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( Mark One ) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 26 , 2020 OR UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from Commission file number : 1-14092 Large accelerated filer Non - accelerated filer Massachusetts ( State or other jurisdiction of incorporation or organization ) Title of each class Class A Common Stock . $ 0.01 par value THE BOSTON BEER COMPANY , INC . ( Exact name of registrant as specified in its charter ) 0 0 0 to 04-3284048 ( I.R.S. Employer Identification No. ) One Design Center Place , Suite 850 , Boston , Massachusetts ( Address of principal executive offices ) Trading Symbol ( s ) SAM 02210 ( Zip Code ) ( 617 ) 368-5000 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : Yes No □ 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 . Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Exchange 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 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 an 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 . Name of each exchange on which registered New York Stock Exchange 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 . 0 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 No 区 The aggregate market value of the Class A Common Stock ( $ .01 par value ) held by non - affiliates of the registrant totaled $ 5,952.53 million ( based on the average price of the Company's Class A Common Stock on the New York Stock Exchange on June 27 , 2020 ) . All of the registrant's Class B Common Stock ( $ .01 par value ) is held by an affiliate . As of February 12 , 2021 , there were 10,088,372 shares outstanding of the Company's Class A Common Stock ( $ .01 par value ) and 2,177,983 shares outstanding of the Company's Class B Common Stock ( $ .01 par value ) . DOCUMENTS INCORPORATED BY REFERENCE Certain parts of the registrant's definitive Proxy Statement for its 2021 Annual Meeting to be held on May 20 , 2021 are incorporated by reference into Part III of this report .