Luka Koper's shares closed at 23.4 euro, up 2.63%.
The SBITOP index, which tracks the most liquid and capitalised stocks on the LJSE, closed at 899.02 points, up 0.23%.
Insurer Zavarovalnica Triglav [LJE:ZVTG] fell the most among the blue chips. The company’s shares closed 1.20% lower at 32.9 euro.
Reinsurer Sava Re [LJE:POSR] contributed more than half of the LJSE's trading turnover on Wednesday, or 198,740 euro.
The bourse's total trading turnover rose to 906,730 euro ($1.0 million) from 367,660 euro on Tuesday.
($ = 0.90258 euro)