John Arnold, USA
Age: 34 Worth: $1.5 billion. John Arnold trades oil for Enron and earned the company 750 million in 2001.
Mark Zuckerberg, USA
Age: 26 Worth: 13.5 Billion. Mark is co-founder of the social netowrking site, Facebook.
Yang Huiyan, China
Age: 29 Worth: 7.4 Billion. Yang was given 70% of the shares for Country Garden Holdings before its stock went public.
Sergey Brin, USA
Age: 37 Worth: 19.8 Billion. Sergey Brin is co-founder of Google Inc.
Xiaofeng Peng, China 
Age: 33. Worth: $2.5 billion. Xiaofeng Peng owns LDK Solar which manufactures parts for solar panels.
Albert von Thurn und Taxis, Germany
Age: 24. Worth: 2.3 billion. Albert von Thurn und Taxis lives in a castle and inherited his money at 18.
Fahd Hariri, Lebanon
Age: 27 Worth: 2.3 Billion. Fahd Hariri is on the board for Beirut’s Future Television Network which covers most of the Middle East.