BIOMARIN PHARMACEUTICAL INC. (a Delaware Corporation) 8,500,000 Shares of Common Stock (Par Value $0.001 Per Share) PURCHASE AGREEMENT

Exhibit 1.1

BIOMARIN PHARMACEUTICAL INC.

(a Delaware Corporation)

8,500,000 Shares of Common Stock

(Par Value $0.001 Per Share)

PURCHASE AGREEMENT

July 14, 2005

XXXXXXX XXXXX & CO.

Xxxxxxx Lynch, Pierce, Xxxxxx & Xxxxx Incorporated

0 Xxxxx Xxxxxxxxx Xxxxxx

Xxx Xxxx, Xxx Xxxx 00000

Ladies and Gentlemen:

BioMarin Pharmaceutical Inc., a Delaware corporation (the “Company”), confirms its agreement with Xxxxxxx Xxxxx & Co., Xxxxxxx Lynch, Pierce, Xxxxxx & Xxxxx Incorporated (“Xxxxxxx Xxxxx” or the “Underwriter”), with respect to (i) the sale by the Company and the purchase by the Underwriter of 8,500,000 shares of Common Stock, par value $0.001 per share, of the Company (“Common Stock”). The aforesaid 8,500,000 shares of Common Stock are hereinafter called, collectively, the “Securities”.

The Company understands that the Underwriter proposes to make a public offering of the Securities as soon as the Underwriter deems advisable after this Agreement has been executed and delivered.

The Company has prepared and filed in conformity with the requirements of the Securities Act of 1933, as amended (the “Act”), and the published rules and regulations thereunder (the “Rules and Regulations”) adopted by the Securities and Exchange Commission (the “Commission”) a Registration Statement (as hereinafter defined) on Form S-3, as amended (No. 333-102066), relating to the Securities and the offering thereof from time to time in accordance with Rule 415 of the Rules and Regulations, and such amendments thereof as may have been required. The Registration Statement includes a prospectus dated February 21, 2003 (the “Base Prospectus”). The Company has filed the Base Prospectus with the Commission and has filed with, or transmitted for filing to, or shall promptly hereafter file with or transmit for filing to the Commission, a prospectus supplement relating to the Securities in accordance with Rule 424(b) under the Act (the “Final Prospectus Supplement”). The term “Registration Statement” as used in this Agreement means the initial registration statement (including all exhibits, financial schedules and all documents and information deemed to be a part of the Registration Statement (through incorporation by reference or otherwise)), as amended, at the time and on the date it became effective (the “Effective Date”), including the information (if any) contained in the form of final prospectus filed with the Commission pursuant to Rule 424(b) of the Rules and Regulations and deemed to be part thereof at the time of effectiveness pursuant to Rule 430A of the Rules and Regulations. The term “Prospectus” as used in this Agreement means the Base Prospectus together with the Final Prospectus Supplement. As

used herein, the terms “Base Prospectus,” “Prospectus,” “Registration Statement,” and “Final Prospectus Supplement” shall include any documents incorporated by reference therein and any reference to any amendment or supplement to the Registration Statement or the Prospectus shall be deemed to refer to and include any document filed under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), after the date of the Base Prospectus by the Company with the Commission, that is deemed to be incorporated by reference in the Registration Statement or the Prospectus. The Company hereby confirms that the Underwriter, in connection with its duties in such capacity, is authorized to distribute or cause to be distributed the Prospectus (as from time to time amended or supplemented if the Company furnishes amendments or supplements thereto to the Underwriter).

All references in this Agreement to financial statements and schedules and other information which is “contained,” “included” or “stated” in the Registration Statement or the Prospectus (or other references of like import) shall be deemed to mean and include all such financial statements and schedules and other information which is incorporated by reference in the Registration Statement or the Prospectus, as the case may be; and all references in this Agreement to amendments or supplements to the Registration Statement or the Prospectus shall be deemed to mean and include the filing of any document under the Exchange Act which is incorporated by reference in the Registration Statement or the Prospectus, as the case may be.

SECTION 1. Representations and Warranties.

(a) Representations and Warranties by the Company. The Company represents and warrants to the Underwriter as of the date hereof, and as of the Closing Time referred to in Section 2(c) hereof, and agrees with the Underwriter, as follows:

(i) Compliance with Registration Requirements. Each of the Registration Statement and any post-effective amendment thereto has become effective under the Act and no stop order preventing or suspending the use of the Prospectus or suspending the effectiveness of the Registration Statement has been issued under the Act and no proceedings for that purpose have been instituted or are pending or, to the knowledge of the Company, are contemplated by the Commission, and any request received by the Company on the part of the Commission for additional information has been complied with.

On the Effective Date, the Registration Statement complied, and on the date of the Prospectus, the date any post-effective amendment to the Registration Statement becomes effective, the date any Prospectus Supplement or amendment to the Prospectus is filed with the Commission and at the Closing Time, the Registration Statement and the Prospectus will comply, in all material respects, with the requirements of the Act and the Rules and Regulations and the Exchange Act and the published rules and regulations of the Commission thereunder. Neither the Registration Statement nor any amendment or supplement thereto, as of the Effective Date, the date hereof, and the Closing Time, contained or will contain any untrue statement of a material fact or omitted or will omit to state any material fact required to be stated therein or necessary in order to make the statements therein not misleading. On the filing of the Prospectus with the Commission, the date hereof, and the Closing Time, neither the Prospectus nor any amendment thereof or supplement thereto, contained or will contain any untrue statement of a material fact or omitted or will omit to state any material fact required to be stated therein or necessary in order to make the statements therein, in light of the circumstances under which they were made, not misleading. Notwithstanding the foregoing, none of the representations and warranties in this Section 1(a)(i) shall apply to statements in, or omissions from, the Registration Statement or the Prospectus made in reliance upon, and in conformity with, information furnished in writing by the Underwriter expressly for use in the Registration Statement or the Prospectus.

The Prospectus delivered to the Underwriter for use in connection with this offering was identical to the electronically transmitted copies thereof filed with the Commission pursuant to XXXXX, except to the extent permitted by Regulation S-T. The Company has not distributed any offering material in connection with the offering and sale of the Securities, other than the Registration Statement and the Prospectus.

The documents incorporated by reference in the Registration Statement and the Prospectus, at the time they became effective or were filed with the Commission, as the case may be, complied in all material respects with the requirements of the Act or the Exchange Act, as applicable, and the rules and regulations of the Commission thereunder, and at the time they became effective or were filed with the Commission, as the case may be, none of such documents contained an untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading, and any further documents so filed and incorporated by reference in the Registration Statement and the Prospectus, when such documents become effective or are filed with the Commission, as the case may be, will conform in all material respects to the requirements of the Act or the Exchange Act, as applicable, and the rules and regulations of the Commission thereunder and will not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in light of the circumstances under which they are made, not misleading. Notwithstanding anything to the contrary contained in this subsection, the representations and warranties contained in this subsection do not apply to statements or omissions made in reliance upon and in conformity with information furnished in writing to the Company by the Underwriter or any of its agents or representatives expressly for use in the Registration Statement, the Prospectus or any amendment or supplement thereto.

(ii) Independent Accountants. KPMG LLP, which certified the financial statements and supporting schedules included in the Registration Statement or incorporated by reference in the Registration Statement or the Prospectus, is an independent public accountant as required by the Act and the Rules and Regulations and, to the knowledge of the Company, such accountants are not in violation of the auditor independence requirements of the Xxxxxxxx-Xxxxx Act of 2002 and the rules and regulations promulgated thereunder (collectively, the “Xxxxxxxx-Xxxxx Act”).

(iii) Financial Statements. The financial statements included or incorporated by reference in the Registration Statement 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 generally accepted accounting principles (“GAAP”) applied on a consistent basis throughout the periods involved. The supporting schedules included in the Registration Statement present fairly in accordance with GAAP the information required to be stated therein. The selected financial data and the summary financial information included or incorporated by reference in the Prospectus present fairly the information shown therein and have been compiled on a basis consistent with that of the audited financial statements included or incorporated by reference in the Registration Statement. No other financial statements or schedules are required to be included in the Registration Statement or Prospectus. Any disclosures contained in the Registration Statement or the Prospectus regarding “non-GAAP financial measures” (as such term is defined by the rules and regulations of the Commission) comply with Regulation G of the Exchange Act and Item 10 of Regulation S-K under the Act, to the extent applicable. Except as described in the Prospectus or Registration Statement, there are no material off-balance sheet transactions, arrangements, obligations (including contingent

obligations), or any other relationships with unconsolidated entities or other persons, that may have a material current or future effect on the Company’s financial condition, changes in financial condition, results of operations, liquidity, capital expenditures, capital resources or significant components of revenue or expenses.

(iv) No Material Adverse Change in Business. Since the respective dates as of which information is given in the Registration Statement and the Prospectus, except as otherwise stated therein, (A) there has been no material adverse change, or any development that would be reasonably expected to result in a material adverse change, in the condition, financial or otherwise, or in the earnings, business affairs or business prospects of the Company and its subsidiaries taken as a whole, 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, which are material with respect to the Company and its subsidiaries taken as a whole, and (C) there has been no dividend or distribution of any kind declared, paid or made by the Company on any class of its capital stock.

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

(vi) 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”) (A) that is a corporation has been duly organized and is validly existing as a corporation in good standing under the laws of the jurisdiction of its incorporation, has corporate power and authority to own, lease and operate its properties and to conduct its business as described in the Prospectus and is duly qualified as a foreign corporation 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, and (B) that is a limited liability company has been duly formed and is validly existing as a limited liability company in good standing under the laws of the jurisdiction of its formation, has limited liability company power and authority to own, lease and operate its properties and to conduct its business as described in the Prospectus, and is duly qualified as a foreign limited liability company 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 in each case under clause (A) or (B) where the failure so to qualify or to be in good standing would not reasonably be expected to result in a Material Adverse Effect; except as otherwise disclosed in the Registration Statement, all of the issued and outstanding capital stock of each such 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 capital stock of any Subsidiary was issued in violation of the preemptive or similar rights of any securityholder of such Subsidiary. The only subsidiaries of the Company are the subsidiaries listed on Exhibit 21.1 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2004.

(vii) Capitalization. The authorized capital stock of the Company consists of 150,000,000 shares of common stock, par value $0.001 per share (the “Common Stock”), and 1,000,000 shares of preferred stock, par value $0.001 per share, of which 113.676 shares have been designated as Series A Non-Voting Non-Convertible Preferred Stock and 750,000 shares have been designated as Series B Junior Participating Preferred Stock. After giving effect to the transactions contemplated by this Agreement, as of July 13, 2005:

(A) The issued and outstanding capital stock of the Company will consist of 73,374,098 shares of common stock and 113.676 shares of Series A Non-Voting Non-Convertible Preferred Stock;

(B) The Company will have (x) an aggregate of 11,486,011 shares of common stock reserved for issuance upon the exercise of outstanding options granted under the Company’s 1997 Stock Plan and the Company’s 1998 Director Option Plan (collectively, the “Option Plans”), and (y) 8,922,198 shares of common stock reserved for issuance upon conversion of its 3.5% Convertible Subordinated Note due 2008;

(D) The Company will have 356,123 shares of common stock reserved for future purchase by employees of the Company under the Company’s 1998 Employee Stock Purchase Plan.

Since March 31, 2005, the Company has not issued or entered into any commitment to issue subscriptions, options, warrants, convertible or exchangeable securities or other contracts or rights to purchase any shares of the capital stock of the Company or any of its subsidiaries (other than pursuant to the exercise of stock options and warrants to purchase Common Stock outstanding on March 31, 2005, pursuant to the Option Plans and pursuant to the Company’s 1998 Employee Stock Purchase Plan).

All of the shares of issued and outstanding capital stock of the Company have been duly authorized and validly issued and are fully paid and non-assessable; none of the outstanding shares of capital stock of the Company was issued in violation of the preemptive or other similar rights of any securityholder of the Company.

(viii) Authorization of Agreement. The Company has full corporate power and authority to (a) enter into this Agreement and to consummate the transactions contemplated hereby and thereby, and (b) authorize, execute, issue, and deliver the Securities as contemplated by this Agreement. This Agreement has been duly authorized, executed and delivered by the Company, and constitutes the legal and binding obligation of the Company, enforceable in accordance with its terms, except to the extent that rights to indemnity hereunder may be limited by federal or state securities laws and except as such enforceability may be limited by bankruptcy, fraudulent conveyance, insolvency, reorganization or similar laws affecting the rights of creditors generally and subject to general principles of equity.

(ix) Authorization and Description of Securities. The Securities to be purchased by the Underwriter from the Company have been duly authorized for issuance and sale to the Underwriter pursuant to this Agreement and, when issued and delivered by the Company pursuant to this Agreement against payment of the consideration set forth herein, will be validly issued and fully paid and non-assessable; the Common Stock conforms in all material respects to all statements relating thereto contained in the Prospectus and such description conforms in all material respects to the rights set forth in the instruments defining the same; no holder of the Securities will be subject to personal liability by reason of being such a holder; and the issuance of the Securities is not subject to the preemptive or other similar rights of any securityholder of the Company.

(x) Absence of Defaults and Conflicts. Neither the Company nor any of its subsidiaries is (A) in violation of its charter or by-laws, or (B) except for such defaults that would not, individually or in the aggregate, reasonably be expected to result in a Material Adverse Effect, 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 subsidiary is subject (collectively, “Agreements and Instruments”) and the execution, delivery and performance of this Agreement and the consummation of the transactions contemplated herein and in the Registration Statement (including the issuance and sale of the Securities and the use of the proceeds from the sale of the Securities as described in 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 subsidiary pursuant to, the Agreements and Instruments (except for such conflicts, breaches, defaults or Repayment Events or liens, charges or encumbrances that would not be reasonably likely to result in a Material Adverse Effect), nor will such action result in (C) any violation of the provisions of the charter or by-laws of the Company or any subsidiary or (D) except for such defaults that would not, individually or in the aggregate, reasonably be expected to result in a Material Adverse Effect, a violation of any applicable law, statute, rule, regulation, judgment, order, writ or decree of any government, government instrumentality or court, domestic or foreign, having jurisdiction over the Company or any subsidiary or any of their assets, properties or operations. 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 subsidiary of the Company.

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

(xii) Absence of Proceedings. There is no claim, action, suit, proceeding, inquiry, audit, review 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 the Company or any subsidiary of the Company, or, to the knowledge of the Company, otherwise

involving the Company or any subsidiary of the Company which is required to be disclosed in the Registration Statement (other than as disclosed therein), or which would be reasonably likely to result in a Material Adverse Effect, or which would be reasonably likely to materially and adversely affect the consummation of the transactions contemplated in this Agreement or the performance by the Company of its obligations hereunder; the aggregate of all pending legal or governmental proceedings to which the Company or any subsidiary is a party or of which any of their respective property or assets is the subject which are not described in the Registration Statement, including ordinary routine litigation incidental to the business, would not be reasonably likely to result in a Material Adverse Effect.

(xiii) Absence of Rulemaking or Similar Proceedings. To the Company’s knowledge, there are no rulemaking or similar proceedings before the Food and Drug Administration, the Department of Health and Human Services, the Centers for Medicare and Medicaid Services or any other federal, state, local or foreign governmental bodies that regulate the Company’s or any of its subsidiaries’ activities, which would be expected to have a Material Adverse Effect.

(xiv) Accuracy of Descriptions and Exhibits. There are no statutes, regulations, contracts or documents which are required to be described in the Registration Statement or the Prospectus or to be filed as exhibits thereto which have not been so described and filed as required.

(xv) Possession of Intellectual Property. The Company and its subsidiaries own or license or have rights to use, make, sell, and otherwise exploit, all Intellectual Property necessary for the conduct of the Company’s business as now conducted except as such failure to own or license such rights would not have a Material Adverse Effect. Except as set forth in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2004, as amended, which is incorporated by reference into the Registration Statement and Prospectus under the caption “Item 1. Description of Business”, (i) to the knowledge of the Company, there is no infringement, misappropriation or violation by other parties of any Intellectual Property described in the preceding sentence, except as such infringement, misappropriation or violation would not reasonably be expected to have a Material Adverse Effect; (ii) there is no pending, or, to the knowledge of the Company, threatened action, suit, proceeding or claim by others to which the Company or any of its subsidiaries is a party, or to the knowledge of the Company, otherwise challenging the Company’s or its subsidiaries’ rights in or to, or exploitation of, any such Intellectual Property, and the Company has no knowledge of any facts which would form a reasonable basis for any such claim; (iii) except with respect to certain trademarks of the Company which are being opposed, such Intellectual Property owned by the Company and to the knowledge of the Company, such Intellectual Property licensed to the Company have not been adjudged invalid or unenforceable, in whole or in part, and there is no pending or, to the knowledge of the Company, threatened action, suit, proceeding or claim by others challenging the validity or scope of any such Intellectual Property, and the Company has no knowledge of any facts which would form a reasonable basis for any such claim; (iv) there is no pending or to the knowledge of the Company, threatened action, suit, proceeding or claim by others that the Company infringes, misappropriates or otherwise violates any Intellectual Property or other proprietary rights of others, the Company has not received any written notice of such claim and the Company has no knowledge of any other fact which would form a reasonable basis for any such claim; and (v) to the Company’s knowledge, no employee or independent contractor of the Company is in or has ever been in violation of any term of any employment contract, patent disclosure agreement, invention assignment agreement, non-competition agreement, non-solicitation agreement, nondisclosure agreement or any restrictive covenant to or with a former employer or independent contractor where the basis of such violation relates to such employee’s

employment or independent contractor’s engagement with the Company or actions undertaken while employed or engaged with the Company, except as such violation would not reasonably be expected to have a Material Adverse Effect. “Intellectual Property” shall mean all patents, patent rights, patent applications, trade and service marks, trade and service xxxx registrations, trade names, copyrights, licenses, inventions, trade secrets, technology, know-how and other unpatented and/or unpatentable proprietary or confidential information, systems or procedures owned, licensed or used by the Company.

(xvi) 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 (i) have been already obtained or made, (ii) as may be required under the Act or the Rules and Regulations or state securities laws, or (iii) with respect to the listing of the Securities on the SWX Swiss Exchange or the NASDAQ which will be made prior to the Closing.

(xvii) Absence of Manipulation. Neither the Company nor, to the knowledge of the Company any affiliate of the Company has taken, nor will the Company or, to the knowledge of the Company, 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.

(xviii) Possession of Licenses and Permits. The Company and its subsidiaries possess such regulatory and quasi-regulatory 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 now operated by them, except where the failure so to possess would not, singly or in the aggregate, reasonably be expected to 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, reasonably be expected to 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, reasonably be expected to result in a Material Adverse Effect; and neither the Company nor any of its subsidiaries has knowledge of any 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 reasonably be expected to result in a Material Adverse Effect.

(xix) Regulatory Authorities. Except as described in the Prospectus and the Registration Statement, each of the Company and its subsidiaries: (a) is and at all times has been in material compliance 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”); (b) has not received any FDA Form 483, notice of adverse finding, warning letter, untitled letter or other correspondence or notice from the U.S. Food and Drug Administration or any other federal, state or foreign governmental authority having authority over the Company (“Governmental Authority”) alleging or asserting material 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”); (c) possesses all Authorizations and such Authorizations are valid and

in full force and effect and are not in material violation of any term of any such Authorizations; (d) has 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 have no knowledge that any such Governmental Authority or third party is considering any such claim, litigation, arbitration, action, suit, investigation or proceeding; (e) has not received notice that any Governmental Authority has taken, is taking or intends to take action to limit, suspend, modify or revoke any Authorizations and has no knowledge that any such Governmental Authority is considering such action; and (f) has filed, obtained, maintained or submitted all material reports, documents, forms, notices, applications, records, claims, submissions and supplements or amendments as required by any Applicable Laws or Authorizations and that all such reports, documents, forms, notices, applications, records, claims, submissions and supplements or amendments were materially complete and correct on the date filed (or were corrected or supplemented by a subsequent submission).

The studies, tests and preclinical and clinical trials conducted by or on behalf of the Company and each of its subsidiaries were and, if still pending, are being conducted in all material respects in accordance with experimental protocols, procedures and controls pursuant to accepted professional scientific standards and all Applicable Laws and Authorizations, including, without limitation, the Federal Food, Drug and Cosmetic Act and implementing regulations at 21 C.F.R. Parts 50, 54, 56, 58 and 312; the descriptions of the results of such studies, tests and trials contained in the Prospectus and the Registration Statement are accurate and complete in all material respects and fairly present the data derived from such studies, tests and trials; except to the extent disclosed in the Prospectus and the Registration Statement, the Company is not aware of any studies, tests or trials the results of which the Company believes reasonably call into question the study, test, or trial results described or referred to in the Prospectus and the Registration Statement when viewed in the context in which such results are described and the clinical state of development; and neither the Company nor any of its subsidiaries has received any notices or correspondence from any Governmental Authority requiring the termination, suspension or material modification of any studies, tests or preclinical or clinical trials conducted by or on behalf of the Company or any of its subsidiaries.

(xx) Compliance with Health Care Laws. Neither the Company or any subsidiary, nor the Company’s or any subsidiary’s business operations is in violation of any Health Care Laws, except where such violation would not reasonably be expected to result in a Material Adverse Effect. “Health Care Laws” means (i) the federal and state fraud and abuse laws referred to generally or specifically in the Prospectus, including, but not limited to, the federal Anti-Kickback Statute (42 U.S.C. § 1320a-7(b)), the Xxxxx Law (42 U.S.C. § 1395nn and § 1395(q)), the civil False Claims Act (31 U.S.C. § 3729 et seq.), Sections 1320a-7 and 1320a-7a of Title 42 of the United States Code and the regulations promulgated pursuant to such statutes; (ii) the Health Insurance Portability and Accountability Act of 1996 (Pub. L. No. 104-191) and the regulations promulgated thereunder, (iii) Medicare (Title XVIII of the Social Security Act) and the regulations promulgated thereunder; (iv) Medicaid (Title XIX of the Social Security Act) and the regulations promulgated thereunder; (v) the Medicare Prescription Drug, Improvement, and Modernization Act of 2003 (Pub. L. No. 108-173) and the regulations promulgated thereunder; (vi) quality, safety and accreditation requirements of all applicable state laws or regulatory bodies; (vii) any and all other applicable federal, state, or foreign health care laws or regulations, each of (i) through (vii) as may be amended from time to time. Notwithstanding the foregoing or anything herein to the contrary, the Company makes no representations or warranties regarding compliance by the Company’s physician customers with applicable laws.

(xxi) Title to Property. The Company and its Subsidiaries do not own any real property. The Company and its Subsidiaries have good title to all other properties (other than Intellectual Property) owned by them, in each case, 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 Prospectus or (b) would not, singly or in the aggregate, materially adversely affect the value of such property, and do not interfere with the use made and proposed to be made of such property by the Company or any of its subsidiaries; and all of the leases and subleases material to the business of the Company and its subsidiaries, taken as a whole, and under which the Company or any of its subsidiaries holds properties described in the Prospectus, are in full force and effect, and neither the Company nor any subsidiary has any notice of any material claim of any sort that has been asserted by anyone adverse to the rights of the Company or any subsidiary under any of the leases or subleases mentioned above, or affecting or questioning the rights of the Company or such subsidiary to the continued possession of the leased or subleased premises under any such lease or sublease.

(xxii) 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 Prospectus will not be required, to register as an “investment company” under the Investment Company Act of 1940, as amended (the “1940 Act”).

(xxiii) Environmental Laws. Except as described in the Registration Statement and except as would not, singly or in the aggregate, reasonably be expected to 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 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.

(xxiv) Registration Rights. There are no persons with registration rights or other similar rights to have any securities registered pursuant to the Registration Statement or otherwise registered by the Company under the Act.

(xxv) ERISA. Each employee benefit plan, within the meaning of Section 3(3) of the Employee Retirement Income Security Act of 1974, as amended (“ERISA”), that is or has been maintained, administered or contributed to by the Company or any member of any group that includes or has included the Company (as determined under Section 414(b), (c), (m), or (o) of the Internal Revenue Code of 1986, as amended (the “Code”)) (a “Company Affiliate”) for their

employees or former employees has been maintained in compliance in all material respects with its terms and the requirements of any applicable statutes, orders, rules and regulations, including but not limited to ERISA and the Code; no prohibited transaction, within the meaning of Section 406 of ERISA or Section 4975 of the Code, has occurred with respect to any such plan, excluding transactions effected pursuant to a statutory or administrative exemption; and for each such plan that is subject to the funding rules of Section 412 of the Code or Section 302 of ERISA, there has not occurred any “accumulated funding deficiency” within the meaning of Section 412 of the Code or Section 302 of ERISA, respectively, whether or not waived, and the fair market value of the assets of each such plan (excluding for these purposes accrued but unpaid contributions) exceeds the present value of all benefits accrued under such plan determined as of the plan’s most recent actuarial report using the actuarial assumptions set forth therein, and such actuarial assumptions are reasonable in the aggregate. Neither the Company nor any Company Affiliate has incurred or is reasonably expected to incur any liability to any “multiemployer plan” within the meaning of Section 3(37) or 4001(a)(3) of ERISA. Neither the Company nor any Company Affiliate has incurred or is reasonably expected to incur any liability under any “welfare plan” within the meaning of Section 3(1) of ERISA that provides benefits to retired or terminated employees (other than as required by Section 4980B of the Code or Title I, Subtitle B, Part 6 of ERISA).

(xxvi) Accounting Controls. The Company and its subsidiaries maintain a system of internal accounting controls sufficient to provide reasonable assurances that (i) transactions are executed in accordance with management’s general or specific authorization; (ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with generally accepted accounting principles and to maintain accountability for assets; (iii) access to assets is permitted only in accordance with management’s general or specific authorization; and (iv) the recorded accountability for assets is compared with existing assets at reasonable intervals and appropriate action is taken with respect to any differences.

(xxvii) Insurance. The Company and its subsidiaries carry, or are covered by, insurance issued by insurers of nationally recognized financial responsibility in such amounts and covering such risks as is reasonably adequate for the conduct of its business and the value of its properties and as is customary for companies engaged in similar businesses in similar industries; and neither the Company nor any of its subsidiaries has (i) received written notice from any insurer or agent of such insurer that capital improvements or other expenditures are required or necessary to be made in order to continue such insurance or (ii) any reason to believe that it will not be able to renew its existing insurance coverage as and when such coverage expires or to obtain similar coverage at reasonable cost from similar insurers as may be necessary to continue its business. All such insurance is outstanding and duly in force on the date hereof.

(xxviii) Related Party Transactions. No relationship, direct or indirect, exists between or among the Company or any of its subsidiaries, on the one hand, and the directors, officers, stockholders, customers or suppliers of the Company or any of its subsidiaries, on the other, that is required by the Act to be described in the Registration Statement and the Prospectus and that is not so described therein.

(xxix) Foreign Corrupt Practices Act. Neither the Company nor any of its subsidiaries nor, to the knowledge of the Company, any director, officer, agent, employee acting on behalf of the Company or any of its subsidiaries has (i) used any corporate funds for any unlawful contribution, gift, entertainment or other unlawful expense relating to political activity; (ii) made any direct or indirect unlawful payment to any foreign or domestic government official or employee from corporate funds; (iii) violated or is in violation of any provision of the Foreign

Corrupt Practices Act of 1977; or (iv) made any bribe, rebate, payoff, influence payment, kickback or other unlawful payment.

(xxx) Statistical and Market Data. Nothing has come to the attention of the Company that has caused the Company to believe that the statistical and market-related data included in the Registration Statement and the Prospectus is not based on or derived from sources that are reliable and accurate in all material respects.

(xxxi) Xxxxxxxx-Xxxxx Act. There has been no failure on the part of the Company or to the knowledge of the Company, on the part of any of the Company’s directors or officers, in their capacities as such, to comply in all material respects with any applicable provision of the Xxxxxxxx-Xxxxx Act, including without limitation Section 402 related to loans.

(xxxii) Xxxxxxx Xxxxxxx. The Company has a written xxxxxxx xxxxxxx policy applicable to all officers and directors of the Company. Unless the Underwriter otherwise agrees, in its sole discretion and in writing, prior to the 90th day following the Closing Time, the Company will not waive the terms of its xxxxxxx xxxxxxx policy.

(xxxiii) Certifications. The Chief Executive Officer and the Chief Financial Officer of the Company have signed, and the Company has furnished to the Commission, all certifications required by Sections 302 and 906 of the Xxxxxxxx-Xxxxx Act. Such certifications contain no qualifications or exceptions to the matters certified therein other than such qualifications or exceptions as are part of the standard form of certification promulgated by the Commission, and have not been modified or withdrawn; and neither the Company nor any of its officers has received notice from any governmental entity questioning or challenging the accuracy, completeness, form or manner of filing or submission of such certifications. The Company is otherwise in compliance in all material respects with all applicable provisions currently in effect of the Xxxxxxxx-Xxxxx Act and the rules and regulations issued thereunder by the Commission.

(xxxiv) Audit Committee/Internal Controls. The Company’s board of directors has validly appointed an audit committee whose composition satisfies the requirements of Rule 4350(d)(2) of the Rules of the NASD (the “NASD Rules”) and the Company’s board of directors and/or the audit committee has adopted a charter that satisfies the requirements of Rule 4350(d)(1) of the NASD Rules. Neither the Company’s board of directors nor the audit committee has been informed, nor is any director of the Company aware, of (x) any significant deficiencies in the design or operation of the Company’s internal controls that could adversely affect the Company’s ability to record, process, summarize and report financial data or any material weakness in the Company’s internal controls; or (y) any fraud, whether or not material, that involves management or other employees of the Company who have a significant role in the Company’s internal controls.

(xxxv) Taxes. The Company and each of its subsidiaries have timely filed all federal, state, local and foreign income and franchise tax returns required to be filed and is not in default in the payment of any taxes which were payable pursuant to said returns or any assessments with respect thereto, other than any which the Company or any of its subsidiaries is contesting in good faith. There is no pending dispute with any taxing authority relating to any of such returns and the Company has no knowledge of any proposed liability for any tax to be imposed upon the properties or assets of the Company or any of its subsidiaries for which there is not an adequate reserve reflected in the Company’s financial statements included in the Registration Statement.

(xxxvi) Listing on NASDAQ and SWX Swiss Exchange. The Common Stock of the Company is listed on the NASDAQ under the ticker symbol “BMRN”, and on the SWX Swiss Exchange under the ticker symbol “BMRN”. The Company has not received any notice that it is not in compliance with the listing requirements of the NASDAQ or the SWX Swiss Exchange. The Company is, and has no reason to believe that it will not in the foreseeable future continue to be (except as a result of minimum trading price requirements), in compliance with all such listing requirements. There are no affiliations with the NASD or the SWX Swiss Exchange among the Company’s officers or directors. A registration statement relating to the Common Stock on Form 8-A or other applicable form under the Exchange Act has become effective.

(xxxvii) Absence of Changes. Since December 31, 2004, except as disclosed on the Company’s quarterly report filed on form 10-Q for the fiscal quarter ended March 31, 2005, or as disclosed on a Form 8-K filed since March 31, 2005, the business and operations of the Company have been conducted in the ordinary course consistent with past practice, and there has not been:

(A) any declaration, setting aside or payment of any dividend or other distribution of the assets of the Company with respect to any shares of capital stock of the Company or any repurchase, redemption or other acquisition by the Company or any subsidiary of the Company of any outstanding shares of the Company’s capital stock;

(B) any damage, destruction or loss, whether or not covered by insurance, except for such occurrences, individually and collectively, that have not had, and would not reasonably be expected to result in, a Material Adverse Effect;

(C) any waiver by the Company of a valuable right or of a material debt owed to it, except for such waivers, individually and collectively, that have not had, and would not reasonably be expected to result in, a Material Adverse Effect;

(D) the incurrence of any liability or obligation, direct or contingent, for borrowed money, other than trade payable financing incurred in the ordinary course of business consistent with past practice; or

(E) any change by the Company in its accounting principles, methods or practices or in the manner in which it keeps its accounting books and records, except any such change required by a change in GAAP or by the Commission.

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

SECTION 2. Sale and Delivery to Underwriter; Closing.

(a) 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 the Underwriter, and the Underwriter agrees to purchase from the Company, at the price per share set forth in Schedule B, that number of Securities set forth in Schedule A.

(b) Payment. Payment of the purchase price for, and delivery of certificates for, the Securities shall be made at the offices of Paul, Hastings, Xxxxxxxx & Xxxxxx, LLP, 55 Second Street, Twenty Fourth Floor, San Francisco, California, or at such other place as shall be agreed upon by the Underwriter and the Company, at 9:00 A.M. (Eastern time) on the third (fourth, if the pricing occurs after

4:30 P.M. (Eastern time) on any given day) business day after the date hereof, or such other time not later than ten business days after such date as shall be agreed upon by the Underwriter and the Company (such time and date of payment and delivery being herein called “Closing Time”).

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 Underwriter of certificates for the Securities to be purchased by them.

(c) Denominations; Registration. Certificates for the Securities shall be in such denominations and registered in such names as the Underwriter may request in writing at least two full business days before the Closing Time. The certificates for the Securities will be made available for examination and packaging by the Underwriter in The City of New York not later than 10:00 A.M. (Eastern time) on the business day prior to the Closing Time.

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

(a) Compliance with Securities Regulations and Commission Requests. The Company, subject to Section 3(b), will comply with the requirements of Rule 430A or Rule 424, as applicable, and will notify the Underwriter promptly, and confirm the notice in writing, (i) when any post-effective amendment to the Registration Statement shall become effective, or any supplement to the Prospectus or any amended 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 or for additional information, and (iv) of the issuance by the Commission of any stop order suspending the effectiveness of the Registration Statement or of any order preventing or suspending the use of 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. The Company will promptly effect the filings necessary pursuant to Rule 424(b) 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 and, if any stop order is issued, to obtain the lifting thereof at the earliest possible moment.

(b) Filing of Amendments. The Company will give the Underwriter notice of its intention to file or prepare any amendment to the Registration Statement (including any filing under Rule 462(b)) or any amendment, supplement or revision to the Prospectus, will furnish the Underwriter with copies of any such documents a reasonable amount of time prior to such proposed filing or use, as the case may be, and will not file or use any such document to which the Underwriter or counsel for the Underwriter shall reasonably object in writing, except as required pursuant to legal or administrative order or process.

(c) Delivery of Registration Statements. The Company has furnished or will deliver to the Underwriter and counsel for the Underwriter, without charge, signed copies of the Registration Statement as originally filed and of each amendment thereto (including exhibits filed therewith or incorporated by reference therein) and signed copies of all consents and certificates of experts, and will also deliver to the Underwriter, without charge, a conformed copy of the Registration Statement as originally filed and of each amendment thereto (without exhibits). The copies of the Registration Statement and each amendment thereto furnished to the Underwriter

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

(d) Delivery of Prospectuses. The Company will furnish to the Underwriter, without charge, during the period when the Prospectus is required to be delivered under the Act, such number of copies of the Prospectus (as amended or supplemented) as the Underwriter may reasonably request. The Prospectus and any amendments or supplements thereto furnished to the Underwriter will be identical to the electronically transmitted copies thereof filed with the Commission pursuant to XXXXX, except to the extent permitted by Regulation S-T.

(e) Continued Compliance with Securities Laws. The Company will comply with the Act and the Rules and Regulations so as to permit the completion of the distribution of the Securities as contemplated in this Agreement and in the Prospectus. If at any time when a prospectus is required by the 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 Underwriter or for the Company, to amend the Registration Statement or amend or supplement the Prospectus in order that the Prospectus will not include any untrue statements 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 if it shall be necessary, in the opinion of such counsel, at any such time to amend the Registration Statement or amend or supplement the Prospectus in order to comply with the requirements of the Act or the Rules and Regulations, the Company will promptly prepare and file with the Commission, subject to Section 3(b), such amendment or supplement as may be necessary to correct such statement or omission or to make the Registration Statement or the Prospectus comply with such requirements, and the Company will furnish to the Underwriter such number of copies of such amendment or supplement as the Underwriter may reasonably request.

(f) Blue Sky Qualifications. The Company will use its best efforts, in cooperation with the Underwriter, to qualify the Securities for offering and sale under the applicable securities laws of such states and other domestic, or if applicable, foreign, jurisdictions as the Underwriter may designate and to maintain such qualifications in effect for a period of not less than one year from the later of the effective date of the Registration Statement and any Rule 462(b) Registration Statement; 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.

(g) Rule 158. The Company will timely file such reports pursuant to the Exchange 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 the benefits contemplated by, the last paragraph of Section 11(a) of the Act.

(h) Compliance with Registration Statement. The Company will comply with all the undertakings contained in the Registration Statement.

and after reasonable notification to the Underwriter (giving effect to the basis of such required disclosure), such press release or communication is required by law.

(i) 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 Prospectus under “Use of Proceeds”.

(j) Restriction on Sale of Securities. During a period of ninety (90) days from the date of the Final Prospectus Supplement, the Company will not, without the prior written consent of the Underwriter, (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 share of Common Stock or any securities convertible into or exercisable or exchangeable for Common Stock or file any registration statement under the 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 Common Stock, whether any such swap or transaction described in clause (i) or (ii) above is to be settled by delivery of Common Stock or such other securities, in cash or otherwise. The foregoing sentence shall not apply to (A) the Securities to be sold hereunder, (B) any shares of Common Stock issued by the Company upon the exercise of an option or warrant or the conversion of a security outstanding on the date hereof and referred to in the Prospectus, (C) any shares of Common Stock issued or options to purchase Common Stock granted pursuant to existing employee benefit plans of the Company referred to in the Prospectus (D) any shares of Common Stock issued or options to purchase Common Stock granted pursuant to any non-employee director stock plan or dividend reinvestment plan (E) any shares of Common Stock issued or sold in connection with any joint venture, partnering or other arrangement with any strategic investor or partner of the Company, (F) any shares of Common Stock issued or sold in connection with any acquisition made by the Company, or (G) any note issued to Medicis Pharmaceutical Corporation or any of its affiliates pursuant to the Settlement Agreement and Mutual Release dated January 12, 2005, by and among BioMarin Pharmaceutical Inc., BioMarin Pediatrics Inc., Medicis Pharmaceutical Corporation and Medicis Pediatrics, Inc. (f/k/a Ascent Pediatrics, Inc.) or any securities issuable upon conversion of the principal amount of or interest under any such note.

(k) Reporting Requirements. The Company, during the period when the Prospectus is required to be delivered under the Act, will file all documents required to be filed with the Commission pursuant to the Exchange Act within the time periods required by the Exchange Act and the rules and regulations of the Commission thereunder.

(l) Listing. The Company will use its commercially reasonable efforts to effect and maintain the quotation of the Securities on the Nasdaq National Market.

(m) Controls and Procedures. For a period of one year from the date of this Agreement, the Company and its subsidiaries will maintain such controls and other procedures, including without limitation those required by Sections 302 and 906 of the Xxxxxxxx-Xxxxx Act and the applicable regulations thereunder, that are designed to ensure that information required to be disclosed by the Company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Commission’s rules and forms, including without limitation, controls and procedures designed to ensure that information required to be disclosed by the Company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the Company’s management, including its principal executive officer and its principal financial officer, or persons performing similar functions, as appropriate to allow timely decisions regarding required

disclosure, to ensure that material information relating to Company, including its subsidiaries, is made known to them by others within those entities.

(n) Xxxxxxxx-Xxxxx Act. For a period of one year from the date of this Agreement, the Company and its subsidiaries will comply with all effective applicable provisions of the Xxxxxxxx-Xxxxx Act.

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 of each amendment thereto, (ii) the preparation, printing and delivery to the Underwriter of this Agreement and such other documents as may reasonably be required in connection with the offering, purchase, sale, issuance or delivery of the Securities, (iii) the preparation, issuance and delivery of the certificates for the Securities to the Underwriter, including any stock or other transfer taxes and any stamp or other duties payable upon the sale, issuance or delivery of the Securities to the Underwriter, (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(f) hereof, including filing fees and the reasonable fees and disbursements of counsel for the Underwriter in connection therewith and in connection with the preparation of the Blue Sky Survey and any supplement thereto, (vi) the printing and delivery to the Underwriter of copies of the Prospectus and any amendments or supplements thereto, (vii) the preparation, printing and delivery to the Underwriter of copies of the Blue Sky Survey and any supplement thereto, (viii) the 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 “road show” 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 in connection with the road show presentations, lodging expenses of the representatives and officers of the Company and any such consultants (provided that the Underwriter shall be responsible for the Underwriter’s lodging expenses), and one-half of the cost of any aircraft chartered with the Company’s consent, or other means of transportation used, in connection with the road show (with the other one-half of such cost being paid by the Underwriter), (x) the filing fees incident to, and the reasonable fees and disbursements of counsel to the Underwriter in connection with, the review by the National Association of Securities Dealers, Inc. (the “NASD”) of the terms of the sale of the Securities and (xi) the fees and expenses incurred in connection with the inclusion of the Securities in the Nasdaq National Market.

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

SECTION 5. Conditions of Underwriter’s Obligations. The obligations of the Underwriter 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 or any subsidiary of the Company pursuant to the provisions hereof, to the performance by the Company of its covenants and other obligations hereunder, and to the following further conditions:

(a) Effectiveness of Registration Statement. The Registration Statement, including any Rule 462(b) Registration Statement, has become effective and at the Closing Time no stop order suspending the effectiveness of the Registration Statement shall have been issued under the Act or

proceedings therefor initiated or threatened by the Commission, and any request on the part of the Commission for additional information shall have been complied with to the reasonable satisfaction of counsel to the Underwriter. A prospectus containing the Rule 430A Information shall have been filed with the Commission in accordance with Rule 424(b) (or a post-effective amendment providing such information shall have been filed and declared effective in accordance with the requirements of Rule 430A).

(b) Opinion of Counsel for Company. At the Closing Time, the Underwriter shall have received the favorable opinion, dated as of the Closing Time, of Paul, Hastings, Xxxxxxxx & Xxxxxx LLP, counsel for the Company, in form and substance satisfactory to counsel for the Underwriter, to the effect set forth in Exhibit A hereto.

(c) Opinion of Special Regulatory Counsel for Company. At the Closing Time, the Underwriter shall have received the favorable opinion, dated as of the Closing Time, of Xxxxx, Xxxxxx & XxXxxxxx, P.C., special regulatory counsel for the Company, in form and substance satisfactory to counsel for the Underwriter, to the effect set forth in Exhibit B hereto.

(d) Opinion of Special Patent Counsel for Company. At the Closing Time, the Underwriter shall have received the favorable opinion, dated as of the Closing Time, of Xxxxxxxx, Gerstein & Borun, LLP, special patent counsel for the Company, in form and substance satisfactory to counsel for the Underwriter, to the effect set forth in Exhibit C hereto.

(e) Opinion of Counsel for Underwriter. At the Closing Time, the Underwriter shall have received the favorable opinion, dated as of the Closing Time, of Xxxxxx & Xxxxxxx LLP, counsel for the Underwriter, in form and substance satisfactory to the Underwriter. In giving such opinion such counsel may rely, as to all matters governed by the laws of jurisdictions other than the law of the State of New York and the federal law of the United States, upon the opinions of counsel satisfactory to the Underwriter. Such counsel may also state that, insofar as such opinion involves factual matters, they have relied, to the extent they deem proper, upon certificates of officers of the Company and its subsidiaries and certificates of public officials.

(f) Accountant’s Comfort Letter. On the date of this Agreement, the Underwriter shall have received from KPMG LLP a letter dated such date, in form and substance satisfactory to the Underwriter, containing statements and information of the type ordinarily included in accountants’ “comfort letters” with respect to the financial statements and certain financial information contained in or incorporated by reference into the Registration Statement and the Prospectus.

(g) Bring-down Comfort Letter. At the Closing Time, the Underwriter shall have received from KPMG 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) 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, 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 taken as a whole, whether or not arising in the ordinary course of business, and the Underwriter shall have received a certificate of the President or a Vice President of the Company and of the chief financial 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 (with the exception of the representations and

warranties in Section 1(a)(vii)(A)-(D), which shall be true and correct as of such date), (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.

(i) NASD Matters. The NASD shall, if applicable, have confirmed that it has not raised any objection with respect to the fairness and reasonableness of the underwriting terms and arrangements.

(j) Additional Information. At or prior to the Closing Time, the Underwriter and counsel to the Underwriter shall have been furnished with such information, certificates and documents as they may reasonably require for the purpose of enabling them to pass upon the issuance and sale of the Securities as contemplated herein and related proceedings, or to evidence the accuracy of any of the representations or warranties, or the fulfillment of any of the conditions, herein contained, or otherwise in connection with the Offering contemplated hereby; and all opinions and certificates mentioned above or elsewhere in this Agreement shall be reasonably satisfactory in form and substance to the Underwriter and counsel for the Underwriter.

All such opinions, certificates, letters and other documents will be in compliance with the provisions hereof only if they are satisfactory in form and substance to the Underwriter and counsel for the Underwriter. The Company will furnish the Underwriter with such conformed copies of such opinions, certificates, letters and other documents as they shall reasonably request.

(k) Termination of Agreement. If any condition specified in this Section shall not have been fulfilled when and as required to be fulfilled, this Agreement may be terminated by the Underwriter by written notice to the Company at any time at or prior to the Closing Time, 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 and 8 shall survive any such termination and remain in full force and effect.

SECTION 6. Indemnification.

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

(i) against any and all loss, liability, claim, damage and expense whatsoever, as incurred, arising out of any untrue statement or alleged untrue statement of a material fact contained in the Registration Statement (or any amendment thereto), including the Rule 430A Information or the omission or alleged omission therefrom of a material fact required to be stated therein or necessary to make the statements therein not misleading or arising out of any untrue statement or alleged untrue statement of a material fact included in the Prospectus (or any amendment or supplement thereto), or the omission or alleged omission therefrom 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; and

(iii) against any and all expense whatsoever, as incurred (including the fees and disbursements of counsel chosen by Xxxxxxx Xxxxx), reasonably incurred 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 the Underwriter expressly for use in the Registration Statement (or any amendment thereto) or the Prospectus.

(b) Indemnification of Company, Directors and Officers. The Underwriter 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 Act or Section 20 of the Exchange Act, against any and all loss, liability, claim, damage and expense described in the indemnity contained in subsection (a) of this Section, as incurred, but only with respect to untrue statements or omissions, or alleged untrue statements or omissions, made in the Registration Statement (or any amendment thereto) or the Prospectus (or any amendment or supplement thereto) in reliance upon and in conformity with written information furnished to the Company by the Underwriter expressly for use in the Registration Statement (or any amendment thereto) or the Prospectus (or any amendment or supplement thereto).

(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, the Company shall be entitled to assume the defense of any action or proceeding with counsel reasonably satisfactory to the indemnified party. Upon assumption by the Company of the defense of any such action or proceeding, the indemnified party shall have the right to participate in such action or proceeding and to retain its own counsel but the Company shall not be liable for any legal expenses of such counsel retained by such indemnified party in connection with the defense thereof unless (i) the Company has agreed to pay such fees and expenses, (ii) the Company shall have failed to employ counsel reasonably satisfactory to the indemnified party in a timely manner, or (iii) the indemnified party shall have been advised by counsel that there are actual or potential conflicting interests between the Company and the indemnified party, including situations in which there are one or more legal defenses available to the indemnified party that are different from or additional to those available to the Company; provided, however, that the Company shall not, in connection with any one such action or proceeding or separate but substantially similar actions or proceedings in the same jurisdiction arising out of the same general allegations, be liable for the fees and expenses of more than one separate firm of attorneys at any time for all indemnified parties, including Xxxxxxx Xxxxx. The Company will not settle, compromise or consent to the entry of any judgment in any pending or threatened claim, action or proceeding in respect of which indemnification could be sought under this Section 6 or 7 (whether or not Xxxxxxx Xxxxx or any other indemnified party is an actual or potential party to such claim, action or

proceeding), unless such settlement, compromise or consent includes an unconditional release of each indemnified party from all liability arising out of such claim, action or proceeding. The Company shall not have any liability with respect to any settlement, compromise or consent to the entry of any judgment in any pending or threatened claim, action or proceeding entered into or made by Xxxxxxx Xxxxx or any other indemnified party in respect of which indemnification or contribution could be sought under this Section 6 or 7 (whether or not Xxxxxxx Xxxxx or any other indemnified party is an actual or potential party to such claim, action or proceeding), without the prior written consent of the Company.

If Xxxxxxx Xxxxx or any other indemnified party is requested or required to appear as a witness in any action brought by or on behalf of or against the Company in which such party is not named as a defendant, the Company will reimburse Xxxxxxx Xxxxx for all expenses incurred in connection with such party’s appearing and preparing to appear as such a witness, including, without limitation, the reasonable fees and disbursements of its legal counsel.

(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 Underwriter, 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 Underwriter 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 Underwriter 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 (x) the total proceeds from the offering of the Securities pursuant to this Agreement (before deducting expenses) received by the Company and (y) the total underwriting discount received by the Underwriter, in each case as set forth on the cover of the Final Prospectus Supplement, hereof bear to the sum of (x) and (y).

The relative fault of the Company on the one hand and the Underwriter 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 Underwriter and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission.

The Company and the Underwriter agree that it would not be just and equitable if contribution pursuant to this Section 7 were determined by pro rata allocation 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, the Underwriter shall not be required to contribute any amount in excess of the total underwriting discount received by the Underwriter.

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

For purposes of this Section 7, each person, if any, who controls the Underwriter within the meaning of Section 15 of the Act or Section 20 of the Exchange Act and the Underwriter’s Affiliates and selling agents shall have the same rights to contribution as the 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 Act or Section 20 of the Exchange Act shall have the same rights to contribution as the Company.

SECTION 8. Representations and Agreements to Survive Delivery. 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 the Underwriter or its Affiliates or selling agents, and any person controlling the Underwriter, its officers or directors, any person controlling the Company, and (ii) delivery of and payment for the Securities.

SECTION 9. Termination of Agreement.

(a) Termination; General. The Underwriter 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 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 taken as a whole, 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 Underwriter, impracticable or inadvisable to market the Securities or to enforce contracts for the sale of the Securities, or (iii) if trading in any securities of the Company has been suspended or materially limited by the Commission or the Nasdaq National Market, or if trading generally on the New York Stock Exchange or in the Nasdaq National 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, the National Association of Securities Dealers, Inc. or any other governmental authority, or (iv) a material disruption has occurred in commercial banking or securities settlement or clearance services in the United States or (v) if a banking moratorium has been declared by either Federal or New York authorities. Notice of any termination of this Agreement shall be promptly given to the Company by telecopy or telephone and shall be subsequently confirmed by letter.

(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 and 8 shall survive such termination and remain in full force and effect.

SECTION 10. Default.

(a) If the Company shall fail at the Closing Time to sell the number of Securities that it is obligated to sell hereunder, then this Agreement shall terminate without any liability on the part of any nondefaulting party; provided, however, that the provisions of Sections 1, 4, 6, 7 and 8 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.

(b) Assuming that all conditions to the Underwriter’s obligation to purchase the Securities have been satisfied, if the Underwriter shall fail at the Closing Time to purchase the Securities which it is obligated to purchase under this Agreement, then this Agreement shall terminate without any liability on the part of any nondefaulting party; provided, however, that the provisions of Sections 4, 6 and 7 shall remain in full force and effect. No action taken pursuant to this section shall relieve the Underwriter from liability, if any, in respect of such default.

SECTION 11. Notices. All notices and other communications hereunder shall be in writing and shall be deemed to have been duly given if mailed or transmitted by any standard form of telecommunication. Notices to the Underwriter shall be directed to Xxxxxxx Lynch, Pierce, Xxxxxx & Xxxxx Incorporated at 0 Xxxxx Xxxxxxxxx Xxxxxx, Xxx Xxxx, Xxx Xxxx 00000, attention of Xxxxx Xxxxxxx; notices to the Company shall be directed to it at 000 Xxxxxxx Xxxxx, Xxxxxx, XX 00000, attention of Corporate Counsel.

SECTION 12. Parties. This Agreement shall inure to the benefit of and be binding upon the Underwriter 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 Underwriter, 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 Underwriter 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.

SECTION 13. GOVERNING LAW. THIS AGREEMENT (INCLUDING ANY CLAIM OR CONTROVERSY ARISING OUT OF OR RELATING TO THIS AGREEMENT) SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT GIVING EFFECT TO CONFLICT OF LAWS PRINCIPLES THAT WOULD RESULT IN THE APPLICATION OF ANY LAW OTHER THAN THE LAW OF THE STATE OF NEW YORK.

SECTION 14. 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 15. Counterparts. This Agreement may be executed (including by facsimile) 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 16. Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction hereof.

[Signature Page Follows]

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


Very truly,

BioMarin Pharmaceutical Inc.

By:		/s/ Xxxx-Xxxxxxx Xxxxxxxx
Name:		Xxxx-Xxxxxxx Xxxxxxxx
Title:		Chief Executive Officer


Confirmed as of the date first above mentioned.

XXXXXXX XXXXX & CO.
XXXXXXX LYNCH, PIERCE, XXXXXX & XXXXX INCORPORATED

By:		/s/ Xxxxx Xxxxxxx
Name:		Xxxxx Xxxxxxx
Title:		Vice President

SCHEDULE A


Name of Underwriter		Number of Securities
Xxxxxxx Lynch, Pierce, Xxxxxx & Xxxxx Incorporated		8,500,000





Total		8,500,000

SCHEDULE B

___________

8,500,000 Shares of Common Stock

(Par Value $0.001 Per Share)

1. The initial public offering price per share for the Securities, determined as provided in said Section 2, shall be $7.05.

2. The purchase price per share for the Securities to be paid by the Underwriter shall be $6.6975, being an amount equal to the initial public offering price set forth above less $0.3525 per share.

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BIOMARIN PHARMACEUTICAL INC. (a Delaware Corporation) 8,500,000 Shares of Common Stock (Par Value $0.001 Per Share) PURCHASE AGREEMENT

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