Warner Brothers' is not believed to have a global alignment with any particular group and its account is handled by different agencies in different regions. Twentieth Century Fox's media business is handled by Zenith Optimedia and Carat in different markets.
In Singapore, Warner Brothers and Twentieth Century Fox have a strategic partnership.
Warner Bros. is one of the biggest film studios in the world and has several subsidiary companies including Warner Bros. Studios, Warner Bros. Pictures, Warner Bros. Interactive Entertainment, Warner Bros. Television, Warner Bros. Animation, Warner Home Video, New Line Cinema, TheWB.com and DC Comics. Warner owns half of The CW Television Network.
Time Warner, which owns Warner Bros., is the world's third largest entertainment conglomerate in terms of revenue (behind News Corporation and Disney), as well as the world's largest media conglomerate.
Twentieth Century Fox is one of the six major American film studios as of 2010. The studio is a subsidiary of News Corporation (NewsCorp), the media conglomerate owned by Rupert Murdoch.