BOK Financial Corporation (BOKF) is a $24 billion regional financial services company based in Tulsa, Oklahoma. BOKF's holdings include BOKF, NA, BOSC, Inc, Cavanal Hill Investment Management and Southwest Trust Company. BOKF, NA operates 7 banking divisions: Bank of Albuquerque, Bank of Arizona, Bank of Arkansas, Bank of Kansas City, Bank of Oklahoma, Bank of Texas, and Colorado State Bank and Trust. BOK Financial Corporation has full-service banks located in 8 states. BOSC, Inc., the broker/dealer subsidiary, provides brokerage services in 10 states.