- Afton Chemical
- Baker Hughes (General Electric)
- BASF SE
- Chevron Corporation
- Clariant
- Croda International PLC
- Dorfketal Chemicals (I) Pvt Ltd
- Eni SpA
- Evonik Industries AG
- Exxon Mobil Corporation
- Innospec Inc.
- LANXESS
- QAFAC
- Royal Dutch Shell PLC
- The Lubrizol Corporation
- Total SA
- VeryOne SaS (EURENCO)
- Infineum International Limited