- Arkema Group
- Asahi Kasei Corporation
- Ashland
- BASF SE
- Chevron Phillips Chemical Company
- Chi Mei Corp.
- Covestro AG
- DuPont
- DSM
- Evonik Industries AG
- Formosa Plastics Group
- Huntsman Corp.
- Idemitsu Kosan
- Ineos Chlorvinyls Ltd
- Lanxess
- LG Chem
- Lotte Chemical Corporation
- Mitsubishi Engineering Plastics Corporation (Mitsubishi Chemical Corporation)
- SABIC
- Samyang
- Shin-Etsu Chemical Co. Limited
- Solvay
- Teijin Limited
- Trinseo
- Westlake Chemical Corporation