Banca Popolare di Sondrio, a cooperative limited by shares under Italian law, was established in 1871 in the Italian town of Sondrio. A representative office was opened in Lugano in 1991. In 1995 was founded Banca Popolare di Sondrio (SUISSE) SA - bank governed by Swiss law, under the full control of the parent company.

BPS (SUISSE) is a universal bank mainly active in providing loans, portfolio management and trading in securities.