BOSC is a financial services company that serves individuals, corporations, government agencies, foundations, municipalities and institutional clients. Its services include institutional investments, public finance, investment banking, tax-exempt leasing and retail brokerage. It is a subsidiary of BOK Financial Corporation, which offers a wide range of financial products and services, including cash management, mortgage banking, brokerage and trading services to middle-market and small businesses, financial institutions and retail clients. It operates various full-service bank subsidiaries that include Bank of Oklahoma, Bank of Texas, Bank of Albuquerque, Bank of Arkansas and Bank of Arizona. BOSC has an office in Tulsa, Okla.