Eduardo Saverin

While his former classmates celebrate Facebook's IPO at their new Menlo Park, California digs, company co-founder Eduardo Saverin may well be miles away, perhaps in his new home in Singapore. Saverin, immortalized in The Social Network as Mark Zuckerberg's onetime best friend, started the company with the current CEO at Harvard. The Brazilian-born Saverin apparently provided early seed money, earning him a one-third stake. This fell to 30% when Zuckerberg's roommate, Dustin Moskovitz, joined. When the others dropped out of school to relocate to California, Saverin stayed behind. Facebook later sued him for allegedly interfering with business and insisting on keeping a 30% stake; Saverin countersued. The parties settled, with Saverin apparently receiving a 5% stake and a co-founder bio on Facebook's site. With Facebook filing paperwork with the SEC in February to go public, Saverin stands to make quite a bit of money, even with his dramatically reduced stake in the company. Now a resident of Singapore, he has since sold more than half his stake in Facebook and has started to invest in startups including Qwiki and Jumio, which created the online payment Netswipe.