1. BASF SE
2. Celanese Corporation
3. Covestro AG
4. Dow Inc.
5. Hella GmbH & Co. KGaA
6. Imerys S.A.
7. Kaneka Corporation
8. Koninklijke DSM N.V.
9. Lanxess AG
10. Mitsubishi Engineering-Plastics Corporation
11. PolyOne Corporation
12. RTP Company Inc.
13. Saudi Basic Industries Corporation
14. The Ensinger Group
15. Toray Industries Inc.