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7. David Koch

October 23, 2008

Age: 68
Company: Koch Industries
Net worth: $ 17 billion
Donations during 2007–2008: $ 228 million
Donations during 2002–2006: $ 63 million
Family foundation (assets): David H Koch Charitable Foundation ($ 3.9 million)
Favourite causes: Health care, arts

Image: Julia and David Koch | Photograph: Amy Sussman/Getty Images

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