UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

SCHEDULE 14A

(RULE 14a-101)

INFORMATION REQUIRED IN PROXY STATEMENT

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934 (Amendment No. )

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Preliminary Proxy Statement

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Definitive Proxy Statement

Definitive Additional Materials

Soliciting Material Pursuant to § 240.14a-12

BANK FIRST CORPORATION

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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www.investorvote.com/BFC Step 1: Go to www.investorvote.com/BFC. Step 2: Click on the icon on the right to view meeting materials. Step 3: Return to the investorvote.com window and follow the instructions on the screen to log in. Online Go to www.investorvote.com/BFC or scan the QR code — login details are located in the shaded bar below. Shareholder Meeting Notice 038T0D + + Important Notice Regarding the Availability of Proxy Materials for the Bank First Corporation Shareholder Meeting to be Held on June 8, 2020. Under Securities and Exchange Commission rules, you are receiving this notice that the proxy materials for the annual shareholders’ meeting are available on the Internet. Follow the instructions below to view the materials and vote online or request a copy. The items to be voted on and location of the Annual Meeting are on the reverse side. Your vote is important! This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. We encourage you to access and review all of the important information contained in the proxy materials before voting. The proxy statement and annual report to shareholders are available at: Obtaining a Copy of the Proxy Materials – If you want to receive a copy of the proxy materials, you must request one. There is no charge to you for requesting a copy. Please make your request as instructed on the reverse side on or before May 29, 2020 to facilitate timely delivery. 2 N O T Easy Online Access — View your proxy materials and vote. When you go online, you can also help the environment by consenting to receive electronic delivery of future materials. Votes submitted electronically must be received by 11:59 p.m. (CT) on June 7, 2020 Step 4: Make your selections as instructed on each screen for your delivery preferences. Step 5: Vote your shares. MMMMMMMMMMMM MMMMMMMMM MR A SAMPLE DESIGNATION (IF ANY) ADD 1 ADD 2 ADD 3 ADD 4 ADD 5 ADD 6 ENDORSEMENT_LINE______________ SACKPACK_____________ 1234 5678 9012 345 C 1234567890 C O Y

Shareholder Meeting Notice Bank First Corporation's Annual Meeting of Shareholders will be held on Monday, June 8, 2020 at Holy Family College - Franciscan Center for Music Education and Performance (2406 S. Alverno Road, Manitowoc, WI 54220) at 4:00 pm CDT. We are actively monitoring the Coronavirus (COVID-19) pandemic. We are sensitive to the public health and travel concerns our shareholders may have and the protocols and restrictions imposed by the federal government and state of Wisconsin. In the event that it is not possible or advisable to hold our Annual Meeting in person, we will announce alternative arrangements for the meeting as promptly as practicable, which may include holding the meeting solely by means of remote communication. Please monitor our Annual Meeting website at www.envisionreports.com/BFC for updated information. If you are planning to attend our Annual Meeting, please check the website one week prior to the meeting date. As always, we encourage you to vote your shares prior to the meeting date. Proposals to be voted on at the meeting are listed below along with the Board of Directors’ recommendations. The Board of Directors recommends a vote FOR all nominees listed and FOR Proposals 2-4: 1. Election of Directors: 01 - Donald R. Brisch 02 - Michael P. Dempsey 03 - Robert W. Holmes 04 - Stephen E. Johnson 05 - David R. Sachse 2. To ratify the appointment of Dixon Hughes Goodman, LLP as the Corporation's independent registered public accounting firm. 3. To approve the 2020 Equity Plan of Bank First Corporation. 4. Such other business as may properly come before the meeting or any adjournments or postponements thereof. PLEASE NOTE – YOU CANNOT VOTE BY RETURNING THIS NOTICE. To vote your shares you must go online or request a paper copy of the proxy materials to receive a proxy card. If you wish to attend and vote at the meeting, please bring this notice with you. Here’s how to order a copy of the proxy materials and select delivery preferences: Current and future delivery requests can be submitted using the options below. If you request an email copy, you will receive an email with a link to the current meeting materials. PLEASE NOTE: You must use the number in the shaded bar on the reverse side when requesting a copy of the proxy materials. — Internet – Go to www.investorvote.com/BFC. — Phone – Call us free of charge at 1-866-641-4276. — Email – Send an email to investorvote@computershare.com with “Proxy Materials Bank First Corporation” in the subject line. Include your full name and address, plus the number located in the shaded bar on the reverse side, and state that you want a paper copy of the meeting materials. To facilitate timely delivery, requests for a paper copy of proxy materials must be received by May 29, 2020.