Sam's Club and Sam's Warehouse make up a members-only wholesale warehouse club that offers brand-name merchandise for both home and business. Founded in 1983, Sam's is owned and operated by Walmart Stores and is named after Walmart founder Sam Walton. The Naperville location is conveniently located in the Fox River Commons across from the Woodfield Shopping Mall on Route 59. This location includes a gas station, optical shop and pharmacy. Membership is required.