1. Bangkok Synthetics Co. Ltd.
2. BASF SE
3. Chevron Phillips Chemical Company LLC
4. China National Petroleum Corporation
5. Daelim Co. Ltd.
6. Evonik Industries AG
7. Exxon Mobil Corporation
8. Haldia Petrochemicals Limited
9. Heze Sirloong Chemical Co.Ltd
10. Idemitsu Kosan Co.Ltd.
11. Jam Petrochemical Company
12. Linde PLC
13. Lorestan Petrochemical Co.
14. Lyondellbasell Industries N.V.
15. Merck KGaA
16. Mitsui Chemicals Inc.
17. MOGAS Industries Inc.
18. PETRONAS Chemicals Group Berhad
19. Praxair Technology Inc.
20. PTT Global Chemical Public Company Limited.
21. SABIC
22. Shell International B.V.
23. Sumitomo Chemical Co. Ltd.
24. Tokyo Chemical Industry Co. Ltd.
25. TPC Group