COPT Defense Properties, an S&P MidCap 400 Company, is a fully integrated and self-managed REIT focused on owning, operating and developing properties in locations proximate to, or sometimes containing, key U.S. Government defense installations and missions, referred to as its Defense/IT Portfolio.

COPT Defense Properties was initially founded in Minnesota in 1988 as Royale Investments, Inc., eventually developing into an externally advised REIT.

In October 1997, Royale Investments acquired the Mid Atlantic operations of The Shidler Group.

Corporate Office Properties Trust, became a public company on April 23, 1998, by listing its shares on the NYSE under the ticker symbol OFC.

In September 2023, the Company changed its name from Corporate Office Properties Trust to COPT Defense Properties, and changed its NYSE ticker symbol to CDP, to better describe its investment strategy’s focus on locations serving U.S. priority defense activities.