CBS Goes on Attack Against Redstones, Sues Controlling Shareholder

Suit is an effort to block National Amusements from forcing the recombination of CBS, Viacom

CBS Corp. has declared war on its controlling shareholder, suing Shari Redstone and her family’s National Amusements Inc. holding company for trying to force CBS to merge with Viacom Inc.

The lawsuit is a move by the media company and its independent directors to reject the suggested merger, prevent Ms. Redstone from retaliating against the board for refusing the deal, and reduce National Amusements’ voting power.

Filed...