Extra Space Storage Inc. — Extra Space Storage Inc. is a self-administered and self-managed REIT. As of September 30, 2026, the Company owned and/or operated 4,411 self-storage properties, which comprise approximately 3.0 million units and approximately 342.2 million square feet of rentable storage space operating under the Extra Space brand. The Company offers customers a wide selection of conveniently located and secure storage units across the country, including boat storage, RV storage and business storage. It is the largest operator of self-storage properties in the United States. Extra Space Storage Inc. was incor….· via yahoo