Sumner Murray Redstone (born Sumner Murray Rothstein; May 27, 1923) is an American businessman and media magnate.
He is the majority owner and chairman of the board of the National Amusements theater chain.
Through National Amusements, Redstone and his family are majority voting shareholders of ViacomCBS (itself the parent company of CBS, ViacomCBS Domestic Media Networks and the film studio Paramount Pictures).
According to Forbes, as of September 2015, he was worth US$5 billion.Redstone was formerly the executive chairman of both CBS and Viacom.
In February 2016, at age 92, Redstone resigned both chairmanships following a court-ordered examination by a geriatric psychiatrist.
He was ultimately succeeded by Les Moonves at CBS and Philippe Dauman at Viacom, where he currently serves as chairman emeritus.