Sumner Murray Redstone was an American billionaire businessman and media magnate. He was the founder and chairman of the second incarnation of Viacom, chairman of CBS Corporation, and the majority owner and chairman of the National Amusements theater chain.

A business magnate, also known as an industrialist or tycoon, is a person who has achieved immense wealth through the creation or ownership of multiple lines of enterprise. The term characteristically refers to a powerful entrepreneur and investor who controls, through personal enterprise ownership or a dominant shareholding position, a firm or industry whose goods or services are widely consumed. Such individuals have been known by different terms throughout history, such as robber barons, captains of industry, moguls, oligarchs, plutocrats, or tai-pans.