9. Sergey Brin — $78.9 Billion

Born in the Soviet Union, Sergey Brin founded Google with Larry Page. The two met at Standford University when both of them were studying Computer Sciences. Brin comes from a family of intellectuals, his mother was a NASA Scientist while his father was a mathematician.

Famous quote: “Obviously, everyone wants to be successful, but I want to be looked back on as very innovative, very trusted and ethical and ultimately making a big difference in the world.”