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( Mark One ) 1000 Alfred Nobel Drive , 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 year ended December 31 , 2020 OR □ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from Registrant's telephone number , including area code Delaware ( State or other jurisdiction of incorporation or organization ) Large accelerated filer Non - accelerated file Commission file number 1-7928 BIO - RAD LABORATORIES , INC . ( Exact name of registrant as specified in its charter ) Hercules , ( Address of principal executive offices ) ( 1 ) California to ( 510 ) 724-7000 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbols BIO BIOb 94-1381833 ( I.R.S. Employer Identification No. ) Title of Each Class Class A Common Stock Par Value $ 0.0001 per share Class B Common Stock Par Value $ 0.0001 per share 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 Act . 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 . 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 during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . 94547 ( Zip Code ) Name of Each Exchange on Which Registered New York Stock Exchange New York Stock Exchange 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 . Document Definitive Proxy Statement to be mailed to stockholders in connection with the registrant's 2021 Annual Meeting of Stockholders ( specified portions ) 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 □ Yes Accelerated filer Smaller reporting company Emerging growth company Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , 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 . As of February 10 , 2021 , there were 24,768,670 shares of Class A Common Stock and 5,075,386 shares of Class B Common Stock outstanding . Documents Incorporated by Reference 冈 Yes X X No Yes No III Yes > 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 Class A Common Stock held by non - affiliates was approximately $ 9,501,744,303 and the aggregate market value of the registrant's Class B Common Stock held by non - affiliates was approximately $ 85,986,722 . Form 10 - K Parts " No " No 0 0 0