Eike Batista

Vowing to become world's richest man—and he may be on his way. This year's biggest gainer added $19.5 billion to his personal balance sheet. Son of Brazil's revered former mining minister who presided over mining giant Companhia Vale do Rio Doce got his start in gold trading and mining. Insists Dad didn't help: "All my businesses started from zero. My father was a problem for me because he never let me near Vale." Made a pile in resources and other services, but two-thirds of his fortune comes from relatively new source, OGX, the oil-and-gas exploration company he founded in 2007 and took public a year later. Police raided his home in 2008, alleging Batista smuggled gold and unfairly influenced the acquisition of a railroad. He denied all wrongdoing, emerged unscathed. New IPO for shipbuilding business (OSX) could raise $5.6 billion later this month—world's largest IPO so far this year. Onetime champion offshore powerboat racer; formerly married to Playboy cover girl. Provided financing to Rio de Janeiro's Olympic committee, helping the city win its bid for 2016 Olympic Games.