It depends on the chain. Aldi's, Trader Joe's exclusively use white label brands, so they have complete control of their suppliers. Walmart and Costco are big e

It depends on the chain. Aldi's, Trader Joe's exclusively use white label brands, so they have complete control of their suppliers. Walmart and Costco are big enough to have their own logistics. But for most other supermarket chains, it's the suppliers that dictate the price. The stores essentially lease out their shelves directly to the distributors or manufacturers.