Document:

EX-10.9

 Exhibit 10.9 

DIRECTOR NOMINATION AGREEMENT 

THIS DIRECTOR NOMINATION AGREEMENT (this “Agreement”) is made and entered into as of [●], 2021, by and among Integral
Ad Science Holding Corp., a Delaware corporation (the “Company”), Vista Equity Partners Fund VI, L.P., Vista Equity Partners Fund VI-A, L.P., VEPF VI FAF, L.P., Vista Equity Partners Fund VI
GP, L.P., VEPF VI GP, Ltd., and VEP Group, LLC (collectively, “Vista”). This Agreement shall be effective from the date hereof (the “Effective Date”). 

WHEREAS, as of the date hereof, Vista beneficially owns a majority of the equity interests in the Company; 

WHEREAS, Vista is contemplating causing the Company to effect an initial public offering (the “IPO”); 

WHEREAS, Vista currently has the authority to appoint all directors of the Company; 

WHEREAS, in consideration of Vista agreeing to undertake the IPO, the Company has agreed to permit Vista to designate persons for nomination
for election to the board of directors of the Company (the “Board”) following the Effective Date on the terms and conditions set forth herein; 

NOW, THEREFORE, in consideration of the mutual covenants contained herein and other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, each of the parties to this Agreement agrees as follows: 
 1. Board Nomination Rights.

 (a) From the Effective Date, Vista shall have the right, but not the obligation, to nominate to the Board a number of designees equal to
at least: (i) 100% of the Total Number of Directors (as defined below), so long as Vista Beneficially Owns shares of common stock, par value $0.001 per share (the “Common Stock”) representing at least 40% of the Original Amount
of Vista, (ii) 40% of the Total Number of Directors, in the event that Vista Beneficially Owns shares of Common Stock representing at least 30% but less than 40% of the Original Amount of Vista, (iii) 30% of the Total Number of Directors, in the
event that Vista Beneficially Owns shares of Common Stock representing at least 20% but less than 30% of the Original Amount of Vista, (iv) 20% of the Total Number of Directors, in the event that Vista Beneficially Owns shares of Common Stock
representing at least 10% but less than 20% of the Original Amount of Vista and (v) one Director, in the event that Vista Beneficially Owns shares of Common Stock representing at least 5% of the Original Amount of Vista (such persons, the
“Nominees”). For purposes of calculating the number of directors that Vista is entitled to designate pursuant to the immediately preceding sentence, any fractional amounts shall automatically be rounded up to the nearest whole
number (e.g., 11⁄4 Directors shall equate to 2 Directors) and any such calculations shall be made after taking into account any increase in the Total Number of
Directors. 

 (b) In the event that Vista has nominated less than the total number of designees Vista
shall be entitled to nominate pursuant to Section 1(a), Vista shall have the right, at any time, to nominate such additional designees to which it is entitled, in which case, the Company and the Directors shall take all
necessary corporation action (including increasing the size of the Board to create a vacancy), to the fullest extent permitted by applicable law (including with respect to fiduciary duties under Delaware law), to (x) enable Vista to nominate
and effect the election or appointment of such additional individuals, whether by increasing the size of the Board, or otherwise and (y) to designate such additional individuals nominated by Vista to fill such newly created vacancies or to fill
any other existing vacancies. 
 (c) In addition to the nomination rights set forth in Section 1(a) above, from
the Effective Date, for so long as Vista Beneficially Owns shares of Common Stock representing at least 5% of the Original Amount of Vista, Vista shall have the right, but not the obligation, to designate a person (a “Non-Voting Observer”) to attend meetings of the Board (including any meetings of any committees thereof) in a non-voting observer capacity. Any such Non-Voting Observer shall be permitted to attend all meetings of the Board. Vista shall have the right to remove and replace its Non-Voting Observer at any time and from time
to time. The Company shall furnish to any Non-Voting Observer (i) notices of Board meetings no later than, and using the same form of communication as, notice of Board meetings are furnished to directors
and (ii) copies of any materials prepared for meetings of the Board that are furnished to the directors no later than the time such materials are furnished to the directors; provided that failure to deliver notice, or materials, to such Non-Voting Observer in connection with such Non-Voting Observer’s right to attend and/or review materials with respect to, any meeting of the Board shall not, by itself,
impair the validity of any action taken by such Board at such meeting. Such Non-Voting Observer shall be required to execute or otherwise become subject to any codes of conduct or confidentiality agreements of
the Company generally applicable to directors of the Company or as the Company reasonably requests. Notwithstanding the foregoing, the Company reserves the right to withhold any information and to exclude the
Non-Voting Observer from receiving any materials and/or attending any meeting or portion thereof if access to such information or attendance at such meeting could adversely affect the attorney-client privilege
between the Company and its counsel. 
 (d) The Company shall pay all reasonable out-of-pocket expenses incurred by the Nominees and the Non-Voting Observer in connection with the performance of his or her duties as a director or a Non-Voting Observer and in connection with his or her attendance at any meeting of the Board. 
 (e)
“Affiliate” of any person shall mean any other person controlled by, controlling or under common control with such person; where “control” (including, with its correlative meanings, “controlling,”
“controlled by” and “under common control with”) means possession, directly or indirectly, of power to direct or cause the direction of management or policies (whether through ownership of securities, by contract or
otherwise). 
 (f) “Beneficially Own” shall mean that a specified person has or shares the right, directly or indirectly,
through any contract, arrangement, understanding, relationship or otherwise, to vote shares of capital stock of the Company. 

  
 2 

 (g) “Director” means any member of the Board. 

(h) “Original Amount of Vista” means the aggregate number of shares of Common Stock held, directly or indirectly, by Vista on
the date hereof, as such number may be adjusted from time to time for any reorganization, recapitalization, stock dividend, stock split, reverse stock split or other similar changes in the Company’s capitalization. 

(i) “Total Number of Directors” means the total number of Directors comprising the Board. 

(j) No reduction in the number of shares of Common Stock that Vista Beneficially Owns shall shorten the term of any incumbent director. At the
Effective Date, the Board shall be comprised of nine members including Michael Fosnaugh, Rod Aliabadi, Martin Taylor, Brooke Nakatsukasa, Lisa Utzschneider, Jill Putman, Otto Berkes and Bridgette Heller, and Christina Lema as the director nominee to
be approved as of the Effective Date. 
 (k) In the event that any Nominee shall cease to serve for any reason, Vista shall be entitled to
designate such person’s successor in accordance with this Agreement (regardless of Vista’s beneficial ownership in the Company at the time of such vacancy) and the Board shall promptly fill the vacancy with such successor nominee; it being
understood that any such designee shall serve the remainder of the term of the director whom such designee replaces. 
 (l) If a Nominee is
not appointed or elected to the Board because of such person’s death, disability, disqualification, withdrawal as a nominee or for other reason is unavailable or unable to serve on the Board, Vista shall be entitled to designate promptly
another nominee and the director position for which the original Nominee was nominated shall not be filled pending such designation. 
 (m)
So long as Vista has the right to nominate Nominees under Section 1(a) or any such Nominee is serving on the Board, the Company shall use its reasonable best efforts to maintain in effect at all times directors and officers indemnity insurance
coverage reasonably satisfactory to Vista, and the Company’s Certificate of Incorporation and Bylaws (each as may be further amended, supplemented or waived in accordance with its terms) shall at all times provide for indemnification,
exculpation and advancement of expenses to the fullest extent permitted under applicable law. 
 (n) If the size of the Board is expanded,
Vista shall be entitled to nominate a number of Nominees to fill the newly created vacancies such that the total number of Nominees serving on the Board following such expansion will be equal to that number of Nominees that Vista would be entitled
to nominate in accordance with Section 1(a) if such expansion occurred immediately prior to any meeting of the stockholders of the Company called with respect to the election of members of the Board, and the Board shall
appoint such Nominees to the Board. 
 (o) At such time as the Company ceases to be a “controlled company” and is required by
applicable law or NASDAQ Global Select Market (the “Exchange”) listing standards to have a majority of the Board comprised of “independent directors” (subject in each case to any applicable

  
 3 

 
phase-in periods), Vista’s Nominees shall include a number of persons that qualify as “independent directors” under applicable law and the
Exchange listing standards such that, together with any other “independent directors” then serving on the Board that are not Nominees, the Board is comprised of a majority of “independent directors.” 

(p) At any time that Vista shall have any nomination rights under Section 1, the Company shall not take any action,
including making or recommending any amendment to the Certificate of Incorporation or the Company’s Bylaws that could reasonably be expected to adversely affect Vista’s rights under this Agreement, in each case without the prior written
consent of Vista. 
 (q) The Company recognizes that each Nominee (i) will from time to time
receive non-public information concerning the Company, and (ii) may share such information with other individuals associated with Vista that designated such Nominee. The Company hereby
irrevocably consents to such sharing. Vista agrees that it will keep confidential and not disclose or divulge to any third party any confidential information regarding the Company it receives from the Company or a Nominee, unless such information
(x) is available or becomes available to the public in general, (y) is or has been independently developed or conceived by Vista without use of the Company’s confidential information or (z) is or has been made known or disclosed
to Vista by a third party without a breach of any obligation of confidentiality such third party may have to the Company; provided, however, that Vista may disclose confidential information (I) to its Affiliates (other than portfolio
companies), (II) to each of its and its Affiliate’s (other than portfolio companies) attorneys, accountants, consultants, advisors and other professionals to the extent necessary to obtain their services in connection with evaluating the
information, or (III) as may be required by law or legal, judicial or regulatory process or requested by any regulatory or self-regulatory authority or examiner, provided that Vista takes reasonable steps to minimize the extent of any required
disclosure described in this clause (III) 
 2. Company Obligations. The Company agrees to use its reasonable best efforts to ensure
that prior to the date that Vista and its Affiliates cease to Beneficially Own shares of Common Stock representing at least 5% of the total voting power of the then outstanding Common Stock, (i) each Nominee is included in the Board’s
slate of nominees to the stockholders (the “Board’s Slate”) for each election of directors; and (ii) each Nominee is included in the proxy statement prepared by management of the Company in connection with soliciting
proxies for every meeting of the stockholders of the Company called with respect to the election of members of the Board (each, a “Director Election Proxy Statement”), and at every adjournment or postponement thereof, and on every
action or approval by written consent of the stockholders of the Company or the Board with respect to the election of members of the Board. Vista will promptly provide reporting to the Company after Vista ceases to Beneficially Own shares of Common
Stock representing at least 5% of the total voting power of the then outstanding Common Stock, such that Company is informed of when this obligation terminates. The calculation of the number of Nominees that Vista is entitled to nominate to the
Board’s Slate for any election of directors shall be based on the percentage of the total voting power of the then outstanding Common Stock then Beneficially Owned by Vista (“Vista Voting Control”) immediately prior to the
mailing to shareholders of the Director Election Proxy Statement relating to such election (or, if earlier, the filing of the definitive Director Election Proxy Statement with the U.S. Securities and Exchange

  
 4 

 
Commission). Unless Vista notifies the Company otherwise prior to the mailing to shareholders of the Director Election Proxy Statement relating to an election of directors (or, if earlier, the
filing of the definitive Director Election Proxy Statement with the U.S. Securities and Exchange Commission), the Nominees for such election shall be presumed to be the same Nominees currently serving on the Board, and no further action shall be
required of Vista for the Board to include such Nominees on the Board’s Slate; provided, that, in the event Vista is no longer entitled to nominate the full number of Nominees then serving on the Board, Vista shall provide advance written
notice to the Company, of which currently servicing Nominee(s) shall be excluded from the Board Slate, and of any other changes to the list of Nominees. If Vista fails to provide such notice prior to the mailing to shareholders of the Director
Election Proxy Statement relating to such election (or, if earlier, the filing of the definitive Director Election Proxy Statement with the U.S. Securities and Exchange Commission), a majority of the independent directors then serving on the Board
shall determine which of the Nominees of Vista then serving on the Board will be included in the Board’s Slate. Furthermore, the Company agrees for so long as the Company qualifies as a “controlled company” under the rules of the
Exchange the Company will elect to be a “controlled company” for purposes of the Exchange and will disclose in its annual meeting proxy statement that it is a “controlled company” and the basis for that determination. The Company
and Vista acknowledge and agree that, as of the Effective Date, the Company is a “controlled company.” The Company agrees to provide written notice of the preparation of a Director Election Proxy Statement to the Lead Sponsors at least 20
business days, but no more than 40 business days, prior to the earlier of the mailing and the filing date of any Director Election Proxy Statement. 

3. Committees. From and after the Effective Date hereof until such time as Vista and its Affiliates cease to Beneficially Own shares of
Common Stock representing at least 5% of the total voting power of the then outstanding Common Stock, Vista shall have the right to designate a number of members of each committee of the Board equal to the nearest whole number greater than the
product obtained by multiplying (a) the percentage of the total voting power of the then outstanding Common Stock then Beneficially Owned by Vista and (b) the number of positions, including any vacancies, on the applicable committee,
provided that any such designee shall be a director and shall be eligible to serve on the applicable committee under applicable law or listing standards of the Exchange, including any applicable independence requirements (subject in each case to any
applicable exceptions, including those for newly public companies and for “controlled companies,” and any applicable phase-in periods). Any additional members shall be determined by the Board.
Nominees designated to serve on a Board committee shall have the right to remain on such committee until the next election of directors, regardless of the level of Vista Voting Control following such designation. Unless Vista notifies the Company
otherwise prior to the time the Board takes action to change the composition of a Board committee, and to the extent Vista has the requisite Vista Voting Control for Vista to nominate a Board committee member at the time the Board takes action to
change the composition of any such Board committee, any Nominee currently designated by Vista to serve on a committee shall be presumed to be re-designated for such committee. 

4. Amendment and Waiver. Any provision of this Agreement may be amended or waived if, but only if, such amendment or waiver is in
writing and is signed, in the case of an amendment, by the Company and Vista, or in the case of a waiver, by the party against whom the waiver is to be effective. No failure or delay by any party in exercising any right, power or privilege

  
 5 

 
hereunder shall operate as a waiver thereof nor shall any single or partial exercise thereof preclude any other or further exercise thereof or the exercise of any other right, power or privilege.
The rights and remedies herein provided shall be cumulative and not exclusive of any rights or remedies provided by law. Vista shall not be obligated to nominate all (or any) of the Nominees it is entitled to nominate pursuant to this Agreement for
any election of directors but the failure to do so shall not constitute a waiver of its rights hereunder with respect to future elections; provided, however, that in the event Vista fails to nominate all (or any) of the Nominees it is
entitled to nominate pursuant to this Agreement prior to the mailing to shareholders of the Director Election Proxy Statement relating to such election (or, if earlier, the filing of the definitive Director Election Proxy Statement with the
U.S. Securities and Exchange Commission), the Compensation and Nominating Committee of the Board shall be entitled to nominate individuals in lieu of such Nominees for inclusion in the Board’s Slate and the applicable Director Election
Proxy Statement with respect to the election for which such failure occurred and Vista shall be deemed to have waived its rights hereunder with respect to such election. The rights and remedies herein provided shall be cumulative and not exclusive
of any rights or remedies provided by law. 
 5. Benefit of Parties. This Agreement shall be binding upon and shall inure to the
benefit of the parties hereto and their respective permitted successors and assigns. Notwithstanding the foregoing, the Company may not assign any of its rights or obligations hereunder without the prior written consent of Vista. Except as otherwise
expressly provided in Section 6, nothing herein contained shall confer or is intended to confer on any third party or entity that is not a party to this Agreement any rights under this Agreement. 

6. Assignment. Upon written notice to the Company, Vista may assign to any Affiliate of Vista (other than a portfolio company) all of
its rights hereunder and, following such assignment, such assignee shall be deemed to be “Vista” for all purposes hereunder. 

7. Indemnification. 
 (a)
The Company shall defend, indemnify and hold harmless Vista, its Affiliates, partners, employees, agents, directors, managers, officers and controlling Persons (collectively, the “Indemnified Parties”) from and against any and all
actions, causes of action, suits, claims, liabilities, losses, damages, costs, expenses, or obligations of any kind or nature (whether accrued or fixed, absolute or contingent) in connection therewith (including reasonable attorneys’ fees and
expenses) incurred by the Indemnified Parties before or after the date of this Agreement (each, an “Action”) arising directly or indirectly out of, or in any way relating to, (i) Vista’s or its Affiliates’ Beneficial
Ownership of Common Stock or other equity securities of the Company or control or ability to influence the Company or any of its subsidiaries (other than any such Actions (x) to the extent such Actions arise out of any breach of this Agreement
by an Indemnified Party or its Affiliates or the breach of any fiduciary or other duty or obligation of such Indemnified Party to its direct or indirect equity holders, creditors or Affiliates or (y) to the extent such Actions are directly
caused by such Person’s willful misconduct), (ii) the business, operations, properties, assets or other rights or liabilities of the Company or any of its subsidiaries or (iii) any services provided prior, on or after the date of this
Agreement by Vista or its Affiliates to the Company or any of its subsidiaries. The Company shall defend at its own cost and expense in respect of any Action which may be brought against the Company and/or its Affiliates and the Indemnified

  
 6 

 
Parties. The Company shall defend at its own cost and expense any and all Actions which may be brought in which the Indemnified Parties may be impleaded with others upon any Action by the
Indemnified Parties, except that if such damage shall be proven to be the direct result of gross negligence, bad faith or willful misconduct by any of the Indemnified Parties, then such Indemnified Party shall reimburse the Company for the costs of
defense and other costs incurred by the Company in proportion to such Indemnified Party’s culpability as proven. In the event of the assertion against any Indemnified Party of any Action or the commencement of any Action, the Company shall be
entitled to participate in such Action and in the investigation of such Action and, after written notice from the Company to such Indemnified Party, to assume the investigation or defense of such Action with counsel of the Company’s choice at
the Company’s expense; provided, however, that such counsel shall be reasonably satisfactory to the Indemnified Party. Notwithstanding anything to the contrary contained herein, the Company may retain one firm of counsel to represent all
Indemnified Parties in such Action; provided, however, that the Indemnified Party shall have the right to employ a single firm of separate counsel (and any necessary local counsel) and to participate in the defense or investigation of such Action
and the Company shall bear the expense of such separate counsel (and local counsel, if applicable), if (x) in the opinion of counsel to the Indemnified Party use of counsel of the Company’s choice could reasonably be expected to give rise
to a conflict of interest, (y) the Company shall not have employed counsel satisfactory to the Indemnified Party to represent the Indemnified Party within a reasonable time after notice of the assertion of any such Action or (z) the
Company shall authorize the Indemnified Party to employ separate counsel at the Company’s expense. The Company further agrees that with respect to any Indemnified Party who is employed, retained or otherwise associated with, or appointed or
nominated by, Vista or any of its Affiliates and who acts or serves as a director, officer, manager, fiduciary, employee, consultant, advisor or agent of, for or to the Company or any of its subsidiaries, that the Company or such subsidiaries, as
applicable, shall be primarily liable for all indemnification, reimbursements, advancements or similar payments (the “Indemnity Obligations”) afforded to such Indemnified Party acting in such capacity or capacities on behalf or at
the request of the Company, whether the Indemnity Obligations are created by law, organizational or constituent documents, contract (including this Agreement) or otherwise. The Company hereby agrees that in no event shall the Company or any of its
subsidiaries have any right or claim against Vista for contribution or have rights of subrogation against Vista through an Indemnified Party for any payment made by the Company or any of its subsidiaries with respect to any Indemnity Obligation. In
addition, the Company hereby agrees that in the event that Vista pay or advance an Indemnified Party any expenses with respect to an Indemnity Obligation, the Company will, or will cause its subsidiaries to, as applicable, promptly reimburse Vista,
for such payment or advance upon request; subject to the receipt by the Company of a written undertaking executed by the Indemnified Party and Vista, that makes such payment or advance to repay any such amounts if it shall ultimately be determined
by a court of competent jurisdiction that such Indemnified Party was not entitled to be indemnified by the Company. The foregoing right to indemnity shall be in addition to any rights that any Indemnified Party may have at common law or otherwise
and shall remain in full force and effect following the completion or any termination of the engagement. If for any reason the foregoing indemnification is unavailable to any Indemnified Party or insufficient to hold it harmless as and to the extent
contemplated by this Section 7, then the Company shall contribute to the amount paid or payable by the Indemnified Party as a result of such Action in such proportion as is appropriate to reflect the relative benefits received by the Company,
on the one hand, and the Indemnified Party, as the case may be, on the other hand, as well as any other relevant equitable considerations. 

  
 7 

 (b) The Company hereby acknowledges that the certain of the Indemnified Parties have certain
rights to indemnification, advancement of expenses and/or insurance provided by investment funds managed by Vista and certain of their Affiliates (collectively, the “Fund Indemnitors”). The Company hereby agrees with respect to any
indemnification, hold harmless obligation, expense advancement or reimbursement provision or any other similar obligation whether pursuant to or with respect to this Agreement, the organizational documents of the Company or any of its subsidiaries
or any other agreement, as applicable, (i) that the Company and its subsidiaries are the indemnitor of first resort (i.e., their obligations to the Indemnified Parties are primary and any obligation of the Fund Indemnitors to advance expenses
or to provide indemnification for claims, expenses or obligations arising out of the same or similar facts and circumstances suffered by any Indemnified Party are secondary), (ii) that the Company shall be required to advance the full amount of
expenses incurred by any Indemnified Party and shall be liable for the full amount of all expenses, liabilities, obligations, judgments, penalties, fines, and amounts paid in settlement to the extent legally permitted and as required by the terms of
this Agreement, the organizational documents of the Company or any of its subsidiaries or any other agreement, as applicable, without regard to any rights any Indemnified Party may have against the Fund Indemnitors, and (iii) that the Company,
on behalf of itself and each of its subsidiaries, irrevocably waives, relinquishes and releases the Fund Indemnitors from any and all Actions against the Fund Indemnitors for contribution, subrogation or any other recovery of any kind in respect
thereof. The Company further agrees that no advancement or payment by the Fund Indemnitors on behalf of any Indemnified Party with respect to any Action for which any Indemnified Party has sought indemnification from the Company shall affect the
foregoing and the Fund Indemnitors shall have a right of contribution and/or be subrogated to the extent of such advancement or payment to all of the rights of recovery of any Indemnified Party against the Company. The Company agrees that the Fund
Indemnitors are express third-party beneficiaries of the terms of this Section 7(b). 
 8. Headings. Headings are for ease of
reference only and shall not form a part of this Agreement. 
 9. Governing Law. This Agreement shall be construed in accordance with
and governed by the law of the State of Delaware without giving effect to the principles of conflicts of laws thereof. 
 10.
Jurisdiction. Any suit, action or proceeding seeking to enforce any provision of, or based on any matter arising out of or in connection with, this Agreement may be brought against any of the parties in any federal court located in the State
of Delaware or any Delaware state court, and each of the parties hereby consents to the exclusive jurisdiction of such court (and of the appropriate appellate courts) in any such suit, action or proceeding and waives any objection to venue laid
therein. Process in any such suit, action or proceeding may be served on any party anywhere in the world, whether within or without the jurisdiction of any such court. Without limiting the foregoing, each of the parties agrees that service of
process upon such party at the address referred to in Section 17, together with written notice of such service to such party, shall be deemed effective service of process upon such party. 

  
 8 

 11. WAIVER OF JURY TRIAL. EACH OF THE PARTIES HERETO HEREBY IRREVOCABLY WAIVES ANY
AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR IN CONNECTION WITH THIS AGREEMENT. 
 12. Entire Agreement.
This Agreement constitutes the entire agreement among the parties with respect to the subject matter hereof and supersedes all prior agreements, understandings and negotiations, both written and oral among the parties with respect to the subject
matter hereof. 
 13. Counterparts; Effectiveness. This Agreement may be signed in any number of counterparts, each of which shall be
deemed an original. This Agreement shall become effective when each party shall have received a counterpart hereof signed by each of the other parties. An executed copy or counterpart hereof delivered by facsimile shall be deemed an original
instrument. 
 14. Severability. If any provision of this Agreement or the application thereof to any person or circumstance shall be
invalid or unenforceable to any extent, the remainder of this Agreement and the application of such provisions to other persons or circumstances shall not be affected thereby and shall be enforced to the greatest extent permitted by law. 

15. Further Assurances. Each of the parties hereto shall execute and deliver such further instruments and do such further acts and
things as may be required to carry out the intent and purpose of this Agreement. 
 16. Specific Performance. Each of the parties
hereto agree that irreparable damage would occur if any provision of this Agreement were not performed in accordance with the terms hereof and that the parties shall be entitled to an injunction or injunctions to prevent breaches of this Agreement
or to enforce specifically the performance of the terms and provisions hereof in any federal or state court located in the State of Delaware, in addition to any other remedy to which they are entitled at law or in equity. 

17. Notices. All notices, requests and other communications to any party or to the Company shall be in writing (including telecopy or
similar writing) and shall be given, 
 If to the Company: 

Integral Ad Science Holding Corp. 

95 Morton St, FL 8 
 New York, NY
10014 
 Attention: Micah Nessan, General Counsel 

Email: ************************* 

With a copy to (which shall not constitute notice): 

Kirkland & Ellis LLP 

300 North LaSalle Street 

  
 9 

 Chicago, IL 60654 

Attention: Robert Hayward, P.C. 

     Robert Goedert, P.C. 

Email: ************************* 

If to any member of Vista or any Nominee: 

c/o Vista Equity Partners 
 4
Embarcadero Center 
 20th Floor 

San Francisco, California 94111 

Attention: David Breach 

     Christina Lema 

Facsimile: ************************* 

With a copy to (which shall not constitute notice): 

Kirkland & Ellis LLP 

300 North LaSalle Street 

Chicago, IL 60654 
 Attention:
Robert Hayward, P.C. 
      Robert Goedert, P.C. 

Email: ************************* 
 or to such
other address or telecopier number as such party or the Company may hereafter specify for the purpose by notice to the other parties and the Company. Each such notice, request or other communication shall be effective when delivered at the address
specified in this Section 17 during regular business hours. 
 18. Enforcement. Each of the parties hereto
covenant and agree that the disinterested members of the Board have the right to enforce, waive or take any other action with respect to this Agreement on behalf of the Company. 

*        *        *       
 *        * 

  
 10 

 IN WITNESS WHEREOF, the parties hereto have executed this Agreement on the date first above
written. 
  

			
	INTEGRAL AD SCIENCE HOLDING CORP.
		
	By:	 	
                     
                       

	Name:
	Title:
	
	VISTA EQUITY PARTNERS FUND VI, L.P.
	
	By: VISTA EQUITY PARTNERS FUND VI GP, L.P.
	Its: General Partner
	
	By: VEPF VI GP, Ltd.
	Its: General Partner
		
	By:	 	
                     
                                   

	Name: Robert F. Smith
	Its: Director
	
	VISTA EQUITY PARTNERS FUND VI-A, L.P.
	
	By: VISTA EQUITY PARTNERS FUND VI GP, L.P.
	Its: General Partner
	
	By: VEPF VI GP, Ltd.
	Its: General Partner
		
	By:	 	
                    

	Name: Robert F. Smith
	Its: Director
	
	VEPF VI FAF, L.P.
	
	By: VISTA EQUITY PARTNERS FUND VI GP, L.P.
	Its: General Partner
	
	By: VEPF VI GP, Ltd.
	Its: General Partner
		
	By:	 	
                     
   

	Name: Robert F. Smith
	Its: Director

 [Signature Page to Director Nomination Agreement] 

			
	VISTA EQUITY PARTNERS FUND VI GP, L.P.
	
	By: VEPF VI GP, Ltd.
	Its: General Partner
		
	By:	 	  

	Name: Robert F. Smith
	Its: Director
	
	VEPF VI GP, Ltd.
		
	By:	 	  

	Name: Robert F. Smith
	Its: Director
	
	VEP GROUP, LLC
		
	By:	 	
                     
           

	Name: Robert F. Smith
	Its: Managing Member

 [Signature Page to Director Nomination Agreement]EX-10.10

 Exhibit 10.10 

INTEGRAL AD SCIENCE HOLDING CORP. 
  

 
 2021 EMPLOYEE
STOCK PURCHASE PLAN 
  
  

ARTICLE I 
 PURPOSE

 The Plan’s purpose is to assist employees of the Company and its Designated Companies in acquiring a share ownership interest in
the Company, and to help such employees provide for their future security and to encourage them to remain in the employment of the Company and its Subsidiaries and Affiliates. 

The Plan consists of two components: the Section 423 Component and the Non-Section 423
Component. The Section 423 Component is intended to qualify as an “employee stock purchase plan” under Section 423 of the Code and shall be administered, interpreted and construed in a manner consistent with the requirements of
Section 423 of the Code. In addition, the Plan authorizes the grant of Options under the Non-Section 423 Component, which need not qualify as Options granted pursuant to an “employee stock
purchase plan” under Section 423 of the Code; such Options granted under the Non-Section 423 Component shall be granted pursuant to separate Offerings containing such sub-plans, appendices, rules or procedures as may be adopted by the Administrator and designed to achieve tax, securities laws or other objectives for Eligible Employees and the Designated Companies
in locations outside of the United States. Except as otherwise provided herein or determined by the Administrator, the Non-Section 423 Component will operate and be administered in the same manner as
the Section 423 Component. Offerings intended to be made under the Non-Section 423 Component will be designated as such by the Administrator at or prior to the time of such Offering. 

For purposes of the Plan, the Administrator may designate separate Offerings under the Plan, the terms of which need not be identical, in
which Eligible Employees may participate, provided that the terms of participation are the same within each separate Offering under the Section 423 Component as determined under Section 423 of the Code. Solely by way of example and without
limiting the foregoing, the Company could, but shall not be required to, provide for simultaneous Offerings under the Section 423 Component and the Non-Section 423 Component of the Plan. 

ARTICLE II 
 DEFINITIONS

 As used in the Plan, the following words and phrases have the meanings specified below, unless the context clearly indicates
otherwise: 
 2.1 “Administrator” means the Committee, or such individuals to which authority to administer
the Plan has been delegated under Section 7.1 hereof. 

 2.2 “Affiliate” means a corporation or other entity
controlled by, controlling, or under control with the Company. The term “control” (including, with correlative meaning, the terms “controlled by” and “under common control with”), as applied to any person, means the
possession, directly or indirectly, of the power to direct or cause the direction of management and policies of such person, whether through the ownership of voting or other securities, by contract or otherwise. 

2.3 “Agent” means the brokerage firm, bank or other financial institution, entity or person(s), if any,
engaged, retained, appointed or authorized to act as the agent of the Company or an Employee with regard to the Plan. 
 2.4
“Board” means the Board of Directors of the Company. 
 2.5 “Code” means the U.S.
Internal Revenue Code of 1986, as amended from time to time. Any reference to any section of the Code shall also be a reference to any successor provision and any guidance and treasury regulation promulgated thereunder. 

2.6 “Committee” means the Compensation and Nominating Committee of the Board. 

2.7 “Common Stock” means the common stock, USD 0.01 par value per share, of the Company. 

2.8 “Company” means Integral Ad Science Holding Corp., a Delaware corporation, and its successors by operation
of law. 
 2.9 “Compensation” of an Employee means the regular straight-time earnings or base salary,
commissions and payments received for overtime and shift premiums received by such Employee as compensation for services to the Company or any Designated Company, determined before giving effect to any salary reduction agreement pursuant to
(a) a qualified cash or deferred arrangement (within the meaning of Section 401(k) of the Code), or (b) a cafeteria plan (within the meaning of Section 125 of the Code). Compensation shall exclude any annual incentive
compensation or other payments made under any bonus program, vacation pay, holiday pay, jury duty pay, funeral leave pay, military leave pay, education or tuition reimbursements, travel expenses, business and moving reimbursements, imputed income
arising under any group insurance or benefit program, income received in connection with any share options, share appreciation rights, restricted shares, restricted share units or other compensatory equity awards, fringe benefits, other special or one-time payments (e.g., retention or sign-on bonuses) and all contributions made by the Company or any Designated Subsidiary for the Employee’s benefit under any
employee benefit plan now or hereafter established. The Administrator, in its discretion, may establish a different definition of Compensation for an Offering, which for the Section 423 Component shall apply on a uniform and nondiscriminatory
basis. Further, the Administrator will have discretion to determine the application of this definition to Eligible Employees outside the United States. 

 2.10 “Designated Company” means each Affiliate and
Subsidiary, including any Affiliate and Subsidiary in existence on the Effective Date and any Affiliate and Subsidiary formed or acquired following the Effective Date, that has been designated by the Administrator from time to time in its sole
discretion as eligible to participate in the Plan, in accordance with Section 7.2 hereof, such designation to specify whether such participation is in the Section 423 Component
or Non-Section 423 Component. A Designated Company may participate in either the Section 423 Component or Non-Section 423 Component, but not
both. Notwithstanding the foregoing, if any Affiliate or Subsidiary is disregarded for U.S. federal income tax purposes in respect of the Company or any Designated Company participating in the Section 423 Component, then such disregarded
Affiliate or Subsidiary shall automatically be a Designated Company participating in the Section 423 Component. If any Affiliate or Subsidiary is disregarded for U.S. federal income tax purposes in respect of any Designated Company
participating in the Non-Section 423 Component, the Administrator may exclude such Affiliate or Subsidiary from participating in the Plan, notwithstanding that the Designated Company in respect of
which such Affiliate or Subsidiary is disregarded may participate in the Plan. 
 2.11 “Effective Date” means
the date the Plan is adopted by the Board, subject to approval of the Company’s shareholders. 
 2.12 “Eligible
Employee” means any Employee of the Company or a Designated Company who has completed at least six (6) months of continuous service with the Company. The Administrator, in its discretion, may also exclude any or all of the
following unless prohibited by applicable law, Employees: 
 (a) who are customarily scheduled to work 20 hours or less per week; 

(b) whose customary employment is not more than five months in a calendar year; 

(c) who are not employed by the Company or a Designated Company prior to the applicable Enrollment Date occurs; and 

(d) any Employee who is a “highly compensated employee” of the Company or any Designated Company (within the meaning of
Section 414(q) of the Code), or that is such a “highly compensated employee” (A) with compensation above a specified level, (B) who is an officer or (C) who is subject to the disclosure requirements of Section 16(a) of
the Exchange Act; or 
 (e) any Employee who is a citizen or resident of a jurisdiction outside the United States (without regard to whether
they are also a citizen of the United States or a resident alien (within the meaning of Section 7701(b)(1)(A) of the Code)) if either (A) the grant of the Option is prohibited under the laws of the jurisdiction governing such Employee, or
(B) compliance with the laws of the jurisdiction would cause the Section 423 Component, any Offering thereunder or an Option granted thereunder to violate the requirements of Section 423 of the Code; provided that any
exclusion shall be applied in an identical manner under each Offering to all Employees in accordance with Treas. Reg. § 1.423-2(e). 

 Notwithstanding the foregoing, any Employee who, after the granting of the Option, would be deemed for
purposes of Section 423(b)(3) of the Code to possess 5% or more of the total combined voting power or value of all classes of shares of the Company or any Subsidiary shall not be an Eligible Employee. For purposes of the preceding sentence, the
rules of Section 424(d) of the Code with regard to the attribution of share ownership shall apply in determining the share ownership of an individual, and shares which an Employee may purchase under outstanding options under the Plan shall be
treated as shares owned by the Employee. 
 Further, with respect to the Non-Section 423 Component,
(a) the Administrator may limit eligibility further within a Designated Company so as to only designate some Employees of a Designated Company as Eligible Employees, and (b) to the extent any restrictions in this definition are not
consistent with applicable local laws, the applicable local laws shall control. 
 2.13 “Employee” means any
person who renders services to the Company or a Designated Company in the status of an employee within the meaning of Section 3401(c) of the Code. “Employee” shall not include any director of the Company or a Designated Company who
does not render services to the Company or a Designated Company in the status of an employee within the meaning of Section 3401(c) of the Code. For purposes of the Plan, the employment relationship shall be treated as continuing intact while
the individual is on military leave, sick leave or other leave of absence approved by the Company or a Designated Company and meeting the requirements of Treas. Reg. § 1.421-1(h)(2). Where the
period of leave exceeds three months, or such other period specified in Treas. Reg. § 1.421-1(h)(2), and the individual’s right to reemployment is not guaranteed either by statute or by
contract, the employment relationship shall be deemed to have terminated on the first day immediately following such three (3)-month period, or such other period specified in Treas. Reg.
§ 1.421-1(h)(2). 
 2.14 “Enrollment Date” means the first
date of each Offering Period. 
 2.15 “Exercise Date” means the last day of each Purchase Period, except as
provided in Section 5.2 hereof. 
 2.16 “Exchange Act” means the U.S. Securities Exchange Act of 1934,
as amended from time to time. Reference to a specific section of the Exchange Act or regulation thereunder shall include such section or regulation, any valid regulation or interpretation promulgated under such section, and any comparable provision
of any future legislation or regulation amending, supplementing, or superseding such section or regulation. 
 2.17 “Fair
Market Value” means, as of any date, the value of the Common Stock determined as follows: 
 (a) If the Common Stock is
(i) listed on any established securities exchange (such as the New York Stock Exchange or Nasdaq Stock Market), (ii) listed on any national market system or (iii) listed, quoted or traded on any automated quotation system, the Fair Market
Value of a Share shall be the closing sales price for a Share as quoted on such exchange or system for such date or, if there is no closing sales price for a Share on the date in question, the closing sales price for a Share on the last preceding
date for which such quotation exists, as reported in The Wall Street Journal or such other source as the Administrator deems reliable; 

 (b) If the Common Stock is not listed on an established securities exchange, national market
system or automated quotation system, but the Common Stock is regularly quoted by a recognized securities dealer, the Fair Market Value of a Share shall be the mean of the high bid and low asked prices for such date or, if there are no high bid and
low asked prices for a Share on such date, the high bid and low asked prices for a Share on the last preceding date for which such information exists, as reported in The Wall Street Journal or such other source as the Administrator
deems reliable; or 
 (c) If the Common Stock is neither listed on an established securities exchange, national market system or automated
quotation system nor regularly quoted by a recognized securities dealer, the Fair Market Value of a Share shall be established by the Administrator in good faith. 

2.18 “Grant Date” means the first day of an Offering Period. 

2.19 “New Exercise Date” has the meaning set forth in Section 5.2(b) hereof. 

2.20 “Non-Section 423 Component” means
those Offerings under the Plan, together with the sub-plans, appendices, rules or procedures, if any, adopted by the Administrator as a part of the Plan, in each case, pursuant to which Options may
be granted to Eligible Employees that need not satisfy the requirements for Options granted pursuant to an “employee stock purchase plan” that are set forth under Section 423 of the Code. 

2.21 “Offering” means an offer under the Plan of an Option that may be exercised during an Offering Period as
further described in Article 4 hereof. Unless otherwise specified by the Administrator, each Offering to Eligible Employees shall be deemed a separate Offering, even if the dates and other terms of the applicable Purchase Periods of each such
Offering are identical and the provisions of the Plan will separately apply to each Offering. To the extent permitted by Treas. Reg. § 1.423-2(a)(1), the terms of each separate Offering under
the Section 423 Component need not be identical, provided that the terms of the Section 423 Component and an Offering thereunder together satisfy Treas. Reg. § 1.423-2(a)(2) and
(a)(3). 
 2.22 “Offering Period” means the periods of approximately twenty-four (24) months during which
Options shall be granted to Participants, commencing on such Trading Day as designated by the Administrator and terminating on a Trading Day approximately twenty-four (24) months later, each as determined by the Administrator in its sole discretion.
The duration and timing of Offering Periods may be established or changed by the Administrator at any time, in its sole discretion and may consist of one or more Purchase Periods. Notwithstanding the foregoing, in no event may an Offering Period
exceed 27 months. 

 2.23 “Option” means the right to purchase Shares pursuant to
the Plan during each Offering Period. 
 2.24 “Option Price” means the purchase price of a Share hereunder as
provided in Section 4.2 hereof. 
 2.25 “Parent” means any entity that is a parent corporation of the
Company within the meaning of Section 424 of the Code. 
 2.26 “Participant” means any Eligible Employee
who elects to participate in the Plan. 
 2.27 “Payday” means the regular and recurring established day for
payment of Compensation to an Employee. 
 2.28 “Plan” means this Employee Stock Purchase Plan, including
both the Section 423 Component and Non-Section 423 Component and any other sub-plans or appendices hereto, as amended from time to time. 

2.29 “Plan Account” means a bookkeeping account established and maintained by the Company in the name of each
Participant. 
 2.30 “Purchase Period” means the period commencing on the first Trading Day of each Offering
Period and terminating on the last Trading Day of each Offering Period, as determined by the Administrator in its sole discretion. The duration and timing of Purchase Periods may be established or changed by the Administrator at any time, in its
sole discretion. Notwithstanding the foregoing, in no event may a Purchase Period exceed the duration of the Offering Period under which it is established. 

2.31 “Section 409A” means the nonqualified deferred compensation rules under
Section 409A of the Code and any applicable treasury regulations and other official guidance thereunder. 
 2.32
“Section 423 Component” means those Offerings under the Plan that are intended to meet the requirements under Section 423(b) of the Code. 

2.33 “Shares” means shares of Common Stock. 

2.34 “Subsidiary” means any subsidiary corporation of the Company within the meaning of Section 424(f) of
the Code. 
 2.35
“Tax-Related Items” means any U.S. and non-U.S. federal, provincial, state and/or local taxes
(including, without limitation, income tax, social insurance contributions, fringe benefit tax, employment tax, stamp tax and any employer tax liability which has been transferred to a Participant) for which a Participant is liable in connection
with his or her participation in the Plan. 
 2.36 “Treas. Reg.” means U.S. Department of the Treasury
regulations. 
 2.37 “Withdrawal Election” has the meaning set forth in Section 6.1(a) hereof. 

 ARTICLE III 

PARTICIPATION 
 3.1
Eligibility. 
 (a) Any Eligible Employee who is employed by the Company or a Designated Company on a given Enrollment
Date for an Offering Period shall be eligible to participate in the Plan during such Offering Period, subject to the requirements of Articles 4 and 5 hereof, and, for the Section 423 Component, the limitations imposed by Section 423(b) of
the Code. 
 (b) No Eligible Employee shall be granted an Option under the Section 423 Component which permits the Participant to
purchase Shares under the Plan, and to purchase shares under all other employee stock purchase plans of the Company, any Parent or any Subsidiary subject to Section 423 of the Code, at a rate which exceeds USD 25,000 of fair market value
of such shares (determined at the time such Option is granted) for each calendar year in which such Option is outstanding at any time. The limitation under this Section 3.1(b) shall be applied in accordance with Section 423(b)(8) of the
Code. 
 3.2 Election to Participate; Payroll Deductions. 

(a) Each individual who is an Eligible Employee as of an Offering Period’s Enrollment Date may elect to participate in such Offering
Period and the Plan by delivering to the Company or an Agent designated by the Company an enrollment form including a payroll deduction authorization (which may be in an electronic format or such other method as determined by the Company in
accordance with the Company’s practices) (a “Participation Election”) no later than the period of time prior to the applicable Enrollment Date determined by the Administrator, in its sole discretion. Except as provided
in Section 3.2(e) hereof, an Eligible Employee may participate in the Plan only by means of payroll deduction. 
 (b) Subject to
Section 3.1(b) hereof and except as may otherwise be determined by the Administrator, payroll deductions (i) shall equal at least 1% of the Participant’s Compensation as of each Payday of the Offering Period following the Enrollment
Date, but not more than 15% of the Participant’s Compensation as of each Payday of the Offering Period following the Enrollment Date; and (ii) shall be expressed as a whole number percentage. Subject to Section 3.2(e)
hereof, amounts deducted from a Participant’s Compensation with respect to an Offering Period pursuant to this Section 3.2 shall be deducted each Payday through payroll deduction and credited to the Participant’s Plan Account. 

(c) Unless otherwise determined by the Administrator, following at least one payroll deduction, a Participant may increase or decrease the
percentage of Compensation or the fixed dollar amount designated in his or her enrollment form, subject to the limits of this Section 3.2, or may suspend his or her payroll deductions, at any time during an Offering Period; provided,
however, that the Administrator may limit the number of changes a Participant may make to his or her payroll deduction elections during each Offering Period in the applicable Offering (and in the absence of any specific designation by the
Administrator, a Participant shall only be allowed to decrease his or her payroll deduction election one time during each Offering Period and shall not 

 
be permitted to increase his or her payroll deduction at any time during an Offering Period). Any such change or suspension of payroll deductions shall be effective with the first full payroll
period following ten business days after the Company’s receipt of the new enrollment form (or such shorter or longer period as may be specified by the Administrator in the applicable Offering). In the event a Participant suspends his or her
payroll deductions, such Participant’s cumulative payroll deductions prior to the suspension shall remain in his or her account and shall be applied to the purchase of Shares on the next occurring Exercise Date and shall not be paid to such
Participant unless he or she withdraws from participation in the Plan pursuant to Section 6.1. 
 (d) Upon the completion of an
Offering Period, each Participant in such Offering Period shall automatically participate in the immediately following Offering Period at the same payroll deduction percentage as in effect at the termination of such Offering Period, unless such
Participant delivers to the Company or an Agent designated by the Company a different Participation Election with respect to the successive Offering Period in accordance with Section 3.2(a) hereof, or unless such Participant becomes ineligible
for participation in the Plan. 
 (e) Notwithstanding any other provisions of the Plan to the contrary,
in non-U.S. jurisdictions where participation in the Plan through payroll deductions is prohibited or otherwise problematic under applicable local laws (as determined by the Administrator in its sole
discretion), the Administrator may provide that an Eligible Employee may elect to participate through contributions to the Participant’s Plan Account in a form acceptable to the Administrator in lieu of or in addition to payroll deductions;
provided, however, that, for any Offering under the Section 423 Component, the Administrator must determine that any alternative method of contribution is applied on an equal and uniform basis to all Eligible Employees in the Offering. Any
reference to “payroll deductions” in this Section 3.2 (or in any other section of the Plan) will similarly cover contributions by other means made pursuant to this Section 3.2(e). 

ARTICLE IV 
 PURCHASE OF
SHARES 
 4.1 Grant of Option. The Company may make one or more Offerings under the Plan, which may be successive
or overlapping with one another, until the earlier of: (i) the date on which all Shares available under the Plan have been purchased or (ii) the date on which the Plan is suspended or terminates. No Offering shall commence prior to the
date on which the Company’s registration statement on Form S-8 is filed with the U.S. Securities and Exchange Commission in respect of the Plan. The Administrator shall designate the terms and
conditions of each Offering in writing, including without limitation, the Offering Period and the Purchase Periods. Each Participant shall be granted an Option with respect to an Offering Period on the applicable Grant Date. Subject to the
limitations of Section 3.1(b) hereof, the number of Shares subject to a Participant’s Option shall be determined by dividing (a) such Participant’s payroll deductions accumulated prior to an Exercise Date and retained in the
Participant’s Plan Account on such Exercise Date by (b) the applicable Option Price. 

 
The Administrator may, for future Offering Periods, increase or decrease, in its absolute discretion, the maximum number of Shares that a Participant may purchase during any Purchase Periods
under such future Offering Periods. Each Option shall expire on the last Exercise Date for the applicable Offering Period immediately after the automatic exercise of the Option in accordance with Section 4.3 hereof, unless such Option
terminates earlier in accordance with Article 6 hereof. 
 4.2 Option Price. The Option Price shall equal 85% of the
lesser of the Fair Market Value of a Share on (a) the applicable Grant Date and (b) the applicable Exercise Date, or such other price designated by the Administrator. 

4.3 Purchase of Shares. 

(a) On each Exercise Date for an Offering Period, each Participant shall automatically and without any action on such Participant’s part
be deemed to have exercised the Participant’s Option to purchase at the applicable Option Price the largest number of whole Shares which can be purchased with the amount in the Participant’s Plan Account, subject to the limitations set
forth in the Plan. Unless otherwise determined by the Administrator in advance of an Offering or in accordance with applicable law, any balance that is remaining in the Participant’s Plan Account (after exercise of such Participant’s
Option) as of the Exercise Date shall be carried forward into the next Offering Period, unless the Participant has properly elected to withdraw from the Plan, has ceased to be an Eligible Employee or with respect to the maximum limitations set forth
in Section 3.1(b) and Section 4.1. Any balance not carried forward to the next Offering Period in accordance with the prior sentence shall promptly be refunded as soon as administratively practicable to the applicable Participant. 

(b) As soon as practicable following each Exercise Date, the number of Shares purchased by such Participant pursuant to Section 4.3(a)
hereof shall be delivered (either in share certificate or book entry form), in the Company’s sole discretion, to either (i) the Participant or (ii) an account established in the Participant’s name at a stock brokerage or other
financial services firm designated by the Company. The Company may require that shares be retained with such brokerage or firm for a designated period of time and/or may establish procedures to permit tracking of disqualifying dispositions of such
shares. 
 4.4 Transferability of Rights. An Option granted under the Plan shall not be transferable, other than by
will or the applicable laws of descent and distribution, and is exercisable during the Participant’s lifetime only by the Participant. No option or interest or right to the Option shall be available to pay off any debts, contracts or
engagements of the Participant or the Participant’s successors in interest or shall be subject to disposition by pledge, encumbrance, assignment or any other means whether such disposition be voluntary or involuntary or by operation of law by
judgment, levy, attachment, garnishment or any other legal or equitable proceedings (including bankruptcy), and any attempt at disposition of the Option shall have no effect. 

 ARTICLE V 

PROVISIONS RELATING TO COMMON STOCK 

5.1 Shares Reserved. Subject to adjustment as provided in Section 5.2 hereof, the aggregate number of Shares that
may be issued pursuant to rights granted under the Plan shall be the sum of (a) [•] Shares and (b) an annual increase on the first day of each year beginning on January 1, 2022 and annually thereafter ending in 2031 equal to the
lesser of (i) 1% of all classes of the Company’s shares outstanding on the last day of the immediately preceding calendar year and (ii) such smaller number of shares as may be determined by the Board; provided, however, no more than
[•] Shares may be issued in total under the 423 Component of the Plan. Shares made available for sale under the Plan may be authorized but unissued shares or treasury Shares. If any right granted under the Plan shall for any reason terminate
without having been exercised, the Shares not purchased under such right shall again become available for issuance under the Plan. 
 5.2
Adjustments Upon Changes in Capitalization, Dissolution, Liquidation, Merger or Asset Sale. 
 (a) Changes in
Capitalization. Subject to any required action by the shareholders of the Company, the number of Shares which have been authorized for issuance under the Plan but not yet placed under Option, as well as the price per share and the number of
Shares covered by each Option under the Plan which has not yet been exercised shall be proportionately adjusted for any increase or decrease in the number of issued Shares resulting from a share split, reverse share split, share dividend,
combination, amalgamation, consolidation, reorganization, arrangement or reclassification of the Shares, or any other increase or decrease in the number Shares effected without receipt of consideration by the
Company; provided, however, that conversion of any convertible securities of the Company shall not be deemed to have been “effected without receipt of consideration.” Such adjustment shall be made by the
Administrator, whose determination in that respect shall be final, binding and conclusive. Except as expressly provided herein, no issuance by the Company of shares of any class, or securities convertible into shares of any class, shall affect, and
no adjustment by reason thereof shall be made with respect to, the number or price of Shares subject to an Option. 
 (b) Dissolution or
Liquidation. In the event of the proposed dissolution or liquidation of the Company, the Offering Periods then in progress shall be shortened by setting a new Exercise Date (the “New Exercise Date”), and shall terminate
immediately prior to the consummation of such proposed dissolution or liquidation, unless provided otherwise by the Administrator. The New Exercise Date shall be before the date of the Company’s proposed dissolution or liquidation. The
Administrator shall notify each Participant in writing, at least ten business days prior to the New Exercise Date, that the Exercise Date for the Participant’s Option has been changed to the New Exercise Date and that the
Participant’s Option shall be exercised automatically on the New Exercise Date, unless prior to such date the Participant has withdrawn from the Offering Period as provided in Section 6.1 hereof or the Participant has ceased to be an
Eligible Employee as provided in Section 6.2 hereof. 

 (c) Merger or Asset Sale. In the event of a proposed sale of all or substantially all
of the assets of the Company, or the merger of the Company with or into another corporation, each outstanding Option shall be assumed or an equivalent Option substituted by the successor corporation or a parent or subsidiary of the successor
corporation. If the successor corporation refuses to assume or substitute for the Option, any Offering Periods then in progress shall be shortened by setting a New Exercise Date and any Offering Periods then in progress shall end on the New Exercise
Date. The New Exercise Date shall be before the date of the Company’s proposed sale or merger. The Administrator shall notify each Participant in writing, at least ten business days prior to the New Exercise Date, that the Exercise Date for the
Participant’s Option has been changed to the New Exercise Date and that the Participant’s Option shall be exercised automatically on the New Exercise Date, unless prior to such date the Participant has withdrawn from the Offering Period as
provided in Section 6.1 hereof or the Participant has ceased to be an Eligible Employee as provided in Section 6.2 hereof. 

5.3 Insufficient Shares. If the Administrator determines that, on a given Exercise Date, the number of Shares with
respect to which Options are to be exercised may exceed the number of Shares remaining available for sale under the Plan on such Exercise Date, the Administrator shall make a pro rata allocation of the Shares available for issuance on such Exercise
Date in as uniform a manner as shall be practicable and as it shall determine in its sole discretion to be equitable among all Participants exercising Options to purchase Shares on such Exercise Date, and unless additional shares are authorized for
issuance under the Plan, no further Offering Periods shall take place and the Plan shall terminate pursuant to Section 7.5 hereof. If an Offering Period is so terminated, then the balance of the amount credited to the Participant’s Plan
Account which has not been applied to the purchase of Shares shall be paid to such Participant in one lump sum in cash within 30 days after such Exercise Date, without any interest thereon (except as may be required by applicable local laws). 

5.4 Rights as Shareholders. With respect to Shares subject to an Option, a Participant shall not be deemed to be a
shareholder of the Company and shall not have any of the rights or privileges of a shareholder. A Participant shall have the rights and privileges of a shareholder of the Company when, but not until, the Shares have been deposited in the designated
brokerage account following exercise of the Participant’s Option. 
 ARTICLE VI 

TERMINATION OF PARTICIPATION 

6.1 Cessation of Contributions; Voluntary Withdrawal. 

(a) A Participant may cease payroll deductions during an Offering Period and elect to withdraw from the Plan by delivering written notice of
such election to the Company or an Agent designated by the Company in such form and at such time prior to the Exercise Date for such Offering Period as may be established by the Administrator (a “Withdrawal Election”). In the
event a Participant elects to withdraw from the Plan, amounts then credited to such Participant’s Plan Account shall be returned to the Participant in one lump-sum payment in cash within 30 days
after such election is received by the Company, without any interest thereon (except as may be required by applicable local laws), and the Participant shall cease to participate in the Plan and the Participant’s Option for such Offering Period
shall terminate upon receipt of the Withdrawal Election.  

 (b) A Participant’s withdrawal from the Plan shall not have any effect upon the
Participant’s eligibility to participate in any similar plan which may hereafter be adopted by the Company or in succeeding Offering Periods which commence after the termination of the Offering Period from which the Participant withdraws. 

(c) A Participant who ceases contributions to the Plan during any Offering Period shall not be permitted to resume contributions to the Plan
during that Offering Period. 
 6.2 Termination of Eligibility. Upon a Participant’s ceasing to be an Eligible
Employee, for any reason, such Participant’s Option for the applicable Offering Period shall automatically terminate, the Participant shall be deemed to have elected to withdraw from the Plan, and any balance on such Participant’s Plan
Account shall be paid to such Participant or, in the case of the Participant’s death, to the person or persons entitled thereto pursuant to applicable law, within 30 days after such cessation of being an Eligible Employee, without any interest
thereon (except as may be required by applicable local laws). If a Participant transfers employment from the Company or any Designated Company participating in the Section 423 Component to any Designated Company participating in the Non-Section 423 Component, such transfer shall not be treated as a termination of employment, but the Participant shall immediately cease to participate in the Section 423 Component; however, any
contributions made for the Offering Period in which such transfer occurs shall be transferred to the Non-Section 423 Component, and such Participant shall immediately join the then-current Offering
under the Non-Section 423 Component upon the same terms and conditions in effect for the Participant’s participation in the Section 423 Component, except for such modifications otherwise
applicable for Participants in such Offering. A Participant who transfers employment from any Designated Company participating in the Non-Section 423 Component to the Company or any Designated
Company participating in the Section 423 Component shall not be treated as terminating the Participant’s employment and shall remain a Participant in the Non-Section 423 Component until the
earlier of (i) the end of the current Offering Period under the Non-Section 423 Component, or (ii) the Enrollment Date of the first Offering Period in which the Participant is eligible to
participate following such transfer. Notwithstanding the foregoing, the Administrator may establish different rules to govern transfers of employment between companies participating in the Section 423 Component and the Non-Section 423 Component, consistent with the applicable requirements of Section 423 of the Code. 

ARTICLE VII 
 GENERAL
PROVISIONS 
 7.1 Administration. 

(a) The Plan shall be administered by the Committee, which shall be composed of members of the Board. The Committee may delegate
administrative tasks under the Plan to the services of an Agent or Employees to assist in the administration of the Plan, including without limitation, determining the Designated Companies participating in the Plan, establishing and maintaining an
individual securities account under the Plan for each Participant, determining enrollment and withdrawal deadlines and determining exchange rates. In its absolute discretion, the Board may at any time and from time to time exercise any and all
rights and duties of the Administrator under the Plan. 

 (b) It shall be the duty of the Administrator to conduct the general administration of the
Plan in accordance with the provisions of the Plan. The Administrator shall have the power, subject to, and within the limitations of, the express provisions of the Plan: 

(i) To establish and terminate Offerings; 

(ii) To determine when and how Options shall be granted and the provisions and terms of each Offering (which need not be
identical); 
 (iii) To select Designated Companies in accordance with Section 7.2 hereof; and 

(iv) To construe and interpret the Plan, the terms of any Offering and the terms of the Options and to adopt such rules for the
administration, interpretation, and application of the Plan as are consistent therewith and to interpret, amend or revoke any such rules. The Administrator, in the exercise of this power, may correct any defect, omission or inconsistency in the
Plan, any Offering or any Option, in a manner and to the extent it shall deem necessary or expedient to administer the Plan, subject to Section 423 of the Code for the Section 423 Component. 

(c) The Administrator may adopt rules or procedures relating to the operation and administration of the Plan to accommodate the specific
requirements of local laws and procedures, provided that the adoption and implementation of any such rules and/or procedures would not cause the Section 423 Component to be in noncompliance with Section 423 of the Code. Without
limiting the generality of the foregoing, the Administrator is specifically authorized to adopt rules and procedures regarding handling of participation elections, payroll deductions, payment of interest, conversion of local currency, payroll tax,
withholding procedures and handling of share certificates which vary with local requirements. 
 (d) The Administrator may adopt sub-plans applicable to particular Designated Companies or locations, which sub-plans may be designed to be outside the scope of Section 423 of
the Code. The rules of such sub-plans may take precedence over other provisions of the Plan, with the exception of Section 5.1 hereof, but unless otherwise superseded by the terms of such sub-plan, the provisions of the Plan shall govern the operation of such sub-plan. 

(e) All expenses and liabilities incurred by the Administrator in connection with the administration of the Plan shall be borne by the
Company. The Administrator may employ attorneys, consultants, accountants, appraisers, brokers or other persons. The Administrator, the Company and its officers and directors shall be entitled to rely upon the advice, opinions or valuations of any
such persons. All actions taken and all interpretations and determinations made by the Administrator in good faith shall be final and binding upon all Participants, the Company and all other interested persons. No member of the Board or
Administrator shall be personally liable for any action, determination or interpretation made in good faith with respect to the Plan or the Options, and all members of the Board or Administrator shall be fully protected by the Company in respect to
any such action, determination, or interpretation. Any and all risks resulting from any market fluctuations or conditions of any nature and affecting the price of Shares are assumed by the Participant. 

 7.2 Designation of Affiliates and Subsidiaries. The Administrator shall
designate from time to time the Affiliates and Subsidiaries that shall constitute Designated Companies, and determine whether such Designated Companies shall participate in the Section 423 Component
or Non-Section 423 Component; provided, however, that an Affiliate that does not also qualify as a Subsidiary may be designated only as participating in
the Non-Section 423 Component. The Administrator may designate an Affiliate or Subsidiary, or terminate the designation of an Affiliate or Subsidiary, without the approval of the shareholders of the
Company. 
 7.3 Reports. Individual accounts shall be maintained for each Participant in the Plan. Statements of Plan
Accounts shall be given to Participants at least annually, which statements shall set forth the amounts of payroll deductions, the Option Price, the number of shares purchased and the remaining cash balance, if any. 

7.4 No Right to Employment. Nothing in the Plan shall be construed to give any person (including any Participant) the
right to remain in the employ of the Company, a Parent, a Subsidiary or an Affiliate or to affect the right of the Company, any Parent, any Subsidiary or any Affiliate to terminate the employment of any person (including any Participant) at any
time, with or without cause, which right is expressly reserved. 
 7.5 Amendment and Termination of the Plan. 

(a) The Board may, in its sole discretion, amend, suspend or terminate the Plan at any time and from time to time. To the extent necessary to
comply with Section 423 of the Code (or any successor rule or provision), with respect to the Section 423 Component, or any other applicable law, regulation or stock exchange rule, the Company shall obtain shareholder approval of any such
amendment to the Plan in such a manner and to such a degree as required by Section 423 of the Code or such other law, regulation or rule. 

(b) If the Administrator determines that the ongoing operation of the Plan may result in unfavorable financial accounting consequences, the
Administrator may in its discretion modify or amend the Plan to reduce or eliminate such accounting consequence including, but not limited to: 

(i) altering the Option Price for any Offering Period including an Offering Period underway at the time of the change in Option
Price; 
 (ii) shortening any Offering Period so that the Offering Period ends on a new Exercise Date, including an Offering
Period underway at the time of the Administrator action; and 
 (iii) allocating Shares. 

 Such modifications or amendments shall not require shareholder approval or the consent of any Participant.

 (c) Upon termination of the Plan, the balance in each Participant’s Plan Account shall be refunded as soon as practicable after such
termination, without any interest thereon (except as may be required by applicable local laws). 
 7.6 Use of Funds; No
Interest Paid. All funds received by the Company by reason of purchase of shares of Shares under the Plan shall be included in the general funds of the Company free of any trust or other restriction and may be used for any corporate purpose
(except as may be required by applicable local laws). No interest shall be paid to any Participant or credited under the Plan (except as may be required by applicable local laws). 

7.7 Term; Approval by Shareholders. No Option may be granted during any period of suspension of the Plan or after
termination of the Plan. The Plan shall be submitted for the approval of the Company’s shareholders within 12 months after the date of the Board’s initial adoption of the Plan. Options may be granted prior to such shareholder
approval; provided, however, that such Options shall not be exercisable prior to the time when the Plan is approved by the shareholders; provided, further that if such approval has not been
obtained by the end of the 12-month period, all Options previously granted under the Plan shall thereupon terminate and be canceled and become null and void without being exercised. 

7.8 Effect Upon Other Plans. The adoption of the Plan shall not affect any other compensation or incentive plans in
effect for the Company, any Parent, any Subsidiary or any Affiliate. Nothing in the Plan shall be construed to limit the right of the Company, any Parent, any Subsidiary or any Affiliate (a) to establish any other forms of incentives or
compensation for employees of the Company or any Parent, any Subsidiary or any Affiliate, or (b) to grant or assume Options other than under the Plan in connection with any proper corporate purpose, including, but not by way of limitation, the
grant or assumption of options in connection with the acquisition, by purchase, lease, merger, amalgamation, combination, arrangement, consolidation or otherwise, of the business, shares or assets of any corporation, firm or association. 

7.9 Conformity to Securities Laws. Notwithstanding any other provision of the Plan, the Plan and the participation in the
Plan by any individual who is then subject to Section 16 of the Exchange Act shall be subject to any additional limitations set forth in any applicable exemption rule under Section 16 of the Exchange Act (including any amendment to Rule 16b-3 of the Exchange Act) that are requirements for the application of such exemptive rule. To the extent permitted by applicable law, the Plan shall be deemed amended to the extent necessary to
conform to such applicable exemptive rule. 
 7.10 Notice of Disposition of Shares. Each Participant shall give the
Company prompt notice of any disposition or other transfer of any Shares, acquired pursuant to the exercise of an Option granted under the Section 423 Component, if such disposition or transfer is made (a) within two years after the
applicable Grant Date or (b) within one year after the transfer of such Shares to such Participant upon exercise of such Option. The Company may direct that any certificates evidencing shares acquired pursuant to the Plan refer to such
requirement. 

 7.11 Tax Withholding. At the time of any taxable event that creates a
withholding obligation for the Company or any Parent, Affiliate or Subsidiary, the Participant will make adequate provision for any Tax-Related Items. In their sole discretion, and except as
otherwise determined by the Administrator, the Company or the Designated Company that employs or employed the Participant may satisfy their obligations to withhold Tax-Related Items by
(a) withholding from the Participant’s wages or other compensation, (b) withholding a sufficient whole number of Shares otherwise issuable following exercise of the Option having an aggregate value sufficient to pay the Tax-Related Items required to be withheld with respect to the Option and/or shares, or (c) withholding from proceeds from the sale of Shares issued upon exercise of the Option, either through a voluntary sale
or a mandatory sale arranged by the Company, or (d) any other method determined by the Administrator to be in compliance with applicable laws. 

7.12 Governing Law. The Plan and all rights, agreements and obligations hereunder shall be administered, interpreted and
enforced under the laws of the State of Delaware, without regard to the conflict of law rules thereof or of any other jurisdiction. 

7.13 Notices. All notices or other communications by a Participant to the Company under or in connection with the Plan
shall be deemed to have been duly given when received in the form specified by the Company at the location, or by the person, designated by the Company for the receipt thereof. 

7.14 Conditions to Issuance of Shares. 

(a) Notwithstanding anything herein to the contrary, the Company shall not be required to issue or deliver any certificates or make any book
entries evidencing Shares pursuant to the exercise of an Option by a Participant, unless and until the Administrator has determined, with advice of counsel, that the issuance of such Shares is in compliance with all applicable laws, regulations of
governmental authorities and, if applicable, the requirements of any securities exchange or automated quotation system on which the Shares are listed or traded, and the Shares are covered by an effective registration statement or applicable
exemption from registration. In addition to the terms and conditions provided herein, the Administrator may require that a Participant make such reasonable covenants, agreements, and representations as the Administrator, in its discretion, deems
advisable in order to comply with any such laws, regulations, or requirements. 
 (b) All certificates for Shares delivered pursuant to the
Plan and all Shares issued pursuant to book entry procedures are subject to any stop-transfer orders and other restrictions as the Administrator deems necessary or advisable to comply with U.S.
and non-U.S. federal, provincial, state or local securities or other laws, rules and regulations and the rules of any securities exchange or automated quotation system on which the Shares are listed,
quoted, or traded. The Administrator may place legends on any certificate or book entry evidencing Shares to reference restrictions applicable to the Shares. 

 (c) The Administrator shall have the right to require any Participant to comply with any
timing or other restrictions with respect to the settlement, distribution or exercise of any Option, including a window-period limitation, as may be imposed in the sole discretion of the Administrator. 

(d) Notwithstanding any other provision of the Plan, unless otherwise determined by the Administrator or required by any applicable law, rule
or regulation, the Company may, in lieu of delivering to any Participant certificates evidencing Shares issued in connection with any Option, record the issuance of Shares in the books of the Company (or, as applicable, its transfer agent or share
plan administrator). 
 If, pursuant to this Section 7.14, the Administrator determines that Shares will not be issued to any Participant, the Company
is relieved from liability to any Participant except to refund to the Participant such Participant’s Plan Account balance, without interest thereon (except as may be required by applicable local laws). 

7.15 Equal Rights and Privileges. All Eligible Employees granted Options pursuant to an Offering under the
Section 423 Component shall have equal rights and privileges under the Plan to the extent required under Section 423 of the Code so that the Section 423 Component qualifies as an “employee stock purchase plan” within the
meaning of Section 423 of the Code. Any provision of the Section 423 Component that is inconsistent with Section 423 of the Code shall, without further act or amendment by the Company or the Board, be reformed to comply with the equal
rights and privileges requirement of Section 423 of the Code. Eligible Employees participating in the Non-Section 423 Component need not have the same rights and privileges as each other, or as
Eligible Employees participating in the Section 423 Component. 
 7.16 Rules Particular to Specific Countries.
Notwithstanding anything herein to the contrary, the terms and conditions of the Plan with respect to Participants who are tax residents of a particular non-U.S. country or who are non-U.S. nationals or employed in non-U.S. jurisdictions may be subject to an addendum to the Plan in the form of an appendix or sub-plan (which appendix or sub-plan may be designed to govern Offerings under the Section 423 Component or
the Non-Section 423 Component, as determined by the Administrator). To the extent that the terms and conditions set forth in an appendix
or sub-plan conflict with any provisions of the Plan, the provisions of the appendix or sub-plan shall govern. The adoption of any such appendix or sub-plan shall be pursuant to Section 7.1 above. Without limiting the foregoing, the Administrator is specifically authorized to adopt rules and procedures, with respect to Participants who are non-U.S. nationals or employed in non-U.S. jurisdictions, regarding the exclusion of particular Affiliates or Subsidiaries from participation in the
Plan, eligibility to participate, the definition of Compensation, handling of payroll deductions or other contributions by Participants, payment of interest, conversion of local currency, data privacy security, payroll tax, withholding procedures,
establishment of bank or trust accounts to hold payroll deductions or contributions, provided that the adoption and implementation of any such rules and/or procedures would not cause the Section 423 Component to be in noncompliance with
Section 423 of the Code. 

 7.17 Section 409A. The Section 423 Component of the Plan and the
Options granted pursuant to Offerings thereunder are intended to be exempt from the application of Section 409A. Neither the Non-Section 423 Component nor any Option granted pursuant to an
Offering thereunder is intended to constitute or provide for “nonqualified deferred compensation” within the meaning of Section 409A. Notwithstanding any provision of the Plan to the contrary, if the Administrator determines that any
Option granted under the Plan may be or become subject to Section 409A or that any provision of the Plan may cause an Option granted under the Plan to be or become subject to Section 409A, the Administrator may adopt such amendments to the
Plan and/or adopt other policies and procedures (including amendments, policies and procedures with retroactive effect), or take any other actions as the Administrator determines are necessary or appropriate to avoid the imposition of taxes under
Section 409A, either through compliance with the requirements of Section 409A or through an available exemption therefrom. 
 * * *
* *

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00329-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00329-of-00352.parquet"}]]