- Al Sanea
- Cepsa
- DHC Solvent Chemie GmbH
- Exxon Mobil Corporation
- Ganga Rasayanie P. Ltd
- HCS Group
- Kapco Petroleum Industries FZC
- KH Chemicals
- KIF
- Neste
- PMPI
- PT Pertamina
- Royal Dutch Shell PLC
- STOCKMEIER Gruppe
- Total SA