ONEOK Pipeline, 1751 SW Haverhill Rd, El Dorado, KS 67042, US

Koch Carbon is engaged in the trading, marketing and terminalling of petroleum coke, coal, salt, slag, cement, clinker and ocean freight. The company is a subsidiary of Koch Industries. Koch Industries and its sister company, Koch Holdings, own a diverse group of privately owned companies engaged in trading, operations and investment throughout the world. Founded in the late 1920s, Koch Industries has developed and accrued companies that have a presence in more than 50 countries and employ more than 70,000 people. Its companies are engaged in core industries such as petroleum, chemicals, energy for heating and cooling, fibers, intermediates and polymers, minerals, fertilizers, pulp and paper, chemical technology equipment, ranching and securities and financial services. Koch Carbon is headquartered in Wichita, Kan.