Tech's Youngest Billionaires

The youngest billionaires in technology run the gamut from a social networking entrepreneur to the creator of the online coupon company, groupon.com.

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The nine youngest billionaires in technology run the gamut from a social networking entrepreneur to the creator of the online coupon company, groupon.com. There is one common link between them all though, their fortune started via theIinternet and continues to grow by the same means. Of course, these are just a few of the world's billionaires, visit Forbes.com for the complete list.

Think you know them all? Let's find out.

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9. Eric Lefkofsky

Worth: 1.6 billion

Source: Technology/self-made

Age: 41

Background Info: Chicago investor is cofounder and 30% owner of Groupon, which provides its many customers with exclusive deals to be found across the country. Lefkofsky met the founder of Groupon, Andrew Mason at InnerWorkings, a firm where Mason worked after college. Lefkofsky was a founder of the the firm itself.

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8. Sean Parker

Worth: 1.6 billion

Source: Facebook

Age: 31

Background Info: Former Facebook president debuts as a billionaire based on the value the social networking site. His share: just under 3%. At 19, the serial entrepreneur co-founded Napster in 1999, the music sharing service that brought free music to the masses. The disruptive technology helped trigger the record industry's precipitous decline. Parker joined Facebook in 2004. Recently made more famous after being played by Justin Timberlake in the Oscar-winning film "The Social Network."

Facebook Bible: Everything You Need to Know About Facebook

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7. Eduardo Saverin

Worth: 1.6 billion

Source: Facebook

Age: 28

Background Info: For a brief time he had control of one third of facebook, which then fell to 30% when Zuckerberg's roommate, Dustin Moskovitz, joined. When the others dropped out of school to relocate to California, Saverin stayed behind. A year later Facebook sued him for allegedly interfering with business and insisting on keeping a 30% stake; Saverin countersued. The parties settled, with Saverin apparently getting a 5% stake and a co-founder bio on Facebook's site.

Facebook Bible: Everything You Need to Know About Facebook

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6. Yoshikazu Tanaka

Worth: 2.2 billion

Source: Social Networking

Age: 34

Background Info: Founder of Gree, Japan's largest social networking website, which is overtaking rival billionaire Kenji Kasahara's Mixi. May be facing off with Facebook's Mark Zuckerberg soon; setting up shop in California. On global expansion kick: working with Tencent, the largest Internet service portal in China. Stock is up 35% over the past year; 5-for-1 stock split last fall.

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5. William Ding

Worth: 2.6 billion

Source: Internet/self-made

Age: 39

Background Info: Established Netease as an Internet portal in 1997 and has led the company through transformation into one of the world's largest online game companies. Wealth is up in the past year amid a 47% increase in revenue, to $847 million, and 21% rise in net profit to $343 million. A partner of Blizzard Entertainment of the U.S., Netease launched World of Warcraft: Wrath of the Lich King in China last August.

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4. Dustin Moskovitz

Worth: 2.7 billion

Source: Facebook

Age: 26

Background Info: Dustin Moskovitz, Mark Zuckerberg's Harvard roommate and Facebook's third employee, dropped out of Harvard and moved to California to work for the social-networking firm full-time. He was the first CTO and then became vice president of engineering. He left a few years later to start Asana, a software company that allows individuals and small companies to better collaborate. Reportedly sold around a 1% stake in Facebook last year but held onto an estimated 5% in the company, whose value has soared to $50 billion, based on the recent Goldman Sachs transaction.

Slideshow: CIO.com Teardown: Facebook CEO Mark Zuckerberg

Facebook Bible: Everything You Need to Know About Facebook

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3. Mark Zuckerberg

Worth: 19.8 billion

Source: Google

Age: 26

Background Info: Mark Zuckerberg's Facebook played a huge role in the organization of the recent revolts in Tunisia, Egypt, Yemen and Libya. President Obama claimed Facebook as an example of American innovation in his State of the Union Address. Later, Zuckerberg would sit next to Obama at a dinner with other tech titans like Steve Jobs, Eric Schmidt, Larry Ellison and John Doerr. Over the last year the 26-year-old's fortune surged 238% to $13.5 billion as investments from firms like Goldman Sachs boosted Facebook's valuation to $50 billion.

Slideshow: CIO.com Teardown: Facebook CEO Mark Zuckerberg

Facebook Bible: Everything You Need to Know About Facebook

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2. Sergey Brin

Worth: 19.8 billion

Source: Google

Age: 37

Background Info: Google cofounder Sergey Brin saw company stock rise 18% over the past year as Google maintained nearly two-thirds of the market for online search. Expanding influence in mobile sector by giving away its Android operating software to phone makers. Brin focuses on raising margins with Instant Search and building new businesses in communications.

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1. Larry Page

Worth: 19.8 billion

Source: Google

Age: 37

Background Info: Google has control of two-thirds of the market, and its influence keeps expanding as adoption of its Android mobile phone operating system soars. The stock is up 18% over the past year. A new age starts for the company in April when co-founder Larry Page takes over as the search giant's chief executive officer, replacing Eric Schmidt, who will become chairman.

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