Based in Calgary, Alberta, Landmark operates 36 theatres with 299 screens,[2] primarily in Ontario and western Canada.

It was adopted in 1974 after the purchase of Rothstein Theatres, which was the first big expansion for the company, adding about 15 locations (some closed immediately or sold and were never operated by Landmark).

It later added the Kanata and Whitby locations that were to be sold to Cineplex Entertainment, plus Ottawa's World Exchange Plaza.

Landmark Cinemas operated the World Exchange Plaza theatre on a management contract from November 1 to December 31, 2013, after which its lease expired.

[8][9] In September 2017, Landmark announced its sale to the Belgian exhibitor Kinepolis for $123 million, pending regulatory approval.