4,500,000 Shares TUTOR PERINI CORPORATION Common Stock UNDERWRITING AGREEMENT

Exhibit 1.1

Execution Version

4,500,000 Shares

TUTOR PERINI CORPORATION

Common Stock

UNDERWRITING AGREEMENT

November 23, 2010

CREDIT SUISSE SECURITIES (USA) LLC

Eleven Madison Avenue,

New York, N.Y. 10010-3629

Ladies and Gentlemen:

1. Introductory. Ronald N. Tutor Separate Property Trust (the “Selling Stockholder”) agrees with Credit Suisse Securities (USA) LLC (the “Underwriter”) to sell to the Underwriter an aggregate of 4,500,000 shares (the “Offered Securities”) of common stock of Tutor Perini Corporation, a Massachusetts corporation (the “Company”), par value $1.00 per share (the “Securities”).

2. Representations and Warranties of the Company. The Company represents and warrants to, and agrees with, the Underwriter that:

(a) The Company has filed with the Commission a registration statement on Form S-3 (No. 333-161492), including a related prospectus or prospectuses, covering the registration of the Offered Securities under the Act, which has become effective. “Registration Statement” at any particular time means such registration statement in the form then filed with the Commission, including any amendment thereto, any document incorporated by reference therein and all 430B Information and all 430C Information with respect to such registration statement, that in any case has not been superseded or modified. “Registration Statement” without reference to a time means the Registration Statement as of the Effective Time. For purposes of this definition, 430B Information shall be considered to be included in the Registration Statement as of the time specified in Rule 430B.

For purposes of this Agreement:

“430B Information” means information included in a prospectus then deemed to be a part of the Registration Statement pursuant to Rule 430B(e) or retroactively deemed to be a part of the Registration Statement pursuant to Rule 430B(f).

“430C Information” means information included in a prospectus then deemed to be a part of the Registration Statement pursuant to Rule 430C.

“Act” means the Securities Act of 1933, as amended.

“Applicable Time” means 5:15 pm (New York City time) on the date of this Agreement.

“Closing Date” has the meaning defined in Section 4 hereof.

“Commission” means the Securities and Exchange Commission.

“Effective Time” of the Registration Statement relating to the Offered Securities means the time of the first contract of sale for the Offered Securities.

“Exchange Act” means the Securities Exchange Act of 1934, as amended.

“Final Prospectus” means the Statutory Prospectus that discloses the public offering price, other 430B Information and other final terms of the Offered Securities and otherwise satisfies Section 10(a) of the Act.

“General Use Issuer Free Writing Prospectus” means any Issuer Free Writing Prospectus that is intended for general distribution to prospective investors, as evidenced by its being so specified in Schedule A to this Agreement.

“Issuer Free Writing Prospectus” means any “issuer free writing prospectus,” as defined in Rule 433, relating to the Offered Securities in the form filed or required to be filed with the Commission or, if not required to be filed, in the form retained in the Company’s records pursuant to Rule 433(g).

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

“Permitted Free Writing Prospectus” has the meaning defined in Section 7 hereof.

“Rules and Regulations” means the rules and regulations of the Commission.

“Securities Laws” means, collectively, the Sarbanes-Oxley Act of 2002 (“Sarbanes-Oxley”), the Act, the Exchange Act, the Rules and Regulations, the auditing principles, rules, standards and practices applicable to auditors of “issuers” (as defined in Sarbanes-Oxley) promulgated or approved by the Public Company Accounting Oversight Board and, as applicable, the rules of the New York Stock Exchange and the NASDAQ Stock Market (“Exchange Rules”).

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“Statutory Prospectus” with reference to any particular time means the prospectus relating to the Offered Securities that is included in the Registration Statement immediately prior to that time, including all 430B Information and all 430C Information with respect to the Registration Statement. For purposes of the foregoing definition, 430B Information shall be considered to be included in the Statutory Prospectus only as of the actual time that form of prospectus (including a prospectus supplement) is filed with the Commission pursuant to Rule 424(b) and not retroactively.

Unless otherwise specified, a reference to a “rule” is to the indicated rule under the Act.

(b) (i) (A) At the time the Registration Statement initially became effective, (B) at the time of each amendment thereto for the purposes of complying with Section 10(a)(3) of the Act (whether by post-effective amendment, incorporated report or form of prospectus), (C) at the Effective Time relating to the Offered Securities and (D) on the Closing Date, the Registration Statement conformed and will conform in all respects to the requirements of the Act and the Rules and Regulations and did not and will not include any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein not misleading and (ii) (A) on its date, (B) at the time of filing the Final Prospectus pursuant to Rule 424(b) and (C) on the Closing Date, the Final Prospectus will conform in all respects to the requirements of the Act and the Rules and Regulations, and will not include any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein not misleading. The preceding sentence does not apply to statements in or omissions from any such document based upon written information furnished to the Company by the Underwriter specifically for use therein, it being understood and agreed that the only such information is that described as such in Section 9(b) hereof.

(c) The date of this Agreement is not more than three years subsequent to the initial effective time of the Registration Statement. If, immediately prior to the third anniversary of the initial effective time of the Registration Statement, any of the Offered Securities remain unsold by the Underwriter, the Company will prior to that third anniversary file, if it has not already done so, a new shelf registration statement relating to the Offered Securities, in a form satisfactory to the Underwriter, will use its best efforts to cause such registration statement to be declared effective within 180 days after that third anniversary, and will take all other action necessary or appropriate to permit the public offering and sale of the Offered Securities to continue as contemplated in the expired registration statement relating to the Offered Securities. References herein to the Registration Statement shall include such new shelf registration statement.

(d) (i) At the earliest time after the filing of the Registration Statement that the Company or another offering participant made a bona fide offer (within the

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meaning of Rule 164(h)(2)) of the Offered Securities and (ii) at the date of this Agreement, the Company was not and is not an “ineligible issuer,” as defined in Rule 405, including (x) the Company or any of the Subsidiaries in the preceding three years not having been convicted of a felony or misdemeanor or having been made the subject of a judicial or administrative decree or order as described in Rule 405 and (y) the Company in the preceding three years not having been the subject of a bankruptcy petition or insolvency or similar proceeding, not having had a registration statement be the subject of a proceeding under Section 8 of the Act and not being the subject of a proceeding under Section 8A of the Act in connection with the offering of the Securities, all as described in Rule 405.

(e) As of the Applicable Time, neither (i) the General Use Issuer Free Writing Prospectus(es) issued at or prior to the Applicable Time and, the preliminary prospectus supplement, dated November 22, 2010, including the base prospectus, dated August 21, 2009 (which is the most recent Statutory Prospectus distributed to investors generally), and the other information, if any, stated in Schedule A to this Agreement to be included in the General Disclosure Package, all considered together (collectively, the “General Disclosure Package”), nor (ii) any individual Limited Use Issuer Free Writing Prospectus, when considered together with the General Disclosure Package, included any untrue statement of a material fact or omitted to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading. The preceding sentence does not apply to statements in or omissions from any Statutory Prospectus or any Issuer Free Writing Prospectus in reliance upon and in conformity with written information furnished to the Company by the Underwriter specifically for use therein, it being understood and agreed that the only such information furnished by the Underwriter consists of the information described as such in Section 9(b) hereof.

(f) Each Issuer Free Writing Prospectus, as of its issue date and at all subsequent times through the completion of the public offer and sale of the Offered Securities or until any earlier date that the Company notified or notifies the Underwriter as described in the next sentence, did not, does not and will not include any information that conflicted, conflicts or will conflict with the information then contained in the Registration Statement. If at any time following issuance of an Issuer Free Writing Prospectus there occurred or occurs an event or development as a result of which such Issuer Free Writing Prospectus conflicted or would conflict with the information then contained in the Registration Statement or as a result of which such Issuer Free Writing Prospectus, if republished immediately following such event or development, would include an untrue statement of a material fact or omitted or would omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading, (i) the Company has promptly notified or will promptly notify the Underwriter and (ii) the Company has promptly amended or will promptly amend or supplement such Issuer Free Writing Prospectus to eliminate or correct such conflict, untrue statement or omission.

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(g) The Company has the authorized, issued and outstanding capitalization as set forth in the General Disclosure Package under the heading “Capitalization” in the “Actual” column; all of the subsidiaries of the Company are listed in Schedule B attached hereto (each, a “Subsidiary” and collectively, the “Subsidiaries”); all of the outstanding shares of capital stock of the Company (including the Offered Securities) and the Subsidiaries have been and as of the Closing Date will be, duly authorized and validly issued, are fully paid and nonassessable, will conform to the information in the General Disclosure Package and to the description thereof contained in the Final Prospectus and were not issued in violation of any preemptive or similar rights; the stockholders of the Company have no preemptive rights with respect to the Securities; all of the outstanding shares of capital stock of the Company and of each of the Subsidiaries will be free and clear of all liens, encumbrances, equities and claims (except for such liens, encumbrances, equities and claims as set forth in the General Disclosure Package) or restrictions on transferability (other than those imposed by the Act and the securities or “Blue Sky” laws of certain jurisdictions) or voting. Except as set forth in the General Disclosure Package, there are no (i) options, warrants or other rights to purchase, (ii) agreements or other obligations to issue or (iii) other rights to convert any obligation into, or exchange any securities for, shares of capital stock of or ownership interests in the Company or any of the Subsidiaries outstanding. Except for the Subsidiaries or as disclosed in the General Disclosure Package, the Company does not own, directly or indirectly, any shares of capital stock or any other equity or long-term debt securities or have any equity interest in any firm, partnership, joint venture or other entity.

(h) Except as disclosed in the General Disclosure Package, there are no contracts, agreements or understandings between the Company and any person that would give rise to a valid claim against the Company or the Underwriter for a brokerage commission, finder’s fee or other like payment in connection with this offering.

(i) Except as disclosed in the General Disclosure Package, 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 Act with respect to any securities of the Company owned or to be owned by such person or to require the Company to include such securities in the securities registered pursuant to a Registration Statement or in any securities being registered pursuant to any other registration statement filed by the Company under the Act.

(j) The Offered Securities are approved for listing on The New York Stock Exchange.

(k) Each of the Company and the Subsidiaries is duly incorporated, validly existing and in good standing under the laws of its respective jurisdiction of incorporation and has all requisite corporate power and authority to own its properties

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and conduct its business as now conducted and as described in the General Disclosure Package; each of the Company and the Subsidiaries is duly qualified to do business as a foreign corporation in good standing in all other jurisdictions where the ownership or leasing of its properties or the conduct of its business requires such qualification, except where the failure to be so qualified or be in good standing would not, individually or in the aggregate, be reasonably expected to have a material adverse effect on the management, business, condition (financial or otherwise), business prospects or results of operations of the Company and the Subsidiaries, taken as a whole (any such event, a “Material Adverse Effect”).

(l) The Company has all requisite corporate power and authority to execute, deliver and perform its obligations under this Agreement and to consummate the transactions contemplated hereby. This Agreement and the consummation by the Company of the transactions contemplated hereby have been duly and validly authorized by the Company. This Agreement has been duly and validly executed and delivered by the Company.

(m) No consent, approval, authorization or order of any court or governmental agency or body, or third party is required for the consummation by the Company of the transactions contemplated hereby, except such as have been obtained and such as may be required under state securities or “Blue Sky” laws in connection with the purchase and resale of the Offered Securities by the Underwriter. None of the Company or the Subsidiaries is (i) in violation of its certificate of incorporation or bylaws (or similar organizational document), (ii) in violation of any statute, judgment, decree, order, rule or regulation applicable to any of them or any of their respective properties or assets, except for any such breach or violation that would not, individually or in the aggregate, have a Material Adverse Effect, or (iii) in default under (nor has any event occurred that, with notice or passage of time or both, would constitute a default under) or in violation of any of the terms or provisions of any indenture, mortgage, deed of trust, loan agreement, note, lease, contract or other agreement or instrument to which any of them is a party or to which any of them or their respective properties or assets is subject (collectively, “Contracts”), except for any such breach, default, violation or event that would not, individually or in the aggregate, have a Material Adverse Effect.

(n) The execution, delivery and performance by the Company of this Agreement and the consummation of the transactions contemplated hereby (including, without limitation, the sale of the Offered Securities to the Underwriter) will not conflict with or constitute or result in a breach of or a default under (or an event that with notice or passage of time or both would constitute a default under) or violation of any of (i) the terms or provisions of any Contract, except for any such conflict, breach, violation, default or event that would not, individually or in the aggregate, have a Material Adverse Effect, (ii) the certificate of incorporation or bylaws (or similar organizational document) of the Company or any of the Subsidiaries or (iii) (assuming compliance with all

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applicable state securities or “Blue Sky” laws) any statute, judgment, decree, order, rule or regulation applicable to the Company or any of the Subsidiaries or any of their respective properties or assets, except for any such conflict, breach or violation that would not, individually or in the aggregate, have a Material Adverse Effect.

(o) The audited consolidated financial statements and the related notes thereto of the Company and the Subsidiaries included in the General Disclosure Package present fairly in all material respects the financial position, results of operations and cash flows of the Company and the Subsidiaries at the dates and for the periods to which they relate and have been prepared in accordance with U.S. generally accepted accounting principles applied on a consistent basis, except as otherwise stated therein. The summary and selected financial and statistical data in the General Disclosure Package present fairly in all material respects the information shown therein and have been prepared, derived and compiled on a basis consistent with the audited consolidated financial statements included therein, except as otherwise stated therein. Deloitte & Touche LLP is an independent registered public accounting firm within the meaning of the Act and the Rules and Regulations.

(p) There is not pending or, to the knowledge of the Company, threatened any action, suit, proceeding, inquiry or investigation to which the Company or any of the Subsidiaries is a party, or to which the property or assets of the Company or any of the Subsidiaries are subject, before or brought by any court, arbitrator or governmental agency or body that, if determined adversely to the Company or any of the Subsidiaries, would, individually or in the aggregate, have a Material Adverse Effect or that seeks to restrain, enjoin, prevent the consummation of or otherwise challenge the sale of the Offered Securities to be sold hereunder or the consummation of the other transactions described in the General Disclosure Package.

(q) Each of the Company and the Subsidiaries possesses all licenses, permits, certificates, consents, orders, approvals and other authorizations from, and has made all declarations and filings with, all of the appropriate federal, state, local and other governmental authorities, all of the appropriate self-regulatory organizations and all courts and other tribunals, presently required or necessary to own or lease, as the case may be, and to operate its respective properties and to carry on its respective businesses as set forth in the General Disclosure Package (“Permits”), except where the failure to possess or obtain such Permits would not, individually or in the aggregate, have a Material Adverse Effect; each of the Company and the Subsidiaries has fulfilled and performed all of its obligations with respect to such Permits and no event has occurred that allows, or after notice or lapse of time would allow, revocation or termination thereof or results in any other material impairment of the rights of the holder of any such Permit; and none of the Company or the Subsidiaries has received any notice of any proceeding relating to revocation or modification of any such Permit, except as described in the General Disclosure Package and except where such revocation or modification would not, individually or in the aggregate, have a Material Adverse Effect.

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(r) Since the date of the most recent financial statements appearing in the General Disclosure Package, except as described therein, (i) none of the Company or the Subsidiaries has incurred any liabilities or obligations, direct or contingent, or entered into or agreed to enter into any transactions or contracts (written or oral) not in the ordinary course of business, which liabilities, obligations, transactions or contracts would, individually or in the aggregate, be material to the management, business, condition (financial or otherwise), business prospects or results of operations of the Company and its Subsidiaries, taken as a whole, (ii) none of the Company or the Subsidiaries has 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 with respect to any of such Subsidiaries, the purchase of, or dividend or distribution on, capital stock owned by the Company) and (iii) there shall not have been any material change in the capital stock or long-term indebtedness of the Company or the Subsidiaries.

(s) Each of the Company and the Subsidiaries has filed all necessary federal, state and foreign tax returns or has requested and have received extensions thereof, except where the failure to so file such returns would not, individually or in the aggregate, have a Material Adverse Effect, and has paid all taxes shown as due thereon; and other than tax deficiencies that the Company or any Subsidiary is contesting in good faith and for which the Company or such Subsidiary has provided adequate reserves, there is no tax deficiency that has been asserted against the Company or any of the Subsidiaries that would have, individually or in the aggregate, a Material Adverse Effect.

(t) The statistical and market-related data included or incorporated by reference in the General Disclosure Package are based on or derived from sources that the Company and the Subsidiaries believe to be reliable and accurate.

(u) None of the Company, the Subsidiaries or any agent acting on their behalf has taken or will take any action that might cause this Agreement or the sale of the Offered Securities to violate Regulation T, U or X of the Board of Governors of the Federal Reserve System, in each case as in effect, or as the same may hereafter be in effect, on the Closing Date.

(v) Each of the Company and the Subsidiaries has good and marketable title to all real property and good title to all personal property described in the General Disclosure Package as being owned by it and good and marketable title to a leasehold estate in the real and personal property described in the General Disclosure Package as being leased by it free and clear of all liens, charges, encumbrances or restrictions, except as described in the General Disclosure Package or to the extent the failure to have such title or the existence of such liens, charges, encumbrances or restrictions would not, individually or in the aggregate, have a Material Adverse Effect. All leases, contracts and agreements to which the Company or any of the Subsidiaries is a party or by which

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any of them is bound are valid and enforceable against the Company or such Subsidiary, and are valid and enforceable against the other party or parties thereto and are in full force and effect with only such exceptions as would not, individually or in the aggregate, have a Material Adverse Effect. The Company and the Subsidiaries own or possess adequate licenses or other rights to use all material patents, trademarks, service marks, trade names, copyrights and know-how necessary to conduct the businesses operated by them as described in the General Disclosure Package, and none of the Company or the Subsidiaries has received any notice of infringement of or conflict with (or knows of any such infringement of or conflict with) asserted rights of others with respect to any material patents, trademarks, service marks, trade names, copyrights or know-how that, if such assertion of infringement or conflict were sustained, would have a Material Adverse Effect.

(w) There are no legal or governmental proceedings involving or affecting the Company or any Subsidiary or any of their respective properties or assets that would be required to be described in the Registration Statement or the Final Prospectus that are not so described, nor are there any material contracts or other documents that would be required to be described in or filed as exhibits to the Registration Statement or the Final Prospectus that are not so described or filed.

(x) Except as would not, individually or in the aggregate, have a Material Adverse Effect (A) each of the Company and the Subsidiaries is in compliance with, and has not received any notice of any liability under, applicable Environmental Laws (as defined below), (B) each of the Company and the Subsidiaries has made all filings and provided all notices required under any applicable Environmental Law, and has and is in compliance with all Permits required under any applicable Environmental Laws and each of them is in full force and effect, (C) there is no civil, criminal or administrative action, suit, demand, claim, hearing, notice of violation, investigation, proceeding, notice or demand letter or request for information pending or, to the knowledge of the Company or any of the Subsidiaries, threatened against the Company or any of the Subsidiaries under any Environmental Law, (D) no lien, charge, encumbrance or restriction has been recorded under any Environmental Law with respect to any assets, facility or property owned, operated, leased or controlled by the Company or any of the Subsidiaries, (E) none of the Company or the Subsidiaries has received notice that it has been identified as a potentially responsible party under the Comprehensive Environmental Response, Compensation and Liability Act of 1980, as amended (“CERCLA”), or any comparable state law and (F) no property or facility of the Company or any of the Subsidiaries is (i) listed or, to the knowledge of the Company or any of its Subsidiaries, proposed for listing on the National Priorities List under CERCLA or is (ii) listed in the Comprehensive Environmental Response, Compensation, Liability Information System List promulgated pursuant to CERCLA, or on any comparable list maintained by any state or local governmental authority.

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For purposes of this Agreement, “Environmental Laws” means the common law and all applicable federal, state and local laws or regulations, codes, orders, decrees, judgments or injunctions issued, promulgated, approved or entered thereunder, in each case relating to pollution or protection of public or employee health and safety or the environment, including, without limitation, those laws relating to (i) emissions, discharges, releases or threatened releases of hazardous materials into the environment (including, without limitation, ambient air, surface water, ground water, land surface or subsurface strata), (ii) the manufacture, processing, distribution, use, generation, treatment, storage, disposal, transport or handling of hazardous materials, and (iii) underground and above ground storage tanks and related piping, and emissions, discharges, releases or threatened releases therefrom.

(y) There is no strike, labor dispute or work stoppage with the employees of the Company or any of the Subsidiaries that is pending or, to the knowledge of the Company or any of the Subsidiaries, threatened.

(z) Each of the Company and the Subsidiaries carries insurance in such amounts and covering such risks as is adequate for the conduct of its business and the value of its properties.

(aa) None of the Company or the Subsidiaries has any material liability for any prohibited transaction or funding deficiency or any complete or partial withdrawal liability with respect to any pension, profit sharing or other plan that is subject to the Employee Retirement Income Security Act of 1974, as amended (“ERISA”), to which the Company or any of the Subsidiaries makes or ever has made a contribution and in which any employee of the Company or of any Subsidiary is or has ever been a participant. With respect to such plans, the Company and each Subsidiary is in compliance in all material respects with all applicable provisions of ERISA.

(bb) Each of the Company and the Subsidiaries (i) makes and keeps accurate books and records and (ii) maintains internal accounting controls that provide reasonable assurance that (A) transactions are executed in accordance with management’s authorization, (B) transactions are recorded as necessary to permit preparation of its financial statements and to maintain accountability for its assets, (C) access to its assets is permitted only in accordance with management’s authorization and (D) the reported accountability for its assets is compared with existing assets at reasonable intervals.

(cc) None of the Company or the Subsidiaries will be, after giving effect to the offer and sale of the Offered Securities as described in the General Disclosure Package, an “investment company,” as such term is defined in the Investment Company Act of 1940, as amended, and the rules and regulations thereunder.

(dd) The statements in the General Disclosure Package and the Final Prospectus under the headings “U.S. Federal Tax Consequences for Non-U.S. Holders,” “Description of Common Stock” and “Underwriting,” insofar as such statements

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summarize legal matters, agreements, documents or proceedings discussed therein, are accurate and fair summaries of such legal matters, agreements, documents or proceedings and present the information required to be shown.

(ee) None of the Company or the Subsidiaries has taken, nor will any of them take, directly or indirectly, any action designed to, or that might be reasonably expected to, cause or result in stabilization or manipulation of the price of the Offered Securities.

(ff) Neither the Company nor any of its Subsidiaries nor, to the best knowledge of the Company, any director, officer, agent, employee or other person associated with or acting on behalf of the Company or any of its Subsidiaries has (i) used any corporate funds for any unlawful contribution, gift, entertainment or other unlawful expense relating to political activity; (ii) made any direct or indirect unlawful payment to any foreign or domestic government official or employee from corporate funds; (iii) violated or is in violation of any provision of the Foreign Corrupt Practices Act of 1977; or (iv) made any bribe, rebate, payoff, influence payment, kickback or other unlawful payment.

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

(hh) None of the Company, any of its Subsidiaries or, to the knowledge of the Company, any director, officer, agent, employee or affiliate of the Company or any of its Subsidiaries is currently subject to any U.S. sanctions administered by the Office of Foreign Assets Control of the U.S. Department of the Treasury (“OFAC”); and the Company will not directly or indirectly use the proceeds of the offering of the Securities hereunder, or lend, contribute or otherwise make available such proceeds to any Subsidiary, joint venture partner or other person or entity, for the purpose of financing the activities of any person currently subject to any U.S. sanctions administered by OFAC.

(ii) Neither the Company nor any Subsidiary nor, to the knowledge of the Company, any of their officers, directors or affiliates (within the meaning of FINRA’s NASD Conduct Rule 2720(f)(1)) directly or indirectly controls, is controlled by, or is under common control with, or is an associated person (within the meaning of Article I, Section 1(ee) of the By-laws of FINRA) of, any member firm of FINRA.

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3. Representations of the Selling Stockholder. The Selling Stockholder represents, and agrees with, the Underwriter that:

(a) The Selling Stockholder has all requisite trust power and authority to execute, deliver and perform its obligations under this Agreement and to consummate the transactions contemplated hereby. This Agreement and the consummation by the Selling Stockholder of the transactions contemplated hereby have been duly and validly authorized by the Selling Stockholder. This Agreement has been duly and validly executed and delivered by the Selling Stockholder.

(b) No consent, approval, authorization or order of any court or governmental agency or body, or third party is required for the consummation by the Selling Stockholder of the transactions contemplated hereby, except such as have been obtained and such as may be required under state securities or “Blue Sky” laws in connection with the purchase and resale of the Offered Securities by the Underwriter.

(c) The execution, delivery and performance by the Selling Stockholder of this Agreement and the consummation of the transactions contemplated hereby (including, without limitation, the sale of the Offered Securities to the Underwriter) will not conflict with or constitute or result in a breach of or a default under (or an event that with notice or passage of time or both would constitute a default under) or violation of any of (i) the terms or provisions of any indenture, mortgage, deed of trust, loan agreement, note, lease, contract or other agreement or instrument to which the Selling Stockholder is a party or to which the Selling Stockholder or its properties or assets is subject, (ii) the declaration of trust (or similar organizational document) of the Selling Stockholder or (iii) (assuming compliance with all applicable state securities or “Blue Sky” laws) any statute, judgment, decree, order, rule or regulation applicable to the Selling Stockholder or any of its properties or assets, except in the case of clauses (i) and (iii) for such conflicts, breaches, violations or defaults as would not reasonably be expected to materially adversely affect the Selling Stockholder’s ability to perform its obligations hereunder.

(d) The Selling Stockholder has and on the Closing Date hereinafter mentioned will have valid and unencumbered title to the Securities to be delivered by the Selling Stockholder on the Closing Date; and upon payment for the Securities to be sold by the Selling Stockholder pursuant to this Agreement, delivery of such Securities, as directed by the Underwriter to Cede & Co. (“Cede”) or such other nominee as may be designated by the Depository Trust Company (“DTC”), registration of such Securities in the name of Cede or such other nominee and the crediting of such Securities on the books of DTC to securities accounts of the Underwriter (assuming that neither DTC nor the Underwriter has notice of any adverse claim (as defined in Section 8-105 of the New York Uniform Commercial Code, as amended (the “UCC”)), (1) DTC shall be a “protected purchaser” of such Securities (as defined in Section 8-302 of the UCC), (2) the Underwriter will acquire a valid security entitlement to the Securities (as defined in

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Section 8-102 of the UCC) and (3) no action based on any adverse claim (as defined in Section 8-102 of the UCC) may be asserted against the Underwriter with respect to such security entitlement.

(e) The Registration Statement, the General Disclosure Package and the Final Prospectus, (i) at the time the Registration Statement initially became effective, at the Effective Time relating to the Offered Securities and on the Closing Date, with respect to the Registration Statement, (ii) as of the Applicable Time, with respect to the General Disclosure Package, and (iii) on its date, at the time of filing the Final Prospectus pursuant to Rule 424(b) and on the Closing Date, with respect to the Final Prospectus, did not and will not contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein not misleading; provided, however, that this representation and warranty shall only apply to any statements or omissions in the Registration Statement, the General Disclosure Package and the Final Prospectus made in reliance upon and in conformity with written information furnished by or on behalf of a Selling Stockholder specifically for use in the Registration Statement, the General Disclosure Package or the Final Prospectus, together with any amendment or supplement thereto used by the Company or the Underwriter, as the case may be, it being understood that the only such information furnished by any Selling Stockholder consists of the information relating to such Selling Stockholder in the Registration Statement, the General Disclosure Package and the Final Prospectus under the heading “Selling Stockholder,” including, with respect to each Selling Stockholder, the second, third, fourth and fifth paragraphs thereunder in the Statutory Prospectus and the Final Prospectus (the “Selling Stockholder Information”).

(f) The Selling Stockholder has not distributed and will not distribute any prospectus or other offering material in connection with the offering and sale of the Offered Securities other than the General Disclosure Package and the Final Prospectus.

(g) (i) The Selling Stockholder has reviewed the Registration Statement, the General Disclosure Package and the Final Prospectus and the representations and warranties of the Company contained in Section 2 of this Agreement and has no reason to believe that such representations and warranties are not true and correct, and (ii) the sale of the Offered Securities by the Selling Stockholder is not prompted by any information concerning the Company or any of the Subsidiaries that is not set forth in the General Disclosure Package, the Final Prospectus or any supplement thereto.

(h) There are no material agreements or arrangements relating to the Company or the Subsidiaries to which the Selling Stockholder is a party, that would be required to be described in or filed as exhibits to the Registration Statement or the Final Prospectus that are not so described or filed.

(i) Except as disclosed in the General Disclosure Package, and the Final Prospectus, there are no contracts, agreements or understandings between the

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Selling Stockholder and any person that would give rise to a valid claim against the Company or the Underwriter for a brokerage commission, finder’s fee or other like payment in connection with the sale of the Offered Securities.

(j) The Selling Stockholder has not taken, nor will it take, directly or indirectly, any action designed to, or that might be reasonably expected to, cause or result in stabilization or manipulation of the price of the Offered Securities.

(k) On or prior to the date hereof, the Selling Stockholder has executed and delivered to the Underwriter an agreement substantially in the form set forth in Annex A hereto.

4. Purchase, Sale and Delivery of Offered Securities. On the basis of the representations, warranties and agreements and subject to the terms and conditions set forth herein, the Selling Stockholder agrees to sell to the Underwriter and the Underwriter agrees to purchase from the Selling Stockholder, at a purchase price of $19.15875 per share, 4,500,000 shares of Offered Securities.

The Selling Stockholder agrees to deliver the Offered Securities to or as instructed by the Underwriter in a form reasonably acceptable to the Underwriter against payment of the purchase price by the Underwriter in Federal (same day) funds by wire transfer to an account at a bank acceptable to the Underwriter drawn to the order of the Selling Stockholder at the office of Latham & Watkins LLP, Los Angeles, California, 90071, at 10:00 am (New York City Time) on November 30, 2010, or at such other time not later than seven full business days thereafter as the Underwriter and the Selling Stockholder determine, such time being herein referred to as the “Closing Date”. For purposes of Rule 15c6-1 under the Exchange Act, the Closing Date (if later than the otherwise applicable settlement date) shall be the settlement date for payment of funds and delivery of securities for all the Offered Securities sold pursuant to the offering. The Offered Securities so to be delivered will be made available for checking at the above office of Latham & Watkins LLP at least 24 hours prior to the Closing Date.

5. Offering by Underwriter. It is understood that the Underwriter proposes to offer the Offered Securities for sale to the public as set forth in the Final Prospectus.

6. Certain Agreements of the Company and the Selling Stockholder.

(a) The Company agrees with the Underwriter that:

(i) The Company has filed or will file each Statutory Prospectus (including the Final Prospectus) pursuant to and in accordance with Rule 424(b)(1) (or, if applicable and consented to by the Underwriter, subparagraph (3) or subparagraph (4)) not later than the second business day following the earlier of the date it is first used or the execution and delivery of this Agreement. The Company will advise

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the Underwriter promptly of any such filing pursuant to Rule 424(b) and provide satisfactory evidence to the Underwriter of such timely filing. The Company has complied and will comply with Rule 433.

(ii) The Company will promptly advise the Underwriter of any proposal to amend or supplement the Registration Statement or any Statutory Prospectus at any time and will offer the Underwriter a reasonable opportunity to comment on any such amendment or supplement; and the Company will also advise the Underwriter promptly of (i) the filing of any such amendment or supplement, (ii) any request by the Commission or its staff for any amendment to the Registration Statement, for any supplement to any Statutory Prospectus or for any additional information, (iii) the institution by the Commission of any stop order proceedings in respect of the Registration Statement or the threatening of any proceeding for that purpose, and (iv) the receipt by the Company of any notification with respect to the suspension of the qualification of the Offered Securities in any jurisdiction or the institution or threatening of any proceedings for such purpose. The Company will use its best efforts to prevent the issuance of any such stop order or the suspension of any such qualification and, if issued, to obtain as soon as possible the withdrawal thereof.

(iii) If, at any time when a prospectus relating to the Offered Securities is (or but for the exemption in Rule 172 would be) required to be delivered under the Act by the Underwriter or dealer, any event occurs as a result of which the Final Prospectus as then amended or supplemented would include an untrue statement of a material fact or omit to state any material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading, or if it is necessary at any time to amend the Registration Statement or supplement the Final Prospectus to comply with the Act, the Company will promptly notify the Underwriter of such event and will promptly prepare and file with the Commission and furnish, at its own expense, to the Underwriter and the dealers and any other dealers upon request of the Underwriter, an amendment or supplement which will correct such statement or omission or an amendment which will effect such compliance. Neither Underwriter’s consent to, nor the Underwriter’s delivery of, any such amendment or supplement shall constitute a waiver of any of the conditions set forth in Section 8 hereof.

(iv) As soon as practicable, but not later than 16 months, after the date of this Agreement, the Company will make generally available to its securityholders an earnings statement covering a period of at least 12 months beginning after the date of this Agreement and satisfying the provisions of Section 11(a) of the Act and Rule 158.

(v) The Company will furnish to the Underwriter copies of the Registration Statement, including all exhibits, any Statutory Prospectus, the Final

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Prospectus and all amendments and supplements to such documents, in each case as soon as available and in such quantities as the Underwriter reasonably request. The Final Prospectus shall be so furnished on or prior to 5:00 pm (New York City time) on the business day following the execution and delivery of this Agreement. The Company will pay the expenses of printing and distributing to the Underwriter all such documents.

(vi) The Company will arrange for the qualification of the Offered Securities for sale under the laws of such jurisdictions as the Underwriter designates and will continue such qualifications in effect so long as required for the distribution.

(vii) During the period of five years hereafter, the Company will furnish to the Underwriter as soon as practicable after the end of each fiscal year, a copy of its annual report to stockholders for such year; and the Company will furnish to the Underwriter (i) as soon as available, a copy of each report and any definitive proxy statement of the Company filed with the Commission under the Exchange Act or mailed to stockholders, and (ii) from time to time, such other information concerning the Company as the Underwriter may reasonably request. However, so long as the Company is subject to the reporting requirements of either Section 13 or Section 15(d) of the Exchange Act and is timely filing reports with the Commission on its Electronic Data Gathering, Analysis and Retrieval system (“EDGAR”), it is not required to furnish such reports or statements to the Underwriter.

(viii) The Company will pay all expenses incident to the performance of its obligations under this Agreement, including but not limited to any filing fees and other expenses incurred in connection with qualification of the Offered Securities for sale under the laws of such jurisdictions as the Underwriter designates and the preparation and printing of memoranda relating thereto, costs and expenses related to the review by the Financial Industry Regulatory Authority, Inc. (“FINRA”) of the Offered Securities, if any (including filing fees and the fees and expenses of counsel for the Underwriter relating to such review), costs and expenses relating to investor presentations or any “road show” in connection with the offering and sale of the Offered Securities, any fees and expenses incident to listing the Offered Securities on the New York Stock Exchange and other national or foreign exchanges, fees and expenses in connection with the registration of the Offered Securities under the Exchange Act, expenses incurred in distributing preliminary prospectuses and the Final Prospectus (including any amendments and supplements thereto) to the Underwriter, and expenses incurred for preparing, printing and distributing any Issuer Free Writing Prospectuses to investors or prospective investors.

(ix) None of the Company or the Subsidiaries will take, directly or indirectly, any action designed to or that would constitute or that might reasonably be expected to cause or result in, stabilization or manipulation of the price of any securities of the Company to facilitate the sale or resale of the Offered Securities.

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(x) For the period specified below (the “Lock-Up Period”), the Company will not, directly or indirectly, take any of the following actions with respect to its Securities or any securities convertible into or exchangeable or exercisable for any of its Securities (“Lock-Up Securities”): (i) offer, sell, issue, contract to sell, pledge or otherwise dispose of Lock-Up Securities, (ii) offer, sell, issue, contract to sell, contract to purchase or grant any option, right or warrant to purchase Lock-Up Securities, (iii) enter into any swap, hedge or any other agreement that transfers, in whole or in part, the economic consequences of ownership of Lock-Up Securities, (iv) establish or increase a put equivalent position or liquidate or decrease a call equivalent position in Lock-Up Securities within the meaning of Section 16 of the Exchange Act or (v) file with the Commission a registration statement under the Act relating to Lock-Up Securities, or publicly disclose the intention to take any such action, without the prior written consent of the Underwriter, except (a) grants of employee stock options, restricted stock units or other equity-based awards pursuant to the terms of a plan described in the General Disclosure Package in effect on the date hereof or (b) issuances of Lock-Up Securities pursuant to the exercise of such options, restricted stock units or equity-based awards. The initial Lock-Up Period will commence on the date hereof and continue for 60 days after the date hereof or such earlier date that the Underwriter consents to in writing.

(b) The Selling Stockholder agrees with the Underwriter that:

(i) The Selling Stockholder agrees with the Underwriter that if, at any time when a prospectus relating to the Offered Securities is (or but for the exemption in Rule 172 would be) required to be delivered under the Act by any Underwriter or dealer, any event occurs as a result of which the General Disclosure Package or the Final Prospectus as then amended or supplemented would include an untrue statement of a material fact or omit to state any material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading, to the extent that any such statements or omissions made in the General Disclosure Package or the Final Prospectus are made in reliance upon and in conformity with the Selling Stockholder Information, the Selling Stockholder will promptly notify the Underwriter of such event.

(ii) The Selling Stockholder will not take, directly or indirectly, any action designed to or that would constitute or that might reasonably be expected to cause or result in, stabilization or manipulation of the price of any securities of the Company to facilitate the sale or resale of the Offered Securities.

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7. Free Writing Prospectuses. The Company represents and agrees that, unless it obtains the prior consent of the Underwriter, and the Underwriter represents and agrees that, unless it obtains the prior consent of the Company and the Underwriter, it has not made and will not make any offer relating to the Offered Securities that would constitute an Issuer Free Writing Prospectus, or that would otherwise constitute a “free writing prospectus,” as defined in Rule 405, required to be filed with the Commission. Any such free writing prospectus consented to by the Company and the Underwriter is hereinafter referred to as a “Permitted Free Writing Prospectus.” The Company represents that it has treated and agrees that it will treat each Permitted Free Writing Prospectus as an “issuer free writing prospectus,” as defined in Rule 433, and has complied and will comply with the requirements of Rules 164 and 433 applicable to any Permitted Free Writing Prospectus, including timely Commission filing where required, legending and record keeping.

8. Conditions of the Obligations of the Underwriter. The obligations of the Underwriter to purchase and pay for the Offered Securities on the Closing Date will be subject to the accuracy of the representations and warranties of the Company and the Selling Stockholder herein (as though made on the Closing Date), to the accuracy of the statements of Company officers and the Selling Stockholder made pursuant to the provisions hereof, to the performance by the Company and the Selling Stockholder of their obligations hereunder and to the following additional conditions precedent:

(a) The Underwriter shall have received letters, dated, respectively, the date hereof and the Closing Date, from Deloitte & Touche LLP, independent public accountants, in form and substance reasonably satisfactory to the Underwriter, containing statements and information of the type ordinarily included in accountants’ “comfort letters” to underwriters with respect to the financial statements and certain financial information contained in the Registration Statement, the General Disclosure Package and the Final Prospectus; provided that, in any letter delivered on the Closing Date, such letter shall use a “cut-off date” no earlier than three days prior to the Closing Date.

(b) The Final Prospectus shall have been filed with the Commission in accordance with the Rules and Regulations and Section 6(a)(i) hereof. No stop order suspending the effectiveness of the Registration Statement or of any part thereof shall have been issued and no proceedings for that purpose shall have been instituted or, to the knowledge of the Company or any Underwriter, shall be contemplated by the Commission.

(c) Subsequent to the execution and delivery of this Agreement, there shall not have occurred (i) any change, or any development or event involving a prospective change, in the condition (financial or otherwise), results of operations, business, properties or prospects of the Company and the Subsidiaries taken as a whole

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which, in the judgment of the Underwriter, is material and adverse and makes it impractical or inadvisable to market the Offered Securities; (ii) any downgrading in the rating of any indebtedness of the Company by any “nationally recognized statistical rating organization” (as defined for purposes of Rule 436(g)), or any public announcement that any such organization has under surveillance or review its rating of any indebtedness of the Company (other than an announcement with positive implications of a possible upgrading, and no implication of a possible downgrading, of such rating); (iii) any change in either U.S. or international financial, political or economic conditions or currency exchange rates or exchange controls the effect of which is such as to make it, in the judgment of the Underwriter, impractical to market or to enforce contracts for the sale of the Offered Securities, whether in the primary market or in respect of dealings in the secondary market; (iv) any suspension or material limitation of trading in securities generally on the New York Stock Exchange or any setting of minimum or maximum prices for trading on such exchange; (v) or any suspension of trading of any securities of the Company on any exchange or in the over-the-counter market; (vi) any banking moratorium declared by any U.S. federal or New York authorities; (vii) any major disruption of settlements of securities, payment, or clearance services in the United States or any other country where such securities are listed or (viii) any attack on, outbreak or escalation of hostilities or act of terrorism involving the United States, any declaration of war by Congress or any other national or international calamity or emergency if, in the judgment of the Underwriter, the effect of any such attack, outbreak, escalation, act, declaration, calamity or emergency is such as to make it impractical or inadvisable to market the Offered Securities or to enforce contracts for the sale of the Offered Securities.

(d) The Underwriter shall have received an opinion, dated the Closing Date, of Kirkland & Ellis LLP and Hinckley, Allen & Snyder LLP, each counsel for the Company, in form and substance reasonably satisfactory to the Underwriter, a form of which is attached hereto as Exhibit A and Exhibit B, respectively.

(e) The Underwriter shall have received an opinion, dated the Closing Date, of Kirkland & Ellis LLP, counsel for the Selling Stockholder, in form and substance reasonably satisfactory to the Underwriter, a form of which is attached hereto as Exhibit C.

(f) The Underwriter shall have received from Latham & Watkins LLP, counsel for the Underwriter, such opinion or opinions, dated the Closing Date, with respect to such matters as the Underwriter may require, and the Company shall have furnished to such counsel such documents as they request for the purpose of enabling them to pass upon such matters.

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(g) The Underwriter shall have received a certificate, dated the Closing Date, of an executive officer of the Company and a principal financial or accounting officer of the Company in which such officers shall state that: the representations and warranties of the Company in this Agreement are true and correct; the Company has complied with all agreements and satisfied all conditions on its part to be performed or satisfied hereunder at or prior to the Closing Date; no stop order suspending the effectiveness of the Registration Statement has been issued and no proceedings for that purpose have been instituted or, to the best of their knowledge and after reasonable investigation, are contemplated by the Commission; and, subsequent to the date of the most recent financial statements in the General Disclosure Package, there has been no material adverse change, nor any development or event involving a prospective material adverse change, in the condition (financial or otherwise), results of operations, business, properties or prospects of the Company and the Subsidiaries taken as a whole except as set forth in the General Disclosure Package or as described in such certificate.

(h) The Underwriter shall have received a certificate, dated the Closing Date, of an authorized person on behalf of the Selling Stockholder in which such person shall state that the representations and warranties of the Selling Stockholder in this Agreement are true and correct and the Selling Stockholder has complied with all agreements and satisfied all conditions on its part to be performed or satisfied hereunder at or prior to the Closing Date.

(i) An executed copy of an agreement substantially in the form set forth in Annex A hereto from the Selling Stockholder shall have been delivered to the Underwriter and shall be in full force and effect on the Closing Date.

The Company will furnish the Underwriter with such conformed copies of such opinions, certificates, letters and documents as the Underwriter reasonably requests. The Underwriter may in its sole discretion waive compliance with any conditions to the obligations of the Underwriter hereunder.

9. Indemnification and Contribution.

(a) (i) The Company will indemnify and hold harmless the Underwriter, its partners, members, directors, officers, employees, agents, affiliates and each person, if any, who controls the Underwriter within the meaning of Section 15 of the Act or Section 20 of the Exchange Act (each, an “Indemnified Party”), against any and all losses, claims, damages or liabilities, joint or several, to which such Indemnified Party may become subject, under the Act, the Exchange Act, other Federal or state statutory law or regulation or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon any untrue statement or alleged untrue statement of any material fact contained in any part of the Registration Statement at any

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time, any Statutory Prospectus as of any time, the Final Prospectus or any Issuer Free Writing Prospectus, or arise out of or are based upon the omission or alleged omission of a material fact required to be stated therein or necessary to make the statements therein not misleading, and will reimburse each Indemnified Party for any legal or other expenses reasonably incurred by such Indemnified Party in connection with investigating or defending against any loss, claim, damage, liability, action, litigation, investigation or proceeding whatsoever (whether or not such Indemnified Party is a party thereto), whether threatened or commenced, and in connection with the enforcement of this provision with respect to any of the above as such expenses are incurred; provided, however, that the Company will not be liable in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon an untrue statement or alleged untrue statement in or omission or alleged omission from any of such documents in reliance upon and in conformity with written information furnished to the Company by the Underwriter specifically for use therein, it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in subsection (b) below.

(ii) The Selling Stockholder will indemnify and hold harmless each Indemnified Party, against any and all losses, claims, damages or liabilities, joint or several, to which such Indemnified Party may become subject, under the Act, the Exchange Act, other Federal or state statutory law or regulation or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon any untrue statement or alleged untrue statement of any material fact contained in any part of the Registration Statement at any time, any Statutory Prospectus as of any time, the Final Prospectus or any Issuer Free Writing Prospectus, in each case as they related to the Selling Stockholder, or arise out of or are based upon the omission or alleged omission of a material fact required to be stated therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in the Registration Statement, any Statutory Prospectus, the Final Prospectus or any Issuer Free Writing Prospectus in reliance upon and in conformity with the Selling Stockholder Information of the Selling Stockholder, and will reimburse each Indemnified Party for any legal or other expenses reasonably incurred by such Indemnified Party in connection with investigating or defending against any loss, claim, damage, liability, action, litigation, investigation or proceeding whatsoever (whether or not such Indemnified Party is a party thereto), whether threatened or commenced, and in connection with the enforcement of this provision with respect to any of the above as such expenses are incurred; provided, however, that the Selling Stockholder will not be liable in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon an untrue statement or alleged untrue statement in or omission or alleged omission from any of such documents in reliance upon and in conformity with the written information furnished to the Company by the Underwriter specifically for use

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therein; provided, further, that the liability of the Selling Stockholder under this subsection shall not exceed the aggregate net proceeds (after underwriting commissions and discounts, but without deducting expenses) received by the Selling Stockholder from the sale of Securities sold by the Selling Stockholder hereunder (the “Selling Stockholder Net Proceeds”).

(b) The Underwriter will indemnify and hold harmless the Company, each of its directors and each of its officers who signs a Registration Statement and each person, if any, who controls the Company within the meaning of Section 15 of the Act or Section 20 of the Exchange Act, and the Selling Stockholder (each, an “Underwriter Indemnified Party”), against any losses, claims, damages or liabilities to which such Underwriter Indemnified Party may become subject, under the Act, the Exchange Act, other Federal or state statutory law or regulation or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon any untrue statement or alleged untrue statement of any material fact contained in any part of the Registration Statement at any time, any Statutory Prospectus as of any time, the Final Prospectus, or any Issuer Free Writing Prospectus, or arise out of or are based upon the omission or the alleged omission of a material fact required to be stated therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in reliance upon and in conformity with written information furnished to the Company by the Underwriter specifically for use therein, and will reimburse any legal or other expenses reasonably incurred by such Underwriter Indemnified Party in connection with investigating or defending against any such loss, claim, damage, liability, action, litigation, investigation or proceeding whatsoever (whether or not such Underwriter Indemnified Party is a party thereto), whether threatened or commenced, based upon any such untrue statement or omission, or any such alleged untrue statement or omission as such expenses are incurred, it being understood and agreed that the only such information furnished by the Underwriter consists of the following information in the Final Prospectus: the information contained in the first sentence of the third paragraph under the caption “Underwriting”.

(c) Promptly after receipt by an indemnified party under this Section of notice of the commencement of any action, such indemnified party will, if a claim in respect thereof is to be made against the indemnifying party under subsection (a) or (b) above, notify the indemnifying party of the commencement thereof; but the failure to notify the indemnifying party shall not relieve it from any liability that it may have under subsection (a) or (b) above except to the extent that it has been materially prejudiced (through the forfeiture of substantive rights or defenses) by such failure; and provided further that the failure to notify the indemnifying party shall not relieve it from any liability that it may have to an indemnified party otherwise than under subsection (a) or (b) above. In case any such action is brought against any indemnified party and it

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notifies the indemnifying party of the commencement thereof, the indemnifying party will be entitled to participate therein and, to the extent that it may wish, jointly with any other indemnifying party similarly notified, to assume the defense thereof, with counsel satisfactory to such indemnified party (who shall not, except with the consent of the indemnified party, be counsel to the indemnifying party), and after notice from the indemnifying party to such indemnified party of its election so to assume the defense thereof, the indemnifying party will not be liable to such indemnified party under this Section for any legal or other expenses subsequently incurred by such indemnified party in connection with the defense thereof other than reasonable costs of investigation. No indemnifying party shall, without the prior written consent of the indemnified party, effect any settlement of any pending or threatened action 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 (i) includes an unconditional release of such indemnified party from all liability on any claims that are the subject matter of such action and (ii) does not include a statement as to, or an admission of, fault, culpability or a failure to act by or on behalf of an indemnified party.

(d) If the indemnification provided for in this Section is unavailable or insufficient to hold harmless an indemnified party under subsection (a) or (b) above, then each indemnifying party shall contribute to the amount paid or payable by such indemnified party as a result of the losses, claims, damages or liabilities referred to in subsection (a) or (b) above (i) in such proportion as is appropriate to reflect the relative benefits received by the Company and the Selling Stockholder on the one hand and the Underwriter on the other from the offering of the Offered Securities or (ii) if the allocation provided by clause (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 (i) above but also the relative fault of the Company and the Selling Stockholder on the one hand and the Underwriter on the other in connection with the statements or omissions which resulted in such losses, claims, damages or liabilities as well as any other relevant equitable considerations. The relative benefits received by the Company and the Selling Stockholder on the one hand and the Underwriter on the other shall be deemed to be in the same proportion as the total net proceeds from the offering (before deducting expenses) received by the Selling Stockholder bear to the total underwriting discounts and commissions received by the Underwriter. The relative fault shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Company, the Selling Stockholder or the Underwriter and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such untrue statement or omission. The amount paid by an indemnified party as a result of the losses, claims, damages or liabilities referred to in the first sentence of this subsection (d) shall be deemed to include any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any action or

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claim which is the subject of this subsection (d). Notwithstanding the provisions of this subsection (d), (i) the Underwriter shall not be required to contribute any amount in excess of the amount by which the total price at which the Securities underwritten by it and distributed to the public were offered to the public exceeds the amount of any damages which such Underwriter has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission and (ii) the Selling Stockholder shall not be required to contribute any amount in excess of the Selling Stockholder Net Proceeds received by the Selling Stockholder. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The Company, the Selling Stockholder and the Underwriter agree that it would not be just and equitable if contribution pursuant to this Section 9(d) were determined by pro rata allocation or by any other method of allocation which does not take account of the equitable considerations referred to in this Section 9(d).

10. The respective indemnities, agreements, representations, warranties and other statements of the Company or its officers, of the Selling Stockholder and of the Underwriter set forth in or made pursuant to this Agreement will remain in full force and effect, regardless of any investigation, or statement as to the results thereof, made by or on behalf of any Underwriter, the Selling Stockholder, the Company or any of their respective representatives, officers or directors or any controlling person, and will survive delivery of and payment for the Offered Securities. If the purchase of the Offered Securities by the Underwriter is not consummated for any reason, the Company will reimburse the Underwriter for all out-of-pocket expenses (including fees and disbursements of counsel) reasonably incurred by them in connection with the offering of the Offered Securities, and the respective obligations of the Company and the Underwriter pursuant to Section 9 hereof shall remain in effect. In addition, if any Offered Securities have been purchased hereunder, the representations and warranties in Section 2 and all obligations under Section 6 shall also remain in effect.

11. Notices. All communications hereunder will be in writing and, if sent to the Underwriter, will be mailed, delivered or telegraphed and confirmed to it at Credit Suisse Securities (USA) LLC, Eleven Madison Avenue, New York, N.Y. 10010-3629, Attention: LCD-IBD, or, if sent to the Company, will be mailed, delivered or telegraphed and confirmed to it at Tutor Perini Corporation, 15901 Olden Street, Sylmar, California 91342, Attention: Chief Financial Officer; with a copy to Kirkland & Ellis LLP, 601 Lexington Avenue, New York, New York 10022, Attention: Christian O. Nagler., Esq., or, if sent to the Selling Stockholder, will be mailed, delivered or telegraphed and confirmed to it c/o Tutor Perini Corporation, 15901 Olden Street, Sylmar, California 91342, Attention: Chief Executive Officer; with a copy to Kirkland & Ellis LLP, 601 Lexington Avenue, New York, New York 10022, Attention: Christian O. Nagler., Esq.

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12. Successors. This Agreement will inure to the benefit of and be binding upon the parties hereto and their respective successors and the officers and directors and controlling persons referred to in Section 9, and no other person will have any right or obligation hereunder.

13. Counterparts. This Agreement may be executed in any number of counterparts, each of which shall be deemed to be an original, but all such counterparts shall together constitute one and the same Agreement.

14. Absence of Fiduciary Relationship. The Company and the Selling Stockholder acknowledge and agrees that:

(a) The Underwriter has been retained solely to act as underwriter in connection with the sale of Offered Securities and that (i) no fiduciary, advisory or agency relationship between the Company and the Underwriter has been created in respect of any of the transactions contemplated by this Agreement or the Final Prospectus, irrespective of whether the Underwriter advised or is advising the Company on other matters, and (ii) no fiduciary, advisory or agency relationship between the Selling Stockholder and the Underwriter has been created in respect of any of the transactions contemplated by this Agreement or the Final Prospectus, irrespective of whether the Underwriter advised or is advising the Selling Stockholder on other matters;

(b) The price of the Offered Securities set forth in this Agreement was established by the Selling Stockholder following discussions and arms-length negotiations with the Underwriter and the Selling Stockholder is capable of evaluating and understanding and understands and accepts the terms, risks and conditions of the transactions contemplated by this Agreement;

(c) The Company and the Selling Stockholder have been advised that the Underwriter and its affiliates are engaged in a broad range of transactions which may involve interests that differ from those of the Company or the Selling Stockholder and that the Underwriter has no obligation to disclose such interests and transactions to the Company of the Selling Stockholder by virtue of any fiduciary, advisory or agency relationship; and

(d) Each of the Company and the Selling Stockholder waives, to the fullest extent permitted by law, any claims it may have against the Underwriter for breach of fiduciary duty or alleged breach of fiduciary duty and agrees that the Underwriter shall have no liability (whether direct or indirect) to the Company or the Selling Stockholder in respect of such a fiduciary duty claim or to any person asserting a fiduciary duty claim on behalf of or in right of the Company or the Selling Stockholder, including stockholders, employees or creditors of the Company.

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

Each of the Company and the Selling Stockholder hereby submits to the non-exclusive jurisdiction of the Federal and state courts in the Borough of Manhattan in The City of New York in any suit or proceeding arising out of or relating to this Agreement or the transactions contemplated hereby. Each of the Company and the Selling Stockholder irrevocably and unconditionally waives any objection to the laying of venue of any suit or proceeding arising out of or relating to this Agreement or the transactions contemplated hereby in Federal and state courts in the Borough of Manhattan in The City of New York and irrevocably and unconditionally waives and agrees not to plead or claim in any such court that any such suit or proceeding in any such court has been brought in an inconvenient forum.

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Execution Version

If the foregoing is in accordance with the Underwriter’s understanding of our agreement, kindly sign and return to the Company one of the counterparts hereof, whereupon it will become a binding agreement among the Company, the Selling Stockholder and the Underwriter in accordance with its terms.

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Execution Version

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