Viacom Inc. ( VY-ə-kom or VEE-ə-kom) is an American multinational mass media conglomerate with interests primarily in film and television. It is currently the world's ninth largest broadcasting, cable, and media company in terms of revenue, and has headquarters in New York City. Voting control of Viacom is held by National Amusements, Inc., a privately owned theater company controlled by billionaire Sumner Redstone, who also holds a controlling stake in CBS Corporation.The present-day Viacom was created as a spin-off from the original company, which was renamed as CBS Corporation afterwards, on December 31, 2005. The latter currently retains control of the over-the-air broadcasting, TV production, subscription pay television, and publishing assets, which were previously owned by the original Viacom. Comprising BET Networks, Viacom Media Networks, and Paramount Pictures, Viacom operates approximately 170 networks, reaching approximately 700 million subscribers in approximately 160 countries.