Pennsylvania Real Estate Investment Trust (PREIT) owns, either outright or through partnerships, about three dozen enclosed shopping malls and six strip and power centers, as well as several retail properties under development. The REIT's portfolio contains more than 30 million sq. ft. of retail space in a dozen states concentrated in the mid-Atlantic region, with a focus on Pennsylvania. The company also provides construction management, development, leasing, marketing, and property management services. It counts retailers such as Foot Locker, J.C. Penney, The Gap, Macy's, and Sears among its largest tenants. Founded in 1960, PREIT was one of the first publicly traded REITs in the US.