Quiznos Sub

Known for its toasted submarine sandwiches, Denver-based Quiznos is a fast-casual chain that is privately held under parent company Avenue Capital Group, a New York City-based hedge fund that took a majority stake in the company in early 2012. Quiznos operates nearly 2,400 U.S. units and did $849 million in U.S. systemwide sales in 2011.