Koppers is the world s largest distiller of coal tar, a byproduct of the transformation of coal to coke. The company is a global integrated producer of chemicals, carbon compounds and treated wood products for the aluminum, steel, chemical, plastics, railroad and utility industries. Including its joint ventures, Koppers operates more than 37 facilities in the United States, United Kingdom, Denmark, Australia, China, the Pacific Rim and South Africa. The company is a wholly owned subsidiary of KI Holdings Inc. The stock of KI Holdings Inc. is shared by a large number of employee investors and by majority equity owner Saratoga Partners of New York city. Koppers corporate headquarters and the company s research center are located in Pittsburgh.