1. 20 Microns Limited
2. Aditya Birla Management Corp. Pvt. Ltd.
3. Amco Polymers.
4. Azelis group
5. Bausano & Figli S.p.A.
6. Cabot Corporation
7. Covia Holdings LLC.
8. Elementis plc
9. Evonik Industries AG
10. Formosa Plastics Corporation
11. GCR Group
12. HOFFMANN MINERAL Mineral GmbH
13. Imerys S.A.
14. J M Huber Corp.
15. Jay Minerals
16. K?rntner Montanindustrie GmbH
17. LKAB Minerals
18. Merit Polymers
19. Minerals Technologies Inc.
20. Mississippi Lime Company
21. Omya AG
22. Owens Corning
23. Quarzwerke GmbH
24. Solvay SA
25. Toray Industries Inc.