Bank First Corp

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

(Rule 14a-101)

INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934 (Amendment No. )

Filed by the Registrant

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Filed by a Party other than the Registrant

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Check the appropriate box:

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Preliminary Proxy Statement

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Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

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Definitive Proxy Statement

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Definitive Additional Materials

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Soliciting Material under § 240.14a-12

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(Name of Registrant as Specified In Its Charter)

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(Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

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No fee required.

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Fee paid previously with preliminary materials.

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Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i) (1) and 0-11.

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April 24, 2026

Dear Shareholder:

You are cordially invited to attend the 2026 Annual Meeting of Shareholders (the “Annual Meeting”) of Bank First Corporation (the “Company”), the holding company for Bank First, N.A., which will be held on Monday, June 15, 2026, at 4:00 p.m., Central Daylight Time, at the Franciscan Center for Music Education and Performance, located at 6751 Calumet Avenue, Manitowoc, Wisconsin 54220. Refreshments will be served following the meeting.

The attached Notice of Annual Meeting of Shareholders and Proxy Statement describes the formal business to be acted upon at the Annual Meeting. The Proxy Statement and Annual Report on Form 10-K can be accessed at www.envisionreports.com/BFC or on our website at www.bankfirst.com. We expect directors and officers of the Company, as well as representatives of the Company’s auditors, to be present at the Annual Meeting to respond to any shareholder questions. Shareholders may also ask questions and provide comments before the Annual Meeting by contacting our Shareholder Services team at (920) 652-3360 or shareholderservices@bankfirst.com.

It is important that your shares be represented and voted at the Annual Meeting. Whether or not you plan to attend the Annual Meeting, we encourage you to complete and vote and submit your proxy online, by telephone, or by mail to ensure a quorum. If you vote your shares before the Annual Meeting, you will have the right to revoke your proxy and vote your shares by one of the methods described in this Proxy Statement.

We hope you will plan to attend our Annual Meeting on Monday, June 15, 2026. If you have any questions regarding any of the information provided herein, please do not hesitate to contact the Company’s Corporate Secretary, Kelly Dvorak, at (920) 652-3244 or kdvorak@bankfirst.com, or the Company’s Shareholder Services Officer, Lori Sisel, at (920) 863-1028 or lsisel@bankfirst.com. On behalf of our Board of Directors and Senior Management Team, thank you for your continued investment in Bank First Corporation. We look forward to seeing you at the Annual Meeting.

Sincerely,

Michael B. Molepske

Chairman of the Board and Chief Executive Officer

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NOTICE OF ANNUAL MEETING OF SHAREHOLDERS

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DATE:

Monday, June 15, 2026

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TIME:

4:00 p.m., Central Daylight Time

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LOCATION:

Franciscan Center for Music Education and Performance located at 6751 Calumet Avenue, Manitowoc, Wisconsin 54220

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NOTICE IS HEREBY GIVEN that the 2026 Annual Meeting of Shareholders (the “Annual Meeting”) of Bank First Corporation (the “Company”) will be held on Monday, June 15, 2026, at 4:00 p.m., Central Daylight Time, for the following purposes, all of which are described in greater detail in the accompanying Proxy Statement:

(1) To elect three (3) directors of the Company, each for a three-year term and in each case until their successors are elected and qualified;

(2) To ratify the appointment of Forvis Mazars, LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2026;

(3) To approve the compensation of the Company’s named executive officers through an advisory vote;

(4) To approve an amendment to the Company’s Restated Articles of Incorporation to modify shareholder approval requirements for certain fundamental transactions; and

(5) To transact such other business as may properly come before the Annual Meeting, or any adjournments or postponements thereof. As of the date of this Proxy Statement, the Board of Directors is not aware of any other such business.

The Company’s Board of Directors has fixed the close of business on April 6, 2026, as the record date for determining shareholders entitled to notice of, and to vote at, the Annual Meeting and at any adjournments or postponements thereof. Only shareholders of record as of the close of business on such date will be entitled to notice of, and to vote at, the Annual Meeting online or at any adjournments or postponements thereof. If there are insufficient votes for a quorum or to approve or ratify any of the foregoing proposals at the time of the Annual Meeting, the Annual Meeting may be adjourned to permit further solicitation of proxies by the Company.

It is important that your shares be represented and voted at the meeting, regardless of the number of shares you own. Even if you plan to attend the Annual Meeting, you are encouraged to vote your shares promptly online, by telephone, or by completing and returning a physical proxy card. Voting instructions are included in this Proxy Statement and printed on the proxy card. You can revoke a proxy before it is exercised at the meeting by following the instructions in the Proxy Statement.

By Order of the Board of Directors

Kelly M. Dvorak, Corporate Secretary

Manitowoc, Wisconsin

April 24, 2026

IMPORTANT NOTICE REGARDING THE AVAILABILITY OF

PROXY MATERIALS FOR THE ANNUAL SHAREHOLDER MEETING TO BE HELD ON JUNE 15, 2026:

The notice of the annual meeting, proxy statement, proxy card and the 2025

annual report for the period ending December 31, 2025, are available

athttps://www.envisionreports.com/BFC

Whether or not you plan to attend the meeting, please vote online, by telephone,

or by completing and returning a physical proxy card.