The bank will offer the unsubscribed shares in the second phase of the capital increase, which will last from October 21 until October 27, it said in a statement.
Banka Celje said last month it will offer its shareholders 69,205 ordinary shares at a price of 413 euro each and 17,301 preference shares at a price of 371 euro each, seeking to raise a total of 35 million euro.
In a separate statement on Thursday, Banka Celje said it had a gross profit of 21.6 million euro in the first nine months of 2008, but gave no comparative figure. The bank's assets rose by an annual 5.0% to 2.426 billion euro through September.
The bank's biggest single shareholder is Slovenia’s largest bank by assets, Nova Ljubljanska Banka, with a 49.4% stake at the end of June.
Banka Celje is a privately-owned universal bank. At the end of June, it had 36 outlets in Slovenia, employed 613 and had a market share of around 6.0% in terms of assets.
Eighteen banks operate in Slovenia, a member of the eurozone since 2007.
($ = 0.7435 euro)