Cleveland-Cliffs Inc, formerly Cliffs Natural Resources Inc., is a mining and natural resources company. The Company is a supplier of iron ore pellets to the North American steel industry from its mines and pellet plants located in Michigan and Minnesota. The Company operates through its U.S. Iron Ore. The Company is a producer of iron ore pellets, primarily selling production from U.S. Iron Ore to integrated steel companies in the United States, Canada and Mexico. In the United States, the Company owned four operational iron ore mines and one indefinitely idled mine.