Meijer, Inc. () is a regional American big-box store chain with its corporate headquarters in Walker, Michigan, in the Grand Rapids metropolitan area; the facility has a Grand Rapids, Michigan address. Founded in 1934 as a supermarket chain, Meijer is credited with pioneering the modern supercenter concept in 1962. About half of the company's 200 stores are located in Michigan's Lower Peninsula, with additional locations in Illinois, Indiana, Ohio, Wisconsin, and Kentucky. Meijer has no affiliation with Fred Meyer. The chain was ranked No. 19 on Forbes' 2014 list of "America's Largest Private Companies" and 19 in Fortune's 2008 "The 35 largest U.S. private companies". Supermarket News ranked Meijer No. 12 in the 2007 "Top 75 North American Food Retailers" based on 2006 fiscal year estimated sales of $13.2 billion. Based on 2013 revenue, Meijer is the 27th-largest retailer in the United States.