Company: BANFP
Filing Date: 2025-08-05
Form Type: S-3ASR
Source: 0000950170-25-102928
Chunk: 0

Company: BANCFIRST CORP /OK/
Filing Date: 2025-08-05
Form: S-3ASR
Chunk 0
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<div align='center'>As filed with the Securities and Exchange Commission on August 5, 2025</div>

Registration No. 333-

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-3 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

| BANCFIRST CORPORATION                                                                                                            |
| (Exact name of Registrant as specified in its charter)                                                                           |
| Oklahoma                                                               73-1221379                                                |
| (State or other jurisdiction of incorporation or organization)                              (I.R.S. Employer Identification No.) |

100 North Broadway Oklahoma City, Oklahoma 73102 (405) 270-1086 (Address, including zip code, and telephone number, including area code, of Registrants’ principal executive offices) _____________________________ David R. Harlow President and Chief Executive Officer BancFirst Corporation 100 North Broadway Oklahoma City, Oklahoma 73102 (405) 270-1086 (Name, address, including zip code, and telephone number, including area code, of agent for service) _______________________ COPY TO:

| Roger A. StongCrowe & Dunlevy324 N. Robinson Ave., Suite 100Oklahoma City, OK 73102(405) 239-6614________________________ |

Approximate date of commencement of proposed sale to the public: From time to time after the effective date of this Registration Statement. If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box.  If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box.  If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e