(Crain's) — Groupon Inc. co-founders Brad Keywell and Eric Lefkofsky are doubling down on their Lightbank investment fund, adding another $100 million over the past three months, according to people close to the fund.
http://www.chicagobusiness.com/article/20111005/NEWS08/111009953/lightbank-doubles-startup-investment-fund-to-200-million
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