With a market cap of $31.2 billion, Extra Space Storage Inc. (EXR) is a leading self-storage real estate investment trust (REIT). As of June 30, 2025, the company owned and/or operated 4,179 stores across 43 states and Washington, D.C., comprising approximately 2.9 million units and 321.5 million square feet of rentable space. Companies valued at$10 billion or more are generally classified as “large-cap” stocks, and Extra Space Storage fits this criterion perfectly. Recognized as the largest operator of ...