The property mogul, who is an Omani citizen living in Dubai, re-enters the billionaire ranks based on new information about his vast holdings in the Middle East where he's developing two projects whose combined worth is $13 billion. The $9 billion Mohammed bin Rashid Al Maktoum City-District One, being built in partnership with Dubai's Meydan Group, will feature 1,500 luxury villas, man-made lagoons and beaches. Nearby is the upcoming Sobha Hartland, a complex of 280 villas, condos, a shopping mall and two international schools. His India-listed Sobha Developers is run by son Ravi.
Fast Fact: Menon, who plans to give away half his fortune (though he hasn't signed the Giving Pledge), says a fifth of his charity will be earmarked for Oman.