5 Largest Privately Held Companies in America

2. Koch Industries

Annual Revenue: $115 Billion

Koch Industries is a multinational conglomerate based in Wichita, Kansas. Founded in 1940 by Fred C. Koch, the company has grown to become one of the largest privately owned companies in America, with an estimated annual revenue of $115 billion. Koch Industries operates in a variety of industries, including refining, chemicals, polymers, minerals, fertilizers, consumer products, building products, financial services, and investments.