With a large and diversified client list of radio and television stations in both large and small markets, Katz Media Group is the largest media representation firm in the United States. Founded in New York in 1888 by Emmanuel Katz, the advertising agency was the nation s first media representation firm.Today, with more than 2600 radio stations and 400 television stations retaining our services, Katz is the only media representation firm to serve multiple types of electronic media. Katz possesses leading market shares in the representation of radio and television stations. Headquartered in New York City, Katz Media Group has 21 regional offices and is a subsidiary of Clear Channel Communications.