1. BASF SE
2. Braskem SA
3. Cepsa Qu?mica
SA
4. Chang Chun Group
5. China Petrochemical Development Corporation
6. CITGO Petroleum Corporation
7. DOMO Chemicals GmbH
8. Exxon Mobil Corporation
9. Formosa Plastics Corporation
10. INEOS AG
11. Kanto Chemical Co. Inc.
12. Kishida Chemical Co.Ltd.
13. Koch Industries Inc.
14. Kumho P&B Chemicals.Inc.
15. Mitsui Chemicals Inc.
16. Prasol Chemicals Limited
17. Royal Dutch Shell PLC
18. Saudi Basic Industries Corporation
19. Spectrum Chemical Mfg. Corp.
20. Sumitomo Chemical Co. Ltd.
21. Taiwan Cement Corp.
22. The Dow Chemical Company
23. Toronto Research Chemicals
24. Versalis S.p.A. by Eni S.p.A.
25. Westlake Chemical Corporation