1. Americhem
2. Arkema S.A.
3. Asahi Kasei Corporation
4. Axel Polymers Limited
5. Bada AG
6. BASF SE
7. Celanese Corporation
8. CHEMIEURO
9. CHIMEI Corporation
10. Covestro AG
11. Daicel Corporation
12. Dirco Polymers Pvt Ltd
13. Foster Corporation
14. INEOS Styrolution Group GmbH
15. JSR Corporation
16. LG Chem Ltd.
17. LyondellBasell Industries Holdings B.V.
18. Mitsubishi Engineering-Plastics Corporation
19. Padmanabh Alloys & Polymers Ltd
20. PLUSS Advanced Technologies
21. Polykemi AB
22. Radici Partecipazioni SpA
23. Romira GmbH
24. SABIC
25. Trinseo PLC