- Cepsa Quimica Becancour Inc. (Compania Espanola de Petroleos SAU)
- Farabi Petrochemicals Co.
- Formosan Union Chemical Corporation
- HO TUNG CHEMICAL CORP.
- Huntsman Corporation
- Indian Oil Corporation Ltd
- ISU CHEMICAL
- Jingtung Petrochemical Corp. Ltd
- JXTG Nippon Oil & Energy Corporation
- NIRMA Ltd
- Quimica Venoco
- Reliance Industries Limited
- SBK HOLDING
- Sasol
- Tamilnadu Petroproducts Ltd