Carlos Slim Helú - $53.5 billion: The world's richest man is a telecom wiz, with $18.5 billion coming in in the last year. Helú also owns a construction conglomerate Impulsora del Desarrollo y el Empleo. He has stakes in Inbursa, The New York Times Co., and Bronco Drilling. The Mexican entrepreneur is seen here at a press conference in Mexico City in January.
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