1. Air Water Inc.
2. Baymag Inc.
3. Dr. Paul Lohmann GmbH & Co. KGaA
4. Grecian Magnesite SA
5. ICL Group Ltd.
6. Industrias Penoles SAB de CV
7. Konoshima Chemical Co. Ltd.
8. Kumas Magnesite Industry Inc.
9. Lehmann and Voss and Co. KG
10. Liaoning Jinding Magnesite Group
11. Magnesitas Navarras SA
12. Martin Marietta Materials Inc.
13. Nedmag BV
14. Noah Chemicals Inc.
15. Rauschert GmbH
16. RHI Magnesita GmbH
17. Ube Industries Ltd.
18. Xinyang Mineral Group