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):
                                  July 21, 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 2.02.  Results of Operations and Financial Condition

     On July 22, 2008,  subsequent to BOK Financial's earnings  announcement for
the second  quarter of 2008,  SemGroup  L.P. and 24 related  entities  filed for
bankruptcy  protection.  BOK  Financial  had credit  exposure to SemGroup,  L.P.
through loans and derivative  contracts of approximately $147 million as of June
30,  2008.  As disclosed in previous  filings with the  Securities  and Exchange
Commission, the principal owner of SemGroup resigned from the Board of Directors
of BOK Financial on July 16, 2008.

     BOK Financial currently expects to recognize pre-tax charges of $71 million
related to  SemGroup  for the second  quarter of 2008 in addition to $16 million
pre-tax charges recognized in the initial earnings release on July 15, 2008. The
total  pre-tax  charges are based on an  assessment  of a range of values  using
information currently available,  including information provided by a nationally
recognized financial advisor to SemGroup.  The range considers both the value of
SemGroup as a going concern and its liquidation  value.  Our current estimate is
based on the lower end of the range of values.  BOK  Financial's  strong capital
position  will  enable  the  company to absorb  these  pre-tax  charges  without
impeding our operations and growth.


ITEM 2.03.  Creation of a Direct Financial Obligation or an Obligation under
     an Off-Balance Sheet Arrangement of a Registrant

     On July 21, 2008,  BOK Financial  Corporation  entered into a $188 million,
unsecured  revolving  credit  agreement with George B. Kaiser,  its Chairman and
principal shareholder. Interest on the outstanding balance is based on one-month
LIBOR plus 125 basis points and payable  quarterly.  Additional  interest on the
unused commitment amount is based on 25 basis points and payable quarterly. This
agreement has no restrictive  covenants,  which provides greater  flexibility to
fund the needs of BOK Financial and its subsidiaries.  This agreement expires on
December 2, 2010.

     The credit  agreement with Mr. Kaiser  replaces a credit  facility  entered
into on December 2, 2005 with a group of commercial  banks which was  terminated
at the request of BOK Financial on July 21, 2008.


ITEM 9.01.  Financial Statements and Exhibits.

     (c)  Exhibits

          99(b) Credit Agreement between BOK Financial Corporation and George B.
               Kaiser dated July 21, 2008.


Forward-looking Information

     This  report  contains   forward-looking   statements  that  are  based  on
management's  beliefs,   assumptions,   current   expectations,   estimates  and
projections about BOK Financial, the financial services industry and the economy
generally.  Words such as  "anticipates,"  "believes,"  "estimates,"  "expects,"
"forecasts,"   "plans,"  "projects,"   variations  of  such  words  and  similar
expressions are intended to identify such forward-looking statements. Management
judgments  relating to and  discussion of the provision and allowance for credit
losses involve judgments as to future events and are inherently  forward-looking
statements.  Assessments  that BOK  Financial's  acquisitions  and other  growth
endeavors  will be  profitable  are  necessary  statements  of  belief as to the
outcome of future events based in part on  information  provided by others which
BOK  Financial  has  not  independently  verified.   These  statements  are  not
guarantees of future performance and involve certain risks,  uncertainties,  and
assumptions  which are  difficult  to predict  with  regard to  timing,  extent,
likelihood and degree of occurrence.  Therefore, actual results and outcomes may
materially  differ  from  what  is  expected,  implied  or  forecasted  in  such
forward-looking statements.  Internal and external factors that might cause such
a difference  include,  but are not limited to (1) the ability to fully  realize
expected  cost  savings from mergers  within the expected  time frames,  (2) the
ability of other  companies on which BOK  Financial  relies to provide goods and
services in a timely and  accurate  manner,  (3)  changes in interest  rates and
interest  rate  relationships,  (4) demand for  products and  services,  (5) the
degree of competition by traditional and nontraditional competitors, (6) changes
in banking regulations, tax laws, prices, levies and assessments, (7) the impact
of technological  advances and (8) trends in consumer  behavior as well as their
ability to repay loans. BOK Financial and its affiliates undertake no obligation
to update, amend or clarify forward-looking  statements,  whether as a result of
new information, future events, or otherwise.


                                    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:  July 24, 2008
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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):
                                  July 21, 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 2.02.  Results of Operations and Financial Condition

     On July 22, 2008,  subsequent to BOK Financial's earnings  announcement for
the second  quarter of 2008,  SemGroup  L.P. and 24 related  entities  filed for
bankruptcy  protection.  BOK  Financial  had credit  exposure to SemGroup,  L.P.
through loans and derivative  contracts of approximately $147 million as of June
30,  2008.  As disclosed in previous  filings with the  Securities  and Exchange
Commission, the principal owner of SemGroup resigned from the Board of Directors
of BOK Financial on July 16, 2008.

     BOK Financial currently expects to recognize pre-tax charges of $71 million
related to  SemGroup  for the second  quarter of 2008 in addition to $16 million
pre-tax charges recognized in the initial earnings release on July 15, 2008. The
total  pre-tax  charges are based on an  assessment  of a range of values  using
information currently available,  including information provided by a nationally
recognized financial advisor to SemGroup.  The range considers both the value of
SemGroup as a going concern and its liquidation  value.  Our current estimate is
based on the lower end of the range of values.  BOK  Financial's  strong capital
position  will  enable  the  company to absorb  these  pre-tax  charges  without
impeding our operations and growth.

ITEM 2.03.  Creation of a Direct Financial Obligation or an Obligation under
     an Off-Balance Sheet Arrangement of a Registrant

     On July 21, 2008,  BOK Financial  Corporation  entered into a $188 million,
unsecured  revolving  credit  agreement with George B. Kaiser,  its Chairman and
principal shareholder. Interest on the outstanding balance is based on one-month
LIBOR plus 125 basis points and payable  quarterly.  Additional  interest on the
unused commitment amount is based on 25 basis points and payable quarterly. This
agreement has no restrictive  covenants,  which provides greater  flexibility to
fund the needs of BOK Financial and its subsidiaries.  This agreement expires on
December 2, 2010.

     The credit  agreement with Mr. Kaiser  replaces a credit  facility  entered
into on December 2, 2005 with a group of commercial  banks which was  terminated
at the request of BOK Financial on July 21, 2008.

ITEM 9.01.  Financial Statements and Exhibits.

     (c)  Exhibits

          99(b) Credit Agreement between BOK Financial Corporation and George B.
               Kaiser dated July 21, 2008.

Forward-looking Information

     This  report  contains   forward-looking   statements  that  are  based  on
management's  beliefs,   assumptions,   current   expectations,   estimates  and
projections about BOK Financial, the financial services industry and the economy
generally.  Words such as  "anticipates,"  "believes,"  "estimates,"  "expects,"
"forecasts,"   "plans,"  "projects,"   variations  of  such  words  and  similar
expressions are intended to identify such forward-looking statements. Management
judgments  relating to and  discussion of the provision and allowance for credit
losses involve judgments as to future events and are inherently  forward-looking
statements.  Assessments  that BOK  Financial's  acquisitions  and other  growth
endeavors  will be  profitable  are  necessary  statements  of  belief as to the
outcome of future events based in part on  information  provided by others which
BOK  Financial  has  not  independently  verified.   These  statements  are  not
guarantees of future performance and involve certain risks,  uncertainties,  and
assumptions  which are  difficult  to predict  with  regard to  timing,  extent,
likelihood and degree of occurrence.  Therefore, actual results and outcomes may
materially  differ  from  what  is  expected,  implied  or  forecasted  in  such
forward-looking statements.  Internal and external factors that might cause such
a difference  include,  but are not limited to (1) the ability to fully  realize
expected  cost  savings from mergers  within the expected  time frames,  (2) the
ability of other  companies on which BOK  Financial  relies to provide goods and
services in a timely and  accurate  manner,  (3)  changes in interest  rates and
interest  rate  relationships,  (4) demand for  products and  services,  (5) the
degree of competition by traditional and nontraditional competitors, (6) changes
in banking regulations, tax laws, prices, levies and assessments, (7) the impact
of technological  advances and (8) trends in consumer  behavior as well as their
ability to repay loans. BOK Financial and its affiliates undertake no obligation
to update, amend or clarify forward-looking  statements,  whether as a result of
new information, future events, or otherwise.

                                    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:  July 24, 2008