More under 40s: Mobilizers

These stars didn't make the main list, but these young innovators are making waves on mobile platforms and beyond.

Henry Lin and Omar Khan
40u40 henry lin omar khan NEW
Age: Lin: 35; Khan: 37

Co-CEOs, NQ Mobile

Smartphone, $200. Protective case, $30. All that personal data on your mobile device? Priceless. It's little wonder that Lin, a professor who founded his mobile security business with $15,000 and a few grad students in 2005, is doing well. The Chinese company now makes the majority of its revenue overseas, and it's growing quickly -- revenues of $20 million jumped 125% last quarter, and they've risen more than 10-fold since 2008.

Khan, who worked for mobile giants like Motorola and Samsung in the past, signed on as Lin's co-CEO earlier this year. His mission? To raise NQ's profile and international reach beyond its current 204 million users in 150 countries. He expects the growing popularity of mobile payments and electronic health records will help. —Erika Fry

- Last updated October 11 2012 03:32 PM ET
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Fortune's 40 Under 40

Who are 2012's young business stars? We've got the CEO of a blue-chip beer brand, an airline CEO who just placed the largest order in commercial aviation history, and Warren Buffett's new prodigy, among the Silicon Valley hotshots and others.

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