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Published at 12:53pm
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David Hamilton Koch, 66
Net worth: $17 billion
Richest New Yorker!
After inheriting Daddy's oil-refining company, Koch Industries, David and his three brothers supercharged it into the nation's largest privately owned company. David and brother Charles bought out the other two siblings in the '80s and have expanded the company to lumber, paper, chemicals and other earth-loving ventures.
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