1. ATHA Group
2. Bathco Ltd
3. Bharat Petroleum Corporation Limited
4. BP PLC
5. Cenovus Energy Inc.
6. Chennai Petroleum Corporation Limited
7. Chevron Corporation
8. China Petroleum & Chemical Corporation
9. CITGO Petroleum Corporation
10. Cocan (Hubei) Graphite Mill Inc.
11. Exotron Thermal,
12. Graphite India Limited
13. Henan Refuel Petroleum Equipment Co.Ltd.
14. India Carbon Ltd
15. Indian Oil Corporation Limited
16. LLC "EL 6"
17. Marathon Petroleum Corporation
18. MOL GROUP
19. N G MINCHEM Private Ltd
20. NIPPON COKE & ENGINEERING. CO. LTD.
21. Oxbow Corporation
22. PETROLEUM COKE INDUSTRIES CO.
23. Phoolchand Bhagatsingh
24. Pioneer Carbon
25. Prithvi Chemical Manufacturing Company Pvt. Ltd.
26. Rain Carbon Inc.
27. Rain Industries Limited
28. Reliance Industries Limited
29. SC Fuels
30. Shamokin Carbons
31. Shri Satchidanand Petroleums Pvt. Ltd.
32. TABOIL CORPORATION LLC
33. Trammo Inc.
34. Valero Marketing and Supply Company
35. Viva Carbon Pvt. Ltd