UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 2, 2009 BOK FINANCIAL CORPORATION (Exact name of registrant as specified in its charter) Oklahoma 000-19341 73-1373454 -------- --------- ---------- (State or other jurisdiction (Commission (IRS Employer of incorporation) File Number) Identification No.) Bank of Oklahoma Tower, Boston Avenue at Second Street, Tulsa, Oklahoma 74172 ------------------------------------------------------------------------------ (Address of principal executive offices) Registrant's telephone number, including area code: (918) 588-6000 ______________________N/A__________________________ (Former name or former address, if changes since last report) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: |_| Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425). |_| Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12). |_| Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)). |_| Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)). INFORMATION TO BE INCLUDED IN THE REPORT ITEM 2.03 - Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement. Effective December 2, 2009, BOK Financial Corporation (the "Corporation") and George B. Kaiser, Chairman of the Board of Directors of the Corporation, entered into a First Amended Debenture (the "First Amended Debenture) which amends the $188,000,000 debenture between the Corporation and Mr. Kaiser dated July 21, 2009 (the "Original Debenture"). The First Amended Debenture amends the Original Debenture by (i) decreasing the debenture from $188 million to $100 million; (ii) increasing the interest on outstanding balance due from one-month LIBOR plus 125 basis points to one month LIBOR plus 250 basis points, (iii) increasing the quarterly unused facility fee from 25 basis points to 50 basis points and (iv) extending the maturity date for the debenture from December 2, 2010 to December 2, 2012. As with the Original Debenture, the First Amended Debenture contains no restrictive covenants. There were no amounts outstanding under the Original Debenture and there are currently no amounts outstanding under the First Amended Debenture. ITEM 9.01 Financial Statement and Exhibits (c) Exhibits 99(a) First Amended Debenture dated December 2, 2009 between BOK Financial Corporation and George B. Kaiser Signature Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. BOK FINANCIAL CORPORATION By: /s/ Steven E. Nell -------------------------------- Steven E. Nell Executive Vice President Chief Financial Officer Date: December 3, 2009