Warren Buffett's Philanthropy Surpasses $51 Billion with Latest Donations.

Warren Buffett has donated $4.64 billion of Berkshire Hathaway stock to five charities, bringing his total giving since 2006 to over $51 billion. The annual donation is Buffett's largest and includes 10.45 million shares to the Bill & Melinda Gates Foundation, 1.05 million shares to the Susan Thompson Buffett Foundation, and 2.2 million shares split evenly among charities led by his children. Buffett is gradually giving away nearly all of his fortune and has already donated more than half of his Berkshire stock. He and Bill Gates pioneered the Giving Pledge, in which more than 240 people committed at least half of their wealth to philanthropy.