OPI is a national REIT focused on owning and leasing high quality office and mixed-use properties in select growth-oriented U.S. markets. As of December 31, 2023, approximately 64% of OPI's revenues were from investment grade rated tenants. OPI owned 152 properties as of December 31, 2023, with approximately 20.5 million square feet located in 30 states and Washington, D.C. In 2023, OPI was named as an Energy Star® Partner of the Year for the sixth consecutive year. OPI is managed by The RMR Group (Nasdaq: RMR), a leading U.S. alternative asset management company with over $41 billion in assets under management as of December 31, 2023, and more than 35 years of institutional experience in buying, selling, financing and operating commercial real estate. OPI is headquartered in Newton, MA.