AGE: 49 OCCUPATION: CEO, Grosvenor Capital Management

This investment whiz, mega-Democrat, and art-loving buddy of the mayor’s popped into view last summer when Emanuel named him chief corporate ambassador for Chicago. Now Sacks is tapping his network of CEOs to rustle up millions in private-sector cash for the NATO and G8 summits in May.

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Photograph: Heather Charles/Chicago Tribune