HPB's shares rose 7.41% to 232 euro on Wednesday.
At the other end, shipping company Atlantska Plovidba [ZSE:ATPL] was the biggest daily loser, as its shares decreased 3.00% to end at 48.50 euro.
The 20-share benchmark CROBEX went up 0.64% to close at 2,730.05 points, recording a four-day winning streak.
The narrower equity index CROBEX10, which tracks the top ten issuers in terms of free float, market capitalisation and liquidity, rose 0.58% to 1,630.64 points.
The regular turnover came in at 2.1 million euro ($2.3 million) on Wednesday, up from 1.1 million euro on Tuesday.
ICT equipment producer Ericsson Nikola Tesla [ZSE:ERNT] generated the biggest daily turnover of 470,817 euro. Its shares closed 0.95% lower at 209 euro.
($ = 0.925 euro)