Extra Space Storage (EXR) vs Iron Mountain (Delaware)Common Stock REIT (IRM)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 8, 2026.
Summary
Iron Mountain (Delaware)Common Stock REIT (IRM) has outperformed Extra Space Storage (EXR) over the past year, gaining 9.3% versus a loss of 7.8%. Over five years, IRM leads with a +157.9% price change compared with -28.0% for EXR. Iron Mountain (Delaware)Common Stock REIT is the larger company by market cap ($34.46 billion vs $29.07 billion), about 1.2 times the size.
On valuation, Extra Space Storage trades at a lower forward P/E (27.1x vs 42.4x for Iron Mountain (Delaware)Common Stock REIT). Extra Space Storage offers the higher dividend yield (4.92% vs 2.92%). Extra Space Storage converts more of its revenue into profit, with a net margin of 28.8% versus 2.2%.
Summary generated from market data by MetaCap's automated system. Methodology
Relative performance
Percent change in share price from the first common trading day shown; excludes dividends.
Head-to-head
| Metric | EXR | IRM |
|---|---|---|
| Share price | $131.70 | $115.75 |
| Market cap | $29.07B | $34.46B |
| 1-day change | -1.64% | -0.64% |
| YTD return | +1.14% | +39.54% |
| 1-year return | -7.82% | +9.31% |
| 5-year return | -28.02% | +157.91% |
| P/E ratio (TTM) | 29.07 | 82.68 |
| Forward P/E | 27.14 | 42.45 |
| EPS (TTM) | $4.53 | $1.40 |
| Dividend yield | 4.92% | 2.92% |
| Annual dividend | $6.48 | $3.38 |
| Revenue (latest FY) | $3.38B | $6.90B |
| Revenue growth (YoY) | +3.70% | +12.23% |
| Net income (latest FY) | $974.00M | $152.25M |
| Gross margin | 72.82% | 55.38% |
| Operating margin | 41.83% | 16.86% |
| Net margin | 28.84% | 2.21% |
| 52-week high | $158.88 | $134.68 |
| 52-week low | $125.71 | $77.77 |
| Distance from 52-week high | -17.11% | -14.06% |
| Analyst consensus | buy | buy |
| Avg. price target upside | +20.16% | +25.35% |
| Average volume | 1.26M | 1.73M |
| Shares outstanding | 211.27M | 297.70M |
| Employees | 8,393 | 29,400 |
| Sector | Real Estate | Real Estate |
| Industry | Real Estate Investment Trusts | Real Estate Investment Trusts |
Highlighted cells mark the higher value for growth, returns, margins and yield, and the lower value for P/E ratios. Highlighting is a mechanical comparison, not a recommendation.
Key differences
- IRM has outperformed EXR by 17.1 percentage points over the past year.
- Iron Mountain (Delaware)Common Stock REIT trades at a higher earnings multiple (82.7x vs 29.1x trailing P/E).
- Extra Space Storage offers a meaningfully higher dividend yield (4.92% vs 2.92%).
- Extra Space Storage is more profitable, keeping 28.8 cents of every revenue dollar as net income versus 2.2 cents for Iron Mountain (Delaware)Common Stock REIT.
- Iron Mountain (Delaware)Common Stock REIT grew revenue faster in its latest fiscal year (+12.23% vs +3.70%).
About Extra Space Storage
EXR stock →Extra Space Storage Inc., headquartered in Salt Lake City, Utah, is a self-administered and self-managed REIT and a member of the S&P 500. As of June 30, 2026, the Company owned and/or operated 4,410 self-storage stores in 42 states and Washington, D.C.
Real Estate · Real Estate Investment Trusts · 8,393 employees
About Iron Mountain (Delaware)Common Stock REIT
IRM stock →Iron Mountain Incorporated is trusted by more than 240,000 customers in 61 countries, including approximately 95% of the Fortune 1000, to help unlock value and intelligence from their assets through services that transcend the physical and digital worlds. Our broad range of solutions address their information management, digital transformation, information security, data center and asset lifecycle management needs.
Real Estate · Real Estate Investment Trusts · 29,400 employees
EXR vs IRM FAQ
Which is bigger, Extra Space Storage or Iron Mountain (Delaware)Common Stock REIT?
Iron Mountain (Delaware)Common Stock REIT (IRM) is larger, with a market capitalization of $34.46B compared with $29.07B for Extra Space Storage (EXR).
Which stock has performed better over the past year, EXR or IRM?
IRM returned +9.31% over the past 12 months, compared with -7.82% for EXR (price return, excluding dividends). Past performance does not predict future results.
Which has the lower P/E ratio, EXR or IRM?
EXR has the lower trailing P/E at 29.1, versus 82.7 for IRM. A lower P/E is not by itself a sign of a better investment; it can reflect slower expected growth or higher risk.
Which pays a higher dividend, Extra Space Storage or Iron Mountain (Delaware)Common Stock REIT?
Extra Space Storage has the higher yield at 4.92%, compared with 2.92% for Iron Mountain (Delaware)Common Stock REIT.
Are Extra Space Storage and Iron Mountain (Delaware)Common Stock REIT in the same industry?
Yes. Both are classified in the Real Estate Investment Trusts industry within the Real Estate sector.