1. AKJ Minchem Pvt. Ltd.
2. Anmol Chemicals Group
3. Ascom Carbonate and Chemicals Manufacturing
4. Brenntag SE
5. Calcinor Servicios S.A.
6. Carmeuse Holding S.A.
7. Columbia River Carbonates
8. Emirates Calcium Carbonate Factory
9. Esen Mikronize Maden
10. EZ Chemical Co. Ltd.
11. Gulshan Polyols Limited
12. Imerys S.A.
13. J.M. Huber Corporation
14. Jay Minerals
15. Jyoti Mineral Industries
16. Lhoist Group
17. Maruo Calcium Co. Ltd.
18. Merck KGaA
19. Minerals Technologies Inc.
20. Mississippi Lime Company
21. NanoMaterials Technology Pte Ltd.
22. Nitto Funka Kogyo K.K.
23. Nordkalk Corporation by SigmaRoc PLC
24. Omya AG
25. SCHAEFER KALK GmbH & Co. KG
26. SCR-Sibelco NV
27. Shiraishi Kogyo Kaisha
Ltd.
28. Solvay SA
29. Spectrum Chemical Mfg. Corp.
30. Tan Ky Mineral Processing Joint Stock Company
31. Wolkem India Ltd.
32. Yuncheng Chemical Industrial Co. Ltd.