N0.1 Dustin Moskovitz
Net Worth : $1.4 billionKnown for : Co-founder of Facebook
Age : 26
No.2 Mark Zuckerberg

Known for : Co-founder of Facebook
Age : 26 (May 14, 1984)
No.3 Scott Duncan Net Worth : $3.1 billion
Known for : pipelines(energy)
Age : 27
No.4 Eduardo Saverin

Known for : Co-founder of Facebook
Age : 28(May 22, 1984)
No.5 John Arnold

Known for : hedge funds- natural gas trading
Age : 36
No.6 Sergey Brin

Known for : Russian American computer scientist and co-founded Google Inc
Age : 37 (August 21, 1973)
No.7 Larry Page

Known for : computer scientist and co-founded Google Inc
Age : 37 (March 26, 1973)
No.8 Daniel Ziff

Age: 38
No.9 Lorenzo Fertitta

Age: 41
No.10 Jerry Yang

Source: Yahoo
Age: 41