News Details

Franklin Street Properties Corp. Added to MSCI US REIT Index

December 6, 2005

WAKEFIELD, MA -- (MARKET WIRE) -- 12/06/05 -- Franklin Street Properties Corp. (AMEX: FSP) today announced that it has been added to the MSCI US REIT Index (formerly known as the Morgan Stanley REIT Index, the "Index"), effective as of November 30, 2005.

George J. Carter, Chairman and Chief Executive Officer, said, "We welcome Franklin Street Properties' addition to the MSCI US REIT Index. We believe our inclusion in the Index will increase FSP's visibility to a broad spectrum of potential investors."

The Morgan Stanley Capital International Inc. website (www.msci.com) describes the Index as follows:

        "The MSCI US REIT Index is a free float-adjusted market
        capitalization weighted index that is comprised of equity
        REITs that are included in the MSCI US Investable Market
        2500 Index, with the exception of specialty equity REITs
        that do not generate a majority of their revenue and income
        from real estate rental and leasing operations. The index
        represents approximately 85% of the US REIT universe.

        "The MSCI US REIT Index is an end of day, gross return index,
        available via Bloomberg and Reuters. The index is also
        available as a price-only index that is calculated by MSCI
        in real time and distributed by the American Stock Exchange
        over Network B of the Consolidated Tape Association, and by
        MSCI to Reuters and Bloomberg with the symbol RMZ."

About Franklin Street Properties

Franklin Street Properties Corp. (AMEX: FSP) is a real estate investment trust based in Wakefield, Massachusetts, focused on achieving current income and long-term growth through investments in commercial properties. Since its origination in 1997, FSP has applied uncompromising discipline to its real estate investing. These disciplines have been learned over many years of property investment. FSP operates in two business segments: real estate operations and investment banking/investment services. FSP owns an unleveraged portfolio of real estate. The majority of FSP's property portfolio is suburban office buildings. Through a wholly owned subsidiary, FSP Investments LLC (member, NASD and SIPC), a real estate investment banking firm and registered broker/dealer, the company organizes single purpose entities that own real estate, and conducts the private placement of equity to capitalize those entities. To learn more about Franklin Street Properties please visit our website at www.franklinstreetproperties.com

Contact:
Franklin Street Properties CorpDonna Brownell
877-686-9496
www.franklinstreetproperties.com