Bank Saderat Iran (BSI) (Persian: بانک صادرات ایران, Bank Sadârat Iran, lit. "Export Bank of Iran") is an Iranian multinational banking and financial services company headquartered in Tehran, Iran. It is Iran's largest bank. It was founded in Tehran in 1952 by the prominent Mofarrah and Bolurfrushan (also spelled Bolourforoushan) families, represented in the first board by Mohammad Ali Mofarrah and Mohammad Bolurfrushan and commenced operation on 13 November 1952 with a board of three directors and 20 employees.