Headquartered in Ann Arbor, Michigan, Borders Group, Inc., is a publicly held company. Borders Group stock trades on the New York Stock Exchange under the symbol BGP. Borders Group operates over 509 Borders superstores in the U.S.; 32 Borders stores outside the U.S., in Australia, New Zealand, Singapore and Puerto Rico; and approximately 485 stores in the Waldenbooks Specialty Retail segment, including Waldenbooks, Borders Express, Borders airport stores, and Borders Outlet. Borders Group owns London-based Paperchase Products Limited, a retailer of stationery, cards and gifts with approximately 120 locations outside the U.S., including stand-alone stores and concessions. There are also more than 317 Paperchase shops located within U.S. Borders superstores and the company opened its first stand-alone Paperchase shop in the U.S. on Boston's Newbury Street in 2007.