Mukesh Ambani

His oil and gas conglomerate Reliance Industries, India's most valuable company, just forged a partnership with BP, selling 30% stake in 23 oil blocks in India for $7.2 billion and forming a marketing joint venture. The deal is being touted as one of biggest foreign investments in India. He's also betting on shale gas, having bought stakes in three American energy firms for $3.3 billion last year. He and wife Nita host parties at their recently completed 27-story sky palace in Mumbai, but have still to move in permanently.