Bank of Arizona

BOK Financial, headquartered in Tulsa, Oklahoma, is one of the top 30 U.S. based bank holding companies. At more than $40 billion in assets, it is one of the largest bank holding companies in the United States. BOK Financial's holdings include BOKF, NA, BOK Financial Securities, Inc. and Cavanal Hill Investment Management, Inc. BOKF, NA operates the TransFund electronic funds network and four banking divisions: Bank of Albuquerque, Bank of Oklahoma, Bank of Texas and BOK Financial.