The second incarnation of Viacom Inc. was an American multinational mass media conglomerate with interests primarily in film and television, which was formed on December 31, 2005 as a spin-off of the original Viacom. It was one of two companies which succeeded the original Viacom, alongside the second incarnation of CBS Corporation; both were owned by National Amusements, a theater company controlled by businessman Sumner Redstone. The spin-off was structured so that CBS Corporation would be the legal successor to the first Viacom, with the second Viacom being an entirely separated company.