TriMas Corporation Common Stock, par value $0.01 per share Underwriting Agreement

Common Stock, par value $0.01 per share

August 13, 2012

Deutsche Bank Securities Inc.

00 Xxxx Xxxxxx, 0xx Xxxxx

Xxx Xxxx, XX 00000

Ladies and Gentlemen:

The stockholder of TriMas Corporation, a Delaware corporation (the “Company”) named in Schedule III hereto (the “Selling Stockholder”) proposes, subject to the terms and conditions stated herein, to sell to Deutsche Bank Securities Inc. (the “Underwriter”) an aggregate of 1,500,000 shares (the “Shares”) of Common Stock, par value $0.01 per share (“Stock”), of the Company.

1. The Company represents and warrants to, and agrees with, the Underwriter that:

(a) A registration statement on Form S-3 (File No. 333-172525) (the “Initial Registration Statement”) in respect of the Shares has been filed with the Securities and Exchange Commission (the “Commission”); the Initial Registration Statement and any post-effective amendment thereto, each in the form heretofore delivered to you, and, excluding exhibits thereto but including all documents incorporated by reference in the prospectus contained therein, have been declared effective by the Commission in such form; other than a registration statement, if any, increasing the size of the offering (a “Rule 462(b) Registration Statement”), filed pursuant to Rule 462(b) under the Securities Act of 1933, as amended (the “Act”), which became effective upon filing, no other document with respect to the Initial Registration Statement or document incorporated by reference therein has heretofore been filed with the Commission; and no stop order suspending the effectiveness of the Initial Registration Statement, any post-effective amendment thereto or the Rule 462(b) Registration Statement, if any, has been issued and no proceeding for that purpose has been initiated or, to the knowledge of the Company after due inquiry, threatened by the Commission (any preliminary prospectus included in the Initial Registration Statement or filed with the Commission pursuant to Rule 424(a) of the rules and regulations of the Commission under the Act is hereinafter called a “Preliminary Prospectus”; the various parts of the Initial Registration Statement and the Rule 462(b) Registration Statement, if any, including all exhibits thereto and (i) including the information contained in the form of final prospectus filed with the Commission pursuant to Rule 424(b) under the Act in accordance with Section 6(a) hereof and deemed by virtue of Rule 430B or Rule 430C under the Act to be part of the Initial Registration Statement at the time it was declared effective and (ii) the documents incorporated by reference in the prospectus contained in the Initial Registration Statement at the time such part of the Initial Registration Statement became effective, each as amended at the time such part of the Initial Registration Statement became effective or such part of the Rule 462(b) Registration Statement, if any, became or hereafter becomes effective, are hereinafter collectively called the “Registration Statement”; the Preliminary Prospectus relating to the Shares that was included in the Registration Statement immediately prior to the

Applicable Time (as defined in Section 1(c) hereof), and along with the pricing information included on Schedule I, is hereinafter called the “Pricing Prospectus”; such final prospectus, in the form first filed pursuant to Rule 424(b) under the Act is hereinafter called the “Prospectus”; any reference herein to any Preliminary Prospectus or Prospectus shall be deemed to refer to and include the documents incorporated by reference therein pursuant to Item 12 of Form S-3 under the Act, as of the date of such Preliminary Prospectus or Prospectus, as the case may be; any reference to any amendment or supplement to any Preliminary Prospectus or the Prospectus shall be deemed to refer to and include any documents filed after the date of such Preliminary Prospectus or Prospectus, as the case may be, under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and incorporated by reference in such Preliminary Prospectus or Prospectus, as the case may be; and any “issuer free writing prospectus” as defined in Rule 433 under the Act relating to the Shares is hereinafter called an “Issuer Free Writing Prospectus”);

(b) No order preventing or suspending the use of any Preliminary Prospectus or any Issuer Free Writing Prospectus has been issued by the Commission, and each Preliminary Prospectus, at the time of filing thereof, conformed in all material respects to the requirements of the Act and the rules and regulations of the Commission thereunder, and did not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with information furnished in writing to the Company by the Underwriter expressly for use therein, it being understood and agreed that the only such information is that described in Section 10(c) hereof;

(c) For the purposes of this Agreement, the “Applicable Time” is 4:20 p.m. (Eastern time) on the date of this Agreement. The Pricing Prospectus, as of the Applicable Time, did not include any untrue statement of a material fact or omit 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; and each Issuer Free Writing Prospectus listed on Schedule II hereto does not conflict with the information contained in the Registration Statement, the Pricing Prospectus or the Prospectus and each such Issuer Free Writing Prospectus, as supplemented by and taken together with the Pricing Prospectus as of the Applicable Time, did not include any untrue statement of a material fact or omit 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; provided, however, that this representation and warranty shall not apply to statements or omissions made in the Pricing Prospectus or an Issuer Free Writing Prospectus in reliance upon and in conformity with information furnished in writing to the Company by the Underwriter expressly for use therein, it being understood and agreed that the only such information is that described in Section 10(c) hereof;

(d) The documents incorporated by reference in the Pricing Prospectus and Prospectus, when they became effective or were filed with the Commission, as the case may be, conformed in all material respects to the requirements of the Act or the Exchange Act , as applicable, and the rules and regulations of the Commission thereunder, and none of such documents contained an untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary to make the statements therein not misleading; and any further documents so filed and incorporated by reference in the Prospectus or any further amendment or supplement thereto, when such documents become effective or are filed with the Commission, as the case may be, will conform in all material respects to the requirements of the Act or the Exchange Act, as applicable, and the rules and regulations of the Commission thereunder and will not contain an untrue statement

of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with information furnished in writing to the Company by the Underwriter expressly for use therein, it being understood and agreed that the only such information is that described in Section 10(c) hereof;

(e) The Registration Statement, (A) at the time it initially became effective, (B) at the time of each amendment thereto for 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 time of the first contract of sale for the Stock and (D) at the Time of Delivery (as defined in Section 5(a) below), conformed and will conform, and the Prospectus, (A) on its date, (B) at the time of filing the Prospectus pursuant to Rule 424(b) and (C) at the Time of Delivery, and any further amendments or supplements to the Registration Statement or the Prospectus will conform, in all material respects to the requirements of the Act and the rules and regulations of the Commission thereunder and do not and will not, as of the applicable effective date as to each part of the Registration Statement and as of the applicable filing date as to the Prospectus and any amendment or supplement thereto, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with information furnished in writing to the Company by the Underwriter expressly for use therein, it being understood and agreed that the only such information is that described in Section 10(c) hereof;

(f) Neither the Company nor any of its subsidiaries has sustained since the date of the latest audited financial statements included or incorporated by reference in the Pricing Prospectus any material loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree, otherwise than as set forth or contemplated in the Pricing Prospectus; and, since the respective dates as of which information is given in the Registration Statement and the Pricing Prospectus, there has not been any change in the capital stock or long-term debt of the Company or any of its subsidiaries or any material adverse change, or any development involving a prospective material adverse change, in or affecting the general affairs, management, financial position, stockholders’ equity or results of operations of the Company and its subsidiaries, taken as a whole, otherwise than as set forth or contemplated in the Pricing Prospectus; and the schedules incorporated by reference in the Registration Statement present fairly the information required to be stated therein;

(g) The Company and its subsidiaries have good and valid title in fee simple to all real property and good and valid title to all personal property owned by them, in each case free and clear of all liens, encumbrances and defects except such as are described in the Pricing Prospectus or such other liens, encumbrances and defects as would not have a material adverse affect on the current or future consolidated financial position, stockholders’ equity or results of operations of the Company and its subsidiaries taken as a whole (a “Material Adverse Effect”); 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 described in the Pricing Prospectus or as would not have a Material Adverse Effect;

(h) The Company has been duly incorporated and is validly existing as a corporation in good standing under the laws of the State of Delaware, with power and authority (corporate and other) to own its properties and conduct its business as described in the Pricing Prospectus, and has

been duly qualified as a foreign corporation for the transaction of business and is in good standing under the laws of each other jurisdiction in which it owns or leases properties or conducts any business so as to require such qualification except to the extent that the failure to be so qualified in any such jurisdiction would not, individually or in the aggregate, have a Material Adverse Effect; and each subsidiary of the Company has been duly organized, is validly existing and is in good standing (to the extent such concept is applicable) under the laws of its jurisdiction of incorporation or formation, as applicable;

(i) The Company has an authorized capitalization as set forth in the Pricing Prospectus and all of the issued shares of capital stock of the Company have been duly and validly authorized and issued and are fully paid and non-assessable and conform, or will conform, to the description of the Stock contained in the Pricing Prospectus and Prospectus; and 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 (except for directors’ qualifying shares) are owned directly or indirectly by the Company, free and clear of all liens, encumbrances, equities or claims, except for such liens or encumbrances as described in the Pricing Prospectus;

(j) The financial statements included or incorporated by reference in the Pricing Prospectus present fairly the financial position of the Company and its consolidated subsidiaries as of the dates shown and their results of operations and cash flows for the periods shown, and except as otherwise disclosed in the Pricing Prospectus or any documents incorporated by reference therein, such financial statements have been prepared in conformity with the generally accepted accounting principles in the United States applied on a consistent basis.

(k) The compliance by the Company with this Agreement and the consummation of the transactions herein contemplated (i) will not result in a breach or violation of any of the terms or provisions of, or constitute a default under, any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which the Company or any of its subsidiaries is a party or by which the Company or any of its subsidiaries is bound or to which any of the property or assets of the Company or any of its subsidiaries is subject, (ii) nor will such action result in any violation of (A) the provisions of the Certificate of Incorporation or By-laws of the Company or (B) any statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over the Company or any of its subsidiaries or any of their properties, except in the case of subclauses (i) and (ii) (B) above, for conflicts, breaches or violations that would not individually or in the aggregate, result in a Material Adverse Effect; and no consent, approval, authorization, order, registration or qualification of or with any such court or governmental agency or body is required for the sale of the Shares or the consummation by the Company of the transactions contemplated by this Agreement, except the registration under the Act of the Shares and such consents, approvals, authorizations, registrations or qualifications as may be required under state securities or Blue Sky laws in connection with the purchase and distribution of the Shares by the Underwriter;

(l) Neither the Company nor any of its subsidiaries is (i) in violation of their respective charter or by-laws or (ii) in default in the performance or observance of any material obligation, agreement, covenant or condition contained in any indenture, mortgage, deed of trust, loan agreement, lease or other agreement or instrument to which it is a party or by which it or any of its properties may be bound, except in the case of this subsection (ii) for defaults which would not have a Material Adverse Effect;

(m) This Agreement has been duly authorized, executed and delivered by the Company;

(n) The statements set forth in the Pricing Prospectus and Prospectus under the caption “Description of Our Capital Stock”, insofar as they purport to constitute a summary of the terms of the Stock, under the caption “Risk Factors—Provisions of Delaware law, our certificate of incorporation and by-laws, could delay or prevent a change in control of our company, which could adversely impact the value of our common stock”, under the caption “Certain United States Federal Income and Estate Tax Consequences to Non-U.S. Holders”, and under the caption “Underwriting”, insofar as they purport to describe the provisions of the laws and documents referred to therein, are accurate, complete and fair;

(o) Other than as set forth in the Pricing Prospectus, there are no legal or governmental proceedings pending to which the Company or any of its subsidiaries is a party or of which any property of the Company or any of its subsidiaries is the subject which, if determined adversely to the Company or any of its subsidiaries, would individually or in the aggregate have a Material Adverse Effect; and, to the best of the Company’s knowledge, no such proceedings are threatened or contemplated by governmental authorities or threatened by others;

(p) The Company is not and, after giving effect to the offering and sale of the Shares and the application of the proceeds thereof, will not be an “investment company,” as such term is defined in the Investment Company Act of 1940, as amended (the “Investment Company Act”);

(q) At the time of filing the Initial Registration Statement the Company was not and is not an “ineligible issuer,” as defined under Rule 405 under the Act;

(r) KPMG LLP, who has certified certain financial statements of the Company and its subsidiaries, is an independent registered public accounting firm as required by the Act and the rules and regulations of the Commission thereunder;

(s) Except as disclosed in the Pricing Prospectus, the Company maintains a system of internal control over financial reporting (as such term is defined in Rule 13a-15(f) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) that complies with the requirements of the Exchange Act and has been designed by the Company’s principal executive officer and principal financial officer, or under their supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. Except as disclosed in the Pricing Prospectus, the Company’s internal control over financial reporting is effective and the Company is not aware of any material weaknesses in its internal control over financial reporting;

(t) Except as disclosed in the Pricing Prospectus, since the date of the latest audited financial statements included or incorporated by reference in the Pricing Prospectus, there has been no change in the Company’s internal control over financial reporting that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting;

(u) Except as disclosed in the Pricing Prospectus, the Company maintains disclosure controls and procedures (as such term is defined in Rule 13a-15(e) under the Exchange Act) that comply with the requirements of the Exchange Act; such disclosure controls and procedures have been designed to ensure that material information relating to the Company and its subsidiaries is made known to the Company’s principal executive officer and principal financial officer by others within those entities; and except as disclosed in the Pricing Prospectus, such disclosure controls and procedures are effective;

(v) Except as described in the Pricing Prospectus and except as would not, singly or in the aggregate, have a Material Adverse Effect (A) neither the Company nor any of its subsidiaries is in violation of any federal, state, local or foreign statute, law, rule, regulation, ordinance, code, policy or rule of common law or any judicial or administrative interpretation thereof, including any judicial or administrative order, consent, decree or judgment, relating to pollution or protection of human health (to the extent relating to exposure to Hazardous Materials (as defined below)), the environment (including ambient air, surface water, groundwater, land surface or subsurface strata) or wildlife, including, without limitation, laws and regulations relating to the release or threatened release of chemicals, pollutants, contaminants, wastes, toxic substances, hazardous substances, petroleum or petroleum products, asbestos-containing materials or toxic mold (collectively, “Hazardous Materials”) or to the manufacture, processing, distribution, use, treatment, storage, disposal, transport or handling of Hazardous Materials (collectively, “Environmental Laws”), (B) the Company and its subsidiaries have all permits, authorizations and approvals required under any applicable Environmental Laws and are each in compliance with their requirements, (C) there are no pending or, to the Company’s knowledge, threatened administrative, regulatory or judicial actions, suits or written demands, demand letters, claims, notices of noncompliance or violation, or investigations or proceedings relating to any Environmental Law against the Company or any of its subsidiaries and (D) to the Company’s knowledge, there are no events or circumstances that would reasonably be expected to form the basis of an order for clean-up or remediation, or an action, suit or proceeding by any private party or governmental body or agency, against or affecting the Company or any of its subsidiaries pursuant to any Environmental Laws;

(w) Except as disclosed in the Pricing Prospectus, each of the Company and its subsidiaries maintains insurance covering its properties, operations, personnel and businesses which insures against such losses and risks as are adequate in accordance with its reasonable business judgment to protect the Company and its subsidiaries and their businesses, and all such insurance is in full force and effect. The Company has no reason to believe that it or any subsidiary will not be able (A) to renew its existing insurance coverage as and when such policies expire or (B) to obtain comparable coverage from similar institutions as may be necessary or appropriate to conduct its business as now conducted and at a cost that would not have a material adverse affect on the current or future consolidated financial position, stockholders’ equity or results of operations of the Company and its subsidiaries;

(x) The Company and its subsidiaries possess such permits, licenses, approvals, consents and other authorizations (collectively, “Governmental Licenses”) issued by the appropriate federal, state, local or foreign regulatory agencies or bodies necessary to conduct the business now operated by them, except where the failure so to possess would not, singly or in the aggregate, have a Material Adverse Effect; the Company and its subsidiaries are in compliance with the terms and conditions of all such Governmental Licenses, except where the failure so to comply would not, singly or in the aggregate, have a Material Adverse Effect; all of the Governmental Licenses are valid and in full force and effect, except when the invalidity of such Governmental Licenses or the failure of such Governmental Licenses to be in full force and effect would not, singly or in the aggregate, have a Material Adverse Effect; and neither the Company nor any of its subsidiaries has received any notice of proceedings relating to the revocation or modification of any such Governmental Licenses which, singly or in the aggregate, would not have a Material Adverse Effect;

(y) The Company and its subsidiaries own or possess, or can acquire on reasonable terms, adequate 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, trade names or other intellectual property (collectively, “Intellectual Property”) necessary to carry on the business now operated by them, and neither the Company nor any of its subsidiaries has received any notice or has knowledge of any infringement of or conflict with asserted rights of others with respect to any Intellectual Property or of any facts or circumstances which would render any Intellectual Property invalid or inadequate to protect the interest of the Company or any of its subsidiaries therein, and which infringement or conflict (if the subject of any unfavorable decision, ruling or finding) or invalidity or inadequacy, singly or in the aggregate, would not have a Material Adverse Effect;

(z) No labor dispute with the employees of the Company and its subsidiaries exists or, to the knowledge of the Company, is imminent that could have a Material Adverse Effect;

(aa) Any third-party statistical and market-related data included or incorporated by reference in the Pricing Prospectus and Prospectus or any Issuer Free Writing Prospectus are based on or derived from sources that the Company believes to be reliable and accurate;

(bb) Neither the Company nor any of its subsidiaries nor any agent thereof acting on their behalf has taken, and none of them will take, any action that might cause this Agreement or the sale of the Shares to violate Regulation T, Regulation U or Regulation X of the Board of Governors of the Federal Reserve System;

(cc) Each of the Company and each of its subsidiaries and any of their respective officers, directors, supervisors, managers, agents or employees has not violated, its participation in the offering will not violate, and it has instituted and maintains policies and procedures designed to ensure continued compliance each of the following laws: (a) anti-bribery laws, including but not limited to, any applicable law, rule, or regulation of any locality, including but not limited to any law, rule, or regulation promulgated to implement the OECD Convention on Combating Bribery of Foreign Public Officials in International Business Transactions, signed December 17, 1997, including the U.S. Foreign Corrupt Practices Act of 1977 or any other law, rule or regulation of similar purpose and scope, (b) anti-money laundering laws, including but not limited to, applicable federal, state, international, foreign or other laws, regulations or government guidance regarding anti-money laundering, including, without limitation, Title 18 U.S. Code section 1956 and 1957, the Patriot Act, the Bank Secrecy Act, and international anti-money laundering principals or procedures by an intergovernmental group or organization, such as the Financial Action Task Force on Money Laundering, of which the United States is a member and with which designation the United States representative to the group or organization continues to concur, all as amended, and any Executive order, directive, or regulation pursuant to the authority of any of the foregoing, or any orders or licenses issued thereunder and (c) laws and regulations imposing U.S. economic sanctions measures, including, but not limited to, the International Emergency Economic Powers Act, the Trading with the Enemy Act, the United Nations Participation Act, and the Syria Accountability and Lebanese Sovereignty Act, all as amended, and any Executive Order, directive, or regulation pursuant to the authority of any of the foregoing, including the regulations of the United States Treasury Department set forth under 31 CFR, Subtitle B, Chapter V, as amended, or any orders or licenses issued thereunder;

(dd) The date of this Agreement is not more than two years subsequent to the more recent of the initial effective time of the Registration Statement; if, immediately prior to the third anniversary of the more recent of the initial effective time of the Registration Statement, any of the Shares 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 Shares, 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 Shares to continue as contemplated in the expired registration statement relating to the Shares; references herein to the Registration Statement shall include such new shelf registration statement;

(ee) No person, including the stockholders of the Company, has any preemptive rights with respect to the Stock; and none of the outstanding shares of capital stock of the Company have been issued in violation of any preemptive or similar rights of any security holder; and

(ff) The Company has not taken, directly or indirectly, any action that is designed to or that has constituted or that would reasonably be expected to cause or result in the stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Shares.

2. The Selling Stockholder represents and warrants to, and agrees with, each of the Underwriter and the Company that:

(a) All consents, approvals, authorizations and orders necessary for the execution and delivery by such Selling Stockholder of this Agreement, and for the sale and delivery of the Shares to be sold by such Selling Stockholder hereunder, have been obtained; and such Selling Stockholder has full right, power and authority to enter into this Agreement and to sell, assign, transfer and deliver the Shares to be sold by such Selling Stockholder hereunder;

(b) The sale of the Shares to be sold by such Selling Stockholder hereunder and the compliance by such Selling Stockholder with all of the provisions of this Agreement and the consummation of the transactions herein and therein contemplated will not result in a breach or violation of any of the terms or provisions of, or constitute a default under, any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which such Selling Stockholder is a party or by which such Selling Stockholder is bound or to which any of the property or assets of such Selling Stockholder is subject, nor will such action result in any violation of the provisions of any document of formation or governing document of the Selling Stockholder or any statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over such Selling Stockholder or the property of such Selling Stockholder, except in each case, such as will not have a material adverse effect on the Selling Stockholder’s ability to consummate the transactions contemplated herein;

(c) Such Selling Stockholder has, and immediately prior to the Time of Delivery (as defined in Section 5 hereof) such Selling Stockholder will have, good and valid title to the Shares to be sold by such Selling Stockholder hereunder, free and clear of all liens, encumbrances or claims (other than such as may be created pursuant to this Agreement); and, upon delivery of such Shares and payment therefor pursuant hereto, good and valid title to such Shares, free and clear of all liens, encumbrances, or claims, will pass to the Underwriter;

(d) Such Selling Stockholder has not taken and will not take, directly or indirectly, any action which is designed to or which has constituted or which might reasonably be expected to cause or result in stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Shares;

(e) To the extent that any statements (or omissions therefrom) made in the Registration Statement, any Preliminary Prospectus, the Prospectus, any Issuer Free Writing Prospectus or any

amendment or supplement thereto are made in reliance upon and in conformity with written information furnished to the Company by such Selling Stockholder expressly for use therein (the “Selling Stockholder Information”), such statements (or omissions therefrom) in the Preliminary Prospectus and the Registration Statement did, and the statements (or omissions therefrom) in the Prospectus and any further amendments or supplements to the Registration Statement and the Prospectus, when they become effective or are filed with the Commission, as the case may be, will conform in all material respects to the requirements of the Act and the rules and regulations of the Commission thereunder 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 in light of the circumstances under which they were made not misleading; provided that it is understood and agreed that, for purposes of this Agreement, the only Selling Stockholder Information furnished by the Selling Stockholder consists of the information in the Prospectus under the captions “Selling Stockholders” and “The Selling Stockholder”;

(f) In order to document the Underwriter’s compliance with the reporting and withholding provisions of the Internal Revenue Code of 1986, as amended, and the United States Treasury Department regulations promulgated thereunder, with respect to the transactions herein contemplated, such Selling Stockholder will deliver to you prior to or at the Time of Delivery (as hereinafter defined) a properly completed and executed United States Treasury Department Form W-9 (or other applicable form or statement specified by Treasury Department regulations in lieu thereof);

(g) The Shares will be, at the Time of Delivery, subject to the interest of the Underwriter hereunder; the obligations of the Selling Stockholder hereunder shall not be terminated by operation of law, whether by dissolution of the Selling Stockholder or by the occurrence of any other event; and if the Selling Stockholder should be dissolved, or if any other similar such event should occur, before the delivery of the Shares hereunder, certificates representing the Shares shall be delivered by or on behalf of the Selling Shareholders in accordance with the terms, and subject to the conditions of, this Agreement;

(h) The net proceeds from the offering of Shares contemplated hereby and any concurrent offering will not be used to fund any operations in, finance any investments in or make any payments to any country, or to make any payments to any person, in a manner that violates in any material respect any of the economic sanctions of the United States administered by the United States Treasury Department’s Office of Foreign Assets Control;

(i) Neither the Selling Stockholder nor any person acting on behalf of the Selling Stockholder (other than, if applicable, the Company and the Underwriter) has used or referred to any “free writing prospectus” (as defined in Rule 405), relating to the Shares except as set forth on Schedule II hereto;

(j) This Agreement has been duly and validly authorized, executed and delivered by or on behalf of the Selling Stockholder;

(k) The sale of the Shares by the Selling Stockholder does not, to the knowledge of such Selling Stockholder, violate any of the Company’s internal policies regarding the sale of Shares by its affiliates; and

(l) The sale of the Shares by the Selling Stockholder pursuant hereto is not prompted by any information concerning the Company or any of its subsidiaries that has come to the attention of

the Selling Stockholder and is not set forth in the Pricing Prospectus, the Prospectus or any supplement thereto.

3. Subject to the terms and conditions herein set forth, the Selling Stockholder agrees to sell to the Underwriter, and the Underwriter agrees to purchase from the Selling Stockholder, at a purchase price per share of $20.75, the number of Shares set forth on Schedule I hereto.

4. It is understood that the Underwriter proposes to offer the Shares for sale upon the terms and conditions set forth in the Prospectus.

5. (a) The Shares to be purchased by the Underwriter hereunder will be represented by one or more definitive global shares in book entry form that will be deposited by or on behalf of the Selling Stockholder with the Depository Trust Company (“DTC”) or its designated custodian. The Selling Stockholder will deliver the Shares to the Underwriter against payment of the purchase price therefor by wire transfer of Federal (same-day) funds to the account or accounts specified by the Selling Stockholder to the Underwriter at least forty-eight hours in advance by causing DTC to credit Shares to the account of the Underwriter of DTC. The Selling Stockholder will cause the Shares to be made eligible for transfer through DTC’s Direct Registration System twenty-four hours prior to the Time of Delivery (as defined below). The time and date of such delivery and payment shall be, with respect to the Shares, 9:30 a.m., New York City time, on August 17, 2012 or such other time and date as the Underwriter, the Company and the Selling Stockholder may agree upon in writing. Such time and date for delivery of the Shares is herein called the “Time of Delivery”.

(b) The documents to be delivered at the Time of Delivery by or on behalf of the parties hereto pursuant to Section 9 hereof, including the cross receipt for the Shares and any additional documents reasonably requested by the Underwriter pursuant to Section 9(j) hereof, will be delivered at the offices of Cravath, Swaine & Xxxxx LLP, Worldwide Plaza, 000 Xxxxxx Xxxxxx, Xxx Xxxx, XX 00000 (the “Closing Location”). A meeting will be held at the Closing Location at 3:00 p.m., New York City time, on the New York Business Day next preceding the Time of Delivery, at which meeting the final drafts of the documents to be delivered pursuant to the preceding sentence will be available for review by the parties hereto. For the purposes of this Section 5, “New York Business Day” shall mean each Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on which banking institutions in New York City are generally authorized or obligated by law or executive order to close. The Selling Stockholder covenants and agrees with the Underwriter that such Selling Stockholder will pay all transfer taxes on the sale by the Selling Stockholder of Shares to the Underwriter.

6. The Company agrees with the Underwriter:

(a) To prepare the Prospectus in a form approved by you and to file such Prospectus pursuant to Rule 424(b) under the Act not later than the Commission’s close of business on the second business day following the execution and delivery of this Agreement, or, if applicable, such earlier time as may be required by Rule 430A(a)(3) under the Act; to make no further amendment or any supplement to the Registration Statement or the Prospectus prior to the Time of Delivery which shall be disapproved by you promptly after reasonable notice thereof; to advise you, promptly after it receives notice thereof, of the time when any amendment to the Registration Statement has been filed or becomes effective or any amendment or supplement to the Prospectus has been filed and to furnish you with copies thereof; to file promptly all reports and any definitive proxy or information statements required to be filed by the Company with the Commission pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act subsequent to the date of the Prospectus and for so long as the

delivery of a prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the Act) is required in connection with the offering or sale of the Shares; to file promptly all material required to be filed by the Company with the Commission pursuant to Rule 433(d) under the Act; to advise you, promptly after it receives notice thereof, of the issuance by the Commission of any stop order or of any order preventing or suspending the use of any Preliminary Prospectus or other prospectus in respect of the Shares, of the suspension of the qualification of the Shares for offering or sale in any jurisdiction, of the initiation or threatening of any proceeding for any such purpose, or of any request by the Commission for the amending or supplementing of the Registration Statement or the Prospectus or for additional information; and, in the event of the issuance of any stop order or of any order preventing or suspending the use of any Preliminary Prospectus or other prospectus or suspending any such qualification, to promptly use its best efforts to obtain the withdrawal of such order;

(b) Promptly from time to time to take such action as you may reasonably request to qualify the Shares for offering and sale under the securities laws of such jurisdictions as you may request and to comply with such laws so as to permit the continuance of sales and dealings therein in such jurisdictions for as long as may be necessary to complete the distribution of the Shares, provided that in connection therewith the Company shall not be required to qualify as a foreign corporation or to file a general consent to service of process in any jurisdiction;

(c) Prior to 2:00 p.m., New York City time, on the New York Business Day next succeeding the date of this Agreement and from time to time, to furnish the Underwriter with written and electronic copies of the Prospectus in New York City in such quantities as you may reasonably request, and, if the delivery of a prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the Act) is required at any time prior to the expiration of nine months after the time of issue of the Prospectus in connection with the offering or sale of the Shares and if at such time any event shall have occurred as a result of which the Prospectus as then amended or supplemented would include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made when such Prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the Act) is delivered, not misleading, or, if for any other reason it shall be necessary during such same period to amend or supplement the Prospectus or to file under the Exchange Act any document incorporated by reference in the Prospectus in order to comply with the Act or the Exchange Act, to notify you and upon your request to file such document and to prepare and furnish without charge to the Underwriter and to any dealer in securities as many written and electronic copies as you may from time to time reasonably request of an amended Prospectus or a supplement to the Prospectus which will correct such statement or omission or effect such compliance; and in case the Underwriter is required to deliver a prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the Act) in connection with sales of any of the Shares at any time nine months or more after the time of issue of the Prospectus, upon your request but at the expense of the Underwriter, to prepare and deliver to the Underwriter as many written and electronic copies as you may request of an amended or supplemented Prospectus complying with Section 10(a)(3) of the Act; neither the 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 9 hereof;

(d) To make generally available to its security holders as soon as practicable, but in any event not later than sixteen months after the effective date of the Registration Statement (as defined in Rule 158(c) under the Act), an earnings statement of the Company and its subsidiaries (which need not be audited) complying with Section 11(a) of the Act and the rules and regulations of the

Commission thereunder (including, at the option of the Company, Rule 158);

(e) The Company and Selling Stockholder will furnish to the Underwriter copies of the Registration Statement, including all exhibits, Pricing Prospectus, the Prospectus and all amendments and supplements to such documents, in each case as soon as available and in such quantities as the Underwriter reasonably requests, and the Company and Selling Stockholder will pay the expenses of printing and distributing to the Underwriter all such documents;

(f) During the period beginning from the date hereof and continuing to and including the date 30 days after the date of the Prospectus (the “Lock-Up Period”), the Company agrees not to (i) offer, sell, contract to sell, pledge, grant any option to purchase, make any short sale or otherwise dispose, except as provided hereunder, of any securities of the Company that are substantially similar to the Shares, including but not limited to any options, rights or warrants to purchase shares of Stock or any securities that are convertible into or exchangeable or exercisable for, or that represent the right to receive, Stock or any such substantially similar securities; (ii) enter into any swap, hedge or any other agreement that transfers, in whole or in part, the economic consequences of ownership of Stock; or (iii) establish or increase a put equivalent position or liquidate or decrease a call equivalent position in Stock within the meaning of Section 16 of the Exchange Act (other than (i) pursuant to employee stock option plans existing on, or upon the conversion or exchange of convertible or exchangeable securities outstanding as of, the date of this Agreement; or (ii) the issuance of shares of Stock in exchange for the assets of, or a majority or controlling portion of the equity of, another entity in connection with the acquisition by the Company or any of its subsidiaries of such entity, provided, however, that (x) the aggregate number of shares so issued shall not exceed 5% of the number of shares of Stock of the Company outstanding following the offering and sale of the Shares in accordance with this Agreement and (y) prior to the issuance of such shares, each recipient of such shares shall execute an agreement in form and substance set forth on Annex II hereto), without your prior written consent; provided, however, that if (1) during the last 17 days of the initial Lock-Up Period, the Company releases earnings results or announces material news or a material event or (2) prior to the expiration of the initial Lock-Up Period, the Company announces that it will release earnings results during the 15-day period following the last day of the initial Lock-Up Period, then in each case the Lock-Up Period will be automatically extended until the expiration of the 18-day period beginning on the date of release of the earnings results or the announcement of the material news or material event, as applicable, unless Deutsche Bank Securities Inc. waives, in writing, such extension; the Company will provide Deutsche Bank Securities Inc. and each stockholder subject to the Lock-Up Period pursuant to the lockup letters described in Section 9(h) with prior notice of any such announcement that gives rise to an extension of the Lock-up Period;

(g) To furnish to its stockholders as soon as practicable after the end of each fiscal year an annual report (including a balance sheet and statements of income, stockholders’ equity and cash flows of the Company and its consolidated subsidiaries certified by independent public accountants) and, as soon as practicable after the end of each of the first three quarters of each fiscal year (beginning with the fiscal quarter ending after the effective date of the Registration Statement), to make available to its stockholders consolidated summary financial information of the Company and its subsidiaries for such quarter in reasonable detail; provided, however, that the Company may satisfy the requirements of this subsection (g) by electronically filing such information with the Commission via the Commission’s XXXXX system (or any successor system);

(h) During a period of two years from the effective date of the Registration Statement, to furnish to you copies of all reports or other communications (financial or other) furnished to the

Company’s stockholders, and to deliver to you as soon as practicable after they are available, copies of any reports and financial statements furnished to or filed with the Commission or any national securities exchange on which any class of securities of the Company is listed other than such reports and financial statements that are publicly available on the Commission’s XXXXX system (or any successor system);

(i) [Reserved];

(j) To use its best efforts to list for quotation the Shares on the NASDAQ Global Select Market (“NASDAQ”);

(k) If the Company elects to rely upon Rule 462(b), the Company shall file a Rule 462(b) Registration Statement with the Commission in compliance with Rule 462(b) by 10:00 P.M., Washington, D.C. time, on the date of this Agreement, and the Company shall at the time of filing either pay to the Commission the filing fee for the Rule 462(b) Registration Statement or give irrevocable instructions for the payment of such fee pursuant to Rule 111(b) under the Act;

(l) Upon request of the Underwriter, to furnish, or cause to be furnished, to the Underwriter an electronic version of the Company’s trademarks, servicemarks and corporate logo for use on the website, if any, operated by the Underwriter for the purpose of facilitating the on-line offering of the Shares (the “License”); provided, however, that the License shall be used solely for the purpose described above, is granted without any fee and may not be assigned or transferred; and

(m) The Company will not take, directly or indirectly, any action that is designed to or that has constituted or that might reasonably be expected to cause or result in the stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Shares.

7. (a) Each of the Company and the Selling Stockholder represents and agrees that, without the prior consent of Deutsche Bank Securities Inc., it has not made and will not make any offer relating to the Shares that would constitute a “free writing prospectus” as defined in Rule 405 under the Act; the Underwriter represents and agrees that, without the prior consent of the Company it has not made and will not make any offer relating to the Shares that would constitute a free writing prospectus; any such free writing prospectus the use of which has been consented to by the Company is listed on Schedule II hereto;

(b) The Company has complied and will comply with the requirements of Rule 433 under the Act applicable to any Issuer Free Writing Prospectus, including timely filing with the Commission or retention where required and legending;

(c) The Company agrees that if at any time following issuance of an Issuer Free Writing Prospectus any event occurred or occurs as a result of which such Issuer Free Writing Prospectus would conflict with the information in the Registration Statement, the Pricing Prospectus or the Prospectus or would include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances then prevailing, not misleading, the Company will give prompt notice thereof to the Underwriter, and if requested by the Underwriter, will prepare and furnish without charge to the Underwriter an Issuer Free Writing Prospectus or other document which will correct such conflict, statement or omission; provided, however, that this representation and warranty shall not apply to any statements or omissions in an Issuer Free Writing Prospectus made in reliance upon and in conformity with information furnished in writing to the Company by the Underwriter expressly for use therein, it being understood and

agreed that the only such information is that described in Section 10(c) hereof.

8. The Company and the Selling Stockholder covenant and agree with one another and with the Underwriter that the Company will pay or cause to be paid the following: (i) the fees, disbursements and expenses of the Company’s counsel, the Selling Stockholder’s counsel and the Company’s accountants in connection with the registration of the Shares under the Act and all other expenses in connection with the preparation, printing, reproduction and filing of the Registration Statement, any Preliminary Prospectus, any Issuer Free Writing Prospectus and the Prospectus and amendments and supplements thereto and the mailing and delivering of copies thereof to the Underwriter and dealers; (ii) the cost of printing or producing any Agreement by the Underwriter, this Agreement, the Blue Sky Memorandum, closing documents (including any compilations thereof) and any other documents in connection with the offering, purchase, sale and delivery of the Shares; (iii) all expenses in connection with the qualification of the Shares for offering and sale under state securities laws as provided in Section 6(b) hereof, including the fees and disbursements of counsel for the Underwriter in connection with such qualification and in connection with the Blue Sky survey; (iv) all fees and expenses in connection with listing the Shares on NASDAQ; (v) the filing fees incident to, and the fees and disbursements of counsel for the Underwriter in connection with, any required review by the Financial Industry Regulatory Authority, Inc. of the terms of the sale of the Shares; (vi) the cost of preparing any stock certificates; (vii) the cost and charges of any transfer agent or registrar; and (viii) all other costs and expenses incident to the performance of its obligations hereunder which are not otherwise specifically provided for in this Section. It is understood, however, that, except as provided in this Section, and Sections 10 and 12 hereof, the Underwriter will pay all of its own costs and expenses, including the fees of its counsel, stock transfer taxes on resale of any of the Shares by it, and any advertising expenses connected with any offers the Underwriter may make.

9. The obligations of the Underwriter hereunder, as to the Shares to be delivered at the Time of Delivery, shall be subject, in its discretion, to the condition that all representations and warranties and other statements of the Company and of the Selling Stockholder herein, and the statements of the officers of the Company pursuant to the provisions hereof, at and as of the Time of Delivery, are true and correct, the condition that the Company and the Selling Stockholder shall have performed all of its obligations hereunder theretofore to be performed, and the following additional conditions:

(a) The Prospectus shall have been filed with the Commission pursuant to Rule 424(b) under the Act within the applicable time period prescribed for such filing by the rules and regulations under the Act and in accordance with Section 6(a) hereof; all material required to be filed by the Company pursuant to Rule 433(d) under the Act shall have been filed with the Commission within the applicable time period prescribed for such filing by Rule 433; if the Company has elected to rely upon Rule 462(b) under the Act, the Rule 462(b) Registration Statement shall have become effective by 10:00 P.M., Washington, D.C. time, on the date of this Agreement; no stop order suspending the effectiveness of the Registration Statement or any part thereof shall have been issued and no proceeding for that purpose shall have been initiated or threatened by the Commission; no stop order suspending or preventing the use of the Prospectus or any Issuer Free Writing Prospectus shall have been initiated or threatened by the Commission; and all requests for additional information on the part of the Commission shall have been complied with to your reasonable satisfaction;

(b) Cravath, Swaine & Xxxxx LLP, counsel for the Underwriter, shall have furnished to you such written opinion or opinions and a negative assurance letter, dated the Time of Delivery, in form and substance satisfactory to you, with respect to such matters as you may reasonably request, and such counsel shall have received such papers and information as they may reasonably request to

enable them to pass upon such matters;

(c) Xxxxxx Xxxxxx & Xxxxxxx LLP, counsel for the Company, and Xxxxxx X. Xxxxxxx, general counsel for the Company, shall have furnished to you their written opinions and, in the case of Xxxxxx Xxxxxx & Xxxxxxx LLP, a negative assurance letter, dated the Time of Delivery, in form and substance satisfactory to you.

(d) Counsel for the Selling Stockholder, as indicated in Schedule III hereto, shall have furnished to you their written opinion with respect to the Selling Stockholder for whom they are acting as counsel, dated the Time of Delivery, in form and substance satisfactory to you.

(e) On the date hereof, on the effective date of any post-effective amendment to the Registration Statement filed subsequent to the date of this Agreement and also at the Time of Delivery, KPMG LLP shall have furnished to you a letter or letters, dated the respective dates of delivery thereof, in form and substance satisfactory to you, to the effect set forth in Annex I hereto, except that, in any letter dated as of the Time of Delivery, the specified date referred to in Annex I shall be a date no more than three business days prior to such Time of Delivery (the executed copy of the letter delivered prior to the execution of this Agreement is attached as Annex I(a) hereto and a draft of the form of letter to be delivered on the effective date of any post-effective amendment to the Registration Statement and as of the Time of Delivery is attached as Annex I(b) hereto);

(f) 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 or properties of the Company and its subsidiaries taken as a whole which, in the judgment of the Underwriter, is material and adverse and makes it impractical or inadvisable to market the Shares; (ii) any downgrading in the rating of any debt securities of the Company by any “nationally recognized statistical rating organization” (as defined for purposes of Section 3 of the Exchange Act), or any public announcement that any such organization has under surveillance or review its rating of any debt securities of the Company (other than an announcement with positive implications of a possible upgrading, and no implication of a possible downgrading, of such rating) or any announcement that the Company has been placed on negative outlook; (iii) any change in 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 proceed with the offering, sale or delivery of, or to enforce contracts for the sale of, the Shares, 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) 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 in the judgment of the Underwriter impractical or inadvisable to proceed with the offering, sale or delivery of the Shares or to enforce contracts for the sale of the Shares;

(g) The Shares to be sold at the Time of Delivery shall have been duly listed for quotation on NASDAQ;

(h) The Company shall have obtained and delivered to the Underwriter executed copies of an agreement from the stockholders, directors and executive officers named on Schedule III, in form and substance set forth on Annex II hereto;

(i) The Company shall have complied with the provisions of Section 6(c) hereof with respect to the furnishing of prospectuses on the New York Business Day next succeeding the date of this Agreement; and

(j) The Company and the Selling Stockholder shall have furnished or caused to be furnished to you at the Time of Delivery certificates of officers of the Company and of the Selling Stockholder satisfactory to you as to the accuracy of the representations and warranties of the Company and the Selling Stockholder, respectively, herein at and as of the Time of Delivery, as to the performance by the Company and the Selling Stockholder of all of their respective obligations hereunder to be performed at or prior to the Time of Delivery, and the Company shall have furnished or caused to be furnished certificates as to the matters set forth in subsections (a) and (f) of this Section.

The Company will furnish the Underwriter with such conformed copies of such opinions, certificates, letters and documents as the Underwriter reasonably requests.

10. (a) The Company will indemnify and hold harmless the Underwriter against any losses, claims, damages or liabilities, joint or several, to which the Underwriter may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, any Issuer Free Writing Prospectus or any “issuer information” filed or required to be filed pursuant to Rule 433(d) under the Act, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, and will reimburse the Underwriter for any legal or other expenses reasonably incurred by the Underwriter in connection with investigating or defending any such loss, claim, damage, liability, action, litigation or investigation or proceeding whatsoever (whether or not the Underwriter 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 shall 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 or omission or alleged omission made in the Registration Statement, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, or any Issuer Free Writing Prospectus, in reliance upon and in conformity with written information furnished to the Company by the Underwriter expressly for use therein as described in subsection (c) below.

(b) The Selling Stockholder will indemnify and hold harmless the Underwriter and the Company against any losses, claims, damages or liabilities, joint or several, to which the Underwriter and the Company may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, any Issuer Free Writing Prospectus or any “issuer information” filed or required to be filed pursuant to Rule 433(d) under the Act, or arise out of or are based upon the omission or alleged omission to state therein 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 Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, or any Issuer Free Writing Prospectus, in reliance upon and in conformity with the Selling Stockholder Information; and will reimburse the Underwriter and the Company for any legal or other expenses reasonably incurred by the Underwriter and the Company in connection with investigating or defending any such loss, claim, damage, liability, action, litigation or investigation or proceeding whatsoever (whether or not the Underwriter 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 shall 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 or omission or alleged omission made in the Registration Statement, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, or any Issuer Free Writing Prospectus, in reliance upon and in conformity with written information furnished to the Company by the Underwriter expressly for use therein as described in subsection (c) below; provided, further, that the liability of the Selling Stockholder pursuant to this subsection (b) shall be limited to an amount equal to the amount of gross proceeds attributable to the sale of the Selling Stockholder’s Shares.

(c) The Underwriter will indemnify and hold harmless the Company and the Selling Stockholder against any losses, claims, damages or liabilities to which the Company or such Selling Stockholder may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, or any Issuer Free Writing Prospectus, or arise out of or are based upon the omission or alleged omission to state therein 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 Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, or any Issuer Free Writing Prospectus, in reliance upon and in conformity with written information furnished to the Company by the Underwriter expressly for use therein; and will reimburse the Company and the Selling Stockholder for any legal or other expenses reasonably incurred by the Company and the Selling Stockholder in connection with investigating or defending any such action or claim as such expenses are incurred; it being understood that the only such information furnished by the Underwriter consists of the fourth, ninth and twelfth paragraphs under the caption “Underwriting” in the Prospectus.

(d) Promptly after receipt by an indemnified party under subsection (a), (b) or (c) above of notice of the commencement of any action, such indemnified party shall, if a claim in respect thereof is to be made against the indemnifying party under such subsection, notify the indemnifying party in writing of the commencement thereof; but the omission so to notify the indemnifying party shall not relieve it from any liability which it may have to any indemnified party otherwise than under such subsection. In case any such action shall be brought against any indemnified party and it shall notify the indemnifying party of the commencement thereof, the indemnifying party shall be entitled to participate therein and, to the extent that it shall wish, jointly with any other indemnifying party similarly notified, to assume the defense thereof, with counsel reasonably 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 shall not be liable to such indemnified party under such subsection for any legal expenses of other counsel or any other expenses, in each case subsequently incurred by such indemnified party, in connection with the defense thereof other than reasonable costs of investigation. No indemnifying party shall, without the written consent of the indemnified party, effect the settlement or compromise of, or consent to the entry of any judgment with respect to, any pending or threatened action or claim in respect of which indemnification or contribution may be sought hereunder (whether or not the indemnified party is an actual or potential party to such action or claim) unless such settlement, compromise or judgment (i) includes an unconditional release of the indemnified party from all liability arising out of such action or claim and (ii) does not include a statement as to or an admission of fault, culpability or a failure to act, by or on behalf of any indemnified party.

(e) If the indemnification provided for in this Section 10 is unavailable to or insufficient to hold harmless an indemnified party under subsection (a), (b) or (c) above in respect of any losses, claims, damages or liabilities (or actions in respect thereof) referred to therein, then each indemnifying party shall contribute to the amount paid or payable by such indemnified party as a result of such losses, claims, damages or liabilities (or actions in respect thereof) 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 Shares. If, however, the allocation provided by the immediately preceding sentence is not permitted by applicable law or if the indemnified party failed to give the notice required under subsection (d) above, then each indemnifying party shall contribute to such amount paid or payable by such indemnified party in such proportion as is appropriate to reflect not only such relative benefits 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 (or actions in respect thereof), 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 discount 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 or the Selling Stockholder on the one hand or the Underwriter on the other and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. The Company, the Selling Stockholder and the Underwriter agree that it would not be just and equitable if contribution pursuant to this subsection (e) were determined by pro rata allocation or by any other method of allocation which does not take account of the equitable considerations referred to above in this subsection (e). The amount paid or payable by an indemnified party as a result of the losses, claims, damages or liabilities (or actions in respect thereof) referred to above in this subsection (e) shall be deemed to include 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 subsection (e), (i) the Underwriter shall not 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 which the 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 aggregate gross proceeds received by the Selling Stockholder from the Underwriter for the Shares. 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.

(f) The obligations of the Company and the Selling Stockholder under this Section 10 shall be in addition to any liability which the Company and the Selling Stockholder may otherwise have and shall extend, upon the same terms and conditions, to the Underwriter’s partners, members, directors, officers, employees, agents, affiliates and to each person, if any, who controls the Underwriter within the meaning of the Act and each affiliate of the Underwriter; and the obligations of the Underwriter under this Section 10 shall be in addition to any liability which the Underwriter may otherwise have and shall extend, upon the same terms and conditions, to each officer and director of the Company and to each person, if any, who controls the Company or the Selling Stockholder within the meaning of the Act.

11. The respective indemnities, agreements, representations, warranties and other statements of the Company, the Selling Stockholder or their officers and of the Underwriter, as set forth in this Agreement or made by or on behalf of them, respectively, pursuant to this Agreement, shall remain in full force and effect, regardless of any investigation (or any statement as to the results thereof) made by or on behalf of the Underwriter or any controlling person of the Underwriter, or the Company, or the Selling Stockholder, or any officer or director or controlling person of the Company, or any controlling person of the Selling Stockholder, and shall survive delivery of and payment for the Shares.

12. If for any reason, any Shares are not delivered by or on behalf of the Selling Stockholder as provided herein, the Selling Stockholder will reimburse the Underwriter for all of its out-of-pocket expenses, including fees and disbursements of counsel, reasonably incurred by the Underwriter in making preparations for the purchase, sale and delivery of the Shares not so delivered, but the Company and the Selling Stockholder shall then be under no further liability to the Underwriter except as provided in Sections 8 and 10 hereof.

13. All statements, requests, notices and agreements hereunder shall be in writing, and if to the Underwriter shall be delivered or sent by mail, telex or facsimile transmission to you at Deutsche Bank Securities Inc., 00 Xxxx Xxxxxx, 0xx Xxxxx, Xxx Xxxx, XX 00000, Attention: Equity Capital Markets – Syndicate Desk, fax (000) 000-0000, with a copy to Deutsche Bank Securities Inc., 00 Xxxx Xxxxxx, 00^xx Xxxxx, Xxx Xxxx, XX 00000, Attention: General Counsel, fax: (000) 000-0000, and with a copy to Cravath, Swaine & Xxxxx LLP, Xxxxxxxxx Xxxxx, Xxx Xxxx, XX 00000 Attention: Xxxxxxx X. Xxxxxx, III; and if to the Company shall be delivered or sent by mail, telex or facsimile transmission to the address of the Company set forth in the Registration Statement, Attention: General Counsel and Secretary; and if to the Selling Stockholder shall be delivered or sent by mail, telex or facsimile transmission in care of Sidley Austin LLP, Xxx Xxxxx Xxxxxxxx, Xxxxxxx, Xxxxxxxx 00000 Attention: Xxxxx X. Xxxxxxx; provided, however, that any notice to the Underwriter pursuant to Section 10(d) hereof shall be delivered or sent by mail, telex or facsimile transmission to the Underwriter at its address set forth in its Underwriter’s Questionnaire, or telex constituting such Questionnaire, which address will be supplied to the Company and the Selling Stockholder by you upon request; provided, however, that notices under subsection 6(f) shall be in writing, and if to the Underwriter shall be delivered or sent by mail, telex or facsimile transmission to you at Deutsche Bank Securities Inc., 00 Xxxx Xxxxxx, 0xx Xxxxx, Xxx Xxxx, XX 00000, Attention: Equity Capital Markets – Syndicate Desk, fax (000) 000-0000, with a copy to Deutsche Bank Securities Inc., 00 Xxxx Xxxxxx, 00^xx Xxxxx, Xxx Xxxx, XX 00000, Attention: General Counsel, fax: (000) 000-0000. Any such statements, requests, notices or agreements shall take effect upon receipt thereof.

14. This Agreement shall be binding upon, and inure solely to the benefit of, the Underwriter, the Company, the Selling Stockholder and, to the extent provided in Sections 10 and 11 hereof, the officers and directors of the Company and each person who controls the Company, the Selling Stockholder or the Underwriter, and their respective heirs, executors, administrators, successors and assigns, and no other person shall acquire or have any right under or by virtue of this Agreement. No purchaser of any of the Shares from the Underwriter shall be deemed a successor or assign by reason merely of such purchase.

15. Time shall be of the essence of this Agreement. As used herein, the term “business day” shall mean any day when the Commission’s office in Washington, D.C. is open for business.

16. Each of the Company and the Selling Stockholder acknowledges and agrees that (i) the purchase and sale of the Shares pursuant to this Agreement is an arm’s-length commercial transaction between the Company and the Selling Stockholder, on the one hand, and the Underwriter, on the other, (ii) in connection therewith and with the process leading to such transaction the Underwriter is acting solely as a principal and not the agent or fiduciary of the Company or the Selling Stockholder, (iii) the Underwriter has not assumed an advisory or fiduciary responsibility in favor of the Company or the Selling Stockholder with respect to the offering contemplated hereby or the process leading thereto (irrespective of whether the Underwriter has advised or is currently advising the Company or the Selling Stockholder on other matters) or any other obligation to the Company or the Selling Stockholder except the obligations expressly set forth in this Agreement and (iv) the Company and the Selling Stockholder have consulted their respective legal and financial advisors to the extent they deemed appropriate. Each of the Company and the Selling Stockholder agrees that it will not claim that the Underwriter has rendered advisory services of any nature or respect, or owes a fiduciary or similar duty to the Company or the Selling Stockholder, in connection with such transaction or the process leading thereto.

17. This Agreement supersedes all prior agreements and understandings (whether written or oral) among the Company, the Selling Stockholder and the Underwriter, or between any of them, with respect to the subject matter hereof.

18. This Agreement shall be governed by and construed in accordance with the laws of the State of New York.

The Company and Selling Stockholder hereby submit to the 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. The Company and Selling Stockholder irrevocably and unconditionally waive 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 waive and agree 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.

19. The Company, the Selling Stockholder and the Underwriter hereby irrevocably waive, to the fullest extent permitted by applicable law, any and all right to trial by jury in any legal proceeding arising out of or relating to this Agreement or the transactions contemplated hereby.

20. This Agreement may be executed by any one or more of the parties hereto 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 instrument.

21. Notwithstanding anything herein to the contrary, the Company and the Selling Stockholder are authorized to disclose to any persons the U.S. federal and state income tax treatment and tax structure of the potential transaction and all materials of any kind (including tax opinions and other tax analyses) provided to the Company and the Selling Stockholder relating to that treatment and structure, without the Underwriter imposing any limitation of any kind. However, any information relating to the tax treatment and tax structure shall remain confidential (and the foregoing sentence shall not apply) to the extent necessary to enable any person to comply with securities laws. For this purpose, “tax structure” is limited to any facts that may be relevant to that treatment.

22. In accordance with the requirements of the USA Patriot Act (Title III of Pub. L. 107-56 (signed into law October 26, 2001)), the Underwriter is required to obtain, verify and record information that identifies their respective clients, including the Company, which information may include the name and address of its clients, as well as other information that will allow the Underwriter to properly identify its clients.

[Remainder of page intentionally blank]

If the foregoing is in accordance with your understanding, please sign and return to us six counterparts hereof, and upon the acceptance hereof by you, this letter and such acceptance hereof shall constitute a binding agreement among the Underwriter, the Company and the Selling Stockholder.



	Very truly yours,

	TriMas Corporation

	By:	/s/ Xxxxxx X. Xxxxxxx
		Name: Xxxxxx X. Xxxxxxx
		Title: Vice President, General Counsel and Secretary

	Heartland Industrial Associates L.L.C.

	By:	/s/ Xxxxxx X. Xxxxxxxx
		Name: Xxxxxx X. Xxxxxxxx
		Title: Managing Member



The foregoing Underwriting Agreement is hereby confirmed and accepted as of the date first above written:

DEUTSCHE BANK SECURITIES INC.

By:	/s/ Xxxxxx X. Xxxxx
	Name: Xxxxxx X. Estey Title: Managing Director




By:	/s/ Xxxxxx xxx Xxxxxxxx
	Name: Isobel van Daesdonk Title: Director

SCHEDULE I



Underwriter	Total Number of Shares to be Purchased	Price Per Share
Deutsche Bank Securities Inc.	1,500,000	$	20.75

Total	1,500,000

SCHEDULE II

Issuer Free Writing Prospectuses:

None.

Schedule III

Signatories to Lock-up Agreements



Selling Stockholder		Total Number of Shares to be Sold
Heartland Industrial Associates L.L.C.(a)		1,500,000

Total		1,500,000

Beneficial Owners, Directors and Executive Officers

Xxxxx X. Xxxxxx

Xxxxxxxx X. Xxxxx

Xxxxxxx X. Xxxxxx

Xxxxxx X. Xxxxxx

Xxxxxx X. Xxxxxxxx

Xxxxxx Xxxxxxx III

A. Xxxx Xxxxxxx

Xxxxxx X. Xxxxxxx

Xxxx X. Xxxxxx

Xxxxxx X. Xxxxxxxx

Xxxxxx X. Xxxxxx

(a) The Selling Stockholder holds the Shares to be sold under this Agreement through one of its funds, Trimas Investment Fund I, L.L.C. (“TIF I”). The Selling Stockholder is the managing member of TIF I. References in this Agreement to “Selling Stockholder” shall also include TIF I. The Selling Stockholder is represented by Sidley Austin LLP, Xxx Xxxxx Xxxxxxxx, Xxxxxxx, Xxxxxxxx 00000.

Annex I(a)

Annex I(b)

Pursuant to Section 9(e) of the Underwriting Agreement, the accountants shall furnish letters to the Underwriter to the effect that:

(i) They are independent certified public accountants with respect to the Company and its subsidiaries within the meaning of the Act and the applicable published rules and regulations thereunder;

(ii) In their opinion, the financial statements and any supplementary schedules examined by them and incorporated by reference in the Prospectus or the Registration Statement comply as to form in all material respects with the applicable accounting requirements of the Act and the related published rules and regulations thereunder; and, if applicable, they have made a review in accordance with standards established by the Public Company Accounting Oversight Board (United States) of the unaudited consolidated interim financial statements of the Company for the periods specified in such letter;

(iii) They have made a review in accordance with standards established by the Public Company Accounting Oversight Board (United States) of the unaudited consolidated statements of income, consolidated balance sheets and consolidated statements of cash flows incorporated by reference in the Prospectus on the basis of specified procedures including inquiries of officials of the Company who have responsibility for financial and accounting matters regarding whether the unaudited consolidated financial statements referred to in paragraph (iv)(A)(i) below comply as to form in all material respects with the applicable accounting requirements of the Act and the related published rules and regulations, nothing came to their attention that cause them to believe that the unaudited consolidated financial statements do not comply as to form in all material respects with the applicable accounting requirements of the Act and the related published rules and regulations;

(iv) On the basis of limited procedures, not constituting an examination in accordance with generally accepted auditing standards, consisting of a reading of the unaudited financial statements and other information referred to below, a reading of the latest available interim financial statements of the Company and its subsidiaries, inspection of the minute books of the Company and its subsidiaries since the date of the latest audited financial statements incorporated by reference in the Prospectus, inquiries of officials of the Company and its subsidiaries responsible for financial and accounting matters and such other inquiries and procedures as may be specified in such letter, nothing came to their attention that caused them to believe that:

(A) (i) the unaudited consolidated statements of income, consolidated balance sheets and consolidated statements of cash flows incorporated by reference in the Prospectus do not comply as to form in all material respects with the applicable accounting requirements of the Act and the related published rules and regulations, or (ii) any material modifications should be made to the unaudited condensed consolidated statements of income, consolidated balance sheets and consolidated statements of cash flows incorporated by reference in the Prospectus for them to be in conformity with generally accepted accounting principles;

(B) any other unaudited income statement data and balance sheet

items included in the Prospectus do not agree with the corresponding items in the unaudited consolidated financial statements from which such data and items were derived, and any such unaudited data and items were not determined on a basis substantially consistent with the basis for the corresponding amounts in the audited consolidated financial statements incorporated by reference in the Prospectus;

(C) as of a specified date not more than three business days prior to the date of such letter, there have been any changes in the consolidated capital stock (other than issuances of capital stock upon exercise of options and stock appreciation rights, upon earn-outs of performance shares and upon conversions of convertible securities, in each case which were outstanding on the date of the latest financial statements included in the Prospectus) or any increase in the consolidated long-term debt of the Company and its subsidiaries, in each case as compared with amounts shown in the latest balance sheet incorporated by reference in the Prospectus, except in each case for changes, increases or decreases which the Prospectus discloses have occurred or may occur or which are described in such letter; and

(v) In addition to the examination referred to in their report(s) incorporated by reference in the Prospectus and the limited procedures, inspection of minute books, inquiries and other procedures referred to in paragraphs (iii) and (iv) above, they have carried out certain specified procedures, not constituting an examination in accordance with generally accepted auditing standards, with respect to certain amounts, percentages and financial information specified by the Underwriter, which are derived from the general accounting records of the Company and its subsidiaries, which appear in the Prospectus, or in Part II of, or in exhibits and schedules to, the Registration Statement specified by the Underwriter, and have compared certain of such amounts, percentages and financial information with the accounting records of the Company and its subsidiaries and have found them to be in agreement unless otherwise indicated.

Annex II(a)

Form of Heartland Lock-Up Agreement

Ladies and Gentlemen:

The undersigned understands that you (the “Underwriter”) propose to enter into an Underwriting Agreement with TriMas Corporation, a Delaware corporation (the “Company”), and the Selling Stockholder named in Schedule III to such agreement, providing for a public offering (the “Offering”) of shares of Common Stock, par value $0.01 per share (the “Shares”), of the Company pursuant to a Registration Statement on Form S-3 (File No. 333-172525), in respect of the Shares, filed with the Securities and Exchange Commission (the “SEC”).

In consideration of the agreement by the Underwriter to offer and sell the Shares, and of other good and valuable consideration the receipt and sufficiency of which are hereby acknowledged, the undersigned agrees that, during the period specified in the following paragraph (the “Lock-Up Period”), the undersigned will not offer, sell, contract to sell, pledge, grant any option to purchase, make any short sale or otherwise dispose of any shares of Common Stock of the Company, or any options or warrants to purchase any shares of Common Stock of the Company, or any securities convertible into, exchangeable for or that represent the right to receive shares of Common Stock of the Company, whether now owned or hereinafter acquired, owned directly by the undersigned (including holding as a custodian) or with respect to which the undersigned has beneficial ownership within the rules and regulations of the SEC (collectively the “Undersigned’s Shares”). The foregoing restriction is expressly agreed to preclude the undersigned from engaging in any hedging or other transaction which is designed to or which reasonably could be expected to lead to or result in a sale or disposition of the Undersigned’s Shares even if such Shares would be disposed of by someone other than the undersigned. Such prohibited hedging or other transactions would include without limitation any short sale or any purchase, sale or grant of any right (including without limitation any put or call option) with respect to any of the Undersigned’s Shares or with respect to any security that includes, relates to, or derives any significant part of its value from such Shares.

The initial Lock-Up Period will commence on the date of this Lock-Up Agreement and continue for 30 days after the public offering date set forth on the final prospectus used to sell the Shares (the “Public Offering Date”) pursuant to the Underwriting Agreement; provided, however, that if (1) during the last 17 days of the initial Lock-Up Period, the Company releases earnings results or announces material news or a material event or (2) prior to the expiration of the initial Lock-Up Period, the Company announces that it will release earnings results during the 15-day period following the last day of the initial Lock-Up Period, then in each case the Lock-Up Period will be automatically extended until the expiration of the 18-day period beginning on the date of release of the earnings results or the announcement of the material news or material event, as applicable, unless the Underwriter waives, in writing, such extension.

The undersigned hereby acknowledges that the Company has agreed in the Underwriting Agreement to provide written notice of any event that would result in an extension of the Lock-Up Period pursuant to the previous paragraph to the undersigned (in accordance with Section 13 of the Underwriting Agreement) and agrees that any such notice properly delivered will be deemed to have been given to, and received by, the undersigned. The undersigned hereby further agrees that, prior to engaging in any

transaction or taking any other action that is subject to the terms of this Lock-Up Agreement during the period from the date of this Lock-Up Agreement to and including the 34th day following the expiration of the initial Lock-Up Period, it will give notice thereof to the Company and will not consummate such transaction or take any such action unless it has received written confirmation from the Company that the Lock-Up Period (as such may have been extended pursuant to the previous paragraph) has expired.

Notwithstanding the foregoing, the undersigned, without giving notice or receipt of written confirmation referred to in the foregoing paragraph, may transfer the Undersigned’s Shares (i) as a bona fide gift or gifts, provided that the donee or donees thereof agree to be bound in writing by the restrictions set forth herein, provided further that any such transaction would not require any public filings or reporting by the undersigned, including filing under Section 13 or Section 16 of the Exchange Act and no such public reports are voluntarily filed by the undersigned, (ii) to any foundation, partnership, limited liability company or trust for the direct or indirect benefit of the undersigned or the immediate family of the undersigned, provided that the foundation, managing partner of the partnership, managing member of the limited liability company, or the trustee of the trust agrees to be bound in writing by the restrictions set forth herein, provided further that any such transfer shall not involve a disposition for value, and provided further that any such transaction would not require any public filings or reporting by the undersigned, including filing under Section 13 or Section 16 of the Exchange Act and no such public reports are voluntarily filed by the undersigned, (iii) with the prior written consent of the Underwriter, or (iv) as required by law, provided that the transferees thereof agree to be bound in writing by the restrictions set forth herein to the extent they are not prohibited by law from doing so, (v) to the extent applicable, as distributions to the direct or indirect members or partners of the undersigned, provided that the transferees thereof agree to be bound in writing by the restrictions set forth herein, and provided further that such distribution would not require any public filings or reporting by the undersigned, including filing under Section 13 or Section 16 of the Exchange Act and no such public reports are voluntarily filed by the undersigned, (vi) to an affiliate (as defined in Rule 12b-2 under the Exchange Act) of the undersigned, provided that any such transaction would not require any public filings or reporting by the undersigned, including filing under Section 13 or Section 16 of the Exchange Act and no such public reports are voluntarily filed by the undersigned, and provided further that such affiliate agrees to be bound in writing by the restrictions set forth herein or (vii) to a nominee or custodian of a person or entity to whom a disposition or transfer would be permissible under clauses (i) through (vi) of this sentence, provided that any such transaction would not require any public filings or reporting by the undersigned, including filing under Section 13 or Section 16 of the Exchange Act and no such public reports are voluntarily filed by the undersigned. For purposes of this Lock-Up Agreement, “immediate family” shall mean any relationship by blood, marriage or adoption, not more remote than first cousin. In addition, notwithstanding the foregoing, if the undersigned is a corporation, the corporation may transfer the capital stock of the Company to any wholly-owned subsidiary of such corporation; provided, however, that in any such case, it shall be a condition to the transfer that the transferee execute an agreement stating that the transferee is receiving and holding such capital stock subject to the provisions of this Agreement and there shall be no further transfer of such capital stock except in accordance with this Agreement, and provided further that any such transfer shall not involve a disposition for value.

The undersigned now has, and, except as contemplated by clauses (i) through (vii) above, for the duration of this Lock-Up Agreement will have, good and marketable title to the Undersigned’s Shares, free and clear of all liens, encumbrances, and claims whatsoever. The undersigned also agrees and consents to the entry of stop transfer instructions with the Company’s transfer agent and registrar against the transfer of the Undersigned’s Shares except in compliance with the foregoing restrictions.

This Lock-Up Agreement shall be governed by, and construed in accordance with, the laws of the State of New York.

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



	Very truly yours,

	Heartland Industrial Associates L.L.C.



	Authorized Signatory



	Title

Annex II(b)

Form of Director and Officer Lock-Up Agreement

Ladies and Gentlemen:

period from the date of this Lock-Up Agreement to and including the 34th day following the expiration of the initial Lock-Up Period, it will give notice thereof to the Company and will not consummate such transaction or take any such action unless it has received written confirmation from the Company that the Lock-Up Period (as such may have been extended pursuant to the previous paragraph) has expired.

Notwithstanding the foregoing, the undersigned, without giving notice or receipt of written confirmation referred to in the foregoing paragraph, may transfer the Undersigned’s Shares (i) as a bona fide gift or gifts, provided that the donee or donees thereof agree to be bound in writing by the restrictions set forth herein, provided further that any such transaction would not require any public filings or reporting by the undersigned, including filing under Section 13 or Section 16 of the Exchange Act and no such public reports are voluntarily filed by the undersigned, (ii) to any foundation, partnership, limited liability company or trust for the direct or indirect benefit of the undersigned or the immediate family of the undersigned, provided that the foundation, managing partner of the partnership, managing member of the limited liability company, or the trustee of the trust agrees to be bound in writing by the restrictions set forth herein, provided further that any such transfer shall not involve a disposition for value, and provided further that any such transaction would not require any public filings or reporting by the undersigned, including filing under Section 13 or Section 16 of the Exchange Act and no such public reports are voluntarily filed by the undersigned, (iii) with the prior written consent of the Underwriter, or (iv) as required by law, provided that the transferees thereof agree to be bound in writing by the restrictions set forth herein to the extent they are not prohibited by law from doing so, (v) to the extent applicable, as distributions to the direct or indirect members or partners of the undersigned, provided that the transferees thereof agree to be bound in writing by the restrictions set forth herein, and provided further that such distribution would not require any public filings or reporting by the undersigned, including filing under Section 13 or Section 16 of the Exchange Act and no such public reports are voluntarily filed by the undersigned, (vi) to an affiliate (as defined in Rule 12b-2 under the Exchange Act) of the undersigned, provided that any such transaction would not require any public filings or reporting by the undersigned, including filing under Section 13 or Section 16 of the Exchange Act and no such public reports are voluntarily filed by the undersigned, and provided further that such affiliate agrees to be bound in writing by the restrictions set forth herein, (vii) upon providing written notice to the Company one business day prior to a transfer or series of transfers and the Company providing its written consent thereto, provided that the number of shares of Common Stock of the Company transferred pursuant to such transfer or series of transfers, when added together with all other shares of Common Stock transferred pursuant to this clause (vii) by the individuals named on Schedule I hereto during the Lock-Up Period, does not exceed 250,000 shares of Common Stock of the Company or (viii) to a nominee or custodian of a person or entity to whom a disposition or transfer would be permissible under clauses (i) through (vii) of this sentence, provided that any such transaction would not require any public filings or reporting by the undersigned, including filing under Section 13 or Section 16 of the Exchange Act and no such public reports are voluntarily filed by the undersigned. For purposes of this Lock-Up Agreement, “immediate family” shall mean any relationship by blood, marriage or adoption, not more remote than first cousin. In addition, notwithstanding the foregoing, if the undersigned is a corporation, the corporation may transfer the capital stock of the Company to any wholly-owned subsidiary of such

corporation; provided, however, that in any such case, it shall be a condition to the transfer that the transferee execute an agreement stating that the transferee is receiving and holding such capital stock subject to the provisions of this Agreement and there shall be no further transfer of such capital stock except in accordance with this Agreement, and provided further that any such transfer shall not involve a disposition for value. The undersigned now has, and, except as contemplated by clauses (i) through (viii) above, for the duration of this Lock-Up Agreement will have, good and marketable title to the Undersigned’s Shares, free and clear of all liens, encumbrances, and claims whatsoever. The undersigned also agrees and consents to the entry of stop transfer instructions with the Company’s transfer agent and registrar against the transfer of the Undersigned’s Shares except in compliance with the foregoing restrictions.

This Lock-Up Agreement shall be governed by, and construed in accordance with, the laws of the State of New York.



	Very truly yours,





	Title

Schedule I

Xxxxxxxx X. Xxxxx

Xxxxxx X. Xxxxxx

Xxxx X. Xxxxxx

Xxxxxxx X. Xxxxxx

Xxxxxx X. Xxxxxx

Xxxxxx X. Xxxxxxx

Xxxxxx X. Xxxxxxxx

Xxxxxx Xxxxxxx III

Xxxxx X. Xxxxxx

Xxxxxx X. Xxxxxxxx

A. Xxxx Xxxxxxx

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TriMas Corporation Common Stock, par value $0.01 per share Underwriting Agreement

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