From Fortune Magazine:
[Warren] Buffett has pledged to gradually give 85% of his Berkshire stock to five foundations. A dominant five-sixths of the shares will go to the world’s largest philanthropic organization, the $30 billion Bill & Melinda Gates Foundation, whose principals are close friends of Buffett’s (a connection that began in 1991, when a mutual friend introduced Buffett and Bill Gates).
At the current Berkshire stock value, Buffet, 75, plans to give away $37 billion, the largest philanthropic gift ever. In reality it may prove to be even more, as he is planning to give 5% of his current holdings each year — the total cash value of his holdings could well appreciate more than that annually.

