PS Business Parks, Inc., a Real Estate Investment Trust (REIT) included in the S&P MidCap 400 index, specializes in the acquisition, development, ownership, and management of commercial real estate. Its portfolio primarily consists of multi-tenant industrial properties, flexible-use spaces, and office buildings. As of September 30, 2020, the company's holdings amounted to 27.5 million rentable square feet, entirely owned by the company, serving approximately 5,000 commercial clients across six states.