Sumner Redstone

Sumner Redstone remains controlling shareholder of both CBS and Viacom, despite continuous boardroom and courtroom drama.Redstone's father founded the cinema chain now known as National Amusements in 1936; Redstone took over in 1954.He acquired control of Viacom in 1987 and spun off CBS in 2006. CBS and National Amusements, run by his daughter Shari, are currently fighting over control of the network. Redstone has given over $216 million to philanthropic causes, including arts and education institutions in his native Boston and hometown Los Angeles.