SOCAR Türkiye Refinery and Petrochemicals Business Unit
Sarir Oil Operations B.V
ICGB AD
Güney Yıldızı Petrol
Kura Basin Operating Company (KBOC)
Turkish Petroleum
Japan Oil, Gas and Metals National Corporation
OMV Petrom SA
Syntez NDT
Encon International
Star Refinery & Petrochemicals Business Unit
WABAG Water Services SRL