arren Edward Buffett is an American business magnate, investor, and philanthropist. He is widely considered the most successful investor of the 20th century. Buffett is the chairman, CEO and largest shareholder of Berkshire Hathaway and consistently ranked among the world's wealthiest people. He was ranked as the world's wealthiest person in 2008 and as the third wealthiest person in 2011. In 2012, American magazine Time named Buffett one of the most influential people in the world.
Buffett is called the "Wizard of Omaha", "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 99 percent of his fortune to philanthropic causes, primarily via the Gates Foundation. On April 11, 2012, he was diagnosed with prostate cancer, for which he completed treatment in September 2012.
Buffett became a billionaire on paper when Berkshire Hathaway began selling class A shares on May 29, 1990, when the market closed at $7,175 a share. In 1998, in an unusual move, he acquired General Re for stock. In 2002, Buffett became involved with Maurice R. Greenberg at AIG, with General Re providing reinsurance. On March 15, 2005, AIG's board forced Greenberg to resign from his post as Chairman and CEO under the shadow of criticism from Eliot Spitzer, former attorney general of the state of New York. On February 9, 2006, AIG and the New York State Attorney General's office agreed to a settlement in which AIG would pay a fine of $1.6 billion. In 2010, the federal government settled with Berkshire Hathaway for $92 million in return for the firm avoiding prosecution in an AIG fraud scheme, and undergoing 'corporate governance concessions'.
In 2002, Buffett entered in $11 billion worth of forward contracts to deliver U.S. dollars against other currencies. By April 2006, his total gain on these contracts was over $2 billion. In 2006, Buffett announced in June that he gradually would give away 85% of his Berkshire holdings to five foundations in annual gifts of stock, starting in July 2006. The largest contribution would go to the Bill and Melinda Gates Foundation. In 2007, in a letter to shareholders, Buffett announced that he was looking for a younger successor, or perhaps successors, to run his investment business. Buffett had previously selected Lou Simpson, who runs investments at Geico, to fill that role. However, Simpson is only six years younger than Buffett.