With a market cap of $29.1 billion, Extra Space Storage Inc. (EXR) is a self-administered and self-managed real estate investment trust (REIT). As of September 30, 2025, the company owned or operated 4,238 self-storage facilities across 43 U.S. states and Washington, D.C., totaling about 2.9 million units and 326.9 million square feet of rentable space.
Companies valued $10 billion or more are generally classified as “large-cap” stocks, and Extra Space Storage fits this criterion perfectly. Operating under the Extra Space brand, it provides a wide range of secure storage options, including boat, RV, and business storage and is the largest operator of self-storage properties in the United States.
