Columbia Banking System, Inc. operates as the holding company of Umpqua Bank that provides commercial and retail banking services. The company offers deposit products, including non-interest bearing checking, analyzed business, interest bearing checking and savings, and money market accounts, as well as insured cash sweep and other investment sweep solutions, and certificates of deposit. It also provides loans for corporate and commercial customers, such as accounts receivable and inventory financing, multi-family and equipment loans, commercial equipment leases, international trade finance, real estate construction loans, permanent financing, and small business administration program financing, as well as capital markets and treasury management and payments solutions comprising ACH, wires, positive pay, remote deposit capture, integrated payments, integrated receivables, lockbox, cash vault, real-time payments, commercial card, and foreign exchange related products, as well as merchant services. In addition, the company offers loan products, such as commercial and industrial loans; residential real estate loans for the construction, purchase, and refinancing of residential owner-occupied and rental properties; and consumer loans comprising secured and unsecured personal loans, home equity and personal lines of credit, and motor vehicle loans. It operates in Arizona, California, Colorado, Idaho, Nevada, Oregon, Utah, and Washington states. The company serves high net worth individuals and families, select non-profits, and professional services firms. The company was founded in 1953 and is headquartered in Tacoma, Washington.