Savvy internet investor divided his Digital Sky Technologies into two parts last year. Thiel, who has apparently sold much of his Facebook stake, puts his money into companies and causes that are involved in trying to extend life, start new countries on ocean platforms, commercialize outer space, promote artificial intelligence and leapfrog DNA sequencing. Opened hedge fund Clarium Capital in New York in 2005 but moved operations back to California reportedly because the firm was facing losses its assets fell to $1.4 billion in January this year from a peak of $7.4 billion two years ago. Peter Thiel cofounded PayPal in 1998, sold it to Ebay in 2002 for $1.5 billion personally netting $60 million from the sale. He left in 2008 to start Asana, a software company that allows individuals and small companies to better collaborate. The two dropped out of Harvard and moved to California to work for the social-networking firm full-time he was its first chief technology officer and then vice president of engineering. He is just 8 days younger than his friend.

The world's youngest billionaire, Moskovitz was Mark Zuckerberg's Harvard roommate and Facebook's third employee. He's diving back into digital music with an investment in Spotify. Recently made more famous after being played by Justin Timberlake in the Oscar-winning film 'The Social Network.' He's currently a managing partner at Founders Fund, a venture capital firm that invests in tech companies. At 19, the serial entrepreneur co-founded Napster in 1999 brought free music to the masses, but quickly collapsed under piracy allegations. Silicon Valley strategist and former Facebook president makes his billionaire debut. Now living in Singapore, he recently invested in hot start-up Qwiki. The parties settled Saverin apparently got a 5% stake and a co-founder bio on Facebook's site. Later, Facebook sued him for allegedly interfering with business and insisting on keeping a 30% stake Saverin countersued. When others moved to California, Saverin stayed behind. His reaction? 'What I gleaned from viewing (the movie) was bigger and more important than whether the scenes and details included in the script were accurate.' Started Facebook with Zuckerberg at Harvard.

He was recently immortalized in the movie, The Social Network.

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