Qatar Petroleum
Occidental Petroleum of Qatar Ltd. (OPQL)
Qatargas Operating Company Limited (Qatargas)
Dolphin Energy
Total E&P Qatar
Oryx GTL Limited
North Oil Company (NOC)
Qatar Fertiliser Company (QAFCO)
Qatar Fuel Additives Company Limited (QAFAC)
Raslaffan Liquified Natural Gas Co. (Rasgas)
Qatar Petrochemical Company Q.S.C (QAPCO)
Qatar Chemical Company Ltd (Q-Chem)