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Carlos Slim  Mexico  North America  Repsol YPF SA  Forbes Media LLC  Energy Sector  Fossil Fuel Energy Production 
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Carlos Slim is the richest man in the world with an estimated $69 billion fortune, according to Forbes magazine
Yuri Cortez
Mexico's Carlos Slim (pictured in April), the world's richest man, has acquired an 8.4 percent stake in YPF, the recently nationalized Argentine subsidiary of Spanish oil firm Repsol, according to the latest filings.