Atop the heap is Mexico's Carlos Slim Helu, who added $20.5 billion to his fortune, more than any other billionaire. The telecom mogul, who gets 62% of his fortune from America Movil ( AMX - news - people ), is now worth $74 billion and has pulled far ahead of his two closest rivals. Bill Gates, No. 2, and Warren Buffett, No. 3, both added a more modest $3 billion to their piles and are now worth $56 billion and $50 billion, respectively. Gates, who now gets 70% of his fortune from investments outside of Microsoft ( MSFT - news - people ), has actually been investing in the Mexican stock market and has holdings in Mexican Coke bottler Femsa and Grupo Televisa ( TV - news - people ).