BERKSHIRE HATHAWAY INC. To the Shareholders of Berkshire Hathaway Inc.:      In 2012, Berkshire achieved a total gain for its shareholders of $24.1 billion. We used $1.3 billion of that to repurchase our stock, which left us with an increase in net worth of $22.8 billion for the year. The per-share book value of both our Class A and Class B stock...Learn More