Franklin Street Properties Corp. (FSP) focuses on infill and central business district (CBD) office properties in the U.S. Sunbelt and Mountain West, as well as select opportunistic markets, with an emphasis on long-term growth and appreciation. It is a Maryland corporation that operates in a manner intended to qualify as a real estate investment trust (REIT) for federal income tax purposes. Its real estate operations include property acquisitions and dispositions, short-term financing, leasing, development and asset management. The company is based in Wakefield, Massachusetts, and was incorporated in Maryland in 1981.