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Best Answer: Charles and David Koch own Koch industries and they are oil men. Their father, Fred started it as an oil refining company. The sons inherited it and together own over 80% of the company, therefore there is no board of trustees with any kind of executive power, it is all in the hands of the brothers.
The fortune is held by Sam's three living children and daughter-in-law, and Bud's two daughters. Second on the list were the Koch family with a net worth of $86bn. Koch Industries, led by siblings David and Charles, is a diversified conglomerate with more than $100bn in sales. The Mars family comes in at number three, with a fortune of $80bn.