Exhibit 1.1

THERAVANCE BIOPHARMA, INC.

(a Cayman Islands exempted company)

3,850,000 Ordinary Shares

UNDERWRITING AGREEMENT

Dated: October 27, 2016

THERAVANCE BIOPHARMA, INC.

(a Cayman Islands exempted company)

3,850,000 Ordinary Shares

UNDERWRITING AGREEMENT

October 27, 2016

Leerink Partners LLC

Evercore Group L.L.C.

as Representatives of the several Underwriters named in Schedule A hereto

c/o Leerink Partners LLC

299 Park Avenue, 21st floor

New York, NY 10171

c/o Evercore Group L.L.C.

55 East 52nd Street

New York, New York 10055

Ladies and Gentlemen:

Theravance Biopharma, Inc., a Cayman Islands exempted company (the “Company”), confirms its agreement with Leerink Partners LLC (“Leerink”) and Evercore Group L.L.C. (“Evercore”) and each of the other Underwriters, if any, 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 the respective number of ordinary shares, par value $0.00001 per share, of the Company (the “Ordinary Shares”) set forth in said Schedule A (such aggregate number of Ordinary Shares, the “Initial Securities”), 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 an additional 577,500 aggregate Ordinary Shares (the “Option Securities” and, together with the Initial Securities, the “Securities”).  The Securities will have attached thereto rights (the “Rights”) to acquire preferred shares of Theravance Biopharma, Inc. pursuant to the Rights Agreement by and between Theravance Biopharma, Inc. and Computershare dated as of May 9, 2014, as amended (the “Rights Agreement”).

Concurrently with the offering of the Securities, the Company is offering Convertible Senior Notes due 2023 (the “Notes”) in a separate underwritten public offering (the “Concurrent Convertible Notes Offering”) and intends to enter into a separate underwriting agreement with the representatives of the underwriters of such offering, including Leerink and Evercore.

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

The Company has prepared and filed with the Securities and Exchange Commission (the “Commission”) an automatic shelf registration statement, including a prospectus, on Form S-3 (File No.

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333-214257) covering the public offering and sale of certain securities (the “Shelf Securities”), including the Securities and the Rights, under the Securities Act of 1933, as amended, and the rules and regulations (the “1933 Act Regulations”) promulgated thereunder (collectively, the “1933 Act”), which became effective under Rule 462(e) under the 1933 Act Regulations (“Rule 462(e)”). Such registration statement, as of any time, means such registration statement as amended by any post-effective amendments thereto to such time, including the information deemed to be a part thereof as of such time pursuant to Rule 430A (“Rule 430A”) or Rule 430B (“Rule 430B”) under the 1933 Act Regulations, is referred to herein as the “Registration Statement;” provided that the “Registration Statement” without reference to a time means such registration statement as amended by any post-effective amendments thereto as of the time of the first contract of sale for the Securities, which time shall be considered the “new effective date” of such registration statement with respect to the Securities within the meaning of paragraph (f)(2) of Rule 430B, including the exhibits and schedules thereto as of such time, the documents incorporated or deemed incorporated by reference therein at such time pursuant to Item 12 of Form S-3 under the 1933 Act and the documents otherwise deemed to be a part thereof as of such time pursuant to the Rule 430B; and the related prospectus covering the Shelf Securities dated October 26, 2016 in the form first used to confirm sales of the Securities (or in the form first made available to the Underwriters by the Company to meet requests of purchasers pursuant to Rule 173 under the Securities Act) is hereinafter referred to as the “Basic Prospectus.”  The Basic Prospectus, as supplemented by the prospectus supplement specifically relating to the Securities in the form first used to confirm sales of the Securities (or in the form first made available to the Underwriters by the Company to meet requests of purchasers pursuant to Rule 173 under the 1933 Act) is hereinafter referred to as the “Prospectus,” and the term “preliminary prospectus” means any preliminary form of the Prospectus. For purposes of this Agreement, all references to the Registration Statement, any preliminary prospectus, the Prospectus or any amendment or supplement to any of the foregoing shall be deemed to refer to and include the amendments incorporated by reference therein pursuant to Item 12 of Form S-3 under the 1933 Act as of the effective date of the Registration Statement or the date of such preliminary prospectus or the Prospectus, as the case may be. All references in this Agreement to amendments or supplements to the Registration Statement, any preliminary prospectus or the Prospectus shall be deemed to include the filing of any document under the Securities Exchange Act of 1934, as amended, and the rules and regulations (the “1934 Act Regulations”) promulgated thereunder (collectively, the “1934 Act”), incorporated or deemed to be incorporated by reference in the Registration Statement, the Preliminary Prospectus or the Prospectus, as the case may be, at or after the execution and delivery of this Agreement.

As used in this Agreement:

“Applicable Time” means 11:30 P.M., New York City time, on October 27, 2016 or such other time as agreed by the Company and the Representatives.

“Business Day” means any day other than a day on which banks are permitted or required to be closed in New York City.

“General Disclosure Package” means any Issuer General Use Free Writing Prospectuses issued at or prior to the Applicable Time and the most recent preliminary prospectus (including any documents incorporated therein by reference) that is distributed to investors prior to the Applicable Time and the information set forth 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

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required to be filed with the Commission, (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), or (iv) any Final Term Sheet (as defined below).

“Issuer General Use Free Writing Prospectus” means any Issuer Free Writing Prospectus that is intended for general distribution to prospective investors, 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.

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 Statement and Prospectuses .  The Company meets the requirements for use of Form S-3 under the 1933 Act.  The Registration Statement is an “automatic shelf registration statement” (as defined in Rule 405) and the Securities have been and remain eligible for registration by the Company on such automatic shelf registration statement. Each of the Registration Statement and any post-effective amendment thereto has become effective under the 1933 Act. No stop order suspending the effectiveness of the 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.  The Company has complied with each request (if any) from the Commission for additional information.

Each of the Registration Statement and any post-effective amendment thereto, at the time of its effectiveness and at each deemed effective date with respect to the Underwriters pursuant to Rule 430B, complied in all material respects with the requirements of the 1933 Act.  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 Regulations. Each preliminary prospectus and the Prospectus delivered to the Underwriters for use in connection with this offering was identical to the electronically transmitted copies thereof filed with the Commission pursuant to EDGAR, except to the extent permitted by Regulation S-T.

The documents incorporated or deemed to be incorporated by reference in the Registration Statement, any preliminary prospectus and the Prospectus, when they became effective or at the time they were or hereafter are filed with the Commission, complied and will comply in all material respects with the requirements of the 1934 Act.

(ii)                                   Accurate Disclosure .  Neither the Registration Statement nor any amendment 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 nor (B) any

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individual Issuer Limited Use Free Writing Prospectus, when considered together with the General Disclosure Package and (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 documents incorporated or deemed to be incorporated by reference in the Registration Statement, the General Disclosure Package and the Prospectus, at the time the Registration Statement became effective or when such documents incorporated by reference were filed with the Commission, as the case may be, when read together with the other information in the Registration Statement, the General Disclosure Package or the Prospectus, as the case may be, did not and 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.

The representations and warranties in this subsection shall not apply to statements in or omissions from the Registration Statement (or any amendment thereto), the General Disclosure Package or the Prospectus (or any amendment or supplement thereto) 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 the first paragraph under the heading “Underwriting—Underwriting Discounts and Commissions,” the information under the heading “Underwriting—Price Stabilization, Short Positions and Penalty Bids,” and the information under the heading “Underwriting—Electronic Distribution,” 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, including any document incorporated by reference therein, and any preliminary or other prospectus deemed to be a part thereof that has not been superseded or modified.

(iv)                               Emerging Growth Company Status .  From the time of the initial filing of the Registration Statement with 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 Securities Act (an “Emerging Growth Company”).

(v)                                  Well-Known Seasoned Issuer . (A) At the original effectiveness of the Registration Statement, (B) at the time of the most recent amendment thereto for the purposes of complying with Section 10(a)(3) of the 1933 Act (whether such amendment was by post-effective amendment, incorporated report filed pursuant to Section 13 or 15(d) of the 1934 Act or form of prospectus), (C) at the time the Company or any person acting on its behalf (within the meaning, for this clause only, of Rule 163(c) under the 1933 Act) made any offer relating to the  Securities in reliance on the exemption of Rule 163 under the 1933 Act, and (D) as of the Applicable Time, the Company was and is a “well-known seasoned issuer” (as defined in Rule 405).

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(vi)                               Company Not Ineligible Issuer .  At the time of filing the Registration Statement and any post-effective amendment 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 Securities 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.

(vii)                            Independent Accountants .  Ernst & Young LLP, which audited the financial statements and supporting schedules included or incorporated by reference in the Registration Statement, the General Disclosure Package or the Prospectus, are independent public accountants as required by the 1933 Act, the 1934 Act and the Public Company Accounting Oversight Board.

(viii)                         Financial Statements .  The financial statements included or incorporated by reference in the Registration Statement, the General Disclosure Package and the Prospectus, together with the related schedules and notes, present fairly the financial position of the Company and its consolidated subsidiaries at the dates indicated and the statement of operations, stockholders’ equity and cash flows of the Company and its consolidated subsidiaries for the periods specified; said financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) applied on a consistent basis throughout the periods involved.  The supporting schedules, if any, present fairly in accordance with GAAP the information required to be stated therein.  The selected financial data and the summary financial information included in the General Disclosure Package present fairly the information shown therein and have been compiled on a basis consistent with that of the audited financial statements included therein.  Except as included or incorporated by reference 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.

(ix)                               No Material Adverse Change in Business .  Since the respective dates as of which information is given in the Registration Statement, the General Disclosure Package or the Prospectus, except as otherwise stated therein, (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 and its subsidiaries considered as one enterprise, 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 or any of its subsidiaries, other than those in the ordinary course of business and other than the Concurrent Convertible Notes Offering, which are material with respect to the Company and its subsidiaries considered as one enterprise, and (C) except as described in the General Disclosure Package there has been no dividend or distribution of any kind declared, paid or made by the Company on any class of its share capital.

(x)                                  Good Standing of the Company .  The Company has been duly incorporated and is validly existing as an exempted company in good standing under the laws of the Cayman Islands and 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 Securities; and the Company is duly qualified as a foreign corporation, partnership or limited liability company, as applicable, 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 so to qualify or to be in good standing would not result in a Material Adverse Effect.

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(xi)                               Good Standing of Subsidiaries .  Each “significant subsidiary” of the Company (as such term is defined in Rule 1-02 of Regulation S-X) (each, a “Subsidiary” and, collectively, the “Subsidiaries”) has been duly organized and is validly existing in good standing (or the functional equivalent) under the laws of the jurisdiction of its incorporation or organization, has corporate or similar 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 is duly qualified to transact business and is in good standing in each 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 so qualify or to be in good standing would not result in a Material Adverse Effect.  Except as otherwise disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, all of the issued and outstanding share capital or capital stock of each Subsidiary has been duly authorized and validly issued, is fully paid and non-assessable and is owned by the Company, directly or through subsidiaries, free and clear of any security interest, mortgage, pledge, lien, encumbrance, claim or equity.  None of the outstanding shares of share capital or capital stock of any Subsidiary were issued in violation of the preemptive or similar rights of any securityholder of such Subsidiary.  The only subsidiaries of the Company are (A) the subsidiaries Schedule D hereto and (B) certain other subsidiaries which, considered in the aggregate as a single subsidiary, do not constitute a “significant subsidiary” as defined in Rule 1-02 of Regulation S-X.

(xii)                            Capitalization .  The authorized, issued and outstanding share capital of the Company is 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, pursuant to this Agreement, pursuant to reservations, agreements or employee benefit plans referred to in the Registration Statement, the General Disclosure Package and the Prospectus or pursuant to the exercise of convertible securities or options referred to in the Registration Statement, the General Disclosure Package and the Prospectus).  The issued and outstanding share capital of the Company has been duly authorized and validly issued and are fully paid and non-assessable; none of the issued and outstanding shares of the Company was issued in violation of the preemptive or other similar rights of any securityholder of the Company.

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

(xiv)                        Authorization of the Securities and the Rights .  The Securities have been duly authorized 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 and, with respect to the Ordinary Shares, have been registered on the Company’s register of members, will be validly issued and fully paid and non assessable; and the issuance of the Securities is not subject to the preemptive or other similar rights of any securityholder of the Company.   The Securities conform, in all material respects, 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.  The Rights Agreement has been duly authorized, executed and delivered by the Company and constitutes a valid and legally binding agreement of the Company enforceable against the Company in accordance with its terms, except as the enforcement thereof may be limited by bankruptcy, insolvency (including, without limitation, all laws relating to fraudulent transfers), reorganization, moratorium or similar laws affecting enforcement of creditors’ rights generally and except as enforcement thereof is subject to general principles of equity (regardless of whether enforcement is considered in a proceeding in equity or at law); and the Rights have been duly authorized by

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the Company and, when issued, will be validly issued, and the Series A junior participating preferred shares have been duly authorized by the Company and validly reserved for issuance upon the exercise in accordance with the terms of the Rights Agreement and registered in the Company’s register of members, will be validly issued, fully paid and non-assessable.

(xv)                           Absence of Defaults and Conflicts .  Neither the Company nor any of its subsidiaries is (A) in violation of its memorandum and articles of association, 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 or any of its subsidiaries is a party or by which it or any of them may be bound, or to which any of the property or assets of the Company or any of its subsidiaries is subject (collectively, “Agreements and Instruments”) except for such defaults that would not reasonably be expected to have a Material Adverse Effect, or (C) in violation of any 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 its subsidiaries or any of their respective properties, assets or operations (each, a “Governmental Entity”), except for such violations that would not, single or in the aggregate, result in a Material Adverse Effect; and the execution, delivery and performance of this Agreement and the consummation of the transactions contemplated herein and in the Registration Statement, the General Disclosure Package and the Prospectus (including the issuance and sale of the Securities and the use of the proceeds from the sale of the Securities as described in the Registration Statement, the General Disclosure Package and the Prospectus 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 property or assets of the Company or any of its subsidiaries pursuant to, the Agreements and Instruments (except for such conflicts, breaches, defaults or Repayment Events or liens, charges or encumbrances that would not 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 of its subsidiaries or any applicable 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 or any of its subsidiaries.

(xvi)                        Absence of Labor Dispute .  No labor dispute with the employees of the Company or any of its subsidiaries 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 or its subsidiaries principal suppliers, manufacturers, customers or contractors, which, in either case, would result in a Material Adverse Effect.

(xvii)                     Absence of Proceedings .  There is no claim, action, suit, proceeding, inquiry or investigation before or brought by any court or governmental agency or body, domestic or foreign, now pending, or, to the knowledge of the Company, threatened, against or affecting the Company or any of its subsidiaries, which is required to be disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, or which would reasonably be expected to result in a Material Adverse Effect, or which would reasonably be expected to materially and adversely affect the performance by the Company of its obligations under this

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Agreement; the aggregate of all pending legal or governmental proceedings to which the Company or any of its subsidiaries is a party or of which any of their respective property 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.

(xviii)                  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 the documents incorporated by reference therein or to be filed as exhibits thereto which have not been so described and filed as required.

(xix)                        Possession of Intellectual Property .  The Company owns, or otherwise possesses, sufficient rights to use all patents, patent rights, licenses, inventions, copyrights, know-how (including trade secrets and other unpatented and/or unpatentable proprietary rights), trademarks, service marks, trade names or other intellectual property (collectively, “Intellectual Property”) necessary to carry on the business of the Company as described in the Registration Statement, the General Disclosure Package or the Prospectus, except where the lack of such rights would not result, singly or in the aggregate, in a Material Adverse Effect.  The Company has not received any notice, and is not otherwise aware of any infringement of or conflict with asserted rights of others with respect to any Intellectual Property, or of any valid grounds for any bona fide claim that would render any of the Company’s Intellectual Property rights invalid or inadequate to protect the interests of the Company or its subsidiaries therein, and which infringement or conflict (if the subject of any unfavorable decision, ruling or finding) or invalidity or inadequacy, singly or in the aggregate, would result in a Material Adverse Effect.

(xx)                           Absence of Manipulation .  Neither the Company nor any Affiliate of the Company has taken, nor will the Company or any Affiliate take, directly or indirectly, any action which is designed to or which has constituted or which would be expected to cause or result in stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Securities.

(xxi)                        Absence of Further Requirements .  No filing with, or authorization, approval, consent, license, order, registration, qualification or decree of, any court or governmental authority or agency is necessary or required for the performance by the Company of its obligations hereunder, in connection with the offering, issuance or sale of the Securities 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 rules of The NASDAQ Stock Market LLC, state securities laws or laws and regulations of jurisdictions outside the United States or the rules of The Financial Industry Regulatory Authority, Inc. (“FINRA”).

(xxii)                     Possession of Licenses and Permits .  The Company and its subsidiaries possess such permits, licenses, approvals, consents and other authorizations (collectively, “Governmental Licenses”) issued by the appropriate federal, state, local or foreign regulatory agencies or bodies necessary to conduct the business of the Company as described in the Registration Statement, the General Disclosure Package or the Prospectus, except where the failure so to possess would not, singly or in the aggregate, result in a Material Adverse Effect; the Company and its subsidiaries are in compliance with the terms and conditions of all such Governmental Licenses, except where the failure so to comply would not, singly or in the aggregate, result in a Material Adverse Effect; all of the Governmental Licenses are valid and in full force and effect, except when the invalidity of such Governmental Licenses or the failure of such Governmental Licenses to be in full force

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and effect would not, singly or in the aggregate, result in a Material Adverse Effect; and neither the Company nor any of its subsidiaries has received any notice of proceedings relating to the revocation or modification of any such 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.

(xxiii)                  Title to Property .  The Company and its subsidiaries have good and marketable title or have valid rights to lease or otherwise use all real and personal property that is material to the business of the Company, free and clear of all mortgages, pledges, liens, security interests, claims, restrictions or encumbrances of any kind except such as (a) are described in the Registration Statement, the General Disclosure Package or the Prospectus or (b) do not, singly or in the aggregate, materially affect the value of such property and do not materially interfere with the use made and proposed to be made of such property by the Company or its subsidiaries; and all of the leases and subleases material to the business of the Company and its subsidiaries, considered as one enterprise, and under which the Company or its subsidiaries holds properties described in the Registration Statement, the General Disclosure Package or the Prospectus, are in full force and effect, and neither the Company nor any of its subsidiaries has any notice of any material claim of any sort that has been asserted by anyone adverse to the rights of the Company or its subsidiaries under any of the leases or subleases mentioned above.

(xxiv)                 Payment of Taxes .  All United States, Cayman Islands, Irish and other non-U.S., income tax returns (whether federal, state or local) of the Company and its subsidiaries required by law to be filed have been filed and all taxes shown by such tax returns or otherwise assessed, which are due and payable, have been paid, except assessments against which appeals have been or will be promptly taken and as to which adequate reserves have been provided in accordance with GAAP. The United States, Cayman Islands, Irish and other non-U.S., income tax returns (whether federal, state or local) of the Company through the fiscal year ended December 31, 2015 have been settled and no assessment in connection therewith has been made against the Company. The Company and its subsidiaries have filed all other tax returns that are required to have been filed by them pursuant to applicable U.S., Cayman Islands, Irish or other law except insofar as the failure to file such returns would not result in a Material Adverse Effect, and has paid all taxes due pursuant to such returns or pursuant to any assessment received by the Company and its subsidiaries, except for such taxes, if any, as are being contested in good faith and as to which adequate reserves in accordance with GAAP have been established by the Company.

(xxv)                    PFIC . The Company does not expect to be a Passive Foreign Investment Company (“PFIC”) within the meaning of Section 1297(a) of the United States Internal Revenue Code of 1986, as amended, for the 2016 taxable year or subsequent taxable years.

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

(xxvii)              Environmental Laws .  Except as described in the Registration Statement, the General Disclosure Package or the Prospectus and except as would not, singly or in the aggregate, result in a Material Adverse Effect, (A) neither the Company nor any of its subsidiaries is in violation of any 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

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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 and its subsidiaries have all permits, authorizations and approvals required under any applicable Environmental Laws and are each 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, investigation or proceedings relating to any Environmental Law against the Company or any of its subsidiaries 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 body or agency, against or affecting the Company or any of its subsidiaries relating to Hazardous Materials or any Environmental Laws.

(xxviii)           Investor Rights .  Except for such rights as have been satisfied or waived, there are no persons with pre-emptive rights, registration rights or other similar rights to (i) purchase the Securities or (ii) have any securities registered pursuant to the Registration Statement or otherwise registered by the Company under the 1933 Act.

(xxix)                 ERISA .  Except as set forth or incorporated by reference in the General Disclosure Package, neither the Company nor any of its subsidiaries has violated any provisions of the Employee Retirement Income Security Act of 1974, as amended, except for violations which, singly or in the aggregate, would not result in a Material Adverse Effect.

(xxx)                    Insurance .  The Company and its subsidiaries carry or are entitled to the benefits of insurance, with financially sound and reputable insurers, in such amounts and covering such risks as the Company believes is reasonably prudent, and all such insurance is in full force and effect.  The Company has no reason to believe that it or any of its subsidiaries 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.

(xxxi)                 Accounting Controls and Disclosure Controls .  The Company and each of its subsidiaries maintain a system of internal control over financial reporting sufficient to provide reasonable assurance that (1) transactions are executed in accordance with management’s general or specific authorizations; (2) transactions are recorded as necessary to permit preparation of financial statements in conformity with GAAP and to maintain accountability for assets; (3) access to assets is permitted only in accordance with management’s general or specific authorization; and (4) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences; and (5) the interactive data in eXtensible Business Reporting Language incorporated by reference in the Registration Statement, the General Disclosure Package and the Prospectus fairly presents the information called for in all material respects and is prepared in accordance with the Commission’s rules and guidelines applicable thereto. Since the end of the Company’s most recent audited fiscal year, (I) the Company is not aware of any material weakness in the Company’s internal control over financial reporting (whether or not remediated) and (II) there has been no change in the Company’s internal control over financial reporting that has materially

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affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.  The Company and its subsidiaries employ disclosure controls and procedures that are designed to reasonably assure that information required to be disclosed by the Company in the reports that it files or submits under the 1934 Act is recorded, processed, summarized and reported, within the time periods specified in the Commission’s rules and forms, and that material information regarding the Company and its subsidiaries is accumulated and communicated to the Company’s management, including its principal executive officer or officers and principal financial officer or officers, as appropriate, to allow timely decisions regarding disclosure.

(xxxii)              Pending Proceedings and Examinations .  The Registration Statement is not the subject of a pending proceeding or examination under Section 8(d) or 8(e) of the 1933 Act, and the Company is not the subject of a pending proceeding under Section 8A of the 1933 Act in connection with the offering of the Securities.

(xxxiii)           Compliance with the Sarbanes-Oxley Act .  There is and has been no failure on the part of the Company or any of the Company’s directors or officers, in their capacities as such, to comply in all material respects with any provision of the Sarbanes-Oxley Act of 2002 and the rules and regulations promulgated in connection therewith, including Section 402 related to loans and Sections 302 and 906 related to certifications.

(xxxiv)          Trials and Studies .  All preclinical studies and clinical trials conducted by or on behalf of the Company that are material to the Company and its subsidiaries, taken as a whole, have been adequately described in the Registration Statement, the General Disclosure Package and the Prospectus in all material respects. The preclinical studies and clinical trials conducted by or on behalf of the Company were and, if still ongoing, are being conducted in material compliance with all laws and regulations applicable thereto in the jurisdictions in which they are being conducted and with all laws and regulations applicable to preclinical studies and clinical trials from which data will be submitted to support marketing approval. The descriptions in the Registration Statement, the General Disclosure Package and the Prospectus of the results of such studies and trials are accurate and complete in all material respects and fairly present the data derived from such studies, and the Company has no knowledge of any large well-controlled clinical trial the aggregate results of which call into question the results of any clinical trial conducted by or on behalf of the Company that are described in the Registration Statement, the General Disclosure Package and the Prospectus or the results of which are referred to in the Registration Statement, the General Disclosure Package and the Prospectus. Except as disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, the Company has not received any notices or statements from the U.S. Food and Drug Administration (“FDA”) or any comparable non-U.S. regulatory agency (each a “Regulatory Authority”) imposing, requiring, requesting or suggesting a clinical hold, termination, suspension or material modification for or of any preclinical studies or clinical trials that are described in the Registration Statement, the General Disclosure Package and the Prospectus or the results of which are referred to in the Registration Statement, the General Disclosure Package and the Prospectus. Except as disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, the Company has not received any notices or statements from any Regulatory Authority, and otherwise has no knowledge of (1) any investigational new drug application for any potential product of the Company is or has been rejected or determined to be non-approvable or conditionally approvable; and (2) any license, approval, permit or authorization to conduct any clinical trial of any potential product of the Company has been, will be or may be suspended, revoked, materially modified or limited.

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(xxxv)             Regulatory Compliance .  The Company and each of its subsidiaries: (1) are and at all times have been in compliance in all material respects with all statutes, rules, or regulations 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 manufactured or distributed by the Company (“Applicable Laws”); (2) have not received any FDA Form 483, notice of adverse finding, warning letter, untitled letter or other correspondence or notice from any Regulatory Authority alleging or asserting noncompliance with any Applicable Laws or any licenses, certificates, approvals, clearances, authorizations, permits and supplements or amendments thereto required by any such Applicable Laws (“Authorizations”); (3) possess all material Authorizations and such material Authorizations are valid and in full force and effect and are not in violation of any term of any such material Authorizations; (4) have not received notice of any claim, action, suit, proceeding, hearing, enforcement, investigation, arbitration or other action from any governmental authority or third party alleging that any product operation or activity is in violation of any Applicable Laws or Authorizations and, to the knowledge of the Company, no such proceedings are threatened or contemplated by any such governmental authority or third party; (5) have not received notice that any Regulatory Authority has taken, is taking or will take action to limit, suspend, modify or revoke any Authorizations and, to the knowledge of the Company, no such Regulatory Authority has threatened such action; and (6) have 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 Authorizations and that all such material reports, documents, forms, notices, applications, records, claims, submissions and supplements or amendments were complete and correct on the date filed (or were corrected or supplemented by a subsequent submission).

(xxxvi)          Foreign Corrupt Practices Act .  None of the Company, any of its subsidiaries or, to the knowledge of the Company, any director, officer, agent, employee, affiliate or other person acting on behalf of the Company or any of its subsidiaries has taken any action, directly or indirectly, that would result in a violation by such persons of the Foreign Corrupt Practices Act of 1977, as amended, and the rules and regulations thereunder (the “FCPA”), including, without limitation, making use of the mails or any means or instrumentality of interstate commerce corruptly in furtherance of an offer, payment, promise to pay or authorization of the payment of any money, or other property, gift, promise to give, or authorization of the giving of anything of value to any “foreign official” (as such term is defined in the FCPA) or any foreign political party or official thereof or any candidate for foreign political office, in contravention of the FCPA and the Company and, to the knowledge of the Company, its affiliates have conducted their businesses in compliance with the FCPA and have instituted and maintain policies and procedures designed to ensure, and which are reasonably expected to continue to ensure, continued compliance therewith.

(xxxvii)       Anti-Money Laundering Law Compliance . The operations of the Company and its subsidiaries are and have been conducted at all times in material compliance with applicable financial recordkeeping and reporting requirements of the Currency and Foreign Transactions Reporting Act of 1970, as amended, the money laundering statutes of all jurisdictions, the rules and regulations thereunder and any related or similar rules, regulations or guidelines, issued, administered or enforced by any Governmental Entity (collectively, the “Money Laundering Laws”); and no action, suit or proceeding by or before any Governmental Entity involving the Company or any of its subsidiaries with respect to the Money Laundering Laws is pending or, to the knowledge of the Company, threatened.

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(xxxviii)                                                    OFAC .  None of the Company, any of its subsidiaries or, to the knowledge of the Company, any director, officer, agent, employee, affiliate or  representative of the Company or any of its subsidiaries is an individual or entity (“Person”) currently the subject or target of any  sanctions administered or enforced by the United States Government, including, without limitation, the U.S. Department of the Treasury’s Office of Foreign Assets Control (“OFAC”), the United Nations Security Council (“UNSC”), the European Union, Her Majesty’s Treasury (“HMT”), or other relevant sanctions authority (collectively, “Sanctions”), nor is the Company located, organized or resident in a country or territory that is the subject of Sanctions; and the Company will not directly or indirectly use the proceeds of the sale of the Securities, or lend, contribute or otherwise make available such proceeds to any subsidiaries, joint venture partners or other Person, to fund any activities of or business with any Person, or in any country or territory, that, at the time of such funding, is the subject of  Sanctions or 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.

(xxxix)          Lending Relationship .  Except as disclosed in the Registration Statement, the General Disclosure Package or 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.

(xl)                               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.

(xli)                            No Ratings .  The Company has no debt securities or preferred stock that is rated by any “nationally recognized statistical rating agency” (as that term is defined in Section 3(a)(62) of the 1934 Act).

(xlii)                         Valid Choice of Law . The choice of laws of the State of New York as the governing law of this Agreement is a valid choice of law under the laws of the Cayman Islands that will be honored by courts in the Cayman Islands. The Company has the power to submit, and pursuant to Section 18 of this Agreement, has legally,  validly, effectively and irrevocably submitted, to the non-exclusive personal jurisdiction of the Specified Courts (as defined in Section 18 of this Agreement), and the Company has the power to designate, appoint and authorize, and pursuant to Section 18 of this Agreement, has legally, validly, effectively and irrevocably designated, appointed an authorized agent for service of process in any action arising out of or relating to this Agreement or the Securities in any Specified Court, and service of process effected on such authorized agent will be effective to confer valid personal jurisdiction over the Company as provided in Section 18 hereof.

(xliii)                      Enforceability of Judgments . Any final judgment for a fixed sum of money rendered by a Specified Court having jurisdiction under its own domestic laws in respect of any suit, action or proceeding against the Company based upon this Agreement and the Securities would be recognized and enforced against the Company by Cayman Islands courts without re-examining the merits of the case under the common law doctrine of obligation; provided that (i) adequate service of process has been effected and the defendant has had a reasonable opportunity to be heard, (ii) such judgments or the enforcement thereof are not contrary to the law, public policy, security or sovereignty of the Cayman Islands, (iii) such judgments were not obtained by

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fraudulent means and do not conflict with any other valid judgment in the same matter between the same parties, and (iv) an action between the same parties in the same matter is not pending in any Cayman Islands court at the time the lawsuit is instituted in the foreign court; it is not necessary that this Agreement, the Prospectus or any other document be filed or recorded with any court or other authority in the Cayman Islands.

(xliv)                     No Stamp or Transaction Taxes . Except as disclosed in the General Disclosure Package and the Prospectus, no transaction stamp or other issuance, transfer or withholding taxes or duties are payable by or on behalf of each Underwriter to the government of the Cayman Islands, Ireland or any political subdivision or taxing authority thereof or therein in connection with (i) the issuance of the Securities, (ii) the sale and delivery by the Company of the Securities to or for the account of each Underwriter, (iii) the initial resale sale and delivery by each Underwriter of the Securities to purchasers thereof or (iv) the execution, delivery and performance of this Agreement or any other document contemplated hereby; provided , that, this Agreement is not executed in, or after execution, brought within the jurisdiction of the Cayman Islands. The Company confirms it has not executed this Agreement in, nor will it, after execution, bring this Agreement within, the jurisdiction of the Cayman Islands.

(xlv)                        Dividends . Except as disclosed in the General Disclosure Package and the Prospectus, no regulatory approvals are currently required in the Cayman Islands in order for the Company to pay dividends or other distributions declared by the Company to the holders of Securities.  Under current laws and regulations of the Cayman Islands and any political subdivision thereof, any amount payable with respect to the Securities upon liquidation of the Company or upon redemption thereof and dividends and other distributions declared and payable on the share capital of the Company may be paid by the Company in United States dollars and freely transferred out of the Cayman Islands, and no such payments made to the holders thereof or therein who are non-residents of the Cayman Islands will be subject to income, withholding or other taxes under laws and regulations of the Cayman Islands or any political subdivision or taxing authority thereof or therein and without the necessity of obtaining any governmental authorization in the Cayman Islands or any political subdivision or taxing authority thereof or therein.

(b)                                  Officer’s Certificates .  Any certificate signed by any officer of the Company or any of its subsidiaries 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 Securities .  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 share set forth in Schedule A, the aggregate number of Initial Securities set forth in Schedule A opposite the name of such Underwriter, plus any additional number of Initial Securities which such Underwriter may become obligated to purchase pursuant to the provisions of Section 10 hereof, subject to such adjustments as the Representatives in their discretion shall make to eliminate any sales or purchases of fractional Ordinary Shares.

(b)                                  Option Securities.   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 the Option Securities, at the price per share set forth in Schedule A.  The option hereby granted may be exercised for 30 days after the date hereof and

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may be exercised in whole or in part from time to time only for the purpose of covering sales of Ordinary Shares in excess of the number that may be made in connection with the offering and distribution of the Initial Securities upon written notice by the Representatives to the Company setting forth the aggregate number of Option Securities as to which the several Underwriters are then exercising the option and the time and date of payment and delivery for such Option Securities. Any such time and date of delivery (a “Date of Delivery”) shall be determined by the Representatives, but shall not be later than seven full Business Days after the exercise of said option, nor in any event prior to the Closing Time.  If the option is exercised as to all or any portion of the Option Securities, each of the Underwriters, acting severally and not jointly, will purchase that proportion of the number of Option Securities then being purchased which the number of Initial Securities set forth in Schedule A opposite the name of such Underwriter bears to the aggregate number of Initial Securities, subject in each case to such adjustments as the Representatives in their discretion shall make to eliminate any sales or purchases of fractional Ordinary Shares.

(c)                                   Payment .  Payment of the purchase price for, and delivery of, the Initial Securities shall be made at the offices of Davis Polk & Wardwell LLP, Menlo Park, California 94025, 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 (or 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 the “Closing Time”).

In addition, in the event that any or all of the Option Securities are purchased by the Underwriters, payment of the purchase price for, and delivery of, such Option Securities 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 Securities shall be effected by updating the register of members of the Company to reflect the issuance of such Securities.

Payment shall be made to the Company by wire transfer of immediately available funds to a bank account designated by the Company, against delivery to the Representatives for the respective accounts of the Underwriters of the Securities to be purchased by them.  It is understood that each Underwriter has authorized the Representatives, for its account, to accept delivery of, receipt for, and make payment of the purchase price for, the Initial Securities and the Option Securities, if any, which it has agreed to purchase.  Each of the Representatives, individually and not as representative of the Underwriters, may (but shall not be obligated to) make payment of the purchase price for the Initial Securities or the Option Securities, 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.

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 430B, and will notify the Representatives immediately, and confirm the notice in writing, (i) when any post-effective amendment to the Registration Statement shall become effective or any amendment or supplement to the Prospectus 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 or any amendment or supplement to the

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Prospectus, including any document incorporated by reference therein or for additional information, (iv) of the issuance by the Commission of any stop order suspending the effectiveness of the 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 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.  The Company shall pay the required Commission filing fees relating to the Securities within the time required by Rule 456(b)(1)(i) under the 1933 Act Regulations without regard to the proviso therein and otherwise in accordance with Rules 456(b) and 457(r) under the 1933 Act Regulations (including, if applicable, by updating the “Calculation of Registration Fee” table in accordance with Rule 456(b)(1)(ii) either in a post-effective amendment to the Registration Statement or on the cover page of a prospectus filed pursuant to Rule 424(b)).

(b)                                  Continued Compliance with Securities Laws .  The Company will comply with the 1933 Act and the 1934 Act so as to permit the completion of the distribution of the Securities 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 Securities 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 Securities, 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 in order that the 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 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, 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 statement or omission or to make the 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 object unless the Company reasonably believes that the failure to file or use such amendment or supplement would constitute a violation of law or subject it to liability.  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 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 in 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

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unless the Company reasonably believes that the failure to file or use such amendment or supplement would constitute a violation of law or subject it to liability.

(c)                                   Delivery of Registration Statements .  The Company has furnished or will deliver to the Representatives and counsel for the Underwriters, upon request without charge, signed copies of the Registration Statement as originally filed and each amendment thereto (including exhibits filed therewith or incorporated by reference therein and documents incorporated or deemed to be incorporated by reference therein) and signed copies of all consents and certificates of experts, and will also deliver to the Representatives, upon request without charge, a conformed copy of the Registration Statement as originally filed and each amendment thereto (without exhibits) for each of the Underwriters.  The copies of the 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 EDGAR, 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 Securities is (or, but for the exception afforded by Rule 172, would be) required to be delivered under the 1933 Act, 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 EDGAR, except to the extent permitted by Regulation S-T.

(e)                                   Blue Sky Qualifications .  The Company will cooperate with the Underwriters to qualify the Securities for offering and sale under the applicable securities laws of such states and other jurisdictions (domestic or foreign) as the Representatives may designate and to maintain such qualifications in effect for a period of not less than one year from the date hereof; 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 the manner specified in the General Disclosure Package and the Prospectus under “Use of Proceeds.”

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

(i)                                      Restriction on Sale of Securities .  During a period of 90 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 Ordinary Shares or any securities convertible into or exercisable or exchangeable for Ordinary Shares or file any registration statement under the 1933 Act with respect to any of the foregoing or (ii) enter into

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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 Ordinary Shares, whether any such swap or transaction described in clause (i) or (ii) above is to be settled by delivery of Ordinary Shares or such other securities, in cash or otherwise.  The foregoing sentence shall not apply to (A) the Securities to be sold hereunder, the Notes to be issued pursuant to the Concurrent Convertible Notes Offering or the issuance of the underlying Ordinary Shares upon conversion of the Notes, (B) the issuance and sale of Ordinary Shares by the Company to Glaxo Group Limited (together with its affiliates, “GSK”) pursuant to GSK’s exercise of its pro rata rights following the end of each calendar quarter to purchase its pro rata portion of shares issued by the Company in the preceding quarter (other than the Securities, the Notes to be issued in the Concurrent Convertible Notes Offering and the Ordinary Shares to be issued upon conversion of such Notes), (C) any Ordinary Shares issued pursuant to outstanding options, restricted share units (“RSUs”) or other rights under the Company’s existing equity incentive plans, in each case as described in the Registration Statement, the General Disclosure Package and the Prospectus, (D) any options to purchase Ordinary Shares, restricted share awards or RSUs granted under the Company’s equity incentive plans, in each case as described in the Registration Statement, the General Disclosure Package and the Prospectus or as may be subsequently amended or adopted; provided that such options, restricted share awards or RSUs shall not vest or become exercisable prior to the expiration of the lock-up period as described in Exhibit B hereto, (E) any Ordinary Shares issued by the Company upon the exercise of any other option or warrant, settlement of an RSU 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, (F) any Ordinary Shares issued by the Company pursuant to the Company’s Employee Share Purchase Plan as described in the Registration Statement, the General Disclosure Package and the Prospectus, or (G) any Ordinary Shares or other securities convertible into or exercisable or exchangeable for Ordinary Shares issued in connection with any joint venture, marketing or distribution arrangement, collaboration agreement, intellectual property license agreement, co-development agreement, acquisition by the Company or any of its subsidiaries of any business, property or other assets (whether by means of a merger, stock purchase, asset purchase or otherwise) or other strategic transaction, provided that (x) the aggregate number of Ordinary Shares (on an as-converted, as-exercised and as-exchanged basis) that the Company may issue or sell or agree to issue or sell pursuant to this clause (G) shall not exceed 5% of the total number of outstanding Ordinary Shares immediately following the completion of the transactions contemplated by this Agreement, (y) the recipient of any such Ordinary Shares or other securities issued or sold pursuant to this clause (G) during the 90-day restricted period described above shall enter into an agreement substantially in the form of Exhibit B hereto and (z) the Company shall enter stop transfer instructions with the Company’s transfer agent and registrar with respect to such Ordinary Shares and other securities, which the Company agrees it will not waive or amend without the prior written consent of the Representatives.

(j)                                     Reporting Requirements .  The Company, during the period when a Prospectus relating to the Securities 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.

(k)                                  DTC.   The Company will cooperate with the Underwriters to permit the offered Securities to be eligible for clearance and settlement through the facilities of The Depository Trust Company (“DTC”).

(l)                                      Final Term Sheet; Issuer Free Writing Prospectuses.  The Company will prepare a final term sheet (the “Final Term Sheet”), in the form set forth in Schedule C hereto, reflecting the final terms of the Securities, in form and substance satisfactory to the Representatives, and shall file such Final Term Sheet as an “issuer free writing prospectus” pursuant to Rule 433 prior to the close of business two business days after the date hereof; provided that the Company shall furnish the Representatives with

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copies of any such Final Term Sheet a reasonable amount of time prior to such proposed filing and will not use or file any such document to which the Representatives or counsel to the Underwriters shall object. The Company agrees that, unless it obtains the prior written consent of the Representatives, it will not make any offer relating to the Securities 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)                              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 Securities within the meaning of the Securities Act and (ii) completion of the 90-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) as originally filed and each amendment thereto, (ii) the preparation, printing and delivery to the Underwriters of this Agreement and such other documents as may be required in connection with the offering, purchase, sale, issuance or delivery of the Securities, (iii) the preparation, issuance and delivery of the Securities to the Underwriters, including any stock or other transfer taxes, any stamp or other duties payable upon the sale, issuance and 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 Securities under securities laws in accordance with the provisions of Section 3(e) hereof, including filing fees and the reasonable fees and disbursements of counsel for the Underwriters in connection therewith and in connection with the preparation of any blue sky survey and any supplement thereto, (vi) the 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, (vii) the preparation, printing and delivery to the Underwriters of copies of any blue sky survey and any supplement thereto, (viii) all fees and expenses of any transfer agent or registrar for the Securities, (ix) the costs and expenses of the Company relating to investor presentations on any investor presentations undertaken in connection with the marketing of the Securities, including without limitation, expenses associated with the production of road show slides and graphics, fees and expenses of any consultants engaged with the Company’s consent in connection with the investor presentations, travel and lodging expenses of the officers of the Company and any such consultants, and the cost of aircraft and other transportation, if any, chartered in connection with any road

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show, (x) 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,  (xi) the fees and expenses incurred in connection with the listing of the Securities issuable upon conversion of the Securities on The NASDAQ Global Market and (xii) the costs and expenses (including, without limitation, any damages or other amounts payable in connection with legal or contractual liability) 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).  It is understood that, subject to this section, Section 4(b) and Section 6(a), the Underwriters will pay all of their costs and expenses, including fees and disbursements of their counsel, any travel and lodging expenses incurred by them in connection with any investor presentations and any advertising expenses connected with any offers they may make.

(b)                                  Termination of Agreement .  If this Agreement is terminated by the Representatives in accordance with the provisions of Section 5, Section 9(a)(i), Section 9(a)(iii)(x) or Section 11 hereof, the Company shall reimburse the Underwriters for all of their 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 in Section 1 hereof 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 that are required to be performed or satisfied by it at or prior to the Closing Time, and to the following further conditions:

(a)                                  Effectiveness of Registration Statement .  The Registration Statement has become effective and, at the Closing Time, no stop order suspending the effectiveness of the 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.  The Company shall have paid the required Commission filing fees relating to the Securities within the time period required by Rule 456(b)(1)(i) under the 1933 Act Regulations without regard to the proviso therein and otherwise in accordance with Rules 456(b) and 457(r) under the 1933 Act Regulations and, if applicable, shall have updated the “Calculation of Registration Fee” table in accordance with Rule 456(b)(1)(ii) either in a post-effective amendment to the Registration Statement or on the cover page of a prospectus filed pursuant to Rule 424(b).

(b)                                  Opinions of Special U.S. Counsel for Company .  At the Closing Time, the Representatives shall have received an opinion and negative assurance letter, dated as of the Closing Time, of Gunderson Dettmer Stough Villeneuve Franklin & Hachigian, LLP, special U.S. counsel for the Company, in form and substance reasonably satisfactory to counsel for the Underwriters, together with signed or reproduced copies of such letters for each of the Underwriters to the effect set forth in Exhibit A-1, and to such further effect as counsel to the Underwriters may reasonably request.

(c)                                   Opinion of Cayman Counsel for the Company .  At the Closing Time, the Representatives shall have received an opinion, dated as of the Closing Time, of Maples and Calder, Cayman Islands counsel for the Company,  in form and substance reasonably satisfactory to counsel for the Underwriters, together with signed or reproduced copies of such letter for each of the other Underwriters to the effect set forth in Exhibit A-2 hereto, and to such further effect as counsel to the Underwriters may reasonably request.

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(d)                                  Opinion of Counsel for Underwriters .  At the Closing Time, the Representatives shall have received an opinion and negative assurance letter, dated as of the Closing Time, of Davis Polk & Wardwell LLP, counsel for the Underwriters, together with signed or reproduced copies of such letter for each of the other Underwriters in form and substance reasonably satisfactory to the Underwriters.

(e)                                   Material Adverse Change; 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 Prospectus or the General Disclosure Package, any material adverse change in the condition, financial or otherwise, or in the earnings, business affairs or business prospects of the Company and its subsidiaries considered as one enterprise, whether or not arising in the ordinary course of business, and the Representatives shall have received a certificate of the Chief Executive Officer or a Vice President of the Company and of the Chief Financial Officer or Chief Accounting Officer of the Company, dated as of the Closing Time, to the effect that (i) there has been no such material adverse change, (ii) the representations and warranties in Section 1(a) hereof 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 has been issued and no proceedings for that purpose have been instituted or are pending or, to their knowledge, contemplated by the Commission.

(f)                                    Accountant’s Comfort Letter .  At the time of the execution of this Agreement, the Representatives shall have received from Ernst & Young LLP a letter dated such date, in form and substance reasonably 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 as of the Applicable Time.

(g)                                   Bring-down Comfort Letter .  At the Closing Time, the Representatives shall have received from Ernst & Young LLP a letter, dated as of the Closing Time, to the effect that they reaffirm the statements made in the letter furnished pursuant to subsection (f) 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.

(h)                                  Approval of Listing .  At the Closing Time, the Securities shall have been approved for listing on The NASDAQ Global Market, subject only to official notice of issuance.

(i)                                      No Objection .  FINRA has 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.

(j)                                     Lock-up Agreements .  At the date of this Agreement, the Representatives shall have received agreements substantially in the form of Exhibit B hereto signed by the persons listed on Schedule E hereto (the “Lock-up Agreements”).

(k)                                  Chief Financial Officer’s Certificate.   At the time of the execution of this Agreement and at the Closing Time, the Representatives shall have received a certificate, dated as of the date hereof and as of the Closing Time, respectively, from the Chief Financial Officer of the Company in form and substance reasonably satisfactory to the Representatives, together with signed or reproduced copies of such certificate for each of the other Underwriters, to the effect set forth in Exhibit C hereto.

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(l)            Conditions to Purchase of Option Securities .  In the event that the Underwriters exercise their option provided in Section 2(b) hereof to purchase all or any portion of the Option Securities, the representations and warranties of the Company contained herein and the statements in any certificates furnished by the Company and its subsidiaries 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 a Vice President of the Company and of the Chief Financial Officer or Chief Accounting Officer of the Company confirming that the certificate delivered at the Closing Time pursuant to Section 5(e) hereof remains true and correct as of such Date of Delivery.

(ii)           Opinions of Counsel for Company .  An opinion and negative assurance letter of Gunderson Dettmer Stough Villeneuve Franklin & Hachigian, LLP, special U.S. counsel for the Company, and an opinion of Maples and Calder, Cayman Islands counsel for the Company, in form and substance reasonably satisfactory to 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 opinions required by Sections 5(b) and 5(c) and hereof.

(iii)          Opinion of Counsel for Underwriters .  An opinion and negative assurance letter of Davis Polk & Wardwell 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(d) hereof.

(iv)          Bring-down Comfort Letter .  A letter from Ernst & Young LLP, in form and substance reasonably 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(g) hereof, except that the “specified date” in the letter furnished pursuant to this paragraph shall be a date not more than three days prior to such Date of Delivery.

(v)           Chief Financial Officer’s Certificate .  A certificate from the Chief Financial Officer of the Company, dated such Date of Delivery, to the same effect as the certificate required by Section 5(k) hereof.

(m)          Additional Documents .  At the Closing Time, and at each Date of Delivery, counsel for the Underwriters shall have been furnished with such 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.

(n)           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 Securities, on a Date of Delivery which is after the Closing Time, the obligations of the several Underwriters to purchase the relevant Option Securities, may be terminated by the Representatives by written notice to the Company at any time at or prior to the 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, 15, 16, 17, 18, 19 and 20 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

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“Affiliate”), 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 any information deemed to be a part thereof pursuant to Rule 430B, 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 materials or information provided to investors by, or with the approval of, the Company in connection with the marketing of the offering of the Securities (“Marketing Materials”), including any roadshow or investor presentations made to investors by the Company (whether in person or electronically), or the omission or alleged omission in any preliminary prospectus, Issuer Free Writing Prospectus, the Prospectus or in any Marketing Materials 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 reasonably incurred (including the fees and disbursements of counsel chosen by the Representatives), 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 reliance upon and in conformity with written information furnished to the Company by any Underwriter directly or through the Representatives expressly for use in the Registration Statement (or any amendment thereto), including any information deemed to be a part thereof pursuant to Rule 430B, any preliminary prospectus, any Issuer Free Writing Prospectus, 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 (including, without limitation, any legal or other expenses reasonably incurred in connection with defending or investigating any such action or claim), 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 any information deemed to be a part thereof pursuant to Rule 430B, any preliminary prospectus,

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any Issuer Free Writing Prospectus, the General Disclosure Package or the Prospectus (or any amendment or supplement to the foregoing) 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 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 Securities 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 Securities pursuant to this Agreement shall be deemed to be in the same respective proportions as the total net proceeds from the offering of the Securities pursuant to

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this Agreement (before deducting expenses) received by the Company and the total underwriting discount received by the Underwriters, in each case as set forth on the cover of the Prospectus, bear to the aggregate initial public offering price of the Securities 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 amount by which the total price at which the Securities underwritten by it and distributed to the public were offered to the public exceeds the amount of any damages which such Underwriter has otherwise been required to pay by reason of any such untrue or alleged untrue statement or omission or alleged omission.

No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the 1933 Act) 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 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 aggregate number of Securities 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 or any of its subsidiaries 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, 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; General .  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, since the time of execution of this Agreement or since the respective dates as of which information is given in the Registration

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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 and its subsidiaries considered as one enterprise, 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 national 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 market the Securities or to enforce contracts for the sale of the Securities, or (iii) (x) if trading in any securities of the Company has been suspended or materially limited by the Commission or The NASDAQ Global Market, or (y) if trading generally on The New York Stock Exchange or in The NASDAQ Global Market 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 such system or by order of the Commission, FINRA or any other governmental authority, or (iv) if a material disruption has occurred in securities settlement or payment or clearance services in the United States, or (v) if a commercial banking moratorium has been declared by either Federal or New York authorities.

(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, 15, 16, 17, 18, 19 and 20 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:

1.     if the aggregate number of Defaulted Securities does not exceed 10% of the aggregate number of the 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

2.     if the aggregate number of Defaulted Securities exceeds 10% of the aggregate number of the 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 of the Company to sell the Option Securities 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 Securities, as the case may be, either (i) the Representatives or (ii) the Company shall have the right to postpone the Closing Time or the relevant Date of Delivery, as the case may be, for a period not exceeding seven days

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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.        Default by the Company .  If the Company shall fail at the Closing Time or at the Date of Delivery to sell the Securities that it is obligated to sell hereunder, then this Agreement shall terminate without any liability on the part of any non-defaulting party; provided , however , that the provisions of Sections 1, 4, 6, 7, 8, 15, 16, 17, 18, 19 and 20 shall remain in full force and effect.  No action taken pursuant to this Section shall relieve the Company from liability, if any, in respect of such default.

SECTION 12.        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 Partners LLC, One Federal Street, 37th Floor, Boston, MA 02110, Attention: John I. Fitzgerald, Esq. and to Evercore Group L.L.C. 55 East 52nd Street, New York, New York 10055, Attention: Jeff Rosichan.  Notices to the Company shall be directed to Theravance Biopharma, Inc. at 901 Gateway Boulevard, South San Francisco, California 94080, Attention: General Counsel.  In accordance with the requirements of the USA Patriot Act (Title III of Pub. L. 107-56 (signed into law October 26, 2001)), the Underwriters are required to obtain, verify and record information that identifies their respective clients, including the Company, which information may include the name and address of their respective clients, as well as other information that will allow the Underwriters to properly identify their respective clients.

SECTION 13.        No Advisory or Fiduciary Relationship .  The Company acknowledges and agrees that (a) the purchase and sale of the Securities pursuant to this Agreement, including the determination of the public offering price of the Securities 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, (b) in connection with the offering contemplated hereby and the process leading to such transaction 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, (c) no Underwriter has assumed or will assume an advisory or fiduciary responsibility in favor of the Company with respect to the offering contemplated hereby or the process leading thereto (irrespective of whether such Underwriter has advised or is currently advising the Company on other matters) and no Underwriter has any obligation to the Company with respect to the offering contemplated hereby except the obligations expressly set forth in this Agreement, (d) 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 (e) the Underwriters have not provided any legal, accounting, regulatory or tax advice with respect to the offering contemplated hereby and the Company has consulted its own legal, accounting, regulatory and tax advisors to the extent it deemed appropriate.

SECTION 14.        Integration .  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.

SECTION 15.        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

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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 Securities from any Underwriter shall be deemed to be a successor by reason merely of such purchase.

SECTION 16.        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 17.        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.

SECTION 18.        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.  The Company has irrevocably appointed Theravance Biopharma US, Inc. 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 19.        Taxes . All payments to be made by the Company under this Agreement shall be paid free and clear of and without deduction or withholding for or on account of, any present or future taxes, levies, imposts, duties, fees, assessments or other charges of whatever nature, imposed by the Cayman Islands, Ireland, any other jurisdiction in which the Company is organized, doing business or resident for tax purposes or any jurisdiction from or through which a payment is made, or by any department, agency or other political subdivision or taxing authority thereof (each, a “ Taxing Jurisdiction ”), and all interest, penalties or similar liabilities with respect thereto (collectively, “ Taxes ”), except as required by law. If any Taxes are required by law to be deducted or withheld in connection with such payments, the Company will increase the amount paid so that the full amount of such payment is received by the Underwriters, except to the extent that such Taxes were imposed due to any Underwriter or any agent thereof having any present or former connection with a Taxing Jurisdiction other than solely

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as a result of (A) the execution and delivery of, or performance of, its obligations under this Agreement, (B) receiving or paying for the Securities or (C) receiving any payments or enforcing any rights hereunder.

SECTION 20.        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 (net of any premiums and costs of exchange payable in connection with the purchase of United States dollars) 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 21.        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 22.        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 23.        Effect of Headings .  The Section headings herein are for convenience only and shall not affect the construction hereof.

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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.

[ Signature Page to the Underwriting Agreement — Ordinary Shares ]

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

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

[ Signature Page to the Underwriting Agreement — Ordinary Shares ]

Sch A

SCHEDULE B-1

Pricing Information

The information contained in the Final Term Sheet set forth in Schedule C

SCHEDULE B-2

Free Writing Prospectuses

Final Term Sheet

Sch B

SCHEDULE C

Final Term Sheet

Sch C- 1

SCHEDULE D

Subsidiaries

Theravance Biopharma US, Inc. (Delaware)

Theravance Biopharma Antibiotics, Inc. (Cayman Islands)

Theravance Biopharma R&D, Inc. (Cayman Islands)

Theravance Biopharma UK Limited (England and Wales)

Theravance Biopharma Cayman Holdings (Cayman Islands)

Theravance Biopharma Ireland Limited (Ireland)

Sch D- 1

SCHEDULE E

List of Persons and Entities Subject to Lock-up

Exhibit B

FORM OF LOCK-UP TO BE DELIVERED PURSUANT TO SECTION 5(j)

FORM OF LOCK-UP

, 2016

Re:                              Proposed Public Offerings by Theravance Biopharma, Inc.

Ladies and Gentlemen:

The undersigned, a shareholder and an officer and/or director of Theravance Biopharma, Inc., a Cayman Islands exempted company limited by shares (the “Company”), understands that Leerink Partners LLC (“Leerink”) and Evercore Group L.L.C. (“Evercore”) propose to enter into an Underwriting Agreement (the “Equity Underwriting Agreement”) with the Company providing for the public offering (the “Public Equity Offering”) of the Company’s ordinary shares, par value $0.00001 per share (“Ordinary Shares” and, such shares of Ordinary Shares to be sold in the Public Equity Offering, the “Equity Securities”) by the several Underwriters named in Schedule A to the Equity Underwriting Agreement. The undersigned understands that Leerink, Evercore and Piper Jaffray & Co. propose to enter into an Underwriting Agreement (the “Convertible Notes Underwriting Agreement” and, together with the Equity Underwriting Agreement, the “Underwriting Agreements”) with the Company providing for the public offering (the “Convertible Notes Offering” and, together with the Public Equity Offering, the “Public Offerings”) by the several underwriters named in Schedule A to the Convertible Notes Underwriting Agreement of Convertible Senior Notes of the Company (the “Convertible Notes” and, together with the Equity Securities, the “Securities”).

In recognition of the benefit that each such Public Offering will confer upon the undersigned as a shareholder and an officer and/or 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

B- 1

underwriter to be named in the Underwriting Agreements that, during the period beginning on the date hereof and ending on the date that is 90 days from the date of the Underwriting Agreements (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, whether now owned or hereafter acquired by the undersigned or with respect to which the undersigned has or hereafter acquires the power of disposition (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.

Notwithstanding the foregoing, the undersigned may transfer the Lock-Up Securities (i) as a bona fide gift or gifts, provided that the donee or donees thereof agree to be bound in writing by the restrictions set forth herein, (ii) to any trust for the direct or indirect benefit of the undersigned or the immediate family of the undersigned, provided that the trustee of the trust agrees to be bound in writing by the restrictions set forth herein, and provided further that any such transfer shall not involve a disposition for value, or (iii) with the prior written consent of the Representatives, provided , however , that in the case of clauses (i) and (ii), no party, including the undersigned, shall (a) be required to, nor shall it voluntarily, file a report under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), in connection with such transfer (other than a filing on Form 5 made after the expiration of the Lock-Up Period) or (b) otherwise voluntarily effect any public filing, report or announcement of such transfer.  For purposes of this agreement, “immediate family” shall mean any relationship by blood, marriage or adoption, not more remote than first cousin.  In addition, notwithstanding the foregoing, if the undersigned is a corporation, the corporation may transfer the capital shares of the Company to any wholly-owned subsidiary of such corporation; provided , however , that in any such case, it shall be a condition to the transfer that the transferee execute an agreement stating that the transferee is receiving and holding such capital shares subject to the provisions of this agreement and there shall be no further transfer of such capital shares except in accordance with this agreement, and provided further that any such transfer shall not involve a disposition for value.  Further, notwithstanding the foregoing, the undersigned may enter into a new plan to transfer or sell Ordinary Shares pursuant to any contract, instruction or plan complying with Rule 10b5-1 of the rules and regulations of the Securities and Exchange Commission promulgated under the Exchange Act after the date of this agreement (a “New 10b5-1 Plan”); provided , that such New 10b5-1 Plan does not permit transfers or sales of Ordinary Shares, and no transfers or sales of Ordinary Shares pursuant to such plan occur, until on or after the expiration of the Lock-Up Period; and provided , further , that no party, including the undersigned, shall (a) be required to, nor shall it voluntarily, file a report under the Exchange Act in connection with the entry into a New 10b5-1 Plan or (b) otherwise voluntarily effect any public filing, report or announcement of the entry into a New 10b5-1 Plan. Furthermore, the undersigned may (x) surrender Ordinary Shares to the Company upon the vesting or settlement of any restricted share or restricted share unit award of the Company (collectively, “Restricted Shares”) held by the undersigned, provided that such surrender is solely for the purpose of covering the undersigned’s tax withholding liability in connection with the vesting or settlement of such Restricted Shares pursuant to a share withholding program approved by the Company’s Board of Directors or Compensation Committee of the Company’s Board of Directors (the “Compensation Committee”) prior to the date of this agreement or (y) sell Ordinary Shares to cover such tax withholding liability through a broker in accordance with the terms of the applicable equity incentive plan or arrangement approved by the Company’s Board of Directors or Compensation Committee prior to the date hereof; provided that, in each case, if the undersigned is required to file a report under the 1934 Act, during the Lock-Up Period related to such disposition of Ordinary Shares by the undersigned solely

B- 2

to cover the undersigned’s tax withholding liability, the undersigned shall include a statement in such report to the effect that the filing relates to the satisfaction of the undersigned’s tax withholding liability in connection with the vesting or settlement of such Restricted Shares.

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 lock-up letter shall automatically terminate upon the earliest to occur, if any, of (a) the date that the Company advises the Representatives, in writing, prior to the execution of either Underwriting Agreement, that it has determined not to proceed with either Public Offering, (b) termination of both Underwriting Agreements before the closing of the Public Offerings of the Securities, or (c) December 1, 2016 if, and only if, neither of the Public Offerings has been completed by such date.

[ Signature Page Follows ]

B- 3

[ Signature Page to Lock-Up Letter ]

B- 4

Exhibit 1.2

THERAVANCE BIOPHARMA, INC.

(a Cayman Islands exempted company)

$200,000,000 3.250% Convertible Senior Notes due 2023

UNDERWRITING AGREEMENT

Dated: October 27, 2016

THERAVANCE BIOPHARMA, INC.

(a Cayman Islands exempted company)

$200,000,000 3.250% Convertible Senior Notes due 2023

UNDERWRITING AGREEMENT

October 27, 2016

Leerink Partners LLC

Piper Jaffray & Co.

Evercore Group L.L.C.

as Representatives of the several Underwriters named in Schedule A hereto

c/o Leerink Partners LLC

299 Park Avenue, 21st floor

New York, NY 10171

c/o Piper Jaffray & Co.

345 Park Avenue, 12th Fl.

New York, New York 10154

c/o Evercore Group L.L.C.

55 East 52nd Street

New York, New York 10055

Ladies and Gentlemen:

Theravance Biopharma, Inc., a Cayman Islands exempted company (the “Company”), confirms its agreement with Leerink Partners LLC (“Leerink”), Piper Jaffray & Co. (“Piper”) and Evercore Group L.L.C. (“Evercore”) and each of the other Underwriters, if any, 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, Piper 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 the respective principal amounts of 3.250% Convertible Senior Notes due 2023 of the Company (the “Convertible Notes”) set forth in said Schedule A (such aggregate principal amount of the Convertible Notes, the “Initial Securities”), 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 an additional $30,000,000 aggregate principal amount of its 3.250% Convertible Senior Notes due 2023 (the “Option Securities” and, together with the Initial Securities, the “Securities”).  The Securities are to be issued pursuant to an indenture (the “Indenture”) dated on or about November 2, 2016 between the Company and Wells Fargo Bank, National Association, as trustee (the “Trustee”).

Concurrently with the offering of the Securities, the Company is offering its Ordinary Shares (the “Ordinary Shares”) in a separate underwritten public offering (the “Concurrent Equity Offering”) and intends to enter into a separate underwriting agreement with the representatives of the underwriters of such offering, including Leerink and Evercore.

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The Company understands that the Underwriters propose to make a public offering of the Securities as soon as the Representatives deem advisable after this agreement (the “Agreement”) has been executed and delivered and the Indenture has been qualified under the Trust Indenture Act of 1939, as amended (together with the rules and regulations promulgated thereunder, the “1939 Act”).

The Company has prepared and filed with the Securities and Exchange Commission (the “Commission”) an automatic shelf registration statement, including a prospectus, on Form S-3 (File No. 333-214257) covering the public offering and sale of certain securities (the “Shelf Securities”), including the Securities, under the Securities Act of 1933, as amended, and the rules and regulations (the “1933 Act Regulations”) promulgated thereunder (collectively, the “1933 Act”), which became effective under Rule 462(e) under the 1933 Act Regulations (“Rule 462(e)”). Such registration statement, as of any time, means such registration statement as amended by any post-effective amendments thereto to such time, including the information deemed to be a part thereof as of such time pursuant to Rule 430A (“Rule 430A”) or Rule 430B (“Rule 430B”) under the 1933 Act Regulations, is referred to herein as the “Registration Statement;” provided that the “Registration Statement” without reference to a time means such registration statement as amended by any post-effective amendments thereto as of the time of the first contract of sale for the Securities, which time shall be considered the “new effective date” of such registration statement with respect to the Securities within the meaning of paragraph (f)(2) of Rule 430B, including the exhibits and schedules thereto as of such time, the documents incorporated or deemed incorporated by reference therein at such time pursuant to Item 12 of Form S-3 under the 1933 Act and the documents otherwise deemed to be a part thereof as of such time pursuant to the Rule 430B; and the related prospectus covering the Shelf Securities dated October 26, 2016 in the form first used to confirm sales of the Securities (or in the form first made available to the Underwriters by the Company to meet requests of purchasers pursuant to Rule 173 under the Securities Act) is hereinafter referred to as the “Basic Prospectus.”  The Basic Prospectus, as supplemented by the prospectus supplement specifically relating to the Securities in the form first used to confirm sales of the Securities (or in the form first made available to the Underwriters by the Company to meet requests of purchasers pursuant to Rule 173 under the 1933 Act) is hereinafter referred to as the “Prospectus,” and the term “preliminary prospectus” means any preliminary form of the Prospectus. For purposes of this Agreement, all references to the Registration Statement, any preliminary prospectus, the Prospectus or any amendment or supplement to any of the foregoing shall be deemed to refer to and include the amendments incorporated by reference therein pursuant to Item 12 of Form S-3 under the 1933 Act as of the effective date of the Registration Statement or the date of such preliminary prospectus or the Prospectus, as the case may be. All references in this Agreement to amendments or supplements to the Registration Statement, any preliminary prospectus or the Prospectus shall be deemed to include the filing of any document under the Securities Exchange Act of 1934, as amended, and the rules and regulations (the “1934 Act Regulations”) promulgated thereunder (collectively, the “1934 Act”), incorporated or deemed to be incorporated by reference in the Registration Statement, the Preliminary Prospectus or the Prospectus, as the case may be, at or after the execution and delivery of this Agreement.

As used in this Agreement:

“Applicable Time” means 11:30 P.M., New York City time, on October 27, 2016 or such other time as agreed by the Company and the Representatives.

“Business Day” means any day other than a day on which banks are permitted or required to be closed in New York City.

“General Disclosure Package” means any Issuer General Use Free Writing Prospectuses issued at or prior to the Applicable Time and the most recent preliminary prospectus (including

2

any documents incorporated therein by reference) that is distributed to investors prior to the Applicable Time and the information set forth 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, (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), or (iv) any Final Term Sheet (as defined below).

“Issuer General Use Free Writing Prospectus” means any Issuer Free Writing Prospectus that is intended for general distribution to prospective investors, 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.

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 Statement and Prospectuses .  The Company meets the requirements for use of Form S-3 under the 1933 Act.  The Registration Statement is an “automatic shelf registration statement” (as defined in Rule 405) and the Securities have been and remain eligible for registration by the Company on such automatic shelf registration statement. Each of the Registration Statement and any post-effective amendment thereto has become effective under the 1933 Act. No stop order suspending the effectiveness of the 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.  The Company has complied with each request (if any) from the Commission for additional information.

Each of the Registration Statement and any post-effective amendment thereto, at the time of its effectiveness and at each deemed effective date with respect to the Underwriters pursuant to Rule 430B, complied in all material respects with the requirements of the 1933 Act.  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 Regulations. Each preliminary prospectus and the Prospectus delivered to the Underwriters for use in connection with this offering was identical to the electronically transmitted copies thereof filed with the Commission pursuant to EDGAR, except to the extent permitted by Regulation S-T.

The documents incorporated or deemed to be incorporated by reference in the Registration Statement, any preliminary prospectus and the Prospectus, when they became

3

effective or at the time they were or hereafter are filed with the Commission, complied and will comply in all material respects with the requirements of the 1934 Act.

(ii)                                   Accurate Disclosure .  Neither the Registration Statement nor any amendment 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 nor (B) any individual Issuer Limited Use Free Writing Prospectus, when considered together with the General Disclosure Package and (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 documents incorporated or deemed to be incorporated by reference in the Registration Statement, the General Disclosure Package and the Prospectus, at the time the Registration Statement became effective or when such documents incorporated by reference were filed with the Commission, as the case may be, when read together with the other information in the Registration Statement, the General Disclosure Package or the Prospectus, as the case may be, did not and 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.

The representations and warranties in this subsection shall not apply to (i) the Statement of Eligibility (Form T-1) of the Trustee under the 1939 Act or (ii) statements in or omissions from the Registration Statement (or any amendment thereto), the General Disclosure Package or the Prospectus (or any amendment or supplement thereto) 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 the first paragraph under the heading “Underwriting—Underwriting Discounts and Commissions,” the information under the heading “Underwriting—Price Stabilization and Short Positions,” and the information under the heading “Underwriting—Electronic Distribution,” 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, including any document incorporated by reference therein, and any preliminary or other prospectus deemed to be a part thereof that has not been superseded or modified.

(iv)                               Emerging Growth Company Status .  From the time of the initial filing of the Registration Statement with 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 Securities Act (an “Emerging Growth Company”).

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(v)                                  Well-Known Seasoned Issuer . (A) At the original effectiveness of the Registration Statement, (B) at the time of the most recent amendment thereto for the purposes of complying with Section 10(a)(3) of the 1933 Act (whether such amendment was by post-effective amendment, incorporated report filed pursuant to Section 13 or 15(d) of the 1934 Act or form of prospectus), (C) at the time the Company or any person acting on its behalf (within the meaning, for this clause only, of Rule 163(c) under the 1933 Act) made any offer relating to the  Securities in reliance on the exemption of Rule 163 under the 1933 Act, and (D) as of the Applicable Time, the Company was and is a “well-known seasoned issuer” (as defined in Rule 405).

(vi)                               Company Not Ineligible Issuer .  At the time of filing the Registration Statement and any post-effective amendment 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 Securities 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.

(vii)                            Independent Accountants .  Ernst & Young LLP, which audited the financial statements and supporting schedules included or incorporated by reference in the Registration Statement, the General Disclosure Package or the Prospectus, are independent public accountants as required by the 1933 Act, the 1934 Act and the Public Company Accounting Oversight Board.

(viii)                         Financial Statements .  The financial statements included or incorporated by reference in the Registration Statement, the General Disclosure Package and the Prospectus, together with the related schedules and notes, present fairly the financial position of the Company and its consolidated subsidiaries at the dates indicated and the statement of operations, stockholders’ equity and cash flows of the Company and its consolidated subsidiaries for the periods specified; said financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) applied on a consistent basis throughout the periods involved.  The supporting schedules, if any, present fairly in accordance with GAAP the information required to be stated therein.  The selected financial data and the summary financial information included in the General Disclosure Package present fairly the information shown therein and have been compiled on a basis consistent with that of the audited financial statements included therein.  Except as included or incorporated by reference 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.

(ix)                               No Material Adverse Change in Business .  Since the respective dates as of which information is given in the Registration Statement, the General Disclosure Package or the Prospectus, except as otherwise stated therein, (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 and its subsidiaries considered as one enterprise, 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 or any of its subsidiaries, other than those in the ordinary course of business and other than the Concurrent Equity Offering, which are material with respect to the Company and its subsidiaries considered as one enterprise, and (C) except as described in the General Disclosure Package there has been no dividend or distribution of any kind declared, paid or made by the Company on any class of its share capital.

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(x)                                  Good Standing of the Company .  The Company has been duly incorporated and is validly existing as an exempted company in good standing under the laws of the Cayman Islands and 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, the Indenture and the Securities; and the Company is duly qualified as a foreign corporation, partnership or limited liability company, as applicable, 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 so to qualify or to be in good standing would not result in a Material Adverse Effect.

(xi)                               Good Standing of Subsidiaries .  Each “significant subsidiary” of the Company (as such term is defined in Rule 1-02 of Regulation S-X) (each, a “Subsidiary” and, collectively, the “Subsidiaries”) has been duly organized and is validly existing in good standing (or the functional equivalent) under the laws of the jurisdiction of its incorporation or organization, has corporate or similar 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 is duly qualified to transact business and is in good standing in each 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 so qualify or to be in good standing would not result in a Material Adverse Effect.  Except as otherwise disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, all of the issued and outstanding share capital or capital stock of each Subsidiary has been duly authorized and validly issued, is fully paid and non-assessable and is owned by the Company, directly or through subsidiaries, free and clear of any security interest, mortgage, pledge, lien, encumbrance, claim or equity.  None of the outstanding shares of share capital or capital stock of any Subsidiary were issued in violation of the preemptive or similar rights of any securityholder of such Subsidiary.  The only subsidiaries of the Company are (A) the subsidiaries Schedule D hereto and (B) certain other subsidiaries which, considered in the aggregate as a single subsidiary, do not constitute a “significant subsidiary” as defined in Rule 1-02 of Regulation S-X.

(xii)                            Capitalization .  The authorized, issued and outstanding share capital of the Company is 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, pursuant to this Agreement, pursuant to reservations, agreements or employee benefit plans referred to in the Registration Statement, the General Disclosure Package and the Prospectus or pursuant to the exercise of convertible securities or options referred to in the Registration Statement, the General Disclosure Package and the Prospectus).  The issued and outstanding share capital of the Company has been duly authorized and validly issued and are fully paid and non-assessable; none of the issued and outstanding shares of the Company was issued in violation of the preemptive or other similar rights of any securityholder of the Company.

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

(xiv)                        Authorization of the Indenture .  The Indenture has been duly authorized by the Company and duly qualified under the 1939 Act and, when duly executed and delivered by the Company and the Trustee, will constitute a valid and binding agreement of the Company, enforceable against the Company in accordance with its terms, except as the enforcement thereof may be limited by bankruptcy, insolvency (including, without limitation, all laws relating to fraudulent transfers), reorganization, moratorium or similar laws affecting enforcement of

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creditors’ rights generally and except as enforcement thereof is subject to general principles of equity (regardless of whether enforcement is considered in a proceeding in equity or at law).

(xv)                           Authorization of the Securities and the Ordinary Shares . The Securities have been duly authorized and, at the Closing Time, will have been duly executed by the Company and, when authenticated, issued and delivered in the manner provided for in the Indenture and delivered against payment of the purchase price therefor as provided in this Agreement, will constitute valid and binding obligations of the Company, enforceable against the Company in accordance with their terms, except as the enforcement thereof may be limited by bankruptcy, insolvency (including, without limitation, all laws relating to fraudulent transfers), reorganization, moratorium or similar laws affecting enforcement of creditors’ rights generally and except as enforcement thereof is subject to general principles of equity (regardless of whether enforcement is considered in a proceeding in equity or at law), and will be in the form contemplated by, and entitled to the benefits of, the Indenture.  The maximum number of Ordinary Shares, par value $0.00001 per share, issuable upon conversion of the Securities, including the maximum number of Ordinary Shares that may be issued upon conversion of the Securities in connection with a “Make-Whole Fundamental Change” (as defined in the Indenture) (the “Maximum Number of Underlying Shares”) have been duly authorized and reserved for issuance upon such conversion by all necessary corporate action, and such Ordinary Shares, when issued upon such conversion, will be validly issued and will be fully paid and non-assessable. No holder of such Ordinary Shares will be subject to personal liability by reason of being such a holder; and the issuance of such Ordinary Shares upon such conversion will not be subject to the preemptive or other similar rights of any securityholder of the Company. The Securities and the Indenture will conform in all material respects to the respective statements relating thereto contained in the Registration Statement, the General Disclosure Package and the Prospectus and the Securities and the Indenture will be in substantially the respective forms filed or incorporated by reference, as the case may be, as exhibits to the Registration Statement.  The Ordinary Shares conform, in all material respects, to all statements relating thereto contained or incorporated by reference 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.

(xvi)                        Absence of Defaults and Conflicts .  Neither the Company nor any of its subsidiaries is (A) in violation of its memorandum and articles of association, 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 or any of its subsidiaries is a party or by which it or any of them may be bound, or to which any of the property or assets of the Company or any of its subsidiaries is subject (collectively, “Agreements and Instruments”) except for such defaults that would not reasonably be expected to have a Material Adverse Effect, or (C) in violation of any 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 its subsidiaries or any of their respective properties, assets or operations (each, a “Governmental Entity”), except for such violations that would not, single or in the aggregate, result in a Material Adverse Effect; and the execution, delivery and performance of this Agreement, the Indenture and the consummation of the transactions contemplated herein and therein and in the Registration Statement, the General Disclosure Package and the Prospectus (including the issuance and sale of the Securities and the use of the proceeds from the sale of the Securities as described in the Registration Statement, the General Disclosure Package and the Prospectus under the caption “Use of Proceeds,” and the issuance of Ordinary Shares upon conversion of the Securities), and compliance by the Company with its obligations hereunder and

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under the Indenture and the Securities, 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 property or assets of the Company or any of its subsidiaries pursuant to, the Agreements and Instruments (except for such conflicts, breaches, defaults or Repayment Events or liens, charges or encumbrances that would not 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 of its subsidiaries or any applicable 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 or any of its subsidiaries.

(xvii)                     Absence of Labor Dispute .  No labor dispute with the employees of the Company or any of its subsidiaries 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 or its subsidiaries principal suppliers, manufacturers, customers or contractors, which, in either case, would result in a Material Adverse Effect.

(xviii)                  Absence of Proceedings .  There is no claim, action, suit, proceeding, inquiry or investigation before or brought by any court or governmental agency or body, domestic or foreign, now pending, or, to the knowledge of the Company, threatened, against or affecting the Company or any of its subsidiaries, which is required to be disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, or which would reasonably be expected to result in a Material Adverse Effect, or which would reasonably be expected to materially and adversely affect the performance by the Company of its obligations under this Agreement or the Indenture; the aggregate of all pending legal or governmental proceedings to which the Company or any of its subsidiaries is a party or of which any of their respective property 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.

(xix)                        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 the documents incorporated by reference therein or to be filed as exhibits thereto which have not been so described and filed as required.

(xx)                           Possession of Intellectual Property .  The Company owns, or otherwise possesses, sufficient rights to use all patents, patent rights, licenses, inventions, copyrights, know-how (including trade secrets and other unpatented and/or unpatentable proprietary rights), trademarks, service marks, trade names or other intellectual property (collectively, “Intellectual Property”) necessary to carry on the business of the Company as described in the Registration Statement, the General Disclosure Package or the Prospectus, except where the lack of such rights would not result, singly or in the aggregate, in a Material Adverse Effect.  The Company has not received any notice, and is not otherwise aware of any infringement of or conflict with asserted rights of others with respect to any Intellectual Property, or of any valid grounds for any bona fide claim that would render any of the Company’s Intellectual Property rights invalid or inadequate to protect the interests of the Company or its subsidiaries therein, and which infringement or conflict

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(if the subject of any unfavorable decision, ruling or finding) or invalidity or inadequacy, singly or in the aggregate, would result in a Material Adverse Effect.

(xxi)                        Absence of Manipulation .  Neither the Company nor any Affiliate of the Company has taken, nor will the Company or any Affiliate take, directly or indirectly, any action which is designed to or which has constituted or which would be expected to cause or result in stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Securities.

(xxii)                     Absence of Further Requirements .  No filing with, or authorization, approval, consent, license, order, registration, qualification or decree of, any court or governmental authority or agency is necessary or required for the performance by the Company of its obligations hereunder, in connection with the offering, issuance or sale of the Securities hereunder, the issuance of Ordinary Shares upon conversion of the Securities 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 rules of The NASDAQ Stock Market LLC, state securities laws or laws and regulations of jurisdictions outside the United States or the rules of The Financial Industry Regulatory Authority, Inc. (“FINRA”).

(xxiii)                  Possession of Licenses and Permits .  The Company and its subsidiaries possess such permits, licenses, approvals, consents and other authorizations (collectively, “Governmental Licenses”) issued by the appropriate federal, state, local or foreign regulatory agencies or bodies necessary to conduct the business of the Company as described in the Registration Statement, the General Disclosure Package or the Prospectus, except where the failure so to possess would not, singly or in the aggregate, result in a Material Adverse Effect; the Company and its subsidiaries are in compliance with the terms and conditions of all such Governmental Licenses, except where the failure so to comply would not, singly or in the aggregate, result in a Material Adverse Effect; all of the Governmental Licenses are valid and in full force and effect, except when 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 neither the Company nor any of its subsidiaries has received any notice of proceedings relating to the revocation or modification of any such 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.

(xxiv)                 Title to Property .  The Company and its subsidiaries have good and marketable title or have valid rights to lease or otherwise use all real and personal property that is material to the business of the Company, free and clear of all mortgages, pledges, liens, security interests, claims, restrictions or encumbrances of any kind except such as (a) are described in the Registration Statement, the General Disclosure Package or the Prospectus or (b) do not, singly or in the aggregate, materially affect the value of such property and do not materially interfere with the use made and proposed to be made of such property by the Company or its subsidiaries; and all of the leases and subleases material to the business of the Company and its subsidiaries, considered as one enterprise, and under which the Company or its subsidiaries holds properties described in the Registration Statement, the General Disclosure Package or the Prospectus, are in full force and effect, and neither the Company nor any of its subsidiaries has any notice of any material claim of any sort that has been asserted by anyone adverse to the rights of the Company or its subsidiaries under any of the leases or subleases mentioned above.

(xxv)                    Payment of Taxes .  All United States, Cayman Islands, Irish and other non-U.S., income tax returns (whether federal, state or local) of the Company and its subsidiaries required

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by law to be filed have been filed and all taxes shown by such tax returns or otherwise assessed, which are due and payable, have been paid, except assessments against which appeals have been or will be promptly taken and as to which adequate reserves have been provided in accordance with GAAP. The United States, Cayman Islands, Irish and other non-U.S., income tax returns (whether federal, state or local) of the Company through the fiscal year ended December 31, 2015 have been settled and no assessment in connection therewith has been made against the Company. The Company and its subsidiaries have filed all other tax returns that are required to have been filed by them pursuant to applicable U.S., Cayman Islands, Irish or other law except insofar as the failure to file such returns would not result in a Material Adverse Effect, and has paid all taxes due pursuant to such returns or pursuant to any assessment received by the Company and its subsidiaries, except for such taxes, if any, as are being contested in good faith and as to which adequate reserves in accordance with GAAP have been established by the Company.

(xxvi)                 PFIC . The Company does not expect to be a Passive Foreign Investment Company (“PFIC”) within the meaning of Section 1297(a) of the United States Internal Revenue Code of 1986, as amended, for the 2016 taxable year or subsequent taxable years.

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

(xxviii)           Environmental Laws .  Except as described in the Registration Statement, the General Disclosure Package or the Prospectus and except as would not, singly or in the aggregate, result in a Material Adverse Effect, (A) neither the Company nor any of its subsidiaries is in violation of any 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 and its subsidiaries have all permits, authorizations and approvals required under any applicable Environmental Laws and are each 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, investigation or proceedings relating to any Environmental Law against the Company or any of its subsidiaries 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 body or agency, against or affecting the Company or any of its subsidiaries relating to Hazardous Materials or any Environmental Laws.

(xxix)                 Investor Rights .  Except for such rights as have been satisfied or waived, there are no persons with pre-emptive rights, registration rights or other similar rights to (i) purchase the Securities or (ii) have any securities registered pursuant to the Registration Statement or otherwise registered by the Company under the 1933 Act.

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(xxx)                    ERISA .  Except as set forth or incorporated by reference in the General Disclosure Package, neither the Company nor any of its subsidiaries has violated any provisions of the Employee Retirement Income Security Act of 1974, as amended, except for violations which, singly or in the aggregate, would not result in a Material Adverse Effect.

(xxxi)                 Insurance .  The Company and its subsidiaries carry or are entitled to the benefits of insurance, with financially sound and reputable insurers, in such amounts and covering such risks as the Company believes is reasonably prudent, and all such insurance is in full force and effect.  The Company has no reason to believe that it or any of its subsidiaries 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.

(xxxii)              Accounting Controls and Disclosure Controls .  The Company and each of its subsidiaries maintain a system of internal control over financial reporting sufficient to provide reasonable assurance that (1) transactions are executed in accordance with management’s general or specific authorizations; (2) transactions are recorded as necessary to permit preparation of financial statements in conformity with GAAP and to maintain accountability for assets; (3) access to assets is permitted only in accordance with management’s general or specific authorization; and (4) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences; and (5) the interactive data in eXtensible Business Reporting Language incorporated by reference in the Registration Statement, the General Disclosure Package and the Prospectus fairly presents the information called for in all material respects and is prepared in accordance with the Commission’s rules and guidelines applicable thereto. Since the end of the Company’s most recent audited fiscal year, (I) the Company is not aware of any material weakness in the Company’s internal control over financial reporting (whether or not remediated) and (II) there has been no change in the Company’s internal control over financial reporting that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.  The Company and its subsidiaries employ disclosure controls and procedures that are designed to reasonably assure that information required to be disclosed by the Company in the reports that it files or submits under the 1934 Act is recorded, processed, summarized and reported, within the time periods specified in the Commission’s rules and forms, and that material information regarding the Company and its subsidiaries is accumulated and communicated to the Company’s management, including its principal executive officer or officers and principal financial officer or officers, as appropriate, to allow timely decisions regarding disclosure.

(xxxiii)           Pending Proceedings and Examinations .  The Registration Statement is not the subject of a pending proceeding or examination under Section 8(d) or 8(e) of the 1933 Act, and the Company is not the subject of a pending proceeding under Section 8A of the 1933 Act in connection with the offering of the Securities.

(xxxiv)          Compliance with the Sarbanes-Oxley Act .  There is and has been no failure on the part of the Company or any of the Company’s directors or officers, in their capacities as such, to comply in all material respects with any provision of the Sarbanes-Oxley Act of 2002 and the rules and regulations promulgated in connection therewith, including Section 402 related to loans and Sections 302 and 906 related to certifications.

(xxxv)             Trials and Studies .  All preclinical studies and clinical trials conducted by or on behalf of the Company that are material to the Company and its subsidiaries, taken as a whole, have been adequately described in the Registration Statement, the General Disclosure Package

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and the Prospectus in all material respects. The preclinical studies and clinical trials conducted by or on behalf of the Company were and, if still ongoing, are being conducted in material compliance with all laws and regulations applicable thereto in the jurisdictions in which they are being conducted and with all laws and regulations applicable to preclinical studies and clinical trials from which data will be submitted to support marketing approval. The descriptions in the Registration Statement, the General Disclosure Package and the Prospectus of the results of such studies and trials are accurate and complete in all material respects and fairly present the data derived from such studies, and the Company has no knowledge of any large well-controlled clinical trial the aggregate results of which call into question the results of any clinical trial conducted by or on behalf of the Company that are described in the Registration Statement, the General Disclosure Package and the Prospectus or the results of which are referred to in the Registration Statement, the General Disclosure Package and the Prospectus. Except as disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, the Company has not received any notices or statements from the U.S. Food and Drug Administration (“FDA”) or any comparable non-U.S. regulatory agency (each a “Regulatory Authority”) imposing, requiring, requesting or suggesting a clinical hold, termination, suspension or material modification for or of any preclinical studies or clinical trials that are described in the Registration Statement, the General Disclosure Package and the Prospectus or the results of which are referred to in the Registration Statement, the General Disclosure Package and the Prospectus. Except as disclosed in the Registration Statement, the General Disclosure Package and the Prospectus, the Company has not received any notices or statements from any Regulatory Authority, and otherwise has no knowledge of (1) any investigational new drug application for any potential product of the Company is or has been rejected or determined to be non-approvable or conditionally approvable; and (2) any license, approval, permit or authorization to conduct any clinical trial of any potential product of the Company has been, will be or may be suspended, revoked, materially modified or limited.

(xxxvi)          Regulatory Compliance .  The Company and each of its subsidiaries: (1) are and at all times have been in compliance in all material respects with all statutes, rules, or regulations 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 manufactured or distributed by the Company (“Applicable Laws”); (2) have not received any FDA Form 483, notice of adverse finding, warning letter, untitled letter or other correspondence or notice from any Regulatory Authority alleging or asserting noncompliance with any Applicable Laws or any licenses, certificates, approvals, clearances, authorizations, permits and supplements or amendments thereto required by any such Applicable Laws (“Authorizations”); (3) possess all material Authorizations and such material Authorizations are valid and in full force and effect and are not in violation of any term of any such material Authorizations; (4) have not received notice of any claim, action, suit, proceeding, hearing, enforcement, investigation, arbitration or other action from any governmental authority or third party alleging that any product operation or activity is in violation of any Applicable Laws or Authorizations and, to the knowledge of the Company, no such proceedings are threatened or contemplated by any such governmental authority or third party; (5) have not received notice that any Regulatory Authority has taken, is taking or will take action to limit, suspend, modify or revoke any Authorizations and, to the knowledge of the Company, no such Regulatory Authority has threatened such action; and (6) have 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 Authorizations and that all such material reports, documents, forms, notices, applications, records, claims, submissions and supplements or amendments were complete and correct on the date filed (or were corrected or supplemented by a subsequent submission).

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(xxxvii)       Foreign Corrupt Practices Act .  None of the Company, any of its subsidiaries or, to the knowledge of the Company, any director, officer, agent, employee, affiliate or other person acting on behalf of the Company or any of its subsidiaries has taken any action, directly or indirectly, that would result in a violation by such persons of the Foreign Corrupt Practices Act of 1977, as amended, and the rules and regulations thereunder (the “FCPA”), including, without limitation, making use of the mails or any means or instrumentality of interstate commerce corruptly in furtherance of an offer, payment, promise to pay or authorization of the payment of any money, or other property, gift, promise to give, or authorization of the giving of anything of value to any “foreign official” (as such term is defined in the FCPA) or any foreign political party or official thereof or any candidate for foreign political office, in contravention of the FCPA and the Company and, to the knowledge of the Company, its affiliates have conducted their businesses in compliance with the FCPA and have instituted and maintain policies and procedures designed to ensure, and which are reasonably expected to continue to ensure, continued compliance therewith.

(xxxviii)                            Anti-Money Laundering Law Compliance . The operations of the Company and its subsidiaries are and have been conducted at all times in material compliance with applicable financial recordkeeping and reporting requirements of the Currency and Foreign Transactions Reporting Act of 1970, as amended, the money laundering statutes of all jurisdictions, the rules and regulations thereunder and any related or similar rules, regulations or guidelines, issued, administered or enforced by any Governmental Entity (collectively, the “Money Laundering Laws”); and no action, suit or proceeding by or before any Governmental Entity involving the Company or any of its subsidiaries with respect to the Money Laundering Laws is pending or, to the knowledge of the Company, threatened.

(xxxix)          OFAC .  None of the Company, any of its subsidiaries or, to the knowledge of the Company, any director, officer, agent, employee, affiliate or  representative of the Company or any of its subsidiaries is an individual or entity (“Person”) currently the subject or target of any  sanctions administered or enforced by the United States Government, including, without limitation, the U.S. Department of the Treasury’s Office of Foreign Assets Control (“OFAC”), the United Nations Security Council (“UNSC”), the European Union, Her Majesty’s Treasury (“HMT”), or other relevant sanctions authority (collectively, “Sanctions”), nor is the Company located, organized or resident in a country or territory that is the subject of Sanctions; and the Company will not directly or indirectly use the proceeds of the sale of the Securities, or lend, contribute or otherwise make available such proceeds to any subsidiaries, joint venture partners or other Person, to fund any activities of or business with any Person, or in any country or territory, that, at the time of such funding, is the subject of  Sanctions or 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.

(xl)                               Lending Relationship .  Except as disclosed in the Registration Statement, the General Disclosure Package or 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.

(xli)                            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.

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(xlii)                         No Ratings .  The Company has no debt securities or preferred stock that is rated by any “nationally recognized statistical rating agency” (as that term is defined in Section 3(a)(62) of the 1934 Act).

(xliii)                      Valid Choice of Law . The choice of laws of the State of New York as the governing law of this Agreement is a valid choice of law under the laws of the Cayman Islands that will be honored by courts in the Cayman Islands. The Company has the power to submit, and pursuant to Section 18 of this Agreement, has legally,  validly, effectively and irrevocably submitted, to the non-exclusive personal jurisdiction of the Specified Courts (as defined in Section 18 of this Agreement), and the Company has the power to designate, appoint and authorize, and pursuant to Section 18 of this Agreement, has legally, validly, effectively and irrevocably designated, appointed an authorized agent for service of process in any action arising out of or relating to this Agreement or the Securities in any Specified Court, and service of process effected on such authorized agent will be effective to confer valid personal jurisdiction over the Company as provided in Section 18 hereof.

(xliv)                     Enforceability of Judgments . Any final judgment for a fixed sum of money rendered by a Specified Court having jurisdiction under its own domestic laws in respect of any suit, action or proceeding against the Company based upon this Agreement and the Securities would be recognized and enforced against the Company by Cayman Islands courts without re-examining the merits of the case under the common law doctrine of obligation; provided that (i) adequate service of process has been effected and the defendant has had a reasonable opportunity to be heard, (ii) such judgments or the enforcement thereof are not contrary to the law, public policy, security or sovereignty of the Cayman Islands, (iii) such judgments were not obtained by fraudulent means and do not conflict with any other valid judgment in the same matter between the same parties, and (iv) an action between the same parties in the same matter is not pending in any Cayman Islands court at the time the lawsuit is instituted in the foreign court; it is not necessary that this Agreement, the Indenture, the Prospectus or any other document be filed or recorded with any court or other authority in the Cayman Islands.

(xlv)                        No Stamp or Transaction Taxes . Except as disclosed in the General Disclosure Package and the Prospectus, no transaction stamp or other issuance, transfer or withholding taxes or duties are payable by or on behalf of each Underwriter to the government of the Cayman Islands, Ireland or any political subdivision or taxing authority thereof or therein in connection with (i) the issuance of the Securities, (ii) the sale and delivery by the Company of the Securities to or for the account of each Underwriter, (iii) the initial resale sale and delivery by each Underwriter of the Securities to purchasers thereof or (iv) the execution, delivery and performance of this Agreement or any other document contemplated hereby; provided , that, this Agreement is not executed in, or after execution, brought within the jurisdiction of the Cayman Islands. The Company confirms it has not executed this Agreement in, nor will it, after execution, bring this Agreement within, the jurisdiction of the Cayman Islands.

(xlvi)                     Dividends . Except as disclosed in the General Disclosure Package and the Prospectus, no regulatory approvals are currently required in the Cayman Islands in order for the Company to pay dividends or other distributions declared by the Company to the holders of Securities.  Under current laws and regulations of the Cayman Islands and any political subdivision thereof, any amount payable with respect to the Securities upon liquidation of the Company or upon redemption thereof and dividends and other distributions declared and payable on the share capital of the Company may be paid by the Company in United States dollars and freely transferred out of the Cayman Islands, and no such payments made to the holders thereof or therein who are non-residents of the Cayman Islands will be subject to income, withholding or

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other taxes under laws and regulations of the Cayman Islands or any political subdivision or taxing authority thereof or therein and without the necessity of obtaining any governmental authorization in the Cayman Islands or any political subdivision or taxing authority thereof or therein.

(b)                                  Officer’s Certificates .  Any certificate signed by any officer of the Company or any of its subsidiaries 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 Securities .  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 set forth in Schedule A, the aggregate principal amount of Initial Securities set forth in Schedule A opposite the name of such Underwriter, plus any additional principal amount of Initial Securities which such Underwriter may become obligated to purchase pursuant to the provisions of Section 10 hereof, subject to such adjustments as the Representatives in their discretion shall make to ensure that any sales or purchases are in authorized denominations.

(b)                                  Option Securities.   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 the Option Securities, at the price set forth in Schedule A.  The option hereby granted may be exercised for 30 days after the date hereof and may be exercised in whole or in part from time to time only for the purpose of covering sales of Convertible Notes in excess of the principal amount which may be made in connection with the offering and distribution of the Initial Securities upon written notice by the Representatives to the Company setting forth the principal amount of Option Securities as to which the several Underwriters are then exercising the option and the time and date of payment and delivery for such Option Securities. Any such time and date of delivery (a “Date of Delivery”) shall be determined by the Representatives, but shall not be later than seven full Business Days after the exercise of said option, nor in any event prior to the Closing Time.  If the option is exercised as to all or any portion of the Option Securities, each of the Underwriters, acting severally and not jointly, will purchase that proportion of the principal amount of Option Securities then being purchased which the principal amount of Initial Securities set forth in Schedule A opposite the name of such Underwriter bears to the aggregate principal amount of Initial Securities, subject in each case to such adjustments as the Representatives in their discretion shall make to ensure that any sales or purchases are in authorized denominations.

(c)                                   Payment .  Payment of the purchase price for, and delivery of, the Initial Securities shall be made at the offices of Davis Polk & Wardwell LLP, Menlo Park, California 94025, 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 (or 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 the “Closing Time”).

In addition, in the event that any or all of the Option Securities are purchased by the Underwriters, payment of the purchase price for, and delivery of, such Option Securities 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.

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Delivery of the Securities shall be effected by updating the register of members of the Company to reflect the issuance of such Securities.

Payment shall be made to the Company by wire transfer of immediately available funds to a bank account designated by the Company, against delivery to the Representatives for the respective accounts of the Underwriters of the Securities to be purchased by them.  It is understood that each Underwriter has authorized the Representatives, for its account, to accept delivery of, receipt for, and make payment of the purchase price for, the Initial Securities and the Option Securities, if any, which it has agreed to purchase.  Each of the Representatives, individually and not as representative of the Underwriters, may (but shall not be obligated to) make payment of the purchase price for the Initial Securities or the Option Securities, 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)                                  Denominations; Registration .  The Initial Securities and the Option Securities, if any, shall be in such denominations ($1,000 or integral multiples thereof) and registered in such names as the Representatives may request in writing at least two Business Days before the Closing Time or the relevant Date of Delivery, as the case may be.  The global notes representing the Initial Securities and the Option Securities, if any, will be made available for examination and packaging by the Representatives in The City of New York not later than 10:00 A.M. (New York City time) on the Business Day prior to the Closing Time or the relevant 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 430B, and will notify the Representatives immediately, and confirm the notice in writing, (i) when any post-effective amendment to the Registration Statement shall become effective or any amendment or supplement to the Prospectus 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 or any amendment or supplement to the Prospectus, including any document incorporated by reference therein or for additional information, (iv) of the issuance by the Commission of any stop order suspending the effectiveness of the 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 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.  The Company shall pay the required Commission filing fees relating to the Securities within the time required by Rule 456(b)(1)(i) under the 1933 Act Regulations without regard to the proviso therein and otherwise in accordance with Rules 456(b) and 457(r) under the 1933 Act Regulations (including, if applicable, by updating the “Calculation of Registration Fee” table in accordance with Rule 456(b)(1)(ii) either in a post-effective amendment to the Registration Statement or on the cover page of a prospectus filed pursuant to Rule 424(b)).

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(b)                                  Continued Compliance with Securities Laws .  The Company will comply with the 1933 Act and the 1934 Act so as to permit the completion of the distribution of the Securities 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 Securities 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 Securities, 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 in order that the 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 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, 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 statement or omission or to make the 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 object unless the Company reasonably believes that the failure to file or use such amendment or supplement would constitute a violation of law or subject it to liability.  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 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 in 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 unless the Company reasonably believes that the failure to file or use such amendment or supplement would constitute a violation of law or subject it to liability.

(c)                                   Delivery of Registration Statements .  The Company has furnished or will deliver to the Representatives and counsel for the Underwriters, upon request without charge, signed copies of the Registration Statement as originally filed and each amendment thereto (including exhibits filed therewith or incorporated by reference therein and documents incorporated or deemed to be incorporated by reference therein) and signed copies of all consents and certificates of experts, and will also deliver to the Representatives, upon request without charge, a conformed copy of the Registration Statement as originally filed and each amendment thereto (without exhibits) for each of the Underwriters.  The copies of the 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 EDGAR, 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 Securities is (or, but for the exception afforded by Rule 172, would be) required to be delivered under the 1933 Act, 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

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furnished to the Underwriters will be identical to the electronically transmitted copies thereof filed with the Commission pursuant to EDGAR, except to the extent permitted by Regulation S-T.

(e)                                   Blue Sky Qualifications .  The Company will cooperate with the Underwriters to qualify the Securities for offering and sale under the applicable securities laws of such states and other jurisdictions (domestic or foreign) as the Representatives may designate and to maintain such qualifications in effect for a period of not less than one year from the date hereof; 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 the manner specified in the General Disclosure Package and the Prospectus under “Use of Proceeds.”

(h)                                  Listing .  The Company will use its best efforts to effect and maintain the listing of a number of Ordinary Shares equal to the Maximum Number of Underlying Shares on The NASDAQ Global Market.

(i)                                      Restriction on Sale of Securities .  During a period of 90 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 Ordinary Shares or any securities convertible into or exercisable or exchangeable for 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 Ordinary Shares, whether any such swap or transaction described in clause (i) or (ii) above is to be settled by delivery of Ordinary Shares or such other securities, in cash or otherwise.  The foregoing sentence shall not apply to (A) the Securities to be issued hereunder, the Ordinary Shares to be sold pursuant to the Concurrent Equity Offering or the issuance of the underlying Ordinary Shares upon conversion of the Convertible Notes, (B) the issuance and sale of Ordinary Shares by the Company to Glaxo Group Limited (together with its affiliates, “GSK”) pursuant to GSK’s exercise of its pro rata rights following the end of each calendar quarter to purchase its pro rata portion of shares issued by the Company in the preceding quarter (other than the Securities, the Ordinary Shares to be sold pursuant to the Concurrent Equity Offering and the Ordinary Shares to be issued upon conversion of the Securities), (C) any Ordinary Shares issued pursuant to outstanding options, restricted share units (“RSUs”) or other rights under the Company’s existing equity incentive plans, in each case as described in the Registration Statement, the General Disclosure Package and the Prospectus, (D) any options to purchase Ordinary Shares, restricted share awards or RSUs granted under the Company’s equity incentive plans, in each case as described in the Registration Statement, the General Disclosure Package and the Prospectus or as may be subsequently amended or adopted; provided that such options, restricted share awards or RSUs shall not vest or become exercisable prior to the expiration of the lock-up period as described in Exhibit B hereto, (E) any Ordinary Shares issued by the Company upon the exercise of any other option or warrant, settlement of an RSU or the conversion of a security outstanding on the date hereof and referred to in the Registration Statement, the General

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Disclosure Package and the Prospectus, (F) any Ordinary Shares issued by the Company pursuant to the Company’s Employee Share Purchase Plan as described in the Registration Statement, the General Disclosure Package and the Prospectus or (G) any Ordinary Shares or other securities convertible into or exercisable or exchangeable for Ordinary Shares issued in connection with any joint venture, marketing or distribution arrangement, collaboration agreement, intellectual property license agreement, co-development agreement, acquisition by the Company or any of its subsidiaries of any business, property or other assets (whether by means of a merger, stock purchase, asset purchase or otherwise) or other strategic transaction, provided that (x) the aggregate number of Ordinary Shares (on an as-converted, as-exercised and as-exchanged basis) that the Company may issue or sell or agree to issue or sell pursuant to this clause (G) shall not exceed 5% of the total number of outstanding Ordinary Shares immediately following the completion of the transactions contemplated by the underwriting agreement relating to the Concurrent Equity Offering, (y) the recipient of any such Ordinary Shares or other securities issued or sold pursuant to this clause (G) during the 90-day restricted period described above shall enter into an agreement substantially in the form of Exhibit B hereto and (z) the Company shall enter stop transfer instructions with the Company’s transfer agent and registrar with respect to such Ordinary Shares and other securities, which the Company agrees it will not waive or amend without the prior written consent of the Representatives.

(j)                                     Reservation of Securities .  The Company will reserve and keep available at all times, free of preemptive of similar rights, a number of Ordinary Shares equal to the Maximum Number of Underlying Shares, for the purposes of enabling the Company to satisfy any obligations to issue Ordinary Shares upon conversion of the Securities.

(k)                                  Reporting Requirements .  The Company, during the period when a Prospectus relating to the Securities 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.

(l)                                      DTC.   The Company will cooperate with the Underwriters to permit the offered Securities to be eligible for clearance and settlement through the facilities of The Depository Trust Company (“DTC”).

(m)                              Final Term Sheet; Issuer Free Writing Prospectuses.  The Company will prepare a final term sheet (the “Final Term Sheet”), in the form set forth in Schedule C hereto, reflecting the final terms of the Securities, in form and substance satisfactory to the Representatives, and shall file such Final Term Sheet as an “issuer free writing prospectus” pursuant to Rule 433 prior to the close of business two business days after the date hereof; provided that the Company shall furnish the Representatives with copies of any such Final Term Sheet a reasonable amount of time prior to such proposed filing and will not use or file any such document to which the Representatives or counsel to the Underwriters shall object. The Company agrees that, unless it obtains the prior written consent of the Representatives, it will not make any offer relating to the Securities 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

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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.

(n)                                  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 Securities within the meaning of the Securities Act and (ii) completion of the 90-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) as originally filed and each amendment thereto, (ii) the preparation, printing and delivery to the Underwriters of this Agreement, the Indenture, the Securities and such other documents as may be required in connection with the offering, purchase, sale, issuance or delivery of the Securities, (iii) the preparation, issuance and delivery of the Securities to the Underwriters and any Ordinary Shares issuable upon conversion thereof, including any stock or other transfer taxes, any stamp or other duties payable upon the sale, issuance and 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 Securities and the Ordinary Shares issuable upon conversion of the Securities under securities laws in accordance with the provisions of Section 3(e) hereof, including filing fees and the reasonable fees and disbursements of counsel for the Underwriters in connection therewith and in connection with the preparation of any blue sky survey and any supplement thereto, (vi) the 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, (vii) the preparation, printing and delivery to the Underwriters of copies of any blue sky survey and any supplement thereto, (viii) all fees and expenses of the Trustee and any transfer agent or registrar for the Securities or the Ordinary Shares issuable upon conversion of the Securities, (ix) the costs and expenses of the Company relating to investor presentations on any investor presentations undertaken in connection with the marketing of the Securities, including without limitation, expenses associated with the production of road show slides and graphics, fees and expenses of any consultants engaged with the Company’s consent in connection with the investor presentations, travel and lodging expenses of the officers of the Company and any such consultants, and the cost of aircraft and other transportation, if any, chartered in connection with any road show, (x) 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,  (xi) the fees and expenses incurred in connection with the listing of the Ordinary Shares issuable upon conversion of the Securities on The NASDAQ Global Market and (xii) the costs and expenses (including, without limitation, any damages or other amounts payable in connection with legal or contractual liability) 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).  It is understood that, subject to this section, Section 4(b) and Section 6(a), the Underwriters will pay all of their costs and expenses, including fees and disbursements of their counsel, any travel and lodging expenses incurred by them in connection with any investor presentations and any advertising expenses connected with any offers they may make.

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(b)                                  Termination of Agreement .  If this Agreement is terminated by the Representatives in accordance with the provisions of Section 5, Section 9(a)(i), Section 9(a)(iii)(x) or Section 11 hereof, the Company shall reimburse the Underwriters for all of their 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 in Section 1 hereof 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 that are required to be performed or satisfied by it at or prior to the Closing Time, and to the following further conditions:

(a)                                  Effectiveness of Registration Statement .  The Registration Statement has become effective and, at the Closing Time, no stop order suspending the effectiveness of the 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.  The Company shall have paid the required Commission filing fees relating to the Securities within the time period required by Rule 456(b)(1)(i) under the 1933 Act Regulations without regard to the proviso therein and otherwise in accordance with Rules 456(b) and 457(r) under the 1933 Act Regulations and, if applicable, shall have updated the “Calculation of Registration Fee” table in accordance with Rule 456(b)(1)(ii) either in a post-effective amendment to the Registration Statement or on the cover page of a prospectus filed pursuant to Rule 424(b).

(b)                                  Opinions of Special U.S. Counsel for Company .  At the Closing Time, the Representatives shall have received an opinion and negative assurance letter, dated as of the Closing Time, of Gunderson Dettmer Stough Villeneuve Franklin & Hachigian, LLP and an opinion of Shearman & Sterling LLP, each special U.S. counsel for the Company, in form and substance reasonably satisfactory to counsel for the Underwriters, together with signed or reproduced copies of such letters for each of the Underwriters to the effect set forth in Exhibits A-1 and A-2 hereto, respectively, and to such further effect as counsel to the Underwriters may reasonably request.

(c)                                   Opinion of Cayman Counsel for the Company .  At the Closing Time, the Representatives shall have received an opinion, dated as of the Closing Time, of Maples and Calder, Cayman Islands counsel for the Company,  in form and substance reasonably satisfactory to counsel for the Underwriters, together with signed or reproduced copies of such letter for each of the other Underwriters to the effect set forth in Exhibit A-3 hereto, and to such further effect as counsel to the Underwriters may reasonably request.

(d)                                  Opinion of Counsel for Underwriters .  At the Closing Time, the Representatives shall have received an opinion and negative assurance letter, dated as of the Closing Time, of Davis Polk & Wardwell LLP, counsel for the Underwriters, together with signed or reproduced copies of such letter for each of the other Underwriters in form and substance reasonably satisfactory to the Underwriters.

(e)                                   Material Adverse Change; 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 Prospectus or the General Disclosure Package, any material adverse change in the condition, financial or otherwise, or in the earnings, business affairs or business prospects of the Company and its subsidiaries considered as one enterprise, whether or not arising in the ordinary course of business, and the Representatives shall have received a certificate of the Chief Executive Officer or a Vice President of the

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Company and of the Chief Financial Officer or Chief Accounting Officer of the Company, dated as of the Closing Time, to the effect that (i) there has been no such material adverse change, (ii) the representations and warranties in Section 1(a) hereof 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 has been issued and no proceedings for that purpose have been instituted or are pending or, to their knowledge, contemplated by the Commission.

(f)                                    Accountant’s Comfort Letter .  At the time of the execution of this Agreement, the Representatives shall have received from Ernst & Young LLP a letter dated such date, in form and substance reasonably 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 as of the Applicable Time.

(g)                                   Bring-down Comfort Letter .  At the Closing Time, the Representatives shall have received from Ernst & Young LLP a letter, dated as of the Closing Time, to the effect that they reaffirm the statements made in the letter furnished pursuant to subsection (f) 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.

(h)                            Approval of Listing .  At the Closing Time, the number of Ordinary Shares equal to the Maximum Number of Underlying Shares shall have been approved for listing on The NASDAQ Global Market, subject only to official notice of issuance.

(i)                                      No Objection .  FINRA has 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.

(j)                                     Lock-up Agreements .  At the date of this Agreement, the Representatives shall have received agreements substantially in the form of Exhibit B hereto signed by the persons listed on Schedule E hereto (the “Lock-up Agreements”).

(k)                                  Chief Financial Officer’s Certificate.   At the time of the execution of this Agreement and at the Closing Time, the Representatives shall have received a certificate, dated as of the date hereof and as of the Closing Time, respectively, from the Chief Financial Officer of the Company in form and substance reasonably satisfactory to the Representatives, together with signed or reproduced copies of such certificate for each of the other Underwriters, to the effect set forth in Exhibit C hereto.

(l)                                      Conditions to Purchase of Option Securities .  In the event that the Underwriters exercise their option provided in Section 2(b) hereof to purchase all or any portion of the Option Securities, the representations and warranties of the Company contained herein and the statements in any certificates furnished by the Company and its subsidiaries 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 a Vice President of the Company and of the Chief Financial Officer or Chief Accounting Officer of the Company confirming that the certificate delivered at the Closing Time pursuant to Section 5(e) hereof remains true and correct as of such Date of Delivery.

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(ii)                                   Opinions of Counsel for Company .  An opinion and negative assurance letter of Gunderson Dettmer Stough Villeneuve Franklin & Hachigian, LLP, and an opinion of Shearman & Sterling LLP, each special U.S. counsel for the Company, and an opinion of Maples and Calder, Cayman Islands counsel for the Company, in form and substance reasonably satisfactory to 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 opinions required by Sections 5(b) and 5(c) and hereof.

(iii)                                Opinion of Counsel for Underwriters .  An opinion and negative assurance letter of Davis Polk & Wardwell 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(d) hereof.

(iv)                               Bring-down Comfort Letter .  A letter from Ernst & Young LLP, in form and substance reasonably 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(g) hereof, except that the “specified date” in the letter furnished pursuant to this paragraph shall be a date not more than three days prior to such Date of Delivery.

(v)                                  Chief Financial Officer’s Certificate .  A certificate from the Chief Financial Officer of the Company, dated such Date of Delivery, to the same effect as the certificate required by Section 5(k) hereof.

(m)                              Additional Documents .  At the Closing Time, and at each Date of Delivery, counsel for the Underwriters shall have been furnished with such 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.

(n)                                  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 Securities, on a Date of Delivery which is after the Closing Time, the obligations of the several Underwriters to purchase the relevant Option Securities, may be terminated by the Representatives by written notice to the Company at any time at or prior to the 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, 15, 16, 17, 18, 19 and 20 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”), 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 any information deemed to be a part thereof pursuant to Rule 430B, 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

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Testing-the-Waters Communication, the General Disclosure Package or the Prospectus (or any amendment or supplement thereto) or (B) in any materials or information provided to investors by, or with the approval of, the Company in connection with the marketing of the offering of the Securities (“Marketing Materials”), including any roadshow or investor presentations made to investors by the Company (whether in person or electronically), or the omission or alleged omission in any preliminary prospectus, Issuer Free Writing Prospectus, the Prospectus or in any Marketing Materials 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 reasonably incurred (including the fees and disbursements of counsel chosen by the Representatives), 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 reliance upon and in conformity with written information furnished to the Company by any Underwriter directly or through the Representatives expressly for use in the Registration Statement (or any amendment thereto), including any information deemed to be a part thereof pursuant to Rule 430B, any preliminary prospectus, any Issuer Free Writing Prospectus, 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 (including, without limitation, any legal or other expenses reasonably incurred in connection with defending or investigating any such action or claim), 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 any information deemed to be a part thereof pursuant to Rule 430B, any preliminary prospectus, any Issuer Free Writing Prospectus, the General Disclosure Package or the Prospectus (or any amendment or supplement to the foregoing) 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

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

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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 amount by which the total price at which the Securities underwritten by it and distributed to the public were offered to the public exceeds the amount of any damages which such Underwriter has otherwise been required to pay by reason of any such untrue or alleged untrue statement or omission or alleged omission.

No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the 1933 Act) 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 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 aggregate principal amounts of Securities 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 or any of its subsidiaries 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, 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; General .  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, 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 and its subsidiaries considered as one enterprise, 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 national 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 market the Securities or to enforce contracts for the sale of the Securities, or (iii) (x) if trading in any securities of the Company has been suspended or materially limited by the Commission or The NASDAQ Global Market, or (y) if

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trading generally on The New York Stock Exchange or in The NASDAQ Global Market 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 such system or by order of the Commission, FINRA or any other governmental authority, or (iv) if a material disruption has occurred in securities settlement or payment or clearance services in the United States, or (v) if a commercial banking moratorium has been declared by either Federal or New York authorities.

(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, 15, 16, 17, 18, 19 and 20 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:

1.               if the aggregate principal amount of Defaulted Securities does not exceed 10% of the aggregate principal amount of the 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

2.               if the aggregate principal amount of Defaulted Securities exceeds 10% of the aggregate principal amount of the 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 of the Company to sell the Option Securities 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 Securities, as the case may be, either (i) the Representatives or (ii) the Company shall have the right to postpone the 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.                      Default by the Company .  If the Company shall fail at the Closing Time or at the Date of Delivery to sell the Securities that it is obligated to sell hereunder, then this Agreement shall terminate without any liability on the part of any non-defaulting party; provided , however , that the provisions of Sections 1, 4, 6, 7, 8, 15, 16, 17, 18, 19 and 20 shall remain in full force and effect.  No action taken pursuant to this Section shall relieve the Company from liability, if any, in respect of such default.

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SECTION 12.                      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 Partners LLC, One Federal Street, 37th Floor, Boston, Massachusetts 02110, Attention: John I. Fitzgerald, Esq., to Piper Jaffray & Co., 800 Nicollet Mall, Minneapolis, Minnesota 55402, Attention: General Counsel with a copy to Legal, and to Evercore Group L.L.C. 55 East 52nd Street, New York, New York 10055, Attention: Jeff Rosichan.  Notices to the Company shall be directed to Theravance Biopharma, Inc. at 901 Gateway Boulevard, South San Francisco, California 94080, Attention: General Counsel.  In accordance with the requirements of the USA Patriot Act (Title III of Pub. L. 107-56 (signed into law October 26, 2001)), the Underwriters are required to obtain, verify and record information that identifies their respective clients, including the Company, which information may include the name and address of their respective clients, as well as other information that will allow the Underwriters to properly identify their respective clients.

SECTION 13.                      No Advisory or Fiduciary Relationship .  The Company acknowledges and agrees that (a) the purchase and sale of the Securities pursuant to this Agreement, including the determination of the public offering price of the Securities 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, (b) in connection with the offering contemplated hereby and the process leading to such transaction 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, (c) no Underwriter has assumed or will assume an advisory or fiduciary responsibility in favor of the Company with respect to the offering contemplated hereby or the process leading thereto (irrespective of whether such Underwriter has advised or is currently advising the Company on other matters) and no Underwriter has any obligation to the Company with respect to the offering contemplated hereby except the obligations expressly set forth in this Agreement, (d) 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 (e) the Underwriters have not provided any legal, accounting, regulatory or tax advice with respect to the offering contemplated hereby and the Company has consulted its own legal, accounting, regulatory and tax advisors to the extent it deemed appropriate.

SECTION 14.                      Integration .  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.

SECTION 15.                      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 Securities from any Underwriter shall be deemed to be a successor by reason merely of such purchase.

SECTION 16.                      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.

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SECTION 17.                      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.

SECTION 18.                      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.  The Company has irrevocably appointed Theravance Biopharma US, Inc. 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 19.                      Taxes . All payments to be made by the Company under this Agreement shall be paid free and clear of and without deduction or withholding for or on account of, any present or future taxes, levies, imposts, duties, fees, assessments or other charges of whatever nature, imposed by the Cayman Islands, Ireland, any other jurisdiction in which the Company is organized, doing business or resident for tax purposes or any jurisdiction from or through which a payment is made, or by any department, agency or other political subdivision or taxing authority thereof (each, a “ Taxing Jurisdiction ”), and all interest, penalties or similar liabilities with respect thereto (collectively, “ Taxes ”), except as required by law. If any Taxes are required by law to be deducted or withheld in connection with such payments, the Company will increase the amount paid so that the full amount of such payment is received by the Underwriters, except to the extent that such Taxes were imposed due to any Underwriter or any agent thereof having any present or former connection with a Taxing Jurisdiction other than solely as a result of (A) the execution and delivery of, or performance of, its obligations under this Agreement, (B) receiving or paying for the Securities or (C) receiving any payments or enforcing any rights hereunder.

SECTION 20.                      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 (net of any premiums and costs of

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exchange payable in connection with the purchase of United States dollars) 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 21.                      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 22.                      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 23.                      Effect of Headings .  The Section headings herein are for convenience only and shall not affect the construction hereof.

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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.

[ Signature Page to the Underwriting Agreement - Notes ]

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

[ Signature Page to the Underwriting Agreement - Notes ]

SCHEDULE A

The initial public offering price of the Securities shall be 100% of the principal amount thereof, plus accrued interest, if any, from the date of issuance.

The purchase price to be paid by the Underwriters for the Securities shall be 97% of the principal amount thereof.

The interest rate on the Securities shall be 3.250% per annum.

Sch A

SCHEDULE B-1

Pricing Information

The information contained in the Final Term Sheet set forth in Schedule C

SCHEDULE B-2

Free Writing Prospectuses

Final Term Sheet

Sch B

SCHEDULE C

Final Term Sheet

Sch C- 1

SCHEDULE D

Subsidiaries

Theravance Biopharma US, Inc. (Delaware)

Theravance Biopharma Antibiotics, Inc. (Cayman Islands)

Theravance Biopharma R&D, Inc. (Cayman Islands)

Theravance Biopharma UK Limited (England and Wales)

Theravance Biopharma Cayman Holdings (Cayman Islands)

Theravance Biopharma Ireland Limited (Ireland)

Sch D- 1

SCHEDULE E

List of Persons and Entities Subject to Lock-up

Exhibit B

FORM OF LOCK-UP TO BE DELIVERED PURSUANT TO SECTION 5(j)

FORM OF LOCK-UP

, 2016

Leerink Partners LLC

Evercore Group L.L.C.

Piper Jaffray & Co.

as representatives (the “Representatives”) of the several

Underwriters to be named in the Underwriting Agreements

c/o                                Leerink Partners LLC

299 Park Avenue, 21st floor

New York, New York 10171

c/o                                Evercore Group L.L.C.

55 East 52nd Street

New York, New York 10055

c/o                                Piper Jaffray & Co.

345 Park Avenue, 12 th  Fl.

New York, New York 10154

Re:                              Proposed Public Offerings by Theravance Biopharma, Inc.

Ladies and Gentlemen:

The undersigned, a shareholder and an officer and/or director of Theravance Biopharma, Inc., a Cayman Islands exempted company limited by shares (the “Company”), understands that Leerink Partners LLC (“Leerink”) and Evercore Group L.L.C. (“Evercore”) propose to enter into an Underwriting Agreement (the “Equity Underwriting Agreement”) with the Company providing for the public offering (the “Public Equity Offering”) of the Company’s ordinary shares, par value $0.00001 per share (“Ordinary Shares” and, such shares of Ordinary Shares to be sold in the Public Equity Offering, the “Equity Securities”) by the several Underwriters named in Schedule A to the Equity Underwriting Agreement. The undersigned understands that Leerink, Evercore and Piper Jaffray & Co. propose to enter into an Underwriting Agreement (the “Convertible Notes Underwriting Agreement” and, together with the Equity Underwriting Agreement, the “Underwriting Agreements”) with the Company providing for the public offering (the “Convertible Notes Offering” and, together with the Public Equity Offering, the “Public Offerings”) by the several underwriters named in Schedule A to the Convertible Notes Underwriting Agreement of Convertible Senior Notes of the Company (the “Convertible Notes” and, together with the Equity Securities, the “Securities”).

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In recognition of the benefit that each such Public Offering will confer upon the undersigned as a shareholder and an officer and/or 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 Agreements that, during the period beginning on the date hereof and ending on the date that is 90 days from the date of the Underwriting Agreements (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, whether now owned or hereafter acquired by the undersigned or with respect to which the undersigned has or hereafter acquires the power of disposition (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.

Notwithstanding the foregoing, the undersigned may transfer the Lock-Up Securities (i) as a bona fide gift or gifts, provided that the donee or donees thereof agree to be bound in writing by the restrictions set forth herein, (ii) to any trust for the direct or indirect benefit of the undersigned or the immediate family of the undersigned, provided that the trustee of the trust agrees to be bound in writing by the restrictions set forth herein, and provided further that any such transfer shall not involve a disposition for value, or (iii) with the prior written consent of the Representatives, provided , however , that in the case of clauses (i) and (ii), no party, including the undersigned, shall (a) be required to, nor shall it voluntarily, file a report under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), in connection with such transfer (other than a filing on Form 5 made after the expiration of the Lock-Up Period) or (b) otherwise voluntarily effect any public filing, report or announcement of such transfer.  For purposes of this agreement, “immediate family” shall mean any relationship by blood, marriage or adoption, not more remote than first cousin.  In addition, notwithstanding the foregoing, if the undersigned is a corporation, the corporation may transfer the capital shares of the Company to any wholly-owned subsidiary of such corporation; provided , however , that in any such case, it shall be a condition to the transfer that the transferee execute an agreement stating that the transferee is receiving and holding such capital shares subject to the provisions of this agreement and there shall be no further transfer of such capital shares except in accordance with this agreement, and provided further that any such transfer shall not involve a disposition for value.  Further, notwithstanding the foregoing, the undersigned may enter into a new plan to transfer or sell Ordinary Shares pursuant to any contract, instruction or plan complying with Rule 10b5-1 of the rules and regulations of the Securities and Exchange Commission promulgated under the Exchange Act after the date of this agreement (a “New 10b5-1 Plan”); provided , that such New 10b5-1 Plan does not permit transfers or sales of Ordinary Shares, and no transfers or sales of Ordinary Shares pursuant to such plan occur, until on or after the expiration of the Lock-Up Period; and provided , further , that no party, including the undersigned, shall (a) be required to, nor shall it voluntarily, file a report under the Exchange Act in connection with the entry into a New 10b5-1 Plan or (b) otherwise voluntarily effect any public filing, report or announcement of the entry into a New 10b5-1 Plan. Furthermore, the undersigned may (x) surrender Ordinary Shares to the Company upon the vesting or settlement of any restricted share or restricted share unit award of the Company (collectively, “Restricted Shares”) held by the undersigned, provided that such surrender is solely for the purpose of covering the undersigned’s tax withholding liability in connection with the vesting or settlement of such Restricted Shares pursuant to a share withholding program approved by the Company’s Board of Directors or Compensation Committee of the Company’s Board of Directors (the “Compensation Committee”) prior to the date of this agreement or (y) sell Ordinary Shares to cover such tax withholding liability through a broker in accordance with the terms of the applicable equity incentive

B- 2

plan or arrangement approved by the Company’s Board of Directors or Compensation Committee prior to the date hereof; provided that, in each case, if the undersigned is required to file a report under the 1934 Act, during the Lock-Up Period related to such disposition of Ordinary Shares by the undersigned solely to cover the undersigned’s tax withholding liability, the undersigned shall include a statement in such report to the effect that the filing relates to the satisfaction of the undersigned’s tax withholding liability in connection with the vesting or settlement of such Restricted Shares.

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 lock-up letter shall automatically terminate upon the earliest to occur, if any, of (a) the date that the Company advises the Representatives, in writing, prior to the execution of either Underwriting Agreement, that it has determined not to proceed with either Public Offering, (b) termination of both Underwriting Agreements before the closing of the Public Offerings of the Securities, or (c) December 1, 2016 if, and only if, neither of the Public Offerings has been completed by such date.

[ Signature Page Follows ]

B- 3

[ Signature Page to Lock-Up Letter ]

B- 4