Walgreens Boots Alliance, Inc. is an American holding company headquartered in Deerfield, Illinois, that owns Walgreens, Boots, and a number of pharmaceutical manufacturing, wholesale, and distribution companies. The company was formed on December 31, 2014, after Walgreens purchased the 55% stake in UK and Switzerland-based Alliance Boots that it did not already own. The total price of the acquisition was $4.9 billion in cash and 144.3 million common shares with fair value of $10.7 billion. Walgreens had previously purchased 45% of the company for $4.0 billion and 83.4 million common shares in August 2012 with an option to purchase the remaining shares within three years. Walgreens became a subsidiary of the newly created company after the transactions were completed. The company is organized into three divisions: Retail Pharmacy USA , Retail Pharmacy International , and Pharmaceutical Wholesale, incorporating Alliance Healthcare. The new holding company began trading on the NASDAQ on December 31, 2014.