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):
                                  May 27, 2008

                           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)).

<PAGE>

                    INFORMATION TO BE INCLUDED IN THE REPORT

ITEM 1.01  ENTRY INTO A MATERIAL DEFINITIVE AGREEMENT

On May 27, 2008, BOK Financial Corporation (the "Company") entered into a 10b5-1
Repurchase  Plan with BOSC,  Inc., a registered  broker/dealer  and wholly owned
subsidiary,  to purchase  Company common stock in compliance with Rule 10b5-1 of
the Securities  Exchange Act of 1934, as amended (the "10b5-1 Plan"). The 10b5-1
Plan will allow the Company's Rule 10b-18 share  repurchase  program to continue
during  periods when the Company would  normally not be active in the market due
to its internal trading black out periods and may be aware of material nonpublic
information.

On April 26, 2005,  the Company's  board of directors  authorized the Company to
repurchase  up to two million  shares of the  Company's  common  stock under the
repurchase  program.  As of March 31, 2008, the Company had repurchased  709,073
shares under the repurchase program.

Pursuant to the terms of the 10b5-1 Plan,  BOSC,  Inc., as agent for the Company
and through a mirrored  execution  agreement  with  Pershing  LLC, will purchase
varying percentages of the maximum daily volume allowable under Rule 10b-18 when
the Company is trading at various price ranges.  Any purchases  under the 10b5-1
Plan will be disclosed publicly through  appropriate filings with the Securities
and Exchange Commission.

The  description  of the Plan in this Item 1.01 is  qualified in its entirety by
reference  to the text of the plan,  a copy of which is filed as Exhibit 10.1 to
this Form 8-K and incorporated herein by reference.

ITEM 9.01.  Financial Statements and Exhibits

            (c)      Exhibits

+10.1 10b5-1  Repurchase  Plan between BOK Financial  Corporation and BOSC, Inc.
     dated May 27, 2008


+    The Company has  requested  confidential  treatment of certain  information
     contained in this exhibit.  Such information has been filed separately with
     the   Securities  and  Exchange   Commission   pursuant  to  the  Company's
     application for confidential treatment under 17 C.F.R. ss.ss.  200.80(b)(4)
     and 240.24b-2.



                                    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:  May 27, 2008






                                  Exhibit Index

Exhibit No.       Description

+10.1             10b5-1 Repurchase Plan between BOK Financial Corporation
                  and BOSC, Inc. dated May 27, 2008


+ The  Company  has  requested  confidential  treatment  of certain  information
contained in this exhibit.  Such  information has been filed separately with the
Securities and Exchange  Commission  pursuant to the Company's  application  for
confidential treatment under 17 C.F.R. ss.ss. 200.80(b)(4) and 240.24b-2.
[{"type": "8-K", "sequence": "1", "filename": "form8k053008.txt", "description": "FORM 8-K STOCK PLAN", "secsgml_size_bytes": 5206}]
{"company-data": {"conformed-name": "BOK FINANCIAL CORP ET AL", "cik": "0000875357", "assigned-sic": "6021", "irs-number": "731373454", "state-of-incorporation": "OK", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-19341", "film-number": "08869355"}, "business-address": {"street1": "BANK OF OKLAHOMA TOWER", "street2": "PO BOX 2300", "city": "TULSA", "state": "OK", "zip": "74192", "phone": "9185953025"}, "mail-address": {"street1": "BANK OF OKLAHOMA TOWER", "street2": "P O BOX 2300", "city": "TULSA", "state": "OK", "zip": "74192"}}
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):
                                  May 27, 2008

                           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 1.01  ENTRY INTO A MATERIAL DEFINITIVE AGREEMENT

On May 27, 2008, BOK Financial Corporation (the "Company") entered into a 10b5-1
Repurchase  Plan with BOSC,  Inc., a registered  broker/dealer  and wholly owned
subsidiary,  to purchase  Company common stock in compliance with Rule 10b5-1 of
the Securities  Exchange Act of 1934, as amended (the "10b5-1 Plan"). The 10b5-1
Plan will allow the Company's Rule 10b-18 share  repurchase  program to continue
during  periods when the Company would  normally not be active in the market due
to its internal trading black out periods and may be aware of material nonpublic
information.

On April 26, 2005,  the Company's  board of directors  authorized the Company to
repurchase  up to two million  shares of the  Company's  common  stock under the
repurchase  program.  As of March 31, 2008, the Company had repurchased  709,073
shares under the repurchase program.

Pursuant to the terms of the 10b5-1 Plan,  BOSC,  Inc., as agent for the Company
and through a mirrored  execution  agreement  with  Pershing  LLC, will purchase
varying percentages of the maximum daily volume allowable under Rule 10b-18 when
the Company is trading at various price ranges.  Any purchases  under the 10b5-1
Plan will be disclosed publicly through  appropriate filings with the Securities
and Exchange Commission.

The  description  of the Plan in this Item 1.01 is  qualified in its entirety by
reference  to the text of the plan,  a copy of which is filed as Exhibit 10.1 to
this Form 8-K and incorporated herein by reference.

ITEM 9.01.  Financial Statements and Exhibits

            (c)      Exhibits

+10.1 10b5-1  Repurchase  Plan between BOK Financial  Corporation and BOSC, Inc.
     dated May 27, 2008

+    The Company has  requested  confidential  treatment of certain  information
     contained in this exhibit.  Such information has been filed separately with
     the   Securities  and  Exchange   Commission   pursuant  to  the  Company's
     application for confidential treatment under 17 C.F.R. ss.ss.  200.80(b)(4)
     and 240.24b-2.

                                    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:  May 27, 2008

                                  Exhibit Index

Exhibit No.       Description

+10.1             10b5-1 Repurchase Plan between BOK Financial Corporation
                  and BOSC, Inc. dated May 27, 2008

+ The  Company  has  requested  confidential  treatment  of certain  information
contained in this exhibit.  Such  information has been filed separately with the
Securities and Exchange  Commission  pursuant to the Company's  application  for
confidential treatment under 17 C.F.R. ss.ss. 200.80(b)(4) and 240.24b-2.