Warren Edward Buffett is an American investor, industrialist, and philanthropist. He is widely regarded as one of the most successful investors in the world. Often called the "legendary investor, Warren Buffett", he is the primary shareholder, chairman, and CEO of Berkshire Hathaway.
Warren Buffett is the co-author of three books: The Intelligent Investor (1949), The Essays of Warren Buffett (1997), and The Snowball: Warren Buffett and the Business of Life (2008).
He is consistently ranked among the world's wealthiest people. He was ranked as the world's wealthiest person in 2008 and is the third wealthiest person in the world as of 2011. 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 frugality despite his immense wealth.
Buffett is also a notable philanthropist, having pledged to give away 99 percent of his fortune to philanthropic causes, primarily via the Gates Foundation. He also serves as a member of the board of trustees at Grinnell College.