Sergey Brin, co-founder of Google

Born in Moscow, Russia, when it was still part of the Soviet Union, Google co-founder Brin and his family emigrated from the U.S.S.R. when he was just 6 years old. While enrolled in a computer science Ph.D. program at Stanford University, Brin met Larry Page and eventually dropped out to start Google.

Today, Brin is responsible for Google's special projects like Google Glass and self-driving cars. He owns 16% of the company and has an estimated net worth of $24.4 billion.