Western Alliance Bancorporation is a Las Vegas-based holding company with regional banks operating in Nevada, Arizona, and California. The bank offers retail banking services and focuses on mortgages for retail customers and commercial loans. The company's reportable segments are Commercial segment includes provides commercial banking and treasury management products and services to small and middle-market businesses, specialized banking services to sophisticated commercial institutions and investors within niche industries, as well as financial services to the real estate industry. Consumer Related segment offers both commercial banking services to enterprises in consumer-related sectors and consumer banking services, such as residential mortgage banking. Corporate & Other.