Including their brandname chains:
- Atlantic Cash & Carry
- Atlantic Superstore
- Axep
- Bloor Street Market
- Dominion
- Les Entrepôts Presto
- Extra Foods
- Fortinos
- Freshmart
- L’Intermarché
- Loblaws / Loblaw GreatFood / Loblaws CityMarket
- Lucky Dollar Foods
- Maxi / Maxi & Cie
- NG Cash & Carry
- No Frills
- Provigo
- Real Canadian Superstore
- Shop Easy Foods
- Shoppers Drug Mart / Pharmaprix
- SuperValu
- T & T Supermarket
- Valu-mart
- Wholesale Club / Club Entrepôt
- Your Independent Grocer / Independent CityMarket
- Zehrs Markets
Yes there are other big oligopoly chains like metro, Sobeys/Safeway, Pattison, but I think it’s best to start with one major chain to see how much coordinated action can affect them.
The only alternatives in my town are Walmart (the human rights violation company) or Sobeys (the wallet rapists). Maybe I can eat Shin-cup noodles for a month.