PacWest Bancorp is a bank holding company. The Company’s business is to serve as the holding bank for its subsidiary, Pacific Western Bank (Pacific Western or the Bank). It is a commercial bank that offers banking products and services, including accepting demand, money market, and time deposits and originating loans and leases, including an array of commercial real estate loans and commercial lending products. It operates in two segments: Community Banking, which includes the operations of Pacific Western Bank, excluding the CapitalSource Division, and National Lending, which includes the lending operations gained through the CapitalSource Inc. merger, Pacific Western Equipment Finance and the CapitalSource Business Finance Group. The Bank offers products and services through its CapitalSource and Square 1 Bank divisions. The Square 1 Bank Division offers financial services focused on entrepreneurial businesses, and their venture capital and private equity investors.