Columbia Banking System, Inc. operates as the Bank holding company of Columbia Bank that provides banking, private banking, mortgage, and other financial services in the United States. The company offers deposit products, including business, non-interest-bearing checking, interest-bearing checking and savings, and money market; and insured cash sweep and other investment sweep solutions. It also provides commercial lending products, such as commercial lines of credit and term loans, accounts receivable and inventory financing, international trade finance, commercial property loans, multifamily loans, equipment loans, commercial equipment leases, and real estate construction loans; and permanent financing and small business administration program financing, as well as capital markets.