Walgreens Boots Alliance ranks 4th on our list of the top 50 grocery stores in North America. Walgreens Boots Alliance, Inc. is an American holding company headquartered in Chicago, Illinois, that owns Walgreens, Boots, and several pharmaceutical manufacturing, wholesale, and distribution companies. Last year, the US retail segment of Walgreens Boots Alliance generated USD 104,532 million in sales with 6.24% year-over-year growth in sales.