Western Alliance Bancorporation is a bank holding company. The Company provides a full spectrum of customized loan, deposit, and treasury management capabilities, including funds transfer and other digital payment offerings through its wholly owned banking subsidiary, Western Alliance Bank (WAB). WAB operates through five full-service banking divisions: Alliance Bank of Arizona, Bank of Nevada, Bridge Bank, First Independent Bank, and Torrey Pines Bank. The Company also provides a range of specialized financial services to business customers across the country, including mortgage banking services through AmeriHome and treasury management services to the homeowner's association sector, and digital payment services for the class action legal industry. It has two non-bank subsidiaries, such as CS Insurance Company (CSI) and Western Alliance Trust Company, N.A. (WATC). CSI is a captive insurance company. WATC provides corporate trust services and levered loan administration solutions.