1. Aditya Birla Group
2. Black Bear Carbon B.V.
3. Cabot Corporation
4. Continental Carbon Company
5. Himadri Specialty Chemical Ltd.
6. Imerys S.A.
7. Iran Carbon Co.
8. Mitsubishi Chemical Group Corporation
9. OCI COMPANY Ltd.
10. OMSK Carbon Group
11. Orion Engineered Carbons
12. PCBL Limited
13. Powder Technology Inc.
14. Ralson Goodluck Carbon Pvt. Ltd.
15. SGL Carbon
16. Tokai Carbon Co. Ltd.