an American businessman who has been the chief executive officer of Microsoft Corporation since January 2000.[2] Ballmer is the second person after Roberto Goizueta to become a billionaire in U.S. dollars based on stock options received as an employee of a corporation in which he was neither a founder nor a relative of a founder. In Forbes 2008 World's Richest People ranking, Ballmer was ranked the 43rd richest person in the world, with an estimated wealth of $11 billion.