Infinity Broadcasting to Become CBS Radio

Viacom, the No. 3 United States media company, will rename the Infinity Broadcasting unit CBS Radio after the split of its businesses into two companies.

Infinity, which includes 179 stations, will be part of the CBS Corporation after the split. CBS Radio will continue to be run by Joel Hollander, Viacom said yesterday in a statement.

The separation of Viacom into two businesses will be complete by Dec. 31, the company said this week. The CBS business, run by Leslie Moonves, will also include the CBS television network and the publisher Simon & Schuster. MTV Networks and Paramount Pictures, the movie studio, will be part of the new Viacom.

The name change takes CBS back to its roots. The original CBS Radio was founded in 1928. Viacom, which is based in New York, acquired a stake in the Infinity Broadcasting Corporation as part of its purchase of CBS in 2000 and bought the rest the next year.

Class B shares of Viacom fell 22 cents, to $34.58.