1. Albemarle Corporation
2. BASF SE
3. DuPont de Nemours Inc.
4. Evonik Industries AG
5. Glassven C.A.
6. Imerys S.A.
7. Ishihara Corporation
8. KRONOS Worldwide Inc.
9. LANXESS Deutschland GmbH
10. Merck KGaA
11. Minerals Technologies Inc.
12. Mitsui Chemicals Inc.
13. Omya AG
14. The Chemours Company
15. Travancore Titanium Products Ltd.