** Vale SA, Rio Tinto PLC, BHP Group PLC, Anglo American PLC, Glencore PLC, Fortescue Metals Group Ltd, Kumba Iron Ore Ltd; **** ArcelorMittal SA, POSCO, Nippon Steel Corp, thyssenkrupp AG, Nucor Corp, Tata Steel Ltd, Nippon Steel Corp, United States Steel Corp, Steel Dynamics Inc