Riccardo Zacconi (second from left), CEO of King Digital Entertainment celebrates after ringing the opening bell at the New York Stock Exchange (NYSE), in honor of King holding its initial public offering at the NYSE on March 26, 2014 in New York City. King is the maker of the popular mobile game Candy Crush. (Getty Images)
From underwater mining to luxury yachts, Mohammed Al Barwani has interests in a staggering range of industries. The chairman of MB Holding explains how he built the firm from scratch to become a billion-dollar player.