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Table of Contents ( Mark One ) UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 OR □ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-38676 BANK FIRST CORPORATION ( Exact name of registrant as specified in its charter ) Wisconsin ( State or other jurisdiction of incorporation or organization ) 402 North 8th Street Manitowoc , Wisconsin ( Address of principal executive offices ) Title of each class Common Stock , par value $ 0.01 per share 54220 ( Zip Code ) Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol BFC 39-1435359 ( I.R.S. Employer Identification No. ) ( 920 ) 652-3100 Registrant's telephone number , including area code Name of each exchange on which registered The Nasdaq Stock Market LLC Securities registered pursuant to Section 12 ( g ) of the Act : None Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes □ No Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes □ No Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes No □ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( §232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit and post such files ) . Yes > No □ Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company , or emerging growth company . See the definitions of " large accelerated filer , " " accelerated filer , " " smaller reporting company , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Large accelerated filer □ Non - accelerated filer Accelerated filer > Smaller reporting company 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 complying with any new or revised financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act . Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report . Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes f □ No As of June 30 , 2020 , the last business day of the Registrant's most recently completed second fiscal quarter , the aggregate market value of the Registrant's common stock held by non - affiliates of the registrant was $ 496 million , based on the closing sales price of $ 64.10 per share as reported on the Nasdaq Capital Market . As of March 12 , 2021 , 7,728,598 shares of common stock were outstanding . DOCUMENTS INCORPORATED BY REFERENCE Portions of the information required by Part III of this Annual Report are incorporated by reference from the Registrant's definitive Proxy Statement for the 2021 annual meeting of shareholders to be filed with Securities and Exchange Commission pursuant to Regulation 14A not later than 120 days after the end of the fiscal year covered by this Annual Report .