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Common stock (Tables)
3 Months Ended
Mar. 31, 2019
Equity [Abstract]  
Changes in issued, treasury and outstanding Berkshire common stock

Changes in Berkshire’s issued, treasury and outstanding common stock during the first quarter of 2019 are shown in the table below. In addition to our common stock, 1,000,000 shares of preferred stock are authorized, but none are issued.

 

     Class A, $5 Par Value
(1,650,000 shares authorized)
   Class B, $0.0033 Par Value
(3,225,000,000 shares authorized)
     Issued    Treasury    Outstanding    Issued    Treasury   Outstanding

Balance December 31, 2018

     742,213        (12,897      729,316        1,373,558,983        (6,138,909     1,367,420,074  

Conversions of Class A common stock to Class B common stock and exercises of replacement stock options

     (4,303             (4,303      6,616,673              6,616,673  

Treasury stock acquired

            (1,258      (1,258             (6,519,830     (6,519,830
  

 

 

 

  

 

 

 

  

 

 

 

  

 

 

 

  

 

 

 

 

 

 

 

Balance at March 31, 2019

     737,910        (14,155      723,755        1,380,175,656        (12,658,739     1,367,516,917