Western Alliance Bancorporation Western Alliance Bancorporation is a leading bank holding company in the Southwest, headquartered in Phoenix, with banking and financial service subsidiaries in Arizona, California, Nevada and Colorado. The company provides services to businesses, entrepreneurs, professionals, nonprofit organizations, high net worth individuals and other consumers seeking the robust product array of a national bank with the individual, personal attention of a community bank, delivered through a dedicated, local Relationship Manager. Additional information about Western Alliance Bancorporation is available on the company's website, www.westernalliancebancorp.com.