The 
Bank of Montreal, 
doing business as BMO Financial Group, is a Canadian multinational 
investment bank and 
financial services company headquartered in 
Montreal, Canada. 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, which is also its stock symbol on both the 
Toronto Stock Exchange and the 
New York Stock Exchange.