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. The Company’s tenants include the USG and their defense contractors, who are primarily engaged in priority national security activities, and who generally require mission-critical and high security property enhancements. Wikipedia