A
* Alon USA, Flag of the United States.svg Amerika Serikat
* Amerada Hess Corporation, Flag of the United States.svg Amerika Serikat
* Anadarko Petroleum Corporation, Flag of the United States.svg Amerika Serikat
* Arbusto Energy, Flag of the United States.svg Amerika Serikat
B
* BG Group, United Kingdom
* Bharat Petroleum Corporation Limited, India
* BHP Billiton, Australia
* BP, United Kingdom
C
* Cairn Energy, India
* Canadian Natural Resources, Kanada
* Charottar Gas Sahkari Mandli., India
* Chevron Corporation, Amerika Serikat
* Chem-Energy Corporation, Amerika Serikat. lihat [2]
* Citgo, Venezuela
* CNOOC Ltd., Flag of the People's Republic of China.svg Republik Rakyat Cina
* ConocoPhillips, Flag of the United States.svg Amerika Serikat
* Cupet, Kuba
D
* Devon Energy, Flag of the United States.svg Amerika Serikat
E
* Ecopetrol, Kolombia
* Enbridge, Kanada
* EnCana, Kanada
* ENSCO International, Flag of the United States.svg Amerika Serikat. lihat [3]
* Elinoil Hellenic Petroleum Comopany S.A., Yunani
* Eni, Italy
* Essar Oil, India
* ExxonMobil, Flag of the United States.svg Amerika Serikat
G
* Gujarat Oleo Chem Ltd., India
* Geo Global Resources., India
* Grupa LOTOS, Polandia
* Gujarat Gas Co. Ltd., India
* Gujrat State Petroleum Corporation, India
* Gulf Oil, Flag of the United States.svg Amerika Serikat
H
* Halliburton, Flag of the United States.svg Amerika Serikat
* HOECL, India
* Husky Energy Inc., Kanada
I
* Imperial Oil, Flag of Canada.svg Kanada
* Indian Oil Corporation, Flag of India.svg India
* INPEX Corporation, Flag of Japan.svg Jepang
* Irving Oil, Flag of Canada.svg Kanada
J
* Jubiliant Empro, India
* JHON ENERGY, India
K
* Kerr-McGee, Flag of the United States.svg Amerika Serikat
* Koch Industries, Flag of the United States.svg Amerika Serikat
L
* The Louisiana Land & Exploration Company, Flag of the United States.svg Amerika Serikat
* LUKoil, Rusia
M
* Marathon Oil Corporation, Flag of the United States.svg Amerika Serikat
* Maxol Group, Republic Irlandia
* Medco Energi, Indonesia
N
* Neste Oil, Finlandia
* NNPC, Nigeria
* Norsk Hydro, Norwegia
* North Atlantic Petroleum, Kanada
* Northern Territory Oil Limited, Australia
O
* Oil India Limited, India
* OMV, Austria
* ONGC, India
* Orlen, Polandia
P
* Petronet LNG Limited, India
* Piyush Petroleum Co. Ltd, India
* Pankaj Petroleum Co. Ltd, India
* Petróleos de Venezuela, Venezuela
* Petroleos Mexicanos, Meksiko
* Petro-Canada, Kanada
* Petro Peru, Peru
* Petrobras, Brasil
* PetroChina, Cina
* Petroconpak, Pakistan
* PetroKazakhstan, Kanada
* Petronas, Malaysia
* Petrotrin, Trinidad dan Tobago
* Pertamina, Indonesia
* Prize Petroleum CO.LTD., India
* Pogo Producing, Flag of the United States.svg Amerika Serikat
* Pakistan State Oil, Pakistan
Q
* Qatar Petroleum, Qatar
R
* Reliance Industries Limited, India
* Repsol YPF, Spanyol
* Royal Dutch Shell, Belanda, United Kingdom
S
* Santos Limited, Australia
* Saudi Aramco, Arab Saudi (the largest in the world)
* Selan Exploration Tech.Ltd., India
* Shell Canada, Kanada (anak perusahaan dari Royal Dutch Shell)
* Shell Oil Company, Flag of the United States.svg Amerika Serikat (anak perusahaan dari Royal Dutch Shell)
* Ship N Oil Corporation, Flag of the United States.svg Amerika Serikat. lihat [4]
* Sinclair Oil, Flag of the United States.svg Amerika Serikat
* Sinopec, Cina
* Sonangol, Angola
* Sonatrach, Aljazair
* SPC, Singapura
* Statoil, Norwegia
* Stuart Petroleum Limited, Australia
* Sunoco, Flag of the United States.svg Amerika Serikat
* Suncor Energy, Kanada
* Surgutneftegaz, Rusia
* Syncrude, Kanada
T
* Talisman Energy, Kanada
* Teikoku Oil, Jepang
* Todd Energy, Selandia Baru
* Total, Perancis
* Tüpraş, Turki
* Tri Star, Australia
U
* United Petroleum, Australia
V
* Vaalco Energy Inc., Flag of the United States.svg Amerika Serikat
* Van Doren Oil, Flag of the United States.svg Amerika Serikat
* VICO Indonesia, Flag of Indonesia.svg Indonesia
W
* Woodside Petroleum, Australia
Y
* YPFB, Bolivia
* YUKOS, Rusia
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