Whole Foods Market is the world's largest natural foods grocery chain. Founded in 1980. it pioneered the supermarket concept in natural and organic foods retailing. The company operates more than 470 stores throughout the US, Canada, and the UK and focuses on organic perishable and prepared products. It sells private-label items through its 365 Organic Everyday Value and Allegro Coffee lines, and offers a variety of non-GMO, vegan and gluten-free foods. In 2017 Amazon.com acquired Whole Foods, which generates sales mostly in the US, for about $13.7 billion.