1. AnQore B.V.
2. Asahi Kasei Corporation
3. Ascend Performance Materials Operations LLC
4. Chemelot
5. China National Petroleum Corporation
6. China Petrochemical Development Corporation
7. Cornerstone Chemical Company
8. Formosa Chemicals & Fibre Corp.
9. INEOS AG
10. Jiangsu SailboatPetrochemical Co. Ltd.
11. Lenntech B.V.
12. LG Chem
Ltd.
13. LUKOIL Group
14. Mitsubishi Chemical Corporation
15. Petkim Petrokimya Holding AS
16. Plastic Extrusion Technologies
17. Polymir
18. Reliance Industries Limited
19. Repsol
S.A.
20. Shanghai SECCO Petrochemical Co. Ltd.
21. Sinopec Catalyst Co. Ltd.
22. Solvay S.A.
23. Sumitomo Chemical Co. Ltd.
24. Taekwang Industrial Co. Ltd.
25. Tongsuh Petrochemical Corporation Ltd.
26. Toray Industries Inc.
27. United Plastic Components Inc.