The deal announced in March 2023 includes all of the company's retail assets in Germany and the Netherlands, plus a 60% controlling interest in its Belgium and Luxembourg entities.
The acquisition by the Laval-based convenience store and gas station operator was valued at 3.1 billion euros.
It involves more than 2,000 service stations, with just over half of them in Germany.
Couche-Tard president and CEO Brian Hannasch says the deal brings the company into four new countries.
He says it significantly expands Couche-Tard's reach in Europe.