This would make Walgreen the largest drugstore chain and the second largest pure retailer in the United States.

Even if Walgreen is forced to sell or close up to 1,000 Rite Aid locations to comply with U.S. antitrust laws, it would still operate around 16,355 stores worldwide and 11,773 locations in the USA. Note that some analysts think that Walgreen might end up closing as many as 3,000 stores, according to Fortune.