What store/companies have their own brand of powdered formula?

Costco and sams club have their own brand and so does kmart. The generic powdered formula will say (compared to similac advance) or (compared to enfamil lipil) that's because its the same exact formula has the same exact ingredients and everything. The generic ones are also made by the same company and then distributed to stores like target and kmart and walmart who then put their name on it. I find kmart to be the cheapest and actually until july 11th their cans of powdered formula are all $2 off! They usually have deals like this every other month or so!