive shall not be entitled to any payments, benefits or vesting pursuant to Section 5
or pursuant to Section 6 of this Agreement solely as a result of such transaction. This Agreement shall inure to the benefit of and be binding upon the Executive and the Company, and each of the Executive’s and the Company’s
respective successors, executors, administrators, heirs and permitted assigns. 
 15. Enforceability. If any portion or provision of
this Agreement (including, without limitation, any portion or provision of any section of this Agreement) shall to any extent be declared illegal or unenforceable by a court of competent jurisdiction, then the remainder of this Agreement, or the
application of such portion or provision in circumstances other than those as to which it is so declared illegal or unenforceable, shall not be affected thereby, and each portion and provision of this Agreement shall be valid and enforceable to the
fullest extent permitted by law. 

  
 12 

 16. Survival. The provisions of this Agreement shall survive the termination of this
Agreement and/or the termination of the Executive’s employment to the extent necessary to effectuate the terms contained herein. 
 17.
Waiver. No waiver of any provision hereof shall be effective unless made in writing and signed by the waiving party. The failure of any party to require the performance of any term or obligation of this Agreement, or the waiver by any party
of any breach of this Agreement, shall not prevent any subsequent enforcement of such term or obligation or be deemed a waiver of any subsequent breach. 

18. Notices. Any notices, requests, demands and other communications provided for by this Agreement shall be sufficient if in writing
and delivered in person or sent by a nationally recognized overnight courier service or by registered or certified mail, postage prepaid, return receipt requested, to the Executive at the last address the Executive has filed in writing with the
Company or, in the case of the Company, at its main offices, attention of the Board. 
 19. Amendment. This Agreement may be amended
or modified only by a written instrument signed by the Executive and by a duly authorized representative of the Company. 
 20. Effect on
Other Plans and Agreements. An election by the Executive to resign for Good Reason under the provisions of this Agreement shall not be deemed a voluntary termination of employment by the Executive for the purpose of interpreting the provisions
of any of the Company’s benefit plans, programs or policies. Nothing in this Agreement shall be construed to limit the rights of the Executive under the Company’s benefit plans, programs or policies except as otherwise provided in
Section 8 hereof, and except that the Executive shall have no rights to any severance benefits under any Company severance pay plan, offer letter or otherwise. Except for the Restrictive Covenants Agreement, in the event that the Executive is
party to an agreement with the Company providing for payments or benefits under such plan or agreement and under this Agreement, the terms of this Agreement shall govern and the Executive may receive payment under this Agreement only and not both.
Further, Section 5 and Section 6 of this Agreement are mutually exclusive and in no event shall the Executive be entitled to payments or benefits pursuant to both Section 5 and Section 6 of this Agreement. 

21. Governing Law. This is a Massachusetts contract and shall be construed under and be governed in all respects by the laws of the
Commonwealth of Massachusetts, without giving effect to the conflict of laws principles thereof. With respect to any disputes concerning federal law, such disputes shall be determined in accordance with the law as it would be interpreted and
applied by the United States Court of Appeals for the First Circuit. 
 22. Counterparts. This Agreement may be executed in any number
of counterparts, each of which when so executed and delivered shall be taken to be an original; but such counterparts shall together constitute one and the same document. 

  
 13 

 IN WITNESS WHEREOF, the parties have executed this Agreement effective on the Effective
Date. 
  

			
	 iTEOS THERAPEUTICS, INC.

		
	By:	 	 /s/ Michel Detheux

	Its:	 	 Chief Executive Officer

	
	 EXECUTIVE

	
	 /s/ Matthew Gall

	 Matthew Gall

  
 14 

 Exhibit A 

Restrictive Covenants AgreementEX-10.13

 Exhibit 10.13 

Employee Confidentiality, Assignment, Nonsolicitation and Noncompetition Agreement 

In consideration and as a condition of my employment by between iTeos Therapeutics, Inc. (including its subsidiaries and other affiliates and
its and their successors and assigns, the “Company”) and in exchange for, among other things, my eligibility for certain severance benefits provided in my Employment Agreement to become effective as of the closing of the
Company’s first underwritten public offering of its equity securities pursuant to an effective registration statement under the Securities Act of 1933, as amended (such public offering, the “IPO”), which I acknowledge and agree
is fair and reasonable consideration which is independent from the continuation of my employment, I enter into this Employee Confidentiality, Assignment, Nonsolicitation and Noncompetition Agreement (the “Agreement”), the
effectiveness which is subject to my Employment Agreement referenced above becoming effective, and agree as follows: 
 1. Proprietary
Information. I agree that all information, whether or not in writing, concerning the Company’s business, technology, business relationships or financial affairs that the Company has not released to the general public
(collectively, “Proprietary Information”) and all tangible embodiments thereof are and will be the exclusive property of the Company. By way of illustration, Proprietary Information may include information or material that has not
been made generally available to the public, such as: (a) corporate information, including plans, strategies, methods, policies, resolutions, negotiations or litigation; (b) marketing information, including strategies,
methods, customer or business partner identities or other information about customers, business partners, prospect identities or other information about prospects, or market analyses or projections; (c) financial information, including
cost and performance data, debt arrangements, equity structure, investors and holdings, purchasing and sales data and price lists; (d) operational, technological, or scientific information, including plans, specifications, manuals,
forms, templates, software, pre-clinical and clinical testing data and strategies, research and development strategies, designs, methods, procedures, formulae, data, reports, discoveries, inventions,
improvements, concepts, ideas, know-how, trade secrets, and other Developments (as defined below); and (e) personnel information, including personnel lists, reporting or organizational structure,
resumes, personnel data, performance evaluations and termination arrangements or documents. Proprietary Information also includes information received in confidence by the Company from its customers, suppliers, business partners or other third
parties. 
 2. Recognition of Company’s Rights. I will not, at any time, without the Company’s prior written
permission, either during or after my employment, disclose any Proprietary Information to anyone outside of the Company, or use or permit to be used any Proprietary Information for any purpose other than the performance of my duties as an employee
of the Company. I will cooperate with the Company and use my best efforts to prevent the unauthorized disclosure of all Proprietary Information. I will deliver to the Company all copies and other tangible embodiments of Proprietary Information in my
possession or control upon the earlier of a request by the Company or termination of my employment. 
 3. Rights of Others. I
understand that the Company is now and may hereafter be subject to nondisclosure or confidentiality agreements with third persons that require the Company to protect or refrain from use or disclosure of proprietary information. I agree to be
bound by the terms of such agreements in the event I have access to such proprietary information. I understand that the Company strictly prohibits me from using or disclosing confidential or proprietary information belonging to any other person or
entity (including any employer or former employer), in connection with my employment. In addition, I agree not to bring any confidential information belonging to any other person or entity onto Company premises or into Company workspaces. 

4. Commitment to Company; Avoidance of Conflict of Interest. While an employee of the Company, I will devote my full-time
efforts to the Company’s business and I will not, directly or indirectly, engage in any other business activity, except as expressly authorized in writing and in advance by a duly authorized representative of the Company. I will advise an
authorized officer of the Company or his or her designee at such time as any activity of either the Company or another business presents me with a conflict of interest or the appearance of a conflict of interest as an employee of the Company. I will
take whatever action is requested of me by the Company to resolve any conflict or appearance of conflict which it finds to exist. 

 5. Developments. I will make full and prompt disclosure to the Company of all
inventions, discoveries, designs, developments, methods, modifications, improvements, processes, algorithms, data, databases, computer programs, research, formulae, techniques, trade secrets, graphics or images, and audio or visual works and other
works of authorship, and other intellectual property, including works-in-process (collectively “Developments”) whether or not patentable or
copyrightable, that are created, made, conceived or reduced to practice by me (alone or jointly with others) or under my direction during the period of my employment. I acknowledge that all work performed by me is on a “work for hire”
basis, and I hereby do assign and transfer and, to the extent any such assignment cannot be made at present, will assign and transfer, to the Company (which, for purposes of this sentence, shall be my employing entity unless otherwise specified by
such entity) and its successors and assigns all my right, title and interest in and to all Developments that (a) relate to the business of the Company or its subsidiaries or other affiliates or any customer of, supplier to or business partner
of the Company or its subsidiaries or other affiliates or any of the products or services that have been, are being or will be researched, developed, manufactured or sold by the Company or its subsidiaries or other affiliates or which may be used
with such products or services; or (b) result from tasks assigned to me by the Company or its subsidiaries or other affiliates; or (c) result from the use of premises or personal property (whether tangible or intangible) owned, leased or
contracted for by the Company or its subsidiaries or other affiliates (“Company-Related Developments”), and all related patents, patent applications, trademarks and trademark applications, copyrights and copyright
applications, sui generis database rights and other intellectual property rights in all countries and territories worldwide and under any international conventions (“Intellectual Property Rights”). 

To preclude any possible uncertainty, if there are any Developments that I have, alone or jointly with others, conceived, developed or reduced to practice
prior to the commencement of my employment with the Company that I consider to be my property or the property of third parties and that I wish to have excluded from the scope of this Agreement (“Prior Inventions”), I have set forth
on Exhibit A attached hereto a complete list of those Prior Inventions. If disclosure of any such Prior Invention would cause me to violate any prior confidentiality agreement, I understand that I am not to list such Prior Inventions in Exhibit
A but am only to disclose a cursory name for each such invention, a listing of the party(ies) to whom it belongs and the fact that full disclosure as to such inventions has not been made for that reason. If there are any patents or patent
applications in which I am named as an inventor, other than those that have been assigned to the Company (“Other Patent Rights”), I have also listed those Other Patent Rights on Exhibit A. If no such disclosure is attached, I
represent that there are no Prior Inventions or Other Patent Rights. If, in the course of my employment with the Company, I incorporate a Prior Invention into a Company product, process or machine, research or development program, or other work done
for the Company, I hereby grant to the Company a nonexclusive, royalty-free, fully paid-up, irrevocable, worldwide license (with the full right to sublicense directly and indirectly through multiple tiers) to
make, have made, modify, use, sell, offer for sale and import such Prior Invention. Notwithstanding the foregoing, I will not incorporate, or permit to be incorporated, Prior Inventions in any Company-Related Development without the Company’s
prior written consent. 
 This Agreement does not obligate me to assign to the Company any Development that, in the sole judgment of the Company, reasonably
exercised, is developed entirely on my own time and does not relate to the business efforts or research and development efforts in which, during the period of my employment, the Company actually is engaged or reasonably would be engaged, and does
not result from the use of premises or equipment owned or leased by the Company. However, I will also promptly disclose to the Company any such Developments for the purpose of determining whether they qualify for such exclusion. I understand that to
the extent this Agreement is required to be construed in accordance with the laws of any state which precludes a requirement in an employee agreement to assign certain classes of inventions made by an employee, this Section 5 will be
interpreted not to apply to any invention that a court rules and/or the Company agrees falls within such classes. I also hereby waive all claims to any moral rights or other special rights that I may have or accrue in any Company-Related
Developments. 
 6. Documents and Other Materials. I will keep and maintain adequate and current records of all Proprietary
Information and Company-Related Developments developed by me during my employment, which records will be available to and remain the sole property of the Company at all times. 

All files, letters, notes, memoranda, reports, records, data, sketches, drawings, notebooks, layouts, charts, quotations and proposals, specification sheets,
blueprints, models, prototypes, or other written, photographic or other tangible material containing Proprietary Information, whether created by me or others, which come into my custody or possession, are the exclusive property of the Company to be
used by me only in the performance of my duties for the Company. Any property situated on the Company’s premises and owned by the Company, including without limitation computers, disks and other storage media, filing cabinets or other work
areas, is subject to inspection by 

  
 2 

 
the Company at any time with or without notice. In the event of the termination of my employment for any reason, I will deliver to the Company all Company property and equipment in my possession,
custody or control, including all files, letters, notes, memoranda, reports, records, data, sketches, drawings, notebooks, layouts, charts, quotations and proposals, specification sheets, blueprints, models, prototypes, or other written,
photographic or other tangible material containing Proprietary Information, and other materials of any nature pertaining to the Proprietary Information of the Company and to my work, and will not take or keep in my possession any of the foregoing or
any copies. 
 7. Enforcement of Intellectual Property Rights. I will cooperate fully with the Company, both during and after my
employment with the Company, with respect to the procurement, maintenance and enforcement of Intellectual Property Rights in Company-Related Developments. I will sign, both during and after my employment, all papers, including without limitation
copyright applications, patent applications, declarations, oaths, assignments of priority rights, and powers of attorney, which the Company may deem necessary or desirable in order to protect its rights and interests in any Company-Related
Development or Intellectual Property Rights therein. If the Company is unable, after reasonable effort, to secure my signature on any such papers, I hereby irrevocably designate and appoint each officer of the Company as my agent and attorney-in-fact to execute any such papers on my behalf, and to take any and all actions as the Company may deem necessary or desirable in order to protect its rights and
interests in any Company-Related Development, including any Intellectual Property Rights therein. 
 8. Nonsolicitation and Noncompetition.

 In order to protect the Company’s Proprietary Information and goodwill, during my employment and for a period of: (i) one (1) year
following the date of the cessation of my employment with the Company (the “Last Date of Employment”), or (ii) two (2) years following the Last Date of Employment if I breach my fiduciary duty to the Company or if I have
unlawfully taken, physically or electronically, property belonging to the Company (in either case the “Restricted Period”): 

(a) I shall not, directly or indirectly, in any manner, other than for the benefit of the Company, solicit or transact any business with any of
the customers of the Company. For purposes of this Agreement customers shall include then current customers to which the Company provided products or services during the twelve months prior to the Last Date of Employment (the “One Year
Lookback”) and customer prospects that the Company solicited during the One Year Lookback and that I had significant contact with or learned confidential information about in the course of my employment. 

(b) I shall not, directly or indirectly, in any manner, solicit, entice or attempt to persuade any employee to leave the Company for any reason
or otherwise participate in or facilitate the hire, directly or through another entity, of any person who is then employed by the Company.  

(c) Unless (i) the Company terminates my employment without Cause (as defined below) or I have been laid off; or (ii) the Company
waives the restrictions upon post-employment activities set forth in this Section 8(c), then, the Company shall make garden leave payments to me for the post-employment portion of the Restricted Period (but for not more than 12 months following
the end of my employment) at the rate of 50% of the highest annualized base salary paid to me by the Company within the two-year period preceding the last day of my employment (“Garden Leave
Pay”), and in exchange, I shall not directly or indirectly, whether as owner, partner, shareholder, director, manager, consultant, agent, employee, co-venturer or otherwise, anywhere in the United
States provide any of the types of services that I provided to the Company during the two years that immediately preceded the Last Date of Employment, in connection with any business that manufactures or markets any immuno-oncology therapeutics
targeting adenosine pathway inhibitors or TIGIT, or products or services that the Company or its affiliates, has under development or that are the subject of active planning at any time during my employment; provided, however, provided that this
shall not prohibit any possible investment in publicly traded stock of a company representing less than one percent of the stock of such company. For purposes of this Agreement, and notwithstanding anything to the contrary in any other agreement
between the Company and me, “Cause” shall mean a reasonable and good faith basis for the Company to be dissatisfied with my job performance, my conduct or my behavior. I acknowledge that this covenant is necessary because the
Company’s legitimate business interests cannot be adequately protected solely by the other covenants in this Agreement. I further acknowledge and agree that any payments I receive pursuant to this Section 8(c) shall reduce (and shall not
be in addition to) any severance or separation pay that I am otherwise entitled to receive from the Company pursuant to an agreement, plan or otherwise.

  
 3 

 9. Government Contracts. I acknowledge that the Company may have from time to
time agreements with other persons or with the United States Government or its agencies that impose obligations or restrictions on the Company regarding inventions made during the course of work under such agreements or regarding the confidential
nature of such work. I agree to comply with any such obligations or restrictions upon the direction of the Company. In addition to the rights assigned under Section 5, I also assign to the Company (or any of its nominees) all rights that I have
or acquired in any Developments, full title to which is required to be in the United States under any contract between the Company and the United States or any of its agencies. 

10. Prior Agreements. I hereby represent that, except as I have fully disclosed previously in writing to the Company, I am not
bound by the terms of any agreement with any previous or current employer or other party to refrain from using or disclosing any trade secret or confidential or proprietary information in the course of my employment with the Company or to refrain
from competing, directly or indirectly, with the business of such employer or any other party. I further represent that my performance of all the terms of this Agreement as an employee of the Company does not and will not breach any agreement to
keep in confidence proprietary information, knowledge or data acquired by me in confidence or in trust prior to my employment with the Company. I will not disclose to the Company or induce the Company to use any confidential or proprietary
information or material belonging to any previous employer or others. 
 11. Remedies Upon Breach. I understand that the
restrictions contained in this Agreement are necessary for the protection of the business and goodwill of the Company and I consider them to be reasonable for such purpose. Any breach of this Agreement is likely to cause the Company substantial and
irrevocable damage and therefore, in the event of such breach, the Company, in addition to such other remedies which may be available, will be entitled to specific performance and other injunctive relief, without the posting of a bond. I
further acknowledge that a court may render an award extending the Restricted Period as one of the remedies in the event of my violation of this Agreement. If I violate this Agreement, in addition to all other remedies available to the Company at
law (including, without limitation, the Company’s right to discontinue any payments I may receive pursuant to Section 8(c)), in equity, and under contract, I agree that I am obligated to pay all the Company’s costs of enforcement of
this Agreement, including reasonable attorneys’ fees and expenses. 
 12. Use of Voice, Image and Likeness. I give the Company
permission to use any and all of my voice, image and likeness, with or without using my name, in connection with the products and/or services of the Company, for the purposes of advertising and promoting such products and/or services and/or the
Company, and/or for other purposes deemed appropriate by the Company in its reasonable discretion, except to the extent prohibited by law. 
 13.
No Employment Obligation. I understand that this Agreement does not create an obligation on the Company or any other person to continue my employment. I acknowledge that, unless otherwise agreed in a formal written
employment agreement signed on behalf of the Company by an authorized officer, my employment with the Company is at will and therefore may be terminated by the Company or me at any time and for any reason, with or without cause. 

14. Survival and Assignment by the Company. I understand that my obligations under this Agreement will continue in accordance with
its express terms regardless of any changes in my title, position, duties, salary, compensation or benefits or other terms and conditions of employment. I further understand that my obligations under this Agreement will continue following the
termination of my employment regardless of the manner of such termination and will be binding upon my heirs, executors and administrators. The Company will have the right to assign this Agreement to its affiliates, successors and assigns. I
expressly consent to be bound by the provisions of this Agreement for the benefit of the Company or any parent, subsidiary or affiliate to whose employ I may be transferred without the necessity that this Agreement be resigned at the time of such
transfer. 
 15. Post-Employment Notifications. During the Restricted Period, I will notify the Company of any change in my
address and of each subsequent employment or business activity, including the name and address of my employer or other post-Company employment plans and the nature of my activities. 

  
 4 

 16. Disclosures During Restricted Period. I will provide a copy of this
Agreement to any person or entity with whom I may enter into a business relationship, whether as an employee, consultant, partner, coventurer or otherwise, prior to entering into such business relationship during the Restricted Period. 

17. Waiver. The Company and I acknowledge and agree that the Company’s election not to provide me with
Garden Leave Pay as set forth in Section 8(c) shall be deemed a waiver of my noncompetition obligations under Section 8(c). Otherwise, no waiver of any of my obligations under this Agreement shall be effective unless made in writing by the
Company. The failure of the Company to require my performance of any term or obligation of this Agreement, or the waiver of any breach of this Agreement, shall not prevent the Company’s subsequent enforcement of such term or obligation or be
deemed a waiver of any subsequent breach. 
 18. Severability. In case any provisions (or portions thereof) contained in this
Agreement shall, for any reason, be held invalid, illegal or unenforceable in any respect, such invalidity, illegality or unenforceability shall not affect the other provisions of this Agreement, and this Agreement shall be construed as if such
invalid, illegal or unenforceable provision had never been contained herein. If, moreover, any one or more of the provisions contained in this Agreement shall for any reason be held to be excessively broad as to duration, geographical scope,
activity or subject, it shall be construed by limiting and reducing it, so as to be enforceable to the extent compatible with the applicable law as it shall then appear. 

19. Choice of Law and Jurisdiction. This Agreement will be deemed to be made and entered into in the Commonwealth of Massachusetts,
and will in all respects be interpreted, enforced and governed under the laws of the Commonwealth of Massachusetts. I hereby consent to the exclusive jurisdiction of the state and federal courts situated within Massachusetts for purposes of
enforcing this Agreement or for any other lawsuit relating to or arising under this Agreement, and I hereby waive any objection that I might have to personal jurisdiction or venue in those courts, provided, however, the Company and I agree that all
civil actions relating to Section 8(c) of this Agreement shall be brought in the county of Suffolk and that the superior court or the business litigation session of the superior court shall have exclusive jurisdiction. 

20. Independence of Obligations. My obligations under this Agreement are independent of any obligation, contractual or otherwise, the
Company has to me. The Company’s breach of any such obligation shall not be a defense against the enforcement of this Agreement or otherwise limit my obligations under this Agreement. 

21. Protected Disclosures. I understand that nothing contained in this Agreement limits my ability to communicate with any federal,
state or local governmental agency or commission, including to provide documents or other information, without notice to the Company. I also understand that nothing in this Agreement limits my ability to share compensation information concerning
myself or others, except that this does not permit me to disclose compensation information concerning others that I obtain because my job responsibilities require or allow access to such information. 

22. Defend Trade Secrets Act of 2016. I understand that pursuant to the federal Defend Trade Secrets Act of 2016, I 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. 

23. Entire Agreement; Amendment. This Agreement constitutes the entire agreement between the Company and me with respect to the
subject matter hereof, and supersedes all prior agreements or understandings, both written and oral, between the Company and me with respect to the subject matter hereof, but does not in any way merge with or supersede any other confidentiality,
assignment of inventions or other restrictive covenant agreement or obligation entered into by the Company and me, which agreements and obligations shall supplement, and shall not limit or be limited by, this Agreement. This Agreement may be amended
only in a written agreement executed by a duly authorized officer of the Company and me. 
 [Remainder of Page Intentionally Left Blank] 

  
 5 

 I UNDERSTAND THAT THIS AGREEMENT AFFECTS IMPORTANT RIGHTS. BY SIGNING BELOW, I CERTIFY THAT
(I) I WAS PROVIDED WITH THIS AGREEMENT AT LEAST TEN (10) BUSINESS DAYS BEFORE THE EFFECTIVE DATE OF THIS AGREEMENT AND (II) I HAVE BEEN ADVISED BY THE COMPANY THAT I HAVE THE RIGHT TO CONSULT WITH COUNSEL PRIOR TO SIGNING THIS
AGREEMENT.     
 IN WITNESS WHEREOF, the undersigned has executed this Agreement as a sealed instrument and shall become
effective upon the latest to occur of the following (i) full execution by both parties; (ii) ten (10) business days after the Company provided me with notice of this Agreement; or (iii) the Employment Agreement referenced at the
beginning of this Agreement becoming effective. 
 EMPLOYEE 

Signed: __________________________________________________________ 

Type or print name: _____________________ 
 Date:
__________________ 
 iTEOS THERAPEUTICS, INC. 
 Signed:
__________________________________________________________ 
 Type or print name and job title: _____________________ 

Date: __________________ 

 EXHIBIT A 
  

	To:	 COMPANY 

From: ____________________ 
 Date: _____________________ 

SUBJECT: Prior Inventions 
 The following
is a complete list of all inventions or improvements relevant to the subject matter of my employment by the Company that have been made or conceived or first reduced to practice by me alone or jointly with others prior to my engagement by the
Company: 
  

			
	         ☐	  	No inventions or improvements
		
	         ☐	  	See below:
		
		  	                                      
                                         
             
		
		  	                                      
                                         
             
		
		  	                                      
                                         
             
		
	         ☐	  	Additional sheets attached
	
	 The following is a list of all patents and patent applications in which I have been named as an
inventor:

		
	         ☐	  	None
		
	         ☐	  	See below:

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