CommonWealth REIT operates as a real estate investment trust that primarily owns and leases office buildings throughout the United States of America. The company engages in the ownership and operation of real estate, including office and industrial buildings and leased industrial land. The company operates in three segments: Central Business District, Suburban Office Properties and Industrial and Other Properties. The Central Business District segment develops and markets real estate properties. The Suburban Office Properties segment owns and operates office properties and suburban office properties in the United States of America. The Industrial and Other Properties segment invests in, owns and operates offices and industrial real estate properties. The company was founded by Barry M. Portnoy on October 9, 1986 and is headquartered in Newton, MA.