1. American Elements
2. ArcelorMittal S.A.
3. Aurubis AG
4. Avalon Advanced Materials Inc.
5. Belmont Metals Inc.
6. European Metals Holdings Limited
7. Indium Corporation
8. Malaysia Smelting Corporation Berhad
9. Merck KGaA
10. Metallo Chimique international NV
11. Minsur S.A.
12. Otto Chemie Pvt Ltd
13. Tamaki Sangyo Co. Ltd.
14. Thailand Smelting and Refining Co. Ltd
15. Yunnan Tin Group (Holding) Company Limited