"The net profit rose by 2.0% compared to the same period last year mainly due to the increased revenue from interests and revenue from commissions and fees," PBZ, which is majority owned by Italian banking group Intesa Sanpaolo, said in a statement.
The combined assets of the group rose by 10% from the end of 2007 to 72 billion kuna at the end of September.
The net profit of the parent bank PBZ grew by 6.0% to 819 million kuna. All members of PBZ Group performed well in the nine-month period, the statement added.
PBZ Bank was the second largest Croatian bank by assets as of the end of June with total assets of 60.7 billion kuna, figures from the country's central bank indicated.
All of PBZ's subsidiaries ended the third quarter in the black. The PBZ group includes smaller bank Medjimurska Banka, card issuer PBZ Card, fund manager PBZ Invest, leasing house PBZ Leasing, as well as PBZ Croatia Osiguranje mandatory pension fund.
PBZ shares last traded down 6.38% at 640 kuna on the Zagreb bourse at 1530 local time (1330 GMT) on Wednesday. Its stock is part of the 28-share Crobex index of the Zagreb Stock Exchange.
(1 euro = 7.1451 Croatian kuna)