ExxonMobil, Shell, BP Amoco (now renamed BP Company), France Total.
Major national oil companies include:
Aramco (Saudi Arabia)
National Oil Company of Iran (NIOC) (Iran)
Egyptian Oil Company (EGPC) (Egypt)
PetroColombia (Colombia)
Libyan National Oil Company (Libya)
Indian oil and gas company India (India)
Petromex (Mexico)
PetroVenezuela (Venezuela)
China Petroleum (China)
Nigeria National Oil Company (Nigeria)
Iraqi National Oil Company (Iraq)
Kuwait Petroleum Corporation (Kuwait)
Pertamina (Indonesia)
Petrobras (Brazil)
Oman Petroleum Development Company (Oman)
Abu Dhabi National Oil Company (Abu Dhabi)
UAE National Oil Company (Dubai)
Petronas Malaysia
Rosneft (Russia)
China Petrochemical (China)
Russian natural gas (Russia)
Norwegian national oil company Hydero (Norway)
Sonat Lach (Algeria)
Kenya National Oil Company (Kenya)
GEPetrol (Equatorial Guinea)
Sonangol (Angola)
Nestor Oil Company (Finland)