[1] Sook is also the Chairman of the Joint Board of Directors of the National Association of Broadcasters.
[2] Sook founded Nexstar in 1996, with the acquisition of a single local television station in Scranton, Pennsylvania.
In the decades since, the corporation has grown into the largest owner of television stations in the United States, in addition to amassing additional media holdings such as The Hill.
Sook's compensation at Nexstar, over $40 million in 2022, made him the highest paid corporate executive in the Dallas-Fort Worth region.
[3] The editorial board of Variety named Sook to the 2023 edition of the Variety500, a list of top entertainment industry leaders.