Always fun to look at the six companies that own practically everything:
Missing is CBS, which used to be Viacom, but both CBS and Viacom are controlled by Sumner Redstone. CBS owns all of this:
https://en.wikipedia.org/wiki/List_of_assets_owned_by_CBS Relevant to our thread, CBS owns Showtime, the Smithsonian Channel, Flix, 50% of the Pop network and part of AXS TV. Oh, and of course, 50% of The CW.
[edit] Also missing is AMC, which is its own company that also owns IFC, Sundance TV and WeTV as well as almost half of BBC America; Tribune, which owns WGN America and 30% of Food Network; and Scripps, which owns the other 70% of Food Network as well as HGTV, DIY Network, Cooking Channel, Great American Country and Travel Channel.