Founded in 1912, Weis Markets is a publicly traded chain of more than 150 grocery stores that serves clients in Maryland, New Jersey, New York and West Virginia. Its stores operate under the names of Weis and Mr. Z's. The chain has a warehouse facility in Milton in Pennsylvania. Weis Markets SuperPetz division operates over 25 pet supply warehouse stores in nearly five eastern U.S. states. It has a staff of approximately 17,000 individuals. The chain is also one of the largest purchasers of produce and dairy products in Pennsylvania. Weis Markets maintains bakery, seafood and deli departments. In addition, it offers online product ordering services.