Its founders included Ljudevit Gaj, Dimitrija Demeter, Antun Mažuranić, Ambroz Vranyczany [hr], Franz von Kulmer [de], and Anastas Popović [sr].

[4]: 82  Following the Austro-Hungarian Compromise of 1867, more liberal Hungarian legislation allowed the bank to expand its range of activities and to pay dividends to individual shareholders, by which it acquired widespread appeal as a badge of South Slavic pride and self-awareness.

[5] After the disruption of World War I, Zagreb emerged as the dominant financial center of the newly formed Kingdom of Yugoslavia, and the First Croatian Savings Bank administered 40 percent of all deposits in the city.

[2]: 35  By 1924, it had branches in Belgrade, Bjelovar, Slavonski Brod, Celje, Crikvenica, Čakovec, Daruvar, Delnice, Đakovo, Dubrovnik, Đurđevac, Ilok, Karlovac, Kraljevica, Križevci, Ljubljana, Maribor, Sremska Mitrovica, Nova Gradiška, Novi Sad, Ogulin, Osijek, Požega, Senj, Sisak, Skopje, Split, Subotica, Sušak, Sveti Ivan Zelina, Varaždin, Velika Gorica, Vinkovci, Virovitica, Vukovar, Zemun as well as Fiume.

[6] In 1928, it took over the United Central Bank of Sarajevo (Serbo-Croatian: Ujedinjena centralna banka), resulting in further branches in Banja Luka, Bihać, Brčko, Derventa, Mostar, Travnik, and Tuzla.