Along with Sarajevo and Banja Luka, it is the largest financial center in Bosnia and Herzegovina. One of three largest banks in the country has its headquarters in Mostar. Bosnia and Herzegovina has three national electric, postal and telecommunication service corporations; the seat of one per each group is placed in Mostar (electric utility provider Elektroprivreda HZHB, postal service company Hrvatska pošta Mostar and HT Eronet, the third largest telecommunication company in the country). These three companies (along with banks and aluminium factory) make a vast portion of overall economic activity in the city.