WESTERN ALLIANCE BANCORPORATION 2002 STOCK OPTION PLAN STOCK OPTION AWARD AGREEMENT

Exhibit 10.5

WESTERN ALLIANCE BANCORPORATION 2002 STOCK OPTION PLAN

STOCK OPTION AWARD AGREEMENT

     1. Grant of Option. You (the “Grantee”) have been granted an option (the “Option”) to purchase the Total Number of Shares of Common Stock subject to the Option (the “Shares”) at the Exercise Price per Share (the “Exercise Price”) set forth above, subject to the terms and conditions of this Stock Option Award Agreement (the “Option Agreement”) and terms and conditions of the Western Alliance Bancorporation 2002 Stock Option Plan, as amended from time to time (the “Plan”), which are incorporated herein by reference. Unless otherwise defined herein, the terms defined in the Plan shall have the same defined meanings in this Option Agreement.

     If designated above as an Incentive Stock Option, the Option is intended to qualify as an Incentive Stock Option as defined in Section 422 of the Code. However, notwithstanding such designation, to the extent that the aggregate Fair Market Value of Shares subject to Options designated as Incentive Stock Options which become exercisable for the first time by the Grantee during any calendar year (under all plans of the Company or any Parent or Subsidiary of the Company) exceeds $100,000, such excess Options, to the extent of the Shares covered thereby in excess of the foregoing limitation, shall be treated as Non-Qualified Stock Options. For this purpose, Incentive Stock Options shall be taken into account in the order in which they were

1

granted, and the Fair Market Value of the Shares shall be determined as of the date the Option with respect to such Shares is awarded.

     2. Vesting.

          (a) Vesting Schedule. Subject to the Grantee’s Continuous Service and other limitations set forth in this Option Agreement and the Plan, the Option may be exercised, in whole or in part, in accordance with the following schedule: 20% of the Shares subject to the Option shall vest twelve (12) months after the Vesting Commencement Date, and an additional 20% of the Shares subject to the Option shall vest on each anniversary of the Vesting Commencement Date thereafter.

          (b) Leave of Absence. During any authorized leave of absence, the vesting of the Option as provided in Section 2(a) of this Option Agreement shall be suspended after the leave of absence exceeds a period of ninety (90) days. Vesting of the Option shall resume upon the Grantee’s termination of the leave of absence and return to service to the Company or a Related Entity. The Vesting Schedule of the Option shall be extended by the length of the suspension.

          (c) Termination for Cause. In the event of termination of the Grantee’s Continuous Service for Cause, the Grantee’s right to exercise the Option shall terminate concurrently with the termination of the Grantee’s Continuous Service, except as otherwise determined by the Administrator.

          (d) Change in Status. In the event of the Grantee’s change in status from an Employee whose customary employment is 20 hours or more per week to an Employee whose customary employment is fewer than 20 hours per week, vesting of the Option shall continue only to the extent determined by the Administrator as of such change in status consistent with any minimum vesting requirements set forth in the Plan. In the event of the Grantee’s change in status from Employee to Consultant, vesting of the Option shall cease as of such change in status unless otherwise determined by the Administrator.

     3. Exercise of Option.

          (a) Right to Exercise. The Option shall be exercisable during its term in accordance with the Vesting Schedule set out in Section 2(a) of this Option Agreement and with the applicable provisions of the Plan and this Option Agreement. The Option shall be subject to the provisions of Section 11 of the Plan relating to the exercisability or termination of the Option in the event of a Corporate Transaction or Change in Control. The Grantee shall be subject to reasonable limitations on the number of requested exercises during any monthly or weekly period as determined by the Administrator. In no event shall the Company issue fractional Shares.

          (b) Method of Exercise. The Option shall be exercisable by delivery of an exercise notice (a form of which is attached as Exhibit A) or by such other procedure as specified from time to time by the Administrator which shall state the election to exercise the Option, the whole number of Shares in respect of which the Option is being exercised, and such other provisions as may be required by the Administrator. The exercise notice shall be delivered in

2

person, by certified mail, or by such other method (including electronic transmission) as determined from time to time by the Administrator to the Company accompanied by payment of the Exercise Price. The Option shall be deemed to be exercised upon receipt by the Company of such notice accompanied by the Exercise Price, which, to the extent selected, shall be deemed to be satisfied by use of the broker-dealer sale and remittance procedure to pay the Exercise Price provided in Section 5(d), below.

          (c) Taxes. No Shares will be delivered to the Grantee or other person pursuant to the exercise of the Option until the Grantee or other person has made arrangements acceptable to the Administrator for the satisfaction of applicable income tax and employment tax withholding obligations, including, without limitation, such other tax obligations of the Grantee incident to the receipt of Shares or the disqualifying disposition of Shares received on exercise of an Incentive Stock Option. Upon exercise of the Option, the Company or the Grantee’s employer may offset or withhold (from any amount owed by the Company or the Grantee’s employer to the Grantee) or collect from the Grantee or other person an amount sufficient to satisfy such tax obligations and/or the employer’s withholding obligations. In the case of an Incentive Stock Option, the Grantee agrees, as partial consideration for the designation of the Option as an Incentive Stock Option, to notify the Company in writing within thirty (30) days of any disposition of any shares acquired by exercise of the Option if such disposition occurs within two (2) years from the Date of Award or within one (1) year from the date the Shares were transferred to the Grantee. If the Company is required to satisfy any federal, state or local income or employment tax withholding obligations as a result of such an early disposition, the Grantee agrees to satisfy the amount of such withholding in a manner that the Administrator prescribes.

     4. ▇▇▇▇▇▇▇’s Representations. The Grantee understands that neither the Option nor the Shares exercisable pursuant to the Option have been registered under the Securities Act of 1933, as amended or any United States securities laws. In the event the Shares purchasable pursuant to the exercise of the Option have not been registered under the Securities Act of 1933, as amended, at the time the Option is exercised, the Grantee shall, if requested by the Company, concurrently with the exercise of all or any portion of the Option, deliver to the Company an investment representation statement in a form determined by the Administrator.

     5. Method of Payment. Payment of the Exercise Price shall be made by any of the following, or a combination thereof, at the election of the Grantee; provided, however, that such exercise method does not then violate any Applicable Law:

          (a) cash;

          (b) check;

          (c) if the exercise occurs on or after the Registration Date, surrender of Shares or delivery of a properly executed form of attestation of ownership of Shares as the Administrator may require (including withholding of Shares otherwise deliverable upon exercise of the Option) which have a Fair Market Value on the date of surrender or attestation equal to the aggregate Exercise Price of the Shares as to which the Option is being exercised (but only to the extent that

3

such exercise of the Option would not result in an accounting compensation charge with respect to the Shares used to pay the exercise price); or

          (d) if the exercise occurs on or after the Registration Date, payment through a broker-dealer sale and remittance procedure pursuant to which the Grantee (i) shall provide written instructions to a Company-designated brokerage firm to effect the immediate sale of some or all of the purchased Shares and remit to the Company, out of the sale proceeds available on the settlement date, sufficient funds to cover the aggregate exercise price payable for the purchased Shares and (ii) shall provide written directives to the Company to deliver the certificates for the purchased Shares directly to such brokerage firm in order to complete the sale transaction.

     6. Restrictions on Exercise. The Option may not be exercised if the issuance of the Shares subject to the Option upon such exercise would constitute a violation of any Applicable Laws.

     7. Termination or Change of Continuous Service. In the event the Grantee’s Continuous Service terminates, other than for Cause, the Grantee may, but only during the Post-Termination Exercise Period, exercise the portion of the Option that was vested at the date of such termination (the “Termination Date”). In the event of termination of the Grantee’s Continuous Service for Cause, the Grantee’s right to exercise the Option shall, except as otherwise determined by the Administrator, terminate concurrently with the termination of the Grantee’s Continuous Service (also the “Termination Date”). In no event shall the Option be exercised later than the Expiration Date set forth in this Option Agreement. In the event of the Grantee’s change in status from Employee or Director to any other status of Employee, Director or Consultant, the Option shall remain in effect and vesting of the Option shall cease as of such change in status unless otherwise determined by the Administrator or dictated by any minimum vesting requirements set forth in the Plan; provided, however, with respect to any Incentive Stock Option that shall remain in effect after a change in status from Employee to Director, such Incentive Stock Option shall cease to be treated as an Incentive Stock Option and shall be treated as a Non-Qualified Stock Option on the day three (3) months and one (1) day following such change in status. Except as provided in Sections 8 and 9 below, to the extent that the Option was unvested on the Termination Date, or if the Grantee does not exercise the vested portion of the Option within the Post-Termination Exercise Period, the Option shall terminate.

     8. Disability of Grantee. In the event the Grantee’s Continuous Service terminates as a result of his or her Disability, the Grantee may, but only within six (6) months from the Termination Date (and in no event later than the Expiration Date), exercise the portion of the Option that was vested on the Termination Date; provided, however, that if such Disability is not a “disability” as such term is defined in Section 22(e)(3) of the Code and the Option is an Incentive Stock Option, such Incentive Stock Option shall cease to be treated as an Incentive Stock Option and shall be treated as a Non-Qualified Stock Option on the day three (3) months and one (1) day following the Termination Date. To the extent that the Option was unvested on the Termination Date, or if the Grantee does not exercise the vested portion of the Option within the time specified herein, the Option shall terminate. Section 22(e)(3) of the Code provides that an individual is permanently and totally disabled if he or she is unable to engage in any

4

substantial gainful activity by reason of any medically determinable physical or mental impairment which can be expected to result in death or which has lasted or can be expected to last for a continuous period of not less than twelve (12) months.

     9. Death of Grantee. In the event of the termination of the Grantee’s Continuous Service as a result of his or her death, or in the event of the Grantee’s death during the Post-Termination Exercise Period or during the six (6) month period following the Grantee’s termination of Continuous Service as a result of his or her Disability, the Grantee’s estate, or a person who acquired the right to exercise the Option by bequest or inheritance, may exercise the portion of the Option that was vested at the date of termination, within twelve (12) months from the date of death (but in no event later than the Expiration Date). To the extent that the Option was unvested on the date of death, or if the vested portion of the Option is not exercised within the time specified herein, the Option shall terminate.

     10. Transferability of Option. The Option may not be transferred in any manner other than by will or by the laws of descent and distribution and may be exercised during the lifetime of the Grantee only by the Grantee. The terms of the Option shall be binding upon the executors, administrators, heirs and successors of the Grantee.

     11. Term of Option. The Option must be exercised no later than the Expiration Date set forth in this Option Agreement or such earlier date as otherwise provided herein. After the Expiration Date or such earlier date, the Option shall be of no further force or effect and may not be exercised.

     12. Company’s Right of First Refusal.

          (a) Transfer Notice. Neither the Grantee nor a transferee (either being sometimes referred to herein as the “Holder”) shall sell, hypothecate, encumber or otherwise transfer any Shares or any right or interest therein without first complying with the provisions of this Section 12 or obtaining the prior written consent of the Company. In the event the Holder desires to accept a bona fide third-party offer for any or all of the Shares, the Holder shall provide the Company with written notice (the “Transfer Notice”) of:

               (i) The Holder’s intention to transfer;

               (ii) The name of the proposed transferee;

               (iii) The number of Shares to be transferred; and

               (iv) The proposed transfer price or value and terms thereof.

          (b) First Refusal Exercise Notice. The Company shall have the right to purchase (the “Right of First Refusal”) all but not less than all, of the Shares which are described in the Transfer Notice (the “Offered Shares”) at any time during the period commencing upon receipt of the Transfer Notice and ending twenty (20) days after the first date on which the Company determines that the Right of First Refusal may be exercised without incurring an accounting expense with respect to such exercise (the “Option Period”) at (i) the per share price or value and

5

in accordance with the terms stated in the Transfer Notice (subject to Section 12(c) below) or (ii) the Fair Market Value of the Shares on the date on which the purchase is to be effected if no consideration is paid pursuant to the terms stated in the Transfer Notice, which Right of First Refusal shall be exercised by written notice (the “First Refusal Exercise Notice”) to the Holder.

          (c) Payment Terms. The Company shall consummate the purchase of the Offered Shares on the terms set forth in the Transfer Notice within 30 days after delivery of the First Refusal Exercise Notice; provided, however, that in the event the Transfer Notice provides for the payment for the Offered Shares other than in cash, the Company and/or its assigns shall have the right to pay for the Offered Shares by the discounted cash equivalent of the consideration described in the Transfer Notice as reasonably determined by the Administrator. Upon payment for the Offered Shares to the Holder or into escrow for the benefit of the Holder, the Company or its assigns shall become the legal and beneficial owner of the Offered Shares and all rights and interest therein or related thereto, and the Company shall have the right to transfer the Offered Shares to its own name or its assigns without further action by the Holder.

          (d) Assignment. Whenever the Company shall have the right to purchase Shares under this Right of First Refusal, the Company may designate and assign one or more employees, officers, directors or stockholders of the Company or other persons or organizations, to exercise all or a part of the Company’s Right of First Refusal.

          (e) Non-Exercise. If the Company and/or its assigns do not collectively elect to exercise the Right of First Refusal within the Option Period or such earlier time if the Company and/or its assigns notifies the Holder that it will not exercise the Right of First Refusal, then the Holder may transfer the Shares upon the terms and conditions stated in the Transfer Notice, provided that:

               (i) The transfer is made within 90 days of the earlier of (A) the date the Company and/or its assigns notify the Holder that the Right of First Refusal will not be exercised or (B) the expiration of the Option Period; and

               (ii) The transferee agrees in writing that such Shares shall be held subject to the provisions of this Option Agreement.

               (f) Expiration of Transfer Period. Following such 90-day period, no transfer of the Offered Shares and no change in the terms of the transfer as stated in the Transfer Notice (including the name of the proposed transferee) shall be permitted without a new written Transfer Notice prepared and submitted in accordance with the requirements of this Right of First Refusal.

               (g) Termination of Right of First Refusal. The provisions of this Right of First Refusal shall terminate as to all Shares upon the Registration Date.

               (h) Additional Shares or Substituted Securities. In the event of any transaction described in Sections 10 or 11 of the Plan, any new, substituted or additional securities or other property which is by reason of any such transaction distributed with respect to the Shares shall be

6

immediately subject to the Right of First Refusal, but only to the extent the Shares are at the time covered by such right.

     13. Stop-Transfer Notices. In order to ensure compliance with the restrictions on transfer set forth in this Option Agreement or the Plan, the Company may issue appropriate “stop transfer” instructions to its transfer agent, if any, and, if the Company transfers its own securities, it may make appropriate notations to the same effect in its own records.

     14. Refusal to Transfer. The Company shall not be required (i) to transfer on its books any Shares that have been sold or otherwise transferred in violation of any of the provisions of this Option Agreement or (ii) to treat as owner of such Shares or to accord the right to vote or pay dividends to any purchaser or other transferee to whom such Shares shall have been so transferred.

     15. Tax Consequences. Set forth below is a brief summary as of the date of this Option Agreement of some of the federal tax consequences of exercise of the Option and disposition of the Shares. THIS SUMMARY IS NECESSARILY INCOMPLETE, AND THE TAX LAWS AND REGULATIONS ARE SUBJECT TO CHANGE. THE GRANTEE UNDERSTANDS THAT THE GRANTEE MAY SUFFER ADVERSE TAX CONSEQUENCES AS A RESULT OF THE GRANTEE’S PURCHASE OR DISPOSITION OF THE SHARES. THE GRANTEE REPRESENTS THAT THE GRANTEE HAS CONSULTED WITH ANY TAX CONSULTANTS THE GRANTEE DEEMS ADVISABLE IN CONNECTION WITH THE PURCHASE OR DISPOSITION OF THE SHARES AND THAT THE GRANTEE IS NOT RELYING ON THE COMPANY FOR ANY TAX ADVICE.

          (a) Exercise of Incentive Stock Option. If the Option qualifies as an Incentive Stock Option, there will be no regular federal income tax liability upon the exercise of the Option, although the excess, if any, of the Fair Market Value of the Shares on the date of exercise over the Exercise Price will be treated as income for purposes of the alternative minimum tax for federal tax purposes and may subject the Grantee to the alternative minimum tax in the year of exercise. However, the Internal Revenue Service issued proposed regulations which would subject the Grantee to withholding at the time the Grantee exercises an Incentive Stock Option for Social Security and Medicare based upon the excess, if any, of the Fair Market Value of the Shares on the date of exercise over the Exercise Price. These proposed regulations are subject to further modification by the Internal Revenue Service and, if adopted, would be effective only for the exercise of an Incentive Stock Option that occurs two years after the regulations are issued in final form.

          (b) Exercise of Incentive Stock Option Following Disability. If the Grantee’s Continuous Service terminates as a result of Disability that is not permanent and total disability as such term is defined in Section 22(e)(3) of the Code, to the extent permitted on the date of termination, the Grantee must exercise an Incentive Stock Option within three (3) months of such termination for the Incentive Stock Option to be qualified as an Incentive Stock Option. Section 22(e)(3) of the Code provides that an individual is permanently and totally disabled if he or she is unable to engage in any substantial gainful activity by reason of any medically

7

determinable physical or mental impairment which can be expected to result in death or which has lasted or can be expected to last for a continuous period of not less than twelve (12) months.

          (c) Exercise of Non-Qualified Stock Option. On exercise of a Non-Qualified Stock Option, the Grantee will be treated as having received compensation income (taxable at ordinary income tax rates) equal to the excess, if any, of the Fair Market Value of the Shares on the date of exercise over the Exercise Price. If the Grantee is an Employee or a former Employee, the Company will be required to withhold from the Grantee’s compensation or collect from the Grantee and pay to the applicable taxing authorities an amount in cash equal to a percentage of this compensation income at the time of exercise, and may refuse to honor the exercise and refuse to deliver Shares if such withholding amounts are not delivered at the time of exercise.

          (d) Disposition of Shares. In the case of a Non-Qualified Stock Option, if Shares are held for more than one year, any gain realized on disposition of the Shares will be treated as long-term capital gain for federal income tax purposes. In the case of an Incentive Stock Option, if Shares transferred pursuant to the Option are held for more than one year after receipt of the Shares and are disposed more than two years after the Date of Award, any gain realized on disposition of the Shares also will be treated as capital gain for federal income tax purposes and subject to the same tax rates and holding periods that apply to Shares acquired upon exercise of a Non-Qualified Stock Option. If Shares purchased under an Incentive Stock Option are disposed of prior to the expiration of such one-year or two-year periods, any gain realized on such disposition will be treated as compensation income (taxable at ordinary income rates) to the extent of the difference between the Exercise Price and the lesser of (i) the Fair Market Value of the Shares on the date of exercise, or (ii) the sale price of the Shares.

     16. Lock-Up Agreement.

          (a) Agreement. The Grantee, if requested by the Company and the lead underwriter of any public offering of the Common Stock (the “Lead Underwriter”), hereby irrevocably agrees not to sell, contract to sell, grant any option to purchase, transfer the economic risk of ownership in, make any short sale of, pledge or otherwise transfer or dispose of any interest in any Common Stock or any securities convertible into or exchangeable or exercisable for or any other rights to purchase or acquire Common Stock (except Common Stock included in such public offering or acquired on the public market after such offering) during the 180-day period following the effective date of a registration statement of the Company filed under the Securities Act of 1933, as amended, or such shorter period of time as the Lead Underwriter shall specify. The Grantee further agrees to sign such documents as may be requested by the Lead Underwriter to effect the foregoing and agrees that the Company may impose stop-transfer instructions with respect to such Common Stock subject to the lock-up period until the end of such period. The Company and the Grantee acknowledge that each Lead Underwriter of a public offering of the Company’s stock, during the period of such offering and for the 180-day period thereafter, is an intended beneficiary of this Section 16.

          (b) No Amendment Without Consent of Underwriter. During the period from identification of a Lead Underwriter in connection with any public offering of the Company’s

8

Common Stock until the earlier of (i) the expiration of the lock-up period specified in Section 16(a) in connection with such offering or (ii) the abandonment of such offering by the Company and the Lead Underwriter, the provisions of this Section 16 may not be amended or waived except with the consent of the Lead Underwriter.

     17. Entire Agreement: Governing Law. The Plan and this Option Agreement constitute the entire agreement of the parties with respect to the subject matter hereof and supersede in their entirety all prior undertakings and agreements of the Company and the Grantee with respect to the subject matter hereof, and may not be modified adversely to the Grantee’s interest except by means of a writing signed by the Company and the Grantee. Nothing in the Plan and this Option Agreement (except as expressly provided therein) is intended to confer any rights or remedies on any persons other than the parties. The Plan and this Option Agreement are to be construed in accordance with and governed by the internal laws of the State of Nevada without giving effect to any choice of law rule that would cause the application of the laws of any jurisdiction other than the internal laws of the State of Nevada to the rights and duties of the parties. Should any provision of the Plan or this Option Agreement be determined by a court of law to be illegal or unenforceable, such provision shall be enforced to the fullest extent allowed by law and the other provisions shall nevertheless remain effective and shall remain enforceable.

     18. Headings. The captions used in this Option Agreement are inserted for convenience and shall not be deemed a part of the Option for construction or interpretation.

     19. Dispute Resolution. The provisions of this Section 19 shall be the exclusive means of resolving disputes arising out of or relating to the Plan and this Option Agreement. The Company, the Grantee, and the Grantee’s assignees (the “parties”) shall attempt in good faith to resolve any disputes arising out of or relating to the Plan and this Option Agreement by negotiation between individuals who have authority to settle the controversy. Negotiations shall be commenced by either party by notice of a written statement of the party’s position and the name and title of the individual who will represent the party. Within thirty (30) days of the written notification, the parties shall meet at a mutually acceptable time and place, and thereafter as often as they reasonably deem necessary, to resolve the dispute. If the dispute has not been resolved by negotiation, the parties agree that any suit, action, or proceeding arising out of or relating to the Plan or this Option Agreement shall be brought in the United States District Court for the District of Nevada (or should such court lack jurisdiction to hear such action, suit or proceeding, in a Nevada state court in the County of ▇▇▇▇▇) and that the parties shall submit to the jurisdiction of such court. The parties irrevocably waive, to the fullest extent permitted by law, any objection the party may have to the laying of venue for any such suit, action or proceeding brought in such court. THE PARTIES ALSO EXPRESSLY WAIVE ANY RIGHT THEY HAVE OR MAY HAVE TO A JURY TRIAL OF ANY SUCH SUIT, ACTION OR PROCEEDING. If any one or more provisions of this Section 19 shall for any reason be held invalid or unenforceable, it is the specific intent of the parties that such provisions shall be modified to the minimum extent necessary to make it or its application valid and enforceable.

     20. Notices. Any notice required or permitted hereunder shall be given in writing and shall be deemed effectively given upon personal delivery, upon deposit for delivery by an internationally recognized express mail courier service or upon deposit in the United States mail

9

by certified mail (if the parties are within the United States), with postage and fees prepaid, addressed to the other party at its address as shown in this Option Agreement, or to such other address as such party may designate in writing from time to time to the other party.

     21. Confidentiality. The Company shall provide to the Grantee, during the period the Option is outstanding, copies of financial statements of the Company at least annually. The Grantee understands and agrees that such financial statements are confidential and shall not be disclosed by the Grantee, to any entity or person, for any reason, at any time, without the prior written consent of the Company, unless required by law. If disclosure of such financial statements is required by law, whether through subpoena, request for production, deposition, or otherwise, the Grantee promptly shall provide written notice to Company, including copies of the subpoena, request for production, deposition, or otherwise, within five (5) business days of their receipt by the Grantee and prior to any disclosure so as to provide Company an opportunity to move to quash or otherwise to oppose the disclosure. Notwithstanding the foregoing, the Grantee may disclose the terms of such financial statements to his or her spouse or domestic partner, and for legitimate business reasons, to legal, financial, and tax advisors.

     22. Rights as Stockholder. Until the stock certificate evidencing the Shares is issued following the exercise of the Option (as evidenced by the appropriate entry on the books of the Company or of a duly authorized transfer agent of the Company), no right to vote or receive dividends or any other rights as a stockholder shall exist with respect to the Shares, notwithstanding the exercise of the Option. The Company shall issue (or cause to be issued) such stock certificate promptly after the Option is exercised. No adjustment will be made for a dividend or other right for which the record date is prior to the date the stock certificate is issued, except as provided in Section 10 of the Plan. The Grantee shall enjoy rights as a stockholder until such time as the Grantee disposes of the Shares or the Company and/or its assignee(s) exercises the Right of First Refusal. Upon such exercise, the Grantee shall have no further rights as a holder of the Shares so purchased except the right to receive payment for the Shares so purchased in accordance with the provisions of this Option Agreement, and the Grantee shall forthwith cause the certificate(s) evidencing the Shares so purchased to be surrendered to the Company for transfer or cancellation.

     23. Restrictive Legends. The Grantee understands and agrees that the Company shall cause the legends set forth below or legends substantially equivalent thereto, to be placed upon any certificate(s) evidencing ownership of the Shares together with any other legends that may be required by the Company or by state or federal securities laws:

THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 (THE “ACT”) OR ANY STATE SECURITIES LAWS AND MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR HYPOTHECATED UNLESS AND UNTIL REGISTERED UNDER THE ACT OR, IN THE OPINION OF COUNSEL SATISFACTORY TO THE ISSUER OF THESE SECURITIES, SUCH OFFER, SALE OR

10

TRANSFER, PLEDGE OR HYPOTHECATION IS IN COMPLIANCE THEREWITH.

THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO CERTAIN RESTRICTIONS ON TRANSFER AND A RIGHT OF FIRST REFUSAL HELD BY THE ISSUER OR ITS ASSIGNEE(S) AS SET FORTH IN THE OPTION AGREEMENT BETWEEN THE ISSUER AND THE ORIGINAL HOLDER OF THESE SHARES, A COPY OF WHICH MAY BE OBTAINED AT THE PRINCIPAL OFFICE OF THE ISSUER. SUCH TRANSFER RESTRICTIONS AND RIGHT OF FIRST REFUSAL ARE BINDING ON TRANSFEREES OF THESE SHARES.

     IN WITNESS WHEREOF, the Company and the Grantee have executed this Option Agreement and agree that the Option is to be governed by the terms and conditions of this Option Agreement and the Plan.

THE GRANTEE ACKNOWLEDGES AND AGREES THAT THE SHARES SUBJECT TO THE OPTION SHALL VEST, IF AT ALL, ONLY DURING THE PERIOD OF THE GRANTEE’S CONTINUOUS SERVICE (NOT THROUGH THE ACT OF BEING HIRED, BEING GRANTED THE OPTION OR ACQUIRING SHARES HEREUNDER). THE GRANTEE FURTHER ACKNOWLEDGES AND AGREES THAT NOTHING IN THIS OPTION AGREEMENT OR THE PLAN SHALL CONFER UPON THE GRANTEE ANY RIGHT WITH RESPECT TO FUTURE AWARDS OR CONTINUATION OF THE GRANTEE’S CONTINUOUS SERVICE, NOR SHALL IT INTERFERE IN ANY WAY WITH THE GRANTEE’S RIGHT OR THE RIGHT OF THE COMPANY OR RELATED ENTITY TO WHICH THE GRANTEE PROVIDES SERVICES TO TERMINATE THE GRANTEE’S CONTINUOUS SERVICE, WITH OR WITHOUT CAUSE, AND WITH OR WITHOUT NOTICE. THE GRANTEE ACKNOWLEDGES THAT UNLESS THE GRANTEE HAS A WRITTEN EMPLOYMENT AGREEMENT WITH THE COMPANY TO THE CONTRARY, THE GRANTEE’S STATUS IS AT WILL.

     The Grantee acknowledges receipt of a copy of this Option Agreement and the Plan, and represents that he or she is familiar with the terms and provisions thereof, and hereby accepts the Option subject to all of the terms and provisions hereof and thereof. The Grantee has reviewed this Option Agreement and the Plan in their entirety, has had an opportunity to obtain the advice of counsel prior to executing this Option Agreement, and fully understands all provisions of this Option Agreement and the Plan. The Grantee hereby agrees that all disputes arising out of or

11

relating to this Option Agreement and the Plan shall be resolved in accordance with Section 19 of this Option Agreement. The Grantee further agrees to notify the Company upon any change in the residence address indicated in this Option Agreement.

12

EXHIBIT A

WESTERN ALLIANCE BANCORPORATION 2002 STOCK OPTION PLAN

EXERCISE NOTICE

___

Attention: Chief Financial Officer

     1. Effective as of today, ___, the undersigned (the “Grantee”) hereby elects to exercise the Grantee’s option to purchase ___shares of the Common Stock (the “Shares”) of Western Alliance Bancorporation, (the “Company”) under and pursuant to the Company’s 2002 Stock Option Plan, as amended from time to time (the “Plan”) and the [ ] Incentive [ ] Non-Qualified Stock Option Award Agreement (the “Option Agreement”) dated ___, ___. Unless otherwise defined herein, the terms defined in the Plan shall have the same defined meanings in this Exercise Notice.

     2. Representations of the Grantee. The Grantee acknowledges that the Grantee has received, read and understood the Plan and the Option Agreement and agrees to abide by and be bound by their terms and conditions. In the event the Shares purchased hereunder have not been registered under the Securities Act of 1933, as amended, the Grantee shall, if requested by the Company, deliver to the Company his or her Investment Representation Statement in the form attached hereto as Exhibit 1.

     3. Delivery of Payment. The Grantee herewith delivers to the Company the full Exercise Price for the Shares, which, to the extent selected, shall be deemed to be satisfied by use of the broker-dealer sale and remittance procedure to pay the Exercise Price provided in Section 5(d) of the Option Agreement.

     4. Successors and Assigns. The Company may assign any of its rights under this Exercise Notice to single or multiple assignees, and this agreement shall inure to the benefit of the successors and assigns of the Company. Subject to the restrictions on transfer herein set forth, this Exercise Notice shall be binding upon the Grantee and his or her heirs, executors, administrators, successors and assigns.

     5. Headings. The captions used in this Exercise Notice are inserted for convenience and shall not be deemed a part of this agreement for construction or interpretation.

     6. Further Instruments. The parties agree to execute such further instruments and to take such further action as may be reasonably necessary to carry out the purposes and intent of this Exercise Notice.

     7. Entire Agreement. The Plan and the Option Agreement are incorporated herein by reference and together with this Exercise Notice constitute the entire agreement of the parties with respect to the subject matter hereof and supersede in their entirety all prior undertakings and agreements of the Company and the Grantee with respect to the subject matter hereof, and may

1

not be modified adversely to the Grantee’s interest except by means of a writing signed by the Company and the Grantee. Nothing in the Plan, the Option Agreement and this Exercise Notice (except as expressly provided therein) is intended to confer any rights or remedies on any persons other than the parties.

2

EXHIBIT 1

WESTERN ALLIANCE BANCORPORATION 2002 STOCK OPTION PLAN

INVESTMENT REPRESENTATION STATEMENT

In connection with the purchase of the above-listed Securities, the undersigned Grantee represents to the Company the following:

          (a) Grantee is aware of the Company’s business affairs and financial condition and has acquired sufficient information about the Company to reach an informed and knowledgeable decision to acquire the Securities. Grantee is acquiring these Securities for investment for ▇▇▇▇▇▇▇’s own account only and not with a view to, or for resale in connection with, any “distribution” thereof within the meaning of the Securities Act of 1933, as amended (the “Securities Act”).

          (b) Grantee acknowledges and understands that the Securities constitute “restricted securities” under the Securities Act and have not been registered under the Securities Act in reliance upon a specific exemption therefrom, which exemption depends upon among other things, the bona fide nature of ▇▇▇▇▇▇▇’s investment intent as expressed herein. Grantee further understands that the Securities must be held indefinitely unless they are subsequently registered under the Securities Act or an exemption from such registration is available. ▇▇▇▇▇▇▇ further acknowledges and understands that the Company is under no obligation to register the Securities. ▇▇▇▇▇▇▇ understands that the certificate evidencing the Securities will be imprinted with a legend which prohibits the transfer of the Securities unless they are registered or such registration is not required in the opinion of counsel satisfactory to the Company.

          (c) Grantee is familiar with the provisions of Rule 701 and Rule 144, each promulgated under the Securities Act, which, in substance, permit limited public resale of “restricted securities” acquired, directly or indirectly from the issuer thereof, in a non-public offering subject to the satisfaction of certain conditions. Rule 701 provides that if the issuer qualifies under Rule 701 at the time of the grant of the Option to the Grantee, the exercise will be exempt from registration under the Securities Act. In the event the Company becomes subject to the reporting requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, ninety (90) days thereafter (or such longer period as any market stand-off agreement may require) the Securities exempt under Rule 701 may be resold, subject to the satisfaction of certain of the conditions specified by Rule 144, including: (1) the resale being made through a broker in an unsolicited “broker’s transaction” or in transactions directly with a market maker (as said term is defined under the Securities Exchange Act of 1934); and, in the case of an affiliate, (2) the

3

availability of certain public information about the Company, (3) the amount of Securities being sold during any three month period not exceeding the limitations specified in Rule 144(e), and (4) the timely filing of a Form 144, if applicable.

     In the event that the Company does not qualify under Rule 701 at the time of grant of the Option, then the Securities may be resold in certain limited circumstances subject to the provisions of Rule 144, which requires the resale to occur not less than one year after the later of the date the Securities were sold by the Company or the date the Securities were sold by an affiliate of the Company, within the meaning of Rule 144; and, in the case of acquisition of the Securities by an affiliate, or by a non-affiliate who subsequently holds the Securities less than two (2) years, the satisfaction of the conditions set forth in sections (1), (2), (3) and (4) of the paragraph immediately above.

          (d) Grantee further understands that in the event all of the applicable requirements of Rule 701 or 144 are not satisfied, registration under the Securities Act, compliance with Regulation A, or some other registration exemption will be required; and that, notwithstanding the fact that Rules 144 and 701 are not exclusive, the Staff of the Securities and Exchange Commission has expressed its opinion that persons proposing to sell private placement securities other than in a registered offering and otherwise than pursuant to Rules 144 or 701 will have a substantial burden of proof in establishing that an exemption from registration is available for such offers or sales, and that such persons and their respective brokers who participate in such transactions do so at their own risk. Grantee understands that no assurances can be given that any such other registration exemption will be available in such event.

          (e) Grantee represents that Grantee is a resident of the state of ___.

4