Disney
From humble beginnings as a cartoon studio in the 1920s, to today's major corporation, the walt disney company continues to pursue the goal of providing quality entertainment and a world of magic for the entire family
http://corporate.disney.go.com/corporate/complete_history.html
Turner (Broadcasting System)
Turner broadcasting system, inc. (tbs, inc.), a time warner company, is a major producer of news and entertainment product around the world and the leading provider of programming for the basic cable industry.
http://www.turner.com/about/corporate_history.html
Warner Bros
Warner Bros
http://www2.warnerbros.com/main/company_info/company_info.html