Warren Buffett sent a surprise letter to Berkshire Hathaway shareholders on Monday. In the letter, the 94-year-old investor announced a $1.2 billion donation to four family foundations.

Warren Buffett said Friday he would convert 8,674 shares of Berkshire Hathaway Class A stock into 13.01 million Class B shares — with a value of $5.3 billion based on Thursday’s closing price ...

Warren Buffett's adult children — Susie, Howard and Peter Buffett — have long track records as philanthropists, giving away ...