Equity Commonwealth is an internally managed and self-advised real estate investment trust (REIT). The Company is engaged in the ownership and operation of office buildings throughout the United States. It operates in central business district properties and suburban properties segment. The Company's portfolio includes approximately 60 properties (over 130 buildings) with a combined of approximately 24 million square feet. It leases its properties to over 1,000 tenants. Its properties include Parkshore Plaza, Leased Land/Vineyards, Sky Park Centre, Georgetown-Green and Harris Buildings, Executive Park, Cabot Business Park Land, Danac Stiles Business Park, East Eisenhower Parkway, North Point Office Complex, Raintree Industrial Park, Cherrington Corporate Center, Foster Plaza, Bridgepoint Parkway, Lakewood on the Park and Research Park. Its properties are located in Alabama, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Hawaii and Illinois, among others.