Piggly Wiggly is an American supermarket chain operating in the American Southern and Midwestern regions run by Piggly Wiggly, LLC, an affiliate of C&S Wholesale Grocers. Its first outlet opened in 1916 in Memphis, Tennessee, and is notable for having been the first true self-service grocery store, and the originator of various familiar supermarket features such as checkout stands, individual item price marking and shopping carts. The current company headquarters is in Keene, New Hampshire. There are a total of 499 independently owned Piggly Wiggly stores that operate across 18 states, primarily in smaller cities and towns.