On August 1, 2012, BOK Financial Corporation ("BOK Financial") issued a press release announcing its financial results for the three and six months ended June 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 August 1, 2012, in connection with issuance of the Press Release, BOK Financial released financial information related to the three and six months ended June 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 August 1, 2012 titled "BOK
                   Financial Reports Quarterly Earnings of $98 million --
                   Non-interest Revenue Growth and Continued Credit Improvement
                   Drive Results" and Financial Information for the Three and Six
                   Months Ended June 30, 2012