Company: BOKF
Filing Date: 2025-06-16
Form Type: 11-K
Source: 0000875357-25-000036
Chunk: 0

Company: BOK FINANCIAL CORP
Filing Date: 2025-06-16
Form: 11-K
Chunk 0
---
### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### FORM 11-K
| ☒ |     | ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 
 For the fiscal year ended December 31, 2024                                    |
|:--|:----|:-------------------------------------------------------------------------------|
| ☐ |     | TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES                  
 EXCHANGE ACT OF 1934                                                           |
|   |     | For the transition period from _____________ to ______________                 |

#### Commission File No. 001-37811
<div align='center'>A. Full title of the plan and the address of the plan:</div>

### BOK FINANCIAL 401(k) PLAN
<div align='center'>Boston Avenue at Second Street

Tulsa, Oklahoma 74192

B. Name of issuer of the securities held pursuant to the plan and the address of its principal executive office:</div>

### BOK FINANCIAL CORPORATION
<div align='center'>Boston Avenue at Second Street

Tulsa, Oklahoma 74192</div>

### SIGNATURES
The Plan. Pursuant to the requirements of the Securities Exchange Act of 1934, the trustees (or other persons who administer the employee benefit plan) have duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized.

| Date: |     | June 16, 2025 |     | By: |     | BOK FINANCIAL 401(K) RETIREMENT PLAN COMMITTEE 
 /s/ Jeffrey A. Reid                            |
|:------|:----|:--------------|:----|:----|:----|:-----------------------------------------------|
|       |     |               |     |     |     | Jeffrey A. Reid                                |
|       |     |               |     |     |     | BOK Financial 401(k) Retirement Plan Committee |

### CONTENTS
| Report of Independent Registered Public Accounting Firm                  |     |  1 |
| Statements of Net Assets Available for Benefits                          |     |  3 |
| Statement of Changes in Net Assets Available for Benefits                |     |  4 |
| Notes to Financial Statements                                            |     |  5 |
| Supplemental Schedule:                                                   |     |    |
| Form 5500 Schedule H; Line