Sumner Redstone

Company: National Amusements Inc.

Company type: Media and entertainment

Age: 85

Years as chairman: 21

You should also know: In 1979, Redstone survived a Boston hotel fire by holding on to a third-floor window with one severely burned hand. The doctors didn't expect him to live, and when he did, they told him he would never be able to walk again. Redstone began to exercise daily on a treadmill and to play tennis regularly.