The companies "have significant presence in Alberta's telecommunications market and their successes and failures will impact Alberta's consumers, workers, and, potentially, other aspects of Alberta's economy," according to the notice posted on the competition tribunal's website.

Shaw is based in Calgary, Alberta, while Rogers is based in Toronto.

($1 = 1.3046 Canadian dollars)

(Reporting by Ismail Shakil in Ottawa and Divya Rajagopal in Toronto; Editing by Chizu Nomiyama)