Ning Raises $15 Million More At $750 Million Valuation

08/22/2009 05:12 am ET | Updated May 25, 2011

In a quiet fundraising effort, Ning has raised $15 million more, a round that is valuing the social networking start-up at an eye-popping $750 million valuation.

In its last fundraising $60 million round a little more than a year ago, Ning was valued at $500 million.

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