1. Aditya Birla Group
2. Atlas Organics Private Limited
3. Bridgestone Corporation
4. Cabot Corporation
5. Cancarb Limited
6. China Synthetic Rubber Corporation
7. Continental Carbon Company
8. Denka Company Limited
9. Himadri Speciality Chemicals Ltd.
10. Imerys S.A.
11. Jiangxi HEIMAO Carbon black Co. Ltd
12. Mil-Spec Industries Corporation
13. Mitsubishi Chemical Corporation
14. OCI COMPANY Ltd.
15. Omsk Carbon group
16. Orion Engineered Carbons GmbH
17. PCBL Limited
18. Ralson Carbon
19. Vizag Chemicals Private Limited