| TSTermotim Sombor Sombor, SerbiaEnergy, Utilities & Waste Treatment | Installation services (except software) Servis Gorionika Servis Ložnih Uređaja Industrijska Termo–energetika | |
| TDTehnolink d.o.o. Generators Novi Sad Novi Sad, SerbiaEnergy, Utilities & Waste Treatment | Installation services (except software) Generatori Energetska Rešenja Prodaja | |
| TOTriton oil doo Beograd, SerbiaEnergy, Utilities & Waste Treatment | Construction structures and materials; auxiliary products to construction (except electric apparatus) Ovlašćeni Distributer Industrijska Ulja Shell | |
| RRUMEKON Ruma, SerbiaEnergy, Utilities & Waste Treatment | Construction structures and materials; auxiliary products to construction (except electric apparatus) | |
| PDPetrobart d.o.o. SerbiaEnergy, Utilities & Waste Treatment | Construction structures and materials; auxiliary products to construction (except electric apparatus) Installation services (except software) | |
| TETC Energy Pančevo, SerbiaEnergy, Utilities & Waste Treatment | Construction structures and materials; auxiliary products to construction (except electric apparatus) Installation services (except software) Energetska Oprema Industrijski Konektori Hidraulički Alati | |
| MTMesser Tehnogas Beograd, SerbiaEnergy, Utilities & Waste Treatment | Construction structures and materials; auxiliary products to construction (except electric apparatus) Installation services (except software) Industrijski Gasovi Tečni Gasovi Balon Gas | |
| HHIP-Petrohemija Pančevo, SerbiaEnergy, Utilities & Waste Treatment | Construction structures and materials; auxiliary products to construction (except electric apparatus) Proizvodnja Petrohemijskih Proizvoda Proizvodnja Sirovina Proizvodnja Hemikalija | |
| ASAbi Solar Balkan Banatski Karlovac, SerbiaEnergy, Utilities & Waste Treatment | Installation services (except software) Solarna Energija Solarne Elektrane Solarni Paneli | |
| NNNAFTACHEM, Novi Sad, Serbia Sremska Kamenica, SerbiaEnergy, Utilities & Waste Treatment | Construction structures and materials; auxiliary products to construction (except electric apparatus) Uvoz Naftnih Derivata Transport Naftnih Derivata Veleprodaja Evrodizela | |