42-44 are also mechanical floors; level 45 was originally an indoor observation deck but was closed in the 1970s. The top of the tower are actually an open-air raised partition, built sometime after construction, that hides the rooftop elevator control rooms. Without this extra structure, the actual roof height is , and approximately when counting the elevator penthouse. It is the fifth tallest building in Montreal, but an antenna raises the total height to , the tallest pinnacle in Montreal. Until the end of 2018, French-language radio station CKOI-FM transmitted its 307,000 watt signal from atop the building. The antenna has since been removed. Tenants Canadian Imperial Bank of Commerce Euler Hermes Macquarie Group Russell Investments Stikeman Elliott LLP Vilaron Corporation Linkeo.com MNP LLP ACE Aviation Holdings Parkland Fuel Corporation See also List of tallest buildings in Montreal Old Royal Bank Building, Montreal Molson Bank Building, Montreal Bank of Montreal Head Office, Montreal Old Canadian Bank of Commerce Building, Montreal Commerce Court, Toronto Commerce Place I and Commerce Place II References External links Official website Office buildings completed in 1962 Canadian Imperial Bank of Commerce Skyscrapers in Montreal Bank buildings in Canada International style architecture in Canada Downtown Montreal Peter Dickinson (architect) buildings 1962 establishments in Quebec Skyscraper office buildings in Canada