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).
Listede Alon (ABD), Conoco Philips (İngiltere), Eni (İtalya), Gazprom (Rusya), Glencore (İsviçre), Hellenic Petroleum (Yunanistan), MOL (Macaristan), Occidental Oil and Gas Holding Corporation (ABD), OMV (Austria), PKN Orlen (Polonya) ve TNK-BP (ABD) yer alıyor.