Per Wikipedia
https://en.wikipedia.org/wiki/Concentration_of_media_ownership
“As of 2018, the largest media conglomerates in terms of revenue rank Comcast, The Walt Disney Company, AT&T, CBS Corporation and Viacom per Forbes.
In nations described as authoritarian by most international think-tanks and NGOs, media ownership is generally something very close to the complete state control over information in direct or indirect ways.[citation needed]”