President, Fidelity Employer Services
Fidelity
2006 rank: 18Fidelity
Age: 45
Questions about her health and Fidelity's well-being have thrown into doubt the idea that Johnson will lead the $12.9 billion mutual fund giant someday. A number of executives have quit this year, including key players within her unit, which dominates the 401(k) market. But Johnson is still a major shareholder - and CEO Ned Johnson's daughter.
