Eduardo Eurnekian, a savvy son of Armenian immigrants, made his money through diverse industries. Last August, he sold his chain of airport duty-free shops to Swiss firm Dufry for $957 million. He holds an 84% stake in Aeropuertos Argentina 200, and owns private airports in Argentina, Italy, and Brazil. In 1994, he sold Argentina's largest cable TV station, Cablevision, to the U.S. firm TCI for $750 million. He has never married and has no children, but he has plenty of nephews and great-nephews who work with him.