Elon Musk has reclaimed the title of the world's richest person with a net worth of $187 billion. He is followed by LVMH's Bernard Arnault ($185 billion), Jeff Bezos ($117 billion) and Bill Gates ($114 billion). The list also includes Warren Buffett, Larry Ellison, Steve Ballmer and Larry Page. Mukesh Ambani ranks 10th with a fortune of $81.1 billion.