Founded in 1951 by brothers Don and David Ellis Smith, the company initially focused on small renovation projects. Today, EllisDon is renowned for its large-scale projects, including significant upgrades to the Art Gallery of Ontario and its role in constructing Brampton Civic Hospital.

In 2021, EllisDon reported impressive revenues of $4.97 billion, solidifying its position as one of the most prominent construction firms in Canada.

As an employee-owned company, EllisDon’s history dates back to its origins in London, Ontario. Now based in Mississauga, the company operates privately with a dedicated workforce of over 4,500 employees. Notable leaders within the company include Geoff Smith, Executive Chairperson, and Kieran Hawse, President and CEO.