2. John Bogle
Age: 80
Job title: Founder, Vanguard Group
Thirty years after founding the mutual fund giant, Bogle still arrives at the office each day at 7:45 a.m. to write speeches, make television appearances, and plot his ideas for financial reform. With three colleagues, he leads a small research center within Vanguard.
Though he hasn't held an executive position at Vanguard for 10 years, Bogle recently told Fortune he still goes to lunch with groups of Vanguard employees and shareholders.
Thirteen years after a heart transplant, Bogle says of Vanguard, "I still love it. It's my passion."
NEXT: T. Boone Pickens
