1. Advanced Drainage Systems Inc.
2. Alpek S.A.B. de C.V.
3. Ark Plastics Ltd.
4. Avangard Innovative
5. B & B Plastics Recycling Inc.
6. B. Schoenberg & Co. Inc.
7. BASF SE
8. Berry Global Inc.
9. Borealis AG
10. Casella Waste Systems
11. Consolidated Container Company
12. Covanta Holding Corporation
13. Covestro AG
14. Imerys S.A.
15. Indorama Ventures Public Company Limited
16. Jayplas
17. Kuusakoski Oy
18. KW Plastics
19. Loop Industries Inc.
20. MBA Polymers Inc.
21. Montello S.p.A.
22. Plastipak Holdings Inc.
23. Reconomy (UK) Ltd
24. Recycled Plastics UK
25. Republic Services Inc.
26. Seraphim Plastics LLC
27. Shakti Plastic Industries
28. Suez SA
29. Teijin Limited
30. Ultra Poly Corporation
31. Veolia Environnement S.A.