Interesting find
Who owns Time Warner?
Warner Media, LLC is an American multinational mass media and entertainment conglomerate owned by AT&T and headquartered in New York City.Wikipedia
https://en.wikipedia.org/wiki/WarnerMedia
Who owns CNN?
CNN (Cable News Network) is an American news-based pay television channel owned by AT&T’s WarnerMedia. CNN was founded in 1980 by American media proprietor Ted Turner as a 24-hour cable news channel.
https://en.m.wikipedia.org/wiki/CNN
Who owns NBC?
a flagship property of NBCUniversal, a subsidiary of Comcast. The network is headquartered at 30 Rockefeller Plaza in New York City, with additional major offices near Los Angeles (at 10 Universal City Plaza), Chicago (at the NBC Tower) and Philadelphia (at the Comcast Technology Center). The network is one of the Big Three television networks. NBC is sometimes referred to as the “Peacock Network”, in reference to its stylized peacock logo, introduced in 1956 to promote the company’s innovations in early color broadcasting. It became the network’s official emblem in 1979.
https://en.m.wikipedia.org/wiki/NBC
Who owns ABC?
The American Broadcasting Company (ABC) is an American commercial broadcast radio and television network owned by the Disney Media Networks division of The Walt Disney Company. The network is headquartered in Burbank, California, on Riverside Drive, directly across the street from Walt Disney Studios and adjacent to the Roy E. Disney Animation …
https://en.m.wikipedia.org/wiki/American_Broadcasting_Company
Who owns CBS?
CBS Corporation was an American multinational media conglomerate with interests primarily in commercial broadcasting, publishing, and television production which was formed as the legal successor to the first incarnation of Viacom on January 1, 2006.Wikipedia
https://en.wikipedia.org/wiki/CBS_Corporation
https://www.quora.com/Who-owns-ABC-NBC-and-CBS
Now…. Who owns AT&T?
https://stockzoa.com/ticker/t/
Who owns Disney?
https://www.reference.com/business-finance/owns-walt-disney-company-eff9d9a487a18f32
Steve Jobs widow and look at the Vanguard group.
Who owns Viacom?
2019Viacom is a publicly traded company, owned by shareholders. Controlling stock in the company is owned by a private company called National Amusements. The owners of 
National Amusements are the Redstone family, led by Viacom founder Sumner Redstone…
National amusements. A name that keeps popping up.
https://www.quora.com/Who-owns-Viacom
Some history:
2010Viacom (post-2006) owns Paramount Pictures, and the Viacom Media Networks (formerly MTV Networks). CBS owns the 1971-2005 Viacom a.k.a CBS Corporation, which gives them the rights to the Paramount …
Ok, Who owns National Amusements?
National Amusements, Inc. is an American privately-owned theater company and mass media holding company based in Dedham, Massachusetts and incorporated in Maryland. It was the parent company of the first incarnation of Viacom, CBS Corporation and the second incarnation of Viacom that were split off in 2006; the two separated companies has been re-merged to form ViacomCBS in 2019. At the end of 2008, due to financial troubles, owners Sumner Redstone and Shari Redstone sold $400 million of nonvoting shares in National Amusements. In October 2009, the company sold almost $1 billion of its interest in the stock of CBS and Viacom and sold 35 theaters to Rave Motion Pictures. Today these theatres are owned by Cinemark, AMC, Alamo, or have closed. National Amusements now almost exclusively operates theaters in the Northeastern United States. The following year, National Amusements planned to sell $390 million of notes to refinance a large part of the company’s bank owed debt.Wikipedia
https://en.wikipedia.org/wiki/National_Amusements