Extra Space Storage (EXR +0.15%) is the largest player in the U.S. self-storage sector. In mid-2026, it had over 4,340 properties in 42 states, with more than 335.6 million square feet of rentable space. It controlled 14.2% of the U.S. self-storage market, the largest share in the sector (bigger than Public Storage's 11.1%, which will increase to 14.1% upon closing its acquisition of National Storage Affiliates).
Extra Space Storage's third-party management platform sets it apart from other self-storage REITs. While most REIT rivals also manage third-party properties, Extra Space Storage was an early leader in this business model. It currently manages more properties than any of its competitors (1,856 in early 2026, compared to 813 for CubeSmart and 362 for Public Storage).
This strategy has several benefits. It generates steady management fee income (over $220 million annually) and requires little up-front investment. Meanwhile, it provides the company with a steady stream of acquisition opportunities (more than $2 billion since 2020). Extra Space Storage can purchase a property it knows very well when the owner sells, reducing risk.
Extra Space's fast-growing third-party management platform has enabled it to deliver sector-leading dividend growth. Over the last 20 years, Extra Space has grown its payout at a 10.3% compound annual rate, faster than Public Storage (7.8%) and CubeSmart (3%).