Back in the 1980s, Minneapolis built a reputation for world-class advertising agencies; today none of those firms are still locally owned. Minneapolis-based Periscope, however, now ranks among the five largest independent agencies in the U.S. Periscope tapped Liz Ross, with 20 years of industry experience, to succeed long-standing CEO Greg Kurowski. Ross is bringing in best-in-class talent from across the U.S. to build what Periscope calls the “agency of the future.” Periscope grew again with its June deal to buy Chicago-based Anthem Marketing Solutions, its first acquisition.