Underwriting Agreement, dated May

The stockholder named in Schedule I hereto (the “Selling Stockholder”) of Klaviyo, Inc., a Delaware corporation (the “Company”), proposes, subject to the terms and conditions stated in this agreement (this “Agreement”), to sell to the Underwriters named in Schedule II hereto (the “Underwriters”), for which Goldman Sachs & Co. LLC and Morgan Stanley & Co. LLC are acting as representatives (the “Representatives”), an aggregate of 10,969,078 shares (the “Shares”) of Series A common stock, par value $0.001 per share (“Stock”), of the Company.

In connection with the offering of the Shares and the transactions contemplated by this Agreement, the Selling Stockholder will convert 10,969,078 shares of Series B Common Stock, par value $0.001 per share, of the Company for shares of Stock on a one-for-one basis.

(1)    (a) The Company represents and warrants to, and agrees with, each of the Underwriters that:

(i)    An “automatic shelf registration statement” as defined under Rule 405 under the Securities Act of 1933, as amended (the “Act”), on Form S-3 (File No. 333-285069) in respect of the Shares has been filed with the Securities and Exchange Commission (the “Commission”) not earlier than three years prior to the date hereof; such registration statement, and any post-effective amendment thereto, became effective on filing; and no stop order suspending the effectiveness of such registration statement or any part thereof has been issued and no proceeding for that purpose has been initiated or, to the knowledge of the Company, threatened by the Commission, and no notice of objection of the Commission to the use of such registration statement or any post-effective amendment thereto pursuant to Rule 401(g)(2) under the Act has been received by the Company (the base prospectus filed as part of such registration statement, in the form in which it has most recently been filed with the Commission on or prior to the date of this Agreement, is hereinafter called the “Basic Prospectus”; any preliminary prospectus (including any preliminary prospectus supplement) relating to the Shares filed with

the Commission pursuant to Rule 424(b) under the Act is hereinafter called a “Preliminary Prospectus”; the various parts of such registration statement, including all exhibits thereto and including any prospectus supplement relating to the Shares that is filed with the Commission and deemed by virtue of Rule 430B under the Act to be part of such registration statement, each as amended at the time such part of the registration statement became effective, are hereinafter collectively called the “Registration Statement”; the Basic Prospectus, as amended and supplemented immediately prior to the Applicable Time (as defined in Section 1(a)(iii) hereof), is hereinafter called the “Pricing Prospectus”; the form of the final prospectus relating to the Shares filed with the Commission pursuant to Rule 424(b) under the Act in accordance with Section 5(a) hereof is hereinafter called the “Prospectus”; any reference herein to the Basic Prospectus, the Pricing Prospectus, any Preliminary Prospectus or the Prospectus shall be deemed to refer to and include the documents incorporated by reference therein pursuant to Item 12 of Form S-3 under the Act, as of the date of such prospectus; any reference to any amendment or supplement to the Basic Prospectus, any Preliminary Prospectus or the Prospectus shall be deemed to refer to and include any post-effective amendment to the Registration Statement, any prospectus supplement relating to the Shares filed with the Commission pursuant to Rule 424(b) under the Act and any documents filed under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and incorporated therein, in each case after the date of the Basic Prospectus, such Preliminary Prospectus, or the Prospectus, as the case may be; any reference to any amendment to the Registration Statement shall be deemed to refer to and include any annual report of the Company filed pursuant to Section 13(a) or 15(d) of the Exchange Act after the effective date of the Registration Statement that is incorporated by reference in the Registration Statement; any oral or written communication with potential investors undertaken in reliance on Rule 163B under the Act is hereinafter called a “Testing-the-Waters Communication”; and any Testing-the-Waters Communication that is a written communication within the meaning of Rule 405 under the Act is hereinafter called a “Written Testing-the-Waters Communication”; and any “issuer free writing prospectus” as defined in Rule 433 under the Act relating to the Shares is hereinafter called an “Issuer Free Writing Prospectus”);

(ii)    (A) No order preventing or suspending the use of any Preliminary Prospectus or any Issuer Free Writing Prospectus has been issued by the Commission, and (B) each Preliminary Prospectus, at the time of filing thereof, conformed in all material respects to the applicable requirements of the Act and the rules and regulations of the Commission thereunder, and did not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with the Underwriter Information (as defined in Section 9(c) of this Agreement) and Selling Stockholder Information (as defined in Section 1(b)(vi) of this Agreement), as applicable;

(iii)    For the purposes of this Agreement, the “Applicable Time” is 5:45 p.m. (Eastern time) on the date of this Agreement. The Pricing Prospectus, as supplemented by the information listed on Schedule III(c) hereto, taken together (collectively, the “Pricing Disclosure Package”), as of the Applicable Time, did not, and as of the Time of Delivery (as

defined in Section 4(a) of this Agreement) will not, include any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; and each Issuer Free Writing Prospectus and each Written Testing-the-Waters Communication does not conflict with the information contained in the Registration Statement, the Pricing Prospectus or the Prospectus and each Issuer Free Writing Prospectus and each Written Testing-the-Waters Communication, as supplemented by and taken together with the Pricing Disclosure Package, as of the Applicable Time, did not, and as of the Time of Delivery will not, include any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided, however, that this representation and warranty shall not apply to statements or omissions made in reliance upon and in conformity with the Underwriter Information and Selling Stockholder Information, as applicable;

(iv)    The documents incorporated by reference in the Pricing Prospectus and the Prospectus, when they became effective or were filed with the Commission, as the case may be, conformed in all material respects to the requirements of the Act or the Exchange Act, as applicable, and the rules and regulations of the Commission thereunder, and none of such documents contained an untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary to make the statements therein not misleading; any further documents so filed and incorporated by reference in the Pricing Prospectus and the Prospectus or any further amendment or supplement thereto, when such documents become effective or are filed with the Commission, as the case may be, will conform in all material respects to the requirements of the Act or the Exchange Act, as applicable, and the rules and regulations of the Commission thereunder and will not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with the Underwriter Information and Selling Stockholder Information, as applicable; and no such documents were filed with the Commission since the Commission’s close of business on the business day immediately prior to the date of this Agreement and prior to the execution of this Agreement, except as set forth on Schedule III(c) hereto;

(v)    The Registration Statement conforms, and the Prospectus and any further amendments or supplements to the Registration Statement and the Prospectus will conform, in all material respects to the applicable requirements of the Act and the rules and regulations of the Commission thereunder and do not and will not, as of the applicable effective date as to each part of the Registration Statement, as of the applicable filing date as to the Prospectus and any amendment or supplement thereto, and as of the Time of Delivery, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein (in the case of the Prospectus and any amendment or supplement thereto, in light of the circumstances under which they were made) or necessary to make the statements therein not misleading; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with the Underwriter Information and Selling Stockholder Information, as applicable;

(vi)    Neither the Company nor any of its subsidiaries has, since the date of the latest audited financial statements included or incorporated by reference in the Pricing Prospectus, (A) sustained any material loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree or (B) entered into any transaction or agreement (whether or not in the ordinary course of business) that is material to the Company and its subsidiaries taken as a whole or incurred any liability or obligation, direct or contingent, that is material to the Company and its subsidiaries taken as a whole, in each case other than as set forth or contemplated in the Pricing Prospectus; and, since the respective dates as of which information is given in the Registration Statement and the Pricing Prospectus, there has not been (x) any change in the capital stock (other than as a result of (i) the exercise, vesting or settlement, if any, of stock options, restricted stock units, restricted stock or other compensatory equity-based awards or the award of stock options, restricted stock units, restricted stock or other compensatory equity-based awards in the ordinary course of business pursuant to the Company’s equity plans that are disclosed in the Pricing Prospectus and the Prospectus (including any “net” or “cashless” exercises or settlements), (ii) the exercise of warrants outstanding as of the date hereof, (iii) the repurchase of shares of capital stock upon termination of the holder’s employment or service with the Company pursuant to agreements providing for an option to repurchase or a right of first refusal on behalf of the Company or (iv) the issuance, if any, of stock upon exercise, settlement or conversion of Company securities as disclosed in the Pricing Prospectus and the Prospectus) or increase in long-term debt of the Company or any of its subsidiaries or (y) any Material Adverse Effect (as defined below); as used in this Agreement, “Material Adverse Effect” shall mean any material adverse change or effect, or any development involving a prospective material adverse change or effect, in or affecting (i) the business, properties, general affairs, management, financial position, stockholders’ equity or results of operations of the Company and its subsidiaries, taken as a whole, except as set forth or contemplated in the Pricing Prospectus and the Prospectus, or (ii) the ability of the Company to perform its obligations under this Agreement, or to consummate the transactions contemplated in the Pricing Prospectus and the Prospectus;

(vii)    The Company and its subsidiaries do not own any real property. The Company and its subsidiaries have good and marketable title in fee simple to all personal property owned by them (other than with respect to Company Intellectual Property (as defined below), which is addressed exclusively in subsection (xxv)), in each case free and clear of all liens, encumbrances and defects except such as do not materially affect the value of such property and do not materially interfere with the use made and proposed to be made of such property by the Company and its subsidiaries; and any real property and buildings held under lease by the Company and its subsidiaries are held by them under valid, subsisting and, to the Company’s knowledge, enforceable leases (subject to the effects of (A) bankruptcy, insolvency, fraudulent conveyance, fraudulent transfer, reorganization, moratorium or other similar laws relating to or affecting the rights or remedies of creditors generally; (B) the application of general principles of equity (including without limitation, concepts of materiality, reasonableness, good faith and fair dealing, regardless of whether enforcement is considered in proceedings at law or in equity); and (C) applicable law and public policy with respect to rights to indemnity and contribution) with such exceptions as are not material and do not materially interfere with the use

made and proposed to be made of such property and buildings by the Company and its subsidiaries;

(viii)    Each of the Company and each of its subsidiaries has been (A) duly organized and is validly existing and in good standing (to the extent such concept is applicable) under the laws of its jurisdiction of organization, with power and authority (corporate and other) to own its properties and conduct its business as described in the Pricing Prospectus, and (B) duly qualified as a foreign corporation for the transaction of business and is in good standing (to the extent such concept is applicable) under the laws of each other jurisdiction in which it owns or leases properties or conducts any business so as to require such qualification, except, in the case of this clause (B), where the failure to be so qualified or in good standing would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect, and each subsidiary of the Company has been listed in the Registration Statement;

(ix)    The Company has an authorized capitalization as set forth in the Pricing Prospectus and all of the issued and outstanding shares of capital stock of the Company, including the Shares to be sold by the Selling Stockholder, have been duly authorized and validly issued and are fully paid and non-assessable and conform in all material respects to the description of the Stock contained in the Pricing Disclosure Package and the Prospectus; and all of the issued and outstanding shares of capital stock of each subsidiary of the Company have been duly authorized and validly issued, are fully paid and non-assessable and (except, in the case of any foreign subsidiary, for directors’ qualifying shares) are owned directly or indirectly by the Company, free and clear of all liens, encumbrances, equities or claims, except for such liens or encumbrances described in the Pricing Prospectus and the Prospectus;

(x)    The compliance by the Company with this Agreement and the consummation of the transactions contemplated in this Agreement and the Pricing Prospectus will not conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, (A) any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which the Company or any of its subsidiaries is a party or by which the Company or any of its subsidiaries is bound or to which any of the property or assets of the Company or any of its subsidiaries is subject, (B) the certificate of incorporation or by-laws (or other applicable organizational document) of the Company or any of its subsidiaries, or (C) any statute or any judgment, order, rule or regulation of any court or governmental agency or body having jurisdiction over the Company or any of its subsidiaries or any of their properties, except in the case of clauses (A) and (C) as would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect; and no consent, approval, authorization, order, registration or qualification of or with any such court or governmental agency or body is required for the sale of the Shares by the Selling Stockholder or the consummation by the Company of the transactions contemplated by this Agreement, except for the registration under the Act of the sale of the Shares, the approval by the Financial Industry Regulatory Authority, Inc. (“FINRA”) of the underwriting terms and arrangements, the approval for listing on the New York Stock Exchange (the “Exchange”), in each case, if applicable, and such consents, approvals, authorizations, orders, registrations or qualifications as have been obtained or as may be required

under state securities or Blue Sky laws, the rules and regulations of FINRA or the Exchange in connection with the purchase and distribution of the Shares by the Underwriters;

(xi)    Neither the Company nor any of its subsidiaries is (A) in violation of its certificate of incorporation or by-laws (or other applicable organizational document), (B) in violation of any statute or any judgment, order, rule or regulation of any court or governmental agency or body having jurisdiction over the Company or any of its subsidiaries or any of their properties, or (C) in default in the performance or observance of any obligation, agreement, covenant or condition contained in any indenture, mortgage, deed of trust, loan agreement, lease or other agreement or instrument to which it is a party or by which it or any of its properties may be bound, except, in the case of the foregoing clauses (B) and (C), for such defaults as would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect;

(xii)    The statements set forth in the Pricing Prospectus and Prospectus under the caption “Description of Capital Stock”, insofar as they purport to constitute a summary of the terms of the Company’s capital stock, under the caption “Material U.S. Federal Tax Considerations for Non-U.S. Holders of Our Series A Common Stock” and under the caption “Underwriting”, insofar as they purport to describe the provisions of the laws and documents referred to therein, are accurate, complete and fair in all material respects;

(xiii)    Other than as set forth in the Pricing Prospectus, there are no legal, governmental or regulatory investigations, actions, demands, claims, suits, arbitrations, inquiries or proceedings (“Actions”) pending to which the Company or any of its subsidiaries or, to the Company’s knowledge, any officer or director of the Company is a party or of which any property of the Company or any of its subsidiaries or, to the Company’s knowledge, any officer or director of the Company, is the subject which, if determined adversely to the Company or any of its subsidiaries (or such officer or director), would individually or in the aggregate, reasonably be expected to have a Material Adverse Effect; and, to the Company’s knowledge, no such proceedings are threatened or contemplated by governmental authorities or others; there are no current or pending Actions that are required under the Act to be described in the Registration Statement or the Pricing Prospectus that are not so described therein; and there are no statutes, regulations or contracts or other documents that are required under the Act to be filed as exhibits to the Registration Statement or described in the Registration Statement, the Pricing Prospectus that are not so filed as exhibits to the Registration Statement or described in the Registration Statement and the Pricing Prospectus;

(xiv)    The Company is not an “investment company”, as such term is defined in the Investment Company Act of 1940, as amended;

(xv)    (A) At the time of filing the Registration Statement, (ii) at the time of the most recent amendment thereto for the purposes of complying with Section 10(a)(3) of the Act (whether such amendment was by post-effective amendment, incorporated report filed pursuant to Section 13 or 15(d) of the Exchange Act or form of prospectus), and (iii) at the time the Company or any person acting on its behalf (within the meaning, for this clause only, of Rule 163(c) under the Act) made any offer relating to the Shares in reliance on the exemption of Rule 163 under the Act, the Company was a “well-known seasoned issuer” as defined in Rule 405

under the Act; and (B) at the time of filing the Registration Statement and any post-effective amendment thereto, at the earliest time thereafter that the Company or any offering participant made a bona fide offer (within the meaning of Rule 164(h)(2) under the Act) of the Shares, and at the date hereof, the Company was not, and the Company is not, and as of the Time of Delivery will not be, an “ineligible issuer”, as defined in Rule 405 under the Act;

(xvi)    Deloitte & Touche LLP, who has certified certain financial statements of the Company and its subsidiaries, is an independent public accounting firm as required by the Act and the rules and regulations of the Commission thereunder;

(xvii)    The Company maintains a system of internal control over financial reporting (as such term is defined in Rule 13a-15(f) under the Exchange Act) that complies with the requirements of the Exchange Act applicable to the Company and has been designed by the Company’s principal executive officer and principal financial officer, or under their supervision, to (A) provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with U.S. generally accepted accounting principles (“GAAP”) and (B) is designed to provide reasonable assurance that (i) transactions are executed in accordance with management’s general or specific authorization, (ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with GAAP and to maintain accountability for assets, (iii) access to assets is permitted only in accordance with management’s general or specific authorization, (iv) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences and (v) the interactive data in eXtensible Business Reporting Language included or incorporated by reference in the Pricing Prospectus is accurate. The Company is not aware of any material weaknesses in its internal control over financial reporting (it being understood that this subsection shall not require the Company to comply with Section 404 of the Sarbanes-Oxley Act of 2002, as amended, and the rules and regulations promulgated in connection therewith (the “Sarbanes-Oxley Act”) as of an earlier date than it would otherwise be required to so comply under applicable law);

(xviii)    Since the date of the latest audited financial statements included or incorporated by reference in the Pricing Prospectus, there has been no change in the Company’s internal control over financial reporting that has materially and adversely affected, or is reasonably likely to materially and adversely affect, the Company’s internal control over financial reporting;

(xix)    The Company maintains disclosure controls and procedures (as such term is defined in Rule 13a-15(e) under the Exchange Act) that are designed to comply with the requirements of the Exchange Act applicable to the Company; and such disclosure controls and procedures have been designed to ensure that material information relating to the Company and its subsidiaries is made known to the Company’s principal executive officer and principal financial officer by others within those entities; and such disclosure controls and procedures are effective;

(xx)    The Company has all requisite company power and authority to execute and deliver this Agreement, and to perform all obligations to be performed by it hereunder. This Agreement has been duly authorized, executed and delivered by the Company;

(xxi)    Neither the Company nor any of its subsidiaries, nor any director or officer of the Company or any of its subsidiaries nor, to the knowledge of the Company, any employee, agent, controlled affiliate or other person acting on behalf of the Company or any of its subsidiaries has (A) made, offered, promised or authorized any unlawful contribution, gift, entertainment or other unlawful expense (or taken any act in furtherance thereof); (B) made, offered, promised or authorized any direct or indirect unlawful payment; or (C) violated or is in violation of any provision of the U.S. Foreign Corrupt Practices Act of 1977, as amended, or the rules and regulations thereunder, the Bribery Act 2010 of the United Kingdom or any other applicable anti-corruption, anti-bribery or related law, statute or regulation (collectively, “Anti-Corruption Laws”); the Company and its subsidiaries have conducted their businesses in compliance with Anti-Corruption Laws and have instituted and maintained and will continue to maintain policies and procedures reasonably designed to promote and achieve compliance with such laws and with the representations and warranties contained herein;

(xxii)    The operations of the Company and its subsidiaries are and have been conducted at all times in compliance with the requirements of applicable anti-money laundering laws, including, but not limited to, the Bank Secrecy Act of 1970, as amended by the USA PATRIOT ACT of 2001, and the rules and regulations promulgated thereunder, and the applicable anti-money laundering laws of the various jurisdictions in which the Company and its subsidiaries conduct business, the rules and regulations thereunder and any related or similar rules, regulation or guidelines issued, administered or enforced by any governmental agency (collectively, the “Money Laundering Laws”) and no action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving the Company or any of its subsidiaries with respect to the Money Laundering Laws is pending or, to the knowledge of the Company, threatened;

(xxiii)    Neither the Company nor any of its subsidiaries, nor any director or officer of the Company or any of its subsidiaries nor, to the knowledge of the Company, any employee, agent, controlled affiliate or other person acting on behalf of the Company or any of its subsidiaries is (A) currently the subject or the target of any sanctions administered or enforced by the U.S. Government, including, without limitation, the Office of Foreign Assets Control of the U.S. Department of the Treasury, or the U.S. Department of State and including, without limitation, the designation as a “specially designated national” or “blocked person,” the European Union, H.M. Treasury, the United Nations Security Council, the Swiss Secretariat of Economic Affairs, the Hong Kong Monetary Authority, the Monetary Authority of Singapore or other relevant sanctions authority (collectively, “Sanctions”), or (B) located, organized, or resident in a country or territory that is the subject or target of Sanctions (currently, so-called Donetsk People’s Republic, or so-called Luhansk People’s Republic or any other Covered Region of Ukraine identified pursuant to Executive Order 14065, and the Crimea region, Cuba, Iran, North Korea and Syria) (a “Sanctioned Jurisdiction”); and neither the Company nor any of its subsidiaries is engaged in, or has, since April 24, 2019, knowingly engaged in, any dealings

or transactions with or involving any individual or entity that was or is, as applicable, at the time of such dealing or transaction, the subject or target of Sanctions or with any Sanctioned Jurisdiction; the Company and its subsidiaries have instituted, and maintain, policies and procedures designed to promote and achieve continued compliance with Sanctions;

(xxiv)    The financial statements included or incorporated by reference in the Registration Statement, the Pricing Prospectus and the Prospectus, together with the related schedules and notes, present fairly in all material respects the financial position of the Company and its subsidiaries at the dates indicated and the statement of operations, stockholders’ equity and cash flows of the Company and its subsidiaries for the periods specified; said financial statements have been prepared in conformity with GAAP applied on a consistent basis throughout the periods involved. Except as included or incorporated by reference therein, no historical or pro forma financial statements or supporting schedules are required to be included in the Registration Statement, the Pricing Prospectus or the Prospectus under the Act or the rules and regulations promulgated thereunder. All disclosures contained in the Registration Statement, the Pricing Prospectus and the Prospectus regarding “non-GAAP financial measures” (as such term is defined by the rules and regulations of the Commission) comply in all material respects with Regulation G of the Exchange Act and Item 10 of Regulation S-K of the Act, to the extent applicable;

(xxv)    Except as would not reasonably be expected, individually or in the aggregate, to have a Material Adverse Effect, to the Company’s knowledge, the Company and its subsidiaries solely and exclusively own or have sufficient rights to use all patents, patent rights, licenses, inventions, copyrights and know-how (including trade secrets and other unpatented and/or unpatentable proprietary or confidential information, systems or procedures), proprietary processes, algorithms, models and methods, trademarks, service marks, trade names, domain names, logos, data and databases, and other intellectual property rights (collectively, “Intellectual Property”) necessary to carry on their respective businesses as now conducted or as set forth in the Pricing Prospectus. Except as would not reasonably be expected, individually or in the aggregate, to have a Material Adverse Effect, (A) neither the Company nor any of its subsidiaries has received any currently pending or threatened written notice or claim of any infringement, misappropriation or other violation of, or conflict with, asserted rights of others with respect to any Intellectual Property, and (B) there is no action, suit, proceeding or claim pending, or to the Company’s knowledge, threatened in writing by any party challenging the validity, scope, enforceability or ownership of any Intellectual Property owned, or purported to be owned, by the Company or its subsidiaries (the “Company Intellectual Property”). Except as would not reasonably be expected, individually or in the aggregate, to have a Material Adverse Effect, there is no infringement, misappropriation or other violation by third parties of any Company Intellectual Property that the Company is presently aware of. The Company and its subsidiaries have taken reasonable steps to maintain the confidentiality of all material trade secrets and other confidential information owned, or purported to be owned, by the Company or any of its subsidiaries. Except as would not reasonably be expected, individually or in the aggregate, to have a Material Adverse Effect, the Company and its subsidiaries have used all software and other materials distributed under a “free,” “open source,” or similar licensing model (including, but not limited to, the GNU General Public License, GNU Lesser General Public

License and GNU Affero General Public License) (“Open Source Materials”) in compliance with all license terms applicable to such Open Source Materials. Except as would not reasonably be expected, individually or in the aggregate, to have a Material Adverse Effect, none of the material proprietary software owned or purported to be owned by the Company or any of its subsidiaries (such software, “Company Proprietary Software”) incorporates or uses Open Source Materials in a manner that requires or has required any Company Proprietary Software to be disclosed or distributed in source code form, or licensed for the purpose of making derivative works, or imposes restrictions on the consideration to be charged for the distribution thereof (including requiring any Company Proprietary Software to be redistributed at no charge or minimal charge);

(xxvi)    The Company and its subsidiaries have implemented and maintained, and there have been no material violations of, a written information security and data privacy program, which includes controls, policies, procedures, safeguards and other measures designed to maintain and protect the integrity and security of Company Data (as defined below) and the condition, integrity, operation, redundancy and security of all IT Systems (as defined below) (collectively, “Privacy Measures”). The Privacy Measures comply in all material respects with all applicable Privacy Legal Obligations (as defined below), and the Company and its subsidiaries take commercially reasonable steps to comply with such policies and procedures. The Company and its subsidiaries’ information technology assets and equipment, computers, systems, networks, hardware, software, websites, applications, and databases (collectively, “IT Systems”) are adequate for, and operate and perform as required in connection with, the operation of the business of the Company and its subsidiaries as currently conducted, and, to the Company’s knowledge, are free and clear of all bugs, errors, defects, Trojan horses, time bombs, malware and other corruptants, except as would not reasonably be expected, individually or in the aggregate, to have a Material Adverse Effect. Except as disclosed in the Registration Statement, the Pricing Prospectus and the Prospectus, to the Company’s knowledge, except as would not reasonably be expected, individually or in the aggregate, to have a Material Adverse Effect, there have been no actual breaches, violations, outages, losses of access to or unauthorized uses of or accesses to Personal Data or IT Systems, nor any incidents under internal review or investigations relating to the same that have resulted in any legal obligation on the Company to notify any data subject or Governmental authority. Excepting any area of noncompliance that would not reasonably be expected, individually or in the aggregate, to have a Material Adverse Effect, the Company and its subsidiaries have at all times since January 1, 2019 been and are presently in compliance in all material respects with all applicable laws or statutes and all judgments, orders, rules and regulations of any court or arbitrator or governmental or regulatory authority, internal policies and binding contractual obligations relating to the receipt, collection, acquisition, access, handling, sharing, transfer, usage, sale, disclosure, interception, security, storage, reuse, redisclosure, deletion, destruction, disposal, modification, or any other processing of all Personal Data in the Company’s custody or control (“Privacy Legal Obligations”). The Company holds a cybersecurity insurance policy reasonably calculated to cover any potential lawsuits or other claims arising out of damages relating to Privacy Legal Obligations or any other privacy obligation, and the Company has not submitted a material claim for coverage from its insurance provider under such policy. “Personal Data” shall mean all data relating to or reasonably capable of being associated with an identified or

identifiable natural person, device, or household under all Privacy Legal Obligations, including, without limitation, IP addresses, mobile device identifiers, geolocation information and website usage activity data that is maintained or controlled by or on behalf of the Company and its subsidiaries. “Company Data” shall mean all confidential data, information and data compilations contained in the IT Systems or any databases of the Company, including Personal Data, that are used by or necessary to the business of the Company;

(xxvii)    No forward-looking statement (within the meaning of Section 27A of the Act and Section 21E of the Exchange Act) included or incorporated by reference in any of the Registration Statement, the Pricing Prospectus or the Prospectus has been made or reaffirmed without a reasonable basis or has been disclosed other than in good faith;

(xxviii)    The statistical, industry-related and market-related data included or incorporated by reference in the Registration Statement, the Pricing Disclosure Package and the Prospectus is based on or derived from sources that the Company believes, after reasonable inquiry, are reliable and accurate in all material respects and, to the extent required, the Company has obtained the written consent to the use of such data from such sources where applicable;

(xxix)    There is and has been no failure on the part of the Company or any of the Company’s directors or officers, in their capacities as such, to comply with any provision of the Sarbanes-Oxley Act, including Section 402 related to loans and Sections 302 and 906 related to certifications;

(xxx)    Neither the Company nor any of its controlled affiliates has (A) taken or will take, directly or indirectly, any action designed to or that could reasonably be expected to cause or result in the stabilization or manipulation of the price of any security of the Company or any of its subsidiaries in connection with the offering of the Shares, (B) sold, bid for, purchased, or paid anyone any compensation for soliciting purchases of, the Shares, or (C) paid or agreed to pay to any person any compensation for soliciting another to purchase any other securities of the Company or any subsidiaries other than as contemplated in this Agreement; provided, however, that the Company makes no such representation with respect to any action taken by any Underwriter or its affiliates;

(xxxi)    No material labor dispute with the employees of the Company or any of its subsidiaries exists or, to the knowledge of the Company, is imminent;

(xxxii)    Except as would not reasonably be expected, individually or in the aggregate, to have a Material Adverse Effect, the Company and its subsidiaries have insurance covering their respective properties, operations, personnel and businesses, including business interruption insurance, in such amounts and insured against such losses and risks as are adequate to protect the Company and its subsidiaries and their respective businesses; and neither the Company nor any of its subsidiaries has any reason to believe that it will not be able to renew its existing insurance coverage as and when such coverage expires or to obtain similar coverage at reasonable cost from similar insurers as may be necessary to continue its business;

(xxxiii)     Except as would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect, neither the Company nor any of its subsidiaries: (A) is in violation of any applicable statute, law, rule, regulation, ordinance, code, rule of common law or order of or with any governmental agency or body or any court, domestic or foreign, relating to the use, management, disposal or release of hazardous or toxic substances or wastes or relating to pollution or the protection of the environment or human health or relating to exposure to hazardous or toxic substances or wastes (collectively, “Environmental Laws”); (B) has received any written claim, written request for information or written notice of liability or investigation arising under, relating to or based upon any Environmental Laws; (C) is aware of any pending or threatened notice, claim, proceeding or investigation which might lead to liability under Environmental Laws; (D) anticipates incurring capital expenditures relating to compliance with Environmental Laws (including, without limitation, any capital or operating expenditures required for clean-up, investigation or closure of properties or compliance with Environmental Laws or any permit, license, approval, any related constraints on operating activities and any potential liabilities to third parties); and (E) has been named as a “potentially responsible party” under the Comprehensive Environmental Response, Compensation, and Liability Act of 1980, as amended;

(xxxiv)    (A) Each employee benefit plan, within the meaning of Section 3(3) of the Employee Retirement Income Security Act of 1974, as amended (“ERISA”), for which the Company or any member of its “Controlled Group” (defined as any entity, whether or not incorporated, that is under common control with the Company within the meaning of Section 4001(a)(14) of ERISA or any entity that would be regarded as a single employer with the Company under Section 414(b), (c), (m) or (o) of the Internal Revenue Code of 1986, as amended (the “Code”)) would have any liability (each, a “Plan”) has been maintained in compliance in all material respects with its terms and the requirements of any applicable statutes, orders, rules and regulations, including but not limited to ERISA and the Code; (B) no prohibited transaction, within the meaning of Section 406 of ERISA or Section 4975 of the Code, has occurred with respect to any Plan, excluding transactions effected pursuant to a statutory or administrative exemption; (C) no Plan is subject to Section 412 of the Code or Section 302 or Title IV of ERISA; (D) neither the Company nor any member of the Controlled Group has incurred, nor expects to incur, any liability under Title IV of ERISA in respect of a Plan; (E) each Plan that is intended to be qualified under Section 401(a) of the Code is so qualified, and nothing has occurred, whether by action or by failure to act, which would cause the loss of such qualification; (F) there is no pending audit or investigation by any governmental agency or any non-U.S. regulatory agency with respect to any Plan; (G) there has not occurred or is likely to occur a material increase in the aggregate amount of contributions required to be made to all Plans by the Company or its Controlled Group affiliates in the current fiscal year of the Company and its Controlled Group affiliates compared to the amount of such contributions made in the Company’s and its Controlled Group affiliates’ most recently completed fiscal year; and (H) neither the Company nor any of its subsidiaries has or has had any “accumulated post-retirement benefit obligations” (within the meaning of Statement of Financial Accounting Standards 106) with respect to any Plan, except in each case with respect to the events or conditions set forth in (A) through (H) hereof, as would not, individually or in the aggregate, have a Material Adverse Effect;

(xxxv)    Except as would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect, the Company and its subsidiaries possess and are in compliance with all licenses, permits, certificates and other authorizations from, and have made all declarations and filings with, all governmental authorities, required or necessary to own or lease, as the case may be, and to operate their respective properties and to carry on their respective businesses in the manner described in the Registration Statement;

(xxxvi)    The Company and each of its subsidiaries have timely filed all federal, state, local and foreign income and franchise tax returns required to be filed through the date hereof, subject to permitted extensions, and have paid all taxes shown thereon or otherwise assessed which are due and payable (in each case except for cases in which the failure to file or pay would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect). Except as would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect, no tax deficiency has been determined adversely to the Company or any of its subsidiaries, and the Company has not received any written notice from any taxing authorities asserting any tax deficiency against the Company and its subsidiaries or any of their respective properties or assets. The charges, accruals and reserves on the books of the Company and its subsidiaries in respect of any tax liability for any years not finally determined are adequate to meet any assessments or re-assessments for additional tax for any years not finally determined, except to the extent of any inadequacy that would not, individually or in the aggregate, reasonably be expected to result in a Material Adverse Effect;

(xxxvii)    Except as disclosed in the Registration Statement, the Pricing Prospectus and the Prospectus: (A) there are no persons with registration rights or other similar rights to have any securities registered pursuant to the Registration Statement or otherwise registered by the Company under the Act except as have been validly waived or complied with; and (B) the holders of outstanding shares of the Company’s capital stock are not entitled to preemptive or other rights to subscribe for the Shares that have not been complied with or otherwise effectively waived;

(xxxviii)    There are no contracts, agreements or understandings between the Company and any person that would give rise to a valid claim against the Company or any Underwriter for a brokerage commission, finder’s fee or other similar payment in connection with this offering;

(xxxix)    There are no debt securities issued or guaranteed by the Company or any of its subsidiaries that are rated by a “nationally recognized statistical rating organization,” as that term is defined by in Section 3(a)(62) of the Exchange Act;

(xl)    The Company and its subsidiaries have no off-balance sheet arrangements (as defined in Regulation S-K Item 303(a)(4)(ii)) that would reasonably be expected to have a material current or future effect on the Company’s financial condition, changes in financial condition, results of operations, liquidity, capital expenditures or capital resources, except as disclosed in the Registration Statement, the Pricing Disclosure Package, the Pricing Prospectus and the Prospectus;

(xli)    The Company has not sold or issued any shares of Stock during the six-month period preceding the date of the Prospectus, including any sales pursuant to Rule 144A or Regulation D or S of the Securities Act, other than (i) shares issued pursuant to employee benefit plans, stock option plans or other employee compensation plans or pursuant to outstanding options, rights or warrants, or (ii) as disclosed in the Registration Statement, the Pricing Prospectus and the Prospectus.

(xlii)    The interactive data in eXtensible Business Reporting Language included or incorporated by reference in the Registration Statement fairly presents the information called for in all material respects and has been prepared in accordance with the Commission’s rules and guidelines applicable thereto; and

(xliii)    There are no relationships or related-party transactions involving the Company, any of the subsidiaries or consolidated affiliated entities or any other person required to be described in the Registration Statement, the Pricing Prospectus and the Prospectus which have not been described as required.

(b)    The Selling Stockholder represents and warrants to, and agrees with, each of the Underwriters and the Company that:

(i)    All consents, approvals, authorizations and orders necessary for the execution and delivery by the Selling Stockholder of this Agreement, and for the sale and delivery of the Shares to be sold by the Selling Stockholder hereunder, have been obtained (except for the registration under the Act of the Shares and such consents, approvals, authorizations, registrations, qualifications and orders as may be required under state securities or Blue Sky laws, the rules and regulations of FINRA, the approval for listing on the Exchange or such consents, approvals, authorizations, registrations, qualifications and orders that have been obtained or, if not obtained, would not individually or in the aggregate, affect the validity of the Shares to be sold by the Selling Stockholder or reasonably be expected to impair the ability of the Selling Stockholder to consummate the transactions contemplated by this Agreement); and the Selling Stockholder has full right, power and authority to enter into this Agreement, and to sell, assign, transfer and deliver the Shares to be sold by the Selling Stockholder hereunder;

(ii)    The sale of the Shares to be sold by the Selling Stockholder hereunder and the compliance by the Selling Stockholder with this Agreement and the consummation of the transactions contemplated herein will not (A) conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, any statute, indenture, mortgage, deed of trust, loan agreement, lease or other agreement or instrument to which the Selling Stockholder is a party or by which the Selling Stockholder is bound or to which any of the property or assets of the Selling Stockholder is subject, nor will such action (B) result in any violation of any statute or any judgment, order, rule or regulation of any court or governmental agency or body having jurisdiction over the Selling Stockholder or any property or assets of the Selling Stockholder, except, in the case of clauses (A) or (B), as would not, individually or in the aggregate, affect the validity of the Shares to be sold by the Selling Stockholder or reasonably be expected to impair the ability of the Selling Stockholder to consummate the transactions contemplated by this Agreement;

(iii)    The Selling Stockholder has, and immediately prior to the Time of Delivery the Selling Stockholder will have, good and valid title to, or a valid “security entitlement” within the meaning of Section 8-501 of the New York Uniform Commercial Code in respect of, the Shares to be sold by the Selling Stockholder hereunder at the Time of Delivery, free and clear of all liens, encumbrances, equities or claims; and, upon delivery of such Shares and payment therefor pursuant hereto, good and valid title to such Shares, free and clear of all liens, encumbrances, equities or claims, will pass to the several Underwriters;

(iv)    On or prior to the date of the Pricing Prospectus, the Selling Stockholder has executed and delivered to the Underwriters an agreement substantially in the form of Annex I hereto;

(v)    The Selling Stockholder has not taken and will not take, directly or indirectly, any action that is designed to or that has constituted or might reasonably be expected to cause or result in stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Shares;

(vi)    The Registration Statement and Preliminary Prospectus did not, and the Prospectus and any further amendments or supplements to the Registration Statement and the Prospectus will not, when they become effective or are filed with the Commission, as the case may be, contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein, in the case of the Registration Statement (and any amendments and supplements thereto) only, not misleading and, in the case of such other documents, not misleading in light of the circumstances under which such statements were made; provided, that the Selling Stockholder representation shall only apply to any untrue statement of a material fact or omission to state a material fact made in reliance upon and in conformity with any information relating to the Selling Stockholder furnished to the Company in writing by the Selling Stockholder expressly for use in such documents, it being understood and agreed that the only information furnished by the Selling Stockholder to the Company consists of (i) the legal name of the Selling Stockholder and (ii) the address and other information with respect to the Selling Stockholder (excluding percentages) which appears in the Pricing Disclosure Package and the Pricing Prospectus in the table (and corresponding footnote) under the caption “Selling Stockholder” (with respect to the Selling Stockholder, the “Selling Stockholder Information”);

(vii)    In order to document the Underwriters’ compliance with the reporting and withholding provisions of the Tax Equity and Fiscal Responsibility Act of 1982 with respect to the transactions herein contemplated, the Selling Stockholder will deliver to the Underwriters prior to or at the Time of Delivery a properly completed and executed United States Treasury Department Form W-9 (or other applicable form or statement specified by Treasury Department regulations in lieu thereof);

(viii)    [Reserved]; and

(ix)    The Selling Stockholder will not directly or indirectly use the proceeds of the offering of the Shares hereunder, or lend, contribute or otherwise direct such proceeds to any

joint venture partner or other person or entity, (i) to fund or facilitate any activities of or business with any person, or in any country or territory, that, at the time of such funding, is the subject or the target of Sanctions, or in any other manner that will result in a violation by the Selling Stockholder of Sanctions, or (ii) in furtherance of an offer, payment, promise to pay, or authorization of the payment or giving of money, or anything else of value, to any person in violation of any applicable Money Laundering Laws or any Anti-Corruption Laws; provided, however, that the foregoing shall not apply with respect to the distribution of the proceeds of the offering to the Selling Stockholder’s direct or indirect limited partners once such proceeds are no longer under the control of the Selling Stockholder if prior to such distribution the Selling Stockholder has no knowledge that such proceeds will be used for any of the foregoing purposes.

(2)    Subject to the terms and conditions herein set forth, the Selling Stockholder agrees to sell to each of the Underwriters, and each of the Underwriters agrees, severally and not jointly, to purchase from the Selling Stockholder, at a purchase price per share of $32.895, the number of Shares (to be adjusted by the Underwriters so as to eliminate fractional shares) determined by multiplying the aggregate number of Shares to be sold by the Selling Stockholder as set forth opposite his name in Schedule I hereto by a fraction, the numerator of which is the aggregate number of Shares to be purchased by such Underwriter as set forth opposite the name of such Underwriter in Schedule II hereto and the denominator of which is the aggregate number of Shares to be purchased by all of the Underwriters from the Selling Stockholder hereunder.

(3)    Upon the authorization by you of the release of the Shares, the several Underwriters propose to offer the Shares for sale upon the terms and conditions set forth in the Pricing Disclosure Package and the Prospectus.

(4)    (a) The Shares to be purchased by each Underwriter hereunder, in definitive or book-entry form, and in such authorized denominations and registered in such names as the Underwriters may request upon at least twenty-four hours’ prior notice to the Company and the Selling Stockholder shall be delivered by or on behalf of the Selling Stockholder to the Underwriters, through the facilities of the Depository Trust Company (“DTC”), for the account of such Underwriter, against payment by or on behalf of such Underwriter of the purchase price therefor by wire transfer of federal (same-day) funds to the accounts specified by the Selling Stockholder to the Underwriters at least twenty-four hours in advance. The time and date of such delivery and payment shall be 9:00 a.m., New York City time, on May 16, 2025 or such other time and date as the Underwriters, the Selling Stockholder may agree upon in writing. Such time and date for delivery of the Shares is herein called the “Time of Delivery”.

(b)    The documents to be delivered at the Time of Delivery by or on behalf of the parties hereto pursuant to Section 8 hereof, including the cross receipt for the Shares, will be delivered at Sidley Austin LLP, 787 Seventh Avenue, New York, New York 10019 (the “Closing Location”), and the Shares will be delivered at the office of DTC or its designated custodian, all at the Time of Delivery. A virtual meeting will be held on the New York Business Day immediately preceding the Time of Delivery, at which meeting the final drafts of the documents to be delivered pursuant to the preceding sentence will be available for review by the parties hereto. For the purposes of this Agreement, “New York Business Day” shall mean each

Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on which banking institutions in New York City are generally authorized or obligated by law or executive order to close.

(5)    The Company agrees with each of the Underwriters:

(a)    To prepare the Prospectus in a form approved by you and to file such Prospectus pursuant to Rule 424(b) under the Act prior to the earlier of (i) the Time of Delivery and (ii) the Commission’s close of business on the second business day following the execution and delivery of this Agreement; to make no further amendment or any supplement to the Registration Statement, the Basic Prospectus or the Prospectus prior to the last Time of Delivery of which you disapprove promptly after reasonable notice thereof; to advise you, promptly after it receives notice thereof, of the time when any amendment to the Registration Statement has been filed or becomes effective or any amendment or supplement to the Prospectus has been filed and to furnish you with copies thereof; to file promptly all materials required to be filed by the Company with the Commission pursuant to Rule 433(d) under the Act; to file promptly all reports and any definitive proxy or information statements required to be filed by the Company with the Commission pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act subsequent to the date of the Prospectus and for so long as the delivery of a prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the Act) is required in connection with the offering or sale of the Shares to advise you, promptly after it receives notice thereof, of the issuance by the Commission of any stop order or of any order preventing or suspending the use of any Preliminary Prospectus or other prospectus in respect of the Shares, of the suspension of the qualification of the Shares for offering or sale in any jurisdiction, of the initiation or threatening of any proceeding for any such purpose against the Company, or of any request by the Commission for the amending or supplementing of the Registration Statement or the Prospectus or for additional information; and, in the event of the issuance of any stop order or of any order preventing or suspending the use of any Preliminary Prospectus or other prospectus relating to the Shares, of any notice of objection of the Commission to the use of the Registration Statement or any post-effective amendment thereto pursuant to Rule 401(g)(2) under the Act, or suspending any such qualification, to promptly use its reasonable best efforts to obtain the withdrawal of such order; and in the event of any such issuance of a notice of objection, promptly to take such steps including, without limitation, amending the Registration Statement or filing a new registration statement, at its own expense, as may be necessary to permit offers and sales of the Shares by the Underwriters (references herein to the Registration Statement shall include any such amendment or new registration statement);

(b)    If required by Rule 430B(h) under the Act, to prepare a form of prospectus in a form approved by you and to file such form of prospectus pursuant to Rule 424(b) under the Act not later than may be required by Rule 424(b) under the Act; and to make no further amendment or supplement to such form of prospectus which shall be disapproved by you promptly after reasonable notice thereof;

(c)    To promptly from time to time take such action as you may reasonably request to qualify the Shares for offering and sale under the securities laws of such jurisdictions as you may

reasonably request and to comply with such laws so as to permit the continuance of sales and dealings therein in such jurisdictions for as long as may be necessary to complete the distribution of the Shares, provided that in connection therewith the Company shall not be required to qualify as a foreign corporation (where not otherwise required) or to file a general consent to service of process in any jurisdiction (where not otherwise required) or subject itself to taxation for doing business in any jurisdiction in which it was not otherwise subject to taxation;

(d)    Prior to 10:00 a.m., New York City time, on the New York Business Day next succeeding the date of this Agreement and from time to time, to furnish the Underwriters with written and electronic copies of the Prospectus in New York City in such quantities as you may reasonably request, and, if the delivery of a prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the Act) is required at any time prior to the expiration of nine months after the time of issue of the Prospectus in connection with the offering or sale of the Shares and if at such time any event shall have occurred as a result of which the Prospectus as then amended or supplemented would include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made when such Prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the Act) is delivered, not misleading, or, if for any other reason it shall be necessary during such same period to amend or supplement the Prospectus or to file under the Exchange Act any document incorporated by reference in the Prospectus in order to comply with the Act or the Exchange Act, to notify you and upon your request to file such document and to prepare and furnish without charge to each Underwriter and to any dealer in securities (whose names and addresses the Underwriters shall furnish to the Company) as many written and electronic copies as you may from time to time reasonably request of an amended Prospectus or a supplement to the Prospectus which will correct such statement or omission or effect such compliance; and in case any Underwriter is required to deliver a prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the Act) in connection with sales of any of the Shares at any time nine months or more after the time of issue of the Prospectus, upon your request but at the expense of such Underwriter, to prepare and deliver to such Underwriter as many written and electronic copies as you may request of an amended or supplemented Prospectus complying with Section 10(a)(3) of the Act;

(e)    To make generally available to its securityholders as soon as practicable (which may be satisfied by filing its Annual Report on Form 10-K with the Commission’s EDGAR system), but in any event not later than sixteen months after the effective date of the Registration Statement (as defined in Rule 158(c) under the Act), an earnings statement of the Company and its subsidiaries (which need not be audited) complying with Section 11(a) of the Act and the rules and regulations of the Commission thereunder (including, at the option of the Company, Rule 158);

(f)    During the period beginning from the date hereof and continuing to and including the date that is ninety (90) days after the date of the Prospectus (the “Company Lock-Up Period”), not to (A) offer, sell, contract to sell, pledge, grant any option, right or warrant to purchase, make any short sale, or otherwise transfer or dispose of, directly or indirectly, or file with or confidentially submit to the Commission a registration statement under the Act relating

to, any securities of the Company that are substantially similar to the Shares, including but not limited to any options or warrants to purchase shares of Stock or any securities that are convertible into or exchangeable for, or that represent the right to receive, shares of Stock or any such substantially similar securities, or publicly disclose the intention to make any offer, sale, pledge, disposition or filing or (B) enter into any swap or other agreement that transfers, in whole or in part, any of the economic consequences of ownership of the Stock or any such other securities, whether any such transaction described in clause (A) or (B) above is to be settled by delivery of shares of Stock or such other securities, in cash or otherwise, other than (a) the Shares to be sold hereunder; (b) upon the conversion, exercise or exchange of convertible, exercisable or exchangeable securities outstanding as of, the date of this Agreement and described in the Pricing Prospectus and the Prospectus; (c) the issuance by the Company of shares of common stock with respect to stock options, stock awards, restricted stock, restricted stock units or other equity awards or upon the exercise, vesting or settlement thereof (including any “early”, “net” or “cashless” exercises or settlements), pursuant to the terms of equity plans described in the Pricing Prospectus and the Prospectus; (d) the sale or issuance of, or entry into an agreement providing for the sale or issuance of, common stock or securities convertible into, exercisable for or which are otherwise exchangeable for or represent the right to receive common stock, in connection with (x) the acquisition by the Company or any of its subsidiaries of the securities, business, technology, property or other assets of another person or entity or pursuant to an employee benefit plan assumed by the Company or a subsidiary in connection with such acquisition or (y) the Company’s joint ventures, commercial relationships and other strategic transactions, provided that the aggregate number of shares of common stock (or as-converted common stock in the case of securities convertible into common stock) that the Company may sell or issue or agree to sell or issue pursuant to this clause (d) shall not exceed 10% of the total number of shares of common stock outstanding immediately following the offering of the Shares contemplated by this Agreement; and (e) the filing of any registration statement on Form S-8 relating to securities granted or to be granted pursuant to the Company’s equity plans disclosed in the Pricing Prospectus and the Prospectus or any assumed employee benefit plan contemplated by clause (d); provided that in the case of clause (d), the Company shall cause each recipient of such securities to execute and deliver to the Representatives, on or prior to the issuance of such securities, a lock-up letter in substantially the form attached as Annex I hereto and the Company shall enter stop transfer instructions with the Company’s transfer agent and registrar on such securities;

(g)    During a period of three years from the effective date of the Registration Statement, so long as the Company is subject to the reporting requirements of either Section 13 or Section 15(d) of the Exchange Act, to furnish to its stockholders as soon as practicable after the end of each fiscal year an annual report (including a balance sheet and statements of income, stockholders’ equity and cash flows of the Company and its consolidated subsidiaries certified by independent public accountants) and, as soon as practicable after the end of each of the first three quarters of each fiscal year (beginning with the fiscal quarter ending after the effective date of the Registration Statement), to make available to its stockholders consolidated summary financial information of the Company and its subsidiaries for such quarter in reasonable detail; provided that no reports, documents or other information need to be furnished pursuant to this

Section 5(g) to the extent that they are available on EDGAR or the provision of which would require disclosure by the Company under Regulation FD;

(h)    During a period of three years from the effective date of the Registration Statement, and only so long as the Company is subject to the reporting requirements of either Section 13 or Section 15(d) of the Exchange Act, to furnish to you copies of all reports or other communications (financial or other) furnished to stockholders, and to deliver to you (i) as soon as they are available, copies of any reports and financial statements furnished to or filed with the Commission or any national securities exchange on which any class of securities of the Company is listed; and (ii) such additional information concerning the business and financial condition of the Company as you may from time to time reasonably request (such financial statements to be on a consolidated basis to the extent the accounts of the Company and its subsidiaries are consolidated in reports furnished to its stockholders generally or to the Commission); provided that no reports, documents or other information need to be furnished pursuant to this Section 5(h) to the extent that they are available on EDGAR;

(i)    To pay the required Commission filing fees relating to the Shares within the time required by Rule 456(b)(1) under the Act without regard to the proviso therein and otherwise in accordance with Rules 456(b) and 457(r) under the Act;

(j)    To use its reasonable best efforts to maintain the listing of Stock on the Exchange;

(k)    Upon request of any Underwriter, to furnish, or cause to be furnished, to such Underwriter an electronic version of the Company’s trademarks, service marks and corporate logo for use on the website, if any, operated by such Underwriter for the purpose of facilitating the on-line offering of the Shares (the “License”); provided, however, that the License shall be used solely for the purpose described above, is granted without any fee and may not be assigned or transferred; and

(l)    Not to, and to use its best efforts to ensure that no one acting on its behalf (other than any Underwriter), (i) take, directly or indirectly, any action which is designed to or which constitutes, or which would reasonably be expected to cause or result in, stabilization or manipulation of the price of any security of the Company or any of its subsidiaries to facilitate the sale or resale of the Shares, (ii) sell, bid for, purchase or pay anyone any compensation for soliciting purchases of the Shares or (iii) pay or agree to pay to any person any compensation or soliciting another to purchase any other securities of the Company or any subsidiaries.

(6)    (a) The Company represents and agrees that, without the prior consent of the Underwriters, it has not made and will not make any offer relating to the Shares that would constitute a “free writing prospectus” as defined in Rule 405 under the Act; the Selling Stockholder represents and agrees that, without the prior consent of the Company and the Underwriters, he has not made and will not make any offer relating to the Shares that would constitute a free writing prospectus; and each Underwriter represents and agrees that, without the prior consent of the Company and the other Underwriters, it has not made and will not make any offer relating to the Shares that would constitute a free writing prospectus required to be filed

with the Commission; any such free writing prospectus the use of which has been consented to by the Company and the Underwriters is listed on Schedule III(a) hereto;

(b)    The Company represents and agrees that (i) it has not engaged in, or authorized any other person to engage in, any Testing-the-Waters Communications,; and (ii) it has not distributed, or authorized any other person to distribute, any Written Testing-the-Waters Communications;

(c)    The Company has complied and will comply with the requirements of Rule 433 under the Act applicable to any Issuer Free Writing Prospectus, including timely filing with the Commission or retention where required and legending; and

(d)    The Company agrees that if at any time following issuance of an Issuer Free Writing Prospectus or Written Testing-the-Waters Communication prepared or authorized by it any event occurred or occurs as a result of which such Issuer Free Writing Prospectus or Written Testing-the-Waters Communication prepared or authorized by it would conflict with the information in the Registration Statement, the Pricing Prospectus or the Prospectus or would include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances then prevailing, not misleading, the Company will give prompt notice thereof to the Underwriters and, if requested by the Underwriters, will prepare and furnish without charge to each Underwriter an Issuer Free Writing Prospectus, Written Testing-the-Waters Communication prepared or authorized by it or other document which will correct such conflict, statement or omission.

(7)    The Company and the Selling Stockholder, severally and not jointly, covenant and agree with one another and with the several Underwriters that (a) the Company will pay or cause to be paid the following: (i) the fees, disbursements and expenses of the Company’s counsel and accountants in connection with the registration of the Shares under the Act and all other expenses incurred in connection with the preparation, printing, reproduction and filing of the Registration Statement, the Basic Prospectus, any Preliminary Prospectus, any Written Testing-the-Waters Communication, any Issuer Free Writing Prospectus and the Prospectus and amendments and supplements thereto and the mailing and delivering of copies thereof to the Underwriters and dealers; (ii) the cost of printing or producing any agreement among Underwriters, this Agreement, the Blue Sky Memorandum, and any other documents in connection with the offering, purchase, sale and delivery of the Shares; (iii) all expenses incurred in connection with the qualification of the Shares for offering and sale under state securities laws as provided in Section 5(c) hereof, including the reasonable and documented fees and disbursements of counsel for the Underwriters in connection with such qualification and in connection with the Blue Sky survey; and (iv) the filing fees incident to, and the reasonable and documented fees and disbursements of counsel for the Underwriters in connection with, any required review by FINRA of the terms of the sale of the Shares, which fees, together with any expenses incurred under clause (iii) of this Section 7, shall not exceed $15,000; and (b) the Company will pay or cause to be paid: (i) the cost of preparing and delivering stock certificates, including any share or other transfer taxes and any stamp or other duties payable upon the sale, issuance or delivery of the Shares to the Underwriters; (ii) the cost and charges of any transfer agent or registrar; and

(iii) all other costs and expenses incident to the performance of its obligations hereunder which are not otherwise specifically provided for in this Section 7. The Selling Stockholder will pay or cause to be paid all costs and expenses incident to the performance of the Selling Stockholder’s obligations hereunder in connection with all expenses and taxes incident to the sale and delivery of the Shares to be sold by the Selling Stockholder to the Underwriters hereunder, including any fees and expenses of counsel for the Selling Stockholder. It is understood, however, that the Company shall bear, and the Selling Stockholder shall not be required to pay or to reimburse the Company for, the cost of any other matters not directly relating to the sale and purchase of the Shares pursuant to this Agreement, and that, except as provided in this Section 7, and Sections 9 and 12 hereof, the Underwriters will pay all of their own costs and expenses, including the fees of their counsel, stock transfer taxes on resale of any of the Shares by them, and any advertising expenses connected with any offers they may make.

(8)    The obligations of the Underwriters hereunder, as to the Shares to be delivered at the Time of Delivery, shall be subject, in their discretion, to the condition that all representations and warranties and other statements of the Company and the Selling Stockholder herein are, at and as of the Applicable Time and the Time of Delivery, true and correct, the condition that the Company and the Selling Stockholder shall have performed all of its and their obligations hereunder theretofore to be performed, and the following additional conditions:

(a)    The Prospectus shall have been filed with the Commission pursuant to Rule 424(b) under the Act within the applicable time period prescribed for such filing by the rules and regulations under the Act and in accordance with Section 5(a) hereof; all material required to be filed by the Company pursuant to Rule 433(d) under the Act shall have been filed with the Commission within the applicable time period prescribed for such filing by Rule 433; no stop order suspending the effectiveness of the Registration Statement or any part thereof shall have been issued and no proceeding for that purpose shall have been initiated or threatened by the Commission; no stop order suspending or preventing the use of the Pricing Prospectus, Prospectus or any Issuer Free Writing Prospectus shall have been initiated or threatened by the Commission and no notice of objection of the Commission to the use of the Registration Statement or any post-effective amendment thereto pursuant to Rule 401(g)(2) under the Act shall have been received; and all requests for additional information on the part of the Commission shall have been complied with to your reasonable satisfaction;

(b)    Sidley Austin LLP, counsel for the Underwriters, shall have furnished to you their written opinion and negative assurance letter, dated the Time of Delivery, in form and substance satisfactory to you, and such counsel shall have received such papers and information as they may reasonably request to enable them to pass upon such matters;

(c)    Goodwin Procter LLP, counsel for the Company, shall have furnished to you their written opinion and negative assurance letter, dated the Time of Delivery, in form and substance satisfactory to you;

(d)    Goodwin Procter LLP, counsel for the Selling Stockholder, shall have furnished to you their written opinion with respect to the Selling Stockholder, dated the Time of Delivery, in form and substance satisfactory to you;

(e)    On the date of the Prospectus at a time prior to the execution of this Agreement, at 9:30 a.m., New York City time, on the effective date of any post-effective amendment to the Registration Statement filed subsequent to the date of this Agreement and also at the Time of Delivery, Deloitte & Touche LLP shall have furnished to you a letter or letters, dated the respective dates of delivery thereof, in form and substance satisfactory to you;

(f)    [Reserved];

(g)    (i) Neither the Company nor any of its subsidiaries shall have sustained since the date of the latest audited financial statements included or incorporated by reference in the Pricing Prospectus and the Prospectus any loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree, otherwise than as set forth or contemplated in the Pricing Prospectus and the Prospectus, and (ii) since the respective dates as of which information is given in the Pricing Prospectus and the Prospectus there shall not have been any change in the capital stock (other than as a result of (A) the grant, exercise, settlement or vesting (including any “net” or “cashless” exercises or settlements) of stock options, warrants, restricted stock or restricted stock units or other compensatory equity-based awards or the award of stock options, warrants, restricted stock, restricted stock units or other compensatory equity-based awards in the ordinary course of business, in each case pursuant to the Company’s equity plans that are described in the Pricing Prospectus and the Prospectus or that are otherwise described in the Pricing Prospectus and the Prospectus, (B) the repurchase of shares of capital stock upon termination of the holder’s employment or service with the Company pursuant to agreements providing for an option to repurchase, (C) the repurchase of capital stock pursuant to a right of first refusal on behalf of the Company or (D) the issuance, if any, of stock upon exercise, settlement or conversion of Company securities as disclosed in the Pricing Prospectus and the Prospectus), increase in long-term debt of the Company or any of its subsidiaries, or any change or effect, or any development involving a prospective change or effect, in or affecting (x) the business, properties, general affairs, management, financial position, stockholders’ equity or results of operations of the Company and its subsidiaries, taken as a whole, except as set forth or contemplated in the Pricing Prospectus and the Prospectus, or (y) the ability of the Company to perform its obligations under this Agreement or to consummate the transactions contemplated in the Pricing Prospectus and the Prospectus, the effect of which, in any such case described in clause (i) or (ii), is in your judgment so material and adverse as to make it impracticable or inadvisable to proceed with the public offering or the delivery of the Shares being delivered at the Time of Delivery on the terms and in the manner contemplated in the Pricing Prospectus and the Prospectus;

(h)    On or after the Applicable Time there shall not have occurred any of the following: (i) a suspension or material limitation in trading in securities generally on the Exchange or on the Nasdaq Global Market (“Nasdaq”); (ii) a suspension or material limitation in trading in the Company’s securities on the Exchange or on Nasdaq; (iii) a general moratorium on commercial banking activities declared by either Federal or New York State authorities or a material disruption in commercial banking or securities settlement or clearance services in the United States; (iv) the outbreak or escalation of hostilities involving the United States or the

declaration by the United States of a national emergency or war or (v) the occurrence of any other calamity or crisis or any change in financial, political or economic conditions in the United States or elsewhere, if the effect of any such event specified in clause (iv) or (v) in your judgment makes it impracticable or inadvisable to proceed with the public offering or the delivery of the Shares being delivered at the Time of Delivery on the terms and in the manner contemplated in the Pricing Prospectus and the Prospectus;

(i)    The Shares to be sold at the Time of Delivery shall have been duly listed for trading on the Exchange;

(j)    The Company shall have obtained and delivered to the Underwriters executed copies of an agreement from each director and executive officer of the Company, and the Selling Stockholder, substantially to the effect set forth in Annex I hereto in form and substance satisfactory to you;

(k)    The Company shall have complied with the provisions of Section 5(d) hereof with respect to the furnishing of prospectuses on the New York Business Day next succeeding the date of this Agreement;

(l)    The Company shall have furnished or caused to be furnished to you at the Time of Delivery a certificate of an officer of the Company, in such party’s capacity on behalf of the Company, and not in their individual capacity, reasonably satisfactory to you as to the accuracy of the representations and warranties of the Company, herein at and as of the Time of Delivery, as to the performance by the Company of all of its obligations hereunder to be performed at or prior to the Time of Delivery, as to such matters as you may reasonably request, and the Company shall have furnished or caused to be furnished certificates as to the matters set forth in subsections (a) and (g) of this Section 8; and

(m)    The Selling Stockholder shall have furnished or caused to be furnished to you at the Time of Delivery a certificate of the Selling Stockholder reasonably satisfactory to you as to the accuracy of the representations and warranties of the Selling Stockholder herein at and as of the Time of Delivery, as to the performance by the Selling Stockholder of all of its obligations hereunder to be performed at or prior to the Time of Delivery and as to such matters as you may reasonably request.

(9)    (a) The Company will indemnify and hold harmless each Underwriter, its affiliates (as such term is defined in Rule 501(b) under the Act), its selling agents and each person, if any, who controls any Underwriter within the meaning of Section 15 of the Act or Section 20 of the Exchange Act, against any losses, claims, damages or liabilities, joint or several, to which such Underwriter may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, the Basic Prospectus, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, or any Issuer Free Writing Prospectus, any “road show” as defined in Rule 433(h) under the Act, or any “issuer information” filed or required to be filed pursuant to Rule 433(d) under the Act or any Written Testing-the-Waters Communication, or

arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein, in the case of the Registration Statement (and any amendments and supplements thereto) only, not misleading and, in the case of such other documents, not misleading in light of the circumstances under which such statements were made, and will reimburse each Underwriter for any reasonable and documented legal or other expenses incurred by such Underwriter in connection with investigating or defending any such action or claim as such expenses are incurred; provided, however, that the Company shall not be liable in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon an untrue statement or alleged untrue statement or omission or alleged omission made in the Registration Statement, the Basic Prospectus, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, or any Issuer Free Writing Prospectus, any road show or any Written Testing-the-Waters Communication, in reliance upon and in conformity with the Underwriter Information and Selling Stockholder Information, as applicable.

(b)    The Selling Stockholder will indemnify and hold harmless each Underwriter against any losses, claims, damages or liabilities, joint or several, to which such Underwriter may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, the Basic Prospectus, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, any Issuer Free Writing Prospectus, any road show or any Testing-the-Waters Communication, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein, in the case of the Registration Statement (and any amendments and supplements thereto) only, not misleading and, in the case of such other documents, not misleading in light of the circumstances under which such statements were made, in each case, to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in the Registration Statement, the Basic Prospectus, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus or any amendment or supplement thereto or any Issuer Free Writing Prospectus, or any road show, or any Testing-the-Waters Communication, in reliance upon and in conformity with the Selling Stockholder Information; and will reimburse each Underwriter for any legal or other expenses reasonably incurred by such Underwriter in connection with investigating or defending any such action or claim as such expenses are incurred; provided, however, that the Selling Stockholder shall not be liable in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon an untrue statement or alleged untrue statement or omission or alleged omission made in the Registration Statement, the Basic Prospectus, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, or any Issuer Free Writing Prospectus, or any road show or any Testing-the-Waters Communication, in reliance upon and in conformity with the Underwriter Information; and provided, further, that the aggregate liability of a Selling Stockholder pursuant to this subsection (b) and subsection (f) shall not exceed the product of the number of Shares sold by the Selling Stockholder and the offering price of the Shares as set forth in the Prospectus (net of any underwriting discounts and commissions but before deducting expenses) (the “Selling Stockholder Proceeds”).

(c)    Each Underwriter, severally and not jointly, will indemnify and hold harmless the Company and the Selling Stockholder against any losses, claims, damages or liabilities to which the Company or the Selling Stockholder may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, the Basic Prospectus, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, or any Issuer Free Writing Prospectus, or any road show, or any Written Testing-the-Waters Communication, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein, in the case of the Registration Statement (and any amendments and supplements thereto) only, not misleading and, in the case of such other documents, not misleading in light of the circumstances under which such statements were made, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in the Registration Statement, the Basic Prospectus, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, or any Issuer Free Writing Prospectus or any road show or any Written Testing-the-Waters Communication in reliance upon and in conformity with the Underwriter Information; and will reimburse the Company and the Selling Stockholder for any reasonable and documented legal or other expenses incurred by the Company or the Selling Stockholder in connection with investigating or defending any such action or claim as such expenses are incurred. As used in this Agreement with respect to an Underwriter and an applicable document, “Underwriter Information” shall mean the written information furnished to the Company by such Underwriter expressly for use therein; it being understood and agreed upon that the only such information furnished by any Underwriter consists of the following information in the Prospectus furnished on behalf of each Underwriter: the information contained in the third sentence of the third paragraph and the first, second, third and seventh sentences in the eleventh paragraph, each under the caption “Underwriting”.

(d)    Promptly after receipt by an indemnified party under subsection (a), (b) or (c) of this Section 9 of notice of the commencement of any action, such indemnified party shall, if a claim in respect thereof is to be made against the indemnifying party under such subsection, notify the indemnifying party in writing of the commencement thereof; provided that the failure to notify the indemnifying party shall not relieve it from any liability that it may have under the preceding paragraphs of this Section 9 except to the extent that it has been materially prejudiced (through the forfeiture of substantive rights or defenses) by such failure; and provided further that the failure to notify the indemnifying party shall not relieve it from any liability that it may have to an indemnified party otherwise than under the preceding paragraphs of this Section 9. If any such action shall be brought against any indemnified party and it shall notify the indemnifying party of the commencement thereof: (1) in the case of a civil proceeding (excluding, for the avoidance of doubt, any governmental, regulatory or non-civil proceeding), the indemnifying party shall be entitled to participate in such civil proceeding and, to the extent that it shall wish, jointly with any other indemnifying party similarly notified, to assume the defense thereof, with counsel reasonably satisfactory to such indemnified party (who shall not, except with the consent of the indemnified party, be counsel to the indemnifying party), and, after notice from the indemnifying party to such indemnified party of its election so to assume

the defense thereof, the indemnifying party shall not be liable to such indemnified party under such subsection for any legal expenses of other counsel or any other expenses, in each case subsequently incurred by such indemnified party, in connection with the defense thereof other than reasonable costs of investigation; and (2) in the case of any governmental, regulatory or non-civil proceeding, upon request of the indemnified party, the indemnifying party shall retain counsel reasonably satisfactory to the indemnified party to represent the indemnified party and any others the indemnifying party may designate in such governmental, regulatory or non-civil proceeding and shall pay the fees and disbursements of such counsel related to such governmental, regulatory or non-civil proceeding. The indemnifying party shall not be liable for any settlement of any proceeding effected without its written consent, but if settled with such consent or if there be a final judgment for the plaintiff, the indemnifying party agrees to indemnify the indemnified party from and against any loss or liability by reason of such settlement or judgment.

(e)    No indemnifying party shall, without the written consent of the indemnified party, effect the settlement or compromise of, or consent to the entry of any judgment with respect to, any pending or threatened action or claim in respect of which indemnification or contribution may be sought hereunder (whether or not the indemnified party is an actual or potential party to such action or claim) unless such settlement, compromise or judgment (i) includes an unconditional release of the indemnified party from all liability arising out of such action or claim and (ii) does not include a statement as to or an admission of fault, culpability or a failure to act, by or on behalf of any indemnified party.

(f)    If the indemnification provided for in this Section 9 is unavailable to or insufficient to hold harmless an indemnified party under subsection (a), (b) or (c) above in respect of any losses, claims, damages or liabilities (or actions in respect thereof) referred to therein, then each indemnifying party shall contribute to the amount paid or payable by such indemnified party as a result of such losses, claims, damages or liabilities (or actions in respect thereof) in such proportion as is appropriate to reflect the relative benefits received by the Company and the Selling Stockholder on the one hand and the Underwriters on the other from the offering of the Shares. If, however, the allocation provided by the immediately preceding sentence is not permitted by applicable law, then each indemnifying party shall contribute to such amount paid or payable by such indemnified party in such proportion as is appropriate to reflect not only such relative benefits but also the relative fault of the Company and the Selling Stockholder on the one hand and the Underwriters on the other in connection with the statements or omissions which resulted in such losses, claims, damages or liabilities (or actions in respect thereof), as well as any other relevant equitable considerations. The relative benefits received by the Selling Stockholder on the one hand and the Underwriters on the other shall be deemed to be in the same proportion as the total net proceeds from the offering (after deducting underwriting discounts and commissions but before deducting expenses) received by the Selling Stockholder bear to the total underwriting discounts and commissions received by the Underwriters, in each case as set forth in the table on the cover page of the Prospectus. The relative fault shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Company or the Selling Stockholder on the one hand or the

Underwriters on the other and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. The Company, the Selling Stockholder and the Underwriters agree that it would not be just and equitable if contribution pursuant to this subsection (f) were determined by pro rata allocation (even if the Underwriters were treated as one entity for such purpose) or by any other method of allocation which does not take account of the equitable considerations referred to above in this subsection (f). The amount paid or payable by an indemnified party as a result of the losses, claims, damages or liabilities (or actions in respect thereof) referred to above in this subsection (f) shall be deemed to include any reasonable and documented legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this subsection (f), no Underwriter shall be required to contribute any amount in excess of the amount by which the total price at which the Shares underwritten by it and distributed to the public were offered to the public exceeds the amount of any damages which such Underwriter has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The Underwriters’ obligations in this subsection (f) to contribute are several in proportion to their respective underwriting obligations and not joint.

(g)    The obligations of the Company and the Selling Stockholder under this Section 9 shall be in addition to any liability which the Company and the Selling Stockholder may otherwise have and shall extend, upon the same terms and conditions, to each employee, officer and director of each Underwriter and each person, if any, who controls any Underwriter within the meaning of the Act and each broker-dealer or other affiliate of any Underwriter; and the obligations of the Underwriters under this Section 9 shall be in addition to any liability which the respective Underwriters may otherwise have and shall extend, upon the same terms and conditions, to each officer and director of the Company and to each person, if any, who controls the Company or the Selling Stockholder within the meaning of the Act.

(h)    Notwithstanding anything to the contrary, the aggregate liability of the Selling Stockholder under Sections 9(b) and 9(f) shall not in any event exceed an amount equal to the Selling Stockholder Proceeds.

(10)    (a) If any Underwriter shall default in its obligation to purchase the Shares which it has agreed to purchase hereunder at a Time of Delivery, you may in your discretion arrange for you or another party or other parties to purchase such Shares on the terms contained herein. If within thirty-six hours after such default by any Underwriter you do not arrange for the purchase of such Shares, then the Selling Stockholder shall be entitled to a further period of thirty-six hours within which to procure another party or other parties satisfactory to you to purchase such Shares on such terms. In the event that, within the respective prescribed periods, you notify the Company and the Selling Stockholder that you have so arranged for the purchase of such Shares, or the Selling Stockholder notifies you that it has so arranged for the purchase of such Shares, you or the Selling Stockholder shall have the right to postpone the Time of Delivery for a period of not more than seven days, in order to effect whatever changes may thereby be made necessary

in the Registration Statement or the Prospectus, or in any other documents or arrangements, and the Company agrees to file promptly any amendments or supplements to the Registration Statement or the Prospectus which in your opinion may thereby be made necessary. The term “Underwriter” as used in this Agreement shall include any person substituted under this Section 10 with like effect as if such person had originally been a party to this Agreement with respect to such Shares.

(b)    If, after giving effect to any arrangements for the purchase of the Shares of a defaulting Underwriter or Underwriters by you and the Selling Stockholder as provided in subsection (a) above, the aggregate number of such Shares which remains unpurchased does not exceed one-eleventh of the aggregate number of all the Shares to be purchased at the Time of Delivery, then the Selling Stockholder shall have the right to require each non-defaulting Underwriter to purchase the number of Shares which such Underwriter agreed to purchase hereunder at the Time of Delivery and, in addition, to require each non-defaulting Underwriter to purchase its pro rata share (based on the number of Shares which such Underwriter agreed to purchase hereunder) of the Shares of such defaulting Underwriter or Underwriters for which such arrangements have not been made; but nothing herein shall relieve a defaulting Underwriter from liability for its default.

(c)    If, after giving effect to any arrangements for the purchase of the Shares of a defaulting Underwriter or Underwriters by you and the Selling Stockholder as provided in subsection (a) above, the aggregate number of such Shares which remains unpurchased exceeds one-eleventh of the aggregate number of all the Shares to be purchased at the Time of Delivery, or if the Selling Stockholder shall not exercise the right described in subsection (b) above to require non-defaulting Underwriters to purchase Shares of a defaulting Underwriter or Underwriters, then this Agreement shall thereupon terminate, without liability on the part of any non-defaulting Underwriter, the Company or the Selling Stockholder, except for the expenses to be borne by the Company, the Selling Stockholder and the Underwriters as provided in Section 7 hereof and the indemnity and contribution agreements in Section 9 hereof; but nothing herein shall relieve a defaulting Underwriter from liability for its default.

(11)    The respective indemnities, rights of contribution, agreements, representations, warranties and other statements of the Company, the Selling Stockholder and the several Underwriters, as set forth in this Agreement or made by or on behalf of them, respectively, pursuant to this Agreement, shall remain in full force and effect, regardless of any investigation (or any statement as to the results thereof) made by or on behalf of any Underwriter or any director, officer, employee, affiliate or controlling person of any Underwriter, or the Company, or the Selling Stockholder, or any officer or director or controlling person of the Company, or any controlling person of the Selling Stockholder, and shall survive delivery of and payment for the Shares.

(12)    If this Agreement shall be terminated pursuant to Section 10 hereof, neither the Company nor the Selling Stockholder shall then be under any liability to any Underwriter except as provided in Sections 7 and 9 hereof; but, if for any other reason any Shares are not delivered by or on behalf of the Selling Stockholder as provided herein (other than pursuant to clauses (i),

(iii), (iv) or (v) of Section 8(h) hereof), the Selling Stockholder will reimburse the Underwriters through you for all reasonable and documented out-of-pocket expenses, including fees and disbursements of counsel, reasonably incurred by such Underwriters in making preparations for the purchase, sale and delivery of the Shares not so delivered, but the Company and the Selling Stockholder shall then be under no further liability to any Underwriter except as provided in Sections 7 and 9 hereof.

(13)    All statements, requests, notices and agreements hereunder shall be in writing, and if to the Underwriters shall be delivered or sent by mail or email to Goldman Sachs & Co. LLC, 200 West Street, New York, New York 10282-2198, Attention: Registration Department, Email: registration-syndops@ny.email.gs.com and Morgan Stanley & Co. LLC, 1585 Broadway, New York, New York 10036, Attention: Equity Syndicate Desk, with a copy to the Legal Department;if to the Selling Stockholder shall be delivered or sent by mail to counsel for the Selling Stockholder at c/o Goodwin Procter LLP, 100 Northern Avenue, Boston, MA 02210, Attn: Michael J. Minahan; if to the Company shall be delivered or sent by mail to the address of the Company set forth on the cover of the Registration Statement, Attention: Secretary; and if to any stockholder that has delivered a lock-up letter described in Section 8(j) hereof shall be delivered or sent by mail to such address as such stockholder provides in writing to the Company.

In accordance with the requirements of the USA Patriot Act (Title III of Pub. L. 107-56 (signed into law October 26, 2001)), the Underwriters are required to obtain, verify and record information that identifies their respective clients, including the Company and the Selling Stockholder, which information may include the name and address of their respective clients, as well as other information that will allow the Underwriters to properly identify their respective clients.

(14)    This Agreement shall be binding upon, and inure solely to the benefit of, the Underwriters, the Company and the Selling Stockholder and, to the extent provided in Sections 9 and 11 hereof, the officers and directors of the Company and each person who controls the Company, the Selling Stockholder or any Underwriter, or any director, officer, employee, or affiliate of any Underwriter, and their respective heirs, executors, administrators, successors and assigns, and no other person shall acquire or have any right under or by virtue of this Agreement. No purchaser of any of the Shares from any Underwriter shall be deemed a successor or assign by reason merely of such purchase.

(15)    Time shall be of the essence of this Agreement. As used herein, the term “business day” shall mean any day when the Commission’s office in Washington, D.C. is open for business.

(16)    (a) The Company and the Selling Stockholder acknowledge and agree that (i) the purchase and sale of the Shares pursuant to this Agreement is an arm’s-length commercial transaction between the Company and the Selling Stockholder, on the one hand, and the several Underwriters, on the other, (ii) in connection therewith and with the process leading to such transaction each Underwriter is acting solely as a principal and not the agent or fiduciary of the Company or the Selling Stockholder, (iii) no Underwriter has assumed an advisory or fiduciary responsibility in favor of the Company or the Selling Stockholder with respect to the offering

contemplated hereby or the process leading thereto (irrespective of whether such Underwriter has advised or is currently advising the Company or the Selling Stockholder on other matters) or any other obligation to the Company or the Selling Stockholder except the obligations expressly set forth in this Agreement, (iv) the Company and the Selling Stockholder has consulted its own legal and financial advisors to the extent it deemed appropriate and (v) none of the activities of the Underwriters in connection with the transactions contemplated herein constitutes a recommendation, investment advice, or solicitation of any action by the Underwriters with respect to any entity or natural person. The Company and the Selling Stockholder agree that they will not claim that the Underwriters, or any of them, has rendered advisory services of any nature or respect, or owes a fiduciary or similar duty to the Company or the Selling Stockholder, in connection with such transaction or the process leading thereto.

(b)    [Reserved].

(c)    The Selling Stockholder further acknowledges and agrees that, although the Underwriters may provide the Selling Stockholder with certain Regulation Best Interest and Form CRS disclosures or other related documentation in connection with the offering, the Underwriters are not making a recommendation to the Selling Stockholder to participate in the offering or sell any Shares, and nothing set forth in such disclosures or documentation is intended to suggest that any Underwriter is making such a recommendation.

(17)    This Agreement supersedes all prior agreements and understandings (whether written or oral) between the Company, the Selling Stockholder and the Underwriters, or any of them, with respect to the subject matter hereof.

(18)    This Agreement and any transaction contemplated by this Agreement and any claim, controversy or dispute arising under or related thereto shall be governed by and construed in accordance with the laws of the State of New York without regard to principles of conflict of laws that would result in the application of any other law than the laws of the State of New York. The Company and the Selling Stockholder agree that any suit or proceeding arising in respect of this Agreement or any transaction contemplated by this Agreement will be tried exclusively in the U.S. District Court for the Southern District of New York or, if that court does not have subject matter jurisdiction, in any state court located in The City and County of New York and the Company and the Selling Stockholder agree to submit to the jurisdiction of, and to venue in, such courts.

(19)    The Company, the Selling Stockholder and each of the Underwriters hereby irrevocably waives, to the fullest extent permitted by applicable law, any and all right to trial by jury in any legal proceeding arising out of or relating to this Agreement or the transactions contemplated hereby.

(20)    This Agreement may be executed by any one or more of the parties hereto in any number of counterparts, each of which shall be deemed to be an original, but all such counterparts shall together constitute one and the same instrument. Counterparts may be delivered via electronic mail (including any electronic signature covered by the U.S. federal ESIGN Act of 2000, Uniform Electronic Transactions Act, the Electronic Signatures and Records Act or other

applicable law, e.g., www.docusign.com) or other transmission method and any counterpart so delivered shall be deemed to have been duly and validly delivered and be valid and effective for all purposes.

(21)    Notwithstanding anything herein to the contrary, the Company and the Selling Stockholder are authorized to disclose to any persons the U.S. federal and state income tax treatment and tax structure of the potential transaction and all materials of any kind (including tax opinions and other tax analyses) provided to the Company and the Selling Stockholder relating to that treatment and structure, without the Underwriters imposing any limitation of any kind. However, any information relating to the tax treatment and tax structure shall remain confidential (and the foregoing sentence shall not apply) to the extent necessary to enable any person to comply with securities laws. For this purpose, “tax structure” is limited to any facts that may be relevant to that treatment.

(22)    Recognition of the U.S. Special Resolution Regimes.

(a)    In the event that any Underwriter that is a Covered Entity becomes subject to a proceeding under a U.S. Special Resolution Regime, the transfer from such Underwriter of this Agreement, and any interest and obligation in or under this Agreement, will be effective to the same extent as the transfer would be effective under the U.S. Special Resolution Regime if this Agreement, and any such interest and obligation, were governed by the laws of the United States or a state of the United States.

(b)    In the event that any Underwriter that is a Covered Entity or a BHC Act Affiliate of such Underwriter becomes subject to a proceeding under a U.S. Special Resolution Regime, Default Rights under this Agreement that may be exercised against such Underwriter are permitted to be exercised to no greater extent than such Default Rights could be exercised under the U.S. Special Resolution Regime if this Agreement were governed by the laws of the United States or a state of the United States.

(c)    For purposes of this Section 22, a “BHC Act Affiliate” has the meaning assigned to the term “affiliate” in, and shall be interpreted in accordance with, 12 U.S.C. § 1841(k). “Covered Entity” means any of the following: (i) a “covered entity” as that term is defined in, and interpreted in accordance with, 12 C.F.R. § 252.82(b); (ii) a “covered bank” as that term is defined in, and interpreted in accordance with, 12 C.F.R. § 47.3(b); or (iii) a “covered FSI” as that term is defined in, and interpreted in accordance with, 12 C.F.R. § 382.2(b). “Default Right” has the meaning assigned to that term in, and shall be interpreted in accordance with, 12 C.F.R. §§ 252.81, 47.2 or 382.1, as applicable. “U.S. Special Resolution Regime” means each of (i) the Federal Deposit Insurance Act and the regulations promulgated thereunder and (ii) Title II of the Dodd-Frank Wall Street Reform and Consumer Protection Act and the regulations promulgated thereunder.

If the foregoing is in accordance with your understanding, please sign and return to us counterparts hereof, and upon the acceptance hereof by you, on behalf of each of the Underwriters, this letter and such acceptance hereof shall constitute a binding agreement among each of the Underwriters, the Company and the Selling Stockholder. It is understood that your

acceptance of this letter on behalf of each of the Underwriters is pursuant to the authority set forth in a form of Agreement among Underwriters, the form of which shall be submitted to the Company and the Selling Stockholder for examination, upon request, but without warranty on your part as to the authority of the signers thereof.

The undersigned understands that you, as the representatives (the “Representatives”) of the underwriters (the “Underwriters”), propose to enter into an underwriting agreement (the “Underwriting Agreement”) with Klaviyo, Inc., a Delaware corporation (the “Company”), and the Selling Stockholder listed on Schedule I to the Underwriting Agreement (the “Selling Stockholder”), providing for the offering (the “Public Offering”) of shares of Series A Common Stock, par value $0.001 per share, of the Company (the “Series A Common Stock”) by the Selling Stockholder (the “Shares”) pursuant to a Registration Statement on Form S-3 (File No. 333-285069) (the “Registration Statement”) filed with the Securities and Exchange Commission (the “SEC”). In connection with the offering of the Shares and the transactions contemplated by the Underwriting Agreement, the Selling Stockholder will convert shares of Series B Common Stock, par value $0.001 per share, of the Company (the “Series B Common Stock” and together with the Series A Common Stock, the “Common Stock”) for shares of Series A Common stock on a one-for-one basis.

In consideration of the agreement by the Underwriters to offer and sell the Shares, and of other good and valuable consideration the receipt and sufficiency of which is hereby acknowledged, the undersigned agrees that, during the period beginning from the date of this letter (the “Lock-Up Agreement”) and continuing to and including the date that is 90 days after the date of the final prospectus supplement relating to the Public Offering (the “Prospectus Supplement”) (such period, the “Lock-Up Period”), the undersigned shall not, and shall not cause or direct any of its affiliates to, (i) offer, sell, contract to sell, pledge, grant any option, right or warrant to purchase, purchase any option or contract to sell, lend or otherwise transfer or dispose of any shares of Common Stock, or any options or warrants to purchase any shares of Common Stock, or any securities convertible into, exchangeable for or that represent the right to receive shares of Common Stock (such shares of Common Stock, options, rights, warrants or other securities, collectively, “Lock-Up Securities”), including without limitation any such Lock-Up Securities now owned or hereafter acquired by the undersigned, (ii) engage in any hedging or other transaction or arrangement (including, without limitation, any short sale or the purchase or sale of, or entry into, any put or call option, or combination thereof, forward, swap or any other derivative

transaction or instrument, however described or defined) which is designed to or which reasonably could be expected to lead to or result in a sale, loan, pledge or other disposition (whether by the undersigned or someone other than the undersigned), or transfer of any of the economic consequences of ownership, in whole or in part, directly or indirectly, of any Lock-Up Securities, whether any such transaction or arrangement (or instrument provided for thereunder) would be settled by delivery of Common Stock or other securities, in cash or otherwise (any such sale, loan, pledge or other disposition, or transfer of economic consequences, a “Transfer”), (iii) make any demand for or exercise any right with respect to the registration of any Lock-Up Securities or (iv) otherwise publicly announce any intention to engage in or cause any action, activity, transaction or arrangement described in clause (i), (ii) or (iii) above. Notwithstanding the foregoing, to the extent the undersigned has demand and/or piggyback registration rights under any agreement described in the Prospectus Supplement or the prospectus included in the Registration Statement immediately prior to the time the Underwriting Agreement is executed (the “Prospectus”), the undersigned may notify the Company privately that the undersigned is or will be exercising its demand and/or piggyback registration rights under any such registration rights agreement following the expiration of the Lock-Up Period and undertake preparations related thereto; provided that the foregoing notification and/or preparations do not request, require or result in the filing of a registration statement with the SEC or any other public announcement of such proposed registration by the undersigned, the Company or any third party during the Lock-Up Period (and no such filing, confidential submission or public announcement shall be voluntarily made or taken by the undersigned, the Company or any third party during the Lock-Up Period). The undersigned represents and warrants that the undersigned is not, and has not caused or directed any of its affiliates to be or become, currently a party to any agreement or arrangement that provides for, is designed to or reasonably could be expected to lead to or result in any Transfer during the Lock-Up Period.

Notwithstanding the foregoing, the undersigned may:

a)transfer the undersigned’s Lock-Up Securities

i.as one or more bona fide gifts or charitable contributions, or for bona fide estate planning purposes;

ii.upon death or by will, intestate succession, other testamentary document, or pursuant to a so-called “living trust” or other revocable trust established to provide for the disposition of property on the undersigned’s death;

iii.if the undersigned is a natural person, to any member of the undersigned’s immediate family (for purposes of this Lock-Up Agreement, “immediate family” shall mean any relationship by blood, current or former marriage, domestic partnership or adoption, not more remote than first cousin) or to any trust for the direct or indirect benefit of the undersigned or the immediate family of the undersigned or, if the undersigned is a trust, to a trustor, trustee, or beneficiary of the trust or the estate of a beneficiary of such trust;

iv.to a partnership, limited liability company, corporation or other entity of which the undersigned and the immediate family of the undersigned are the legal and beneficial owner of all of the outstanding equity securities or similar interests;

v.to a nominee or custodian of a person or entity to whom a disposition or transfer would be permissible under clauses (a)(i) through (iv) above;

vi.if the undersigned is a corporation, partnership, limited liability company, trust, or other business entity, (A) to another corporation, partnership, limited liability company, trust, or other business entity that is an affiliate (as defined in Rule 405 under the Securities Act of 1933, as amended (the “Securities Act”)) of the undersigned, (B) to any investment fund or other entity controlling, controlled by, managing or managed by or under common control with the undersigned or affiliates of the undersigned (including, for the avoidance of doubt, where the undersigned is a partnership, to its general partner or a successor partnership or fund, or any other funds managed by such partnership), (C) as part of a distribution, transfer, or disposition by the undersigned to its stockholders, partners, members or other equityholders, as the case may be, or to the estate of any such stockholders, partners, members or other equityholders, (D) to any wholly owned subsidiary of the undersigned or (E) if a transferee referred to in clauses (A) through (D) above is not a natural person, any director or indirect partner, member, stockholder or equityholder of such transferee until the Lock-Up Securities come to be held by a natural person;

vii.by operation of law, such as pursuant to a qualified domestic order, divorce settlement, divorce decree, separation agreement, or other order of a court or regulatory agency;

viii.to the Company from a current or former employee or service provider of the Company in connection with the repurchase of shares of Common Stock issued pursuant to equity awards granted under a stock incentive plan or other equity award plan, which plan is described in the Prospectus or the Prospectus Supplement, or pursuant to the agreements pursuant to which such shares were issued, or upon death, disability or termination of employment, in each case, of such employee or service provider;

ix.if the undersigned is not an officer or director of the Company, in connection with a sale of the undersigned’s Lock-Up Securities acquired in open market transactions after the closing date of the Public Offering;

x.to the Company in connection with the vesting, settlement or exercise of restricted stock units, shares of restricted stock, options, warrants or other rights to purchase shares of Common Stock (including, in each case, by way of “net” or “cashless” exercise), including any transfer to the Company for the payment of tax withholdings or remittance payments due as a result of the vesting, settlement or exercise of such restricted stock units, shares of restricted stock, options, warrants or other rights, or in connection with the conversion of convertible securities, in all such cases pursuant to equity awards granted under a stock incentive plan or other equity award plan, or pursuant to the terms of convertible securities, each as described in the Registration Statement, the Prospectus or the Prospectus Supplement (including the documents incorporated by reference therein), as applicable, provided that any securities received upon such vesting, settlement, exercise or conversion shall be subject to the terms of this Lock-Up Agreement;

xi.in “sell to cover” or similar open market transactions (including, without limitation, sales pursuant to any written plan meeting the requirements of Rule 10b5-1 (a “10b5-1 Plan”) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”) relating to the transfer, sale or other disposition of the undersigned’s Lock-Up Securities) during the Lock-Up Period to satisfy tax withholding obligations as a result of the exercise, vesting

and/or settlement of Company equity awards (including options and restricted stock units) held by the undersigned and issued pursuant to a plan or arrangement described in the Prospectus or the Prospectus Supplement (including the documents incorporated by reference therein);

xii.pursuant to a bona fide third-party tender offer, merger, consolidation or other similar transaction that is approved by the Board of Directors (or a duly authorized committee thereof) of the Company involving a Change of Control of the Company (for purposes hereof, “Change of Control” shall mean the transfer (whether by tender offer, merger, consolidation or other similar transaction), in one transaction or a series of related transactions, to a person or group of affiliated persons, of shares of capital stock if, after such transfer, such person or group of affiliated persons would hold at least a majority of the outstanding voting securities of the Company (or the surviving entity)); provided that in the event that such tender offer, merger, consolidation or other similar transaction is not completed, the undersigned’s Lock-Up Securities shall remain subject to the provisions of this Lock-Up Agreement;

xiii.to the Company in connection with the conversion or reclassification of the outstanding equity securities of the Company into shares of Common Stock, including the conversion of outstanding shares of Series B Common Stock into shares of Series A Common Stock in accordance with the Company’s certificate of incorporation, including in connection with the Public Offering, provided that any such shares of Common Stock received upon such conversion or reclassification shall be subject to the terms of this Lock-Up Agreement;

xiv.in a transaction consummated in accordance with a 10b5-1 Plan existing or entered into prior to the date hereof; or

xv.with the prior written consent of the Representatives on behalf of the Underwriters;

provided that (A) in the case of clauses (a)(i), (ii), (iii), (iv), (v) and (vi) above, such transfer or distribution shall not involve a disposition for value, (B) in the case of clauses (a)(i), (ii), (iii), (iv), (v), (vi) and (vii) above, it shall be a condition to the transfer or distribution that the donee, devisee, transferee or distributee, as the case may be, shall sign and deliver a lock-up agreement in the form of this Lock-Up Agreement, (C) in the case of clauses (a)(ii), (iii), (iv), (v) and (vi) above, no filing by any party (including, without limitation, any donor, donee, devisee, transferor, transferee, distributor or distributee) under the Exchange Act, or other public filing, report or announcement reporting a reduction in beneficial ownership of Lock-Up Securities shall be required or shall be voluntarily made in connection with such transfer or distribution, and (D) in the case of clauses (a)(i), (vii), (viii), (ix), (x) and (xi) above, no filing under the Exchange Act or other public filing, report or announcement shall be voluntarily made, and if any such filing, report or announcement shall be legally required during the Lock-Up Period, such filing, report or announcement shall clearly indicate in the footnotes thereto (A) the circumstances of such transfer or distribution and (B) in the case of a transfer or distribution pursuant to clauses (a)(i) or (a)(vii) above, that the donee, devisee, transferee or distributee has agreed to be bound by a lock-up agreement in the form of this Lock-Up Agreement;

b)exercise outstanding options, settle restricted stock units or other equity awards pursuant to plans described in the Registration Statement, the Pricing Disclosure Package (as defined in the

Underwriting Agreement) and the Prospectus (including the documents incorporated by reference therein) or exercise warrants described in the Registration Statement, the Pricing Disclosure Package and the Prospectus; provided that any Lock-Up Securities received upon such exercise, vesting or settlement shall be subject to the terms of this Lock-Up Agreement;

c)enter into a 10b5-1 Plan relating to the transfer, sale or other disposition of the undersigned’s Lock-Up Securities, if then permitted by the Company, provided that none of the securities subject to such plan may be transferred, sold or otherwise disposed of until after the expiration of the Lock-Up Period (except to the extent otherwise allowed pursuant to this Lock-Up Agreement) and no public announcement, report or filing under the Exchange Act, or any other public filing, report or announcement, shall be voluntarily made regarding the establishment of such plan during the Lock-Up Period (other than as required under Item 408 and Item 601 of Regulation S-K) other than any announcement related to the 10b5-1 Plan announced on May 13, 2025 as previously agreed to by Mr. Bialecki and the Representatives; and

d)sell the Shares to be sold by the undersigned, if any, pursuant to the terms of the Underwriting Agreement.

If the undersigned is not a natural person, the undersigned represents and warrants that no single natural person, entity or “group” (within the meaning of Section 13(d)(3) of the Exchange Act), other than a natural person, entity or “group” (as described above) that has executed a Lock-Up Agreement in substantially the same form as this Lock-Up Agreement, beneficially owns, directly or indirectly, 50% or more of the common equity interests, or 50% or more of the voting power, in the undersigned.

Notwithstanding anything to the contrary herein, if the undersigned is an officer or a director of the Company, the undersigned hereby acknowledges that the undersigned shall remain subject to the Company’s regular quarterly “black-out” periods under the Company’s insider trading policy.

The undersigned now has, and, except as contemplated hereby, for the duration of this Lock-Up Agreement will have, good and marketable title to the undersigned’s Lock-Up Securities, free and clear of all liens, encumbrances and claims whatsoever. The undersigned also agrees and consents to the entry of stop transfer instructions with the Company’s transfer agent and registrar against the transfer of the undersigned’s Lock-Up Securities except in compliance with the foregoing restrictions.

The undersigned acknowledges and agrees that none of the Underwriters has made any recommendation or provided any investment or other advice to the undersigned with respect to this Lock-Up Agreement or the subject matter hereof, and the undersigned has consulted its own legal, accounting, financial, regulatory, tax and other advisors with respect to this Lock-Up Agreement and the subject matter hereof to the extent the undersigned has deemed appropriate. The undersigned further acknowledges and agrees that, although the Underwriters may have provided or hereafter provide to the undersigned in connection with the Public Offering a Form CRS and/or certain other disclosures as contemplated by Regulation Best Interest, the Underwriters have not made and are not making a recommendation to the undersigned to enter into this Lock-Up Agreement or to transfer, sell or dispose of, or to refrain from transferring, selling or disposing of, any shares of Common Stock, and nothing set forth in such disclosures or herein is intended to suggest that any Underwriter is making such a recommendation.

This Lock-Up Agreement shall automatically terminate and the undersigned shall be automatically released from all of his, her or its obligations hereunder upon the earlier of (i) the date on

which for any reason the Underwriting Agreement is terminated (other than the provisions thereof that survive termination) prior to payment for and delivery of the Shares to be sold thereunder, (ii) the date on which the Selling Stockholder notifies the Underwriters, in writing and prior to the execution of the Underwriting Agreement, that he does not intend to proceed with the Public Offering and (iii) May 31, 2025.

The undersigned understands that the Company and the Underwriters are relying upon this Lock-Up Agreement in proceeding toward consummation of the Public Offering. The undersigned further understands that this Lock-Up Agreement is irrevocable and shall be binding upon the undersigned’s heirs, legal representatives, successors and assigns. The undersigned hereby represents and warrants that the undersigned has full power and authority to enter into this Lock-Up Agreement. This Lock-Up Agreement shall be governed by, and construed in accordance with, the laws of the State of New York, without regard to principles of conflict of laws that would result in the application of any law other than the laws of the State of New York. This Lock-Up Agreement may be delivered via electronic mail (including pdf or any electronic signature complying with the U.S. federal ESIGN Act of 2000, e.g., www.docusign.com or www.echosign.com) or other transmission method, and any counterpart so delivered shall be deemed to have been duly and validly delivered and be valid and effective for all purposes.