Shares: 533 million
Worth: $20.3 billion
The founder and CEO, Zuckerberg has maintained undisputed control of his company as he’s grown it from dorm-room startup to international phenomenon. And if anyone can be said to deserve the massive payoff that will come with Facebook’s IPO, it’s him. Over the course of a whirlwind eight years, Zuckerberg went toe-to-toe with Cameron and Tyler Winklevoss, built the nascent company’s staff, struck a deal to sell a 1.6 percent take to Microsoft, developed Chat and the News Feed, and moved his company to new offices at 1 Hacker Way in Menlo Park, California.