10,000,000 Shares

EX-1.1 3 dex11.htm FORM OF UNDERWRITING AGREEMENT Form of Underwriting Agreement

EXHIBIT 1.1

10,000,000 Shares

SIRF TECHNOLOGY HOLDINGS, INC.

COMMON STOCK, $0.0001 PAR VALUE

UNDERWRITING AGREEMENT

, 2004

Morgan Stanley & Co. Incorporated

Credit Suisse First Boston LLC

Deutsche Bank Securities Inc.

Thomas Weisel Partners LLC

c/o Morgan Stanley & Co. Incorporated

1585 Broadway

New York, New York 10036

Dear Sirs and Mesdames:

SiRF Technology Holdings, Inc., a Delaware corporation (the “Company”), proposes to issue and sell to the several Underwriters named in Schedule II hereto (the “Underwriters”), and certain Stockholders of the Company (the “Selling Stockholders”) named in Schedule I hereto severally propose to sell to the several Underwriters, an aggregate of 10,000,000 shares of the Common Stock, $0.0001 par value of the Company (the “Firm Shares”), of which 7,000,000 shares are to be issued and sold by the Company and 3,000,000 shares are to be sold by the Selling Stockholders, each Selling Stockholder selling the amount set forth opposite such Selling Stockholder’s name in Schedule I hereto.

The Company also proposes to issue and sell to the several Underwriters not more than an additional 1,500,000 shares of its Common Stock, $0.0001 par value (the “Additional Shares”) if and to the extent that you, as Managers of the offering, shall have determined to exercise, on behalf of the Underwriters, the right to purchase such shares of common stock granted to the Underwriters in Section 3 hereof. The Firm Shares and the Additional Shares are hereinafter collectively referred to as the “Shares.” The shares of Common Stock, $0.0001 par value of the Company to be outstanding after giving effect to the sales contemplated hereby are hereinafter referred to as the “Common Stock.” The Company and the Selling Stockholders are hereinafter sometimes collectively referred to as the “Sellers.”

The Company has filed with the Securities and Exchange Commission (the “Commission”) a registration statement, including a prospectus, relating to the Shares. The registration statement as amended at the time it becomes effective, including the information (if any) deemed to be part of the registration statement at the time of effectiveness pursuant to Rule 430A under the Securities Act of 1933, as amended (the “Securities Act”), is hereinafter referred to as the “Registration Statement”; the prospectus in the form first used to confirm sales of Shares is hereinafter referred to as the “Prospectus.” If the Company has filed an abbreviated registration statement to register additional shares of Common Stock pursuant to Rule 462(b) under the Securities Act (the “Rule 462 Registration Statement”), then any reference herein to the term “Registration Statement” shall be deemed to include such Rule 462 Registration Statement.

Morgan Stanley & Co. Incorporated (“Morgan Stanley”) has agreed to reserve a portion of the Shares to be purchased by it under this Agreement for sale to the Company’s directors, officers, employees, customers, business associates and other parties related to the Company (collectively, “Participants”), as set forth in the Prospectus under the heading “Underwriters” (the “Directed Share Program”). The Shares to be sold by Morgan Stanley and its affiliates pursuant to the Directed Share Program are referred to hereinafter as the “Directed Shares.” Any Directed Shares not confirmed for purchase by any Participants by the end of the business day on which this Agreement is executed will be offered to the public by the Underwriters as set forth in the Prospectus.

1. Representations and Warranties of the Company. The Company represents and warrants to and agrees with each of the Underwriters that:

(a) The Registration Statement has become effective; no stop order suspending the effectiveness of the Registration Statement is in effect, and no proceedings for such purpose are pending before or threatened by the Commission.

(b) (i) The Registration Statement, when it became effective, did not contain and, as amended or supplemented, if applicable, will not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading, (ii) the Registration Statement and the Prospectus comply and, as amended or supplemented, if applicable, will comply in all material respects with the Securities Act and the applicable rules and regulations of the Commission thereunder and (iii) the Prospectus does not contain and, as amended or supplemented, if applicable, will not contain any untrue statement of a material fact or omit to state a material fact

necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading, except that the representations and warranties set forth in this paragraph do not apply to statements or omissions in the Registration Statement or the Prospectus based upon information relating to any Underwriter furnished to the Company in writing by such Underwriter through you expressly for use therein.

(c) The Company has been duly incorporated, is validly existing as a corporation in good standing under the laws of the jurisdiction of its incorporation, has the corporate power and authority to own its property and to conduct its business as described in the Prospectus and is duly qualified to transact business and is in good standing in each jurisdiction in which the conduct of its business or its ownership or leasing of property requires such qualification, except to the extent that the failure to be so qualified or be in good standing would not have a material adverse effect on the Company and its subsidiaries, taken as a whole.

(d) Each subsidiary of the Company has been duly incorporated, is validly existing as a corporation in good standing under the laws of the jurisdiction of its incorporation, has the corporate power and authority to own its property and to conduct its business as described in the Prospectus and is duly qualified to transact business and is in good standing in each jurisdiction in which the conduct of its business or its ownership or leasing of property requires such qualification, except to the extent that the failure to be so qualified or be in good standing would not have a material adverse effect on the Company and its subsidiaries, taken as a whole; all of the issued shares of capital stock of each subsidiary of the Company have been duly and validly authorized and issued, are fully paid and non-assessable and are owned directly by the Company, free and clear of all liens, encumbrances, equities or claims. Other than SiRF Technology, Inc. and Enuvis, Inc., the Company has no subsidiaries.

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

(f) The authorized capital stock of the Company conforms as to legal matters to the description thereof contained in the Prospectus.

(g) The shares of Common Stock (including the Shares to be sold by the Selling Stockholders) outstanding prior to the issuance of the Shares to be sold by the Company have been duly authorized and are validly issued, fully paid and non-assessable.

(h) The Shares to be sold by the Company have been duly authorized and, when issued and delivered in accordance with the terms of this Agreement, will be validly issued, fully paid and non-assessable, and the issuance of such Shares will not be subject to any preemptive or similar rights.

(i) The execution and delivery by the Company of, and the performance by the Company of its obligations under, this Agreement will not contravene any provision of applicable law or the certificate of incorporation or by-laws of the Company or any agreement or other instrument binding upon the Company or any of its subsidiaries that is material to the Company and its subsidiaries, taken as a whole, or any judgment, order or decree of any governmental body, agency or court having jurisdiction over the Company or any subsidiary, and no consent, approval, authorization or order of, or qualification with, any governmental body or agency is required for the performance by the Company of its obligations under this Agreement, except such as may be required by the securities or Blue Sky laws of the various states in connection with the offer and sale of the Shares.

(j) There has not occurred any material adverse change, or any development involving a prospective material adverse change, in the condition, financial or otherwise, or in the earnings, business or operations of the Company and its subsidiaries, taken as a whole, from that set forth in the Prospectus (exclusive of any amendments or supplements thereto subsequent to the date of this Agreement).

(k) There are no legal or governmental proceedings pending or threatened to which the Company or any of its subsidiaries is a party or to which any of the properties of the Company or any of its subsidiaries is subject that are required to be described in the Registration Statement or the Prospectus and are not so described or any statutes, regulations, contracts or other documents that are required to be described in the Registration Statement or the Prospectus or to be filed as exhibits to the Registration Statement that are not described or filed as required.

(l) Each preliminary prospectus filed as part of the registration statement as originally filed or as part of any amendment thereto, or filed pursuant to Rule 424 under the Securities Act, complied when so filed in all material respects with the Securities Act and the applicable rules and regulations of the Commission thereunder.

(m) The Company is not, and after giving effect to the offering and sale of the Shares and the application of the proceeds thereof as

described in the Prospectus will not be, required to register as an “investment company” as such term is defined in the Investment Company Act of 1940, as amended.

(n) The Company and its subsidiaries (i) are in compliance with any and all applicable foreign, federal, state and local laws and regulations relating to the protection of human health and safety, the environment or hazardous or toxic substances or wastes, pollutants or contaminants (“Environmental Laws”), (ii) have received all permits, licenses or other approvals required of them under applicable Environmental Laws to conduct their respective businesses and (iii) are in compliance with all terms and conditions of any such permit, license or approval, except where such noncompliance with Environmental Laws, failure to receive required permits, licenses or other approvals or failure to comply with the terms and conditions of such permits, licenses or approvals would not, singly or in the aggregate, have a material adverse effect on the Company and its subsidiaries, taken as a whole.

(o) There are no costs or liabilities associated with Environmental Laws (including, without limitation, any capital or operating expenditures required for clean-up, closure of properties or compliance with Environmental Laws or any permit, license or approval, any related constraints on operating activities and any potential liabilities to third parties) which would, singly or in the aggregate, have a material adverse effect on the Company and its subsidiaries, taken as a whole.

(p) There are no contracts, agreements or understandings between the Company and any person granting such person the right to require the Company to file a registration statement under the Securities Act with respect to any securities of the Company or to require the Company to include such securities with the Shares registered pursuant to the Registration Statement.

(q) Subsequent to the respective dates as of which information is given in the Registration Statement and the Prospectus, (1) the Company and its subsidiaries have not incurred any material liability or obligation, direct or contingent, nor entered into any material transaction not in the ordinary course of business; (2) the Company has not purchased any of its outstanding capital stock, nor declared, paid or otherwise made any dividend or distribution of any kind on its capital stock other than ordinary and customary dividends; and (3) there has not been any material change in the capital stock, short-term debt or long-term debt of the Company and its subsidiaries, except in each case as described in the Prospectus.

(r) The Company and its subsidiaries have good and marketable title in fee simple to all real property and good and marketable title to all personal property owned by them which is material to the business of the Company and its subsidiaries, in each case free and clear of all liens, encumbrances and defects except such as are described in the Prospectus or such as do not materially 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 and its subsidiaries; and any real property and buildings held under lease by the Company and its subsidiaries are held by them under valid, subsisting and enforceable leases with such exceptions as are not material and do not interfere with the use made and proposed to be made of such property and buildings by the Company and its subsidiaries, in each case except as described in the Prospectus.

(s) The Company and its subsidiaries own or possess, or can acquire on reasonable terms, all material patents, patent rights, licenses, inventions, copyrights, know-how (including trade secrets and other unpatented and/or unpatentable proprietary or confidential information, systems or procedures), trademarks, service marks and trade names currently employed by them in connection with the business now operated by them, and neither the Company nor any of its subsidiaries has received any notice of infringement of or conflict with asserted rights of others with respect to any of the foregoing which, singly or in the aggregate, if the subject of an unfavorable decision, ruling or finding, would have a material adverse affect on the Company and its subsidiaries, taken as a whole.

(t) No material labor dispute with the employees of the Company or any of its subsidiaries exists, except as described in the Prospectus, or, to the knowledge of the Company, is imminent; and the Company is not aware of any existing, threatened or imminent labor disturbance by the employees of any of its principal suppliers, manufacturers or contractors that could have a material adverse effect on the Company and its subsidiaries, taken as a whole.

(u) The Company and its subsidiaries are insured by the insurers of recognized financial responsibility against such losses and risks and in such amounts as are prudent and customary in the businesses in which they are engaged; neither the Company nor any of its subsidiaries has been refused any insurance coverage sought or applied for; and neither the Company nor any of its subsidiaries has any reason to believe that it will not be able to renew its existing insurance coverage as and when such coverage expires or to obtain similar coverage from similar insurers as may be necessary to continue its business at a cost that would not have a

material adverse effect on the Company and its subsidiaries, taken as a whole, except as described in the Prospectus.

(v) The Company and its subsidiaries possess all certificates, authorizations and permits issued by the appropriate federal, state or foreign regulatory authorities necessary to conduct their respective businesses, and neither the Company nor any of its subsidiaries has received any notice of proceedings relating to the revocation or modification of any such certificate, authorization or permit which, singly or in the aggregate, if the subject of an unfavorable decision, ruling or finding, would have a material adverse effect on the Company and its subsidiaries, taken as a whole, except as described in the Prospectus.

(w) The Company and its subsidiaries have complied and are in compliance with all federal, state, local and foreign statutes, executive orders, proclamations, regulations, rules, directives, decrees, ordinances and similar provisions having the force or effect of law and all judicial and administrative orders, rulings, determinations and common law concerning the importation of merchandise, the export or re-export of products, services and technology, and the terms and conduct of international transactions applicable to the Company and its subsidiaries in connection with the conduct of the Company’s or any subsidiary’s business (including as the same relates to record keeping requirements) (“International Trade Laws and Regulations”), where noncompliance could have a material adverse effect on the Company and its subsidiaries, taken as a whole; neither the Company nor any of its subsidiaries has made or provided any material false statement or material omission to any agency of any federal, state or local government, purchasers of products, or foreign government or foreign agency, in connection with the exportation of merchandise (including with respect to export licenses, exceptions and other export authorizations and any filings required for or related to exportation of any item), the importation of merchandise or other approvals required by a foreign government or agency or any other requirement relating to any International Trade Laws and Regulations that could have a material adverse effect on the Company and its subsidiaries, taken as a whole; neither the Company nor any of its subsidiaries has made any payment, offer, gift, promise to give, or authorized or otherwise participated in, assisted or facilitated any payment or gift relating to the Company’s or any subsidiary’s business that is prohibited by the United States Foreign Corrupt Practices Act that could have a material adverse effect on the Company and its subsidiaries, taken as a whole.

(x) The Company and each of its subsidiaries maintain a system of internal accounting controls sufficient to provide reasonable assurance that

(1) transactions are executed in accordance with management’s general or specific authorizations; (2) transactions are recorded as necessary to permit preparation of financial statements in conformity with generally accepted accounting principles and to maintain asset accountability; (3) access to assets is permitted only in accordance with management’s general or specific authorization; and (4) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences.

(y) The financial statements of the Company filed with the Commission as a part of the Registration Statement and included in the Prospectus present fairly the consolidated financial position of the Company, as of and at the dates indicated and the results of its operations and cash flows for the periods specified. Such financial statements have been prepared in conformity with generally accepted accounting principles as applied in the United States applied on a consistent basis throughout the periods involved, except as may be expressly stated in the related notes thereto. No other financial statements or schedules of the Company or any other entity are required to be included in the Registration Statement pursuant to any requirement of the Act or any rules and regulations thereunder, including Rule 3-05 of Regulation S-X.

(z) Ernst & Young, LLP are independent public accountants with respect to the Company and its subsidiaries as required by the Securities Act.

(aa) As of the date the Registration Statement became effective, the Common Stock was authorized for listing on the Nasdaq National Market upon official notice of issuance.

(bb) Except for the Shares, substantially all of the outstanding shares of Common Stock, and substantially all securities convertible into or exercisable or exchangeable for Common Stock, are subject to valid, binding and enforceable agreements (collectively, the “Lock-up Agreements”), either in substantially the form attached as Exhibit A or, with respect to the Selling Stockholders, Exhibit B, that restrict the holders thereof from selling, making any short sale of, granting any option for the purchase of, or otherwise transferring or disposing of, any of such shares of Common Stock, or any such securities convertible into or exercisable or exchangeable for Common Stock, for a period of 180 days (240 days in the case of the Selling Stockholders) after the date of the Prospectus without the prior written consent of Morgan Stanley or the Company.

(cc) The Company (i) has notified each holder of a currently outstanding stock option issued under its incentive stock plans (the “Option Plans”), as well as each holder of a non-plan stock option, and each person who has acquired shares of Common Stock pursuant to the exercise of any option granted under the Option Plans or any non-plan stock option, that pursuant to the terms of the Option Plans or non-plan stock option, no such options or shares may be sold or otherwise transferred or disposed of for a period of 180 days after the date of the Prospectus and (ii) has imposed a stop-transfer instruction with the Company’s transfer agent in order to enforce the foregoing lock-up provision imposed pursuant to the Option Plans or non-plan stock option.

(dd) The Company (i) has notified certain stockholders who are parties to the Amended and Restated Investors’ Rights Agreement dated February 14, 2003 by and among the Company and certain investors in the Company’s capital stock (the “Registration Rights Agreement”), that pursuant to the terms of the Registration Rights Agreement, none of the shares of the Company’s capital stock held by such stockholders may be sold or otherwise transferred or disposed of for a period of 180 days after the date of the Prospectus and (ii) has imposed a stop-transfer instruction with the Company’s transfer agent in order to enforce the 180 day lock-up provision imposed pursuant to the Registration Rights Agreement with respect to each stockholder subject to the Registration Rights Agreement.

(ee) The Registration Statement, the Prospectus and any preliminary prospectus comply, and any amendments or supplements thereto will comply, with any applicable laws or regulations of foreign jurisdictions in which the Prospectus or any preliminary prospectus, as amended or supplemented, if applicable, are distributed in connection with the Directed Share Program.

(ff) No authorization, approval, consent, license, order, registration or qualification of or with any government, governmental body or agency, other than such as have been obtained, is necessary under the securities laws and regulations of any jurisdiction in which the Directed Shares are being offered.

(gg) The Company has not offered, or caused Morgan Stanley or its affiliates to offer, Shares to any person pursuant to the Directed Share Program with the specific intent to unlawfully influence (i) a customer or supplier of the Company to alter the customer’s or supplier’s level or type of

business with the Company, or (ii) a trade journalist or publication to write or publish favorable information about the Company or its products.

(hh) The Company has established and maintains disclosure controls and procedures (as such term is defined in Rule 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)); such disclosure controls and procedures are designed to ensure that material information relating to the Company, including its subsidiaries, is made known to the Company’s chief executive officer and its chief financial officer by others within those entities, and such disclosure controls and procedures are effective to perform the functions for which they were established; the Company’s auditors and the Audit Committee of the Board of Directors have been advised of: (i) any significant deficiencies in the design or operation of internal controls which could adversely affect the Company’s ability to record, process, summarize, and report financial data; and (ii) any fraud, whether or not material, that involves management or other employees who have a role in the Company’s internal controls; any material weaknesses in internal controls have been identified for the Company’s auditors; since the date of the most recent evaluation of such disclosure controls and procedures, there have been no significant changes in internal controls or in other factors that could significantly affect internal controls, including any corrective actions with regard to significant deficiencies and material weaknesses; the principal executive officers (or their equivalents) and principal financial officers (or their equivalents) of the Company have made all certifications required by the Sarbanes-Oxley Act of 2002 (the “Sarbanes-Oxley Act”) and any related rules and regulations promulgated by the Commission, and the statements contained in any such certification are complete and correct; and the Company is otherwise in compliance with all applicable provisions of the Sarbanes-Oxley Act that are effective.

2. Representations and Warranties of the Selling Stockholders. Each Selling Stockholder represents and warrants to and agrees with each of the Underwriters that:

(a) This Agreement has been duly authorized, executed and delivered by or on behalf of such Selling Stockholder.

(b) The execution and delivery by such Selling Stockholder of, and the performance by such Selling Stockholder of its obligations under, this Agreement, the Letter of Transmittal, Custody Agreement and Irrevocable Election to Sell signed by such Selling Stockholder and The Bank of New York, as Custodian, relating to the deposit of the Shares to be sold by such Selling Stockholder (the “Custody Agreement”) and the Power of Attorney appointing certain individuals as such Selling

Stockholder’s attorneys-in-fact to the extent set forth therein, relating to the transactions contemplated hereby and by the Registration Statement (the “Power of Attorney”) will not contravene any provision of applicable law, or the certificate of incorporation or by-laws of such Selling Stockholder (if such Selling Stockholder is a corporation), or any agreement or other instrument binding upon such Selling Stockholder or any judgment, order or decree of any governmental body, agency or court having jurisdiction over such Selling Stockholder, and no consent, approval, authorization or order of, or qualification with, any governmental body or agency is required for the performance by such Selling Stockholder of its obligations under this Agreement or the Custody Agreement or Power of Attorney of such Selling Stockholder, except such as may be required by the securities or Blue Sky laws of the various states in connection with the offer and sale of the Shares.

(c) Such Selling Stockholder has, and on the Closing Date will have, valid title to, or a valid “security entitlement” within the meaning of Section 8-501 of the New York Uniform Commercial Code in respect of, the Shares to be sold by such Selling Stockholder free and clear of all security interests, claims, liens, equities or other encumbrances and the legal right and power, and all authorization and approval required by law, to enter into this Agreement, the Custody Agreement and the Power of Attorney and to sell, transfer and deliver the Shares to be sold by such Selling Stockholder or a security entitlement in respect of such Shares.

(d) The Custody Agreement and the Power of Attorney have been duly authorized, executed and delivered by such Selling Stockholder and are valid and binding agreements of such Selling Stockholder.

(e) Certificates in negotiable form for the Shares to be sold by such Selling Stockholder have been placed in custody under a Custody Agreement for delivery under this Agreement with the Custodian; such Selling Stockholder specifically agrees that the Shares represented by the certificates so held in custody for such Selling Stockholder are subject to the interests of the several Underwriters and the Company, that the arrangements made by such Selling Stockholder shall not be terminated by any act of such Selling Stockholder or by operation of law, whether by the death or incapacity of such Selling Stockholder (or, in the case of a Selling Stockholder who is not an individual, the dissolution or liquidation of such Selling Stockholder) or the occurrence of any other event prior to August 1, 2004 if such death, incapacity, dissolution, liquidation or other such event should occur before the delivery of such Shares hereunder, certificates for such Shares shall be delivered by the Custodian in accordance with the terms and conditions of this Agreement as if such

death, incapacity, dissolution, liquidation or other event had not occurred, regardless of whether the Custodian shall have received notice of such death, incapacity, dissolution, liquidation or other event.

(f) Delivery of the Shares to be sold by such Selling Stockholder and payment therefor pursuant to this Agreement will pass valid title to such Shares, free and clear of any adverse claim within the meaning of Section 8-102 of the New York Uniform Commercial Code, to each Underwriter who has purchased such Shares without notice of an adverse claim.

(g) Such Selling Stockholder has no reason to believe that the representations and warranties of the Company contained in Section 1 are not true and correct, is familiar with the Registration Statement and Prospectus and has no knowledge of any material fact, condition or information not disclosed in the Prospectus that has had, or may have, a material adverse effect on the Company and its subsidiaries, taken as a whole. Such Selling Stockholder is not prompted by any information concerning the Company or its subsidiaries which is not set forth in the Prospectus to sell its Shares pursuant to this Agreement.

(h) (i) The Registration Statement, when it became effective, did not contain and, as amended or supplemented, if applicable, will not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading, but, with respect to each Selling Stockholder that is not an “Insider” (as defined below), only with reference to information relating to such Selling Stockholder furnished in writing by or on behalf of such Selling Stockholder expressly for use in the Registration Statement, (ii) the Registration Statement and the Prospectus comply and, as amended or supplemented, if applicable, will comply in all material respects with the Securities Act and the applicable rules and regulations of the Commission thereunder and (iii) the Prospectus does not contain and, as amended or supplemented, if applicable, will not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading, but, with respect to each Selling Stockholder that is not an “Insider,” only with reference to information relating to such Selling Stockholder furnished in writing by or on behalf of such Selling Stockholder expressly for use in the Prospectus, except that the representations and warranties set forth in this paragraph 2(h) do not apply to statements or omissions in the Registration Statement or the Prospectus based upon information relating to any Underwriter furnished to the Company in writing by such Underwriter through you expressly for

use therein. “Insider” shall mean the individual Selling Stockholders that are selling Shares that are beneficially owned (within the meaning of Rule 13d 3 of the Exchange Act) by an officer and/or director of the Company and shall include Conexant Systems, Inc.

3. Agreements to Sell and Purchase. Each Seller, severally and not jointly, hereby agrees to sell to the several Underwriters, and each Underwriter, upon the basis of the representations and warranties herein contained, but subject to the conditions hereinafter stated, agrees, severally and not jointly, to purchase from such Seller at $ a share (the “Purchase Price”) the number of Firm Shares (subject to such adjustments to eliminate fractional shares as you may determine) that bears the same proportion to the number of Firm Shares to be sold by such Seller as the number of Firm Shares set forth in Schedule II hereto opposite the name of such Underwriter bears to the total number of Firm Shares.

On the basis of the representations and warranties contained in this Agreement, and subject to its terms and conditions, the Company agrees to sell to the Underwriters the Additional Shares, and the Underwriters shall have the right to purchase, severally and not jointly, up to 1,500,000 Additional Shares at the Purchase Price. You may exercise this right on behalf of the Underwriters in whole or from time to time in part by giving written notice of each election to exercise the option not later than 30 days after the date of this Agreement. Any exercise notice shall specify the number of Additional Shares to be purchased by the Underwriters and the date on which such shares are to be purchased. Each purchase date must be at least one business day after the written notice is given and may not be earlier than the closing date for the Firm Shares nor later than ten business days after the date of such notice. Additional Shares may be purchased as provided in Section 5 hereof solely for the purpose of covering over-allotments made in connection with the offering of the Firm Shares. On each day, if any, that Additional Shares are to be purchased (an “Option Closing Date”), each Underwriter agrees, severally and not jointly, to purchase the number of Additional Shares (subject to such adjustments to eliminate fractional shares as you may determine) that bears the same proportion to the total number of Additional Shares to be purchased on such Option Closing Date as the number of Firm Shares set forth in Schedule II hereto opposite the name of such Underwriter bears to the total number of Firm Shares.

The Company hereby agrees that, without the prior written consent of Morgan Stanley & Co. Incorporated on behalf of the Underwriters, it will not, during the period ending 180 days after the date of the Prospectus, (i) offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, lend, or otherwise transfer or dispose of, directly or indirectly, any shares of Common Stock or any securities convertible into or exercisable or exchangeable for

Common Stock or (ii) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of the Common Stock, whether any such 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 restrictions contained in the preceding paragraph shall not apply to (A) the Shares to be sold hereunder, (B) the issuance by the Company of shares of Common Stock upon the exercise of an option or warrant or the conversion of a security outstanding on the date hereof of which the Underwriters have been advised in writing, (C) the grant by the Company of options to purchase shares of Common Stock pursuant to its stock option plans outstanding as of the date of the Prospectus, (D) the sale by the Company of shares of Common Stock pursuant to its 2004 Employee Stock Purchase Plan or (E) transactions by any person other than the Company relating to shares of Common Stock or other securities acquired in open market transactions after the completion of the offering of the Shares.

Each Selling Stockholder hereby agrees that, without the prior written consent of Morgan Stanley & Co. Incorporated on behalf of the Underwriters, it will not, during the period ending 240 days after the date of the Prospectus, (i) offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, lend, or otherwise transfer or dispose of, directly or indirectly, any shares of Common Stock or any securities convertible into or exercisable or exchangeable for Common Stock or (ii) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of the Common Stock, whether any such 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 restrictions with respect to each Selling Stockholder contained in the preceding paragraph shall not apply to (A) the Shares to be sold hereunder, (B) transactions relating to shares of Common Stock or other securities acquired in open market transactions, unless such Selling Stockholder is subject to the reporting requirements under Section 16 of the Exchange Act; (C) transfers of shares of Common Stock or any security convertible into Common Stock by any bona fide gift or gifts, (D) transfers of shares of Common Stock or any security convertible into Common Stock by will or intestate succession to such Selling Stockholder’s spouse or lineal descendants; (E) transfers of shares of Common Stock or any security convertible into Common Stock to partners or stockholders of such Selling Stockholder; or (F) transfers of shares of Common Stock or any security convertible into Common Stock to a trust for the direct or indirect benefit of such Selling Stockholder or the immediate family of such Selling Stockholder,

provided that any such transfer shall not involve a disposition for value; provided that in the case of any transfer or distribution pursuant to clause (C), (D), (E) or (F), (i) each donee or distributee shall sign and deliver a Lock-Up Agreement substantially in the form of the Lock-Up Agreement signed by such Selling Stockholder and (ii) such Selling Stockholder shall not be required to, and shall not voluntarily, file a report under Section 16(a) of the Exchange Act, reporting a reduction in beneficial ownership of shares of Common Stock during the 240-day period after the date of the Prospectus. In addition, each Selling Stockholder, agrees that, without the prior written consent of Morgan Stanley & Co. Incorporated on behalf of the Underwriters, it will not, during the period ending 240 days after the date of the Prospectus, make any demand for, or exercise any right with respect to, the registration of any shares of Common Stock or any security convertible into or exercisable or exchangeable for Common Stock.

4. Terms of Public Offering. The Sellers are advised by you that the Underwriters propose to make a public offering of their respective portions of the Shares as soon after the Registration Statement and this Agreement have become effective as in your judgment is advisable. The Sellers are further advised by you that the Shares are to be offered to the public initially at $ a share (the “Public Offering Price”) and to certain dealers selected by you at a price that represents a concession not in excess of $ a share under the Public Offering Price, and that any Underwriter may allow, and such dealers may reallow, a concession, not in excess of $ a share, to any Underwriter or to certain other dealers.

5. Payment and Delivery. Payment for the Firm Shares to be sold by each Seller shall be made to such Seller in Federal or other funds immediately available in New York City against delivery of such Firm Shares for the respective accounts of the several Underwriters at 10:00 a.m., New York City time, on , 2004, or at such other time on the same or such other date, not later than , 2004, as shall be designated in writing by you. The time and date of such payment are hereinafter referred to as the “Closing Date.”

Payment for any Additional Shares shall be made to the Company in Federal or other funds immediately available in New York City against delivery of such Additional Shares for the respective accounts of the several Underwriters at 10:00 a.m., New York City time, on the date specified in the corresponding notice described in Section 3 or at such other time on the same or on such other date, in any event not later than , 2004, as shall be designated in writing by you.

The Firm Shares and Additional Shares shall be registered in such names and in such denominations as you shall request in writing not later than one full business day prior to the Closing Date or the applicable Option Closing Date, as the case may be. The Firm Shares and Additional Shares shall be delivered to you

on the Closing Date or an Option Closing Date, as the case may be, for the respective accounts of the several Underwriters, with any transfer taxes payable in connection with the transfer of the Shares to the Underwriters duly paid, against payment of the Purchase Price therefor.

6. Conditions to the Underwriters’ Obligations. The obligations of the Sellers to sell the Shares to the Underwriters and the several obligations of the Underwriters to purchase and pay for the Shares on the Closing Date are subject to the condition that the Registration Statement shall have become effective not later than 5:00 p.m. (New York City time) on the date hereof.

The several obligations of the Underwriters are subject to the following further conditions:

(a) Subsequent to the execution and delivery of this Agreement and prior to the Closing Date:

(i) there shall not have occurred any downgrading, nor shall any notice have been given of any intended or potential downgrading or of any review for a possible change that does not indicate the direction of the possible change, in the rating accorded any of the Company’s securities by any “nationally recognized statistical rating organization,” as such term is defined for purposes of Rule 436(g)(2) under the Securities Act; and

(ii) there shall not have occurred any change, or any development involving a prospective change, in the condition, financial or otherwise, or in the earnings, business or operations of the Company and its subsidiaries, taken as a whole, from that set forth in the Prospectus (exclusive of any amendments or supplements thereto subsequent to the date of this Agreement) that, in your judgment, is material and adverse and that makes it, in your judgment, impracticable to market the Shares on the terms and in the manner contemplated in the Prospectus.

(b) The Underwriters shall have received on the Closing Date a certificate, dated the Closing Date and signed by an executive officer of the Company, to the effect set forth in Section 6(a)(i) above and to the effect that the representations and warranties of the Company contained in this Agreement are true and correct as of the Closing Date and that the Company has complied with all of the agreements and satisfied all of the conditions on its part to be performed or satisfied hereunder on or before the Closing Date.

The officer signing and delivering such certificate may rely upon the best of his or her knowledge as to proceedings threatened.

(c) The Underwriters shall have received on the Closing Date an opinion of Pillsbury Winthrop LLP (“Pillsbury”), outside counsel for the Company, dated the Closing Date, to the effect that:

(i) the Company has been duly incorporated, is validly existing as a corporation in good standing under the laws of the jurisdiction of its incorporation, has the corporate power and authority to own its property and to conduct its business as described in the Prospectus;

(ii) each subsidiary of the Company that is incorporated in the United States and is a “significant subsidiary” as defined in Rule 1-02(w) of Regulation S-X (each, a “Significant Subsidiary”) has been duly incorporated, is validly existing as a corporation in good standing under the laws of the jurisdiction of its incorporation, has the corporate power and authority to own its property and to conduct its business as described in the Prospectus;

(iii) the authorized capital stock of the Company conforms as to legal matters to the description thereof contained in the Prospectus in all material respects;

(iv) the shares of Common Stock (including the Shares to be sold by the Selling Stockholders) outstanding prior to the issuance of the Shares to be sold by the Company have been duly authorized, are validly issued and non-assessable and, to such counsel’s knowledge, fully paid;

(v) all of the issued shares of capital stock of each Significant Subsidiary have been duly authorized, are validly issued and non-assessable and, to such counsel’s knowledge, fully paid, and are owned directly by the Company, free and clear of all liens, encumbrances, equities or claims;

(vi) the Shares to be sold by the Company have been duly authorized and, when issued and delivered in accordance with the terms of this Agreement, will be validly issued, fully paid and non-assessable, and the issuance of such Shares will not be subject to any preemptive or similar rights pursuant to the certificate of

incorporation or bylaws of the Company or any of the agreements listed on Schedule A hereto (the “Material Agreements”);

(vii) this Agreement has been duly authorized, executed and delivered by the Company;

(viii) the execution and delivery by the Company of, and the performance by the Company of its obligations under, this Agreement will not contravene any provision of applicable law or the certificate of incorporation or by-laws of the Company or any of the Material Agreements, or, to such counsel’s knowledge, any judgment, order or decree of any governmental body, agency or court having jurisdiction over the Company or any Significant Subsidiary, and no consent, approval, authorization or order of, or qualification with, any governmental body or agency is required for the performance by the Company of its obligations under this Agreement, except such as may be required by the securities or Blue Sky laws of the various states in connection with the offer and sale of the Shares;

(ix) the statements relating to legal matters, documents or proceedings included in (A) the Prospectus under the captions “Risk Factors – Delaware law and our corporate charter and bylaws contain anti-takeover provisions that could delay or discourage takeover attempts that Stockholders may consider favorable;” “Related Party Transactions,” “Description of Capital Stock”, “Shares Eligible for Future Sale,” “Management—Limitation of Liability and Indemnification Matters” and “Underwriters” and (B) the Registration Statement in Items 14 and 15, in each case fairly summarize in all material respects such matters, documents or proceedings;

(x) except as set forth in the Prospectus, such counsel does not know of any legal or governmental proceedings pending or threatened to which the Company or any of its Significant Subsidiaries is a party or to which any of the properties of the Company or any of its Significant Subsidiaries is subject that, if determined adversely to the Company or any of its Significant Subsidiaries, would individually or in the aggregate have a material adverse effect on the Company and its Significant Subsidiaries, taken as a whole;

(xi) such counsel does not know of any contracts or other documents that are required to be described in the Registration

Statement or the Prospectus or to be filed as exhibits to the Registration Statement that are not described or filed as required

(xii) the Company is not, and will not immediately after the consummation of the transactions contemplated by this Agreement be, as a result of the consummation of the transactions contemplated by this Agreement, and application of the net proceeds therefrom as described in the Prospectus, required to register as an “investment company” as such term is defined in the Investment Company Act of 1940, as amended; and

(xii) the Registration Statement, at the time it was declared effective by the Commission under the Act, and the Prospectus, at the time it was transmitted for filing with the Commission pursuant to Rule 424(b) under the Act (other than, in each case, the financial statements and related schedules and other financial, statistical and accounting data included therein, as to which such counsel need not express any opinion), complied as to form in all material respects with the requirements of the Act and the rules and regulations of the Commission thereunder. In passing upon the compliance as to form of the Registration Statement and the Prospectus, such counsel may assume that the statements made therein are correct and complete.

(xiv) such counsel (A) has no reason to believe that the Registration Statement or the prospectus included therein (except for the financial statements and related schedules and other financial, statistical and accounting data included therein, as to which such counsel need not express any opinion) at the time the Registration Statement became effective contained an untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary to make the statements therein not misleading or (B) has no reason to believe that the Prospectus (except for the financial statements and related schedules and other financial, statistical and accounting data included therein, as to which such counsel need not express any opinion) as of its date or as of the Closing Date contained or contains an untrue statement of a material fact or omitted or omits to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading.

(d) The Underwriters shall have received on the Closing Date an opinion of each of MacPherson, Kwok, Chen & Heid, LLP, Shemwell,

Gregory & Courtney LLP and The Eclipse Group, intellectual property counsel to the Company, dated the Closing Date, with respect to certain intellectual property matters, to the effect that:

(i) The Company is listed in the records of the United States Patent and Trademark Office (the “PTO”) as the owner of each of the patents listed on Schedule III hereto (the “Patents”);

(ii) To such counsel’s knowledge, there is no claim of any party other than the Company to any ownership interest or recorded lien with respect to any of the Patents; and

(iii) To such counsel’s knowledge, there is no material defect of form in, and there was no material defect in the filing with the PTO of, the patent applications listed in Schedule III.

(e) The Underwriters shall have received on the Closing Date an opinion of Pillsbury, intellectual property counsel to the Company, dated the Closing Date, with respect to certain intellectual property matters, to the effect that:

To such counsel’s knowledge, other than in connection with assertions or inquiries made by PTO examiners in the ordinary course of the prosecution of the Patents, there is not pending or threatened in writing any action, suit, proceeding or claim by others (A) challenging the validity or scope of the Patents, or (B) other than as disclosed to the Underwriters in writing, asserting that any patent is infringed by the activities of the Company described in the Prospectus or by the manufacture, use or sale of any of the Company’s products.

(f) The Underwriters shall have received on the Closing Date an opinion of Pillsbury, counsel for the Selling Stockholders, dated the Closing Date, to the effect that:

(i) this Agreement has been duly authorized, executed and delivered by or on behalf of each of the Selling Stockholders;

(ii) the execution and delivery by each Selling Stockholder of, and the performance by such Selling Stockholder of its obligations under, this Agreement and the Custody Agreement and Powers of Attorney of such Selling Stockholder will not contravene any provision of applicable law, or the certificate of incorporation, by-laws, partnership agreement, limited liability company agreement, or other organizational

document of such Selling Stockholder (if such Selling Stockholder is not an individual), or, to the best of such counsel’s knowledge, any agreement or other instrument binding upon such Selling Stockholder or, to the best of such counsel’s knowledge, any judgment, order or decree of any governmental body, agency or court having jurisdiction over such Selling Stockholder, and no consent, approval, authorization or order of, or qualification with, any governmental body or agency is required for the performance by such Selling Stockholder of its obligations under this Agreement or the Custody Agreement or Power of Attorney of such Selling Stockholder, except such as may be required by the securities or Blue Sky laws of the various states in connection with offer and sale of the Shares;

(iii) each of the Selling Stockholders has valid title to, or a valid security entitlement in respect of, the Shares to be sold by such Selling Stockholder free and clear of all security interests, claims, liens, equities and other encumbrances, and each of the Selling Stockholders has the legal right and power, and all authorization and approval required by law, to enter into this Agreement and the Custody Agreement and Power of Attorney of such Selling and to sell, transfer and deliver the Shares to be sold by such Selling Stockholder or a security entitlement in respect of such Shares;

(iv) the Custody Agreement and the Power of Attorney of each Selling Stockholder have been duly authorized, executed and delivered by such Selling Stockholder and are valid and binding agreements of such Selling Stockholder; and

(v) delivery of stock certificates representing the Shares to be sold by the Selling Stockholders, endorsed to the Underwriters and payment therefor pursuant to this Agreement will pass valid title to such Shares, free and clear of any adverse claim within the meaning of Section 8-102 of the New York Uniform Commercial Code, to each Underwriter who has purchased such Shares without notice of an adverse claim.

(g) The Underwriters shall have received on the Closing Date an opinion of Fenwick & West LLP, counsel for the Underwriters, dated the Closing Date, covering the matters referred to in Sections 6(c)(vi), 6(c)(vii), 6(c)(ix) (but only as to the statements in the Prospectus under “Description of Capital Stock” and “Underwriters”) and 6(c)(xii) above.

With respect to Section 6(c)(xii) above, Pillsbury and Fenwick & West LLP may state that their beliefs are based upon their participation in the preparation of the Registration Statement and Prospectus and any amendments or supplements thereto and review and discussion of the contents thereof, but are without independent check or verification, except as specified. With respect to Section 6(f) above, Pillsbury may rely upon an opinion or opinions of counsel for any Selling Stockholders and, with respect to factual matters and to the extent such counsel deems appropriate, upon the representations of each Selling Stockholder contained herein and in the Custody Agreement and Power of Attorney of such Selling Stockholder and in other documents and instruments; provided that (A) each such counsel for the Selling Stockholders is satisfactory to your counsel, (B) a copy of each opinion so relied upon is delivered to you and is in form and substance satisfactory to your counsel, (C) copies of such Custody Agreements and Powers of Attorney and of any such other documents and instruments shall be delivered to you and shall be in form and substance satisfactory to your counsel and (D) Pillsbury shall state in their opinion that they are justified in relying on each such other opinion.

The opinions of Pillsbury, MacPherson, Kwok, Chen & Heid, LLP, Shemwell, Gregory & Courtney LLP, The Eclipse Group and Fenwick & West LLP described in Sections 6(c), 6(d), 6(e) and 6(f) above and this Section 6(g) (and any opinions of counsel for any Selling Stockholder referred to in the immediately preceding paragraph) shall be rendered to the Underwriters at the request of the Company or one or more of the Selling Stockholders, as the case may be, and shall so state therein.

(h) The Underwriters shall have received, on each of the date hereof and the Closing Date, a letter dated the date hereof or the Closing Date, as the case may be, in form and substance satisfactory to the Underwriters, from Ernst & Young, LLP, independent public accountants, containing statements and information of the type ordinarily included in accountants’ “comfort letters” to underwriters with respect to the financial statements and certain financial information contained in the Registration Statement and the Prospectus; provided that the letter delivered on the Closing Date shall use a “cut-off date” not earlier than the date hereof.

(i) The Lock-Up Agreements between you and certain stockholders, officers and directors of the Company relating to sales and certain other dispositions of shares of Common Stock or certain other securities, delivered to you on or before the date hereof, shall be in full force and effect on the Closing Date.

(j) No stop order suspending the effectiveness of the Registration Statement, any Rule 462 Registration Statement, or any post effective amendment to the Registration Statement, shall be in effect and no proceeding for such purpose shall have been instituted or threatened by the Commission.

(k) The NASD shall have raised no objection to the fairness and reasonableness of the underwriting terms and arrangements.

The several obligations of the Underwriters to purchase Additional Shares hereunder are subject to the delivery to you on the applicable Option Closing Date of such documents as you may reasonably request with respect to the good standing of the Company, the due authorization and issuance of the Additional Shares to be sold on such Option Closing Date and other matters related to the issuance of such Additional Shares.

7. Covenants of the Company. In further consideration of the agreements of the Underwriters herein contained, the Company covenants with each Underwriter as follows:

(a) To furnish to you, without charge, five signed copies of the Registration Statement (including exhibits thereto) and for delivery to each other Underwriter a conformed copy of the Registration Statement (without exhibits thereto) and to furnish to you in New York City, without charge, prior to 10:00 a.m. New York City time on the business day next succeeding the date of this Agreement and during the period mentioned in Section 7(c) below, as many copies of the Prospectus and any supplements and amendments thereto or to the Registration Statement as you may reasonably request.

(b) Before amending or supplementing the Registration Statement or the Prospectus, to furnish to you a copy of each such proposed amendment or supplement and not to file any such proposed amendment or supplement to which you reasonably object, and to file with the Commission within the applicable period specified in Rule 424(b) under the Securities Act any prospectus required to be filed pursuant to such Rule.

(c) If, during such period after the first date of the public offering of the Shares as in the opinion of counsel for the Underwriters the Prospectus is required by law to be delivered in connection with sales by an Underwriter or dealer, any event shall occur or condition exist as a result of which it is necessary to amend or supplement the Prospectus in order to make the statements therein, in the light of the circumstances

when the Prospectus is delivered to a purchaser, not misleading, or if, in the opinion of counsel for the Underwriters, it is necessary to amend or supplement the Prospectus to comply with applicable law, forthwith to prepare, file with the Commission and furnish, at its own expense, to the Underwriters and to the dealers (whose names and addresses you will furnish to the Company) to which Shares may have been sold by you on behalf of the Underwriters and to any other dealers upon request, either amendments or supplements to the Prospectus so that the statements in the Prospectus as so amended or supplemented will not, in the light of the circumstances when the Prospectus is delivered to a purchaser, be misleading or so that the Prospectus, as amended or supplemented, will comply with law.

(d) To endeavor to qualify the Shares for offer and sale under the securities or Blue Sky laws of such jurisdictions as you shall reasonably request.

(e) To make generally available to the Company’s security holders and to you as soon as practicable an earning statement covering the twelve-month period ending , 2005 that satisfies the provisions of Section 11(a) of the Securities Act and the rules and regulations of the Commission thereunder.

(f) To place stop transfer orders on any Directed Shares that have been sold to Participants subject to the three month restriction on sale, transfer, assignment, pledge or hypothecation imposed by NASD Regulation, Inc. under its Interpretative Material 2110-1 on free-riding and withholding to the extent necessary to ensure compliance with the three month restrictions.

(g) To comply with all applicable securities and other applicable laws, rules and regulations in each jurisdiction in which the Directed Shares are offered in connection with the Directed Share Program.

8. Expenses. Whether or not the transactions contemplated in this Agreement are consummated or this Agreement is terminated, the Sellers agree to pay or cause to be paid all expenses incident to the performance of their obligations under this Agreement, including: (i) the fees, disbursements and expenses of the Company’s counsel, the Company’s accountants and counsel for the Selling Stockholders in connection with the registration and delivery of the Shares under the Securities Act and all other fees or expenses in connection with the preparation and filing of the Registration Statement, any preliminary prospectus, the Prospectus and amendments and supplements to any of the foregoing, including all printing costs associated therewith, and the mailing and

delivering of copies thereof to the Underwriters and dealers, in the quantities hereinabove specified, (ii) all costs and expenses related to the transfer and delivery of the Shares to the Underwriters, including any transfer or other taxes payable thereon, (iii) the cost of printing or producing any Blue Sky or Legal Investment memorandum in connection with the offer and sale of the Shares under state securities laws and all expenses in connection with the qualification of the Shares for offer and sale under state securities laws as provided in Section 7(d) hereof, including filing fees and the reasonable fees and disbursements of counsel for the Underwriters in connection with such qualification and in connection with the Blue Sky or Legal Investment memorandum, (iv) all filing fees and the reasonable fees and disbursements of counsel to the Underwriters incurred in connection with the review and qualification of the offering of the Shares by the National Association of Securities Dealers, Inc., (v) all fees and expenses in connection with the preparation and filing of the registration statement on Form 8-A relating to the Common Stock and all costs and expenses incident to listing the Shares on the Nasdaq National Market, (vi) the cost of printing certificates representing the Shares, (vii) the costs and charges of any transfer agent, registrar or depositary, (viii) the costs and expenses of the Company relating to investor presentations on any “road show” undertaken in connection with the marketing of the offering of the Shares, 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 with the prior approval of the Company, travel and lodging expenses of the representatives and officers of the Company and any such consultants, and the cost of any aircraft chartered in connection with the road show, (ix) the document production charges and expenses associated with printing this Agreement, (x) all fees and disbursements of counsel incurred by the Underwriters in connection with the Directed Share Program and stamp duties, similar taxes or duties or other taxes, if any, incurred by the Underwriters in connection with the Directed Share Program, and (xi) all other costs and expenses incident to the performance of the obligations of the Company hereunder for which provision is not otherwise made in this Section. It is understood, however, that except as provided in this Section 8, Section 9 entitled “Indemnity and Contribution”, Section 10 entitled “Directed Share Program Indemnification” and the last paragraph of Section 12 below, the Underwriters will pay all of their costs and expenses, including fees and disbursements of their counsel, stock transfer taxes payable on resale of any of the Shares by them and any advertising expenses connected with any offers they may make.

The provisions of this Section shall not supersede or otherwise affect any agreement that the Sellers may otherwise have for the allocation of such expenses among themselves.

9. Indemnity and Contribution.

(a) The Company and the Selling Stockholders that are Insiders, jointly and severally, agree to indemnify and hold harmless each Underwriter, each person, if any, who controls any Underwriter within the meaning of either Section 15 of the Securities Act or Section 20 of the Exchange Act and each affiliate of any Underwriter within the meaning of Rule 405 under the Securities Act, from and against any and all losses, claims, damages and liabilities (including, without limitation, any legal or other expenses reasonably incurred in connection with defending or investigating any such action or claim) caused by any untrue statement or alleged untrue statement of a material fact contained in the Registration Statement or any amendment thereof, any preliminary prospectus or the Prospectus (as amended or supplemented if the Company shall have furnished any amendments or supplements thereto), or caused by any omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, except insofar as such losses, claims, damages or liabilities are caused by any such untrue statement or omission or alleged untrue statement or omission based upon information relating to any Underwriter furnished to the Company in writing by such Underwriter through you expressly for use therein; provided, however that the foregoing indemnity agreement with respect to any preliminary prospectus or the Prospectus shall not inure to the benefit of any Underwriter from whom the person asserting any such losses, claims, damages or liabilities purchased the Shares, or any person controlling such Underwriter, if a copy of the Prospectus (as then amended or supplemented if the Company shall have furnished any amendments or supplements thereto) was not sent or given by or on behalf of such Underwriter to such person, if required by law so to have been delivered, at or prior to the written confirmation of the sale of the Shares to such person, and if the Prospectus (as so amended or supplemented) would have cured the defect giving rise to such loss, claim, damage or liability.

(b) Each Selling Stockholder (other than the Selling Stockholders that are Insiders), jointly and severally, agrees to indemnify and hold harmless each Underwriter, each person, if any, who controls any Underwriter within the meaning of either Section 15 of the Securities Act or Section 20 of the Exchange Act and each affiliate of any Underwriter within the meaning of Rule 405 under the Securities Act, from and against any and all losses, claims, damages and liabilities (including, without limitation, any legal or other expenses reasonably incurred in connection with defending or investigating any such action or claim) caused by any untrue statement or alleged untrue statement of a material fact contained in the Registration Statement or any amendment thereof, any preliminary prospectus or the Prospectus (as amended or supplemented if the Company

shall have furnished any amendments or supplements thereto), or caused by any omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, but only with reference to information relating to such Selling Stockholder furnished in writing by or on behalf of such Selling Stockholder expressly for use in the Registration Statement, any preliminary prospectus, the Prospectus or any amendments or supplements thereto. The aggregate liability of each Selling Stockholder that is not an Insider under the indemnity agreement contained in this paragraph and the contribution agreement contained in paragraphs 9(e) and (f) below shall be limited to an amount equal to the net proceeds received by such Selling Stockholder from the offering of the Shares sold by such Selling Stockholder under this Agreement.

(c) Each Underwriter agrees, severally and not jointly, to indemnify and hold harmless the Company, the Selling Stockholders, the directors of the Company, the officers of the Company who sign the Registration Statement and each person, if any, who controls the Company or any Selling Stockholder within the meaning of either Section 15 of the Securities Act or Section 20 of the Exchange Act to the same extent as the foregoing indemnity from the Sellers to such Underwriter, but only with reference to information relating to such Underwriter furnished to the Company in writing by such Underwriter through you expressly for use in the Registration Statement, any preliminary prospectus, the Prospectus or any amendments or supplements thereto.

(d) In case any proceeding (including any governmental investigation) shall be instituted involving any person in respect of which indemnity may be sought pursuant to Section 9(a),9(b) or 9(c), such person (the “indemnified party”) shall promptly notify the person against whom such indemnity may be sought (the “indemnifying party”) in writing and the indemnifying party, upon request of the indemnified party, shall retain counsel reasonably satisfactory to the indemnified party to represent the indemnified party and any others the indemnifying party may designate in such proceeding and shall pay the fees and disbursements of such counsel related to such proceeding. In any such proceeding, any indemnified party shall have the right to retain its own counsel, but the fees and expenses of such counsel shall be at the expense of such indemnified party unless (i) the indemnifying party and the indemnified party shall have mutually agreed to the retention of such counsel or (ii) the named parties to any such proceeding (including any impleaded parties) include both the indemnifying party and the indemnified party and representation of both parties by the same counsel would be inappropriate due to actual or potential differing interests between them. It is

understood that the indemnifying party shall not, in respect of the legal expenses of any indemnified party in connection with any proceeding or related proceedings in the same jurisdiction, be liable for (i) the fees and expenses of more than one separate firm (in addition to any local counsel) for all Underwriters and all persons, if any, who control any Underwriter within the meaning of either Section 15 of the Securities Act or Section 20 of the Exchange Act or who are affiliates of any Underwriter within the meaning of Rule 405 under the Securities Act, (ii) the fees and expenses of more than one separate firm (in addition to any local counsel) for the Company, its directors, its officers who sign the Registration Statement and each person, if any, who controls the Company within the meaning of either such Section and (iii) the fees and expenses of more than one separate firm (in addition to any local counsel) for all Selling Stockholders and all persons, if any, who control any Selling Stockholder within the meaning of either such Section, and that all such fees and expenses shall be reimbursed as they are incurred. In the case of any such separate firm for the Underwriters and such control persons and affiliates of any Underwriters, such firm shall be designated in writing by Morgan Stanley & Co. Incorporated. In the case of any such separate firm for the Company, and such directors, officers and control persons of the Company, such firm shall be designated in writing by the Company. In the case of any such separate firm for the Selling Stockholders and such control persons of any Selling Stockholders, such firm shall be designated in writing by the persons named as attorneys-in-fact for the Selling Stockholders under the Powers of Attorney. The indemnifying party shall not be liable for any settlement of any proceeding effected without its written consent, but if settled with such consent or if there be a final judgment for the plaintiff, the indemnifying party agrees to indemnify the indemnified party from and against any loss or liability by reason of such settlement or judgment. Notwithstanding the foregoing sentence, if at any time an indemnified party shall have requested an indemnifying party to reimburse the indemnified party for fees and expenses of counsel as contemplated by the second and third sentences of this paragraph, the indemnifying party agrees that it shall be liable for any settlement of any proceeding effected without its written consent if (i) such settlement is entered into more than 30 days after receipt by such indemnifying party of the aforesaid request and (ii) such indemnifying party shall not have reimbursed the indemnified party in accordance with such request prior to the date of such settlement. No indemnifying party shall, without the prior written consent of the indemnified party, effect any settlement of any pending or threatened proceeding in respect of which any indemnified party is or could have been a party and indemnity could have been sought hereunder by such indemnified party, unless such settlement includes an

unconditional release of such indemnified party from all liability on claims that are the subject matter of such proceeding.

(e) To the extent the indemnification provided for in Section 9(a), 9(b) or 9(c) is unavailable to an indemnified party or insufficient in respect of any losses, claims, damages or liabilities referred to therein, then each indemnifying party under such paragraph, in lieu of indemnifying such indemnified party thereunder, shall contribute to the amount paid or payable by such indemnified party as a result of such losses, claims, damages or liabilities (v) in such proportion as is appropriate to reflect the relative benefits received by the Sellers on the one hand and the Underwriters on the other hand from the offering of the Shares or (ii) if the allocation provided by clause 9(e)(i) above is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause 9(e)(i) above but also the relative fault of the Sellers on the one hand and of the Underwriters on the other hand in connection with the statements or omissions that resulted in such losses, claims, damages or liabilities, as well as any other relevant equitable considerations. The relative benefits received by the Sellers on the one hand and the Underwriters on the other hand in connection with the offering of the Shares shall be deemed to be in the same respective proportions as the net proceeds from the offering of the Shares (before deducting expenses) received by each Seller and the total underwriting discounts and commissions received by the Underwriters, in each case as set forth in the table on the cover of the Prospectus, bear to the aggregate Public Offering Price of the Shares. The relative fault of the Sellers on the one hand and the Underwriters on the other hand shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Sellers or by the Underwriters and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. The Underwriters’ respective obligations to contribute pursuant to this Section 9 are several in proportion to the respective number of Shares they have purchased hereunder, and not joint. The aggregate liability of each Selling Stockholder under the contribution agreement contained in this paragraph and paragraph 9(f) and under the indemnification agreement contained in paragraphs 9(a) and 9(b) above shall be limited to an amount equal to the net proceeds received by such Selling Stockholder from the offering of the Shares sold by such Selling Stockholder under this Agreement.

(f) The Sellers and the Underwriters agree that it would not be just or equitable if contribution pursuant to this Section 9 were determined by

pro rata allocation (even if the Underwriters were treated as one entity for such purpose) or by any other method of allocation that does not take account of the equitable considerations referred to in Section 9(e). The amount paid or payable by an indemnified party as a result of the losses, claims, damages and liabilities referred to in the immediately preceding paragraph shall be deemed to include, subject to the limitations set forth above, any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this Section 9, no Underwriter shall be required to contribute any amount in excess of the amount by which the total price at which the Shares underwritten by it and distributed to the public were offered to the public exceeds the amount of any damages that such Underwriter has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The remedies provided for in this Section 9 are not exclusive and shall not limit any rights or remedies which may otherwise be available to any indemnified party at law or in equity.

(g) The indemnity and contribution provisions contained in this Section 9 and the representations, warranties and other statements of the Company and the Selling Stockholders contained in this Agreement shall remain operative and in full force and effect regardless of (i) any termination of this Agreement, (ii) any investigation made by or on behalf of any Underwriter, any person controlling any Underwriter or any affiliate of any Underwriter, any Selling Stockholder or any person controlling any Selling Stockholder, or the Company, its officers or directors or any person controlling the Company and (iii) acceptance of and payment for any of the Shares.

10. Directed Share Program Indemnification.

(a) The Company agrees to indemnify and hold harmless Morgan Stanley and its affiliates and each person, if any, who controls Morgan Stanley or its affiliates within the meaning of either Section 15 of the Securities Act or Section 20 of the Exchange Act (“Morgan Stanley Entities”), from and against any and all losses, claims, damages and liabilities (including, without limitation, any legal or other expenses reasonably incurred in connection with defending or investigating any such action or claim) (i) caused by any untrue statement or alleged untrue statement of a material fact contained in any material prepared by or with the consent of the Company for distribution to Participants in connection

with the Directed Share Program, or caused by any omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading; (ii) caused by the failure of any Participant to pay for and accept delivery of Directed Shares that the Participant has agreed to purchase; or (iii) related to, arising out of, or in connection with the Directed Share Program other than losses, claims, damages or liabilities (or expenses relating thereto) that are finally judicially determined to have resulted from the bad faith or gross negligence of Morgan Stanley Entities.

(b) In case any proceeding (including any governmental investigation) shall be instituted involving any Morgan Stanley Entity in respect of which indemnity may be sought pursuant to Section 10(a), the Morgan Stanley Entity seeking indemnity shall promptly notify the Company in writing and the Company, upon request of the Morgan Stanley Entity, shall retain counsel reasonably satisfactory to the Morgan Stanley Entity to represent the Morgan Stanley Entity and any others the Company may designate in such proceeding and shall pay the fees and disbursements of such counsel related to such proceeding. In any such proceeding, any Morgan Stanley Entity shall have the right to retain its own counsel, but the fees and expenses of such counsel shall be at the expense of such Morgan Stanley Entity unless (i) the Company shall have agreed to the retention of such counsel or (ii) the named parties to any such proceeding (including any impleaded parties) include both the Company and the Morgan Stanley Entity and representation of both parties by the same counsel would be inappropriate due to actual or potential differing interests between them. The Company shall not, in respect of the legal expenses of the Morgan Stanley Entities in connection with any proceeding or related proceedings the same jurisdiction, be liable for the fees and expenses of more than one separate firm (in addition to any local counsel) for all Morgan Stanley Entities. Any such firm for the Morgan Stanley Entities shall be designated in writing by Morgan Stanley. The Company shall not be liable for any settlement of any proceeding effected without its written consent, but if settled with such consent or if there be a final judgment for the plaintiff, the Company agrees to indemnify the Morgan Stanley Entities from and against any loss or liability by reason of such settlement or judgment. Notwithstanding the foregoing sentence, if at any time a Morgan Stanley Entity shall have requested the Company to reimburse it for fees and expenses of counsel as contemplated by the second and third sentences of this paragraph, the Company agrees that it shall be liable for any settlement of any proceeding effected without its written consent if (i) such settlement is entered into more than 30 days after receipt by the Company of the aforesaid request and (ii) the Company shall not have reimbursed the Morgan Stanley Entity in accordance with

such request prior to the date of such settlement. The Company shall not, without the prior written consent of Morgan Stanley, effect any settlement of any pending or threatened proceeding in respect of which any Morgan Stanley Entity is or could have been a party and indemnity could have been sought hereunder by such Morgan Stanley Entity, unless such settlement includes an unconditional release of the Morgan Stanley Entities from all liability on claims that are the subject matter of such proceeding.

(c) To the extent the indemnification provided for in Section 10(a) is unavailable to a Morgan Stanley Entity or insufficient in respect of any losses, claims, damages or liabilities referred to therein, then the Company, in lieu of indemnifying the Morgan Stanley Entity thereunder, shall contribute to the amount paid or payable by the Morgan Stanley Entity as a result of such losses, claims, damages or liabilities (i) in such proportion as is appropriate to reflect the relative benefits received by the Company on the one hand and the Morgan Stanley Entities on the other hand from the offering of the Directed Shares or (ii) if the allocation provided by clause 10(c)(i) above is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause 10(c)(i) above but also the relative fault of the Company on the one hand and of the Morgan Stanley Entities on the other hand in connection with the statements or omissions that resulted in such losses, claims, damages or liabilities, as well as any other relevant equitable considerations. The relative benefits received by the Company on the one hand and of the Morgan Stanley Entities on the other hand in connection with the offering of the Directed Shares shall be deemed to be in the same respective proportions as the net proceeds from the offering of the Directed Shares (before deducting expenses) and the total underwriting discounts and commissions received by the Morgan Stanley Entities for the Directed Shares, bear to the aggregate Public Offering Price of the Shares. If the loss, claim, damage or liability is caused by an untrue or alleged untrue statement of a material fact, the relative fault of the Company on the one hand and the Morgan Stanley Entities on the other hand shall be determined by reference to, among other things, whether the untrue or alleged untrue statement or the omission or alleged omission relates to information supplied by the Company or by the Morgan Stanley Entities and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission.

(d) The Company and the Morgan Stanley Entities agree that it would not be just or equitable if contribution pursuant to this Section 10 were determined by pro rata allocation (even if the Morgan Stanley Entities were treated as one entity for such purpose) or by any other

method of allocation that does not take account of the equitable considerations referred to in Section 10(c). The amount paid or payable by the Morgan Stanley Entities as a result of the losses, claims, damages and liabilities referred to in the immediately preceding paragraph shall be deemed to include, subject to the limitations set forth above, any legal or other expenses reasonably incurred by the Morgan Stanley Entities in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this Section 10, no Morgan Stanley Entity shall be required to contribute any amount in excess of the amount by which the total price at which the Directed Shares distributed to the public were offered to the public exceeds the amount of any damages that such Morgan Stanley Entity has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. The remedies provided for in this Section 10 are not exclusive and shall not limit any rights or remedies which may otherwise be available to any Morgan Stanley Entity at law or in equity.

(e) The indemnity and contribution provisions contained in this Section 10 shall remain operative and in full force and effect regardless of (i) any termination of this Agreement, (ii) any investigation made by or on behalf of any Morgan Stanley Entity or the Company, its officers or directors or any person controlling the Company and (iii) acceptance of and payment for any of the Directed Shares.

11. Termination. The Underwriters may terminate this Agreement by notice given by you to the Company, if after the execution and delivery of this Agreement and prior to the Closing Date (i) trading generally shall have been suspended or materially limited on, or by, as the case may be, any of the New York Stock Exchange, the American Stock Exchange, the Nasdaq National Market, the Chicago Board of Options Exchange, the Chicago Mercantile Exchange or the Chicago Board of Trade, (ii) trading of any securities of the Company shall have been suspended on any exchange or in any over-the-counter market, (iii) a material disruption in securities settlement, payment or clearance services in the United States or other relevant jurisdiction shall have occurred, (iv) any moratorium on commercial banking activities shall have been declared by Federal or New York State authorities or (v) there shall have occurred any outbreak or escalation of hostilities, or any change in financial markets or any calamity or crisis that, in your judgment, is material and adverse and which, singly or together with any other event specified in this clause (v), makes it, in your judgment, impracticable or inadvisable to proceed with the offer, sale or delivery of the Shares on the terms and in the manner contemplated in the Prospectus.

12. Effectiveness; Defaulting Underwriters. This Agreement shall become effective upon the execution and delivery hereof by the parties hereto.

If, on the Closing Date or an Option Closing Date, as the case may be, any one or more of the Underwriters shall fail or refuse to purchase Shares that it has or they have agreed to purchase hereunder on such date, and the aggregate number of Shares which such defaulting Underwriter or Underwriters agreed but failed or refused to purchase is not more than one-tenth of the aggregate number of the Shares to be purchased on such date, the other Underwriters shall be obligated severally in the proportions that the number of Firm Shares set forth opposite their respective names in Schedule II bears to the aggregate number of Firm Shares set forth opposite the names of all such non-defaulting Underwriters, or in such other proportions as you may specify, to purchase the Shares which such defaulting Underwriter or Underwriters agreed but failed or refused to purchase on such date; provided that in no event shall the number of Shares that any Underwriter has agreed to purchase pursuant to this Agreement be increased pursuant to this Section 12 by an amount in excess of one-ninth of such number of Shares without the written consent of such Underwriter. If, on the Closing Date, any Underwriter or Underwriters shall fail or refuse to purchase Firm Shares and the aggregate number of Firm Shares with respect to which such default occurs is more than one-tenth of the aggregate number of Firm Shares to be purchased, and arrangements satisfactory to you, the Company and the Selling Stockholders for the purchase of such Firm Shares are not made within 36 hours after such default, this Agreement shall terminate without liability on the part of any non-defaulting Underwriter, the Company or the Selling Stockholders. In any such case either you or the relevant Sellers shall have the right to postpone the Closing Date, but in no event for longer than seven days, in order that the required changes, if any, in the Registration Statement and in the Prospectus or in any other documents or arrangements may be effected. If, on an Option Closing Date, any Underwriter or Underwriters shall fail or refuse to purchase Additional Shares and the aggregate number of Additional Shares with respect to which such default occurs is more than one-tenth of the aggregate number of Additional Shares to be purchased on such Option Closing Date, the non-defaulting Underwriters shall have the option to (i) terminate their obligation hereunder to purchase the Additional Shares to be sold on such Option Closing Date or (ii) purchase not less than the number of Additional Shares that such non-defaulting Underwriters would have been obligated to purchase in the absence of such default. Any action taken under this paragraph shall not relieve any defaulting Underwriter from liability in respect of any default of such Underwriter under this Agreement.

If this Agreement shall be terminated by the Underwriters, or any of them, because of any failure or refusal on the part of any Seller to comply with the terms or to fulfill any of the conditions of this Agreement, or if for any reason any Seller shall be unable to perform its obligations under this Agreement, the Sellers will reimburse the Underwriters or such Underwriters as have so terminated this Agreement with respect to themselves, severally, for all out-of-pocket expenses

(including the fees and disbursements of their counsel) reasonably incurred by such Underwriters in connection with this Agreement or the offering contemplated hereunder.

13. Counterparts. This Agreement may be signed in two or more counterparts, each of which shall be an original, with the same effect as if the signatures thereto and hereto were upon the same instrument.

14. Applicable Law. This Agreement shall be governed by and construed in accordance with the internal laws of the State of New York.

15. Headings. The headings of the sections of this Agreement have been inserted for convenience of reference only and shall not be deemed a part of this Agreement.

16. Notices. Except as otherwise herein provided, all statements, requests, notices and agreements shall be in writing or by telegram and, if to the Underwriters, shall be sufficient in all respects if delivered or sent to the Underwriters at Morgan Stanley & Co. Incorporated, New York, NY 10036, Attention: Global Capital Markets Syndicate Desk, copies to Gordon K. Davidson, Fenwick & West LLP, counsel to the Underwriters, at 801 California Street, Mountain View, CA 94041, and if to the Company, shall be sufficient in all respects if delivered or sent to the offices of the Company at 148 E. Brokaw Road, San Jose, CA 95112 Attention: Corporate Secretary, copies to Jorge del Calvo, Pillsbury Winthrop LLP, counsel to the Company, at 2475 Hanover Street, Palo Alto, CA 94304.

17. Parties at Interest. The Agreement herein set forth has been and is made solely for the benefit of the Underwriters and the Company and to the extent provided in Section 7 hereof the controlling persons, partners, directors and officers referred to in such section, and their respective successors, assigns, heirs, personal representatives and executors and administrators. No other person, partnership, association or corporation (including a purchaser, as such purchaser, from any of the Underwriters) shall acquire or have any right under or by virtue of this Agreement.

18. Successors and Assigns. This Agreement shall be binding upon the Underwriters and the Company and their successors and assigns and any successor or assign of any substantial portion of the Company’s and any of the Underwriters’ respective businesses and/or assets.

19. Partial Unenforceability. The invalidity or unenforceability of any section, subsection, paragraph or provision of this Agreement shall not affect the

validity or enforceability of any other section, subsection, paragraph or provision hereof. If any section, subsection, paragraph or provision of this Agreement is for any reason determined to be invalid or unenforceable, there shall be deemed to be made such minor changes (and only such minor changes) as are necessary to make it valid and enforceable.

20. Entire Agreement. This Agreement constitutes the entire agreement of the parties to this Agreement and supersedes all prior written or oral and all contemporaneous oral agreements, understandings and negotiations with respect to the subject matter hereof.

21. Amendments. This Agreement may only be amended or modified in writing, signed by all of the parties hereto, and no condition herein (express or implied) may be waived unless waived in writing by each party whom the condition is meant to benefit.

22. Sophisticated Parties. Each of the parties hereto acknowledges that it is a sophisticated business person who was adequately represented by counsel during negotiations regarding the provisions hereof, including, without limitation, the indemnification and contribution provisions of Sections 9 and 10, and is fully informed regarding said provisions.


Very truly yours,
SIRF TECHNOLOGY HOLDINGS, INC.

By:

		Name:
		Title:


The Selling Stockholders named in Schedule I hereto, acting severally

By:

		Attorney-in-Fact

Accepted as of the date hereof

Morgan Stanley & Co. Incorporated

Credit Suisse First Boston LLC

Deutsche Bank Securities Inc.

Thomas Weisel Partners LLC


Acting severally on behalf of themselves and the several Underwriters named in Schedule II hereto.
By: Morgan Stanley & Co. Incorporated

By:

		Name:
		Title:

SCHEDULE I


Selling Stockholder		Number of Firm Shares To Be Sold










Total: . . . . . . . . . . . . . . . . . . . . . . .

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SCHEDULE II


Underwriter		Number of Firm Shares To Be Purchased


Morgan Stanley & Co. Incorporated
Credit Suisse First Boston LLC
Deutsche Bank Securities Inc.
Thomas Weisel Partners LLC






Total: . . . . . . . . . . . . . . . . . . . . . . .

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Exhibit A

Form of Lock-Up Agreement

Morgan Stanley & Co. Incorporated

Credit Suisse First Boston LLC

Deutsche Bank Securities Inc.

Thomas Weisel Partners LLC


c/o		Morgan Stanley & Co. Incorporated
		1585 Broadway
		New York, NY 10036

Dear Sirs and Mesdames:

The undersigned understands that Morgan Stanley & Co. Incorporated (“Morgan Stanley”) proposes to enter into an Underwriting Agreement (the “Underwriting Agreement”) with SiRF Technology Holdings, Inc., a Delaware corporation (the “Company”), providing for the initial public offering (the “Public Offering”) by the several Underwriters, including Morgan Stanley (the “Underwriters”), of the Common Stock, $0.0001 par value per share, of the Company (the “Common Stock”).

To induce the Underwriters that may participate in the Public Offering to continue their efforts in connection with the Public Offering, the undersigned hereby agrees that, without the prior written consent of Morgan Stanley on behalf of the Underwriters, it will not, during the period commencing on the date hereof and ending 180 days after the date of the final prospectus relating to the Public Offering (the “Prospectus”), (1) 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, lend, or otherwise transfer or dispose of, directly or indirectly, any shares of Common Stock or any securities convertible into or exercisable or exchangeable for Common Stock or (2) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of Common Stock, whether any such transaction described in clause (1) or (2) 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 sale of any Shares to the Underwriters pursuant to the Underwriting Agreement; (b) transactions relating to shares of Common Stock or other securities acquired in open market transactions; provided, however, that if the undersigned person is subject to reporting requirements under Section 16 of the Securities Exchange Act of 1934, as amended, all shares acquired in the open market will be subject to this Lock-Up Agreement; (c) transfers of shares of Common Stock or any security convertible into Common Stock by any bona fide gift or gifts, (d) transfers of shares of Common Stock or any security convertible into Common Stock by will or intestate succession to the undersigned’s spouse or lineal descendants; (e) transfers of shares of Common Stock or any security convertible into Common Stock to partners or stockholders of the undersigned; or (f) transfers of shares of Common Stock or any security convertible into Common Stock to a trust for the direct or indirect benefit of the undersigned or the immediate family of the undersigned, provided that any such transfer shall not involve a disposition for value; provided that in the case of any transfer or distribution pursuant to clause (c) (d), (e) or (f), (i) each donee or distributee shall sign

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and deliver a lock-up letter substantially in the form of this letter and (ii) the undersigned shall not be required to, and shall not voluntarily, file a report under Section 16(a) of the Securities Exchange Act of 1934, reporting a reduction in beneficial ownership of shares of Common Stock during the restricted period referred to in the foregoing sentence. In addition, the undersigned agrees that, without the prior written consent of Morgan Stanley on behalf of the Underwriters, it will not, during the period commencing on the date hereof and ending 180 days after the date of the Prospectus, make any demand for or exercise any right with respect to, the registration of any shares of Common Stock or any security convertible into or exercisable or exchangeable for Common Stock. The undersigned also consents and agrees to the entry of stop transfer instructions with the Company’s transfer agent and registrar against the transfer of the undersigned’s shares of Common Stock except in compliance with the foregoing restrictions.

The undersigned understands that the Company and the Underwriters are relying upon this agreement in proceeding toward consummation of the Public Offering. The undersigned further understands that this agreement is irrevocable and shall be binding upon the undersigned’s heirs, legal representatives, successors and assigns.

Notwithstanding anything to the contrary herein, if the Public Offering shall not have occurred prior to July 1, 2004, this letter agreement shall be of no further force and effect.

Whether or not the Public Offering actually occurs depends on a number of factors, including market conditions. Any Public Offering will only be made pursuant to an Underwriting Agreement, the terms of which are subject to negotiation between the Company and the Underwriters.


Very truly yours,

By:

		(Print Name)



		(Address)

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Exhibit B

Form of Selling Stockholder Lock-Up Agreement

Morgan Stanley & Co. Incorporated

Credit Suisse First Boston LLC

Deutsche Bank Securities Inc.

Thomas Weisel Partners LLC


c/o		Morgan Stanley & Co. Incorporated
		1585 Broadway
		New York, NY 10036

Dear Sirs and Mesdames:

To induce the Underwriters that may participate in the Public Offering to continue their efforts in connection with the Public Offering, the undersigned hereby agrees that, without the prior written consent of Morgan Stanley on behalf of the Underwriters, it will not, during the period commencing on the date hereof and ending 240 days after the date of the final prospectus relating to the Public Offering (the “Prospectus”), (1) 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, lend, or otherwise transfer or dispose of, directly or indirectly, any shares of Common Stock or any securities convertible into or exercisable or exchangeable for Common Stock or (2) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of Common Stock, whether any such transaction described in clause (1) or (2) 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 sale of any Shares to the Underwriters pursuant to the Underwriting Agreement; (b) transactions relating to shares of Common Stock or other securities acquired in open market transactions; provided, however, that if the undersigned person is subject to reporting requirements under Section 16 of the Securities Exchange Act of 1934, as amended, all shares acquired in the open market will be subject to this Lock-Up Agreement; (c) transfers of shares of Common Stock or any security convertible into Common Stock by any bona fide gift or gifts, (d) transfers of shares of Common Stock or any security convertible into Common Stock by will or intestate succession to the undersigned’s spouse or lineal descendants; (e) transfers of shares of Common Stock or any security convertible into Common Stock to partners or stockholders of the undersigned; or (f) transfers of shares of Common Stock or any security convertible into Common Stock to a trust for the direct or indirect benefit of the undersigned or the immediate family of the undersigned, provided that any such transfer shall not involve a disposition for value; provided that in the case of any transfer

B-1

or distribution pursuant to clause (c) (d), (e) or (f), (i) each donee or distributee shall sign and deliver a lock-up letter substantially in the form of this letter and (ii) the undersigned shall not be required to, and shall not voluntarily, file a report under Section 16(a) of the Securities Exchange Act of 1934, reporting a reduction in beneficial ownership of shares of Common Stock during the restricted period referred to in the foregoing sentence. In addition, the undersigned agrees that, without the prior written consent of Morgan Stanley on behalf of the Underwriters, it will not, during the period commencing on the date hereof and ending 240 days after the date of the Prospectus, make any demand for or exercise any right with respect to, the registration of any shares of Common Stock or any security convertible into or exercisable or exchangeable for Common Stock. The undersigned also consents and agrees to the entry of stop transfer instructions with the Company’s transfer agent and registrar against the transfer of the undersigned’s shares of Common Stock except in compliance with the foregoing restrictions.

Notwithstanding anything to the contrary herein, if the Public Offering shall not have occurred prior to July 1, 2004, this letter agreement shall be of no further force and effect.

Very truly yours,

By:

(Print Name)

(Address)

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