: 27 Net Worth
: $17.5 billion
Don't let the hoodie and the sandals fool you, the Facebook founder controls 56.9 percent of firm's total pre-IPO voting power. The company's IPO is expected to hit in the next few months, possibly boosting his net worth even higher. Zuckerberg is only 8 days older than former roommate Dustin Moskovitz.
(Photo: Justin Sullivan/Getty Images) More From Forbes: The World’s Billionaires The World’s Billionaire Newcomers The World’s Billionaire Dropoffs The Oldest Billionaires in the World The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.