COPT DEFENSE PROPERTIES

COPT Defense Properties ( COPT Defense ) and subsidiaries (collectively, the Company , we or us ) is a fully-integrated and self-managed real estate investment trust ( REIT ) focused on owning, operating and developing properties in locations proximate to, or sometimes containing, key U.S. Government ( USG ) defense installations and missions (which we refer to herein as our Defense/IT Portfolio). Our tenants include the USG and its defense contractors, who are primarily engaged in priority national security activities, and who generally require mission-critical and high security property enhancements. Our property portfolio is predominantly comprised of office properties and single-tenant data center shells. As of December 31, 2025, our Defense/IT Portfolio included: 201 operating properties totaling 23.2 million square feet. We owned 24 of these properties totaling 4.3 million square feet through unconsolidated real estate joint ventures; fiveproperties under development that will total approximately 646,000 square feet upon completion; and approximately 1,000 acres of land controlled that we believe could be developed into approximately 10.6 million square feet. We also owned sixother operating properties totaling 2.0 million square feet and approximately 50 acres of other developable land in the Greater Washington, DC/Baltimore region as of December 31, 2025. We conduct almost all of our operations and own almost all of our assets through our operating partnership, COPT Defense Properties, L.P.