The 20-share benchmark CROBEX advanced 0.69% to 2,804.03 points.
The narrower equity index CROBEX10, which tracks the top ten issuers in terms of free float, market capitalisation and liquidity, gained 1.31% to close at 1,685.39 points.
Hrvatski Telekom was the most traded company with a turnover of 370,200 euro ($405,200), as its shares surged 2.42% to 29.60 euro.
Shares of Hrvatska Postanska Banka [ZSE:HPB] fell 0.86% to 230 euro in a turnover of 259,300 euro.
Blue-chip shares of hotel owner and manager Valamar Riviera [ZSE: RIVP] rose 0.83% to 4.88 euro in a turnover of 149,000 euro.
Shares of Podravka went up 2.28% to 157 euro in a turnover of 115,000 euro.
Koncar Elektroindustrija soared 2.27% to 270 euro in a turnover of 109,000 euro.
The regular turnover fell to 1.7 million euro from 3.9 million euro on Tuesday, amidst lower trading with government bonds.
($ = 0.914 euro)