Luka Koper and Istrabenz have sold 8,857 shares each for 4,561,355 euro ($6.4 million), the two companies said in separate statements.
Intereuropa has sold 8,856 shares in Banka Koper for 4,560,840 euro, it said in another statement.
Intesa Sanpaolo owned 91.21% of Banka Koper in April 2007, according to the Slovenian bank's website.
($ = 0.7176 euro)