MICHAEL Sorkin, 27

CoFounder, iGo3d germany When Sorkin was 12, his family fled russia and settled in Berlin. In 2010, he dropped out of college (“I was frustrated—I wanted to build things”) to found iGo3d, a 3-d-printer distributor that now does over $28 million in revenue. the company sells printers directly to retail chains including Staples.