Facility investors:
- Ball Packaging Evropa Belgrade doo Belgrade
- Cultural Center “Sveti Stefan, despot srpski”
- Flight control of Serbia and Montenegro SMATSA DOO Belgrade
- Municipality of Despotovac Municipal Administration of the Municipality of Despotovac
- Municipal Administration of the Municipality of Veliko Grdište
- Municipal Administration of the Municipality of Ljubovija
- Delta holding
- Delta Real Estate
- Delta Park Properties
- Delhaize Serbia
- Delhaize Montenegro
- C market
- Eko
- Ela
- Forma Ideale
- Komercijalna Bank
- Idea
- Elektrovojvodina
- Electric Power Industry of Serbia
- Nikola Tesla Airport – Belgrade
- Institution of student standard STUDENTSKI CENTAR NOVI SAD
- Archives of Yugoslavia
- Faculty of Economics, University of Belgrade
- General Hospital Subotica
- Air Serbia
- PC ADA CIGANLIJA
- Institute for Mother and Child “Dr Vukan Čupić” Radoja Dakića 6-8, Belgrade
- City Municipality Palilula
- Patriarchate of the Serbian Orthodox Church – Sveti arhijerejski sinod
Construction companies to which “Interfast” is subcontractor, co operant or constructor:
- DEKA Engineering doo Belgrade
- Bosch GmBh
- Exing b&p
- GIA
- W.D. Concord West
- Arxikon gradnja
- Interteam
- Gradina
- Flux Group
- Deneza M engineering
- Eurolux
- Blok 67 Associates
- GP Napred Ad
- AD Kozara
- Strabag d.o.o. Belgrade
- Energoprojekt Industrija AD
- Tehnomanija d.o.o. Belgrade
- Pet Prom d.o.o.