Arch Coal is one of the largest coal producers in the United States, primarily focused on mining and selling coal for electricity generation and steel production. The company operates several mines across the country, particularly in the Appalachian and Illinois Basin regions, and has a significant presence in the energy market. Founded in 1997, Arch Coal has grown through various acquisitions and strategic partnerships. The company is committed to responsible mining practices and aims to minimize its environmental impact while meeting the energy needs of its customers.