Petro-Canada is a retail and wholesale marketing brand of Suncor Energy. Until 1990, it was a crown corporation of Canada (as a state trading enterprise), headquartered at the Petro-Canada Centre in Calgary, Alberta.
In August 2009, Petro-Canada merged with Suncor Energy, with Suncor shareholders receiving approximately 60 percent ownership of the combined company and Petro-Canada shareholders receiving approximately 40 percent. The company retained the Suncor Energy name for the merged corporation and its upstream operations. It continues to use the Petro-Canada brand nationwide, except in Newfoundland and Labrador, for downstream retail operations.