• State Atomic Energy Corporation Rosatom with its subsidiaries and affiliated companies
• Project company "Akkuyu NPP" (name in Turkish - Akkuyu NGS Elektrik Uretim Anonim Sirketi, Turkey)
• Rusatom Overseas JSC
• Concern Rosenergoatom - United Company NIAEP OJSC - Atomstroyexport CJSC
• Atomenergoproekt JSC (Moscow)
• ATOMPROEKT JSC (formerly JSC SPbAEP, St. Petersburg)
• INTER RAO UES JSC and its subsidiary OGK-1 JSC
• Technopark Sarov JSC
• Yamal LNG JSC
• Kolubara d.o.o. (Serbia)
• Coal and Chemical Plant "RICoal" LLC
• WorleyParsons Nuclear services (Global Power Industry Engineering Hub of WorleyParsons Corporation, Sofia, Bulgaria, and branch office WPNS in Plzen, Czech Republic)
• WorleyParsons Group Inc. (WorleyParsons Center of Excellence in coal-, gas-, and oil-chemistry in Huston, USA and WorleyParsons Center of Excellence in conventional power engineering in Reading, USA)
• WorleyParsons Group companies in the UK, Australia, Spain and other countries
• Fennovoima - Finnish power energy company - future operator of the NPP in Pyh?joki municipality. Their project is the Hanhikivi 1 NPP - the biggest private investment in Finland.