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.

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

Director: Three new directors were elected to the Board of Directors.

Director — Stephen E. Johnson: Stephen E. Johnson retired from the Board of Directors, with new directors elected.

Other Events On May 19, 2026, BFC and PSB issued a joint press release announcing the entry into the Merger Agreement. A copy of the joint press release is filed as Exhibit 99.1 attached hereto and incorporated by reference herein. In connection with the announcement of the Merger Agreement, BFC intends to provide supplemental information regarding the proposed transaction in connection with presentations to analysts and investors. The slides that will be made available in connection with the…

Entry Into a Material Definitive Agreement On May 19, 2026, Bank First Corporation, a Wisconsin corporation (“BFC”), entered into an Agreement and Plan of Merger (the “Merger Agreement”) with PSB Holdings, Inc., a Wisconsin corporation (“PSB”), whereby PSB will be merged with and into BFC (the “Merger”). Pursuant to entering into the Merger Agreement, BFC’s wholly-owned subsidiary bank, Bank First, N.A. (“Bank First”), and PSB’s wholly-owned subsidiary bank, Peoples State Bank (“Peoples State…

Regulation FD Disclosure On April 21, 2026, Bank First Corporation (the “Company”) renewed its share repurchase program, pursuant to which the Company may repurchase up to $60 million of its common stock, per year for a period of two (2) years, ending on April 20, 2028. The Company may repurchase shares from time to time in open market transactions or through privately negotiated transactions at the Company’s discretion and in accordance with applicable securities laws. The timing, price, vol…

Results of Operations and Financial Condition. On April 16, 2026, Bank First Corporation (the “Company”) announced its earnings for the quarter ended March 31, 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

that the Company had completed its previously-announced merger (the “Merger”) with Centre 1 Bancorp, Inc., a Wisconsin corporation (“Centre”), pursuant to that certain Agreement and Plan of Merger by and between BFC and Centre, dated as of July 17, 2025 (the “Merger Agreement”). At the closing, Centre merged with and into BFC, with BFC as the surviving corporation, followed by the merger of Centre’s wholly-owned subsidiary bank, The First National Bank and Trust Company, with and into the BFC…

Results of Operations and Financial Condition. On January 22, 2026, Bank First Corporation (the “Company”) announced its earnings for the quarter ended December 31, 2025. 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

Director — Steven M. Eldred: Election of a new director to the Board of Directors.

Completion of Acquisition or Disposition of Assets. Effective January 1, 2026, Bank First Corporation, a Wisconsin corporation (“BFC”), completed its previously-announced merger (the “Merger”) with Centre 1 Bancorp, Inc., a Wisconsin corporation (“Centre”), pursuant to that certain Agreement and Plan of Merger by and between BFC and Centre, dated as of July 17, 2025 (the “Merger Agreement”). At the effective time of the Merger, Centre merged with and into BFC, with BFC continuing as the survi…

Results of Operations and Financial Condition. On October 21, 2025, Bank First Corporation (the “Company”) announced its earnings for the quarter ended September 30, 2025. 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

Director — Todd A. Sprang: Election of a new director to the Board of Directors.

Results of Operations and Financial Condition. On July 18, 2025, Bank First Corporation (the “Company”) announced its earnings for the quarter ended June 30, 2025. 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

Entry Into a Material Definitive Agreement On July 17, 2025, Bank First Corporation, a Wisconsin corporation (“BFC”), entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Centre 1 Bancorp, Inc., a Wisconsin corporation (“Centre”), whereby Centre will be merged with and into BFC (the “Merger”). Pursuant to entering into the Merger Agreement, BFC’s wholly-owned subsidiary bank, Bank First, N.A. (“Bank First”), and Centre’s wholly-owned subsidiary bank, The First National B…

Other Events On July 18, 2025, BFC and Centre issued a joint press release announcing the entry into the Merger Agreement. A copy of the joint press release is filed as Exhibit 99.1 attached hereto and incorporated by reference herein. In connection with the announcement of the Merger Agreement, BFC intends to provide supplemental information regarding the proposed transaction in connection with presentations to analysts and investors. The slides that will be made available in connection with…

Director — Laura E. Kohler: Laura E. Kohler retired from the Board of Directors and was succeeded by new directors Daniel C. McConeghy and Michael S. Stayer-Suprick.

Regulation FD Disclosure On April 25, 2025, the Board of Directors of Bank First Corporation (the “Company”) declared a special cash dividend of $3.50 per share payable on May 16, 2025 to shareholders of record on May 9, 2025. A copy of the press release is attached as Exhibit 99.1 to this Current 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

Results of Operations and Financial Condition. On April 15, 2025, Bank First Corporation (the “Company”) announced its earnings for the quarter ended March 31, 2025. 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

Director — Judy L. Heun: Judy L. Heun retired from the Board of Directors.

Regulation FD Disclosure On February 18, 2025, Bank First Corporation (the “Company”) renewed its share repurchase program, pursuant to which the Company may repurchase up to $50 million of its common stock, par value $0.01 per share, for a period of one (1) year, ending on February 17, 2026. The Company may repurchase shares from time to time in open market transactions or through privately negotiated transactions at the Company’s discretion and in accordance with applicable securities laws.…

Senior Vice President of Operations — Kristeen Pelot: Kristeen Pelot resigned from her position as Senior Vice President of Operations.

Results of Operations and Financial Condition. On January 21, 2025, Bank First Corporation (the “Company”) announced its earnings for the quarter ended December 31, 2024. 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

Director — Daniel C. McConeghy: Election of a new director for a three-year term.