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18. Virgin Media
Virgin Media
Fortune 500 rank: 313
2007 loss: $927.6 million

Virgin Media was created last year after a U.S.-based cable company bought Richard Branson's Virgin Mobile, the U.K.'s largest mobile services provider. Branson's Virgin Group is the largest shareholder of the new company, which offers a package of cable, broadband, landline phone, and mobile to U.K. customers, and has seen subscriptions rise in the past year.

But a heavy debt load and a fierce price war in the U.K. have produced a string of big losses. It's a rumored target of private equity heavyweights like Blackstone and KKR.

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Last updated April 24 2008: 11:01 AM ET
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