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( Mark One ) ☑ ☐ FORM 10 - Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31 , 2021 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-14905 BERKSHIRE HATHAWAY INC . ( Exact name of registrant as specified in its charter ) Delaware ( State or other jurisdiction of incorporation or organization ) 47-0813844 ( I.R.S. Employer Identification Number ) 3555 Farnam Street , Omaha , Nebraska 68131 ( Address of principal executive office ) ( Zip Code ) ( 402 ) 346-1400 ( Registrant's telephone number , including area code ) ( Former name , former address and former fiscal year , if changed since last report ) Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class Name of each exchange on which registered Trading Symbols Class A Common Stock BRK.A New York Stock Exchange Class B Common Stock BRK.B New York Stock Exchange 0.750 % Senior Notes due 2023 BRK23 New York Stock Exchange 1.125 % Senior Notes due 2027 BRK27 New York Stock Exchange 1.625 % Senior Notes due 2035 BRK35 New York Stock Exchange 1.300 % Senior Notes due 2024 BRK24 New York Stock Exchange 2.150 % Senior Notes due 2028 BRK28 New York Stock Exchange 0.625 % Senior Notes due 2023 BRK23A New York Stock Exchange 0.000 % Senior Notes due 2025 BRK25 New York Stock Exchange 2.375 % Senior Notes due 2039 0.500 % Senior Notes due 2041 BRK39 New York Stock Exchange BRK41 New York Stock Exchange 2.625 % Senior Notes due 2059 BRK59 New York Stock Exchange 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 , 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 . Large accelerated filer 冈 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 is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes ☐ Number of shares of common stock outstanding as of April 22 , 2021 : No ☑ Class A - Class B 637,990 1,326,572,128