5Sean Parker – Age 34
At the age of 10, Sean Parker launched the program Napster, the fastest growing business of all time.
Born on December 3, 1979, the oldest of the Facebook group has an estimated net worth of $2.1 billion.
He was the first president of Facebook, as well as the co-founder of Plaxo, Airtime and Causes.
Currently, he serves on the Board of Directors for major Internet companies, such as Yammer and Spotify.