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 Extra Space brand, the company is the largest self-storage operator in the United States, offering secure and conveniently located storage solutions for individuals and businesses.
