SAN FRANCISCO (MarketWatch) -- Viacom Inc. said Wednesday after the closing bell that it is exploring the possible break-up of the company into separate publicly traded companies.

Viacom first announced the proposed move in June and said it is aiming to unlock the value in its cable networks and filmed entertainment businesses. Shares ended Tuesday down 37 cents at $32.80.

Viacom never managed to make a profit on Rock Band even when sales were better in 2008 and 2009. One key reason was that the media giant, whose other holdings include Paramount Pictures and MTV ...

Overall, however, Viacom revenue declined 3% to $3.3 billion for the quarter because of lower sales of advertising on its cable networks and movie DVDs. The company’s earnings per share ...

As a result, the company owns more than 310 channels across 180 countries, broadcasting in 46 languages with over 4.4 billion cumulative subscribers.