Warrior Met Coal, Inc. (HCC)
Warrior Met Coal, Inc. produces and exports non-thermal metallurgical coal for the steel industry. It operates two underground mines located in Alabama.
Ramaco Resources, Inc. (METC)
Ramaco Resources, Inc. engages in the development, operation, and sale of metallurgical coal.
Hallador Energy Company (HNRG)
Hallador Energy Company, through its subsidiaries, engages in the production of steam coal in the State of Indiana for the electric power generation industry.