TOP FIVE YOUNGEST  BILLIONAIRES OF 2013

Dustin Moskovitz, Mark Zuckerberg's former roommate, no longer works at Facebook, the social networking giant that he co-founded. A signee of Bill Gates' and Warren Buffett's Giving Pledge, Moskovitz bikes to work, flies commercial, and pitches his own tent at Burning Man

No. 2: Mark Zuckerberg
Age: 28
Net Worth: $13.3 billion

Few CEOs of any age are under more media scrutiny than Mark Zuckerberg (who's only 8 days older than Moskovitz). Since taking Facebook public in May 2012, and getting married days later, the hoodie-wearing founder has seen his net worth rise and fall with every fluctuation of the stock price.

No. 3: Albert von Thurn und Taxis
Age: 29
Net Worth: $1.5 billion

Albert von Thurn und Taxis first appeared in Forbes' billionaire rankings at age 8 but officially inherited his fortune in 2001 on his 18th birthday. The eligible bachelor is also a race car driver and tours with a German auto-racing league.

No. 5: Eduardo Saverin
Age: 30
Net Worth: $2.2 billion


Facebook co-founder Eduardo Saverin renounced his United States citizenship in 2011, news of which broke days before the company's IPO and drew accusations of tax evasion. Saverin, immortalized in The Social Network as Mark Zuckerberg's onetime best friend, settled a lengthy legal battle with Facebook, apparently receiving a 5% stake. A Brazilian citizen, he now resides in Singapore and invests in startups.