The second incarnation of Viacom Inc. (ˈvaɪəkɒm or ˈviːəkɒm ; a portmanteau of Video & Audio Communications) was an American multinational mass media and entertainment conglomerate with interests primarily in film and television. It was established on December 31, 2005, as one of two companies which succeeded the original Viacom, alongside the second CBS Corporation. The controlling shareholder of both companies was National Amusements, a theater company headed by businessman Sumner Redstone. The split was structured so that the original Viacom changed its name to CBS Corporation and spun out its cable and film interests as a new Viacom.
The second Viacom operated Viacom Media Networks, through which it controlled approximately 170 networks and reached approximately 700 million subscribers in approximately 160 countries. Viacom's studio assets included Paramount Pictures, MTV Films, and Nickelodeon Animation Studio, as well as a 30% ownership stake in the Rainbow S.p.A. animation studio. CBS Corporation retained the over-the-air broadcasting, television production, pay television subscription service, and publishing assets, which were previously owned by the first Viacom. The second Viacom was the world's ninth-largest media company in terms of revenue and headquartered at One Astor Plaza in Midtown Manhattan, New York City.
Viacom would announce its second merger with CBS Corporation on August 13, 2019. The merger was completed on December 4, resulting in the creation of ViacomCBS (now Paramount Global).
In March 2005, the first Viacom announced plans of exploring the option of splitting the company into two publicly traded companies because of a stagnating stock price and the rivalry between Les Moonves and Tom Freston, longtime heads of CBS and MTV Networks, respectively. Also, the company was facing issues after MTV was banned from producing any more Super Bowl halftime shows after the Super Bowl Halftime Show controversy in 2004.