Nothing in this press release, the proposed settlement or the supplement to the proxy statement/prospectus shall be deemed an admission of the legal necessity or materiality of any of the disclosures set forth in the supplement.About Western Alliance Bancorporation With $7.2 billion in assets, Western Alliance Bancorporation is the parent company of Bank of Nevada, Western Alliance Bank doing business as Alliance Bank of Arizona and First Independent Bank, Torrey Pines Bank, and Shine Investment Advisory Services. These dynamic organizations provide a broad array of deposit and credit services to clients in Nevada, Arizona and California, and investment services in Colorado. Staffed with experienced financial professionals, these organizations deliver a broader product array and larger credit capacity than community banks, yet are empowered to be more responsive to customers' needs than larger institutions. Additional investor information can be accessed on the Investor Relations page of the company's website, www.westernalliancebancorp.com. About Western Liberty Bancorp With $199 million in assets, Western Liberty Bancorp is a Nevada bank holding company which conducts operations through Service1st Bank of Nevada, its wholly-owned banking subsidiary, and Las Vegas Sunset Properties. Service1st Bank operates as a traditional community bank and provides a full range of deposit, lending and other banking services to locally-owned businesses, professional firms, individuals and other customers from its headquarters and two retail banking facilities located in the greater Las Vegas area. Services provided include basic commercial and consumer depository services, commercial working capital and equipment loans, commercial real estate loans, and other traditional commercial banking services. Primarily all of the bank’s business is generated in the Nevada market. Additional Information This communication is being made in respect of the proposed merger involving Western Alliance and Western Liberty. In connection with the proposed merger with Western Liberty, Western Alliance filed with the SEC a Registration Statement on Form S-4, as amended, that included a proxy statement of Western Liberty that also constitutes a prospectus of Western Alliance. Western Liberty mailed the proxy statement/prospectus to its stockholders. Investors and security holders are urged to read the proxy statement/prospectus, including the newly filed supplement, regarding the proposed merger because it contains important information. You may obtain a free copy of the proxy statement/prospectus, including the supplement, and other related documents filed by Western Alliance and Western Liberty with the SEC at the SEC’s website at www.sec.gov. The proxy statement/prospectus and the other documents may also be obtained for free by accessing Western Alliance’s website at www.westernalliancebancorp.com under the tab “Investor Relations” and then under the heading “Financial Documents” or by accessing Western Liberty’s website at www.westernlibertybank.com under the tab “Investor Relations” and then under the heading “Financial Information”. Participants in the Transactions Western Alliance, Western Liberty and their respective directors, executive officers and certain other members of management and employees may be soliciting proxies from Western Liberty stockholders in favor of the merger with Western Alliance. Information regarding the persons who may, under the rules of the SEC, be considered participants in the solicitation of the Western Liberty stockholders in connection with the proposed merger is set forth in the proxy statement/prospectus filed with the SEC.