San Diego Water PurificationFiltration Eqpt Whol 10054 Old Grove Rd Based in Wichita, Kan., Koch Industries, Inc. owns a diverse group of companies involved in refining and chemicals; process and pollution control equipment and technologies; minerals; fertilizers; fibers and polymers; commodity and financial trading and services; and forest and consumer products. Koch companies have a presence in nearly 60 countries and employ about 80,000 people. With more than $110 billion in revenues, Koch Industries is the largest private company in America according to Forbes magazine. San Diego CA Water PurificationFiltration Eqpt Whol Koch Membrane Systems Inc www.kochind.com manufacturing crude oil refining petroleum Charles Koch privately held company Wichita Market Based Management MBM Principled Entrepreneurship risk management ranching fibers and polymers chemicals environment safety entrepreneurship manufacturing crude oil refining petroleum Charles Koch privately held company Wichita Market Based Management MBM Principled Entrepreneurship risk management ranching fibers and polymers chemicals environment safety entrepreneurship Business Reviews Koch Membrane Systems Inc Testimonials