Compagnie pétrolière Oil and Natural Gas Corporation (ONGC)

3R Petroleum | Anadarko | Andes Petroleum | BHP Billiton | BP | Bharat Petroleum | Bulgarian Petrol | Cenovus | Cepsa | Chevron | China National Offshore Oil Corporation (CNOOC) | China National Petroleum Corp (CNPC) | ConocoPhillips | CubaPetroleo (Cupet) | ENI | Ecopetrol | Enap | Equinor | Essar Oil | ExxonMobil | Groupe pétrolier Aker BP | Hellenic Petroleum | INA | Invictus Energy | Kuwait Gulf Oil Co. (KGOC) | Kuwait Petroleum Corp. (KPC) | Loukos | Lukoïl (Loukoïl) | Lundin Petroleum | Maurel et Prom | National Iranian Oil Compagny (NIOC) | National Oil Corporation (NOC) | Nigerian National Petroleum Corporation (NNPC) | Nis Petrol | OMV | Oil and Natural Gas Corporation (ONGC) | PDVSA | Pemex | Perenco | Pertamina | PetroChina | Petroleo Brasileiro (PetroBras) | Petrolia | Petronas | Petrovietnam | Qatar Petroleum (QP) | Repsol | Rosneft | SNPC (Société Nationale des Pétroles du Congo) | Saudi Aramco | Schuepbach | Shell | Sinopec | Soma Oil and Gas | Sonangol | Sonatrach | Statoil | TotalEnergies | Tullow Oil | YPF | Zarubezhneft |