PacWest Bancorp is a bank holding company with one wholly-owned banking subsidiary, Pacific Western Bank (the `Bank`). The Company provides commercial banking services, including real estate, construction, and commercial loans, and comprehensive deposit and treasury management services to small and medium-sized businesses. PacWest offers additional products and services through its CapitalSource and Square 1 Bank divisions. Its CapitalSource Division provides asset-based, equipment, real estate and security cash flow loans and treasury management services to established middle market businesses on a national basis. Its Square 1 Bank Division offers a comprehensive suite of financial services focused on entrepreneurial businesses and their venture capital and private equity investors, with offices located in key innovation hubs across the United States.