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.