SIF 5 Oltenia bought 383,165 BVB shares, the fund said in a statement filed with the bourse on Wednesday.
BVB started trading its shares on its own platform in June 2010.
In regular trading, blue-chip BVB's shares were up 0.95% at 20.19 lei by 1131 GMT.
(1 euro = 4.5318 Romanian lei)