Tile Shop Holdings, Inc. operates as a specialty retailer of manufactured and natural stone tiles, setting and maintenance materials, and related accessories in the United States. It offers approximately 4,000 products, including marble, travertine, granite, quartz, sandstone, slate, and onyx tiles; and ceramic, porcelain, glass, cement, wood look, and metal tiles primarily under the Rush River and Fired Earth brands. The company also manufactures setting and maintenance materials, such as thinset, grout, sealers, and accessories, including installation tools, shower and bath shelves, drains, and similar products under the Superior brand name. As of March 1, 2018, it operated 140 stores in 31 states and the District of Columbia with an average size of 20,300 square feet. The company also sells its products through its Website, tileshop.com. Tile Shop Holdings, Inc. was founded in 1985 and is headquartered in Plymouth, Minnesota.