Globally , large media conglomerates include Bertelsmann ( BMG ) , National Amusements ( Viacom Inc. and CBS Corporation ) , 21st Century Fox Inc ( merging with Disney on January 1 , 2019 ) , Sony Corporation , Comcast , The Walt Disney Company , AT & T Inc. , News Corp , Hearst Communications , MGM Holdings Inc. , Grupo Globo ( South America ) and Lagardère Group .
21st Century Fox Inc will merge with Disney after January 15 , 2019 .