1. Aditya Birla Chemicals (India) Limited
2. Ashapura Group
3. Aum Farbenchem
4. BASF SE
5. ECKART GmbH
6. Ferro Corporation
7. Heubach GmbH
8. Kemira Oyj
9. Nordkalk Corporation
10. Omya AG
11. Omya International AG
12. Subhasri Pigments Pvt. Ltd.
13. Sudarshan Chemical Industries Limited
14. Sun Chemical Group
15. Thiele Kaolin Company
16. Tronox Holdings PLC
17. Venator Materials PLC