Public Storage (PSA), an esteemed Real Estate Investment Trust (REIT) and a constituent of both the S&P 500 and FT Global 500 indices, concentrates its operations on the acquisition, development, ownership, and management of self-storage properties. By September 30, 2020, the company's substantial holdings included 2,504 self-storage facilities located across 38 U. S. states, collectively providing around 171 million net rentable square feet.