UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K/A

(Amendment No. 1)

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported)

July 21, 2026

Bank First Corporation

(Exact name of registrant as specified in its charter)

Wisconsin	001-38676	39-1435359
(State or other jurisdiction	(Commission	(IRS Employer
of incorporation)	File Number)	Identification No.)

402 North 8th Street, Manitowoc, WI	54220
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code

(920) 652-3100

N/A

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Ticker symbol(s)	Name of each exchange on which registered
Common Stock, par value $0.01 per share	BFC	The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for company with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Explanatory Note

This Amendment No. 1 to the Current Report on Form 8-K amends Item 2.02 of the Current Report on Form 8-K filed on July 21, 2026 (the “Original Form 8-K”) solely to correct an error in the second paragraph of page 1 of the press release furnished as Exhibit 99.1 thereto (the “Exhibit”). As previously furnished, the second paragraph of page 1 of the Exhibit reflected an incorrect date of the anticipated closing of the Peoples acquisition, which has been corrected on Exhibit 99.1 to this Amendment No. 1. No other changes have been made to the Original Form 8-K.

Item 2.02

Results of Operations and Financial Condition.

On July 21, 2026, Bank First Corporation (the “Company”) announced its earnings for the quarter ended June 30, 2026. A copy of the press release is attached as Exhibit 99.1 to this Report on Form 8-K and is incorporated herein by reference.

Pursuant to General Instruction B.2 of Form 8-K, the information in this Item 2.02 and Exhibit 99.1 is being furnished to the Securities and Exchange Commission and shall not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) or otherwise subject to the liabilities under that Section. Furthermore, the information in this Item 2.02 and Exhibit 99.1 shall not be deemed to be incorporated by reference into the filings of the Registrant under the Securities Act of 1933, as amended, or the Exchange Act.

Item 9.01

Financial Statements and Exhibits.

(d) Exhibits

Exhibit Number		Description of Exhibit
99.1		Press Release, dated July 21, 2026
104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	BANK FIRST CORPORATION


Date: July 21, 2026	By:	/s/ Kevin M. LeMahieu
		Kevin M. LeMahieu
		Chief Financial Officer

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