GENSIGHT BIOLOGICS S.A. (a société anonyme incorporated under the laws of France) [●] American Depositary Shares, Each Representing [●] Ordinary Share[s] (nominal value €[●] per share) UNDERWRITING AGREEMENT

Exhibit 1.1

GENSIGHT BIOLOGICS S.A.

(a société anonyme incorporated under the laws of France)

[●] American Depositary Shares,

Each Representing [●] Ordinary Share[s]

(nominal value €[●] per share)

UNDERWRITING AGREEMENT

Dated: [●], 2015

GENSIGHT BIOLOGICS S.A.

(a société anonyme incorporated under the laws of France)

[●] American Depositary Shares,

Each Representing [●] Ordinary Share[s]

(nominal value €[●] per share)

UNDERWRITING AGREEMENT

[●], 2015

Leerink Partners LLC

Evercore Group L.L.C.

as Representatives of the several Underwriters named in Schedule A hereto

c/o Leerink Partners LLC

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▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇

Ladies and Gentlemen:

GenSight Biologics S.A., a société anonyme incorporated under the laws of France (the “Company”), confirms its agreement with Leerink Partners LLC (“Leerink”), Evercore Group L.L.C. (“Evercore”) and each of the other Underwriters named in Schedule A hereto (collectively, the “Underwriters,” which term shall also include any underwriter substituted as hereinafter provided in Section 10 hereof), for whom Leerink and Evercore are acting as representatives (in such capacity, the “Representatives”), with respect to (i) the sale by the Company and the purchase by the Underwriters, acting severally and not jointly, of an aggregate of [●] ordinary shares, nominal value €[●] per share, of the Company (the “Ordinary Shares”) to be delivered in the form of an aggregate of [●] American Depositary Shares (“ADSs”), as set forth in Schedule A hereto, and (ii) the grant by the Company to the Underwriters, acting severally and not jointly, of the option described in Section 2(b) hereof to purchase all or any part of [●] additional Ordinary Shares to be delivered in the form of ADSs. The aforesaid [●] ADSs (the “Initial ADSs”) to be purchased by the Underwriters and all or any part of the [●] ADSs subject to the option described in Section 2(b) hereof (the “Option ADSs”) are herein collectively called the “Offered ADSs.” The Ordinary Shares to be delivered in the form of the Initial ADSs are hereinafter called the “Initial Shares” and the Ordinary Shares to be delivered in the form of the Option ADSs are hereinafter called the “Option Shares,” and the Initial Shares and the Option Shares are herein collectively called the “Shares.” The Offered ADSs and the Shares represented thereby are herein collectively called the “Securities.”

The Shares are to be deposited pursuant to a deposit agreement (the “Deposit Agreement”), to be dated on or prior to the Closing Time (as defined in Section 2(c) hereof), among the Company, [●], as depositary (the “Depositary”), and holders and beneficial holders from time to time of the American Depositary Receipts (the “ADRs”) issued by the Depositary and evidencing the ADSs. Each Offered ADS will initially represent [●] Share[s] deposited pursuant to the Deposit Agreement.

The Company understands that the Underwriters propose to make a public offering of the Offered ADSs as soon as the Representatives deem advisable after this Underwriting Agreement (this “Agreement”) has been executed and delivered.

The Company has filed with the Securities and Exchange Commission (the “Commission”) a registration statement on Form F-1 (No. 333-[●]), including the related preliminary prospectus or prospectuses, covering the registration of the sale of the Shares under the Securities Act of 1933, as amended (the “1933 Act”). Promptly after execution and delivery of this Agreement, the Company will prepare and file a prospectus in accordance with the provisions of Rule 430A (“Rule 430A”) of the rules and regulations of the Commission under the 1933 Act (the “1933 Act Regulations”) and Rule 424(b) (“Rule 424(b)”) of the 1933 Act Regulations. The information included in such prospectus that was omitted from such registration statement at the time such registration statement became effective but that is deemed to be part of such registration statement at the time it became effective pursuant to Rule 430A(b) is herein called the “Rule 430A Information.” Such registration statement, including the amendments thereto, the exhibits thereto and any schedules thereto at the time it became effective, and including the Rule 430A Information, is herein called the “Registration Statement.” Any registration statement filed pursuant to Rule 462(b) of the 1933 Act Regulations is herein called the “Rule 462(b) Registration Statement” and, after such filing, the term “Registration Statement” shall include the Rule 462(b) Registration Statement. Each prospectus used prior to the effectiveness of the Registration Statement, and each prospectus that omitted the Rule 430A Information that was used after such effectiveness and prior to the execution and delivery of this Agreement is herein called a “preliminary prospectus.” The final prospectus, in the form first furnished to the Underwriters for use in connection with the offering of the Offered ADSs is herein called the “Prospectus.” The Company has filed with the Commission a registration statement on Form F-6 (No. 333-[●]) covering the registration of the Offered ADSs under the 1933 Act. The registration statement relating to the Offered ADSs, as amended at the time it became effective, is hereinafter referred to as the “ADS Registration Statement.” The Company has also filed with the Commission, in accordance with Section 12 of the Securities Exchange Act of 1934, as amended (the “1934 Act”), and the rules and regulations of the Commission thereunder (the “1934 Act Regulations”), a registration statement on Form 8-A (File No. 001-[●]) under the 1934 Act to register, under Section 12(b) of the 1934 Act, the Ordinary Shares and the ADSs. The registration statement relating to the Ordinary Shares and the ADSs, as amended at the time it became effective, is hereinafter referred to as the “1934 Act Registration Statement.” For purposes of this Agreement, all references to the Registration Statement, the ADS Registration Statement, the 1934 Act Registration Statement, any preliminary prospectus, the Prospectus or any amendment or supplement to any of the foregoing shall be deemed to include the copy filed with the Commission pursuant to its Electronic Data Gathering, Analysis and Retrieval system or any successor system (“▇▇▇▇▇”).

As used in this Agreement:

“Applicable Time” means [●]:[●] [P.M.], New York City time, on [●], 2015 or such other time as agreed by the Company and the Representatives.

“General Disclosure Package” means any Issuer General Use Free Writing Prospectuses issued at or prior to the Applicable Time, the most recent preliminary prospectus that is distributed to investors prior to the Applicable Time and the information included on Schedule B-1 hereto, all considered together.

“Issuer Free Writing Prospectus” means any “issuer free writing prospectus,” as defined in Rule 433 of the 1933 Act Regulations (“Rule 433”), including, without limitation, any “free writing prospectus” (as defined in Rule 405 of the 1933 Act Regulations (“Rule 405”)) relating to the Securities that is (i) required to be filed with the Commission by the Company, (ii) a “road

show that is a written communication” within the meaning of Rule 433(d)(8)(i), whether or not required to be filed with the Commission, or (iii) exempt from filing with the Commission pursuant to Rule 433(d)(5)(i) because it contains a description of the Securities or of the offering that does not reflect the final terms, in each case in the form filed or required to be filed with the Commission or, if not required to be filed, in the form retained in the Company’s records pursuant to Rule 433(g).

“Issuer General Use Free Writing Prospectus” means any Issuer Free Writing Prospectus that is intended for general distribution to prospective investors (other than a “bona fide electronic road show,” as defined in Rule 433 (a “Bona Fide Electronic Road Show”)), as evidenced by its being specified in Schedule B-2 hereto.

“Issuer Limited Use Free Writing Prospectus” means any Issuer Free Writing Prospectus that is not an Issuer General Use Free Writing Prospectus.

“Testing-the-Waters Communication” means any oral or written communication with potential investors undertaken in reliance on Section 5(d) of the 1933 Act.

“Written Testing-the-Waters Communication” means any Testing-the-Waters Communication that is a written communication within the meaning of Rule 405.

SECTION 1. Representations and Warranties.

(a) Representations and Warranties by the Company. The Company represents and warrants to each Underwriter as of the date hereof, the Applicable Time, the Closing Time (as defined below) and any Date of Delivery (as defined below), and agrees with each Underwriter, as follows:

(i) Registration Statements and Prospectuses. Each of the Registration Statement and the ADS Registration Statement and any amendment thereto has become effective under the 1933 Act. No stop order suspending the effectiveness of the Registration Statement or the ADS Registration Statement or any post-effective amendment thereto has been issued under the 1933 Act, no order preventing or suspending the use of any preliminary prospectus or the Prospectus has been issued by the Commission and no proceedings for any of those purposes have been instituted by the Commission or are pending or, to the Company’s knowledge, contemplated by the Commission. The Company has complied with each request (if any) from the Commission for additional information.

Each of the Registration Statement and the ADS Registration Statement and any post-effective amendment thereto, at the time it became effective, complied in all material respects with the requirements of the 1933 Act and the 1933 Act Regulations. Each preliminary prospectus, the Prospectus and any amendment or supplement thereto, at the time each was filed with the Commission, complied in all material respects with the requirements of the 1933 Act and the 1933 Act Regulations. Each preliminary prospectus delivered to the Underwriters for use in connection with the offering of the Offered ADSs and the Prospectus was or will be identical to the electronically transmitted copies thereof filed with the Commission pursuant to ▇▇▇▇▇, except to the extent permitted by Regulation S-T.

The Registration Statement, any preliminary prospectus, the Prospectus and the ADS Registration Statement and the filing of the Registration Statement, any preliminary prospectus, the Prospectus and the ADS Registration Statement with the Commission have been duly authorized by and on behalf of the Company, and each of the Registration Statement and the ADS Registration Statement has been duly executed pursuant to such authorization.

(ii) Accurate Disclosure. None of the Registration Statement, the ADS Registration Statement and any amendments thereto, at its effective time, at the Closing Time or at any Date of Delivery, contained, contains or will contain an untrue statement of a material fact or omitted, omits or will omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading. As of the Applicable Time, none of (A) the General Disclosure Package, (B) any individual Issuer Limited Use Free Writing Prospectus, when considered together with the General Disclosure Package, nor (C) any individual Written Testing-the-Waters Communication, when considered together with the General Disclosure Package, included, includes or will include an untrue statement of a material fact or omitted, omits or will omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading. Neither the Prospectus nor any amendment or supplement thereto (including any prospectus wrapper), as of its issue date, at the time of any filing with the Commission pursuant to Rule 424(b), at the Closing Time or at any Date of Delivery, included, includes or will include an untrue statement of a material fact or omitted, omits or will omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading.

The representations and warranties in this subsection shall not apply to statements in or omissions from the Registration Statement (or any amendment thereto), the ADS Registration Statement (or any amendment thereto), the General Disclosure Package or the Prospectus (or any amendment or supplement thereto, including any prospectus wrapper) made in reliance upon and in conformity with written information furnished to the Company by any Underwriter through the Representatives expressly for use therein. For purposes of this Agreement, the only information so furnished shall be the information in [“Underwriting—Commissions and Discounts”] and the information in the [second] and [third] paragraphs under the heading [“Underwriting—Price Stabilization, Short Positions and Penalty Bids,”] in each case contained in the Prospectus (collectively, the “Underwriter Information”).

(iii) Issuer Free Writing Prospectuses. No Issuer Free Writing Prospectus conflicts or will conflict with the information contained in the Registration Statement or the Prospectus, and any preliminary or other prospectus deemed to be a part thereof that has not been superseded or modified. The Company has made available a Bona Fide Electronic Road Show in compliance with Rule 433(d)(8)(ii) such that no filing of any “road show” (as defined in Rule 433(h)) is required in connection with the offering of the Offered ADSs. Any Issuer Free Writing Prospectus that the Company is required to file pursuant to Rule 433(d) under the Securities Act has been, or will be, filed with the Commission in accordance with the requirements of the 1933 Act and the applicable rules and regulations of the Commission thereunder. Each Issuer Free Writing Prospectus that the Company has filed, or is required to file, pursuant to Rule 433(d) under the 1933 Act or that was prepared by or behalf of or used or referred to by the Company complies or will comply in all material respects with the requirements of the 1933 Act and the applicable rules and regulations of the Commission thereunder. Except for the Issuer Free Writing Prospectuses, if any, identified in Schedule B-2 hereto, and electronic road shows, if any, each furnished to the Underwriters before first use, the Company has not prepared, used or referred to, and will not, without the prior consent of the Representatives, prepare, use or refer to, any Issuer free writing prospectus.

(iv) Testing-the-Waters Materials. The Company (A) has not engaged in any Testing-the-Waters Communication other than Testing-the-Waters Communications with the consent of

the Representatives with entities that are qualified institutional buyers within the meaning of Rule 144A under the 1933 Act or institutions that are accredited investors within the meaning of Rule 501 under the 1933 Act and (B) has not authorized anyone other than the Representatives to engage in Testing-the-Waters Communications. The Company reconfirms that the Representatives have been authorized to act on its behalf in undertaking Testing-the-Waters Communications. The Company has not distributed any Written Testing-the-Waters Communications other than those listed on Schedule B-3 hereto.

(v) Company Not Ineligible Issuer. At the time of filing the Registration Statement, the ADS Registration Statement and any post-effective amendments thereto, at the earliest time thereafter that the Company or another offering participant made a bona fide offer (within the meaning of Rule 164(h)(2) of the 1933 Act Regulations) of the Offered ADSs and at the date hereof, the Company was not and is not an “ineligible issuer,” as defined in Rule 405, without taking account of any determination by the Commission pursuant to Rule 405 that it is not necessary that the Company be considered an ineligible issuer.

(vi) Emerging Growth Company Status. From the time of the initial confidential submission of the Registration Statement to the Commission (or, if earlier, the first date on which the Company engaged directly or through any Person authorized to act on its behalf in any Testing-the-Waters Communication) through the date hereof, the Company has been and is an “emerging growth company,” as defined in Section 2(a) of the 1933 Act (an “Emerging Growth Company”).

(vii) Foreign Private Issuer. The Company is a “foreign private issuer” within the meaning of Rule 405 under the 1933 Act.

(viii) Independent Accountants. The accountants who certified the financial statements and supporting schedules included in the Registration Statement, the General Disclosure Package and the Prospectus are independent public accountants as required by the 1933 Act, the 1933 Act Regulations and the Public Company Accounting Oversight Board (United States).

(ix) Financial Statements. The financial statements of the Company included in the Registration Statement, the General Disclosure Package and the Prospectus, together with the related schedules and notes, comply as to form in all material respects with the requirements of Regulation S-X under the 1933 Act and present fairly, in all material respects, the financial position of the Company at the dates indicated and the statement of operations, stockholders’ equity and cash flows of the Company for the periods specified; said financial statements have been prepared in conformity with International Financial Reporting Standards (“IFRS”) as issued by the International Accounting Standards Board applied on a consistent basis throughout the periods involved. The supporting schedules included in the Registration Statement, the General Disclosure Package and the Prospectus present fairly, in all material respects and in accordance with IFRS, the information required to be stated therein. The selected financial data and the summary financial information included in the Registration Statement, the General Disclosure Package and the Prospectus present fairly, in all material respects, the information shown therein and have been compiled on a basis consistent with that of the audited financial statements included therein. Except as included therein, no historical or pro forma financial statements or supporting schedules are required to be included or incorporated by reference in the Registration Statement, the General Disclosure Package or the Prospectus under the 1933 Act or the 1933 Act Regulations.

(x) No Material Adverse Change in Business. Except as otherwise stated therein, since the respective dates as of which information is given in the Registration Statement, the General Disclosure Package or the Prospectus, (A) there has been no material adverse change in the condition, financial or otherwise, or in the earnings, business affairs or business prospects of the Company, whether or not arising in the ordinary course of business (a “Material Adverse Effect”), (B) there have been no transactions entered into by the Company, other than those in the ordinary course of business, which are material with respect to the Company, (C) there have been no material liabilities or obligations, direct or contingent, entered into by the Company and (D) there has been no dividend or distribution of any kind declared, paid or made by the Company on any class of its capital stock.

(xi) Good Standing of the Company. The Company has been duly organized and is validly existing as a société anonyme in good standing under the laws of France; the Company has corporate power and authority to own, lease and operate its properties and to conduct its business as described in the Registration Statement, the General Disclosure Package and the Prospectus and to enter into and perform its obligations under this Agreement; and the Company is duly qualified as a foreign corporation to transact business and is in good standing in each other jurisdiction in which such qualification is required, whether by reason of the ownership or leasing of property or the conduct of business, except where the failure to be so qualified or to be in good standing would not result in a Material Adverse Effect.

(xii) Capitalization. The authorized, issued and outstanding shares of capital stock of the Company are as set forth in the Registration Statement, the General Disclosure Package and the Prospectus in the column entitled “Actual” under the caption “Capitalization” (except for subsequent issuances, if any, (A) pursuant to this Agreement, (B) pursuant to reservations, agreements or employee benefit plans referred to in the Registration Statement, the General Disclosure Package and the Prospectus or (C) pursuant to the exercise of convertible securities, options, free shares (actions gratuities) or share warrants (bons de souscription d’actions) or share warrants for founders (bons de souscription de parts de créateurs d’entreprise) referred to in the Registration Statement, the General Disclosure Package and the Prospectus). The outstanding shares of capital stock of the Company have been duly authorized and validly issued and are fully paid and non-assessable. None of the outstanding shares of capital stock of the Company were issued in violation of preemptive rights (droit préférentiel de souscription), priority rights (délai de priorité) or other similar rights of any securityholder of the Company.

(xiii) The holders of outstanding Ordinary Shares, as described in the Registration Statement, the General Disclosure Package and the Prospectus, are not entitled to preemptive rights (droit préférentiel de souscription), priority rights (délai de priorité) or other similar rights to acquire the Shares or the Offered ADSs that have not been waived with respect to the offering of the Offered ADSs in accordance with their terms and all applicable laws; there are no outstanding share warrants (bons de souscription d’actions) or share warrants for founders (bons de souscription de parts de créateurs d’entreprise) or securities convertible into, or exchangeable for, or warrants, rights or options to purchase from the Company, or obligations of the Company to issue, Ordinary Shares or any other class of share capital of the Company, except in each case as set forth in the Registration Statement, the General Disclosure Package or the Prospectus under the captions “Description of Share Capital,” “Executive Compensation—Equity Incentive” and “Related Party Transactions.” Subject to the payment of the purchase price for each Share and the issuing of a certificate acknowledging such payment by the transfer agent (certificat du dépositaire) in accordance with article L.225-146 of the French Commercial Code (code de commerce), the Shares, will be validly issued, fully paid and may be freely deposited by the Company with the Depositary against issuance of ADRs evidencing Offered ADSs. The Offered

ADSs, when issued and delivered against payment therefor, will be freely transferable by the Company to or for the account of the several Underwriters; and there are no restrictions on subsequent transfers of the Shares or the Offered ADSs under the laws of France or the United States except as described in the Registration Statement, the General Disclosure Package and the Prospectus.

(xiv) Sales, Issuances or Distributions of Capital Stock. Except as set forth in the Registration Statement, the General Disclosure Package and the Prospectus, the Company has not sold, issued or distributed any shares of capital stock during the six-month period preceding the date hereof, including any sales pursuant to Rule 144A under, or Regulation D or Regulation S of, the 1933 Act, other than shares issued pursuant to employee benefit plans, qualified stock option plans or other employee compensation plans or pursuant to outstanding options, rights or warrants.

(xv) Authorization of this Agreement. This Agreement has been duly authorized, executed and delivered by the Company.

(xvi) Authorization and Description of Securities. The Securities to be purchased by the Underwriters from the Company have been duly authorized by the Company for issuance and sale to the Underwriters pursuant to this Agreement and, when issued and delivered by the Company pursuant to this Agreement against payment of the consideration set forth herein, will be validly issued and fully paid and non-assessable; and the issuance of the Securities is not subject to preemptive rights (droit préférentiel de souscription), priority rights (délai de priorité) or other similar rights of any securityholder of the Company that have not been waived with respect to the offering of the Offered ADSs in accordance with their terms and all applicable laws. The Securities conform to all statements relating thereto contained in the Registration Statement, the General Disclosure Package and the Prospectus and such description conforms to the rights set forth in the instruments defining the same. No holder of Securities will be subject to personal liability by reason of being such a holder.

(xvii) Authorization of Deposit Agreement. The Deposit Agreement has been duly authorized, and when executed and delivered by the Company will, assuming due authorization, execution and delivery by the Depositary, constitute a valid and legally binding obligation of the Company, enforceable in accordance with its terms, subject, as to enforceability, to bankruptcy, insolvency, reorganization, moratorium and similar laws of general applicability relating to or affecting creditors’ rights and to general equity principles; upon due issuance by the Depositary of the ADRs evidencing the Offered ADSs against the deposit of the underlying Shares in respect thereof in accordance with the provisions of the Deposit Agreement, such Offered ADSs and ADRs will be duly and validly issued, and the persons in whose names the Offered ADSs and ADRs are registered will be entitled to the rights specified therein, respectively, and in the Deposit Agreement; and the Deposit Agreement and the ADRs conform in all material respects to the descriptions thereof contained in the Registration Statement, the General Disclosure Package and the Prospectus. There has been no change in the Company’s agreement with the Depositary in connection with any pre-release of the Company’s ADRs and no such change is currently contemplated.

(xviii) Registration Rights. There are no persons with registration rights or other similar rights to have any securities registered for sale pursuant to the Registration Statement or otherwise registered for sale or sold by the Company under the 1933 Act pursuant to this Agreement, other than those rights that have been disclosed in the Registration Statement, the General Disclosure Package and the Prospectus and have been waived.

(xix) Absence of Violations, Defaults and Conflicts. The Company is not (A) in violation of its charter, by-laws or similar organizational document, (B) in default in the performance or observance of any obligation, agreement, covenant or condition contained in any contract, indenture, mortgage, deed of trust, loan or credit agreement, note, lease or other agreement or instrument to which the Company is a party or by which it or any of them may be bound or to which any of the properties or assets of the Company is subject (collectively, “Agreements and Instruments”), except for such defaults that would not, singly or in the aggregate, result in a Material Adverse Effect, or (C) in violation of any applicable law, statute, rule, regulation, judgment, order, writ or decree of any arbitrator, court, governmental body, regulatory body, administrative agency or other authority, body or agency having jurisdiction over the Company or any of their respective properties, assets or operations (each, a “Governmental Entity”), except for such violations that would not, singly or in the aggregate, result in a Material Adverse Effect. The execution, delivery and performance of this Agreement and the Deposit Agreement and the consummation of the transactions contemplated herein or therein and in the Registration Statement, the General Disclosure Package and the Prospectus (including the issuance and sale of the Securities and deposit with the Depositary of the Shares represented by the Offered ADSs and the use of the proceeds from the sale of the Securities as described therein under the caption “Use of Proceeds”) and compliance by the Company with its obligations hereunder have been duly authorized by all necessary corporate action and do not and will not, whether with or without the giving of notice or passage of time or both, conflict with or constitute a breach of, or default or Repayment Event (as defined below) under, or result in the creation or imposition of any lien, charge or encumbrance upon any properties or assets of the Company pursuant to, the Agreements and Instruments (except for such conflicts, breaches, defaults or Repayment Events or liens, charges or encumbrances that would not, singly or in the aggregate, result in a Material Adverse Effect), nor will such action result in any violation of the provisions of the charter, by-laws or similar organizational document of the Company or any law, statute, rule, regulation, judgment, order, writ or decree of any Governmental Entity. As used herein, a “Repayment Event” means any event or condition which gives the holder of any note, debenture or other evidence of indebtedness (or any person acting on such holder’s behalf) the right to require the repurchase, redemption or repayment of all or a portion of such indebtedness by the Company.

(xx) Listing. The ADSs (and the underlying Shares) have been approved for listing on the NASDAQ Global Market, subject to notice of issuance.

(xxi) Absence of Labor Dispute. No labor dispute with the employees of the Company exists or, to the knowledge of the Company, is imminent, and the Company is not aware of any existing or imminent labor disturbance by the employees of any of its principal suppliers, manufacturers, customers or contractors, which, in either case, would result in a Material Adverse Effect.

(xxii) Absence of Proceedings. Except as disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, there is no action, suit, proceeding, inquiry or investigation before or brought by any Governmental Entity (including, without limitation, any action, suit proceeding, inquiry or investigation before or brought by the U.S. Food and Drug Administration (the “FDA”), the European Commission or the European Medicines Agency (the “EMA”)) now pending or, to the knowledge of the Company, threatened, against or affecting the Company, which would reasonably be expected to result in a Material Adverse Effect, or which would reasonably be expected to materially and adversely affect their respective properties or assets or the consummation of the transactions contemplated in this Agreement or the performance by the Company of its obligations hereunder; and the aggregate of all pending legal

or governmental proceedings to which the Company is a party or of which any of their respective properties or assets is the subject which are not described in the Registration Statement, the General Disclosure Package and the Prospectus, including ordinary routine litigation incidental to the business, would not reasonably be expected to result in a Material Adverse Effect.

(xxiii) Accuracy of Exhibits. There are no contracts or documents which are required to be described in the Registration Statement, the General Disclosure Package or the Prospectus or to be filed as exhibits to the Registration Statement which have not been so described and filed as required.

(xxiv) Regulatory Statements. The statements made in the preliminary prospectus under the captions “Business—Government Regulation” and “Risk Factors—Risks Related to the Discovery and Development and Regulatory Approval of Our Product Candidates,” insofar as they purport to constitute summaries of the terms of statutes, rules or regulations, legal or governmental proceedings or contracts and other documents referred to therein, constitute accurate summaries of the terms of such statutes, rules and regulations, legal and governmental proceedings and contracts and other documents in all material respects.

(xxv) Relationships. No relationship, direct or indirect, exists between or among the Company, on the one hand, and the directors, officers, shareholders, customers or suppliers of the Company, on the other hand, that is required to be described in the preliminary prospectus which is not so described.

(xxvi) Absence of Further Requirements. No filing with, or authorization, approval, consent, license, order, registration, qualification or decree of, any Governmental Entity is necessary or required for the performance by the Company of its obligations hereunder, in connection with the offering, issuance or sale of the Offered ADSs or the issuance and deposit with the Depositary of the Shares hereunder or the consummation of the transactions contemplated by this Agreement, except such as have been already obtained or as may be required under the 1933 Act, the 1933 Act Regulations, the rules of the NASDAQ Global Market, state securities laws or the rules of FINRA.

(xxvii) Title to Property. The Company does not own any real property; all real property and other property material to its business held under lease or sublease by the Company is held by it under valid, subsisting and enforceable leases or subleases, as the case may be, with such exceptions as are not material and do not materially interfere with the use made or proposed to be made of such property by the Company; and the Company has not had any notice of any claim of any sort that has been asserted by anyone adverse to the rights of the Company under any of the leases or subleases mentioned above or affecting or questioning the rights of the Company to the continued possession of the leased or subleased premises under any such lease or sublease except for such claims which, if successfully asserted against the Company, would not, individually or in the aggregate, reasonably be expected to result in a Material Adverse Effect.

(xxviii) Title to Intellectual Property. Except as described or disclosed in the Registration Statement, the General Disclosure Package and the Prospectus or as would not, singly or in the aggregate, result in a Material Adverse Effect: (A) the Company owns or has valid, binding and enforceable licenses or other rights under the patents, patent applications, patent rights, licenses, inventions, copyrights, know-how (including trade secrets and other unpatented and/or unpatentable proprietary or confidential information, systems or procedures), trademarks, service marks, trade names or other intellectual property necessary for, or used in the conduct, or the proposed conduct, of the business of the Company in the manner described in the Registration

Statement, the General Disclosure Package and the Prospectus (collectively, the “Intellectual Property”); (B) the patents, trademarks and copyrights, if any, included within the Intellectual Property are valid, enforceable and subsisting; and (C)(1) the Company is not obligated to pay a royalty, grant a license to or provide other consideration to any third party in connection with the Intellectual Property; (2) the Company has not received any notice of any claim of infringement, misappropriation or conflict with any asserted rights of others with respect to any of the Company’s drug candidates, processes or Intellectual Property; (3) to the knowledge of the Company, neither the sale nor use of any of the discoveries, inventions, drug candidates or processes of the Company referred to in the Registration Statement, the General Disclosure Package or the Prospectus, will infringe, misappropriate or violate any right or valid patent claim of any third party; and (4) no third party has any ownership right in or to any Intellectual Property that is owned by the Company, other than any co-owner of any patent constituting Intellectual Property who is listed on the records of the U.S. Patent and Trademark Office (the “USPTO”) and any co-owner of any patent application constituting Intellectual Property who is named in such patent application, and, to the knowledge of the Company, no third party has any ownership right in or to any Intellectual Property in any field of use that is exclusively licensed to the Company, other than any licensor to the Company of such Intellectual Property.

(xxix) Compliance with Regulatory Laws. Except as described in the Registration Statement, the General Disclosure Package and the Prospectus, the Company: (A) is and at all times has been in material compliance with all statutes, rules or regulations of the FDA, the United States Department of Agriculture, the United States Department of Health and Human Services, the European Commission, the EMA, the Competent Authorities of the Member States of the European Economic Area or other comparable federal, state, local or foreign governmental and regulatory authorities (collectively, the “Regulatory Authorities”) applicable to the ownership, testing, development, manufacture, packaging, processing, use, distribution, marketing, labeling, promotion, sale, offer for sale, storage, import, export or disposal of any product or product candidate under development, manufactured or distributed by the Company (“Applicable Laws”); (B) has not received any FDA Form 483, notice of adverse finding, warning letter, untitled letter or other correspondence or notice from the FDA or any other Regulatory Authority alleging or asserting material noncompliance with any Applicable Laws or any permits, licenses, franchises, exemptions, approvals, certifications, clearances, consents and other authorizations issued by Regulatory Authorities necessary to conduct the business now operated by the Company (collectively, “Governmental Licenses”); (C) possesses all material Governmental Licenses and such Governmental Licenses are valid and in full force and effect, except where the invalidity of such Governmental Licenses or the failure of such Governmental Licenses to be in full force and effect would not, singly or in the aggregate, result in a Material Adverse Effect, and the Company is not in material violation of any term of any such Governmental Licenses; (D) has not received notice of any claim, action, suit, proceeding, hearing, enforcement, investigation, arbitration or other action from any Regulatory Authority or third party alleging that any product operation or activity is in material violation of any Applicable Laws or Governmental Licenses and has no knowledge that any Regulatory Authority or third party is considering any such claim, litigation, arbitration, action, suit, investigation or proceeding; (E) has not received notice that any Regulatory Authority has taken, is taking or intends to take action to suspend, modify or revoke any material Governmental Licenses which, singly or in the aggregate, if the subject of an unfavorable decision, ruling or finding, would result in a Material Adverse Effect, and has no knowledge that any Regulatory Authority is considering such action; and (F) has filed, obtained, maintained or submitted all material reports, documents, forms, notices, applications, records, claims, submissions and supplements or amendments as required by any Applicable Laws or Governmental Licenses and that all such reports, documents, forms, notices, applications, records, claims, submissions and supplements or amendments were materially complete and correct on the date filed (or were corrected or supplemented by a subsequent submission).

(xxx) Environmental Laws. Except as described in the Registration Statement, the General Disclosure Package and the Prospectus or as would not, singly or in the aggregate, reasonably be expected to result in a Material Adverse Effect, (A) the Company is not in violation of any applicable federal, state, local or foreign statute, law, rule, regulation, ordinance, code, policy or rule of common law or any judicial or administrative interpretation thereof, including any judicial or administrative order, consent, decree or judgment, relating to pollution or protection of human health, the environment (including, without limitation, ambient air, surface water, groundwater, land surface or subsurface strata) or wildlife, including, without limitation, laws and regulations relating to the release or threatened release of chemicals, pollutants, contaminants, wastes, toxic substances, hazardous substances, petroleum or petroleum products, asbestos-containing materials or mold (collectively, “Hazardous Materials”) or to the manufacture, processing, distribution, use, treatment, storage, disposal, transport or handling of Hazardous Materials (collectively, “Environmental Laws”); (B) the Company has all permits, authorizations and approvals required under any applicable Environmental Laws and is in compliance with their requirements; (C) there are no pending or, to the knowledge of the Company, threatened administrative, regulatory or judicial actions, suits, demands, demand letters, claims, liens, notices of noncompliance or violation, investigations or proceedings relating to any Environmental Law against the Company; and (D) there are no events or circumstances that would reasonably be expected to form the basis of an order for clean-up or remediation, or an action, suit or proceeding by any private party or Governmental Entity, against or affecting the Company relating to Hazardous Materials or any Environmental Laws.

(xxxi) Accounting Controls. The Company maintains effective internal control over financial reporting (as defined under Rule 13-a15 and 15d-15 under the 1934 Act Regulations) and a system of internal accounting controls sufficient to provide reasonable assurances that (A) transactions are executed in accordance with management’s general or specific authorization; (B) transactions are recorded as necessary to permit preparation of financial statements in conformity with IFRS and to maintain accountability for assets; (C) access to assets is permitted only in accordance with management’s general or specific authorization; and (D) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences. Except as described in the Registration Statement, the General Disclosure Package and the Prospectus, since the end of the Company’s most recent audited fiscal year, there has been (i) no material weakness in the Company’s internal control over financial reporting (whether or not remediated) and (ii) no change in the Company’s internal control over financial reporting that has materially adversely affected, or is reasonably likely to materially adversely affect, the Company’s internal control over financial reporting.

(xxxii) Compliance with the ▇▇▇▇▇▇▇▇-▇▇▇▇▇ Act. The Company has taken all necessary actions to ensure that, upon the effectiveness of the Registration Statement, it will be in compliance with all applicable provisions of the ▇▇▇▇▇▇▇▇-▇▇▇▇▇ Act of 2002 and all rules and regulations promulgated thereunder or implementing the provisions thereof (the “▇▇▇▇▇▇▇▇-▇▇▇▇▇ Act”) that are then in effect and with which the Company is required to comply as of the effectiveness of the Registration Statement, and is actively taking steps to ensure that it will be in compliance with other provisions of the ▇▇▇▇▇▇▇▇-▇▇▇▇▇ Act not currently in effect, upon the effectiveness of such provisions, or which will become applicable to the Company at all times after the effectiveness of the Registration Statement.

(xxxiii) Tests and Preclinical and Clinical Trials. The studies, tests and preclinical and clinical trials conducted by or, to the Company’s knowledge, on behalf of the Company were and, if still ongoing, are being conducted in all material respects in accordance with experimental protocols, procedures and controls pursuant to accepted professional scientific standards and all Governmental Licenses and Applicable Laws, including, without limitation, the Federal Food, Drug and Cosmetic Act and the rules and regulations promulgated thereunder and the rules and regulations of the EMA; the descriptions of the results of such studies, tests and trials contained in the Registration Statement, the General Disclosure Package and the Prospectus are, to the Company’s knowledge, accurate and complete in all material respects and fairly present the data derived from such studies, tests and trials; except to the extent disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, the Company is not aware of any studies, tests or trials, the results of which the Company believes reasonably call into question the study, test or trial results described or referred to in the Registration Statement, the General Disclosure Package and the Prospectus when viewed in the context in which such results are described and the clinical state of development; and, except to the extent disclosed in the Registration Statement, the General Disclosure Package or the Prospectus, the Company has not received any notices or correspondence from the FDA or any Governmental Entity requiring the termination or suspension of any studies, tests or preclinical or clinical trials conducted by or on behalf of the Company, other than ordinary course communications with respect to modifications in connection with the design and implementation of such trials, copies of which communications have been made available to you.

(xxxiv) Payment of Taxes. All tax returns of the Company required by law to be filed have been filed or appropriate extensions have been requested pursuant to applicable foreign, state, local or other law except insofar as the failure to file such returns or request such extensions would not result in a Material Adverse Effect, and have paid all taxes due pursuant to such returns or pursuant to any assessment received by the Company, except for such taxes, if any, as are being contested in good faith and as to which adequate reserves have been established by the Company. The charges, accruals and reserves on the books of the Company in respect of any income and corporation tax liability for any years not finally determined are adequate to meet any assessments or re-assessments for additional income tax for any years not finally determined, except to the extent of any inadequacy that would not result in a Material Adverse Effect.

(xxxv) Insurance. The Company carries or is entitled to the benefits of insurance, with financially sound and reputable insurers, in such amounts and covering such risks as is prudent and customary in the businesses in which it is engaged and is generally maintained by companies of established repute engaged in the same or similar business, and all such insurance is in full force and effect. The Company has no reason to believe that it will not be able (A) to renew its existing insurance coverage as and when such policies expire or (B) to obtain comparable coverage from similar institutions as may be necessary or appropriate to conduct its business as now conducted and at a cost that would not result in a Material Adverse Effect. The Company has not been denied any insurance coverage which it has sought or for which it has applied.

(xxxvi) Investment Company Act. The Company is not required, and upon the issuance and sale of the Securities and the deposit with the Depositary of the Shares as herein contemplated and the application of the net proceeds therefrom as described in the Registration Statement, the General Disclosure Package and the Prospectus will not be required, to register as an “investment company” under the Investment Company Act of 1940, as amended (the “1940 Act”).

(xxxvii) Absence of Manipulation. Neither the Company nor any Affiliated Purchaser (as defined in Rule 100 of Regulation M under the ▇▇▇▇ ▇▇▇) of the Company has taken, nor will the Company or any Affiliated Purchaser of the Company take, directly or indirectly, any action which is designed, or would reasonably be expected, to cause or result in, or which constitutes, the stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Securities or to result in a violation of Regulation M under the 1934 Act.

(xxxviii) Unlawful Payments. Neither the Company nor, to the knowledge of the Company, any director, officer, employee, agent, affiliate or any other person acting on behalf of the Company has (A) used any funds for any unlawful contribution, gift, entertainment or other unlawful expense relating to political activity; (B) made or taken an act in furtherance of an offer, promise or authorization of any direct or indirect unlawful payment or benefit to any foreign or domestic government or regulatory official or employee, including of any government-owned or controlled entity or of a public international organization, or any person acting in an official capacity for or on behalf of any of the foregoing, or any political party or party official or candidate for political office; (C) violated or is in violation of any provision of the Foreign Corrupt Practices Act of 1977, as amended, or any applicable law or regulation implementing the OECD Convention on Combating Bribery of Foreign Public Officials in International Business Transactions, or committed an offence under the ▇▇▇▇▇▇▇ ▇▇▇ ▇▇▇▇ of the United Kingdom, or any other applicable anti-bribery or anti-corruption laws; or (D) made, offered, agreed, requested or taken an act in furtherance of any unlawful bribe or other unlawful benefit, including, without limitation, any rebate, payoff, influence payment, kickback or other unlawful or improper payment or benefit. The Company has instituted, and maintains and enforces, policies and procedures reasonably designed to promote and achieve compliance with all applicable anti-bribery and anti-corruption laws.

(xxxix) Anti-Money Laundering Laws. The operations of the Company are and have been conducted at all times in material compliance with applicable financial recordkeeping and reporting requirements, including those of the Currency and Foreign Transactions Reporting Act of 1970, as amended, the applicable money laundering statutes of all jurisdictions where the Company conducts business, the rules and regulations thereunder and any related or similar rules, regulations or guidelines issued, administered or enforced by any governmental or regulatory agency (collectively, the “Anti-Money Laundering Laws”) and no action, suit or proceeding by or before any court or governmental or regulatory agency, authority or body or any arbitrator involving the Company with respect to the Anti-Money Laundering Laws is pending or, to the knowledge of the Company, threatened.

(xl) Sanctions Laws. Neither the Company nor, to the knowledge of the Company, any director, officer, employee agent, affiliate or any other person acting on behalf of the Company is 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 United Nations Security Council, the European Union, Her Majesty’s Treasury or other relevant sanctions authority (collectively, “Sanctions”), nor is the Company located, organized or resident in a country or territory that is the subject or the target of Sanctions, including, without limitation, Cuba, Iran, Libya, North Korea, Sudan and Syria (each, a “Sanctioned Country”); and the Company will not directly or indirectly use the proceeds of the offering of the Securities hereunder, or lend, contribute or otherwise make available such proceeds to any subsidiary, joint venture partner or other person or entity (A) to fund or facilitate any activities of or business with any person that, at the time of such funding or facilitation, is the subject or the target of

Sanctions, (B) to fund or facilitate any activities of or business in any Sanctioned Country or (C) in any other manner that will result in a violation by any person (including any person participating in the transaction, whether as underwriter, advisor, investor or otherwise) of Sanctions.

(xli) Lending Relationship. Except as disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, the Company (i) does not have any material lending or other relationship with any bank or lending affiliate of any Underwriter and (ii) does not intend to use any of the proceeds from the sale of the Securities to repay any outstanding debt owed to any affiliate of any Underwriter.

(xlii) Statistical and Market-Related Data. Any statistical and market-related data included in the Registration Statement, the General Disclosure Package or the Prospectus are based on or derived from sources that the Company believes, after reasonable inquiry, to be reliable and accurate and, to the extent required, the Company has obtained the written consent to the use of such data from such sources.

(xliii) No Rated Securities. The Company has no debt securities or preferred stock that are rated by any “nationally recognized statistical rating organization” (as that term is defined by the Commission for purposes of Rule 436(g)(2) under the 1933 Act).

(b) Officer’s Certificates. Any certificate signed by any officer of the Company delivered to the Representatives or to counsel for the Underwriters shall be deemed a representation and warranty by the Company to each Underwriter as to the matters covered thereby.

SECTION 2. Sale and Delivery to Underwriters; Closing.

(a) Initial ADSs. On the basis of the representations and warranties herein contained and subject to the terms and conditions herein set forth, the Company agrees to sell to each Underwriter, severally and not jointly, and each Underwriter, severally and not jointly, agrees to purchase from the Company, at the price per Initial Share to be delivered in the form of an Initial ADS set forth in Schedule A, that number of Initial Shares (to be delivered in the form of Initial ADSs) set forth in Schedule A opposite the name of such Underwriter, plus any additional number of Initial Shares (to be delivered in the form of Initial ADSs) which such Underwriter may become obligated to purchase pursuant to the provisions of Section 10 hereof, subject, in each case, to such adjustments among the Underwriters as the Representatives in their sole discretion shall make to eliminate any sales or purchases of fractional ADSs.

(b) Option ADSs. In addition, on the basis of the representations and warranties herein contained and subject to the terms and conditions herein set forth, the Company hereby grants an option to the Underwriters, severally and not jointly, to purchase up to an additional [●] Option Shares (to be delivered in the form of Option ADSs), at the price per Option Share (to be delivered in the form of an Option ADS) set forth in Schedule A. The option hereby granted may be exercised for 30 calendar days after the date hereof and may be exercised in whole or in part at any time upon notice by the Representatives to the Company setting forth the number of Option Shares (to be delivered in the form of Option ADSs) as to which the several Underwriters are then exercising the option and the time and date of payment and delivery for such Option Shares (to be delivered in the form of Option ADSs). Any such time and date of delivery (a “Date of Delivery”) shall be determined by the Representatives, but any Date of Delivery after the Closing Time (as defined below) shall not be later than seven full business days, nor earlier than two full business days (unless delivery of the Option Shares is to occur concurrently with delivery of the Initial Shares at the Closing Time), after the exercise of said option, except as otherwise

agreed by the Representatives and the Company, nor in any event prior to the Closing Time. If the option is exercised as to all or any portion of the Option Shares (to be delivered in the form of Option ADSs), each of the Underwriters, acting severally and not jointly, will purchase that proportion of the total number of Option Shares (to be delivered in the form of Option ADSs) then being purchased which the number of Initial Shares (delivered in the form of Initial ADSs) set forth in Schedule A opposite the name of such Underwriter bears to the total number of Initial Shares (delivered in the form of Initial ADSs), subject, in each case, to such adjustments as the Representatives in their sole discretion shall make to eliminate any sales or purchases of fractional ADSs.

(c) Payment. Payment of the purchase price for, and delivery of the Initial Shares (to be delivered in the form of Initial ADSs) shall be made at the offices of Shearman & Sterling LLP, ▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇, or at such other place as shall be agreed upon by the Representatives and the Company, at 9:00 A.M., New York City time, on the third (fourth, if the pricing occurs after 4:30 P.M., New York City time, on any given day) business day after the date hereof (unless postponed in accordance with the provisions of Section 10), or such other time not later than ten business days after such date as shall be agreed upon by the Representatives and the Company (such time and date of payment and delivery being herein called “Closing Time”). Delivery of the Initial Shares (to be delivered in the form of Initial ADSs) at the Closing Time shall be made through the facilities of The Depository Trust Company (“DTC”), unless the Representatives shall otherwise instruct.

In addition, in the event that any or all of the Option Shares (to be delivered in the form of Option ADSs) are purchased by the Underwriters, payment of the purchase price for, and delivery of such Option Shares (to be delivered in the form of Option ADSs) shall be made at the above-mentioned offices, or at such other place as shall be agreed upon by the Representatives and the Company, on each Date of Delivery as specified in the notice from the Representatives to the Company. Delivery of the Option Shares (to be delivered in the form of Option ADSs) on each such Date of Delivery shall be made through the facilities of DTC, unless the Representatives shall otherwise instruct.

Payment for the Shares shall be made to the Company by wire transfer of immediately available funds to a bank account entitled “augmentation de capital” designated by the Company. Subject to the issuing of a certificate acknowledging such payment by the transfer agent (certificat du dépositaire) in accordance with article L.225-146 of the French Commercial Code (code de commerce), the Shares will be created and may be freely deposited by the Company with the Depositary against delivery by the Depositary to the Representatives for the respective accounts of the Underwriters of certificates or security entitlements for the Securities to be purchased by them. It is understood that each Underwriter has authorized the Representatives, for their accounts, to accept delivery of, receipt for, the Initial ADSs and the Option ADSs, if any, and make payment of the purchase price for, the Initial Shares (to be delivered in the form of Initial ADSs) and the Option Shares (to be delivered in the form of Option ADSs), if any, which it has agreed to purchase. Each of Leerink and Evercore, individually and not as representatives of the Underwriters, may (but shall not be obligated to) make payment of the purchase price for the Initial Shares (to be delivered in the form of Initial ADSs) or the Option Shares (to be delivered in the form of Option ADSs), if any, to be purchased by any Underwriter whose funds have not been received by the Closing Time or the relevant Date of Delivery, as the case may be, but such payment shall not relieve such Underwriter from its obligations hereunder.

(d) Registration. The ADRs evidencing the Initial ADSs and the Option ADSs, if any, shall be registered in such names and in such denominations as the Representatives may request not less than one full business day prior to the Closing Time or such Date of Delivery, as the case may be.

SECTION 3. Covenants of the Company. The Company covenants with each Underwriter as follows:

(a) Compliance with Securities Regulations and Commission Requests. The Company, subject to Section 3(b), will comply with the requirements of Rule 430A, and will notify the Representatives as soon as practicable, and confirm the notice in writing (which may be in electronic form), (i) when any post-effective amendment to the Registration Statement or the ADS Registration Statement shall become effective or any amendment or supplement to the Prospectus (including any prospectus wrapper) shall have been filed, (ii) of the receipt of any comments from the Commission, (iii) of any request by the Commission for any amendment to the Registration Statement, the ADS Registration Statement or any amendment or supplement to the Prospectus or for additional information, (iv) of the issuance by the Commission of any stop order suspending the effectiveness of the Registration Statement, the ADS Registration Statement or any post-effective amendment or of any order preventing or suspending the use of any preliminary prospectus or the Prospectus, or of the suspension of the qualification of the Securities for offering or sale in any jurisdiction, or of the initiation or threatening of any proceedings for any of such purposes or of any examination pursuant to Section 8(d) or 8(e) of the 1933 Act concerning the Registration Statement or the ADS Registration Statement and (v) if the Company becomes the subject of a proceeding under Section 8A of the 1933 Act in connection with the offering of the Securities. The Company will effect all filings required under Rule 424(b), in the manner and within the time period required by Rule 424(b) (without reliance on Rule 424(b)(8)), and will take such steps as it deems necessary to ascertain promptly whether the form of prospectus transmitted for filing under Rule 424(b) was received for filing by the Commission and, in the event that it was not, it will promptly file such prospectus. The Company will make every reasonable effort to prevent the issuance of any stop order, prevention or suspension and, if any such order is issued, to obtain the lifting thereof at the earliest possible moment.

(b) Continued Compliance with Securities Laws. The Company will comply with the 1933 Act and the 1933 Act Regulations so as to permit the completion of the distribution of the Offered ADSs as contemplated in this Agreement and in the Registration Statement, the General Disclosure Package and the Prospectus. If at any time when a prospectus relating to the Offered ADSs is (or, but for the exception afforded by Rule 172 of the 1933 Act Regulations (“Rule 172”), would be) required by the 1933 Act to be delivered in connection with sales of the Offered ADSs, any event shall occur or condition shall exist as a result of which it is necessary, in the opinion of counsel for the Underwriters or for the Company, to (i) amend the Registration Statement or the ADS Registration Statement in order that the Registration Statement or the ADS Registration Statement will not include 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, (ii) amend or supplement the General Disclosure Package or the Prospectus in order that the General Disclosure Package or the Prospectus, as the case may be, will not include any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein not misleading in the light of the circumstances existing at the time it is delivered to a purchaser or (iii) amend the Registration Statement or the ADS Registration Statement or amend or supplement the General Disclosure Package or the Prospectus, as the case may be, in order to comply with the requirements of the 1933 Act or the 1933 Act Regulations, the Company will promptly (A) give the Representatives notice of such event, (B) prepare any amendment or supplement as may be necessary to correct such untrue statement or omission or to make the Registration Statement, the ADS Registration Statement, the General Disclosure Package or the Prospectus comply with such requirements and, a reasonable amount of time prior to any proposed filing or use, furnish the Representatives with copies of any such amendment or supplement and (C) file with the Commission any such amendment or supplement; provided that the Company shall not file or use any such amendment or supplement to which the Representatives or counsel for the Underwriters shall reasonably object. The Company will furnish to the Underwriters such number of copies of such amendment or supplement as the Underwriters may reasonably request. The Company has given the Representatives notice of any filings made pursuant to the 1934 Act or the 1934 Act Regulations within 48 hours prior to the Applicable Time; the Company will give the Representatives notice of its intention to make any such filing from the Applicable Time to

the Closing Time and will furnish the Representatives with copies of any such documents a reasonable amount of time prior to such proposed filing, as the case may be, and will not file or use any such document to which the Representatives or counsel for the Underwriters shall reasonably object.

(c) Delivery of Registration Statements. The Company has furnished or will deliver to the Representatives and counsel for the Underwriters, without charge, signed copies of the Registration Statement, the ADS Registration Statement and the 1934 Act Registration Statement, each as originally filed and each amendment thereto (including exhibits filed therewith) and signed copies of all consents and certificates of experts, and will also deliver to the Representatives, without charge, a conformed copy of the Registration Statement as originally filed and each amendment to the Registration Statement (without exhibits) for each of the Underwriters. The copies of the Registration Statement, the ADS Registration Statement, the 1934 Act Registration Statement and each amendment thereto furnished to the Underwriters will be identical to the electronically transmitted copies thereof filed with the Commission pursuant to ▇▇▇▇▇, except to the extent permitted by Regulation S-T.

(d) Delivery of Prospectuses. The Company has delivered to each Underwriter, without charge, as many copies of each preliminary prospectus as such Underwriter reasonably requested, and the Company hereby consents to the use of such copies for purposes permitted by the 1933 Act. The Company will furnish to each Underwriter, without charge, during the period when a prospectus relating to the Offered ADSs is (or, but for the exception afforded by Rule 172, would be) required to be delivered under the 1933 Act (the “Prospectus Delivery Period”), such number of copies of the Prospectus (as amended or supplemented) as such Underwriter may reasonably request. The Prospectus and any amendments or supplements thereto furnished to the Underwriters will be identical to the electronically transmitted copies thereof filed with the Commission pursuant to ▇▇▇▇▇, except to the extent permitted by Regulation S-T.

(e) Blue Sky Qualifications. The Company will use its best efforts, in cooperation with the Underwriters, to qualify the Offered ADSs for offering and sale under the applicable securities laws of such states and other jurisdictions (domestic or foreign) as the Representatives may reasonably designate and to maintain such qualifications in effect so long as required to complete the distribution of the Offered ADSs; provided, however, that the Company shall not be obligated to file any general consent to service of process or to qualify as a foreign corporation or as a dealer in securities in any jurisdiction in which it is not so qualified or to subject itself to taxation in respect of doing business in any jurisdiction in which it is not otherwise so subject.

(f) Rule 158. The Company will timely file such reports pursuant to the 1934 Act as are necessary in order to make generally available to its securityholders as soon as practicable an earnings statement for the purposes of, and to provide to the Underwriters the benefits contemplated by, the last paragraph of Section 11(a) of the 1933 Act.

(g) Use of Proceeds. The Company will use the net proceeds received by it from the sale of the Securities in all material respects in the manner specified in the Registration Statement, the General Disclosure Package and the Prospectus under the heading “Use of Proceeds.”

(h) Listing. The Company will use its best efforts to effect and maintain the listing of the ADSs (and the underlying Shares) on the NASDAQ Global Market.

(i) Restriction on Sale of Securities. During a period of 180 days from the date of the Prospectus, the Company will not, without the prior written consent of the Representatives, (i) directly or indirectly, offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase or otherwise transfer or dispose of any

ADSs or Ordinary Shares or any securities convertible into or exercisable or exchangeable for ADSs or Ordinary Shares or file any registration statement under the 1933 Act with respect to any of the foregoing or (ii) enter into any swap or any other agreement or any transaction that transfers, in whole or in part, directly or indirectly, the economic consequence of ownership of the ADSs or Ordinary Shares, whether any such swap or transaction described in clause (i) or (ii) above is to be settled by delivery of ADSs or Ordinary Shares or other securities, in cash or otherwise. The foregoing sentence shall not apply to (A) the Securities to be sold under this Agreement and the Shares to be deposited with the Depositary in connection therewith; (B) any ADSs or Ordinary Shares issued by the Company upon the exercise of an option or warrant or the conversion of a security outstanding on the date hereof and referred to in the Registration Statement, the General Disclosure Package and the Prospectus; (C) any ADSs or Ordinary Shares issued, or share options, free shares (actions gratuites) and warrants to purchase ADSs or Ordinary Shares granted, pursuant to existing employee benefit plans of the Company referred to in the Registration Statement, the General Disclosure Package and the Prospectus; (D) any ADSs or Ordinary Shares issued pursuant to any existing non-employee director stock plan or dividend reinvestment plan referred to in the Registration Statement, the General Disclosure Package and the Prospectus; (E) the filing by the Company of any registration statement on Form S-8 or a successor form thereto; (F) any shares that may be issued by the Company due to increases in capital resulting from the capitalization of reserves, profits or premiums; or (G) any shares that may be issued by the Company due to increases in capital in exchange for contributions (not including cash), or that may be issued in connection with mergers.

(j) Lock-Up Release or Waiver. If the Representatives, in their sole discretion, agree to release or waive the restrictions set forth in a lock-up agreement described in Section 5(n) hereof for an officer or director of the Company and provide the Company with notice of the impending release or waiver at least three business days before the effective date of the release or waiver, the Company agrees to announce the impending release or waiver by a press release substantially in the form of Exhibit C hereto through a major news service at least two business days before the effective date of the release or waiver.

(k) Reporting Requirements. The Company, during the period when a Prospectus relating to the Offered ADSs is (or, but for the exception afforded by Rule 172, would be) required to be delivered under the 1933 Act, will file all documents required to be filed with the Commission pursuant to the 1934 Act within the time periods required by the 1934 Act and 1934 Act Regulations. Additionally, the Company shall report the use of proceeds from the issuance of the Securities as may be required under Rule 463 under the 1933 Act.

(l) Issuer Free Writing Prospectuses. The Company agrees that, unless it obtains the prior written consent of the Representatives, it will not make any offer relating to the Offered ADSs that would constitute an Issuer Free Writing Prospectus or that would otherwise constitute a “free writing prospectus,” or a portion thereof, required to be filed by the Company with the Commission or retained by the Company under Rule 433; provided that the Representatives will be deemed to have consented to the Issuer Free Writing Prospectuses listed on Schedule B-2 hereto and any “road show that is a written communication” within the meaning of Rule 433(d)(8)(i) that has been reviewed by the Representatives. The Company represents that it has treated or agrees that it will treat each such free writing prospectus consented to, or deemed consented to, by the Representatives as an “issuer free writing prospectus,” as defined in Rule 433, and that it has complied and will comply with the applicable requirements of Rule 433 with respect thereto, including timely filing with the Commission where required, legending and record keeping. If at any time following issuance of an Issuer Free Writing Prospectus there occurred or occurs an event or development as a result of which such Issuer Free Writing Prospectus conflicted or would conflict with the information contained in the Registration Statement, any preliminary prospectus or the Prospectus or included or would include an untrue statement of a material fact or omitted or would

omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances existing at that subsequent time, not misleading, the Company will promptly notify the Representatives and will promptly amend or supplement, at its own expense, such Issuer Free Writing Prospectus to eliminate or correct such conflict, untrue statement or omission.

(m) Deposit of Shares. The Company agrees, prior to each Date of Delivery, to deposit Shares with the Depositary in accordance with the provisions of the Deposit Agreement and otherwise to comply with the Deposit Agreement so that ADRs evidencing the applicable Offered ADSs will be issued by the Depositary against receipt of such Shares and delivered to the Underwriters at such Date of Delivery.

(n) Testing-the-Waters Materials. If at any time following the distribution of any Written Testing-the-Waters Communication there occurred or occurs an event or development as a result of which such Written Testing-the-Waters Communication included or would include an untrue statement of a material fact or omitted or would omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances existing at that subsequent time, not misleading, the Company will promptly notify the Representatives and will promptly amend or supplement, at its own expense, such Written Testing-the-Waters Communication to eliminate or correct such untrue statement or omission.

(o) Emerging Growth Company Status. The Company will promptly notify the Representatives if the Company ceases to be an Emerging Growth Company at any time prior to the later of (i) completion of the distribution of the Offered ADSs within the meaning of the 1933 Act and (ii) completion of the 180-day restricted period referred to in Section 3(i).

SECTION 4. Payment of Expenses.

(a) Expenses. The Company will pay or cause to be paid all expenses incident to the performance of its obligations under this Agreement, including (i) the preparation, printing and filing of the Registration Statement (including financial statements and exhibits) and the ADS Registration Statement as originally filed and each amendment thereto; (ii) the preparation, printing and delivery to the Underwriters of copies of each preliminary prospectus, each Issuer Free Writing Prospectus and the Prospectus and any amendments or supplements thereto and any costs associated with electronic delivery of any of the foregoing by the Underwriters to investors; (iii) the preparation, issuance and delivery of the ADRs evidencing the ADSs to the Underwriters, including any stock or other transfer taxes and any stamp or other duties payable upon the sale, issuance or delivery of the Securities to the Underwriters; (iv) the fees and disbursements of the Company’s counsel, accountants and other advisors; (v) the qualification of the Offered ADSs (and, if necessary, the underlying Shares) under securities laws in accordance with the provisions of Section 3(e) hereof, including filing fees and the reasonably incurred and duly documented fees and disbursements of counsel for the Underwriters in connection therewith and in connection with the preparation of a “Blue Sky Survey” and any supplement thereto; (vi) the fees and expenses of any transfer agent, registrar and/or depositary for the Securities; (vii) the costs and expenses of the Company relating to investor presentations on any “road show” undertaken in connection with the marketing of the Offered ADSs, including, without limitation, expenses associated with the production of road show slides and graphics, fees and expenses of any consultants engaged by the Company in connection with the road show presentations, travel and lodging expenses of the representatives and officers of the Company and any such consultants (provided that the travel and lodging expenses of any representative of the Underwriters shall be paid by the Underwriters), and the cost of aircraft and other transportation chartered in connection with the road show (provided that 50% of the cost of any chartered transportation in connection with the roadshow shall be paid by the Underwriters and the remaining 50% of such cost shall be paid by the Company); (viii) the filing fees incident to, and the reasonable fees and disbursements of counsel to the Underwriters in connection with, the review by FINRA of the terms of

the sale of the Securities, provided that the aggregate amount payable by the Company pursuant to clause (v) above and this clause (viii), excluding requisite filing fees, shall not exceed $50,000; (ix) the fees and expenses in connection with the preparation and filing of the registration statement on Form 8-A relating to the Ordinary Shares and the ADSs and the fees and expenses incurred in connection with the listing of the Offered ADSs (and the underlying Shares) on the NASDAQ Global Market; (x) the costs and expenses of qualifying the Securities for inclusion in the book-entry settlement system of DTC; and (xi) the reasonably incurred and duly documented costs and expenses (including, without limitation, any damages or other amounts payable in connection with legal or contractual liability, but without duplication of any such amounts paid pursuant to Section 6 hereof) associated with the reforming of any contracts for sale of the Securities made by the Underwriters caused by a breach of the representation contained in the third sentence of Section 1(a)(ii). Except as provided in clauses (v) and (viii) of this Section 4, the Underwriters shall pay the fees and disbursements of their own counsel in connection with the offering of the Securities. The aggregate amount of any reasonable out-of-pocket expenses paid to Underwriters in connection with the offering of the Securities shall not exceed $20,000 (excluding the payment of reasonable fees and disbursements of counsel pursuant to clauses (v) and (viii)).

(b) Termination of Agreement. If this Agreement is terminated by the Representatives in accordance with the provisions of Section 5, Section 9(a)(i) or 9(a)(iii) or Section 10 hereof, the Company shall reimburse the Underwriters for all of their reasonably incurred and duly documented out-of-pocket expenses, including the reasonable fees and disbursements of counsel for the Underwriters.

SECTION 5. Conditions of Underwriters’ Obligations. The obligations of the several Underwriters hereunder are subject to the accuracy of the representations and warranties of the Company contained herein or in certificates of any officer of the Company delivered pursuant to the provisions hereof, to the performance by the Company of its covenants and other obligations hereunder, and to the following further conditions:

(a) Effectiveness of Registration Statement; Rule 430A Information. The Registration Statement, including any Rule 462(b) Registration Statement and the ADS Registration Statement have become effective and, at the Closing Time and any applicable Date of Delivery, no stop order suspending the effectiveness of the Registration Statement, the ADS Registration Statement or any post-effective amendment thereto has been issued under the 1933 Act, no order preventing or suspending the use of any preliminary prospectus or the Prospectus has been issued and no proceedings for any of those purposes have been instituted or are pending or, to the Company’s knowledge, contemplated; and the Company has complied with each request (if any) from the Commission for additional information to the reasonable satisfaction of counsel to the Underwriters. A prospectus containing the Rule 430A Information shall have been filed with the Commission in the manner and within the time frame required by Rule 424(b) without reliance on Rule 424(b)(8) or a post-effective amendment providing such information shall have been filed with, and declared effective by, the Commission in accordance with the requirements of Rule 430A.

(b) Opinion of Counsel for Company. At the Closing Time, the Representatives shall have received the opinion, dated the Closing Time, of Gide Loyrette Nouel LLP, counsel for the Company (“Gide”), in form and substance satisfactory to counsel for the Underwriters, together with signed or reproduced copies of such letter for each of the other Underwriters.

(c) Opinion of Regulatory Counsel for Company. At the Closing Time, the Representatives shall have received the opinion, dated the Closing Time, of Ropes & ▇▇▇▇ LLP, counsel to the Company with respect to certain regulatory matters, in form and substance satisfactory to counsel for the Underwriters, together with signed or reproduced copies of such letter for each of the other Underwriters.

(d) Opinion of Counsel for Depositary. At the Closing Time, the Representatives shall have received the opinion, dated the Closing Time, of ▇▇▇▇▇, ▇▇▇▇▇▇ & ▇▇▇▇▇▇, LLP, counsel for the Depositary, in form and substance satisfactory to counsel for the Underwriters, together with signed or reproduced copies of such letter for each of the other Underwriters.

(e) Opinion of Counsel for Underwriters. At the Closing Time, the Representatives shall have received the opinion, dated the Closing Time, of Shearman & Sterling LLP, counsel for the Underwriters, together with signed or reproduced copies of such letter for each of the other Underwriters with respect to such matters as the Representatives may reasonably request.

(f) Officers’ Certificate. At the Closing Time, there shall not have been, since the date hereof or since the respective dates as of which information is given in the Registration Statement, the General Disclosure Package or the Prospectus, any material adverse change in the condition, financial or otherwise, or in the earnings, business affairs or business prospects of the Company, whether or not arising in the ordinary course of business, and the Representatives shall have received a certificate of the Chief Executive Officer or the President of the Company and of the Chief Financial Officer of the Company, dated the Closing Time, to the effect that (i) there has been no such material adverse change, (ii) the representations and warranties of the Company in this Agreement are true and correct with the same force and effect as though expressly made at and as of the Closing Time, (iii) the Company has complied with all agreements and satisfied all conditions on its part to be performed or satisfied at or prior to the Closing Time and (iv) no stop order suspending the effectiveness of the Registration Statement under the 1933 Act has been issued, no order preventing or suspending the use of any preliminary prospectus or the Prospectus has been issued and no proceedings for any of those purposes have been instituted or are pending or, to their knowledge, contemplated.

(g) Depositary’s Certificate. The Depositary shall have furnished or caused to be furnished to the Underwriters a certificate satisfactory to the Representatives of one of its authorized officers with respect to the deposit with it of the Shares, the issuance of the ADRs evidencing the Shares delivered in the form of the Offered ADSs, the execution, issuance, countersignature and delivery of the ADRs evidencing the Shares delivered in the form of the Offered ADSs pursuant to the Deposit Agreement and such other customary matters related thereto as the Representatives may reasonably request.

(h) Accountant’s Comfort Letter. At the time of the execution of this Agreement, the Representatives shall have received from Deloitte & Associés a letter, dated such date, in form and substance satisfactory to the Representatives, together with signed or reproduced copies of such letter for each of the other Underwriters containing statements and information of the type ordinarily included in accountants’ “comfort letters” to underwriters with respect to the financial statements and certain financial information contained in the Registration Statement, the General Disclosure Package and the Prospectus.

(i) Bring-down Comfort Letter. At the Closing Time, the Representatives shall have received from Deloitte & Associés a letter, dated as of the Closing Time, to the effect that they reaffirm the statements made in the letter furnished pursuant to subsection (e) of this Section, except that the specified date referred to shall be a date not more than three business days prior to the Closing Time.

(j) Effective Deposit Agreement. The Company and the Depositary shall have executed and delivered the Deposit Agreement and the Deposit Agreement shall be in full force and effect.

(k) Approval of Listing. At the Closing Time, the Offered ADSs (and the underlying Shares) shall have been approved for listing on the NASDAQ Global Market, subject only to official notice of issuance.

(l) Eligible for DTC Clearance. At or prior to the Closing Time and each Date of Delivery, the Securities shall be eligible for clearance and settlement through the facilities of the DTC.

(m) No FINRA Objection. At the time of the execution of this Agreement, FINRA shall have confirmed that it has not raised any objection with respect to the fairness and reasonableness of the underwriting terms and arrangements relating to the offering of the Securities.

(n) Lock-up Agreements. At the date of this Agreement, the Representatives shall have received an agreement substantially in the form of Exhibit B hereto signed by the persons listed on Schedule C hereto.

(o) Conditions to Purchase of Option ADSs. In the event that the Underwriters exercise their option provided in Section 2(b) hereof to purchase all or any portion of the Option ADSs, the representations and warranties of the Company contained herein and the statements in any certificates furnished by the Company hereunder shall be true and correct as of each Date of Delivery and, at the relevant Date of Delivery, the Representatives shall have received:

(i) Officers’ Certificate. A certificate, dated such Date of Delivery, of the Chief Executive Officer or the President of the Company and of the Chief Financial Officer of the Company confirming that the certificate delivered at the Closing Time pursuant to Section 5(f) hereof remains true and correct as of such Date of Delivery.

(ii) Opinion of Counsel for Company. If requested by the Representatives, the opinion of Gide in form and substance satisfactory to counsel for the Underwriters, dated such Date of Delivery, relating to the Option ADSs to be purchased on such Date of Delivery and otherwise to the same effect as the opinion required by Section 5(b) hereof.

(iv) Opinion of Regulatory Counsel for Company. If requested by the Representatives, the opinion of Ropes & ▇▇▇▇ LLP in form and substance satisfactory to counsel for the Underwriters, dated such Date of Delivery, relating to the Option ADSs to be purchased on such Date of Delivery and otherwise to the same effect as the opinion required by Section 5(c) hereof.

(v) Opinion of Counsel for Depositary. If requested by the Representatives, the opinion of ▇▇▇▇▇, ▇▇▇▇▇▇ & ▇▇▇▇▇▇, LLP in form and substance satisfactory to counsel for the Underwriters, dated such Date of Delivery, relating to the Option ADSs to be purchased on such Date of Delivery and otherwise to the same effect as the opinion required by Section 5(d) hereof.

(vi) Opinion of Counsel for Underwriters. If requested by the Representatives, the opinion of Shearman & Sterling LLP, counsel for the Underwriters, dated such Date of Delivery, relating to the Option Securities to be purchased on such Date of Delivery and otherwise to the same effect as the opinion required by Section 5(e) hereof.

(vii) Depositary’s Certificate. If requested by the Representatives, a certificate from the Depositary in form and substance satisfactory to the Representatives and dated such Date of Delivery, substantially in the same form and substance as the certificate furnished to the Representatives pursuant to Section 5(g) hereof.

(viii) Bring-Down Comfort Letter. If requested by the Representatives, a letter from Deloitte & Associés, in form and substance satisfactory to the Representatives and dated such Date of Delivery, substantially in the same form and substance as the letter furnished to the

Representatives pursuant to Section 5(i), except that the “specified date” in the letter furnished pursuant to this paragraph shall be a date not more than three business days prior to such Date of Delivery.

(p) Additional Documents. At the Closing Time and at each Date of Delivery (if any) counsel for the Underwriters shall have been furnished with such additional customary documents and opinions as they may reasonably require for the purpose of enabling them to pass upon the issuance and sale of the Securities as herein contemplated, or in order to evidence the accuracy of any of the representations or warranties, or the fulfillment of any of the conditions, herein contained; and all proceedings taken by the Company in connection with the issuance and sale of the Securities and the deposit with the Depositary of the Shares as herein contemplated shall be reasonably satisfactory in form and substance to the Representatives and counsel for the Underwriters.

(q) Termination of Agreement. If any condition specified in this Section shall not have been fulfilled when and as required to be fulfilled, this Agreement, or, in the case of any condition to the purchase of Option ADSs on a Date of Delivery which is after the Closing Time, the obligations of the several Underwriters to purchase the relevant Option ADSs, may be terminated by the Representatives by notice to the Company at any time at or prior to Closing Time or such Date of Delivery, as the case may be, and such termination shall be without liability of any party to any other party except as provided in Section 4 and except that Sections 1, 6, 7, 8, 14, 15 and 16 shall survive any such termination and remain in full force and effect.

SECTION 6. Indemnification.

(a) Indemnification of Underwriters. The Company agrees to indemnify and hold harmless each Underwriter, its affiliates (as such term is defined in Rule 501(b) under the 1933 Act (each, an “Affiliate”)), its selling agents and each person, if any, who controls any Underwriter within the meaning of Section 15 of the 1933 Act or Section 20 of the 1934 Act as follows:

(i) against any and all loss, liability, claim, damage and expense whatsoever, as incurred, arising out of any untrue statement or alleged untrue statement of a material fact contained in the Registration Statement (or any amendment thereto), including the Rule 430A Information, or the omission or alleged omission therefrom of a material fact required to be stated therein or necessary to make the statements therein not misleading or arising out of any untrue statement or alleged untrue statement of a material fact included (A) in any preliminary prospectus, any Issuer Free Writing Prospectus, any Written Testing-the-Waters Communication, the General Disclosure Package or the Prospectus (or any amendment or supplement thereto), or (B) in any road show (as defined in Rule 433(h) under the Securities Act) in connection with the marketing of the offering of the Offered ADSs (a “Road Show”) or the omission or alleged omission in any preliminary prospectus, Issuer Free Writing Prospectus, any Written Testing-the-Waters Communication, Prospectus or in any Road Show of a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading;

(ii) against any and all loss, liability, claim, damage and expense whatsoever, as incurred, to the extent of the aggregate amount paid in settlement of any litigation, or any investigation or proceeding by any governmental agency or body, commenced or threatened, or of any claim whatsoever based upon any such untrue statement or omission, or any such alleged untrue statement or omission; provided that (subject to Section 6(d) below) any such settlement is effected with the written consent of the Company;

(iii) against any and all expense whatsoever, as incurred (including the fees and disbursements of counsel chosen by the Representatives), reasonably incurred and duly documented in investigating, preparing or defending against any litigation, or any investigation or proceeding by any governmental agency or body, commenced or threatened, or any claim whatsoever based upon any such untrue statement or omission, or any such alleged untrue statement or omission, to the extent that any such expense is not paid under (i) or (ii) above;

provided, however, that this indemnity agreement shall not apply to any loss, liability, claim, damage or expense to the extent arising out of any untrue statement or omission or alleged untrue statement or omission made in the Registration Statement (or any amendment thereto), including the Rule 430A Information, the General Disclosure Package or the Prospectus (or any amendment or supplement thereto) in reliance upon and in conformity with the Underwriter Information.

(b) Indemnification of Company, Directors and Officers. Each Underwriter severally agrees to indemnify and hold harmless the Company, its directors, each of its officers who signed the Registration Statement, and each person, if any, who controls the Company within the meaning of Section 15 of the 1933 Act or Section 20 of the 1934 Act, against any and all loss, liability, claim, damage and expense described in the indemnity contained in subsection (a) of this Section, as incurred, but only with respect to untrue statements or omissions, or alleged untrue statements or omissions, made in the Registration Statement (or any amendment thereto), including the Rule 430A Information, the General Disclosure Package or the Prospectus (or any amendment or supplement thereto) in reliance upon and in conformity with the Underwriter Information.

(c) Actions against Parties; Notification. Each indemnified party shall give notice as promptly as reasonably practicable to each indemnifying party of any action commenced against it in respect of which indemnity may be sought hereunder, but failure to so notify an indemnifying party shall not relieve such indemnifying party from any liability hereunder to the extent it is not materially prejudiced as a result thereof and in any event shall not relieve it from any liability which it may have otherwise than on account of this indemnity agreement. In the case of parties indemnified pursuant to Section 6(a) above, counsel to the indemnified parties shall be selected by the Representatives, and, in the case of parties indemnified pursuant to Section 6(b) above, counsel to the indemnified parties shall be selected by the Company. An indemnifying party may participate at its own expense in the defense of any such action; provided, however, that counsel to the indemnifying party shall not (except with the consent of the indemnified party) also be counsel to the indemnified party. In no event shall the indemnifying parties be liable for the reasonable fees and expenses of more than one counsel (in addition to any local counsel) separate from their own counsel for all indemnified parties in connection with any one action or separate but similar or related actions in the same jurisdiction arising out of the same general allegations or circumstances. No indemnifying party shall, without the prior written consent of the indemnified parties, settle or compromise or consent to the entry of any judgment with respect to any litigation, or any investigation or proceeding by any governmental agency or body, commenced or threatened, or any claim whatsoever in respect of which indemnification or contribution could be sought under this Section 6 or Section 7 hereof (whether or not the indemnified parties are actual or potential parties thereto), unless such settlement, compromise or consent (i) includes an unconditional release of each indemnified party from all liability arising out of such litigation, investigation, proceeding 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.

(d) Settlement without Consent if Failure to Reimburse. If at any time an indemnified party shall have requested an indemnifying party to reimburse the indemnified party for fees and expenses of counsel, such indemnifying party agrees that it shall be liable for any settlement of the nature contemplated by Section 6(a)(ii) effected without its written consent if (i) such settlement is entered into

more than 45 days after receipt by such indemnifying party of the aforesaid request, (ii) such indemnifying party shall have received notice of the terms of such settlement at least 30 days prior to such settlement being entered into and (iii) such indemnifying party shall not have reimbursed such indemnified party in accordance with such request prior to the date of such settlement.

SECTION 7. Contribution. If the indemnification provided for in Section 6 hereof is for any reason unavailable to or insufficient to hold harmless an indemnified party in respect of any losses, liabilities, claims, damages or expenses referred to therein, then each indemnifying party shall contribute to the aggregate amount of such losses, liabilities, claims, damages and expenses incurred by such indemnified party, as incurred, (i) in such proportion as is appropriate to reflect the relative benefits received by the Company, on the one hand, and the Underwriters, on the other hand, from the offering of the Offered ADSs pursuant to this Agreement or (ii) if the allocation provided by clause (i) is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) above but also the relative fault of the Company, on the one hand, and of the Underwriters, on the other hand, in connection with the statements or omissions, which resulted in such losses, liabilities, claims, damages or expenses, as well as any other relevant equitable considerations.

The relative benefits received by the Company, on the one hand, and the Underwriters, on the other hand, in connection with the offering of the Offered ADSs pursuant to this Agreement shall be deemed to be in the same respective proportions as the total net proceeds from the offering of the Offered ADSs pursuant to this Agreement (before deducting expenses) received by the Company, on the one hand, and the total underwriting discount received by the Underwriters, on the other hand, in each case as set forth on the cover of the Prospectus, bear to the aggregate initial public offering price of the Offered ADSs as set forth on the cover of the Prospectus.

The relative fault of the Company, on the one hand, and the Underwriters, on the other hand, shall be determined by reference to, among other things, whether any such untrue or alleged untrue statement of a material fact or omission or alleged omission to state a material fact relates to information supplied by the Company or by the Underwriters and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission.

The Company and the Underwriters agree that it would not be just and equitable if contribution pursuant to this Section 7 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 Section 7. The aggregate amount of losses, liabilities, claims, damages and expenses incurred by an indemnified party and referred to above in this Section 7 shall be deemed to include any legal or other expenses reasonably incurred by such indemnified party in investigating, preparing or defending against any litigation, or any investigation or proceeding by any governmental agency or body, commenced or threatened, or any claim whatsoever based upon any such untrue or alleged untrue statement or omission or alleged omission.

Notwithstanding the provisions of this Section 7, no Underwriter shall be required to contribute any amount in excess of the underwriting discounts and commissions received by such Underwriter in connection with the Shares underwritten by it and distributed to the public.

No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the ▇▇▇▇ ▇▇▇) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation.

For purposes of this Section 7, each person, if any, who controls an Underwriter within the meaning of Section 15 of the 1933 Act or Section 20 of the 1934 Act and each Underwriter’s Affiliates

and selling agents shall have the same rights to contribution as such Underwriter, and each director of the Company, each officer of the Company who signed the Registration Statement, and each person, if any, who controls the Company within the meaning of Section 15 of the 1933 Act or Section 20 of the 1934 Act shall have the same rights to contribution as the Company. The Underwriters’ respective obligations to contribute pursuant to this Section 7 are several in proportion to the number of Initial ADSs set forth opposite their respective names in Schedule A hereto and not joint.

SECTION 8. Representations, Warranties and Agreements to Survive. All representations, warranties and agreements contained in this Agreement or in certificates of officers of the Company submitted pursuant hereto, shall remain operative and in full force and effect regardless of (i) any investigation made by or on behalf of any Underwriter or its Affiliates or selling agents, any person controlling any Underwriter, its officers or directors or any person controlling the Company and (ii) delivery of and payment for the Securities.

SECTION 9. Termination of Agreement.

(a) Termination. The Representatives may terminate this Agreement, by notice to the Company, at any time at or prior to the Closing Time (i) if there has been, in the judgment of the Representatives after consultation with the Company, since the time of execution of this Agreement or since the respective dates as of which information is given in the Registration Statement, the General Disclosure Package or the Prospectus, any material adverse change in the condition, financial or otherwise, or in the earnings, business affairs or business prospects of the Company, whether or not arising in the ordinary course of business, or (ii) if there has occurred any material adverse change in the financial markets in the United States or the international financial markets, any outbreak of hostilities or escalation thereof or other calamity or crisis or any change or development involving a prospective change in U.S., French or international political, financial or economic conditions, in each case the effect of which is such as to make it, in the judgment of the Representatives, impracticable or inadvisable to proceed with the completion of the offering or to enforce contracts for the sale of the Offered ADSs, or (iii) if trading in any securities of the Company has been suspended or materially limited by the Commission or the NASDAQ Global Market, or (iv) if trading generally on the NYSE Amex or the New York Stock Exchange or in the NASDAQ Global Market or on the Alternext market of Euronext in Paris has been suspended or materially limited, or minimum or maximum prices for trading have been fixed, or maximum ranges for prices have been required, by any of said exchanges or by order of the Commission, FINRA or any other governmental authority, or (v) a material disruption has occurred in commercial banking or securities settlement or clearance services in the United States or with respect to Clearstream or Euroclear systems in Europe, or (vi) if a banking moratorium has been declared by either Federal or New York authorities or authorities in France.

(b) Liabilities. If this Agreement is terminated pursuant to this Section, such termination shall be without liability of any party to any other party except as provided in Section 4 hereof, and provided further that Sections 1, 6, 7, 8, 14, 15 and 16 shall survive such termination and remain in full force and effect.

SECTION 10. Default by One or More of the Underwriters. If one or more of the Underwriters shall fail at the Closing Time or a Date of Delivery to purchase the Securities which it or they are obligated to purchase under this Agreement (the “Defaulted Securities”), the Representatives shall have the right, within 24 hours thereafter, to make arrangements for one or more of the non-defaulting Underwriters, or any other underwriters, to purchase all, but not less than all, of the Defaulted Securities in such amounts as may be agreed upon and upon the terms herein set forth; if, however, the Representatives shall not have completed such arrangements within such 24-hour period, then:

(i) if the number of Defaulted Securities does not exceed 10% of the number of Securities to be purchased on such date, each of the non-defaulting Underwriters shall be obligated, severally and not jointly, to purchase the full amount thereof in the proportions that their respective underwriting obligations hereunder bear to the underwriting obligations of all non-defaulting Underwriters, or

(ii) if the number of Defaulted Securities exceeds 10% of the number of Securities to be purchased on such date, this Agreement or, with respect to any Date of Delivery which occurs after the Closing Time, the obligation of the Underwriters to purchase, and the Company to sell, the Option ADSs to be purchased and sold on such Date of Delivery shall terminate without liability on the part of any non-defaulting Underwriter.

No action taken pursuant to this Section shall relieve any defaulting Underwriter from liability in respect of its default.

In the event of any such default which does not result in a termination of this Agreement or, in the case of a Date of Delivery which is after the Closing Time, which does not result in a termination of the obligation of the Underwriters to purchase and the Company to sell the relevant Option ADSs, as the case may be, either the (A) Representatives or (B) the Company shall have the right to postpone Closing Time or the relevant Date of Delivery, as the case may be, for a period not exceeding seven days in order to effect any required changes in the Registration Statement, the General Disclosure Package or the Prospectus or in any other documents or arrangements. As used herein, the term “Underwriter” includes any person substituted for an Underwriter under this Section 10.

SECTION 11. Notices. All notices and other communications hereunder shall be in writing and shall be deemed to have been duly given if mailed or transmitted by any standard form of telecommunication. Notices to the Underwriters shall be directed to Leerink at ▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇ ▇▇▇▇▇, ▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇, Attention: ▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇▇, Esq. (facsimile: (▇▇▇) ▇▇▇-▇▇▇▇), and to Evercore at ▇▇ ▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇, Attention: General Counsel (facsimile: (▇▇▇) ▇▇▇-▇▇▇▇), with a copy to Shearman & Sterling LLP, ▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇, Attention: ▇▇▇▇ ▇. ▇▇▇▇▇▇, Esq. (facsimile: (▇▇▇) ▇▇▇-▇▇▇▇); notices to the Company shall be directed to it at ▇▇, ▇▇▇ ▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇-▇▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇▇ - ▇▇▇▇▇▇, Attention: ▇▇▇▇▇▇▇ ▇▇▇▇▇, Ph.D. (facsimile: ▇▇▇ (▇) ▇▇ ▇▇ ▇▇ ▇▇), with a copy to Gide Loyrette Nouel LLP, ▇▇, ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇, ▇▇▇▇▇ ▇▇▇▇▇ - ▇▇▇▇▇▇, Attention: ▇▇▇▇▇▇▇ ▇▇▇▇▇ Arsouze, Esq. (facsimile: ▇▇▇ (▇)▇ ▇▇ ▇▇ ▇▇ 68).

SECTION 12. No Advisory or Fiduciary Relationship. The Company acknowledges and agrees that (i) the purchase and sale of the Securities pursuant to this Agreement, including the determination of the initial public offering price of the Offered ADSs and any related discounts and commissions, is an arm’s-length commercial transaction between the Company, on the one hand, and the several Underwriters, on the other hand, (ii) in connection with the offering of the Offered ADSs and the process leading thereto, each Underwriter is and has been acting solely as a principal and is not the agent or fiduciary of the Company, or its stockholders, creditors, employees or any other party, (iii) no Underwriter has assumed or will assume an advisory or fiduciary responsibility in favor of the Company with respect to the offering of the Offered ADSs or the process leading thereto (irrespective of whether such Underwriter has advised or is currently advising the Company on other matters) and no Underwriter has any obligation to the Company with respect to the offering of the Securities except the obligations expressly set forth in this Agreement, (iv) the Underwriters and their respective affiliates may be engaged in a broad range of transactions that involve interests that differ from those of the Company and (v) the Underwriters have not provided any legal, accounting, regulatory or tax advice with respect to the offering of the Offered ADSs and the Company has consulted its own respective legal, accounting, regulatory and tax advisors to the extent it deemed appropriate.

SECTION 13. Parties. This Agreement shall each inure to the benefit of and be binding upon the Underwriters and the Company and their respective successors. Nothing expressed or mentioned in this Agreement is intended or shall be construed to give any person, firm or corporation, other than the Underwriters and the Company and their respective successors and the controlling persons and officers and directors referred to in Sections 6 and 7 and their heirs and legal representatives, any legal or equitable right, remedy or claim under or in respect of this Agreement or any provision herein contained. This Agreement and all conditions and provisions hereof are intended to be for the sole and exclusive benefit of the Underwriters and the Company and their respective successors, and said controlling persons and officers and directors and their heirs and legal representatives, and for the benefit of no other person, firm or corporation. No purchaser of Offered ADSs from any Underwriter shall be deemed to be a successor by reason merely of such purchase.

SECTION 14. Trial by Jury. The Company (on its behalf and, to the extent permitted by applicable law, on behalf of its stockholders and affiliates) 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.

SECTION 15. GOVERNING LAW. THIS AGREEMENT AND ANY CLAIM, CONTROVERSY OR DISPUTE ARISING UNDER OR RELATED TO THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF, THE STATE OF NEW YORK WITHOUT REGARD TO ITS CHOICE OF LAW PROVISIONS.

SECTION 16. Consent to Jurisdiction; Waiver of Immunity. Any legal suit, action or proceeding arising out of or based upon this Agreement or the transactions contemplated hereby (“Related Proceedings”) shall be instituted in (i) the federal courts of the United States of America located in the City and County of New York, Borough of Manhattan or (ii) the courts of the State of New York located in the City and County of New York, Borough of Manhattan (collectively, the “Specified Courts”), and each party irrevocably submits to the exclusive jurisdiction (except for proceedings instituted in regard to the enforcement of a judgment of any such court (a “Related Judgment”), as to which such jurisdiction is non-exclusive) of such courts in any such suit, action or proceeding. Service of any process, summons, notice or document by mail to such party’s address set forth above shall be effective service of process for any suit, action or other proceeding brought in any such court. The parties irrevocably and unconditionally waive any objection to the laying of venue of any suit, action or other proceeding in the Specified Courts and irrevocably and unconditionally waive and agree not to plead or claim in any such court that any such suit, action or other proceeding brought in any such court has been brought in an inconvenient forum. Each party not located in the United States irrevocably appoints [CT Corporation System] as its agent to receive service of process or other legal summons for purposes of any such suit, action or proceeding that may be instituted in any state or federal court in the City and County of New York. With respect to any Related Proceeding, each party irrevocably waives, to the fullest extent permitted by applicable law, all immunity (whether on the basis of sovereignty or otherwise) from jurisdiction, service of process, attachment (both before and after judgment) and execution to which it might otherwise be entitled in the Specified Courts, and with respect to any Related Judgment, each party waives any such immunity in the Specified Courts or any other court of competent jurisdiction, and will not raise or claim or cause to be pleaded any such immunity at or in respect of any such Related Proceeding or Related Judgment, including, without limitation, any immunity pursuant to the United States Foreign Sovereign Immunities Act of 1976, as amended.

SECTION 17. Judgment Currency. The obligations of the Company pursuant to this Agreement in respect of any sum due to any Underwriter shall, notwithstanding any judgment in a currency other than United States dollars, not be discharged until the first business day, following receipt by such Underwriter of any sum adjudged to be so due in such other currency, on which (and only to the extent

that) such Underwriter may in accordance with normal banking procedures purchase United States dollars with such other currency; if the United States dollars so purchased are less than the sum originally due to such Underwriter hereunder, the Company agrees, as a separate obligation and notwithstanding any such judgment, to indemnify such Underwriter against such loss.

SECTION 18. TIME. TIME SHALL BE OF THE ESSENCE OF THIS AGREEMENT. EXCEPT AS OTHERWISE SET FORTH HEREIN, SPECIFIED TIMES OF DAY REFER TO NEW YORK CITY TIME.

SECTION 19. Partial Unenforceability. The invalidity or unenforceability of any section, paragraph or provision of this Agreement shall not affect the validity or enforceability of any other section, paragraph or provision hereof. If any section, paragraph or provision of this Agreement is for any reason determined to be invalid or unenforceable, there shall be deemed to be made such minor changes (and only such minor changes) as are necessary to make it valid and enforceable.

SECTION 20. Counterparts. This Agreement may be executed 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 agreement.

SECTION 21. Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction hereof.

SECTION 22. Entire Agreement. This Agreement supersedes all prior agreements and understandings (whether written or oral) between the Company and the Underwriters, or any of them, with respect to the subject matter hereof.

(Signature page follows)

If the foregoing is in accordance with your understanding of our agreement, please sign and return to the Company a counterpart hereof, whereupon this instrument, along with all counterparts, will become a binding agreement among the Underwriters and the Company in accordance with its terms.


Very truly yours,

GENSIGHT BIOLOGICS S.A.

By
		Name:
		Title:

[Signature Page to Underwriting Agreement]


CONFIRMED AND ACCEPTED,
as of the date first above written:

LEERINK PARTNERS LLC

By
		Name:
		Title:

[Signature Page to Underwriting Agreement]


EVERCORE GROUP L.L.C.

By
		Name:
		Title:

For themselves and as Representatives of the other Underwriters named in Schedule A hereto.

[Signature Page to Underwriting Agreement]

SCHEDULE A

The initial public offering price per Share shall be €[●] (which price is the equivalent to $[●] per Offered ADS based upon the exchange rate as of the date hereof, as agreed between the Representatives and the Company).

The purchase price per Share to be paid by the several Underwriters shall be €[●] (which price is the equivalent to $[●] per Offered ADS based upon the exchange rate as of the date hereof, as agreed between the Representatives and the Company), being an amount equal to the initial public offering price set forth above [less €[●] per Share ($[●] per Offered ADS)].


Name of Underwriter		Number of Initial Securities
Leerink Partners LLC
Evercore Group L.L.C.
Canaccord Genuity Inc.

Total

Sch. A-1

SCHEDULE B-1

Pricing Terms

1. The Company is selling [●] Initial Shares (to be delivered in the form of Initial ADSs).

2. The Company has granted an option to the Underwriters, severally and not jointly, to purchase up to an additional [●] Option Shares (to be delivered in the form of Option ADSs).

3. The initial public offering price per Share (to be delivered in the form of Offered ADSs) shall be €[●] (which price is the equivalent to $[●] per Offered ADS based upon the exchange rate as of the date hereof, as agreed between the Representatives and the Company).

Sch. B-1-1

SCHEDULE B-2

Issuer Free Writing Prospectuses

[None.]

Sch. B-2-1

SCHEDULE B-3

List of Written Testing-the-Waters Communications

[Investor Presentation used in testing-the-waters meetings in [June] 2015.]

Sch. B-3-1

SCHEDULE C

List of Persons and Entities Subject to Lock-up

(1)	Abingworth Bioventures VI LP

(2)	▇▇▇▇▇▇▇ ▇▇▇▇▇

(3)	▇▇▇▇▇▇ ▇▇▇▇▇▇▇

(4)	Fonds Biothérapies Innovantes des Maladies Rares

(5)	▇▇▇▇-▇▇▇▇▇▇▇▇ Combal

(6)	▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇

(7)	Novartis Pharma AG

(8)

Versant

(9)	Vitavest S.à.▇.▇.

Sch. C-1

Exhibit B

FORM OF LOCK-UP FROM DIRECTORS, OFFICERS OR OTHER STOCKHOLDERS

PURSUANT TO SECTION 5(n)

Lock-Up Agreement

, 2015

Leerink Partners LLC

▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇ ▇▇▇▇▇

▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇

Evercore Group L.L.C.

▇▇ ▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇

▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇

as Representatives of the several Underwriters

Re:

Proposed Public Offering by GenSight Biologics S.A.

Ladies and Gentlemen:

The undersigned, a shareholder, officer and/or director of GenSight Biologics S.A., a société anonyme incorporated under the laws of France (the “Company”), understands that Leerink Partners LLC (“Leerink”) and Evercore Group L.L.C. (“Evercore” and, together with Leerink, the “Representatives”) propose to enter into an Underwriting Agreement (the “Underwriting Agreement”) with the Company providing for the public offering (the “Public Offering”) of ordinary shares, nominal value € per share, of the Company (the “Ordinary Shares”) to be delivered in the form of American Depositary Shares (the “ADSs”). In recognition of the benefit that such an offering will confer upon the undersigned as a shareholder, an officer and/or a director of the Company, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the undersigned agrees with each underwriter to be named in the Underwriting Agreement that, during the period beginning on the date hereof and ending on the date that is 180 calendar days from the date of the Underwriting Agreement (the “Lock-Up Period”), the undersigned will not, without the prior written consent of the Representatives, directly or indirectly, (i) offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant for the sale of, or otherwise dispose of or transfer any Ordinary Shares or any securities convertible into or exchangeable or exercisable for Ordinary Shares, which includes the ADSs (collectively, the “Lock-Up Securities”), or exercise any right with respect to the registration of any of the Lock-Up Securities, or file or cause to be filed any registration statement in connection therewith, under the Securities Act of 1933, as amended, or (ii) enter into any swap or any other agreement or any transaction that transfers, in whole or in part, directly or indirectly, the economic consequence of ownership of the Lock-Up Securities, whether any such swap or transaction is to be settled by delivery of Ordinary Shares or other securities, in cash or otherwise. If the undersigned is an officer or director of the Company, the undersigned further agrees that the foregoing provisions shall be equally applicable to any issuer-directed ADSs the undersigned may purchase in the Public Offering.

B-1

If the undersigned is an officer or director of the Company, (1) the Representatives agree that, at least three business days before the effective date of any release or waiver of the foregoing restrictions in connection with a transfer of Ordinary Shares or ADSs, as applicable, the Representatives will notify the Company of the impending release or waiver, and (2) the Company has agreed in the Underwriting Agreement to announce the impending release or waiver by press release through a major news service at least two business days before the effective date of the release or waiver. Any release or waiver granted by the Representatives hereunder to any such officer or director shall only be effective two business days after the publication date of such press release. The provisions of this paragraph will not apply if (i) the release or waiver is effected solely to permit a transfer not for consideration and (ii) the transferee has agreed in writing to be bound by the same terms described in this Lock-Up Agreement (this “Agreement”) to the extent and for the duration that such terms remain in effect at the time of the transfer.

Notwithstanding the foregoing, and subject to the conditions below, the undersigned may transfer Lock-Up Securities without the prior written consent of the Representatives, provided, in each case, that (1) the Representatives receive a signed lock-up agreement for the balance of the Lock-Up Period from each donee, trustee, distributee or transferee, as the case may be, (2) any such transfer shall not involve a disposition for value, (3) such transfers are not required to be reported with the Securities and Exchange Commission on Form 4 in accordance with Section 16 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and (4) the undersigned does not otherwise voluntarily effect any public filing or report regarding such transfers (other than a filing on a Form 5 made after the expiration of the Lock-Up Period):

(i)

to any transfers of Ordinary Shares, which includes the ADSs, or other securities which are purchased or subscribed by the undersigned in open market transactions after the completion of the Public Offering;

(ii)

to any transfer of Ordinary Shares, which includes the ADSs, or other securities described in the preceding paragraph by way of acceptance of a public tender or exchange offer for the Ordinary Shares or other securities described above

(iii)

as a bona fide gift or gifts;

(iv)

to any trust for the direct or indirect benefit of the undersigned or the immediate family of the undersigned (for purposes of this Agreement, “immediate family” shall mean any relationship by blood, marriage or adoption, not more remote than first cousin);

(v)

as a distribution or other transfer by a partnership or any investment fund to its partners or former partners or by a limited liability company to its members or retired members or by a corporation to its shareholders or former shareholders or to any wholly owned subsidiary of such corporation;

(vi)

to the undersigned’s affiliates or to any investment fund or other entity controlled or managed or advised by the undersigned (or its management company) or any affiliate of the management company of the undersigned;

(vii)

pursuant to a qualified domestic relations order or in connection with a divorce settlement;

(viii)

by will or intestate succession upon the death of the undersigned; or

(ix)

to the Company in satisfaction of any tax withholding obligation.

B-2

Furthermore, no provision in this Agreement shall be deemed to restrict or prohibit (1) the transfer of the undersigned’s Lock-Up Securities to the Company in connection with the termination of the undersigned’s services to the Company, provided that no filing by any party under the Exchange Act or other public announcement shall be required or shall be made voluntarily in connection with such transfer (other than a filing on a Form 5 made after the expiration of the Lock-Up Period); (2) the exercise or exchange by the undersigned of any option or warrant to acquire any Ordinary Shares or options to purchase Ordinary Shares, pursuant to any stock option, stock bonus or other stock plan or arrangement; provided, however, that the underlying Ordinary Shares shall continue to be subject to the restrictions on transfer set forth in this Agreement; (3) the transfer of Lock-Up Securities upon the completion of a bona fide third-party tender offer, merger, consolidation or other similar transaction made to all holders of the Company’s securities involving a change of control of the Company; provided, however, that in the event that such tender offer, merger, consolidation or other such transaction is not completed, such securities held by the undersigned shall remain subject to the restrictions on transfer set forth in this Agreement; (4) the conversion of the outstanding preferred shares of the Company into Ordinary Shares, or Ordinary Shares into ADSs, provided that any such shares received upon such conversion shall be subject to the restrictions on transfer set forth in this Agreement; and (5) a transaction relating to the Ordinary Shares or any securities convertible into or exchangeable or exercisable for Ordinary Shares, which includes the ADSs, acquired in open market transactions after the completion of the Public Offering.

Notwithstanding anything herein to the contrary, nothing herein shall prevent the undersigned from establishing a 10b5-1 trading plan that complies with Rule 10b5-1 under the Exchange Act (“10b5-1 trading plan”) or from amending an existing 10b5-1 trading plan so long as there are no sales of Lock-Up Securities under such plans during the Lock-Up Period; provided that the establishment of a 10b5-1 trading plan or the amendment of a 10b5-1 trading plan shall only be permitted if (i) the establishment or amendment of such plan is not required to be reported in any public report or filing with the Securities Exchange Commission or otherwise and (ii) the undersigned does not otherwise voluntarily effect any public filing or report regarding the establishment or amendment of such plan.

In the event that, during the Lock-Up Period, the Representatives waive any prohibition on the transfer of shares of any Lock-Up Securities held by any person or entity that beneficially owns 5% or more of the outstanding Ordinary Shares, the Representatives shall be deemed to have also waived, on the same terms, the prohibitions set forth in this Agreement that would otherwise have applied to the undersigned on a pro-rata basis with respect to the same proportion of the undersigned’s Lock-Up Securities as the (x) aggregate Lock-Up Securities held by such party receiving the waiver that is subject to the waiver bears to the aggregate Ordinary Shares held by such party. The provisions of this paragraph will not apply: (1) unless and until the Representatives have first waived more than 1% of the Company’s total outstanding Ordinary Shares from such prohibitions, (2) (a) if the release or waiver is effected solely to permit a transfer not involving a disposition for value and (b) the transferee has agreed in writing to be bound by the same terms described in this Agreement to the extent and for the duration that such terms remain in effect at the time of the transfer, or (3) if the release or waiver is granted to a holder of Lock-Up Securities in connection with a follow-on public offering of Ordinary Shares pursuant to a registration statement under the Securities Act; provided that in the event of any release or waiver pursuant to this clause (3), the same percentage of the undersigned’s Lock-Up Securities (determined as set forth above) shall be released, but only for the purpose of participating in such offering. In the event that any percentage of such Lock-Up Securities released from the restrictions set forth in this Agreement are subject to any restrictions of the type set forth in this Agreement, the same restrictions shall be applicable to the release of the same percentage of the undersigned’s Lock-Up Securities. In the event that, as a result of this paragraph, any Lock-Up Securities held by the undersigned are released from the restrictions imposed by this Agreement, the Representatives shall use commercially reasonable efforts to notify the Company within two business days of the effective date of such release, and the Company, in turn, in consultation with the Representatives, shall use commercially reasonable efforts to notify the undersigned

B-3

within two business days thereafter that the same percentage of aggregate Lock-Up Securities held by the undersigned has been released from the restrictions set forth in this Agreement; provided that the failure to give such notice to the Company or the undersigned shall not give rise to any claim or liability against the Company, the Representatives or the Underwriters.

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 Lock-Up Securities except in compliance with the foregoing restrictions. This Agreement shall automatically terminate, and the undersigned shall be released from the undersigned’s obligations hereunder, upon the earliest to occur, if any, of (i) prior to the execution of the Underwriting Agreement, the Company advises the Representatives in writing that it has determined not to proceed with the Public Offering, (ii) the Company files an application to withdraw the registration statement related to the Public Offering, (iii) the Underwriting Agreement is executed but is terminated prior to the closing of the Public Offering (other than the provisions thereof which survive termination) or (iv) December 31, 2015, in the event that the Underwriting Agreement has not been executed by such date.

[Signature page follows]

B-4


Very truly yours,


Name of Security Holder (Print exact name)

By:
		Signature

If not signing in an individual capacity:


Name of Authorized Signatory (Print)


Title of Authorized Signatory (Print)

(indicate capacity of person signing if signing as custodian, trustee or on behalf of an entity)

B-5

Exhibit C

FORM OF PRESS RELEASE

TO BE ISSUED PURSUANT TO SECTION 3(j)

Client

[Date]

Client (the “Company”) announced today that Leerink Partners LLC and Evercore Group L.L.C., the joint book-running managers in the Company’s recent public sale of [●] ordinary shares, nominal value €[●] per share, of the Company to be delivered in the form of an aggregate of [●] American Depositary Shares (collectively, the “Shares”), are [waiving] [releasing] a lock-up restriction with respect to shares of the Shares held by [certain officers or directors] [an officer or director] of the Company. The [waiver] [release] will take effect on , 20 , and the shares may be sold on or after such date.

This press release is not an offer for sale of the securities in the United States or in any other jurisdiction where such offer is prohibited, and such securities may not be offered or sold in the United States absent registration or an exemption from registration under the United States Securities Act of 1933, as amended.

C-1

GENSIGHT BIOLOGICS S.A. (a société anonyme incorporated under the laws of France) [●] American Depositary Shares, Each Representing [●] Ordinary Share[s] (nominal value €[●] per share) UNDERWRITING AGREEMENT

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