BOK Financial Corporation is a multi-bank holding company based in Tulsa, Oklahoma. The company's stock is publicly traded on NASDAQ under the national market listings (symbol: BOKF). Assets of the organization are centered in four bank subsidiaries, Bank of Albuquerque, Bank of Arkansas, Bank of Oklahoma, and Bank of Texas. Additional mortgage origination offices are located in Kansas and Missouri, and the company operates a loan production office in Denver, Colorado.