POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

That the undersigned, KAYSE M. SHRUM, hereinafter referred to as
"Principal", has made, constituted, and appointed, and by these
presents does make, constitute and appoint TAMARA R. SLOAN,
hereinafter referred to as "Attorney", whether one or more
than one acting jointly, the true and lawful attorney for
Principal and in the name, place and stead of Principal to
do or perform any act which a Principal may lawfully do or
perform through any attorney-in-fact, such power to be limited
to the following:

To execute, on Principal's behalf, Forms 3, 4 and 5, and to file
such forms with the Securities and Exchange Commission and such
other regulating organizations or governmental agencies as may be
required and to obtain and maintain any filing codes related to
filing of the same with respect to all BOK Financial Corporation
stock ownership.

HEREBY GIVING AND GRANTING UNTO ATTORNEY, full power and authority
to do and perform all and every act and thing whatsoever requisite
and necessary to be done in and about the premises as fully and to
all intents and purposes as Principal might or could do if personally
present, with full power of substitution and revocation, hereby
ratifying and confirming all that Attorney  may do as it relates
solely to the power enumerated above.

This Power of Attorney may be revoked by Principal by an instrument
in writing signed by Principal.

IN WITNESS WHEREOF, I have hereunto set my hand this 8th day of
May, 2024.


                    By /s/ Kayse M. Shrum
                    KAYSE M. SHRUM

State of  Oklahoma

County of Tulsa

     This Power of Attorney was acknowledged before me on this
8th day of May, 2024 by Kayse M. Shrum, Individually.

[SEAL]

                    /s/ April E. Collier
                    Notary Public

                    My commission expires 06/30/2024
                    My commission number 04005883