9. News Corporation , often abbreviated to News Corp. , is the world's third-largest media conglomerate (behind The Walt Disney Company and Time Warner ) as of 2008, and the world's third largest in entertainment as of 2009. [ The company's Chairman & Chief Executive Officer is Rupert Murdoch . Time Warner , with major operations in film , television and publishing . Among its subsidiaries are New Line Cinema , Time Inc. , HBO , Turner Broadcasting System , The CW Television Network , TheWB .com , Warner Bros. , Kids' WB , Cartoon Network , Boomerang , Adult Swim , CNN , DC Comics , Hanna- Barbera , Cartoon Network Studios and Castle Rock Entertainment