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16. FMR
2007 revenue: $14.9 billion
Fiscal year end: Dec. 31
2007 Employees: 46,400
Industry: Securities
CEO: Edward C. Johnson III
Location: Boston, Mass.

Otherwise known as Fidelity Investments, FMR serves 24 million institutional and individual investors. Fidelity operates 300 funds, including the biggest mutual fund in the United States, and it has $1.5 trillion in assets under management.

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Last updated May 28 2008: 12:40 PM ET