Columbia Banking System, Inc. Common Stock, also called Columbia Banking System, is a bank holding company, which engages in the provision of financial services. Read More It specializes in personal, business, and wealth management. It offers checking and savings accounts; debit and credit cards; digital banking; personal loans; home loans; foreign currency; professional banking; treasury management; merchant card services; international banking; financial services; private banking; and trust and investment services. The company was founded in 1988 and is headquartered in Tacoma, WA. The listed name for COLB is Columbia Banking System, Inc. Common Stock.