Luka Koper's shares went up 1.45% to 35.0 euro on Thursday, LJSE data showed.
Banking group Nova Ljubljanska Banka (NLB) [LJE:NLBR] was the only blue chip loser, with shares falling 0.48% to 104.50 euro.
Pharmaceutical company Krka [LJE:KRKG] was also the most traded company on the bourse, generating a turnover of 899,902 euro.
The blue-chip SBITOP index closed at 1,420.02 points, up 0.28%, whereas the SBITOP TR index, which also tracks dividend distribution, also grew 0.28%, ending the trading session at 1,921.81 points.
Total daily regulated market turnover totalled 1.6 million euro ($1.7 million) on Thursday, down from 1.7 million euro on Wednesday.
($ = 0.9319 euro)