Jedinstvo closed 5.70% lower at 6,601 dinars in a volume of 30 shares.
At the other end, Fintel Energija [BEL:FINT], the Serbian subsidiary of Italy's Fintel Energia Group, led the blue-chip gainers, adding 1.54% to 660 dinars.
Oil and gas company NIS [BEL:NIIS] generated the day's largest turnover. A total of 18,748 NIS shares changed hands in a turnover of 15.9 million dinars. NIS closed 0.24% lower at 845 dinars.
The broader BELEXline, a free-float market capitalisation weighted index, closed 0.51% lower at 2,200.05 points.
Total turnover on the Belgrade bourse rose to 20.5 million dinars ($189,900/175,400 euro) on Friday from 5 million dinars on Thursday. Trading in Treasury bonds accounted for 2.8 million dinars of Thursday's turnover.
Between May 20 and May 24 the BELEX15 rose 0.28% while the BELEXline increased 0.27%. Total trading turnover on the Belgrade Stock Exchange fell to 57.1 million dinars this week, from 159.4 million dinars last week.
1 euro = 117.119 dinars