1. Abra Mining
2. Alchemy Trading Company.
3. Anglo American Plc
4. Antofagasta Plc
5. Aurubis AG
6. BHP Billiton Ltd.
7. Boliden Group
8. Codelco
9. Freeport-McMoRan Inc.
10. Glencore plc
11. Honey Badger Silver Inc
12. Hudbay Minerals Inc.
13. Imperial Metals Corp.
14. Lundin Mining Corporation
15. Mitsubishi Corporation RtM Japan Ltd.
16. Norilsk Nickel
17. Rio Tinto Ltd.
18. Saudi Arabian Mining Company
19. SGS S.A.
20. Southern Copper Corp.
21. The Lhoist Group
22. United States Steel Corp.
23. Vale S.A.
24. WorleyParsons Limited
25. Zijin Mining Group Co. Ltd.
26. Zuellig Industrial Group