By Alistair Barr, MarketWatch

The division currently owns five parks including Paramount Canada's Wonderland; Carowinds in Charlotte, N.C.; Great America in Santa Clara, Calif.; and Kings Dominion in Richmond, Va.

Some giant media companies that were formed during the stock-market boom of the late 1990s have been under pressure from investors to break themselves up to unlock the value of their different businesses.