Warren Buffett is a businessman.
Warren Edward Buffett ( [ ˈbʌfᵻt ] born August 30 , 1930 ) is an American business magnate , investor , and philanthropist . He is considered by some to be one of the most successful investors in the world , and as of March 2017 is the second wealthiest person in the United States , and the fourth wealthiest in the world , with a total net worth of $ 73.3 billion . Buffett has been the chairman and largest shareholder of Berkshire Hathaway since 1970 , and his business exploits have had him referred to as the `` Wizard '' , `` Oracle '' or `` Sage '' of Omaha by global media outlets .