The list includes Alon (United States), Conoco Philips (United Kingdom), Eni (Italy), Gazprom (Russia), Glencore (Switzerland), Hellenic Petroleum (Greece), MOL (Hungary), Occidental Oil and Gas Holding Corporation (United States), OMV (Austria), PKN Orlen (Poland) and TNK-BP (United States).
Lista include companiile Alon (Statele Unite), Conoco Philips (Marea Britanie), Eni (Italia), Gazprom (Rusia), Glencore (Elveţia), Hellenic Petroleum (Grecia), MOL (Ungaria), Occidental Oil and Gas Holding Corporation (Statele Unite), OMV (Austria), PKN Orlen (Polonia) şi TNK-BP (Statele Unite).