- Dow Chemical
- LyondellBassell
- DuPont
- Chevron Phillips
- PPG Industries
- BASF
- Bayer
- Evonik Industries
- INEOS
- Akzo Nobel/Imperial Chemical Industries
- Air Liquide
- Formosa Plastics
- Saudi Basic Industries Corporation
- Shin-Etsu Chemical Co.
- Asahi Kasei
- Toray Industries
- Mitsui Chemicals
- Sumitomo Chemical
- Mitsubishi ChemicalDSM