4. Kansas: David Koch
David Koch is a political activist and an investor, along with the executive vice president of the Koch Industries. He has an estimated wealth of around $42.7 billion. Koch is one of the richest residents in the New York City, with sales shares worth $115 billion of Koch Industries, the second biggest private firm in the United States, along with his elder brother Charles Koch. The Koch Industries has shares in refineries, oil pipelines, building materials, Dixie cups, and paper towels. Moreover, the company is developing even more with its several acquisitions due to its impressive cash flow. David’s brother, Charles Koch is the chairman of Koch industries, while he runs the chemical technology section of the business.