Document:

EX-4.3

 Exhibit 4.3 

MERUS N.V. 

NON-EXECUTIVE DIRECTOR COMPENSATION PROGRAM 

The non-executive directors (the “Non-Executive
Directors” and each, a “Non-Executive Director”) of Merus N.V. (the “Company”) shall receive cash and equity compensation as set forth
in this Non-Executive Director Compensation Program (this “Program”). The compensation described in this Program shall be paid or be made, as applicable, automatically and without
further action of the Board of Directors (the “Board”) or the general meeting of shareholders (the “General Meeting”) of the Company, to each Non-Executive
Director who is entitled to receive such cash or equity compensation, unless such Non-Executive Director declines the receipt of such cash or equity compensation by written notice to the Company. This Program
shall remain in effect until it is revised or rescinded by further action taken by the Board at the recommendation of the Compensation Committee. This Program may be amended, modified or terminated at any time by action taken by the Board at the
recommendation of the Compensation Committee. The terms and conditions of this Program shall supersede any prior cash and/or equity compensation arrangements for service as a Non-Executive Director (or as a
supervisory director) between the Company and any of its Non-Executive Directors. 
 Time spent in
office and service as a supervisory director of the Company prior to [date of implementation of governance change] shall, for purposes of this Program, be considered to be time spent in office and service as Non-Executive Director. 
 I. CASH COMPENSATION 

A. Annual Retainers. Each Non-Executive Director shall receive an annual retainer of $35,000 for
service on the Board. 
 B. Additional Annual Retainers. In addition, each Non-Executive
Director shall receive the following annual retainers: 
 1. Chairperson of the Board. A
Non-Executive Director serving as Chairperson of the Board shall receive an additional annual retainer of $28,000 for such service. 

2. Audit Committee. A Non-Executive Director serving as Chairperson of the Audit Committee
shall receive an additional annual retainer of $15,000 for such service. A Non-Executive Director serving as a member other than the Chairperson of the Audit Committee shall receive an additional annual
retainer of $7,500 for such service. 
 3. Compensation Committee. A Non-Executive Director
serving as Chairperson of the Compensation Committee shall receive an additional annual retainer of $10,000 for such service. A Non-Executive Director serving as a member other than the Chairperson of the
Compensation Committee shall receive an additional annual retainer of $5,000 for such service. 
 4. Nominating and Corporate Governance
Committee. A Non-Executive Director serving as Chairperson of the Nominating and Corporate Governance Committee shall receive an additional annual retainer of $7,500 for such service. A Non- 

Executive Director serving as a member other than the Chairperson of the Nominating and Corporate Governance Committee shall receive an additional annual
retainer of $3,750 for such service. 

  
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 C. Payment of Retainers. The annual retainers described in Sections I(A) and I(B) shall be
earned on a quarterly basis based on a calendar quarter and shall be paid in cash by the Company in arrears not later than the fifteenth day following the end of each calendar quarter. In the event a
Non-Executive Director does not serve as a Non-Executive Director, or in the applicable positions described in Section I(B), for an entire calendar quarter, the retainer
paid to such Non-Executive Director shall be prorated for the portion of such calendar quarter actually served as a Non-Executive Director, or in such position, as
applicable. 
 D. Annual Increase. Each annual retainer described in Sections I(A) and I(B) shall, without further action taken by the
Board or the General Meeting, automatically increase on the first day of each calendar year beginning on January 1, 2017 by an amount equal to 3% of the value of such annual retainer in effect as of the immediately preceding calendar year. 

II. EQUITY COMPENSATION 

Non-Executive Directors shall be eligible to be granted the equity awards described below. The awards
described below shall be granted under and shall be subject to the terms and provisions of the Company’s 2016 Incentive Award Plan or any other applicable Company equity incentive plan then-maintained by the Company (the “Equity
Plan”) and shall be granted subject to award agreements in substantially the form previously approved by the Board. All applicable terms of the Equity Plan apply to this Program as if fully set forth herein,
and all grants of stock options hereby are subject in all respects to the terms of the Equity Plan and the applicable award agreement. 
 A.
Initial Awards. Each Non-Executive Director who is initially elected or appointed to the Board after the date of the effectiveness of the Company’s Registration Statement on Form F-1 relating to the initial public offering of common shares (the “Effective Date”) shall be eligible to receive an option to purchase the number of
common shares of the Company having an aggregate Grant Date Fair Value (as defined below) of $200,000, with any partial shares that result being rounded down to the nearest whole share. The awards described in this Section II(A) shall be referred to
as “Initial Awards.” No Non-Executive Director shall be granted more than one Initial Award. “Grant Date Fair Value”
shall mean the value of the option as of the date of grant, which value shall be determined using a Black-Scholes option pricing model and the valuation assumptions used by the Company in accounting for options as of such date; provided, that the
fair market value of the common shares of the Company used in such calculation shall be based on the average trading price of the common shares of the Company over the preceding thirty day period. 

B. Subsequent Awards. A Non-Executive Director who (i) has been serving as a Non-Executive Director for at least six months as of the date of any annual General Meeting after the Effective Date and (ii) will continue to serve as a Non-Executive
Director immediately following such meeting, is eligible to be granted, at the occasion of or as soon as practically possible following such annual General Meeting an option to purchase the number of common 

  
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shares of the Company having an aggregate Grant Date Fair Value of $100,000, with any partial shares that result being rounded down to the nearest whole share. The awards described in this
Section II(B) shall be referred to as “Subsequent Awards.” For the avoidance of doubt, a Non-Executive Director elected for the first time to the Board at an annual
General Meeting shall only receive an Initial Award in connection with such election, and shall not receive any Subsequent Award on the date of such meeting as well. 

For the avoidance of doubt, any grant of Initial Awards and Subsequent Awards under this Program will require a written notice of acceptance of
the relevant Non-Executive Director, in the absence of which such Non-Executive Director will be deemed to have waived its rights to such a grant. 

C. Terms of Awards Granted to Non-Executive Directors 

1. Exercise Price. The per share exercise price of each option granted to a Non-Executive
Director shall equal the Fair Market Value (as defined in the Equity Plan) of a common share of the Company on the date the option is granted. 

2. Vesting. Each Initial Award shall vest and become exercisable as to 33% of the shares subject to such Initial Award on the first
anniversary of the date of grant and in 24 substantially equal monthly installments thereafter, such that the Initial Award shall be fully vested on the third anniversary of the date of grant, subject to the
Non-Executive Director continuing in service as a Non-Executive Director through each such vesting date. Each Subsequent Award shall vest and become exercisable in 12
substantially equal monthly installments following the date of grant, such that the Subsequent Award shall be fully vested on the first anniversary of the date of grant, subject to the Non-Executive Director
continuing in service on the Board as a Non-Executive Director through each such vesting date. Any portion of an Initial Award or Subsequent Award which is unvested or unexercisable at the time of a Non-Executive Director’s termination of service on the Board shall be immediately forfeited upon such termination of service and shall not thereafter become vested and exercisable. All of a Non-Executive Director’s Initial Awards and Subsequent Awards shall vest in full immediately prior to the occurrence of a Change in Control (as defined in the Equity Plan), to the extent outstanding at such
time. 
 3. Term. The maximum term of each stock option granted to a Non-Executive Director
hereunder shall be ten (10) years from the date the option is granted. 
 D. Annual Increase; Award Limit. The Grant Date Fair
Value of each Initial Award and Subsequent Award described in Sections II(A) and II(B) shall, subject to approval by the Board, increase on the first day of each calendar year beginning on January 1, 2017 by an amount equal to 3% of the Grant
Date Fair Value applicable to Initial Awards and Subsequent Awards in effect as of the immediately preceding calendar year; provided, that, in no event shall the number of shares awarded pursuant to (i) an Initial Award exceed 17,000 common
shares of the Company and (ii) a Subsequent Award exceed 8,500 common shares of the Company, in each case, subject to adjustment as provided in the Equity Plan, including without limitation with respect to any share dividend, share split,
reverse share split or other similar event affecting the common shares of the Company that is effected prior to the Effective Date. 

  
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 E. Tax deductions. To the extent required to comply with applicable tax laws, the Company
shall be allowed to make necessary deductions on any compensation payable under this Program, including (without limitation) for purposes of any payroll tax or income tax. 

F. Prevailing terms. In the event of any inconsistency between the terms of the Merus N.V. 2016 Incentive Award Plan and this Program,
the terms of this Program shall prevail. 
 * * * * * 

  
 4EX-4.7

 Exhibit 4.7 

EMPLOYMENT AGREEMENT 

This Employment Agreement (this “Agreement”), dated as of December 16, 2015, is made by and between Merus B.V., a Dutch
private, limited liability company (together with any successors or assigns, the “Company”), and Hui Liu (the “Executive”) (collectively referred to herein as the “Parties”). 

RECITALS 
  

	(A)	It is the desire of the Company to assure itself of the services of Executive beginning on and following December 16, 2015, or such earlier date as may be determined by the Company and Executive (the “Effective
Date”), by entering into this Agreement. 

  

	(B)	Executive and the Company mutually desire that Executive provide services to the Company on the terms herein provided. 

AGREEMENT 
 NOW,
THEREFORE, in consideration of the foregoing and of the respective covenants and agreements set forth below, the Parties hereto agree as follows: 
 1.
Employment. 
 (a) General. Effective as of the Effective Date, the Company shall employ Executive and Executive shall
remain in the employ of the Company, for the period and in the position set forth in this Section 1, and subject to the other terms and conditions herein provided. 

(b) At-Will Employment. The Company and Executive acknowledge that Executive’s employment
is at-will, as defined under applicable law, and that Executive’s employment with the Company may be terminated by either Party at any time for any or no reason (subject to the notice requirements of
Section 3(b)). This “at-will” nature of Executive’s employment shall remain unchanged during Executive’s tenure as an employee and may not be changed, except in an express
writing signed by Executive and a duly authorized officer of the Company. If Executive’s employment terminates for any reason, Executive shall not be entitled to any payments, benefits, damages, award or compensation other than as provided in
this Agreement or otherwise agreed to in writing by the Company or as provided by applicable law. The period of Executive’s employment by the Company shall be referred to herein as the “Term”. 

(c) Position; Duties and Location. Executive shall serve as Executive Vice President, Chief Business Officer of the Company, with such
responsibilities, duties and authority normally associated with such positions and as may from time to time be assigned to Executive by the Chief Executive Officer of the Company or the Management Board or the Supervisory Board of the Company
(either one, the “Board”). Executive’s normal place of work shall be at the Company’s office in the Boston, Massachusetts metropolitan area, which the Company expects to establish prior to or shortly following the
Effective Date. Executive shall devote substantially all of Executive’s working time and efforts to the business and affairs of the Company (which shall include service to its affiliates, if applicable) and shall not engage in outside business

 
activities (including serving on outside boards or committees) without the consent of the Board, provided that Executive shall be permitted to (i) manage Executive’s personal, financial and
legal affairs, (ii) participate in trade associations, and (iii) serve on the board of directors of not-for-profit or tax-exempt charitable organizations, in
each case, subject to compliance with this Agreement and provided that such activities do not materially interfere with Executive’s performance of Executive’s duties and responsibilities hereunder. Executive agrees to observe and comply
with the rules and policies of the Company as adopted by the Company from time to time, in each case as amended from time to time, as set forth in writing, and as delivered or made available to Executive (each, a “Policy”). 

2. Compensation and Related Matters. 

(a) Annual Base Salary. During the Term, Executive shall receive a base salary at a rate of $335,000 per annum, which shall be paid in
accordance with the customary payroll practices of the Company and shall be pro-rated for partial years of employment. Such Annual Base Salary shall be reviewed (and may be adjusted) from time to time by the
Board (such annual base salary, as it may be adjusted from time to time, the “Annual Base Salary”). 
 (b) Bonus.
During the Term, Executive will be eligible to participate in an annual incentive program established by the Board. Executive’s annual incentive compensation under such incentive program (the “Annual Bonus”) shall be targeted
at 35% of his Annual Base Salary. The Annual Bonus payable under the incentive program shall be based on the achievement of performance goals to be determined by the Board and may be pro-rated for
Executive’s first year of employment with the Company. The payment of any Annual Bonus pursuant to the incentive program shall be subject to Executive’s continued employment with the Company through the date of payment. 

(c) Equity Award. Subject to Board approval, the Company will grant to Executive a stock option or similar equity award (the
“Option”) under the Company’s equity plan then in effect (the “Plan”) for the purchase of 176,553 common shares of the Company (the “Common Shares”), which currently equals 1% of the
fully-diluted equity securities of the Company, at a price per share equal to the fair market value of such Common Shares, as determined by the Board, at the time of grant. The current fair market value of a Common Share is €4.00. The Option
will be subject to a four-year vesting schedule, under which the Option will vest as to twenty-five percent (25%) of the shares subject to the Option on first anniversary of the Effective Date and as to the remaining shares in substantially equal
quarterly calendar instalments over the following three years, subject to Executive’s continued employment with the Company on the applicable vesting date and potential accelerated vesting as set forth in Section 4(b) and
Section 4(c). Notwithstanding the foregoing, the Option will in all events be subject to the terms and conditions of the Plan and a stock option agreement to be entered into between the Company and Executive. Executive shall be eligible
to receive additional equity awards at the discretion of the Board. 
 (d) Benefits. During the Term, Executive shall be eligible to
participate in employee benefit plans, programs and arrangements of the Company (including medical, dental, vision, life insurance, disability insurance and defined contribution 401(k) plan) made available to other similarly-situated employees of
the Company, consistent with the terms thereof and as such 

  
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plans, programs and arrangements may be amended from time to time. Notwithstanding the foregoing, if the Company does not maintain any “group health plan” (within the meaning of
Section 4980B of the Internal Revenue Code and the regulations thereunder (“COBRA”)) for its U.S. employees as of the Effective Date, then, subject to Executive’s valid election to receive COBRA benefits under the health
plans of Executive’s prior employer, during the period beginning on the Effective Date and ending on the first to occur of: (i) the date on which the Company adopts or otherwise makes generally available to its U.S. employees a group
health plan or (ii) the date on which Executive terminates employment with the Company, the Company shall reimburse Executive for the actual cost of healthcare premiums incurred by Executive under the group health plan of Executive’s prior
employer pursuant to COBRA, subject to proper substantiation of such costs in accordance with applicable Company Policy no later than sixty (60) days after such costs are incurred; provided, that, in the event the period of time during which
Executive is entitled to continuation coverage under the group health plan of Executive’s prior employer pursuant to COBRA expires prior to the Company adopting or otherwise making available a group health plan to its U.S. employees, the
Company shall continue to pay Executive for healthcare costs in an amount equal to the cost of healthcare premiums incurred by Executive under the group health plan of Executive’s prior employer pursuant to COBRA based on the last month of the
COBRA period. Such costs shall be reimbursed promptly, but in no event later than sixty (60) days following proper substantiation thereof. 

(e) Vacation. During the Term, Executive shall be entitled to no less than four (4) weeks of paid personal leave per calendar year
in accordance with the Company’s paid time off Policies. Any vacation shall be taken at the reasonable and mutual convenience of the Company and Executive. 

(f) Business Expenses. During the Term, the Company shall reimburse Executive for all reasonable travel and other business expenses
incurred by Executive in the performance of Executive’s duties to the Company in accordance with the Company’s expense reimbursement Policy. 

(g) Relocation. 
 (i)
Temporary Living Expenses. Beginning on the Effective Date and ending on the date in which Executive secures permanent housing in the Boston, Massachusetts metropolitan area, but in no event for a period greater than six (6) months
following the Effective Date, the Company shall pay Executive $5,000 per month to help offset Executive’s temporary living expenses in the Boston, Massachusetts metropolitan area. 

(ii) Relocation Expenses. The Company shall reimburse Executive up to a maximum amount of $50,000 for reasonable, documented moving
expenses incurred prior to December 15, 2017 as a result of Executive’s relocation to the Boston, Massachusetts area, which relocation expense reimbursement will be paid (subject to all tax withholdings which the Company reasonably determines
are required) in calendar year 2017, regardless of when such expenses are actually incurred, and following Executive’s timely submission of documentation reasonably requested by the Company. 

  
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 (iii) Repayment. In the event Executive’s employment with the Company is terminated
by the Company for Cause (as defined below) or by the Executive for any reason, in either case, prior to the first anniversary of the date the applicable relocation expense was incurred, Executive shall immediately repay to the Company a prorated
portion of such relocation expense reimbursement in an amount determined by multiplying (x) the amount of any relocation expense reimbursement paid to Executive pursuant to Section 2(g)(ii) within the one (1) year period prior
to such termination by (x) a fraction, the numerator of which is the number of calendar days remaining from the date of Executive’s termination to the first anniversary of the date the applicable relocation expense was incurred and the
denominator of which is 365. 
 (h) Key Person Insurance. At any time during the Term, the Company shall have the right to insure the
life of Executive for the Company’s sole benefit. The Company shall have the right to determine the amount of insurance and the type of policy. Executive shall reasonably cooperate with the Company in obtaining such insurance by submitting to
physical examinations, by supplying all information reasonably required by any insurance carrier, and by executing all necessary documents reasonably required by any insurance carrier, provided that any information provided to an insurance company
or broker shall not be provided to the Company without the prior written authorization of Executive. Executive shall incur no financial obligation by executing any required document, and shall have no interest in any such policy. 

3. Termination. 
 (a)
Circumstances. Executive’s employment hereunder may be terminated by the Company or Executive, as applicable, without any breach of this Agreement, at any time, under the following circumstances: 

(i) Death. Executive’s employment hereunder shall terminate upon Executive’s death. 

(ii) Disability. If Executive has incurred a Disability, as defined below, the Company may terminate Executive’s
employment. 
 (iii) Termination for Cause. The Company may terminate Executive’s employment for Cause, as
defined below. 
 (iv) Termination without Cause. The Company may terminate Executive’s employment without Cause.

 (v) Resignation from the Company for Good Reason. Executive may resign Executive’s employment with the
Company for Good Reason, as defined below. 
 (vi) Resignation from the Company Without Good Reason. Executive
may resign Executive’s employment with the Company for any reason other than Good Reason or for no reason. 

  
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 (b) Notice of Termination. Any termination of Executive’s employment by the Company
or by Executive under this Section 3 (other than termination pursuant to Section 3(a)(i)) shall be communicated by a written notice to the other party hereto (i) indicating the specific termination provision in this
Agreement relied upon, (ii) setting forth in reasonable detail the facts and circumstances claimed to provide a basis for termination of Executive’s employment under the provision so indicated, if applicable, and (iii) specifying a
Date of Termination which, if submitted by Executive, shall be at least thirty (30) days following the date of such notice (a “Notice of Termination”); provided, however, that in the event that Executive delivers a
Notice of Termination to the Company, the Company may, in its sole discretion, change the Date of Termination to any date that occurs following the date of Company’s receipt of such Notice of Termination and is prior to the date specified in
such Notice of Termination. A Notice of Termination submitted by the Company may provide for a Date of Termination on the date Executive receives the Notice of Termination, or any date thereafter elected by the Company in its sole discretion. The
failure by the Company or Executive to set forth in the Notice of Termination any fact or circumstance which contributes to a showing of Cause or Good Reason shall not waive any right of such Party hereunder or preclude such Party from asserting
such fact or circumstance in enforcing such Party’s rights hereunder. 
 (c) Company Obligations upon Termination. Upon
termination of Executive’s employment pursuant to this Section 3, Executive (or Executive’s estate) shall be entitled to receive the sum of: (i) the portion of Executive’s Annual Base Salary earned through the Date of
Termination, but not yet paid to Executive; (ii) any expenses owed to Executive pursuant to Section 2(f); and (iii) any amount accrued and arising from Executive’s participation in, or benefits accrued under any employee
benefit plans, programs or arrangements, which amounts shall be payable in accordance with the terms and conditions of such employee benefit plans, programs or arrangements (collectively, the “Company Arrangements”). Except as
otherwise expressly required by law (e.g., COBRA) or as specifically provided herein, all of Executive’s rights to salary, severance, benefits, bonuses and other compensatory amounts hereunder (if any) shall cease upon the termination of
Executive’s employment hereunder. In the event that Executive’s employment is terminated by the Company for any reason, Executive’s sole and exclusive remedy shall be to receive the payments and benefits described in this
Section 3(c) or Section 4, as applicable 
 (d) Deemed Resignation. Upon termination of Executive’s
employment for any reason, Executive shall be deemed to have resigned from all offices and directorships, if any, then held with the Company or any of its affiliates. 

4. Severance Payments. 
 (a)
Termination for Cause, or Termination Upon Death, Disability or Resignation from the Company Without Good Reason. If Executive’s employment shall terminate as a result of Executive’s death pursuant to Section 3(a)(i) or
Disability pursuant to Section 3(a)(ii), pursuant to Section 3(a)(iii) for Cause, or pursuant to Section 3(a)(vi) for Executive’s resignation from the Company without Good Reason, then Executive shall not be
entitled to any severance payments or benefits, except as provided in Section 3(c). 

  
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 (b) Termination without Cause or Resignation from the Company for Good Reason. If
Executive’s employment is terminated by the Company without Cause pursuant to Section 3(a)(iv) or pursuant to Section 3(a)(v) due to Executive’s resignation for Good Reason, in either case, which termination does not occur within
one year following the date of a Change in Control, then, subject to Executive signing on or before the 2lst day following Executive’s Separation from Service (as defined below), and not revoking, a release of claims in substantially the form
attached hereto as Exhibit A (the “Release”), and Executive’s continued compliance with the terms of the Proprietary Information Agreement (as defined below), Executive shall receive, in addition to payments and benefits set forth in
Section 3(c), (i) an amount in cash equal to 0.5 times the Annual Base Salary, payable in the form of salary continuation in regular instalments over the six-month period following Executive’s
Separation from Service in accordance with the Company’s customary payroll practices and (ii) in the discretion of the Board, accelerated vesting (in whole or in part) of any portion of the Option that is unvested as of the Date of
Termination. 
 (c) Change in Control. Notwithstanding anything to the contrary in Section 4(b), in the event
Executive’s employment is terminated by the Company without Cause pursuant to Section 3(a)(iv) or pursuant to Section 3(a)(v) due to Executive’s resignation for Good Reason, in either case, within one year following
the date of a Change in Control, then, subject to Executive signing on or before the 21st day following Executive’s Separation from Service, and not revoking, the Release, and Executive’s continued compliance with the terms of the
Proprietary Information Agreement, Executive shall receive, in addition to payments and benefits set forth in Section 3(c), the following: 

(i) an amount in cash equal to 0.5 times the sum of (A) the Annual Base Salary and (B) the Annual Bonus at the target amount, which
amount shall be paid in a lump sum on the First Payment Date (as defined below); 
 (ii) if Executive elects to receive continued medical,
dental or vision coverage under one or more of the Company’s group healthcare plans pursuant to COBRA, the Company shall directly pay, or reimburse Executive for, the COBRA premiums for Executive and Executive’s covered dependents under
such plans during the period commencing on Executive’s Separation from Service and ending upon the earliest of (X) the date that is nine (9) months following Executive’s Separation from Service, (Y) the date that Executive
and/or Executive’s covered dependents become no longer eligible for COBRA or (Z) the date Executive becomes eligible to receive healthcare coverage from a subsequent employer. Notwithstanding the foregoing, if the Company determines in its
sole discretion that it cannot provide the foregoing benefit without potentially violating applicable law or incurring an excise tax (including, without limitation, by reason of Section 2716 of the Public Health Service Act), the Company shall
in lieu thereof provide to Executive a taxable monthly payment in an amount equal to the monthly COBRA premium that Executive would be required to pay to continue Executive’s and Executive’s covered dependents’ group health coverage
in effect on the Date of Termination (which amount shall be based on the premium for the first month of COBRA coverage), less the amount the Executive would have had to pay to receive group health coverage for Executive and Executive’s covered
dependents based on the cost sharing levels in effect on the Date of Termination, which payments shall be made regardless of whether Executive elects COBRA continuation coverage and shall commence in the month following the month in which the Date
of Termination occurs and shall end on the earlier of (X) the last day of the nine (9) month period following Executive’s Separation from Service, (Y) the date that Executive and/or Executive’s covered dependents become no
longer eligible for COBRA or (Z) the date Executive becomes eligible to receive healthcare coverage from a subsequent employer; and 

  
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 (iii) accelerated vesting of any portion of the Option that is unvested as of the Date of
Termination. 
 5. Employee Proprietary Information and Inventions Assignment Agreement. 

Executive acknowledges and agrees that, contemporaneously with the execution of this Agreement, Executive shall execute and agree to be bound
by the terms of the Company’s Employee Proprietary Information and Inventions Assignment Agreement (the “Proprietary Information Agreement”), which Proprietary Information Agreement contains certain non-competition, non-solicitation, non-disclosure and assignment of inventions provisions in favor of the Company. 

6. Assignment and Successors. 
 The
Company may assign its rights and obligations under this Agreement to any of its affiliates, including, without limitation, any Company entity established in the United States, or to any successor to all or substantially all of the business or the
assets of the Company (by merger or otherwise), and may assign or encumber this Agreement and its rights hereunder as security for indebtedness of the Company and its affiliates. Notwithstanding the foregoing, in the event the Company assigns its
rights and obligations under this Agreement to a Company entity established in the United States, the term “Board” shall continue to refer to either of the Management Board or Supervisory Board of Merus B.V. (or any successor
thereto). This Agreement shall be binding upon and inure to the benefit of the Company, Executive and their respective successors, assigns, personnel and legal representatives, executors, administrators, heirs, distributees, devisees, and legatees,
as applicable. None of Executive’s rights or obligations may be assigned or transferred by Executive, other than Executive’s rights to payments hereunder, which may be transferred only by will or operation of law. Notwithstanding the
foregoing, Executive shall be entitled, to the extent permitted under applicable law and applicable Company Arrangements, to select and change a beneficiary or beneficiaries to receive compensation hereunder following Executive’s death by
giving written notice thereof to the Company. 
 7. Certain Definitions. 

(a) Cause. The Company shall have “Cause” to terminate Executive’s employment hereunder upon: 

(i) Executive’s failure to (A) substantially perform his duties with the Company (other than any such failure resulting from
Executive’s Disability) or (B) comply with, in any material respect, any of the Company’s Policies; 
 (ii) the Board’s
determination that Executive failed in any material respect to carry out or comply with any lawful and reasonable directive of the Board; 

  
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 (iii) Executive’s breach of a material provision of this Agreement or the Proprietary
Information Agreement; 
 (iv) Executive’s conviction, plea of no contest, plea of nolo contendere, or imposition of unadjudicated
probation for any felony or crime involving moral turpitude; 
 (v) Executive’s unlawful use (including being under the influence) or
possession of illegal drugs on the Company’s (or any of its affiliate’s) premises or while performing Executive’s duties and responsibilities under this Agreement; or 

(vi) Executive’s commission of an act of fraud, embezzlement, misappropriation, willful misconduct, or breach of fiduciary duty against
the Company or any of its affiliates. 
 (b) Change in Control. “Change in Control” shall mean and include each of
the following: 
 (i) A transaction or series of related transactions (other than an offering of Common Shares to the general public through
a registration statement filed with the Securities and Exchange Commission or a transaction or series of related transactions that meets the requirements of clauses (A) and (B) of subsection (ii) below) whereby any “person” or related
“group” of “persons” (as such terms are used in Sections 13(d) and 14(d)(2) of the Securities Exchange Act of 1934 (the “Exchange Act”)) (other than the Company, any of its subsidiaries, an employee benefit plan
maintained by the Company or any of its subsidiaries or a “person” that, prior to such transaction, directly or indirectly controls, is controlled by, or is under common control with, the Company) directly or indirectly acquires beneficial
ownership (within the meaning of Rule 13d-3 under the Exchange Act) of securities of the Company possessing more than 50% of the total combined voting power of the Company’s securities outstanding immediately after such acquisition; or 

(ii) The consummation by the Company (whether directly involving the Company or indirectly involving the Company through one or more
intermediaries) of (x) a merger, consolidation, reorganization, or business combination or (y) a sale or other disposition of all or substantially all of the Company’s assets in any single transaction or series of related transactions or (z)
the acquisition of assets or stock of another entity, in each case other than a transaction: 
 (A) which results in the
Company’s voting securities outstanding immediately before the transaction continuing to represent (either by remaining outstanding or by being converted into voting securities of the Company or the person that, as a result of the transaction,
controls, directly or indirectly, the Company or owns, directly or indirectly, all or substantially all of the Company’s assets or otherwise succeeds to the business of the Company (the Company or such person, the “Successor
Entity”)) directly or indirectly, at least a majority of the combined voting power of the Successor Entity’s outstanding voting securities immediately after the transaction, and 

  
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 (B) after which no person or group beneficially owns voting securities
representing 50% or more of the combined voting power of the Successor Entity; provided, however, that no person or group shall be treated for purposes of this clause (B) as beneficially owning 50% or more of the combined voting power of the
Successor Entity solely as a result of the voting power held in the Company prior to the consummation of the transaction. 
 Notwithstanding
the foregoing, in no event shall the transaction or event described in subsection (i) or (ii) constitute a Change in Control for purposes of this Agreement unless such transaction also constitutes a “change in control event,” as
defined in Treasury Regulation Section 1.409A-3(i)(5). 
 (c) Date of Termination.
“Date of Termination” shall mean (i) if Executive’s employment is terminated by Executive’s death, the date of Executive’s death; or (ii) if Executive’s employment is terminated pursuant to
Section 3(a)(ii) – (vi) either the date indicated in the Notice of Termination or the date specified by the Company pursuant to Section 3(b), whichever is earlier. 

(d) Disability. “Disability” shall mean, at any time the Company or any of its affiliates sponsors a long-term
disability plan for the Company’s employees, “disability” as defined in such long-term disability plan for the purpose of determining a participant’s eligibility for benefits, provided, however, if the long-term disability plan
contains multiple definitions of disability, “Disability” shall refer to that definition of disability which, if Executive qualified for such disability benefits, would provide coverage for the longest period of time. The determination of
whether Executive has a Disability shall be made by the person or persons required to make disability determinations under the long-term disability plan. At any time the Company does not sponsor a long-term disability plan for its employees,
Disability shall mean Executive’s inability to perform, with or without reasonable accommodation, the essential functions of Executive’s position hereunder for a total of three months during any
six-month period as a result of incapacity due to mental or physical illness as determined by a physician selected by the Company or its insurers and acceptable to Executive or Executive’s legal
representative, with such agreement as to acceptability not to be unreasonably withheld or delayed. Any refusal by Executive to submit to a medical examination for the purpose of determining Disability shall be deemed to constitute conclusive
evidence of Executive’s Disability. 
 (e) Good Reason. For the sole purpose of determining Executive’s right to severance
payments as described above, Executive’s resignation will be for “Good Reason” if Executive resigns within ninety days after any of the following events, unless Executive consents to the applicable event: (i) a decrease in
Executive’s annual base salary, other than a reduction in annual base salary of less than 10% that is implemented in connection with a contemporaneous reduction in annual base salaries affecting other senior executives of the Company,
(ii) a material decrease in Executive’s authority or areas of responsibility as are commensurate with Executive’s title or position (other than decreases that occur when individuals are hired to replace departing executives or are
hired at a level below Executive Vice President and other than in connection with a corporate transaction where Executive continues to hold the position referenced in Section 1(c) above with respect to the Company’s business,
substantially as such 

  
 9 

 business exists prior to the date of consummation of such corporate transaction, but does not hold such position
with respect to the successor corporation), or (iii) the relocation of Executive’s primary office to a location more than 50 miles from the Boston, Massachusetts metropolitan area. Notwithstanding the foregoing, no Good Reason will have
occurred unless and until Executive has: (i) provided the Company, within 60 days of Executive’s knowledge of the occurrence of the facts and circumstances underlying the Good Reason event, written-notice stating with specificity the
applicable facts and circumstances underlying such finding of Good Reason; and (ii) provided the Company with an opportunity to cure the same within 30 days after the receipt of such notice. 

(f) Person. “Person” means any individual or any corporation, limited liability company, general partnership, limited
partnership, venture, trust, business trust, unincorporated association, estate or other entity. 
 8. Miscellaneous Provisions. 

(a) Governing Law. This Agreement shall be governed, construed, interpreted and enforced in accordance with its express terms, and
otherwise in accordance with the substantive laws of the Commonwealth of Massachusetts without reference to the principles of conflicts of law of the Commonwealth of Massachusetts or any other jurisdiction, and where applicable, the laws of the
United States. 
 (b) Validity. The invalidity or unenforceability of any provision or provisions of this Agreement shall not affect
the validity or enforceability of any other provision of this Agreement, which shall remain in full force and effect. 
 (c) Notices.
Any notice, request, claim, demand, document and other communication hereunder to any Party shall be effective upon receipt (or refusal of receipt) and shall be in writing and delivered personally or sent by facsimile or certified or registered
mail, postage prepaid, as follows: 
 (i) If to the Company, the General Counsel at its headquarters, 

(ii) If to Executive, at the last address that the Company has in its personnel records for Executive, or 

(iii) At any other address as any Party shall have specified by notice in writing to the other Party. 

(d) Counterparts. This Agreement may be executed in several counterparts, each of which shall be deemed to be an original, but all of
which together will constitute one and the same Agreement. Signatures delivered by facsimile shall be deemed effective for all purposes. 

(e) Entire Agreement. The terms of this Agreement and the Proprietary Information Agreement are intended by the Parties to be the final
expression of their agreement with respect to the subject matter hereof and thereof and supersede all prior understandings and agreements, whether written or oral, including, without limitation, that certain offer letter between Executive and the
Company, dated as of December 1,2015. The Parties further intend that this Agreement 

  
 10 

 
and the Proprietary Information Agreement shall constitute the complete and exclusive statement of their terms and that no extrinsic evidence whatsoever may be introduced in any judicial,
administrative, or other legal proceeding to vary the terms of this Agreement or the Proprietary Information Agreement. 
 (f) Amendments;
Waivers. This Agreement may not be modified, amended, or terminated except by an instrument in writing, signed by Executive and a duly authorized officer of Company. By an instrument in writing similarly executed, Executive or a duly authorized
officer of the Company may waive compliance by the other Party with any specifically identified provision of this Agreement that such other Party was or is obligated to comply with or perform; provided, however, that such waiver shall
not operate as a waiver of, or estoppel with respect to, any other or subsequent failure. No failure to exercise and no delay in exercising any right, remedy, or power hereunder preclude any other or further exercise of any other right, remedy, or
power provided herein or by law or in equity. 
 (g) No Inconsistent Actions. The Parties hereto shall not voluntarily undertake or
fail to undertake any action or course of action inconsistent with the provisions or essential intent of this Agreement. Furthermore, it is the intent of the Parties hereto to act in a fair and reasonable manner with respect to the interpretation
and application of the provisions of this Agreement. 
 (h) Construction. This Agreement shall be deemed drafted equally by both the
Parties. Its language shall be construed as a whole and according to its fair meaning. Any presumption or principle that the language is to be construed against any Party shall not apply. The headings in this Agreement are only for convenience and
are not intended to affect construction or interpretation. Any references to paragraphs, subparagraphs, sections or subsections are to those parts of this Agreement, unless the context clearly indicates to the contrary. Also, unless the context
clearly indicates to the contrary, (a) the plural includes the singular and the singular includes the plural; (b) “and” and “or” are each used both conjunctively and disjunctively; (c) “any,” “all,”
“each,” or “every” means “any and all,” and “each and every”; (d) “includes” and “including” are each “without limitation”; (e) “herein,” “hereof,”
“hereunder” and other similar compounds of the word “here” refer to the entire Agreement and not to any particular paragraph, subparagraph, section or subsection; and (f) all pronouns and any variations thereof shall be
deemed to refer to the masculine, feminine, neuter, singular or plural as the identity of the entities or persons referred to may require. 

(i) Arbitration. Any controversy, claim or dispute arising out of or relating to this Agreement, shall be settled solely and exclusively
by a binding arbitration process administered by JAMS/Endispute in Boston, Massachusetts. Such arbitration shall be conducted in accordance with the then-existing JAMS/Endispute Rules of Practice and Procedure, with the following exceptions if in
conflict: (a) one arbitrator who is a retired judge shall be chosen by JAMS/Endispute; (b) each Party to the arbitration will pay one-half of the expenses and fees of the arbitrator, together with
other expenses of the arbitration incurred or approved by the arbitrator; and (c) arbitration may proceed in the absence of any Party if written notice (pursuant to the JAMS/Endispute rules and regulations) of the proceedings has been given to
such Party. Each Party shall bear its own attorneys’ fees and expenses; provided that the arbitrator may assess the prevailing Party’s fees and costs against the non-prevailing Party as part of the
arbitrator’s award. The Parties agree to abide by all decisions and awards rendered in such 

  
 11 

 
proceedings. Such decisions and awards rendered by the arbitrator shall be final and conclusive. All such controversies, claims or disputes shall be settled in this manner in lieu of any action
at law or equity; provided, however, that nothing in this subsection shall be construed as precluding the bringing an action for injunctive relief or specific performance as provided in this Agreement or the Proprietary Information Agreement. This
dispute resolution process and any arbitration hereunder shall be confidential and neither any Party nor the neutral arbitrator shall disclose the existence, contents or results of such process without the prior written consent of all Parties,
except where necessary or compelled in a Court to enforce this arbitration provision or an award from such arbitration or otherwise in a legal proceeding. If JAMS/Endispute no longer exists or is otherwise unavailable, the Parties agree that the
American Arbitration Association (“AAA”) shall administer the arbitration in accordance with its then-existing rules as modified by this subsection. In such event, all references herein to JAMS/Endispute shall mean AAA. 

(j) Enforcement. If any provision of this Agreement is held to be illegal, invalid or unenforceable under present or future laws
effective during the term of this Agreement, such provision shall be fully severable; this Agreement shall be construed and enforced as if such illegal, invalid or unenforceable provision had never comprised a portion of this Agreement; and the
remaining provisions of this Agreement shall remain in full force and effect and shall not be affected by the illegal, invalid or unenforceable provision or by its severance from this Agreement. Furthermore, in lieu of such illegal, invalid or
unenforceable provision there shall be added automatically as part of this Agreement a provision as similar in terms to such illegal, invalid or unenforceable provision as may be possible and be legal, valid and enforceable. 

(k) Withholding. The Company shall be entitled to withhold from any amounts payable under this Agreement any federal, state, local or
foreign withholding or other taxes or charges which the Company is required to withhold. The Company shall be entitled to rely on an opinion of counsel if any questions as to the amount or requirement of withholding shall arise. 

(l) Survival. Notwithstanding anything to the contrary in this Agreement, the provisions of Sections 5 through 8 will
survive the termination of Executive’s employment and the expiration or termination of the Term. 
 (m) Section 409A.

 (i) General. The intent of the Parties is that the payments and benefits under this Agreement comply with or be exempt from
Section 409A of the Internal Revenue Code of 1986, as amended, and the regulations and guidance promulgated thereunder (collectively, “Section 409A”) and, accordingly, to the maximum extent permitted, this Agreement shall be
interpreted to be in compliance therewith. 
 (ii) Separation from Service. Notwithstanding anything in this Agreement to the
contrary, any compensation or benefits payable under this Agreement that are designated under this Agreement as payable upon Executive’s termination of employment shall be payable only upon Executive’s “separation from service”
with the Company within the meaning of Section 409A (a “Separation from Service”) and, except as provided below, any such compensation or benefits described in Sections 4(b) and 4(c) shall not be paid, or, in the
case of installments, shall not commence payment, until the 30th day following Executive’s Separation 

  
 12 

 
from Service (the “First Payment Date”). Any installment payments that would have been made to Executive during the 30-day period
immediately following Executive’s Separation from Service but for the preceding sentence shall be paid to Executive on the First Payment Date and the remaining payments shall be made as provided in this Agreement. 

(iii) Specified Employee. Notwithstanding anything in this Agreement to the contrary, if Executive is deemed by the Company at the time
of Executive’s Separation from Service to be a “specified employee” for purposes of Section 409A, to the extent delayed commencement of any portion of the benefits to which Executive is entitled under this Agreement is required
in order to avoid a prohibited distribution under Section 409A, such portion of Executive’s benefits shall not be provided to Executive prior to the earlier of (i) the expiration of the 6-month
period measured from the date of Executive’s Separation from Service with the Company or (ii) the date of Executive’s death. Upon the first business day following the expiration of the applicable Section 409A period, all payments
deferred pursuant to the preceding sentence shall be paid in a lump sum to Executive (or Executive’s estate or beneficiaries), and any remaining payments due to Executive under this Agreement shall be paid as otherwise provided herein. 

(iv) Expense Reimbursements. To the extent that any reimbursements under this Agreement are subject to Section 409A, any such
reimbursements payable to Executive shall be paid to Executive no later than December 31 of the year following the year in which the expense was incurred, provided that Executive submits Executive’s reimbursement request promptly following the
date the expense is incurred. The amount of expenses reimbursed in one year shall not affect the amount eligible for reimbursement in any subsequent year, other than medical expenses referred to in Section 105(b) of the Code, and
Executive’s right to reimbursement under this Agreement will not be subject to liquidation or exchange for another benefit. 
 (v)
Installments. Executive’s right to receive any installment payments under this Agreement, including without limitation any continuation of salary payments that are payable on Company payroll dates, shall be treated as a right to receive
a series of separate payments and, accordingly, each such installment payment shall at all times be considered a separate and distinct payment as permitted under Section 409A. Except as otherwise permitted under Section 409A, no payment
hereunder shall be accelerated or deferred unless such acceleration or deferral would not result in additional tax or interest pursuant to Section 409A. 

9. Executive Acknowledgement. 

Executive acknowledges that Executive has read and understands this Agreement, is fully aware of its legal effect, has not acted in reliance
upon any representations or promises made by the Company other than those contained in writing herein, and has entered into this Agreement freely based on Executive’s own judgment. 

[Signature Page Follows] 

  
 13 

 IN WITNESS WHEREOF, the Parties have executed this Agreement on the date and year first above
written. 
  

			
	COMPANY
		
	By:	 	 /s/ Ton Logtenberg

		 	Ton Logtenberg
		 	Chief Executive Officer
		
	By:	 	 /s/ Shelley Margetson

		 	Shelley Margetson
		 	Chief Financial Officer
	
	EXECUTIVE
		
	By:	 	 /s/ Hui Liu

		 	Hui Liu

 EXHIBIT A 

Separation Agreement and Release 

This Separation Agreement and Release (“Agreement”) is made by and between Hui Liu (“Executive”)
and                     (the “Company”) (collectively referred to as the “Parties” or individually referred to as a
“Party”). Capitalized terms used but not defined in this Agreement shall have the meanings set forth in the Employment Agreement (as defined below). 

WHEREAS, the Parties have previously entered into that certain Employment Agreement, dated as
of                         (the “Employment Agreement”); and 

WHEREAS, in connection with Executive’s termination of employment with the Company or a subsidiary or affiliate of the Company
effective            , 20    , the Parties wish to resolve any and all disputes, claims, complaints, grievances, charges, actions, petitions, and demands that Executive
may have against the Company and any of the Releasees as defined below, including, but not limited to, any and all claims arising out of or in any way related to Executive’s employment with or separation from the Company or its subsidiaries or
affiliates but, for the avoidance of doubt, nothing herein will be deemed to release any rights or remedies in connection with Executive’s ownership of vested equity securities of the Company or Executive’s right to indemnification by the
Company or any of its affiliates pursuant to contract or applicable law (collectively, the “Retained Claims”). 
 NOW,
THEREFORE, in consideration of the severance payments and benefits described in Section 4 of the Employment Agreement, which, pursuant to the Employment Agreement, are conditioned on Executive’s execution and non-revocation of this Agreement,
and in consideration of the mutual promises made herein, the Company and Executive hereby agree as follows: 
 1. Severance Payments;
Salary and Benefits. The Company agrees to provide Executive with the severance payments and benefits described in Section 4(b) or Section 4(c) of the Employment Agreement, payable at the times set forth in, and subject to the terms and
conditions of, the Employment Agreement. In addition, to the extent not already paid, and subject to the terms and conditions of the Employment Agreement, the Company shall pay or provide to Executive all other payments or benefits described in
Section 3(c) of the Employment Agreement, subject to and in accordance with the terms thereof. 
 2. Release of Claims. Executive
agrees that, other than with respect to the Retained Claims, the foregoing consideration represents settlement in full of all outstanding obligations owed to Executive by the Company, any of its direct or indirect subsidiaries and affiliates, and
any of their current and former officers, directors, equity holders, managers, employees, agents, investors, attorneys, shareholders, administrators, affiliates, benefit plans, plan administrators, insurers, trustees, divisions, and subsidiaries and
predecessor and successor corporations and assigns (collectively, the “Releasees”). Executive, on Executive’s own behalf and on behalf of any of Executive’s affiliated companies or entities and any of their respective
heirs, family members, executors, agents, and assigns, other than with respect to the Retained Claims, hereby and forever releases the Releasees from, and agrees not to sue concerning, or in any manner to institute, prosecute, or pursue, any claim,
complaint, charge, duty, obligation, or cause of action relating to any matters of any kind, whether presently known or unknown, suspected or 

 
unsuspected, that Executive may possess against any of the Releasees arising from any omissions, acts, facts, or damages that have occurred up until and including the Effective Date of this
Agreement (as defined in Section 7 below), including, without limitation: 
 (a) any and all claims relating to or arising from
Executive’s employment or service relationship with the Company or any of its direct or indirect subsidiaries or affiliates and the termination of that relationship; 

(b) any and all claims relating to, or arising from, Executive’s right to purchase, or actual purchase of any shares of stock or other
equity interests of the Company or any of its affiliates, including, without limitation, any claims for fraud, misrepresentation, breach of fiduciary duty, breach of duty under applicable state corporate law, and securities fraud under any state or
federal law; 
 (c) any and all claims for wrongful discharge of employment; termination in violation of public policy; discrimination;
harassment; retaliation; breach of contract, both express and implied; breach of covenant of good faith and fair dealing, both express and implied; promissory estoppel; negligent or intentional infliction of emotional distress; fraud; negligent or
intentional misrepresentation; negligent or intentional interference with contract or prospective economic advantage; unfair business practices; defamation; libel; slander; negligence; personal injury; assault; battery; invasion of privacy; false
imprisonment; conversion; and disability benefits; 
 (d) any and all claims for violation of any federal, state, or municipal statute,
including, but not limited to, Title VII of the Civil Rights Act of 1964;the Civil Rights Act of 1991; the Rehabilitation Act of 1973;the Americans with Disabilities Act of 1990; the Equal Pay Act; the Fair Credit Reporting Act; the Age
Discrimination in Employment Act of 1967; the Older Workers Benefit Protection Act; the Employee Retirement Income Security Act of 1974; the Worker Adjustment and Retraining Notification Act; the Family and Medical Leave Act; and the Sarbanes-Oxley
Act of 2002; 
 (e) any and all claims for violation of the federal or any state constitution; 

(f) any and all claims arising out of any other laws and regulations relating to employment or employment discrimination; 

(g) any claim for any loss, cost, damage, or expense arising out of any dispute over the
non-withholding or other tax treatment of any of the proceeds received by Executive as a result of this Agreement; and 

(h) any and all claims for attorneys’ fees and costs. 

Executive agrees that the release set forth in this section shall be and remain in effect in all respects as a complete general release as to the matters
released. This release does not release claims that cannot be released as a matter of law, including, but not limited to, Executive’s right to report possible violations of federal law or regulation to any governmental agency or entity in
accordance with the provisions of and rules promulgated under Section 2lF of the Securities Exchange Act of 1934 or Section 806 of the Sarbanes-Oxley Act of 2002, or any other 

  
 A-2 

 whistleblower protection provisions of state or federal law or regulation, Executive’s right to file a
charge with or participate in a charge by the Equal Employment Opportunity Commission, or any other local, state, or federal administrative body or government agency that is authorized to enforce or administer laws related to employment, against the
Company (with the understanding that Executive’s release of claims herein bars Executive from recovering such monetary relief from the Company or any Releasee), claims for unemployment compensation or any state disability insurance benefits
pursuant to the terms of applicable state law, claims to continued participation in certain of the Company’s group benefit plans pursuant to the terms and conditions of COBRA, claims to any benefit entitlements vested as the date of separation
of Executive’s employment, pursuant to written terms of any employee benefit plan of the Company or its affiliates and Executive’s right under applicable law and any Retained Claims. This release further does not release claims for breach
of Section 3(c), Section 4(b) or Section 4(c) of the Employment Agreement. 
 3. Acknowledgment of Waiver of Claims under ADEA.
Executive understands and acknowledges that Executive is waiving and releasing any rights Executive may have under the Age Discrimination in Employment Act of 1967 (“ADEA’’), and that this waiver and release is knowing and
voluntary. Executive understands and agrees that this waiver and release does not apply to any rights or claims that may arise under the ADEA after the Effective Date of this Agreement. Executive understands and acknowledges that the consideration
given for this waiver and release is in addition to anything of value to which Executive was already entitled. Executive further understands and acknowledges that Executive has been advised by this writing that: (a) Executive should consult with an
attorney prior to executing this Agreement; (b) Executive has 21 days within which to consider this Agreement; (c) Executive has 7 days following Executive’s execution of this Agreement to revoke this Agreement pursuant to written notice to the
General Counsel of the Company; (d) this Agreement shall not be effective until after the revocation period has expired; and (e) nothing in this Agreement prevents or precludes Executive from challenging or seeking a determination in good faith of
the validity of this waiver under the ADEA, nor does it impose any condition precedent, penalties, or costs for doing so, unless specifically authorized by federal law. In the event Executive signs this Agreement and returns it to the Company in
less than the 21 day period identified above, Executive hereby acknowledges that Executive has freely and voluntarily chosen to waive the time period allotted for considering this Agreement. 

4. Severability. In the event that any provision or any portion of any provision hereof or any surviving agreement made a part hereof
becomes or is declared by a court of competent jurisdiction or arbitrator to be illegal, unenforceable, or void, this Agreement shall continue in full force and effect without said provision or portion of provision. 

5. No Oral Modification. This Agreement may only be amended in a writing signed by Executive and a duly authorized officer of the
Company. 
 6. Governing Law; Dispute Resolution. This Agreement shall be subject to the provisions of Sections 9(a), 9(c) and 9(i) of
the Employment Agreement. 
 7. Effective Date. If Executive has attained or is over the age of 40 as of the date of Executive’s
termination of employment, then each Party has seven days after that Party signs this Agreement to revoke it and this Agreement will become effective on the eighth day after 

  
 A-3 

 Executive signed this Agreement, so long as it has been signed by the Parties and has not been revoked by either
Party before that date (the “Effective Date”). If Executive has not attained the age of 40 as of the date of Executive’s termination of employment, then the “Effective Date” shall be the date on which Executive signs
this Agreement. 
 8. Voluntary Execution of Agreement. Executive understands and agrees that Executive executed this Agreement
voluntarily, without any duress or undue influence on the part or behalf of the Company or any third party, with the full intent of releasing all of Executive’s claims against the Company and any of the other Releasees. Executive acknowledges
that: (a) Executive has read this Agreement; (b) Executive has not relied upon any representations or statements made by the Company that are not specifically set forth in this Agreement; (c) Executive has been represented in the preparation,
negotiation, and execution of this Agreement by legal counsel of Executive’s own choice or has elected not to retain legal counsel; (d) Executive understands the terms and consequences of this Agreement and of the releases it contains; and (e)
Executive is fully aware of the legal and binding effect of this Agreement. 
 IN WITNESS WHEREOF, the Parties have executed this Agreement
on the respective dates set forth below. 
  

									
	Dated:	 	                            	 		 	  

		 		 		 	Hui Liu
				
		 		 		 	COMPANY
					
	Dated:	 	                            	 		 	By:	 	  

		 		 		 		 	Name:
		 		 		 		 	Title:

  
 A-4 

 AMENDED AND RESTATED 

EMPLOYMENT AGREEMENT 

This Amended and Restated Employment Agreement (this “Agreement”), dated as of March 2, 2016 (the “Effective
Date”), is made by and between Merus US, Inc., a Delaware corporation (together with any successors or assigns, the “Company”), and Hui Liu (the “Executive”) (collectively referred to herein as the
“Parties”). 
 RECITALS 
  

	(A)	Merus B.V., a Dutch private limited company (together with any successors or assigns, the “Parent”) and Executive entered into an Employment Agreement dated December 16, 2015 (the “Original
Employment Agreement”) pursuant to which he became an employee of Parent on December 16, 2015 (the “Original Effective Date”). 

  

	(B)	It is the desire of the Company to continue to assure itself of the services of Executive beginning on and following the Effective Date, by entering into this Agreement, which will supersede the Original Employment
Agreement. 

  

	(C)	Executive and the Company mutually desire that Executive provide services to the Company on the terms herein provided. 

AGREEMENT 
 NOW,
THEREFORE, in consideration of the foregoing and of the respective covenants and agreements set forth below, the Parties hereto agree as follows: 
 1.
Employment. 
 (a) General. Effective as of the Effective Date, the Company shall employ Executive and Executive shall
remain in the employ of the Company, for the period and in the position set forth in this Section 1, and subject to the other terms and conditions herein provided. 

(b) At-Will Employment. The Company and Executive acknowledge that Executive’s employment
is at-will, as defined under applicable law, and that Executive’s employment with the Company may be terminated by either Party at any time for any or no reason (subject to the notice requirements of
Section 3(b)). This “at-will” nature of Executive’s employment shall remain unchanged during Executive’s tenure as an employee and may not be changed, except in an express
writing signed by Executive and a duly authorized officer of the Company or the Parent, as applicable. If Executive’s employment terminates for any reason, Executive shall not be entitled to any payments, benefits, damages, award or
compensation other than as provided in this Agreement or otherwise agreed to in writing by a duly authorized officer of the Company, a duly authorized officer of the Parent or as provided by applicable law. The period of Executive’s employment
by the Company shall be referred to herein as the “Term”. 

 (c) Position; Duties and Location. Executive shall serve as Executive Vice President,
Chief Business Officer of the Company and the Parent, with such responsibilities, duties and authority normally associated with such positions and as may from time to time be assigned to Executive by the Chief Executive Ofhcer of the Parent or the
Management Board or the Supervisory Board of the Parent (either one, the “Board”). Executive’s normal place of work shall be at the Company’s office in the Boston, Massachusetts metropolitan area. Executive shall devote
substantially all of Executive’s working time and efforts to the business and affairs of the Company (which shall include service to its affiliates, if applicable) and shall not engage in outside business activities (including serving on
outside boards or committees) without the consent of the Board, provided that Executive shall be permitted to (i) manage Executive’s personal, financial and legal affairs, (ii) participate in trade associations, and (iii) serve
on the board of directors of not-for-profit or tax-exempt charitable organizations, in each case, subject to compliance with this
Agreement and provided that such activities do not materially interfere with Executive’s performance of Executive’s duties and responsibilities hereunder. Executive agrees to observe and comply with the rules and policies of the Company
and its Parent as adopted by the Company or its Parent, as applicable from time to time, in each case as amended from time to time, as set forth in writing, and as delivered or made available to Executive (each, a “Policy”). 

2. Comnensation and Related Matters. 

(a) Annual Base Salary. During the Term, Executive shall receive a base salary at a rate of $335,000 per annum, which shall be paid in
accordance with the customary payroll practices of the Company and shall be pro-rated for partial years of employment. Such Annual Base Salary shall be reviewed (and may be adjusted) from time to time by the
Board (such annual base salary, as it may be adjusted from time to time, the “Annual Base Salary”). 
 (b) Bonus.
During the Term, Executive will be eligible to participate in an annual incentive program established by the Board. Executive’s annual incentive compensation under such incentive program (the “Annual Bonus”) shall be targeted
at 35% of his Annual Base Salary. The Annual Bonus payable under the incentive program shall be based on the achievement of performance goals to be determined by the Board and may be pro-rated for calendar
year 2016 performance based on the Original Effective Date. The payment of any Annual Bonus pursuant to the incentive program shall be subject to Executive’s continued employment with the Company through the date of payment. 

(c) Equity Awards. Parent granted Executive an option on December 16, 2015 pursuant to the Parent’s 2010 Employee Option Plan with
a per share exercise price of €4.00 (the “Option”). Executive shall be eligible to receive additional equity awards at the discretion of the Board. 

(d) Benefits. During the Term, Executive shall be eligible to participate in employee benefit plans, programs and arrangements of the
Company (including medical, dental, vision, life insurance, disability insurance and defined contribution 401(k) plan) made available to other similarly-situated employees of the Company, consistent with the terms thereof and as such plans, programs
and arrangements may be amended from time to time. Notwithstanding the foregoing, if the Company does not maintain any “group health plan” (within the meaning of Section 4980B of the Internal Revenue Code and the regulations
thereunder (“COBRA”)) for its U.S. employees as of the Effective Date, then, subject to Executive’s valid election to receive 

  
 2 

 COBRA benefits under the health plans of Executive’s prior employer, during the period beginning on the
Effective Date and ending on the first to occur of: (i) the date on which the Company adopts or otherwise makes generally available to its U.S. employees a group health plan or (ii) the date on which Executive terminates employment with the
Company, the Company shall reimburse Executive for the actual cost of healthcare premiums incurred by Executive under the group health plan of Executive’s prior employer pursuant to COBRA, subject to proper substantiation of such costs in
accordance with applicable Company Policy no later than sixty (60) days after such costs are incurred; provided, that, in the event the period of time during which Executive is entitled to continuation coverage under the group health plan of
Executive’s prior employer pursuant to COBRA expires prior to the Company adopting or otherwise making available a group health plan to its U.S. employees, the Company shall continue to pay Executive for healthcare costs in an amount equal to
the cost of healthcare premiums incurred by Executive under the group health plan of Executive’s prior employer pursuant to COBRA based on the last month of the COBRA period. Such costs shall be reimbursed promptly, but in no event later than
sixty (60) days following proper substantiation thereof. 
 (e) Vacation. During the Term, Executive shall be entitled to no less
than four (4) weeks of paid personal leave per calendar year in accordance with the Company’s paid time off Policies. Any vacation shall be taken at the reasonable and mutual convenience of the Company and Executive. 

(f) Business Expenses. During the Term, the Company shall reimburse Executive for all reasonable travel and other business expenses
incurred by Executive in the performance of Executive’s duties to the Company in accordance with the Company’s expense reimbursement Policy. 

(g) Relocation. 
 (i)
Temporary Living Expenses. Beginning on the Original Effective Date and ending on the date in which Executive secures permanent housing in the Boston, Massachusetts metropolitan area, but in no event for a period greater than six
(6) months following the Original Effective Date, the Company shall pay Executive $5,000 per month to help offset Executive’s temporary living expenses in the Boston, Massachusetts metropolitan area. 

(ii) Relocation Expenses. The Company shall reimburse Executive up to a maximum amount of $50,000 for reasonable, documented moving
expenses incurred prior to December 15, 2017 as a result of Executive’s relocation to the Boston, Massachusetts area, which relocation expense reimbursement will be paid (subject to all tax withholdings which the Company reasonably
determines are required) in calendar year 2017, regardless of when such expenses are actually incurred, and following Executive’s timely submission of documentation reasonably requested by the Company. 

(iii) Repayment. In the event Executive’s employment with the Company is terminated by the Company for Cause (as defined below) or
by the Executive for any reason, in either case, prior to the first anniversary of the date the applicable relocation expense was incurred, Executive shall immediately repay to the Company a prorated portion of such 

  
 3 

 relocation expense reimbursement in an amount determined by multiplying (x) the amount of any relocation
expense reimbursement paid to Executive pursuant to Section 2(g)(ii) within the one (1) year period prior to such termination by (x) a fraction, the numerator of which is the number of calendar days remaining from the date of
Executive’s termination to the first anniversary of the date the applicable relocation expense was incurred and the denominator of which is 365. 

(h) Key Person Insurance. At any time during the Term, the Company shall have the right to insure the life of Executive for the
Company’s sole benefit. The Company shall have the right to determine the amount of insurance and the type of policy. Executive shall reasonably cooperate with the Company in obtaining such insurance by submitting to physical examinations, by
supplying all information reasonably required by any insurance carrier, and by executing all necessary documents reasonably required by any insurance carrier, provided that any information provided to an insurance company or broker shall not be
provided to the Company without the prior written authorization of Executive. Executive shall incur no financial obligation by executing any required document, and shall have no interest in any such policy. 

3. Termination. 
 (a)
Circumstances. Executive’s employment hereunder may be terminated by the Company or Executive, as applicable, without any breach of this Agreement, at any time, under the following circumstances: 

(i) Death. Executive’s employment hereunder shall terminate upon Executive’s death. 

(ii) Disability. If Executive has incurred a Disability, as defined below, the Company may terminate Executive’s
employment. 
 (iii) Termination for Cause. The Company may terminate Executive’s employment for Cause, as
defined below. 
 (iv) Termination without Cause. The Company may terminate Executive’s employment without Cause.

 (v) Resignation from the Company for Good Reason. Executive may resign Executive’s employment with the Company
for Good Reason, as defined below. 
 (vi) Resignation from the Company Without Good Reason. Executive may resign
Executive’s employment with the Company for any reason other than Good Reason or for no reason. 
 (b) Notice of Termination. Any
termination of Executive’s employment by the Company or by Executive under this Section 3 (other than termination pursuant to Section 3(a)(i)) shall be communicated by a written notice to the other party hereto
(i) indicating the specific termination provision in this Agreement relied upon, (ii) setting forth in reasonable detail the facts and circumstances claimed to provide a basis for termination of Executive’s employment under the
provision so indicated, if applicable, and (iii) specifying a Date of 

  
 4 

 
Termination which, if submitted by Executive, shall be at least thirty (30) days following the date of such notice (a “Notice of Termination”); provided,
however, that in the event that Executive delivers a Notice of Termination to the Company, the Company may, in its sole discretion, change the Date of Termination to any date that occurs following the date of Company’s receipt of such
Notice of Termination and is prior to the date specified in such Notice of Termination. A Notice of Termination submitted by the Company may provide for a Date of Termination on the date Executive receives the Notice of Termination, or any date
thereafter elected by the Company in its sole discretion. The failure by the Company or Executive to set forth in the Notice of Termination any fact or circumstance which contributes to a showing of Cause or Good Reason shall not waive any right of
such Party hereunder or preclude such Party from asserting such fact or circumstance in enforcing such Party’s rights hereunder. 
 (c)
Company Obligations upon Termination. Upon termination of Executive’s employment pursuant to this Section 3, Executive (or Executive’s estate) shall be entitled to receive the sum of: (i) the portion of
Executive’s Annual Base Salary earned through the Date of Termination, but not yet paid to Executive; (ii) any expenses owed to Executive pursuant to Section 2(f); and (iii) any amount accrued and arising from
Executive’s participation in, or benefits accrued under any employee benefit plans, programs or arrangements, which amounts shall be payable in accordance with the terms and conditions of such employee benefit plans, programs or arrangements
(collectively, the “Company Arrangements”). Except as otherwise expressly required by law (e.g., COBRA) or as specifically provided herein, all of Executive’s rights to salary, severance, benefits, bonuses and other
compensatory amounts hereunder (if any) shall cease upon the termination of Executive’s employment hereunder. In the event that Executive’s employment is terminated by the Company for any reason, Executive’s sole and exclusive remedy
shall be to receive the payments and benefits described in this Section 3(c) or Section 4, as applicable 
 (d)
Deemed Resignation. Upon termination of Executive’s employment for any reason, Executive shall be deemed to have resigned from all offices and directorships, if any, then held with the Company or any of its affiliates. 

4. Severance Payments. 
 (a)
Termination for Cause, or Termination Upon Death, Disability or Resignation from the Company Without Good Reason. If Executive’s employment shall terminate as a result of Executive’s death pursuant to Section 3(a)(i) or
Disability pursuant to Section 3(a)(ii), pursuant to Section 3(a)(iii) for Cause, or pursuant to Section 3(a)(vi) for Executive’s resignation from the Company without Good Reason, then Executive shall not be
entitled to any severance payments or benefits, except as provided in Section 3(c). 
 (b) Termination without Cause or
Resignation from the Company for Good Reason. If Executive’s employment is terminated by the Company without Cause pursuant to Section 3(a)(iv) or pursuant to Section 3(a)(v) due to Executive’s resignation for Good Reason, in
either case, which termination does not occur within one year following the date of a Change in Control, then, subject to Executive signing on or before the 21st day following Executive’s Separation from Service (as defined below), and not
revoking, a release of claims in substantially 

  
 5 

 
the form attached hereto as Exhibit A (the “Release”), and Executive’s continued compliance with the terms of the Proprietary Information Agreement (as defined below), Executive
shall receive, in addition to payments and benefits set forth in Section 3(c), (i) an amount in cash equal to 0.5 times the Annual Base Salary, payable in the form of salary continuation in regular instalments over the six-month period following Executive’s Separation from Service in accordance with the Company’s customary payroll practices and (ii) in the discretion of the Board, accelerated vesting (in whole or in
part) of any portion of the Option that is unvested as of the Date of Termination. 
 (c) Change in Control. Notwithstanding anything
to the contrary in Section 4(b), in the event Executive’s employment is terminated by the Company without Cause pursuant to Section 3(a)(iv) or pursuant to Section 3(a)(v) due to Executive’s resignation
for Good Reason, in either case, within one year following the date of a Change in Control, then, subject to Executive signing on or before the 21st day following Executive’s Separation from Service, and not revoking, the Release, and
Executive’s continued compliance with the terms of the Proprietary Information Agreement, Executive shall receive, in addition to payments and benefits set forth in Section 3(c), the following: 

(i) an amount in cash equal to 0.5 times the sum of (A) the Annual Base Salary and (B) the Annual Bonus at the target amount, which
amount shall be paid in a lump sum on the First Payment Date (as defined below); 
 (ii) if Executive elects to receive continued medical,
dental or vision coverage under one or more of the Company’s group healthcare plans pursuant to COBRA, the Company shall directly pay, or reimburse Executive for, the COBRA premiums for Executive and Executive’s covered dependents under
such plans during the period commencing on Executive’s Separation from Service and ending upon the earliest of (X) the date that is nine (9) months following Executive’s Separation from Service, (Y) the date that Executive
and/or Executive’s covered dependents become no longer eligible for COBRA or (Z) the date Executive becomes eligible to receive healthcare coverage from a subsequent employer. Notwithstanding the foregoing, if the Company determines in its
sole discretion that it cannot provide the foregoing benefit without potentially violating applicable law or incurring an excise tax (including, without limitation, by reason of Section 2716 of the Public Health Service Act), the Company shall
in lieu thereof provide to Executive a taxable monthly payment in an amount equal to the monthly COBRA premium that Executive would be required to pay to continue Executive’s and Executive’s covered dependents’ group health coverage
in effect on the Date of Termination (which amount shall be based on the premium for the first month of COBRA coverage), less the amount the Executive would have had to pay to receive group health coverage for Executive and Executive’s covered
dependents based on the cost sharing levels in effect on the Date of Termination, which payments shall be made regardless of whether Executive elects COBRA continuation coverage and shall commence in the month following the month in which the Date
of Termination occurs and shall end on the earlier of (X) the last day of the nine (9) month period following Executive’s Separation from Service, (Y) the date that Executive and/or Executive’s covered dependents become no
longer eligible for COBRA or (Z) the date Executive becomes eligible to receive healthcare coverage from a subsequent employer; and 

  
 6 

 (iii) accelerated vesting of any portion of the Option that is unvested as of the Date of
Termination. 
 5. Employee Proprietary Information and Inventions Assignment Agreement. 

Executive acknowledges and agrees that Executive continue to be bound by the terms of the Parent’s Employee Proprietary Information and
Inventions Assignment Agreement (the “Proprietary Information Agreement”), which Proprietary Information Agreement contains certain non-competition,
non-solicitation, non-disclosure and assignment of inventions provisions in favor of the Parent. 

6. Assignment and Successors. 
 The
Company may assign its rights and obligations under this Agreement to any of its affiliates, including, without limitation, any successor to all or substantially all of the business or the assets of the Company (by merger or otherwise), and may
assign or encumber this Agreement and its rights hereunder as security for indebtedness of the Company and its affiliates. This Agreement shall be binding upon and inure to the benefit of the Company, Executive and their respective successors,
assigns, personnel and legal representatives, executors, administrators, heirs, distributees, devisees, and legatees, as applicable. None of Executive’s rights or obligations may be assigned or transferred by Executive, other than
Executive’s rights to payments hereunder, which may be transferred only by will or operation of law. Notwithstanding the foregoing, Executive shall be entitled, to the extent permitted under applicable law and applicable Company Arrangements,
to select and change a beneficiary or beneficiaries to receive compensation hereunder following Executive’s death by giving written notice thereof to the Company. 

7. Certain Definitions. 
 (a)
Cause. The Company shall have “Cause” to terminate Executive’s employment hereunder upon: 
 (i)
Executive’s failure to (A) substantially perform his duties with the Company (other than any such failure resulting from Executive’s Disability) or (B) comply with, in any material respect, any of the Company’s Policies;

 (ii) the Board’s determination that Executive failed in any material respect to carry out or comply with any lawful and reasonable
directive of the Board; 
 (iii) Executive’s breach of a material provision of this Agreement or the Proprietary Information Agreement;

 (iv) Executive’s conviction, plea of no contest, plea of nolo contendere, or imposition of unadjudicated probation for any felony or
crime involving moral turpitude; 
 (v) Executive’s unlawful use (including being under the influence) or possession of illegal
drugs on the Company’s (or any of its affiliate’s) premises or while performing Executive’s duties and responsibilities under this Agreement; or 

  
 7 

 (vi) Executive’s commission of an act of fraud, embezzlement, misappropriation, willful
misconduct, or breach of fiduciary duty against the Company or any of its affiliates. 
 (b) Change in Control. “Change in
Control” shall mean and include each of the following: 
 (i) A transaction or series of related transactions (other than an
offering of Common Shares to the general public through a registration statement filed with the Securities and Exchange Commission or a transaction or series of related transactions that meets the requirements of clauses (A) and (B) of
subsection (ii) below) whereby any “person” or related “group” of “persons” (as such terms are used in Sections 13(d) and 14(d)(2) of the Securities Exchange Act of 1934 (the “Exchange Act”))
(other than the Parent, any of its subsidiaries, an employee benefit plan maintained by the Parent or any of its subsidiaries or a “person” that, prior to such transaction, directly or indirectly controls, is controlled by, or is under
common control with, the Parent) directly or indirectly acquires beneficial ownership (within the meaning of Rule l3d-3 under the Exchange Act) of securities of the Parent possessing more than 50% of the total
combined voting power of the Parent’s securities outstanding immediately after such acquisition; or 
 (ii) The consummation by the
Parent (whether directly involving the Parent or indirectly involving the Parent through one or more intermediaries) of (x) a merger, consolidation, reorganization, or business combination or (y) a sale or other disposition of all or
substantially all of the Parent’s assets in any single transaction or series of related transactions or (z) the acquisition of assets or stock of another entity, in each case other than a transaction: 

(A) which results in the Parent’s voting securities outstanding immediately before the transaction continuing to
represent (either by remaining outstanding or by being converted into voting securities of the Parent or the person that, as a result of the transaction, controls, directly or indirectly, the Parent or owns, directly or indirectly, all or
substantially all of the Parents assets or otherwise succeeds to the business of the Parent (the Parent or such person, the “Successor Entity”)) directly or indirectly, at least a majority of the combined voting power of the
Successor Entity’s outstanding voting securities immediately after the transaction, and 
 (B) after which no person or
group beneficially owns voting securities representing 50% or more of the combined voting power of the Successor Entity; provided, however, that no person or group shall be treated for purposes of this clause (B) as beneficially owning 50% or
more of the combined voting power of the Successor Entity solely as a result of the voting power held in the Parent prior to the consummation of the transaction. 

Notwithstanding the foregoing, in no event shall the transaction or event described in subsection (i) or (ii) constitute a Change in
Control for purposes of this Agreement unless such transaction also constitutes a “change in control event,” as defined in Treasury Regulation Section 1.409A-3(i)(5). 

  
 8 

 (c) Date of Termination. “Date of Termination” shall mean (i) if
Executive’s employment is terminated by Executive’s death, the date of Executive’s death; or (ii) if Executive’s employment is terminated pursuant to Section 3(a)(ii) - (vi) either the date indicated in
the Notice of Termination or the date specified by the Company pursuant to Section 3(b), whichever is earlier. 
 (d)
Disability. “Disability” shall mean, at any time the Company or any of its affiliates sponsors a long-term disability plan for the Company’s employees, “disability” as defined in such long-term disability plan
for the purpose of determining a participant’s eligibility for benefits, provided, however, if the long-term disability plan contains multiple definitions of disability, “Disability” shall refer to that definition of disability which,
if Executive qualified for such disability benefits, would provide coverage for the longest period of time. The determination of whether Executive has a Disability shall be made by the person or persons required to make disability determinations
under the long-term disability plan. At any time the Company does not sponsor a long-term disability plan for its employees, Disability shall mean Executive’s inability to perform, with or without reasonable accommodation, the essential
functions of Executive’s position hereunder for a total of three months during any six-month period as a result of incapacity due to mental or physical illness as determined by a physician selected by the
Company or its insurers and acceptable to Executive or Executive’s legal representative, with such agreement as to acceptability not to be unreasonably withheld or delayed. Any refusal by Executive to submit to a medical examination for the
purpose of determining Disability shall be deemed to constitute conclusive evidence of Executive’s Disability. 
 (e) Good
Reason. For the sole purpose of determining Executive’s right to severance payments as described above, Executive’s resignation will be for “Good Reason” if Executive resigns within ninety days after any of the
following events, unless Executive consents to the applicable event: (i) a decrease in Executive’s annual base salary, other than a reduction in annual base salary of less than 10% that is implemented in connection with a contemporaneous
reduction in annual base salaries affecting other senior executives of the Company and the Parent, (ii) a material decrease in Executive’s authority or areas of responsibility as are commensurate with Executive’s title or position
(other than decreases that occur when individuals are hired to replace departing executives or are hired at a level below Executive Vice President and other than in connection with a corporate transaction where Executive continues to hold the
position referenced in Section l(c) above with respect to the Parent’s business, substantially as such business exists prior to the date of consummation of such corporate transaction, but does not hold such position with respect to the
successor corporation), or (iii) the relocation of Executive’s primary office to a location more than 50 miles from the Boston. Massachusetts metropolitan area. Notwithstanding the foregoing, no Good Reason will have occurred unless and
until Executive has: (i) provided the Parent, within 60 days of Executive’s knowledge of the occurrence of the facts and circumstances underlying the Good Reason event, written-notice stating with specificity the applicable facts and
circumstances underlying such finding of Good Reason; and (ii) provided the Parent with an opportunity to cure the same within 30 days after the receipt of such notice. 

(f) Person. “Person” means any individual or any corporation, limited liability company, general partnership, limited
partnership, venture, trust, business trust, unincorporated association, estate or other entity. 

  
 9 

 8. Miscellaneous Provisions. 

(a) Governing Law. This Agreement shall be governed, construed, interpreted and enforced in accordance with its express terms, and
otherwise in accordance with the substantive laws of the Commonwealth of Massachusetts without reference to the principles of conflicts of law of the Commonwealth of Massachusetts or any other jurisdiction, and where applicable, the laws of the
United States. 
 (b) Validity. The invalidity or unenforceability of any provision or provisions of this Agreement shall not affect
the validity or enforceability of any other provision of this Agreement, which shall remain in full force and effect. 
 (c) Notices.
Any notice, request, claim, demand, document and other communication hereunder to any Party shall be effective upon receipt (or refusal of receipt) and shall be in writing and delivered personally or sent by facsimile or certified or registered
mail, postage prepaid, as follows: 
 (i) If to the Company or the Parent, the General Counsel of the Parent at its headquarters, 

(ii) If to Executive, at the last address that the Company or the Parent has in its personnel records for Executive, or 

(iii) At any other address as any Party shall have specified by notice in writing to the other Party. 

(d) Counterparts. This Agreement may be executed in several counterparts, each of which shall be deemed to be an original, but all of
which together will constitute one and the same Agreement. Signatures delivered by facsimile shall be deemed effective for all purposes. 

(e) Entire Agreement. The terms of this Agreement and the Proprietary Information Agreement are intended by the Parties to be the final
expression of their agreement with respect to the subject matter hereof and thereof and supersede all prior understandings and agreements, whether written or oral, including, without limitation, that certain offer letter between Executive and the
Parent, dated as of December 1, 2015 and the Original Employment Agreement. The Parties further intend that this Agreement and the Proprietary Information Agreement shall constitute the complete and exclusive statement of their terms and that
no extrinsic evidence whatsoever may be introduced in any judicial, administrative, or other legal proceeding to vary the terms of this Agreement or the Proprietary Information Agreement. 

(f) Amendments; Waivers. This Agreement may not be modified, amended, or terminated except by an instrument in writing, signed by
Executive and a duly authorized officer of the Parent or the Company. By an instrument in writing similarly executed, Executive or a duly authorized officer of the Company or the Parent may waive compliance by the other Party with any specifically
identified provision of this Agreement that such other Party was or is obligated to comply with or perform; provided, however, that such waiver shall not operate as a 

  
 10 

 
waiver of, or estoppel with respect to, any other or subsequent failure. No failure to exercise and no delay in exercising any right, remedy, or power hereunder preclude any other or further
exercise of any other right, remedy, or power provided herein or by law or in equity. 
 (g) No Inconsistent Actions. The Parties
hereto shall not voluntarily undertake or fail to undertake any action or course of action inconsistent with the provisions or essential intent of this Agreement. Furthermore, it is the intent of the Parties hereto to act in a fair and reasonable
manner with respect to the interpretation and application of the provisions of this Agreement. 
 (h) Construction. This Agreement
shall be deemed drafted equally by both the Parties. Its language shall be construed as a whole and according to its fair meaning. Any presumption or principle that the language is to be construed against any Party shall not apply. The headings in
this Agreement are only for convenience and are not intended to affect construction or interpretation. Any references to paragraphs, subparagraphs, sections or subsections are to those parts of this Agreement, unless the context clearly indicates to
the contrary. Also, unless the context clearly indicates to the contrary, (a) the plural includes the singular and the singular includes the plural; (b) “and” and “or” are each used both conjunctively and disjunctively; (c)
“any, “all,” “each,” or “every” means “any and all”, and “each and every”; (d) “includes” and “including” are each “without limitation”; (e) “herein,”
“hereof,” “hereunder” and other similar compounds of the word “here” refer to the entire Agreement and not to any particular paragraph, subparagraph, section or subsection; and (f) all pronouns and any variations
thereof shall be deemed to refer to the masculine, feminine, neuter, singular or plural as the identity of the entities or persons referred to may require. 

(i) Arbitration. Any controversy, claim or dispute arising out of or relating to this Agreement, shall be settled solely and exclusively
by a binding arbitration process administered by JAMS/Endispute in Boston, Massachusetts. Such arbitration shall be conducted in accordance with the then-existing JAMS/Endispute Rules of Practice and Procedure, with the following exceptions if in
conflict: (a) one arbitrator who is a retired judge shall be chosen by JAMS/Endispute; (b) each Party to the arbitration will pay one-half of the expenses and fees of the arbitrator, together with
other expenses of the arbitration incurred or approved by the arbitrator; and (c) arbitration may proceed in the absence of any Party if written notice (pursuant to the JAMS/Endispute rules and regulations) of the proceedings has been given to
such Party. Each Party shall bear its own attorneys’ fees and expenses; provided that the arbitrator may assess the prevailing Party’s fees and costs against the non-prevailing Party as part of the
arbitrator’s award. The Parties agree to abide by all decisions and awards rendered in such proceedings. Such decisions and awards rendered by the arbitrator shall be final and conclusive. All such controversies, claims or disputes shall be
settled in this manner in lieu of any action at law or equity; provided, however, that nothing in this subsection shall be construed as precluding the bringing an action for injunctive relief or specific performance as provided in this Agreement or
the Proprietary Information Agreement. This dispute resolution process and any arbitration hereunder shall be confidential and neither any Party nor the neutral arbitrator shall disclose the existence, contents or results of such process without the
prior written consent of all Parties, except where necessary or compelled in a Court to enforce this arbitration provision or an award from such arbitration or otherwise in a legal proceeding. If JAMS/Endispute no longer exists or is otherwise
unavailable, the Parties agree that the American Arbitration Association (“AAA”) shall administer the arbitration in accordance with its then-existing rules as modified by this subsection. In such event, all references herein to
JAMS/Endispute shall mean AAA. 

  
 11 

 (j) Enforcement. If any provision of this Agreement is held to be illegal, invalid or
unenforceable under present or future laws effective during the term of this Agreement, such provision shall be fully severable; this Agreement shall be construed and enforced as if such illegal, invalid or unenforceable provision had never
comprised a portion of this Agreement; and the remaining provisions of this Agreement shall remain in full force and effect and shall not be affected by the illegal, invalid or unenforceable provision or by its severance from this Agreement.
Furthermore, in lieu of such illegal, invalid or unenforceable provision there shall be added automatically as part of this Agreement a provision as similar in terms to such illegal, invalid or unenforceable provision as may be possible and be
legal, valid and enforceable. 
 (k) Withholding. The Company shall be entitled to withhold from any amounts payable under this
Agreement any federal, state, local or foreign withholding or other taxes or charges which the Company is required to withhold. The Company shall be entitled to rely on an opinion of counsel if any questions as to the amount or requirement of
withholding shall arise. 
 (l) Survival. Notwithstanding anything to the contrary in this Agreement, the provisions of Sections
5 through 8 will survive the termination of Executive’s employment and the expiration or termination of the Term. 
 (m)
Section 409A. 
 (i) General. The intent of the Parties is that the payments and benefits under this Agreement comply with
or be exempt from Section 409A of the Internal Revenue Code of 1986, as amended, and the regulations and guidance promulgated thereunder (collectively, “Section 409A”) and, accordingly, to the maximum extent permitted, this
Agreement shall be interpreted to be in compliance therewith. 
 (ii) Separation from Service. Notwithstanding anything in this
Agreement to the contrary, any compensation or benefits payable under this Agreement that are designated under this Agreement as payable upon Executive’s termination of employment shall be payable only upon Executive’s “separation
from service” with the Company within the meaning of Section 409A (a “Separation from Service”) and, except as provided below, any such compensation or benefits described in Sections 4(b) and 4(c) shall not
be paid, or, in the case of installments, shall not commence payment, until the 30th day following Executive’s Separation from Service (the “First Payment Date”). Any installment payments that would have been made to Executive
during the 30-day period immediately following Executive’s Separation from Service but for the preceding sentence shall be paid to Executive on the First Payment Date and the remaining payments shall be
made as provided in this Agreement. 
 (iii) Specified Employee. Notwithstanding anything in this Agreement to the contrary, if
Executive is deemed by the Company at the time of Executive’s Separation from Service to be a “specified employee” for purposes of Section 409A, to the extent delayed commencement of any portion of the benefits to which Executive
is entitled under this Agreement is required in order to avoid a prohibited distribution under Section 409A, such portion of Executive’s benefits shall not be provided to Executive prior to the earlier of (i) the 

  
 12 

 
expiration of the 6-month period measured from the date of Executive’s Separation from Service with the Company or (ii) the date of
Executive’s death. Upon the first business day following the expiration of the applicable Section 409A period, all payments deferred pursuant to the preceding sentence shall be paid in a lump sum to Executive (or Executive’s estate or
beneficiaries), and any remaining payments due to Executive under this Agreement shall be paid as otherwise provided herein. 
 (iv)
Expense Reimbursements. To the extent that any reimbursements under this Agreement are subject to Section 409A, any such reimbursements payable to Executive shall be paid to Executive no later than December 31 of the year following the
year in which the expense was incurred, provided that Executive submits Executive’s reimbursement request promptly following the date the expense is incurred. The amount of expenses reimbursed in one year shall not affect the amount eligible
for reimbursement in any subsequent year, other than medical expenses referred to in Section 105(b) of the Code, and Executive’s right to reimbursement under this Agreement will not be subject to liquidation or exchange for another
benefit. 
 (v) Installments. Executive’s right to receive any installment payments under this Agreement, including without
limitation any continuation of salary payments that are payable on Company payroll dates, shall be treated as a right to receive a series of separate payments and, accordingly, each such installment payment shall at all times be considered a
separate and distinct payment as permitted under Section 409A. Except as otherwise permitted under Section 409A, no payment hereunder shall be accelerated or deferred unless such acceleration or deferral would not result in additional tax
or interest pursuant to Section 409A. 
 9. Executive Acknowledgement. 

Executive acknowledges that Executive has read and understands this Agreement, is fully aware of its legal effect, has not acted in reliance
upon any representations or promises made by the Company other than those contained in writing herein, and has entered into this Agreement freely based on Executive’s own judgment. 

10. Third Party Beneficiary Rights. 

The Parent has third party beneficiary rights to the terms of this Agreement applicable to the Company. 

[Signature Page Follows] 

  
 13 

 IN WITNESS WHEREOF, the persons below have executed this Agreement on the date and year first
above written. 
  

			
	PARENT
		
	By:	 	 /s/ Ton Logtenberg

		 	Ton Logtenberg
		 	Chief Executive Officer
		
	By:	 	 /s/ Shelley Margetson

		 	Shelley Margetson
		 	Chief Financial Officer
	
	COMPANY
		
	By:	 	 /s/ Ton Logtenberg

		 	Ton Logtenberg
		 	Chief Executive Officer
		
	By:	 	 /s/ Shelley Margetson

		 	Shelley Margetson
		 	Chief Financial Officer
	
	EXECUTIVE
		
	By:	 	 /s/ Hui Liu

		 	Hui Liu

 EXHIBIT A 

Separation Agreement and Release 

This Separation Agreement and Release (“Agreement”) is made by and between Hui Liu (“Executive”)
and             (the “Company”) (collectively referred to as the “Parties” or individually referred to as a “Party”). Capitalized terms
used but not defined in this Agreement shall have the meanings set forth in the Employment Agreement (as defined below). 
 WHEREAS, the
Parties have previously entered into that certain Employment Agreement, dated as of                     (the “Employment
Agreement”); and 
 WHEREAS, in connection with Executive’s termination of employment with the Company or a subsidiary or
affiliate of the Company effective                 , 20        , the Parties wish to resolve any and all disputes, claims,
complaints, grievances, charges, actions, petitions, and demands that Executive may have against the Company and any of the Releasees as defined below, including, but not limited to, any and all claims arising out of or in any way related to
Executive’s employment with or separation from the Company or its subsidiaries or affiliates but, for the avoidance of doubt, nothing herein will be deemed to release any rights or remedies in connection with Executive’s ownership of
vested equity securities of the Company or Executive’s right to indemnification by the Company or any of its affiliates pursuant to contract or applicable law (collectively, the “Retained Claims”). 

NOW, THEREFORE, in consideration of the severance payments and benefits described in Section 4 of the Employment Agreement, which,
pursuant to the Employment Agreement, are conditioned on Executive’s execution and non-revocation of this Agreement, and in consideration of the mutual promises made herein, the Company and Executive
hereby agree as follows: 
 1. Severance Payments; Salary and Benefits. The Company agrees to provide Executive with the severance
payments and benefits described in Section 4(b) or Section 4(c) of the Employment Agreement, payable at the times set forth in, and subject to the terms and conditions of, the Employment Agreement. In addition, to the extent not already
paid, and subject to the terms and conditions of the Employment Agreement, the Company shall pay or provide to Executive all other payments or benefits described in Section 3(c) of the Employment Agreement, subject to and in accordance with the
terms thereof. 
 2. Release of Claims. Executive agrees that, other than with respect to the Retained Claims, the foregoing
consideration represents settlement in full of all outstanding obligations owed to Executive by the Company, any of its direct or indirect parents, subsidiaries and affiliates, and any of their current and former officers, directors, equity holders,
managers, employees, agents, investors, attorneys, shareholders, administrators, affiliates, benefit plans, plan administrators, insurers, trustees, divisions, and subsidiaries and predecessor and successor corporations and assigns (collectively,
the “Releasees”). Executive, on Executive’s own behalf and on behalf of any of Executive’s affiliated companies or entities and any of their respective heirs, family members, executors, agents, and assigns, other than with
respect to the Retained Claims, hereby and forever releases the Releasees from, and agrees not to sue concerning, or in any manner to institute, prosecute, or pursue, any claim, complaint, charge, duty, obligation, or cause of action relating to any
matters of any kind, whether presently known or unknown, 

 
suspected or unsuspected, that Executive may possess against any of the Releasees arising from any omissions, acts, facts, or damages that have occurred up until and including the Effective Date
of this Agreement (as defined in Section 7 below), including, without limitation: 
 (a) any and all claims relating to or arising from
Executive’s employment or service relationship with the Company or any of its direct or indirect subsidiaries or affiliates and the termination of that relationship; 

(b) any and all claims relating to, or arising from, Executive’s right to purchase, or actual purchase of any shares of stock or other
equity interests of the Company or any of its affiliates, including, without limitation, any claims for fraud, misrepresentation, breach of fiduciary duty, breach of duty under applicable state corporate law, and securities fraud under any state or
federal law; 
 (c) any and all claims for wrongful discharge of employment; termination in violation of public policy; discrimination;
harassment; retaliation; breach of contract, both express and implied; breach of covenant of good faith and fair dealing, both express and implied; promissory estoppel; negligent or intentional infliction of emotional distress; fraud; negligent or
intentional misrepresentation; negligent or intentional interference with contract or prospective economic advantage; unfair business practices; defamation; libel; slander; negligence; personal injury; assault; battery; invasion of privacy; false
imprisonment; conversion; and disability benefits; 
 (d) any and all claims for violation of any federal, state, or municipal statute,
including, but not limited to, Title VII of the Civil Rights Act of 1964; the Civil Rights Act of 1991; the Rehabilitation Act of 1973; the Americans with Disabilities Act of 1990; the Equal Pay Act; the Fair Credit Reporting Act; the Age
Discrimination in Employment Act of 1967;the Older Workers Benefit Protection Act; the Employee Retirement Income Security Act of 1974; the Worker Adjustment and Retraining Notification Act; the Family and Medical Leave Act; and the Sarbanes-Oxley
Act of 2002; 
 (e) any and all claims for violation of the federal or any state constitution; 

(f) any and all claims arising out of any other laws and regulations relating to employment or employment discrimination; 

(g) any claim for any loss, cost, damage, or expense arising out of any dispute over the
non-withholding or other tax treatment of any of the proceeds received by Executive as a result of this Agreement; and 

(h) any and all claims for attorneys’ fees and costs. 

Executive agrees that the release set forth in this section shall be and remain in effect in all respects as a complete general release as to the matters
released. This release does not release claims that cannot be released as a matter of law, including, but not limited to, Executive’s right to report possible violations of federal law or regulation to any governmental agency or entity in
accordance with the provisions of and rules promulgated under Section 21F of the Securities Exchange Act of 1934 or Section 806 of the Sarbanes-Oxley Act of 2002, or any other 

  
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 whistleblower protection provisions of state or federal law or regulation, Executive’s right to file a
charge with or participate in a charge by the Equal Employment Opportunity Commission, or any other local, state, or federal administrative body or government agency that is authorized to enforce or administer laws related to employment, against the
Company (with the understanding that Executive’s release of claims herein bars Executive from recovering such monetary relief from the Company or any Releasee), claims for unemployment compensation or any state disability insurance benefits
pursuant to the terms of applicable state law, claims to continued participation in certain of the Company’s group benefit plans pursuant to the terms and conditions of COBRA, claims to any benefit entitlements vested as the date of separation
of Executive’s employment, pursuant to written terms of any employee benefit plan of the Company or its affiliates and Executive’s right under applicable law and any Retained Claims. This release further does not release claims for breach
of Section 3(c), Section 4(b) or Section 4(c) of the Employment Agreement. 
 3. Acknowledgment of Waiver of Claims under
ADEA. Executive understands and acknowledges that Executive is waiving and releasing any rights Executive may have under the Age Discrimination in Employment Act of 1967 (“ADEA”), and that this waiver and release is knowing and
voluntary. Executive understands and agrees that this waiver and release does not apply to any rights or claims that may arise under the ADEA after the Effective Date of this Agreement. Executive understands and acknowledges that the consideration
given for this waiver and release is in addition to anything of value to which Executive was already entitled. Executive further understands and acknowledges that Executive has been advised by this writing that: (a) Executive should consult
with an attorney prior to executing this Agreement; (b) Executive has 21 days within which to consider this Agreement; (c) Executive has 7 days following Executive’s execution of this Agreement to revoke this Agreement pursuant to
written notice to the General Counsel of the Company; (d) this Agreement shall not be effective until after the revocation period has expired; and (e) nothing in this Agreement prevents or precludes Executive from challenging or seeking a
determination in good faith of the validity of this waiver under the ADEA, nor does it impose any condition precedent, penalties, or costs for doing so, unless specifically authorized by federal law. In the event Executive signs this Agreement and
returns it to the Company in less than the 21 day period identified above, Executive hereby acknowledges that Executive has freely and voluntarily chosen to waive the time period allotted for considering this Agreement. 

4. Severability. In the event that any provision or any portion of any provision hereof or any surviving agreement made a part hereof
becomes or is declared by a court of competent jurisdiction or arbitrator to be illegal, unenforceable, or void, this Agreement shall continue in full force and effect without said provision or portion of provision. 

5. No Oral Modification. This Agreement may only be amended in a writing signed by Executive and a duly authorized officer of the
Company. 
 6. Governing Law; Dispute Resolution. This Agreement shall be subject to the provisions of Sections 9(a), 9(c) and 9(i) of
the Employment Agreement. 
 7. Effective Date. If Executive has attained or is over the age of 40 as of the date of Executive’s
termination of employment, then each Party has seven days after that Party signs this Agreement to revoke it and this Agreement will become effective on the eighth day after 

  
 A-3 

 
Executive signed this Agreement, so long as it has been signed by the Parties and has not been revoked by either Party before that date (the “Effective Date”). If Executive has
not attained the age of 40 as of the date of Executive’s termination of employment, then the “Effective Date” shall be the date on which Executive signs this Agreement. 

8. Voluntary Execution of Agreement. Executive understands and agrees that Executive executed this Agreement voluntarily, without any
duress or undue influence on the part or behalf of the Company or any third party, with the full intent of releasing all of Executive’s claims against the Company and any of the other Releasees. Executive acknowledges that: (a) Executive
has read this Agreement; (b) Executive has not relied upon any representations or statements made by the Company that are not specifically set forth in this Agreement; (c) Executive has been represented in the preparation, negotiation, and
execution of this Agreement by legal counsel of Executive’s own choice or has elected not to retain legal counsel; (d) Executive understands the terms and consequences of this Agreement and of the releases it contains; and
(e) Executive is fully aware of the legal and binding effect of this Agreement. 
 IN WITNESS WHEREOF, the Parties have executed this
Agreement on the respective dates set forth below. 
  

			
	 Dated:
                            
	  	  

		  	 Hui Liu

		
		  	COMPANY
		
	 Dated:
                            
	  	
By:                  
                                         
                                  

		  	       Name:

		  	       Title:

  
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