Extra Space Storage is a real estate investment trust headquartered in Cottonwood Heights, Utah that invests in self storage units. As of December 31, 2021, the company owned and/or operated 2,096 locations in 41 states, and Washington, D.C. comprising approximately 160.9 million square feet of net rentable space in 1.5 million storage units. It is the 2nd largest owner of self storage units in the United States and the largest self storage property manager.