About Warren Buffett Warren Edward Buffett (born August 30, 1930) is an American investor, businessman, and philanthropist. He is one of the most successful investors in history, the primary shareholder and CEO of Berkshire Hathaway. Buffett is called the "Oracle of Omaha" or the "Sage of Omaha" and is noted for his adherence to the value investing philosophy and for his personal frugality despite his immense wealth. Buffett is also a notable philanthropist, having pledged to give away 85 percent of his fortune to the Gates Foundation. He also serves as a member of the board of trustees at Grinnell College.