1. ARKEMA SA
2. B&F PLASTICS
3. BASF SE
4. BOREALIS AG
5. CHEVRON PHILLIPS CHEMICAL COMPANY LLC
6. CORK PLASTICS
7. DOWDUPONT INC.
8. INEOS GROUP HOLDING S.A.
9. KONINKLIJKE DSM N.V
10. LANXESS AKTIENGESELLSCHAFT
11. LG CHEM
12. LYONDELLBASELL INDUSTRIES HOLDINGS B.V.
13. PETROCHINA LTD.
14. SABIC
15. SOLVAY SA