- Alma Petroli S.p.a.
- BITUMINA HI-TECH PAVEMENT BINDERS LLC
- Cepsa
- Colas SA
- Eni SpA
- Exxon Mobil Corporation
- Gazprom Neft PJSC
- GRUPA LOTOS S.A.
- Nynas AB
- OMV Aktiengesellschaft
- ORLEN Asfalt Sp ZOO
- Puma
- Repsol
- ROSNEFT
- Royal Dutch Shell plc
- Total