The 20-share benchmark CROBEX advanced 0.41% to end at 2,699.63 points, its highest level for at least five years.
The narrower equity index CROBEX10, tracking the top ten issuers in terms of free float, market capitalisation and liquidity, went up 0.42% to register its new all-time high, 1,615.27 points.
HPB was the most liquid company with a turnover of 264,400 euro ($283,000) as its shares soared 1.94% to 210 euro.
Blue-chip shares of ICT solutions provider Ericsson Nikola Tesla [ZSE:ERNT] dropped 1.44% to 205 euro in a turnover of 215,000 euro.
Shares of Zagrebacka Banka [ZSE:ZABA] appreciated 0.54% to 18.75 euro in a turnover of 130,000 euro. They are part of the wider index.
Index heavyweight food and pharmaceuticals producer Podravka [ZSE:PODR] rose 0.30% to 166 euro in a turnover of 83,000 euro.
The regular turnover on the Zagreb bourse declined to 1.3 million euro from 1.4 million euro on Monday.
($ = 0.934 euro)