Sears Holdings Corporation is an American retailer formed in 2005 by the merger of Sears, Roebuck and Co., of Hoffman Estates, Illinois, with Kmart Holdings Corporation, of Troy, Michigan. The company operates 4,000 retail locations under the mastheads of Sears, Sears Grand, Sears Hometown Stores, Sears Hardware, Kmart, Big Kmart, Super Kmart, The Great Indoors, and Lands' End stores. It is the tenth largest retailer by annual revenue in the United States trailing behind Walmart, Kroger, Target, Walgreens, The Home Depot, Costco, CVS Caremark, Lowe's and Best Buy. The company maintains its corporate headquarters in Hoffman Estates. On November 17, 2004, Kmart Holdings Corporation announced its intention to purchase Sears, Roebuck and Co. The new corporation announced that it would continue to operate stores under both the Sears and Kmart brands. The merger of Kmart and Sears closed on March 24, 2005, following affirmative shareholder votes of both companies.