3,750,000 Shares Western Alliance Bancorporation Common Stock par value $0.0001 per share Underwriting Agreement

Exhibit 1.1

3,750,000 Shares

Common Stock
par value $0.0001 per share

____ __, 2005

Sandler ▇’▇▇▇▇▇ & Partners, L.P.,
As representative of the several Underwriters
named in Schedule I hereto,
▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇▇,
▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇.

Ladies and Gentlemen:

Western Alliance Bancorporation, a Nevada corporation (the “Company”), proposes, subject to the terms and conditions stated herein, to issue and sell to the Underwriters named in Schedule I hereto (the “Underwriters”) an aggregate of 3,750,000 shares (the “Firm Shares”) and, at the election of the Underwriters, up to 500,000 additional shares (the “Optional Shares”) of the common stock, par value $0.0001 per share (“Stock”), of the Company (the Firm Shares and the Optional Shares that the Underwriters elect to purchase pursuant to Section 2 hereof being collectively called the “Shares”).

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

(i) A registration statement on Form S-1 (File No. 333-124406) (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, for each of the other Underwriters, 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 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 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 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 5(a) hereof and deemed by virtue of Rule 430A under the Act to be part of the Initial Registration Statement at the time it was declared 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”; and such final prospectus, in the form first filed pursuant to Rule 424(b) under the Act, is hereinafter called the “Prospectus”);

(ii) No order preventing or suspending the use of any Preliminary 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 an Underwriter through Sandler ▇’▇▇▇▇▇ & Partners, L.P. expressly for use therein (that information being limited to that described in the last sentence of paragraph 8(b) herein);

(iii) The Registration Statement conforms, and the Prospectus 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 the Registration Statement and any amendment thereto, 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 an Underwriter through Sandler ▇’▇▇▇▇▇ & Partners, L.P. expressly for use therein (that information being limited to that described in the last sentence of paragraph 8(b) herein);

(iv) Neither the Company nor any of its subsidiaries has sustained since the date of the latest audited financial statements included in the 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 Prospectus; and, since the respective dates as of which information is given in the Registration Statement and the Prospectus, except as set forth or contemplated in the Prospectus, (A) there has not been any change in the capital stock (other than issuances of common stock pursuant to stock options and warrants granted by the Company or otherwise described in the Registration Statement or Prospectus) 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 (a “Material Adverse Effect”), (B) there have been no transactions entered into by the Company or any of its subsidiaries, other than those in the ordinary course of business, which are material with respect to the Company and its subsidiaries, taken as a whole, and (C) there has been no dividend or distribution of any kind declared, paid or made by the Company on any class of its capital stock;

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

(vi) The Company is a registered bank holding company under the Bank Holding Company Act of 1956, as amended, and has been duly incorporated and is validly existing as a corporation in good standing under the laws of the State of Nevada, with power and authority (corporate and other) to own its properties and conduct its business as described in the 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 where the failure to so qualify or be in good standing does not have, and could not reasonably be expected, individually or in the aggregate, to have, a Material Adverse Effect;

(vii) Each subsidiary of the Company either has been duly incorporated and is validly existing as a corporation or has been duly chartered and is validly existing as a state-chartered bank, in each case in good standing under the laws of the jurisdiction of its organization, with power and authority (corporate and other) to own its properties and conduct its business as described in the 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 where the failure to so qualify or be in good standing does not have, and could not reasonably be expected, individually or in the aggregate, to have, a Material Adverse Effect; the activities of the subsidiaries of the Company (collectively, the “Subsidiaries”) are permitted to subsidiaries of a bank holding company under applicable law and the rules and regulations of the Federal Reserve Board (the “FRB”) set forth in Title 12 of the Code of Federal Regulations; the activities of Subsidiaries that are banks (each, a “Bank,” and collectively, the “Banks”) are permitted under the laws and regulations of their respective jurisdictions of organization and the deposit accounts in the Banks are insured up to the applicable limits by the Federal Deposit Insurance Corporation (the “FDIC”); all of the issued shares of capital stock of each subsidiary of the Company have been duly authorized and validly issued and are fully paid and nonassessable and (except for directors’ qualifying shares) is owned, directly or through other subsidiaries of the Company, by the Company, free and clear of any pledge, lien, encumbrance, claim or equity;

(viii) The Company has an authorized capitalization as set forth in the Prospectus, and all of the issued shares of capital stock of the Company have been duly authorized and validly issued, are fully paid and nonassessable and conform to the description of the capital stock contained in the Prospectus;

(ix) The unissued Shares to be issued and sold by the Company to the Underwriters hereunder have been duly authorized and, when issued and delivered against payment therefor as provided herein, will be validly issued and fully paid and nonassessable and will conform to the description of the capital stock contained in the Prospectus;

(x) Except as described in the Prospectus, (A) there are no outstanding rights (contractual or otherwise), warrants or options to acquire, or instruments convertible into or exchangeable for, or agreements or understandings with respect to the sale or issuance of, any shares of capital stock of or other equity interest in the Company and (B) there are no contracts, agreements or understandings between the Company and any person granting such person the right to require the Company to file a registration statement under the Act or otherwise register any securities of the Company owned or to be owned by such person;

(xi) The issue and sale of the Shares by the Company and the compliance by the Company with all of the provisions of this Agreement and the consummation of the transactions herein contemplated will not conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, any contract, indenture, mortgage, deed of trust, loan agreement, note, lease 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 (collectively, the “Agreements and Instruments”), nor will such action (A) result in any violation of the provisions of the articles of incorporation or by-laws of the Company or any statute or any order, rule or regulation of any federal, state, local or foreign court, arbitrator, regulatory authority or governmental agency or body (each, a “Governmental Entity”) having jurisdiction over the Company or any of its subsidiaries or any of their properties or (B) constitute a Repayment Event (as defined below) under, or result in the creation or imposition of any lien, charge or other encumbrance upon any assets or operations of the Company or any subsidiary pursuant to, any of the Agreements and Instruments; and no consent, approval, authorization, order, registration or qualification of or with any such Governmental Entity is required for the issue and 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 except as may be required under the rules and regulations of the National Association of Securities Dealers, Inc. (“NASD”) 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 Underwriters. As used herein, a “Repayment Event” means any event or condition which gives the holder of any note, debenture or other evidence of indebtedness (or any person acting on such holder’s behalf) the right to require the repurchase, redemption or repayment of all or a portion of such indebtedness by the Company or any subsidiary;

(xii) Neither the Company nor any of its subsidiaries is (A) in violation of its articles of incorporation or charter, as applicable, by-laws or other charter documents or (B) in default in the performance or observance of any material obligation, agreement, covenant or condition contained in any of the Agreements and Instruments;

(xiii) The statements set forth in the Prospectus under the caption “Description of Capital Stock”, insofar as they purport to constitute a summary of the terms of the capital stock of the Company, and under the captions “Supervision and Regulation,” “Management – Director Independence,” “Management – Equity and Benefit Plans” and “Underwriting,” insofar as they purport to describe the provisions of the laws and documents referred to therein, are correct in all material respects and constitute a fair summary thereof;

(xiv) The financial statements included in the Registration Statement and the Prospectus, together with the supporting schedules, if any, and notes, present fairly the consolidated financial condition of the Company and its subsidiaries at the dates indicated and the consolidated results of operations and cash flows of the Company and its subsidiaries for the periods specified. Such financial statements and supporting schedules, if any, have been prepared in conformity with generally accepted accounting principles (“GAAP”) applied on a consistent basis

throughout the periods involved. The financial data and information included in the Registration Statement and the Prospectus present fairly the information shown therein and have been compiled on a basis consistent with that of the audited financial statements included in the Registration Statement and the Prospectus. Pro forma financial statements are not required to be included in the Registration Statement or the Prospectus under the Act, the rules and regulations thereunder or GAAP;

(xv) Each of the Company and its subsidiaries maintains a system of internal accounting controls sufficient to provide reasonable assurance that (i) transactions are executed in accordance with the management’s general or specific authorizations, (ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with GAAP and to maintain asset accountability, (iii) access to assets is permitted only in accordance with the management’s general or specific authorization and (iv) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences;

(xvi) The Company has established and maintains disclosure controls and procedures (as such term is defined in Rule 13a 15(e) and 15d 15(e) under the Securities Exchange Act of 1934, as amended (the ”1934 Act”)). Such disclosure controls and procedures (A) are designed to ensure that material information relating to the Company, including its consolidated subsidiaries, is made known to the Company’s Chief Executive Officer and its Chief Financial Officer by others within those entities to allow timely decisions regarding disclosures, (B) have been evaluated for effectiveness as of the end of the most recent fiscal quarter and (C) are effective to perform the functions for which they were established. The Company’s auditors and the Audit Committee of the Board of Directors of the Company have been advised of (1) any significant deficiencies or material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the Company’s ability to record, process, summarize, and report financial data and (2) any fraud, whether or not material, that involves management or other employees who have a role in the Company’s internal control over financial reporting. Since the date of the most recent evaluation of such disclosure controls and procedures, there have been no changes in internal control over financial reporting that have materially affected, or are reasonably likely to materially affect the Company’s internal control over financial reporting;

(xvii) Neither the Company nor any of its subsidiaries is subject or is party to, or has received any notice or advice that any of them may become subject or party to any investigation with respect to, any corrective, suspension or cease-and-desist order, agreement, consent agreement, memorandum of understanding or other regulatory enforcement action, proceeding or order with or by, or is a party to any commitment letter or similar undertaking to, or is subject to any directive by, or has been a recipient of any supervisory letter from, or has adopted any board resolutions at the request of, any Regulatory Agency (as defined below) that currently relates to or restricts in any material respect the conduct of their business or that in any manner relates to their capital adequacy, credit policies or management (each, a “Regulatory Agreement”), nor has the Company or any of its subsidiaries been advised by any Regulatory Agency that it is considering issuing or requesting any such Regulatory Agreement. There is no unresolved violation, criticism or exception by any Regulatory Agency with respect to any report or statement relating to any examinations of the Company or any of its subsidiaries which, in the reasonable judgment of the Company, is expected to result in a Material Adverse Effect. As used herein, the term “Regulatory Agency” means any Governmental Entity having supervisory or regulatory authority with respect to the Company or any of its subsidiaries, including, but not limited to, any federal or state agency charged with the supervision or regulation of depositary institutions or holding companies of depositary institutions, or engaged in the insurance of depositary institution deposits;

(xviii) Except as disclosed in the Prospectus, the Company and its subsidiaries are conducting their respective businesses in compliance in all material respects with all statutes, laws, rules, regulations, judgments, decisions, directives, orders and decrees of any Governmental Entity (including, without limitation, all regulations and orders of, or agreements with, the FRB and the FDIC) applicable to them;

(xix) Other than as set forth in the Prospectus, there are no legal or governmental actions, suits, investigations or proceedings, including under Environmental Law (as defined below), before or by any Governmental Entity, now pending or, to the knowledge of the Company after due inquiry, threatened or contemplated by Governmental Entities or threatened by others, 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 (A) that are required to be disclosed in the Registration Statement by the Act or by the rules and regulations of the Commission thereunder and not disclosed therein, or (B) which, if determined adversely to the Company or any of its subsidiaries, could reasonably be expected, individually or in the aggregate, to have, a Material Adverse Effect; and there are no contracts or documents of the Company or any of its subsidiaries that are required to be described in the Registration Statement or to be filed as exhibits thereto by the Act or by the rules and regulations of the Commission thereunder which have not been so described and filed;

(xx) The Company and its subsidiaries possess such permits, licenses, approvals, consents and other authorizations, including under Environmental Law (collectively, “Governmental Licenses”), issued by the appropriate federal, state, local or foreign regulatory agencies or bodies necessary to conduct the business now operated by the Company or its subsidiaries, except where the failure to so posses could not reasonably be expected to 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 failures so to comply could not reasonably be expected, individually or in the aggregate, to have a Material Adverse Effect; all of the Governmental Licenses are valid and in full force and effect, except where the invalidity of such Governmental Licenses or the failure of such Governmental Licenses to be in full force and effect would not 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, if the subject of an unfavorable decision, ruling or finding, would result in a Material Adverse Effect;

(xxi) Each of the Company and its subsidiaries is in compliance with all applicable federal, state and local environmental laws and regulations, relating to the use, treatment, storage, handling, disposal, release and management of pollutants, contaminants, hazardous or toxic substances or other substances that may have an adverse effect on human health (collectively, “Hazardous Substances”) or relating to the protection or restoration of the environment or human exposure to Hazardous Substances (each an “Environmental Law”), except where such noncompliance could not reasonably be expected to have a Material Adverse Effect, and to the knowledge of the Company, there are no circumstances that would prevent, interfere with or materially increase the cost of such compliance in the future;

(xxii) To the knowledge of the Company, under applicable law, there are no past or present actions, activities, circumstances, events or incidents, including, without limitation, releases of any material into the environment, that are reasonably likely to form the basis of any claim under any Environmental Law, including common law, against the Company or its subsidiaries which could reasonably be expected to have a Material Adverse Effect;

(xxiii) The statistical and market related data contained in the Prospectus and Registration Statement are based on or derived from sources which the Company reasonably believes are reliable and accurate;

(xxiv) This Agreement has been duly authorized, executed and delivered by the Company and each of the Banks;

(xxv) Neither the Company nor any affiliate of the Company nor any person acting on their behalf has taken, nor will the Company or any affiliate or any person acting on their behalf take, directly or indirectly, any action which is designed to or which has constituted or which would be expected to cause or result in stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Shares;

(xxvi) The Company is not and, after giving effect to the offering and sale of the Shares, will not be an “investment company” or an entity “controlled” by an “investment company”, as such terms are defined in the Investment Company Act of 1940, as amended (the “Investment Company Act”);

(xxvii) Neither the Company nor any of its affiliates does business with the government of Cuba or with any person or affiliate located in Cuba within the meaning of Section 517.075, Florida Statutes;

(xxviii) McGladrey & ▇▇▇▇▇▇, LLP, who have audited the financial statements of the Company and its subsidiaries, included in the Registration Statement and the Prospectus are independent public accountants as required by the Act and the rules and regulations of the Commission thereunder, and registered with the Public Company Accounting Oversight Board;

(xxix) No labor problem or dispute with the employees of the Company or any of its subsidiaries exists or, to the Company’s knowledge, is threatened or imminent, and the Company is not aware of any existing or imminent labor disturbance by the employees of any of its or its subsidiaries’ principal suppliers, contractors or customers, that could have a Material Adverse Effect, whether or not arising from transactions in the ordinary course of business, except as set forth in the Prospectus;

(xxx) The Company and each of its subsidiaries are insured by insurers of recognized financial responsibility against such losses and risks and in such amounts as are prudent and customary in the business in which they are engaged; all policies of insurance insuring the Company or any of its subsidiaries are in full force and effect; the Company and its subsidiaries are in compliance with the terms of such policies and instruments in all material respects; and there are no claims by the Company or any of its subsidiaries under any such policy or instrument as to which any insurance company is denying liability or defending under a reservation of rights clause; neither the Company nor any such subsidiary has been refused any insurance coverage sought or applied for; and neither the Company nor any such subsidiary has any reason to believe that it will not be able to renew its existing insurance coverage as and when such coverage expires or to obtain similar coverage from similar insurers as may be necessary to continue its business at a cost that would not have a Material Adverse Effect, except as set forth or contemplated in the Prospectus;

(xxxi) The Company has filed all foreign, federal, state and local tax returns that are required to be filed or is eligible for, and has requested, extensions thereof, except as set forth or contemplated in the Prospectus and has paid all taxes required to be paid by it and any

other assessment, fine or penalty levied against it, to the extent that any of the foregoing is due and payable, except for any such assessment, fine or penalty that is currently being contested in good faith or as would not have a Material Adverse Effect, except as set forth or contemplated in the Prospectus;

(xxxii) No subsidiary of the Company is currently prohibited, directly or indirectly, from paying any dividends to the Company, from making any other distribution on such subsidiary’s capital stock, from repaying to the Company any loans or advances to such subsidiary from the Company or from transferring any of such subsidiary’s property or assets to the Company or any other subsidiary of the Company, except as set forth or contemplated in the Prospectus;

(xxxiii) Except as would not have a Material Adverse Effect, neither the Company nor any of its subsidiaries: (A) has incurred or expects to incur liability under Title IV of ERISA with respect to any defined benefit pension plan, or under section 412 of ERISA or Section 4971 of the Internal Revenue Code with respect to any pension plan; (B) has obtained a waiver from the minimum funding requirements of the Internal Revenue Code; or (C) has sponsored a plan intended to be qualified under Section 401(a) of the Internal Revenue Code which is not so qualified or with respect to which there is a substantial risk of disqualification;

(xxxiv) The Company and its subsidiaries own, or have valid, binding enforceable and sufficient licenses or other rights to use the patents and patent applications, copyrights, trademarks, service marks, trade names, technology, know-how (including trade secrets and other unpatented and/or unpatentable proprietary rights) and other intellectual property necessary or used in any material respect to conduct their business in the manner in which it is being conducted and in the manner in which it is contemplated as set forth in the Prospectus or otherwise necessary or used in connection with the commercialization of the existing products of the Company and its subsidiaries and the products described in the Prospectus as being under development (collectively, the “Company Intellectual Property”); except as would not have a Material Adverse Effect, the Company Intellectual Property is valid, subsisting and enforceable, and none of the patents owned or licensed by the Company or any of its subsidiaries is unenforceable or invalid, and none of the patent applications owned or licensed by the Company or any of its subsidiaries would be unenforceable or invalid if issued as patents; the Company and its subsidiaries, and to the Company’s knowledge, their licensors, have complied with the duty of candor and disclosure of the U.S. Patent and Trademark Office and any similar foreign intellectual property office (collectively, the “Patent Offices”); neither the Company nor its subsidiaries have infringed or otherwise violated any intellectual property rights of any third person or have breached any contract in connection with which any Company Intellectual Property is provided to the Company and its subsidiaries; neither the Company nor any of its subsidiaries is obligated to pay a royalty, grant a license, or provide other consideration to any third party in connection with the Company Intellectual Property other than as disclosed in the Prospectus; no person has asserted or threatened to assert any claim against, or notified, the Company (or any of its subsidiaries) that (A) the Company or any of its subsidiaries has infringed or otherwise violated any intellectual property rights of any third person, (B) the Company or any of its subsidiaries is in breach or default of any contract under which any Company Intellectual Property is provided, (C) such person will terminate a contract described in clause (B) or adversely alter the scope of the rights provided thereunder or (D) otherwise concerns the ownership, enforceability, validity, scope, registerability, interference, use or the right to use, any Company Intellectual Property (other than a patent office review of pending applications in the ordinary course); to the knowledge of the Company no third party is infringing or otherwise violating any of the Company Intellectual Property owned by the Company or any of its subsidiaries, except as would not reasonably be expected to have a Material Adverse Effect;

(xxxv) Neither the Company nor any of its subsidiaries nor, to the knowledge of the Company after due inquiry, any director, officer, agent, employee or other person associated with or acting on behalf of the Company or any of its subsidiaries has (A) used any corporate funds for any unlawful contribution, gift, entertainment or other unlawful expenses relating to political activity; (B) made any direct or indirect unlawful payment to any foreign or domestic government official or employee; (C) violated or is in violation of any provision of the Foreign Corrupt Practices Act of 1977; (D) made any bribe, rebate, payoff, influence payment, kickback or other unlawful payment; or (E) made any payment of funds to the Company or any of its subsidiaries or received or retained funds in violation of any law, rule or regulation, which payment, receipt or retention of funds is of a character required to be disclosed in the Prospectus, that is not described in the Prospectus as required;

(xxxvi) The operations of the Company and its subsidiaries are and have been conducted at all times in material compliance with applicable financial recordkeeping and reporting requirements of the Currency and Foreign Transactions Reporting Act of 1970, as amended, the money laundering statutes of all jurisdictions, including the Bank Secrecy Act of 1970, as amended by the USA PATRIOT Act, the rules and regulations thereunder (collectively, the “Money Laundering Laws”) and no action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving the Company or any of its subsidiaries with respect to the Money Laundering Laws is pending or, to the knowledge of the Company after due inquiry, threatened;

(xxxvii) The operations of the Company and its subsidiaries are and have been conducted at all times in material compliance with the regulations and requirements of the Office of Foreign Assets Control (“OFAC”);

(xxxviii) The Company and its subsidiaries do not conduct business in any jurisdiction that is the target of economic sanctions administered by OFAC or any jurisdiction designated by the Financial Crimes Enforcement Network as a jurisdiction of primary money laundering concern or any jurisdiction designated as a non-cooperative country or territory in the fight against money laundering by the Financial Actions Task Force;

(xxxix) No relationship, direct or indirect, exists between or among the Company or any of its subsidiaries, on the one hand, and the directors, officers, stockholders, customers or suppliers of the Company or any of its subsidiaries, on the other, that is required by the Act to be described in the Prospectus and that is not so described;

(xl) Except as described in the Prospectus, there are no material off-balance sheet transactions, arrangements, obligations (including contingent obligations), or any other relationships with unconsolidated entities or other persons, that may have a material current or future effect on the Company’s financial condition, changes in financial condition, results of operations, liquidity, capital expenditures, capital resources, or significant components of revenues or expenses;

(xli) There is and has been no failure on the part of the Company or any of the Company’s directors or officers, in their capacities as such, to comply with any provision of the ▇▇▇▇▇▇▇▇-▇▇▇▇▇ Act of 2002 and the rules and regulations promulgated in connection therewith;

(xlii) No consent, approval, authorization or order of, or qualification with, any governmental body or agency, other than those obtained, is required in connection with the offering of the Reserved Shares (as defined in Section 2 below) in any jurisdiction where the

Reserved Shares are being offered. The Company has not offered, or caused the Representative (as defined in Section 5(l) below) to offer, Shares to any person pursuant to the Reserved Share Program (as defined in Section 2 below) with the specific intent to unlawfully influence (i) a customer or supplier of the Company to alter the customer’s or supplier’s level or type of business with the Company or (ii) a trade journalist or publication to write or publish favorable information about the Company or its products;

(xliii) Other than services provided by the Underwriters pursuant to the terms of this Agreement, no member of the National Association of Securities Dealers, Inc. has provided any investment banking, financial advisory and/or consulting services to the Company within the 180-day period immediately preceding the initial filing of the Registration Statement; and

(xliv) The Company’s only, direct and indirect, subsidiaries are as follows: BankWest of Nevada, Alliance Bank of Arizona, ▇▇▇▇▇▇ ▇▇▇▇▇ Bank, ▇▇▇▇▇▇/▇▇▇▇▇▇▇ & Associates, Inc., Premier Trust, Inc. and BW Real Estate, Inc.

2. Subject to the terms and conditions herein set forth, (a) the Company agrees to issue and sell to each of the Underwriters, and each of the Underwriters agrees, severally and not jointly, to purchase from the Company, at a purchase price per share of $___, the number of Firm Shares set forth opposite the name of such Underwriter in Schedule I hereto and (b) in the event and to the extent that the Underwriters shall exercise the election to purchase Optional Shares as provided below, the Company agrees to issue and sell to each of the Underwriters, and each of the Underwriters agrees, severally and not jointly, to purchase from the Company, at the purchase price per share set forth in clause (a) of this Section 2, that portion of the number of Optional Shares as to which such election shall have been exercised (to be adjusted by you so as to eliminate fractional shares) determined by multiplying such number of Optional Shares by a fraction, the numerator of which is the maximum number of Firm Shares which such Underwriter is entitled to purchase as set forth opposite the name of such Underwriter in Schedule I hereto and the denominator of which is the maximum number of Firm Shares that all of the Underwriters are entitled to purchase hereunder.

The Company hereby grants to the Underwriters the right to purchase at their election up to 500,000 Optional Shares, at the purchase price per share set forth in the paragraph above, for the sole purpose of covering overallotments in the sale of the Firm Shares. Any such election to purchase Optional Shares may be exercised only by written notice from you to the Company, given within a period of 30 calendar days after the date of this Agreement, setting forth the aggregate number of Optional Shares to be purchased and the date on which such Optional Shares are to be delivered, as determined by you but in no event earlier than the First Time of Delivery (as defined in Section 4 hereof) or, unless you and the Company otherwise agree in writing, earlier than two or later than ten business days after the date of such notice.

It is understood that each Underwriter has authorized Sandler ▇’▇▇▇▇▇ & Partners, L.P., for such Underwriter’s account, to accept delivery of, receipt for, and make payment of the purchase price for, the Firm Shares and the Optional Shares, if any, which such Underwriter has agreed to purchase. Sandler ▇’▇▇▇▇▇ & Partners, L.P., individually and not as representative of the Underwriters, may (but shall not be obligated to) make payment of the purchase price for the Firm Shares or the Optional Shares, if any, to be purchased by any Underwriter whose funds have not been received by Sandler ▇’▇▇▇▇▇ & Partners, L.P. by the relevant Time of Delivery but such payment shall not relieve such Underwriter from its obligations hereunder.

It is understood that 300,000 shares of the Firm Shares (“Reserved Shares”) have been reserved by the Underwriters for offer and sale to officers, directors, existing stockholders,

employees, business associates and related persons of the Company (“Reserved Share Participants”) upon the terms and conditions set forth in the Prospectus and in accordance with the rules and regulations of the NASD (the “Reserved Share Program”). Under no circumstances will Sandler ▇’▇▇▇▇▇ & Partners, L.P. or any Underwriter be liable to the Company or to any Reserved Share Participant for any action taken or omitted to be taken in good faith in connection with such Reserved Share Program.

3. Upon the authorization by you of the release of the Firm Shares, the several Underwriters propose to offer the Firm Shares for sale upon the terms and conditions set forth in the Prospectus.

4. (a)The Shares to be purchased by each Underwriter hereunder, in definitive form, and in such authorized denominations and registered in such names as Sandler ▇’▇▇▇▇▇ & Partners, L.P. may request upon at least forty-eight hours= prior notice to the Company shall be delivered by or on behalf of the Company to Sandler ▇’▇▇▇▇▇ & Partners, L.P., through the facilities of the Depository Trust Company (“DTC”), for the account of such Underwriter, against payment by or on behalf of such Underwriter of the purchase price therefor by wire transfer of Federal (same day) funds to the account specified by the Company, to Sandler ▇’▇▇▇▇▇ & Partners, L.P. at least forty-eight hours in advance. The Company will cause the certificates representing the Shares to be made available for checking and packaging at least twenty-four hours prior to the Time of Delivery (as defined below) with respect thereto at the office of DTC or its designated custodian (the “Designated Office”). The time and date of such delivery and payment shall be, with respect to the Firm Shares, 9:30 a.m., Eastern Time, on ___, 2005 or such other time and date as Sandler ▇’▇▇▇▇▇ & Partners, L.P. and the Company may agree upon in writing, and, with respect to the Optional Shares, 9:30 a.m., New York time, on the date specified by Sandler ▇’▇▇▇▇▇ & Partners, L.P. in the written notice given by Sandler ▇’▇▇▇▇▇ & Partners, L.P. of the Underwriters= election to purchase such Optional Shares, or such other time and date as Sandler ▇’▇▇▇▇▇ & Partners, L.P. and the Company may agree upon in writing. Such time and date for delivery of the Firm Shares is herein called the “First Time of Delivery”, such time and date for delivery of the Optional Shares, if not the First Time of Delivery, is herein called the “Second Time of Delivery”, and each such time and date for delivery is herein called a “Time of Delivery”.

(b) The documents to be delivered at each Time of Delivery by or on behalf of the parties hereto pursuant to Section 7 hereof, including the cross receipt for the Shares and any additional documents requested by the Underwriters pursuant to Section 7(k) hereof, will be delivered at the offices of Sandler ▇’▇▇▇▇▇ & Partners, L.P., ▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇ (the “Closing Location”), and the Shares will be delivered at the Designated Office, all at such Time of Delivery. A meeting will be held at the Closing Location at p.m., Eastern Time, on the New York Business Day, as defined below, next preceding such 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 4, “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 are generally authorized or obligated by law or executive order to close.

5. The Company agrees with each of the Underwriters:

(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 Prospectus 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 supplement to the Prospectus or any amended Prospectus has been filed and to furnish you with copies thereof; 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 prospectus, 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 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 prospectus or suspending any such qualification, promptly to 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 10:00 a.m., Eastern Time, on the New York Business Day next succeeding the date of this Agreement and from time to time, to furnish the Underwriters with copies of the Prospectus in New York City in such quantities as you may from time to time reasonably request, and, if the delivery of a prospectus 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 is delivered, not misleading, or, if for any other reason it shall be necessary during such period to amend or supplement the Prospectus in order to comply with the Act, to notify you and upon your request to prepare and furnish without charge to each Underwriter and to any dealer in securities as many 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 any Underwriter is required to deliver a prospectus 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 such Underwriter, to prepare and deliver to such Underwriter as many copies as you may request of an amended or supplemented Prospectus complying with Section 10(a)(3) of the Act;

(d) To make generally available to its securityholders as soon as practicable, but in any event not later than eighteen months after the effective date of the Registration Statement (as defined in Rule 158(c) under the Act), an earning 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 thereunder (including, at the option of the Company, Rule 158);

(e) For the period specified below (the “Lock-Up Period”), not to, and not to allow any of its directors, executive officers and certain stockholders identified on Schedule II (and to cause such persons to enter into an agreement to the following effect) to, offer, sell, contract to sell or otherwise dispose of, except as provided hereunder any securities of the Company that are substantially similar to the Shares, including but not limited to any securities that are convertible into

or exchangeable for, or that represent the right to receive, Stock or any such substantially similar securities (other than 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), without the prior written consent of Sandler ▇’▇▇▇▇▇ & Partners, L.P., as representative of the Underwriters (the “Representative”). The initial Lock-Up Period will commence on the date of this Agreement and continue for 180 days after the date of the Prospectus or such earlier date that the Representative consents to in writing; provided, however, that if (1) during the last 17 days of the initial Lock-Up Period, the Company releases earnings results or material news or a material event relating to the Company occurs or (2) prior to the expiration of the initial Lock-Up Period, the Company announces that it will release earnings results during the 16-day period beginning on the last day of the initial Lock-Up Period, then in each case the Lock-Up Period will be extended until the expiration of the 18-day period beginning on the date of release of the earnings results or the occurrence of the materials news or material event, as applicable, unless the Representative waives, in writing, such extension. The Company will provide the Representative with notice of any announcement described in clause (2) of the preceding sentence that gives rise to an extension of the Lock-Up Period;

(f) 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;

(g) During a period of five 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 stockholders, and to deliver to you (i) as soon as 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; and (ii) such additional information concerning the business and financial condition of the Company as you may from time to time reasonably request (such financial statements to be on a consolidated basis to the extent the accounts of the Company and its subsidiaries are consolidated in reports furnished to its stockholders generally or to the Commission);

(h) To (i) comply with all applicable securities and other applicable laws, rules and regulations, including without limitation, the rules and regulations of the National Association of Securities Dealers, Inc. in each jurisdiction in which the Reserved Shares are offered in connection with the Reserved Share Program and (ii) to pay all reasonable fees and disbursements of counsel incurred by the Underwriters in connection with the Reserved Share Program and any stamp duties, similar taxes or duties or other taxes, if any, incurred by the Underwriters in connection with the Reserved Share Program;

(i) To use the net proceeds received by it from the sale of the Shares pursuant to this Agreement in the manner specified in the Prospectus under the caption Use of Proceeds;

(j) If the Company elects to rely on 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;

(k) To use its best efforts to list for quotation the Shares on the New York Stock Exchange (“NYSE”);

(l) During the period beginning on the date hereof and ending on the later of the fifth anniversary of the First Time of Delivery or the date on which the Underwriters receive full payment in satisfaction of any claim for indemnification or contribution to which they may be entitled pursuant to Section 8 of this Agreement, neither the Company nor the Bank shall, without the prior written consent of the Representative, take or permit to be taken any action that could result in the Bank’s common stock becoming subject to any security interest, mortgage, pledge, lien or encumbrance; provided, however, that this covenant shall be null and void if the FRB, FDIC or any other federal or state agency having jurisdiction over the Bank, by regulation, policy statement or interpretive release or by written order or written advice addressed to the Bank and specifically addressing the provisions of Section 8 hereof, permits indemnification of the Underwriters by the Bank as contemplated by such provisions;

(m) To file with the Commission such information on Form 10-K or Form 10-Q as may be required by Rule 463 under the Act;

(n) To engage and maintain at its expense a registrar and transfer agent for the Shares; and

(o) To comply with any of the provisions of any undertaking in the Registration Statement.

6. The Company covenants and agrees with the several Underwriters that the Company will pay or cause to be paid the following: (i) the reasonable out-of-pocket expenses incurred by the Underwriters in connection with the transactions contemplated hereby (regardless of whether the sale of the Shares is consummated), including, without limitation, disbursements, fees and expenses of the Underwriters= counsel and marketing, syndication and travel expenses; (ii) the fees, disbursements and expenses of the Company’s counsel and accountants in connection with the registration of the Shares under the Act and all other expenses in connection with the preparation, printing and filing of the Registration Statement, any Preliminary Prospectus and the Prospectus and amendments and supplements thereto and the mailing and delivering of copies thereof to the Underwriters and dealers; (iii) the cost of printing or producing any Agreement among Underwriters, 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; (iv) all expenses in connection with the qualification of the Shares for offering and sale under state securities laws as provided in Section 5(b) hereof, including the fees and disbursements of counsel for the Underwriters in connection with such qualification and in connection with the Blue Sky survey, and all reasonable fees and disbursements of counsel incurred by the Underwriters in connection with the Reserved Share Program and stamp duties, similar taxes or duties or other taxes, if any, incurred by the Underwriters in connection with the Reserved Share Program; (v) all fees and expenses in connection with listing the Shares on NYSE; (vi) the filing fees incident to, and the fees and disbursements of counsel for the Underwriters in connection with, securing any required review by the National Association of Securities Dealers, Inc. of the terms of the sale of the Shares; (vii) the cost of preparing stock certificates; (viii) the cost and charges of any transfer agent or registrar; (ix) the costs of obtaining all bank regulatory approvals that are or may become necessary as a result of the offering of the Shares; and (x) all other costs and expenses incident to the performance of its obligations hereunder which are not otherwise specifically provided for in this Section.

7. The obligations of the Underwriters hereunder, as to the Shares to be delivered at each Time of Delivery, shall be subject, in their discretion, to the condition that all representations and warranties and other statements of the Company herein are, at and as of such Time of Delivery, true and correct, the condition that the Company 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) within the applicable time period prescribed for such filing by the rules and regulations under the Act and in accordance with Section 5(a) hereof; if the Company has elected to rely upon Rule 462(b), the Rule 462(b) Registration Statement shall have become effective by 10:00 p.m., Eastern 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; and all requests for additional information on the part of the Commission shall have been complied with to your reasonable satisfaction;

(b) Skadden, Arps, Slate, ▇▇▇▇▇▇▇ & ▇▇▇▇ LLP, counsel for the Underwriters, shall have furnished to you such written opinion or opinions, dated such Time of Delivery, with respect to the incorporation of the Company, the validity of the Shares, the Registration Statement, the Prospectus as amended or supplemented and other related matters as you may reasonably request, and such counsel shall have received such opinions, papers and information as they may reasonably request to enable them to pass upon such matters; in rendering such opinion, Skadden, Arps, Slate, ▇▇▇▇▇▇▇ & ▇▇▇▇ LLP may rely as to matters governed by Nevada law upon the opinion of [ ] referred to below;

(c) ▇▇▇▇▇ & ▇▇▇▇▇▇▇ LLP, counsel for the Company, shall have furnished to you their written opinion (a draft of such opinion is attached as Annex I hereto), dated such Time of Delivery, in form and substance satisfactory to you, to the effect set forth in Annex I hereto and to such further effect as counsel to the Underwriters may reasonably request;

(d) [ ], Nevada counsel for the Company, shall have furnished to you their written opinion (a draft of such opinion is attached as Annex II hereto), dated such Time of Delivery, in form and substance satisfactory to you, to the effect set forth in Annex II hereto;

(e) [ ], Arizona counsel for the Company, shall have furnished to you their written opinion (a draft of such opinion is attached as Annex III hereto), dated such Time of Delivery, in form and substance satisfactory to you, to the effect set forth in Annex III hereto;

(f) (i) At the time of execution of this Agreement, (ii) at 9:30 a.m., Eastern Time, on the effective date of any post-effective amendment to the Registration Statement filed subsequent to the date of this Agreement, and (iii) at each Time of Delivery, McGladery & ▇▇▇▇▇▇, LLP shall have furnished to you a letter or letters, dated the respective dates of delivery thereof and in form and substance satisfactory to you, to the effect set forth in Annex IV hereto;

(g) (i) Neither the Company nor any of its subsidiaries shall have sustained since the date of the latest audited financial statements included in the Prospectus any 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 Prospectus, and (ii) since the respective dates as of which information is given in the Prospectus there shall not have been any change in the capital stock (other than issuances of common stock pursuant to stock options and warrants to purchase common stock) or long-term debt of the Company or any of its subsidiaries or any change, or any

development involving a prospective change, in or affecting the general affairs, management, financial position, stockholders’ equity or results of operations of the Company and its subsidiaries, otherwise than as set forth or contemplated in the Prospectus, the effect of which, in any such case described in Clause (i) or (ii), is in the judgment of the Representative so material and adverse as to make it impracticable or inadvisable to proceed with the public offering or the delivery of the Shares being delivered at such Time of Delivery on the terms and in the manner contemplated in the Prospectus;

(h) On or after the date hereof there shall not have occurred any of the following: (i) a suspension or material limitation in trading in securities generally on the NYSE or on the National Market of the National Association of Securities Dealers Automated Quotations System; (ii) a suspension or material limitation in trading in the Company=s securities on the NYSE; (iii) a general moratorium on commercial banking activities declared by either Federal or New York or Nevada State authorities; or (iv) the outbreak or escalation of hostilities involving the United States or the declaration by the United States of a national emergency or war or a material adverse change in general economic, political or financial conditions, including without limitation as a result of terrorist activities after the date hereof (or the effect of international conditions on the financial markets in the United States shall be such), or any other calamity or crisis, if the effect of any such event specified in this Clause (iv) in the judgment of the Representative makes it impracticable or inadvisable to proceed with the public offering or the delivery of the Shares being delivered at such Time of Delivery on the terms and in the manner contemplated in the Prospectus;

(i) The Shares to be sold at such Time of Delivery shall have been duly listed for quotation on NYSE;

(j) The National Association of Securities Dealers, Inc. shall not have raised any objection with respect to the fairness and reasonableness of the underwriting terms and arrangements;

(k) The Company has obtained and delivered to the Underwriters executed copies of an agreement from the directors, executive officers and certain stockholders listed on Schedule II hereto, substantially to the effect set forth in Subsection 5(e) hereof in form and substance satisfactory to you;

(l) The Company shall have complied with the provisions of Section 5(c) hereof with respect to the furnishing of prospectuses on the New York Business Day next succeeding the date of this Agreement;

(m) The Company shall have furnished or caused to be furnished to you at such Time of Delivery certificates of officers of the Company satisfactory to you as to the accuracy of the representations and warranties of the Company herein at and as of such Time of Delivery, as to the performance by the Company of all of its obligations hereunder to be performed at or prior to such Time of Delivery, as to the matters set forth in subsections (a) and (e) of this Section and as to such other matters as you may reasonably request; and

(n) Each Bank shall have furnished or caused to be furnished to you at such Time of Delivery certificates of officers of the Bank satisfactory to you as to the accuracy of the representations and warranties of the Bank herein at and as of such Time of Delivery, as to the performance by the Bank of all of its obligations hereunder to be performed at or prior to such Time of Delivery and as to such other matters as you may reasonably request.

8. (a) The Company and the Banks, jointly and severally, will indemnify and hold harmless each Underwriter against any losses, claims, damages or liabilities, joint or several, to which such 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 (A) any breach of any representation, warranty or covenant of the Company or the Banks contained herein, (B) an untrue statement or alleged untrue statement of a material fact contained in any Preliminary Prospectus, the Registration Statement or the Prospectus, or any amendment or supplement thereto, or (C) the omission or alleged omission to state a material fact required to be stated in any such Preliminary Prospectus, the Registration Statement or the Prospectus, or any amendment or supplement thereto or any such Application or necessary to make the statements therein not misleading or (D) the ▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ v. ▇▇▇▇ ▇▇▇▇▇▇▇, et al (Case No. 2:02-CV-1244) lawsuit filed in the United States District Court for the Central District of Utah and any matters related to, arising out of, or connected with such lawsuit, including without limitation, ▇▇▇▇ ▇. ▇▇▇▇▇▇▇’ fee arrangement or other agreements with the attorneys representing him in connection with such matters, and will reimburse each Underwriter for any legal or other expenses reasonably incurred by such Underwriter in connection with investigating or defending any such action or claim as such expenses are incurred; provided, however, that neither the Company nor the Banks shall 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 any Preliminary Prospectus, the Registration Statement or the Prospectus or any such amendment or supplement in reliance upon and in conformity with written information furnished to the Company by any Underwriter through Sandler ▇’▇▇▇▇▇ & Partners, L.P. expressly for use therein (that information being limited to that described in the last sentence of paragraph 8(b) herein). Notwithstanding the foregoing, the indemnification provided for in this paragraph (a) shall not apply to the Banks to the extent that such indemnification by the Banks is found in a final judgment by a court of competent jurisdiction to constitute a covered transaction under Section 23A of the Federal Reserve Act.

In addition, the Company and the Banks, jointly and severally, will indemnify and hold harmless each Underwriter against any losses, claims, damages or liabilities, joint or several, to which such 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 (A) any untrue statement or alleged untrue statement of a material fact contained in any material prepared by or with the consent of the Company for distribution to Reserved Share Participants in connection with the Reserved Share Program, or any omission or alleged omission to state therein a 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; (B) the failure of any Reserved Share Participant to receive Reserved Shares for which such Reserved Share Participant submitted an indication of interest; (C) the failure of any Reserved Share Participant to pay for and accept delivery of Reserved Shares which, by the end of the second business day following the date of this Agreement, were subject to a properly confirmed agreement to purchase; or (D) the Reserved Share Program (other than as a result of willful misconduct or bad faith by the Underwriters).

(b) Each Underwriter will indemnify and hold harmless the Company against any losses, claims, damages or liabilities to which 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 any Preliminary Prospectus, the Registration Statement or the Prospectus, or any amendment or supplement thereto, 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 any

Preliminary Prospectus, the Registration Statement or the Prospectus or any such amendment or supplement in reliance upon and in conformity with written information furnished to the Company by such Underwriter through Sandler ▇’▇▇▇▇▇ & Partners, L.P. expressly for use therein; and will reimburse the Company for any legal or other expenses reasonably incurred by the Company in connection with investigating or defending any such action or claim as such expenses are incurred. The sixth paragraph and the first sentence of the twelfth paragraph under the caption “Underwriting” in the Prospectus and corresponding information in the Preliminary Prospectus and the Registration Statement (to the extent such statements relate to the Underwriters) constitute the only information furnished by or on behalf of any Underwriter through Sandler ▇’▇▇▇▇▇ & Partners, L.P. for purposes of Section 1(ii) and 1(iii) and this Section 8(a) and this Section 8(b).

(c) Promptly after receipt by an indemnified party under subsection (a) or (b) 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 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 any 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.

(d) If the indemnification provided for in this Section 8 is unavailable to or insufficient to hold harmless an indemnified party under subsection (a) or (b) 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 on the one hand and the Underwriters 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 (c) 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 on the one hand and the Underwriters 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 on the one hand and the Underwriters 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 Company bear to the total underwriting discounts and commissions received by the Underwriters, in each case as set forth in

the table on the cover page of the Prospectus. 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 on the one hand or the Underwriters on the other and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. The Company and the Underwriters agree that it would not be just and equitable if contributions pursuant to this subsection (d) were determined by pro rata allocation (even if the Underwriters were treated as one entity for such purpose) or by any other method of allocation which does not take account of the equitable considerations referred to above in this subsection (d). 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 (d) 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 (d), no Underwriter shall be required to contribute any amount in excess of the amount by which the total price at which the Shares underwritten by it and distributed to the public were offered to the public exceeds the amount of any damages which such Underwriter has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The Underwriters’ obligations in this subsection (d) to contribute are several in proportion to their respective underwriting obligations and not joint.

(e) The obligations of the Company and the Banks under this Section 8 shall be in addition to any liability which the Company and the Banks may otherwise have and shall extend, upon the same terms and conditions, to each person, if any, who controls any Underwriter within the meaning of the Act or who is an affiliate, partner, director, officer, employee or agent of any Underwriter; and the obligations of the Underwriters under this Section 8 shall be in addition to any liability which the respective Underwriters may otherwise have and shall extend, upon the same terms and conditions, to each officer and director of the Company or any of the Banks, as the case may be, and to each other person, if any, who controls the Company or any of the Banks, as the case may be, within the meaning of the Act or who is an affiliate of the Company or any of the Banks, as the case may be.

9. (a) If any Underwriter shall default in its obligation to purchase the Shares which it has agreed to purchase hereunder at a Time of Delivery, you may in your discretion arrange for you or another party or other parties to purchase such Shares on the terms contained herein. If within thirty-six hours after such default by any Underwriter you do not arrange for the purchase of such Shares, then the Company shall be entitled to a further period of thirty-six hours within which to procure another party or other parties satisfactory to you to purchase such Shares on such terms. In the event that, within the respective prescribed periods, you notify the Company that you have so arranged for the purchase of such Shares, or the Company notifies you that it has so arranged for the purchase of such Shares, you or the Company shall have the right to postpone such Time of Delivery for a period of not more than seven days, in order to effect whatever changes may thereby be made necessary in the Registration Statement or the Prospectus, or in any other documents or arrangements, and the Company agrees to file promptly any amendments to the Registration Statement or the Prospectus which in your opinion may thereby be made necessary. The term “Underwriter” as used in this Agreement shall include any person substituted under this Section with like effect as if such person had originally been a party to this Agreement with respect to such Shares.

(b) If, after giving effect to any arrangements for the purchase of the Shares of a defaulting Underwriter or Underwriters by you and the Company as provided in subsection (a) above, the aggregate number of such Shares which remains unpurchased does not exceed one-tenth of the aggregate number of all the Shares to be purchased at such Time of Delivery, then the Company shall have the right to require each non-defaulting Underwriter to purchase the number of shares which such Underwriter agreed to purchase hereunder at such Time of Delivery and, in addition, to require each non-defaulting Underwriter to purchase its pro rata share (based on the number of Shares which such Underwriter agreed to purchase hereunder) of the Shares of such defaulting Underwriter or Underwriters for which such arrangements have not been made; but nothing herein shall relieve a defaulting Underwriter from liability for its default.

(c) If, after giving effect to any arrangements for the purchase of the Shares of a defaulting Underwriter or Underwriters by you and the Company as provided in subsection (a) above, the aggregate number of such Shares which remains unpurchased exceeds one-tenth of the aggregate number of all the Shares to be purchased at such Time of Delivery, or if the Company shall not exercise the right described in subsection (b) above to require non-defaulting Underwriters to purchase Shares of a defaulting Underwriter or Underwriters, then this Agreement (or, with respect to the Second Time of Delivery, the obligations of the Underwriters to purchase and of the Company to sell the Optional Shares) shall thereupon terminate, without liability on the part of any non-defaulting Underwriter or the Company, except for the expenses to be borne by the Company as provided in Section 6 hereof and the indemnity and contribution agreements in Section 8 hereof; but nothing herein shall relieve a defaulting Underwriter from liability for its default.

10. The respective indemnities, agreements, representations, warranties and other statements of the Company, the Banks and the several Underwriters, 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 any Underwriter or any controlling person of any Underwriter, or the Company, or any officer or director or controlling person of the Company, and shall survive delivery of and payment for the Shares.

11. If this Agreement shall be terminated pursuant to Section 9 hereof, neither the Company nor any of the Banks shall then be under any liability to any Underwriter except as provided in Sections 6 (in the case of the Company) and 8 (in the case of the Company and the Banks) hereof; but, if for any other reason, any Shares are not delivered by or on behalf of the Company as provided herein, the Company will reimburse the Underwriters through you for all out-of-pocket expenses, including fees and disbursements of counsel, incurred by the Underwriters in connection with the transactions contemplated hereby, including, without limitation, marketing, syndication and travel expenses incurred by the Underwriters in making preparations for the purchase, sale and delivery of the Shares not so delivered, but the Company shall then be under no further liability to any Underwriter except as provided in Sections 6 and 8 hereof.

12. In all dealings hereunder, you shall act on behalf of each of the Underwriters, and the parties hereto shall be entitled to act and rely upon any statement, request, notice or agreement on behalf of any Underwriter made or given by you.

All statements, requests, notices and agreements hereunder shall be in writing, and if to the Underwriters shall be delivered or sent by mail, telex or facsimile transmission to you as the representative at ▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇, ▇^▇▇ ▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇, Attention: General Counsel; and if to the Company or to the Banks shall be delivered or sent by mail to the address of the Company set forth in the Registration Statement, Attention: ▇▇▇▇▇▇ ▇▇▇▇▇▇, President and Chief

Executive Officer (with a copy to ▇▇▇▇▇▇ ▇. ▇▇▇▇▇, Esq., ▇▇▇▇▇ & ▇▇▇▇▇▇▇ L.L.P., ▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇, ▇.▇., ▇▇▇▇▇▇▇▇▇▇, ▇.▇. 20004); provided, however, that any notice to an Underwriter pursuant to Section 8(c) hereof shall be delivered or sent by mail, telex or facsimile transmission to such Underwriter at its address set forth in its Underwriters’ Questionnaire, or telex constituting such Questionnaire, which address will be supplied to the Company by you upon request. Any such statements, requests, notices or agreements shall take effect upon receipt thereof.

13. This Agreement shall be binding upon, and inure solely to the benefit of, the Underwriters, the Company, the Banks and, to the extent provided in Sections 8 and 10 hereof, the officers and directors of the Company and of the Bank and each person who controls the Company, any Bank or any 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 any Underwriter shall be deemed a successor or assign by reason merely of such purchase.

14. 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.

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

16. 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.

[Signature Page Follows]

If the foregoing is in accordance with your understanding, please sign and return to us four counterparts hereof, and upon the acceptance hereof by you, on behalf of each of the Underwriters, this letter and such acceptance hereof shall constitute a binding agreement among each of the Underwriters, the Company and the Banks. It is understood that your acceptance of this letter on behalf of each of the Underwriters is pursuant to the authority set forth in a form of Agreement among Underwriters, the form of which shall be submitted to the Company for examination upon request, but without warranty on your part as to the authority of the signers thereof.


		Very truly yours,

		Western Alliance Bancorporation
		By:

		Name:
		Title:

		BankWest of Nevada

		By:

		Name:
		Title:

		Alliance Bank of Arizona

		By:

		Name:
		Title:

		▇▇▇▇▇▇ ▇▇▇▇▇ Bank

		By:

		Name:
		Title:

Accepted as of the date hereof:

Sandler ▇’▇▇▇▇▇ & Partners, L.P.
As representative of the several Underwriters


By:		Sandler ▇’▇▇▇▇▇ & Partners Corp. the sole general partner
By:

		Name:
		Title: Vice President

SCHEDULE I


		Number of Optional
		Shares to be
	Total Number of	Purchased if
	Firm Shares	Maximum Option
Underwriter	to be Purchased	Exercised
Sandler ▇’▇▇▇▇▇ & Partners, ▇.▇.

▇▇▇▇▇, ▇▇▇▇▇▇▇▇ & ▇▇▇▇▇


Total

SCHEDULE II

▇▇▇▇▇▇ ▇▇▇▇▇▇
▇▇▇▇ ▇▇▇▇
▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇
▇▇▇▇▇▇▇ ▇▇▇▇
▇▇▇▇ ▇▇▇▇▇
▇▇▇▇▇ Beach
▇▇▇▇▇▇▇ ▇. ▇▇▇▇
▇▇▇▇ ▇▇▇▇▇▇▇
▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇
▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇
▇▇▇▇▇ ▇▇▇▇▇
▇▇▇▇ ▇▇▇▇
▇▇▇▇▇ ▇▇▇▇▇
▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇
▇▇▇▇ ▇▇▇▇▇▇▇▇
M. ▇▇▇▇▇▇ ▇▇▇▇
▇▇▇▇▇ ▇. ▇▇▇▇
▇▇▇▇▇▇ ▇▇▇▇▇
▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇
▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇

3,750,000 Shares Western Alliance Bancorporation Common Stock par value $0.0001 per share Underwriting Agreement

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