The Bank of Montreal is a Canadian multinational investment bank and financial services company. The bank was founded in Montreal, Quebec, in 1817 as Montreal Bank; while its head office remains in Montreal, the operational headquarters and executive offices have been located in Toronto, Ontario since 1977. One of the Big Five banks in Canada, it is the fourth-largest bank in Canada by market capitalization and assets, and one of the ten largest banks in North America. It is commonly known by its ticker symbol BMO, on both the Toronto Stock Exchange and the New York Stock Exchange. In October 2021, it had CA$634 billion in assets under administration. The Bank of Montreal swift code is BOFMCAM2 and the institution number is 001. On 23 June 1817, John Richardson and eight merchants signed the Articles of Association to establish the Montreal Bank in a rented house in Montreal, Quebec. The bank officially began conducting business on 3 November 1817, making it Canada's oldest bank. It underwent a name change to its current in 1822. BMO's Institution Number is 001. Wikipedia