COPT Publishes 2018 Sustainability Report

Corporate Office Properties Trust (“COPT” or the Company) (NYSE: OFC) has posted its 2018 Sustainability Report in the ‘Latest Updates’ section of COPT’s Investors website: https://investors.copt.com/

Included in the 2018 Sustainability Report are selected highlights from the 2018 Global Real Estate Sustainability Benchmark (“GRESB”) survey where COPT earned its 4th consecutive Green Star rating. The GRESB annual survey is the global real estate industry’s most rigorous assessment of sustainability performance and its Green Star rating represents high achievement in each of the survey’s seven aspects.

COPT’s 2018 Sustainability Report outlines the Company’s dedication to providing transparency in environmental, social and governance ("ESG") practices that constitute its corporate sustainability platform.

About GRESB

GRESB’s mission is to enhance and protect shareholder value by assessing and empowering sustainability practices in the real asset sector. GRESB assesses the sustainability performance of real asset sector portfolios and assets in public, private and direct sectors worldwide. It offers environmental, social, and governance (“ESG”) data, scorecards, benchmark reports and portfolio analysis tools.

Its annual dynamic survey collects information regarding the sustainability performance of companies, funds and assets, including information on performance indicators, such as energy, GHG emissions, water and waste. Survey questions are guided by what investors and the industry consider to be material issues in the sustainability performance of real asset investments and are aligned with international reporting frameworks such as GRI and PRI. For more information, please refer to www.GRESB.com.

Company Information

COPT is a REIT that owns, manages, leases, develops and selectively acquires office and data center properties in locations that support the United States Government and its contractors, most of whom are engaged in national security, defense and information technology (“IT”) related activities servicing what it believes are growing, durable, priority missions (“Defense/IT Locations”). The Company also owns a portfolio of office properties located in select urban/urban-like submarkets in the Greater Washington, DC/Baltimore region with durable Class-A office fundamentals and characteristics (“Regional Office Properties”). As of March 31, 2019, the Company derived 89% of its core portfolio annualized revenue from Defense/IT Locations and 11% from its Regional Office Properties. As of the same date and including six buildings owned through an unconsolidated joint venture, COPT’s core portfolio of 163 office and data center shell properties encompassed 18.2 million square feet and was 93.7% leased; the Company also owned one wholesale data center with a critical load of 19.25 megawatts.