1. Alpek S.A.B. de C.V.
2. ARKEMA S.A.
3. Atlas Roofing Corporation
4. BASF SE
5. BEWi ASA
6. Engineered Foam Products Ltd
7. Epsilyte LLC
8. Evonik Industries AG
9. Flint Hills Resources
LLC by Koch Industries Inc.
10. Foamex International Inc.
11. Innova S/A
12. Kaneka Corporation
13. LG Chem Ltd.
14. Loyal Group
15. NexKemia Petrochemicals Inc.
16. NOVA Chemicals Corporation
17. Ravago Petrokimya Uretim AS
18. Saudi Basic Industries Corporation
19. SIBUR International GmbH
20. Sulzer Ltd
21. Sundolitt Ltd.
22. SUNPOR Kunststoff GmbH
23. Synthos S.A.
24. TotalEnergies SE
25. UNIPOL
26. Versalis S.p.A.
27. Wuxi Xingda Foam Plastic New Material Limited