American Steamship Company, also known as ASC, specializes in vessel transportation services. Founded in 1907, it transports a variety of dry bulk commodities, including iron ore pellets, coal products and limestone aggregates. As a part of GATX Corporation, the company offers waterborne transportation solutions. American Steamship Company is one of the largest domestic providers of waterborne dry bulk transportation services in the Great Lakes region in New York. In addition, it maintains a fleet of vessels and mariners. The company s clients include Koch Industries, ArcelorMittal, National Gypsum Company and General Mills.