DeMoulas Super Markets, Inc., under the trade name Market Basket, is a chain of 80 supermarkets in New Hampshire, Massachusetts, and Maine in the United States, with headquarters in Tewksbury, Massachusetts.From 1990 through late August 2014, the company was the center of a controversy over ownership and leadership, which culminated in protests receiving international media attention. On August 27, 2014, an agreement was reached between its feuding owners to sell the 50.5% stake of the company owned by the family of Arthur S. Demoulas to his cousin Arthur T. Demoulas for $1.5 billion.