1. ARKEMA SA
2. AKZO NOBEL N.V.
3. ARYASASOL
4. ASAHI KASEI
5. BRASKEM S.A.
6. CHEVRON PHILLIPS INC.
7. CHINA PETROLEUM & CHEMICAL CORPORATION (SINOPEC)
8. DOW CHEMICAL COMPANY
9. E. I. DU PONT DE NEMOURS AND COMPANY
10. EXXONMOBIL
11. EVONIK INDUSTRIES
12. FORMOSA PLASTICS CORPORATION
13. LYONDELL BASELL INDUSTRIES N.V.
14. MITSUBISHI CHEMICAL HOLDINGS
15. PTT GROUP
16. POLYONE CORPORATION
17. ROGERS CORPORATION
18. SAUDI BASIC INDUSTRIES CORPORATION (SABIC)
19. TORAY INDUSTRIES
20. PETROLIAM NASIONAL BERHAD (PETRONAS)