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Much of the Kochs' (David and Charles) comes from industrial operations: 1  Koch Pipeline Company LP:; owns and operates 4,000 miles of pipeline used to transport oil, natural gas liquids and chemicals. 2  Flint Hill Resources LP, that operates oil refineries in six states.
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.