Shopko announced that it is planning to shutdown its remaining 120 stores. In February, the struggling retailer stated it was closing several South Dakota stores, including Rapid City. All stores are expected to be closed by mid-June including stores in Hot Springs, Custer, Sturgis and Belle Fourche. ShopKo said Monday the company was unable to find a buyer for its business. The retailer, headquartered near Green Bay, filed for bankruptcy protection in January, citing excessive debt and ongoing competitive pressure, and began announcing store closings. ShopKo began with a store in Green Bay in 1962.