On October 31, 2012, BOK Financial Corporation ("BOK Financial") issued a press release announcing its financial results for the three and nine months ended September 30, 2012 ("Press Release"). The full text of the Press Release is attached as Exhibit 99(a) to this report and is incorporated herein by reference. On October 31, 2012, in connection with issuance of the Press Release, BOK Financial released financial information related to the three and nine months ended September 30, 2012 ("Financial Information"), which includes certain historical financial information relating to BOK Financial. The Financial Information is attached as Exhibit 99(b) to this report and is incorporated herein by reference.

(a) Exhibits

99                 Text of Press Release, dated October 31, 2012 titled "BOK
                   Financial Reports Quarterly Earnings of $87 million --
                   Mortgage Banking Revenue Drives Results; Company Declares
                   Special Dividend" and Financial Information for the Three and
                   Nine Months Ended September 30, 2012