Company: BANFP
Filing Date: 2025-08-05
Form Type: S-3ASR
Source: 0000950170-25-102928
Chunk: 2

Company: BANCFIRST CORP /OK/
Filing Date: 2025-08-05
Form: S-3ASR
Chunk 2
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 listed on the NASDAQ Global Select Market under the symbol “BANF.” Each prospectus supplement will indicate if the securities offered thereby will be listed on any securities exchange.

Investing in our securities involves risk. You should carefully consider the information referred to under the heading “Risk Factors” beginning on page 4 before you invest in our securities.

Any securities offered by this prospectus and accompanying prospectus supplement will not be savings accounts, deposits or other obligations of any bank and are not insured or guaranteed by the Federal Deposit Insurance Corporation, or the FDIC, the Bank Insurance Fund or any other government agency or instrumentality.

None of the Securities and Exchange Commission, the FDIC, the Board of Governors of the Federal Reserve System, the Federal Reserve System, or any state securities commission or any other federal regulatory agency has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.

<div align='center'>The date of this prospectus is August 5, 2025</div>

TABLE O F CONTENTS

| ABOUT THIS PROSPECTUS                                | 1 |
| CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS | 1 |
| WHERE YOU CAN FIND MORE INFORMATION                  | 2 |
| INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE      | 3 |
| BANCFIRST CORPORATION                                | 4 |
| RISK FACTORS                                         | 4 |
| USE OF PROCEEDS                                      | 4 |
| PLAN OF DISTRIBUTION                                 | 5 |
| DESCRIPTION OF CAPITAL STOCK                         | 6 |
| LEGAL MATTERS                                        | 8 |
| EXPERTS                                              | 8 |

We are responsible only for the information contained in or incorporated by reference into this prospectus and any applicable prospectus supplement. We have not authorized any other person to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely on it. We are not making an offer to sell the securities in any jurisdiction where the offer or sale is not permitted. You should assume that the information appearing in this prospectus, any applicable prospectus supplement and the documents incorporated by reference herein and therein is accurate only as of their respective dates. Our business, financial condition, results of operations and prospects may have changed since those dates.

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ABOUT THIS PROSPECTUS</div>

This prospectus is part of a registration statement that we filed with