15 Largest Family-Owned Businesses In The US

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5. Koch Industries Inc.

Koch Industries ranks 5th in our list of largest family-owned businesses in the US. It is the textbook definition of a diversified conglomerate, with businesses in refining and chemicals, process and pollution control equipment, technologies, electronic components, fibers and polymers, commodity and financial trading, forest and consumer products, crude oil, and cattle. Brothers Charles and David Koch control 84% the company, which took home $100 billion in sales last year.

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