Jeff Bezos dethroned Elon Musk as the world's richest person with $200 billion in wealth. Musk is now second-richest person with $198 billion wealth. LVMH CEO Bernard Arnault ($197 billion) is third-richest, followed by Mark Zuckerberg ($179 billion), Bill Gates ($150 billion), Microsoft's ex-CEO Steve Ballmer ($143 billion), Warren Buffett ($133 billion) and Oracle's Larry Ellison ($129 billion).