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4. Mellody Hobson
Mellody Hobson
Job title: President, Ariel Investments

Hobson is president of Ariel Investments, a $3 billion mutual fund company in Chicago.

Her firm's value-driven approach has led its flagship Ariel Fund in the past decade to outperform the S&P 500 by more than 6% a year.

Known for doling out financial advice to millions on ABC's Good Morning America and for her keen fashion sense, Hobson is also a board member of DreamWorks Animation SKG, Estee Lauder Companies and Starbucks.

NEXT: Olivier Sarkozy

Last updated October 22 2009: 7:54 AM ET
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