Public Storage is a real estate investment trust. The Company's business activities include the ownership and operation of self-storage facilities, which offer storage spaces for lease, generally on a month-to-month basis, for personal and business use, ancillary activities, such as merchandise sales and tenant reinsurance to the tenants at its self-storage facilities, as well as the acquisition and development of additional self-storage space. It operates through Self-Storage Operations, Ancillary Operations, Investment in PS Business Parks, Inc. (PSB) and Investment in Shurgard Europe segments. It also has direct and indirect equity interests in over 30 million net rentable square feet of commercial space located in over nine states in the United States primarily owned and operated by PSB under the PS Business Parks name. It manages approximately 30 self-storage facilities for third parties, and has equity interests in and manages over 12 additional self-storage facilities.