Asda Stores Ltd. trading as Asda, is a British supermarket retailer, headquartered in Leeds, West Yorkshire. The company was founded in 1949 when the supermarket owning Asquith family merged with the Associated Dairies company of Yorkshire. It expanded into the south of England during the 1970s and 1980s, and acquired Allied Carpets, 61 large Gateway Supermarkets and other businesses, such as MFI, then sold off its acquisitions during the 1990s to concentrate on the supermarkets. It became a subsidiary of the American retail giant Walmart after a £6.7 billion takeover in July 1999, and was the second-largest supermarket chain in Britain between 2003 and 2014 by market share, and is currently third behind Tesco and Sainsbury's.