Koch Industries, USA

Koch Industries (Koch Industries) is one of the world's largest unlisted companies, founded by brothers Charles Koch and David Koch, mainly engaged in crude oil extraction, petroleum refining, pipeline transportation and other businesses, and is the world's largest road asphalt production and supplier. Koch Industries Group owns Georgia-Pacific, Molex, etc., into the paper, electronics and other industries.In 2014, the Koch brothers ranked No. 6 on Forbes' list of the world's billionaires with $40 billion in assets.