Office Properties Income Trust Common shares of beneficial interest

Office Properties Income Trust is a national REIT focused on owning and leasing office properties to high credit quality tenants in markets throughout the United States. As of June 30, 2026, approximately 62% of OPI's revenues were from investment grade rated tenants. OPI owned 122 properties as of June 30, 2026, with approximately 17.1 million square feet located in 29 states and Washington, D.C. OPI is managed by The RMR Group, a leading U.S. alternative asset management company with over 37 billion dollars in assets under management as of June 30, 2026, and 40 years of institutional experience in buying, selling, financing and operating commercial real estate. Office Properties Income Trust is based in Newton, Massachusetts. Office Properties Income Trust was established in February 17, 2009, and incorporated in Maryland.