Winner: Catalyst Public Relations

Founded four years ago, Catalyst focuses on three distinct practice areas: sports, active lifestyle, and entertainment. With three offices across the US, the agency works with a select roster of 15 brands, including Under Armour and Subway Restaurants. This model allows the agency's most senior people to work very closely on accounts, something which helped to contribute to the agency's 94% client-retention rate.

Each year, the firm conducts a client survey to measure overall performance, service challenges, ...