Here's a primer on Sumner Redstone's battle against Viacom, specifically CEO Philippe Dauman, whome he kicked off the board of directors last week.

This time last year, Sumner Redstone and his daughter Shari were on the rocks. The ailing media mogul had offered Shari $1 billion for her 20% stake in his empire, partly to guarantee that she'd ...

Fred Salerno, the company's lead independent director — until being ousted Thursday, at least — calls the maneuver "brazen and demonstrably invalid" and vows to sue.

Sumner Redstone acquired the company in 1987 and groomed its properties with investments and acquisitions, culminating in 1994, when Viacom won a pitched battle against Barry Diller to buy ...

But Sumner Redstone was not, even though he remains the chairman emeritus of Viacom and the head of National Amusements, the holding company that controls both Viacom and CBS.

Sumner Redstone plans to step down from Viacom's board of directors in two months, retaining a non-voting role as chairman emeritus. The action takes effect after Viacom's annual meeting February ...

Viacom’s controlling shareholder, Sumner Redstone, says that he has lost confidence in his hand-picked board members who oversee the media company.

Ailing Sumner Redstone, the 92-year-old mogul who helped shape modern Hollywood, is relinquishing his oversight of the two entertainment companies he controls: CBS Corp. and Viacom Inc.

Media titan Sumner Redstone, who built the company Viacom into a global empire, died Tuesday at his home in Los Angeles. He was 97. Through shrewd investing and strategic deal-making, ...

Sumner Redstone, who joined his family’s drive-in movie chain in the 1950s and used it to build a vast media empire that included CBS and Viacom, has died. He was 97.

The battle for Viacom has become complicated since Sumner Redstone's lawyers informed CEO Philippe Dauman he was out of the inner circle. Sumner Redstone's Battle For Viacom: What You Need To Know ...

On the night of May 27, Sumner Redstone celebrated his 93rd birthday at his Beverly Park mansion, an intimate party for family members thrown by his daughter, Shari Redstone. The two had much to ...