How America's Top Entrepreneurs Repeat Their Success

David Glickman should be busting his buttons with pride. His telecom company Ultra Mobile is ranked No. 1 on the Inc. 5000. In 1998, Glickman’s first telecom venture, Justice Technology, took the top spot. And in 2010, another Glickman telecom business—Hometown Telecom—landed at No. 81.

A remarkable achievement, obviously. But less remarkable than if Glickman had followed up his Justice Technology triumph with companies that made digital advertising platforms, fair trade coffee or socks.