- BASF SE
- Braskem
- Chevron Phillips Chemical Company
- China Petrochemical Corporation
- CPC Corporation Limited
- Eastman Chemical Company
- Exxon Mobil Corporation
- Flint Hills Resources
- INEOS
- JXTG Nippon Oil & Energy Corporation
- LG Chem
- LyondellBasell Industries Holdings BV
- Marathon Petroleum Company
- Maruzen Petrochemical
- Mitsubishi Chemical Corporation
- Reliance Industries Limited
- Royal Dutch Shell PLC
- SABIC
- SK global chemical Co. Ltd