1. Barentz Ravago Chemical Specialist SA
2. Braskem S.A.
3. Chevron Phillips Chemical Company LLC
4. China Petrochemical Corporation
5. Eneos Corporation
6. Exxon Mobil Corporation
7. LyondellBasell Industries Holdings B.V.
8. Merck KGaA
9. Nova Chemicals Corporate
10. Shell PLC
11. Sojitz Corporation
12. Sunny Industrial System GmbH
13. Texmark Chemicals Inc.
14. The Chemical Company
15. The Dow Chemical Company
16. Tokyo Chemical Industry Co. Ltd.
17. Zeon Europe GmbH
18. Zibo Luhua Hongjin New Material Group Co. Ltd.