Photo by Kevork Djansezian/Getty Images Groupon’s earliest investor and co-founder Eric Lefkofsky has transferred 18.7 million shares of the company, Bloomberg reports. Bloomberg confirmed the transfer, found in a regulatory filing, with a Groupon spokesperson. Most of the shares, 15.4 million, were moved from 600 West Groupon LLC and distributed to Lefkofsky’s beneficiaries. 600...