Public Storage is a real estate investment trust (REIT). The Company is engaged in the ownership and operation of self-storage facilities and other related operations including tenant reinsurance and third-party self-storage management. It offers storage spaces for lease on a month-to-month basis, for personal and business use. Its segments include Self-Storage Operations and Ancillary Operations. The Self-Storage Operations segment includes the aggregated rental operations from the self-storage facilities it owns from same store facilities, acquired facilities, developed, and expanded facilities, and other non-same store facilities. The Ancillary Operations segment includes combined operations of its tenant reinsurance, merchandise sales, and third-party property management segments. The Company owns interests in approximately 3,049 self-storage facilities (an aggregate of 219 million net rentable square feet of space) operating under the Public Storage name.