Valu-mart (styled as valu-mart) is a chain of supermarkets based in Ontario, Canada. It is a unit of National Grocers, itself a unit of Loblaw Companies Limited, Canada's largest food distributor.Stores are typically operated by a franchise owner. The stores operate in smaller locations than others operated by Loblaw Companies Limited, and are often opened in former locations where other Loblaw Companies Limited stores had been, including those formerly operated under the Zehrs or Mr.