Company: BOKF
Filing Date: 2025-03-20
Form Type: DEF 14A
Source: 0000875357-25-000020
Chunk: 1

Company: BOK FINANCIAL CORP
Filing Date: 2025-03-20
Form: DEF 14A
Chunk 1
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, Schedule or Registration Statement No.:                                                                                                                                                                                                                                  |
|   |     | 3)    Filing Party:                                                                                                                                                                                                                                                                  |
|   |     | 4)    Date Filed:                                                                                                                                                                                                                                                                    |

<div align='center'>March 20, 2025</div>

To Our Shareholders:

The Annual Meeting of Shareholders of BOK Financial Corporation will be held this year on Tuesday, April 29, 2025, at 2:30 p.m. Central Time as a virtual meeting of shareholders. You will be able to participate in the meeting, vote, and submit questions during the meeting via live webcast by visiting www.virtualshareholdermeeting.com/BOKF2025 and entering your secure control number, which can be found on the enclosed proxy card. Details of the business to be conducted at the annual meeting are given in the attached Notice of Annual Meeting and Proxy Statement. Also enclosed is our Annual Report to Shareholders, covering the fiscal year ended December 31, 2024.

We hope that you will be able to attend this meeting via live webcast, but all shareholders, whether or not they expect to attend the meeting, are requested to complete, date and sign the enclosed proxy and return it in the enclosed envelope as promptly as possible.

Sincerely,

George B. Kaiser, Chairman of the

Board of Directors

Stacy C. Kymes, President and

Chief Executive Officer

<div align='center'>BOK Financial Corporation | 1</div>

### TABLE OF CONTENTS
| NOTICE OF ANNUAL MEETING OF SHAREHOLDERS                                               |     |  4 |
| PROXY STATEMENT FOR ANNUAL MEETING OF SHAREHOLDERS                                     |     |  5 |
| General                                                                                |     |  5 |
| Voting by Proxy                                                                        |     |  5 |
| Voting and Quorum Requirements at the Meeting                                          |     |  5 |
| Solicitation of Proxies                                                                |     |  6 |
| Annual Report                                                                          |     |  6 |
| Principal Executive Offices of the Company                                             |     |  6 |
| Principal Shareholders of the Company                                                  |     |  6 |
| Security Ownership of Certain Beneficial Owners and Management                         |     |  7 |
| PROPOSAL ONE - ELECTION OF DIRECTORS                                                   |     |  9 |
| Nominees and Vote Required to Elect Nominees                                           |     |  9 |
| Term of Office