With a market cap of 27.5 billion, Extra Space Storage Inc. (EXR) is a self-administered and self-managed REIT and a member of the S&P 500. As of September 30, 2025, it owned and/or operated 4,238 self-storage stores across 43 states and Washington, D.C., totaling approximately 2.9 million units and 326.9 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. Operating under the ...