The Bank of Montreal, operating as BMO Financial Group, is a Canadian multinational banking and financial services corporation. One of the Big Five banks in Canada, it is the fourth-largest bank in Canada by market capitalization and assets, as well as one of the ten largest banks in North America. It is commonly known by its acronym BMO (pronounced /ˈbiːmoʊ/), which is also its stock symbol on both the Toronto Stock Exchange and the New York Stock Exchange. On June 23, 1817, John Richardson and eight merchants signed the Articles of Association to establish the Bank of Montreal in a rented house in Montreal, Quebec. The bank officially began conducting business on November 3, 1817, making it Canada's oldest bank. BMO's Institution Number (or bank number) is 001. In Canada, the bank operates as BMO Bank of Montreal and has more than 900 branches, serving over seven million customers. The company also has substantial operations in the Chicago area and elsewhere in the United States, where it operates as BMO Harris Bank. BMO Capital Markets is BMO's investment and corporate banking division, while the wealth management division is branded as BMO Nesbitt Burns.