Iron Mountain Incorporated (IRM) vs Simon Property Group, Inc. (SPG)
SPG leads on 10 of 13 compared metrics.
A side-by-side comparison of Iron Mountain Incorporated and Simon Property Group, Inc. across valuation, profitability, dividends, and growth — built entirely from reported fundamentals, as of July 20, 2026. The ● marks the stronger figure on each row (cheaper multiple, higher margin/return).
IRM
Iron Mountain Incorporated
$124.23Real EstateDelayed quote: Jul 20, 2026, 4:00 PM EDT
SPG
Simon Property Group, Inc.
$228.19Real EstateDelayed quote: Jul 20, 2026, 4:00 PM EDT
Total return — IRM vs SPG
growth of $100 · dividends reinvested · last 30yIRM +4050.0%SPG +4277.9%SPG compounded faster
IRM SPG
IRM vs SPG: by the numbers
- •SPG is the larger company ($74.00B vs $36.96B market cap).
- •SPG trades at the lower earnings multiple (15.90 vs 136.07 P/E).
- •SPG converts more revenue to profit (70.40% vs 3.76% net margin).
- •IRM grew revenue faster over the past five years (11.73% vs 8.15% CAGR).
- •SPG pays the higher dividend yield (3.86% vs 2.73%).
Which is better, IRM or SPG?
Metric tally: IRM 3 · SPG 10It depends on what you're optimizing for:
ValueSPG(lower P/E)
GrowthIRM(faster 5Y revenue CAGR)
IncomeSPG(higher dividend yield)
QualitySPG(higher ROIC)
Metrics side by side
Valuation
| Metric | IRM | SPG |
|---|---|---|
| P/E ratio | 136.07 | 15.90● |
| Forward P/E | 52.17 | 34.05● |
| P/S ratio | 5.11● | 11.12 |
| P/B ratio | — | 15.22 |
| PEG ratio | — | 0.14 |
| EV / EBITDA | 24.22 | 21.35● |
Profitability
| Metric | IRM | SPG |
|---|---|---|
| Gross margin | 25.69% | 85.24%● |
| Operating margin | 18.01% | 48.28%● |
| Net margin | 3.76% | 70.40%● |
| ROE | -14.74% | 96.34%● |
| ROIC | 5.72% | 9.60%● |
Dividends
| Metric | IRM | SPG |
|---|---|---|
| Dividend yield | 2.73% | 3.86%● |
| Payout ratio | 689.18% | 62.23% |
Growth (annualized)
| Metric | IRM | SPG |
|---|---|---|
| Revenue CAGR (5Y) | 11.73%● | 8.15% |
| EPS CAGR (5Y) | -16.26% | 31.55%● |
| Total return CAGR (5Y) | 28.03%● | 18.85% |
Frequently asked
- Which is better, IRM or SPG?
- It depends on your goal. value: SPG (lower P/E); growth: IRM (faster 5Y revenue CAGR); income: SPG (higher dividend yield); quality: SPG (higher ROIC). Across all compared metrics, SPG leads 10 to 3.
- Is IRM or SPG cheaper?
- On trailing earnings, SPG is cheaper: IRM trades at a 136.07 P/E and SPG at 15.90.
- Which has grown faster, IRM or SPG?
- Over the past five years, IRM grew revenue faster — IRM at a 11.73% CAGR versus SPG at 8.15%.
- Does IRM or SPG pay a bigger dividend?
- IRM yields 2.73% and SPG yields 3.86% based on trailing dividends and the latest price.
- Is IRM or SPG more profitable?
- SPG runs the higher net margin — IRM at 3.76% versus SPG at 70.40%.
- Which has been the better investment, IRM or SPG?
- Over the past 10-year, IRM delivered the higher annualized total return — IRM at 18.17% versus SPG at 5.53%. Past performance doesn't predict future results.
Go deeper
Dig into the metrics
Iron Mountain P/E ratioSimon Property P/E ratioIron Mountain dividend yieldSimon Property dividend yieldIron Mountain ROESimon Property ROEIron Mountain operating marginSimon Property operating marginIron Mountain revenue growthSimon Property revenue growthIron Mountain free cash flowSimon Property free cash flow
Iron Mountain & Simon Property appear in these rankings
Figures are sourced from reported fundamentals and the latest end-of-day price. This comparison is informational only and is not investment advice. Past performance does not predict future results. See our methodology. Compiled by TGMCharts Research · data verified July 20, 2026.