World's 20 Most Valuable Private Tech Companies


#2 Bloomberg

Estimated Value: $35 billion

Last Year's Rank: N/A

Business: Business and financial market media outlet

Location:  New York, New York

CEO: Daniel Doctoroff

In 2008, the company was worth an estimated $25 billion. Bloomberg's 2011 revenue was $7.6 billion, up 10.5% from 2010.

Although Bloomberg is comprised of many different businesses including financial news and data service to computer software, at its core, it is a media company. It had a healthy 5X multiple on 2011 revenue for a valuation for $35 billion.

#1 Alibaba Group

Estimated Value: $40 billion

Last Year's Rank: N/A

Business: Alibaba is a B2B ( business to business) marketplace for international and domestic China trade.

Location: Hangzhou, China

CEO: Jack Ma

Yahoo recently sold half its stake in Alibaba, following the restructuring measures to help the ailing tech giant. Currently, the Chinese e-commerce giant is valuated at $40 billion. It's the largest private non-LBO financing ever for a technology company globally.

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