IRM monthly performance report
View IRM's monthly returns, drawdown, and seasonality trends — updated every month.
IRM monthly report
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Key takeaways
- Iron Mountain (IRM) closed September 2026 at $114.34, down 0.88% for the month and +15.59% over the trailing 12 months.
- Year-to-date, IRM is +37.84%, outperforming the S&P 500 which has returned +11.70% YTD.
- The stock is trading +3.84% versus its 200-day moving average ($110.11), a bullish technical signal.
- Over the past three years, IRM has outperformed the S&P 500 by +9.60%, with a relative strength index reading of 105.6.
- Win rate over the trailing 39 months stands at 53.8% — 21 positive months versus 18 negative months.
Iron Mountain ended September 2026 at $114.34, posting a monthly return of −0.88%. The S&P 500 returned −0.70% over the same window, leaving relative performance at −0.18%.
The current quarter stands at −9.48% (Q3 2026 (QTD)), while medium-term trend remains constructive: price is +3.84% versus the 200-day moving average ($110.11).
Year-to-date, IRM is +37.84% against SPY +11.70%, a gap of +26.14%. The stock is currently −15.10% below its 52-week high, with maximum 3-year drawdown at −39.96%.
| Period | IRM | S&P 500 (SPY) | Excess return |
|---|---|---|---|
| 1 Day | +0.30% | −0.12% | +0.42% |
| 1 Week | −0.73% | −0.34% | −0.39% |
| 1 Month | −0.88% | −0.70% | −0.18% |
| 3 Months | −10.82% | +2.80% | −13.62% |
| 6 Months | +7.02% | +13.85% | −6.83% |
| YTD | +37.84% | +11.70% | +26.14% |
| 12 Months | +15.59% | +15.01% | +0.57% |
| 3 Years | +81.29% | +71.69% | +9.60% |
| Rank | Month | Return |
|---|---|---|
| #1 | Apr 2026 | +23.35% |
| #2 | Feb 2026 | +17.58% |
| #3 | Feb 2024 | +16.47% |
| #4 | Jul 2024 | +14.44% |
| #5 | Jun 2024 | +11.07% |
| Rank | Month | Return |
|---|---|---|
| #1 | Nov 2025 | −16.12% |
| #2 | Dec 2024 | −15.01% |
| #3 | Feb 2025 | −8.27% |
| #4 | Mar 2025 | −7.65% |
| #5 | Sep 2023 | −6.44% |
| Quarter | Return |
|---|---|
| Q2 2025 | +19.21% |
| Q3 2025 | −0.61% |
| Q4 2025 | −18.63% |
| Q1 2026 | +23.13% |
| Q2 2026 | +23.66% |
| Q3 2026 (QTD) | −9.48% |
| Year | Return |
|---|---|
| 2023 | +40.38% |
| 2024 | +50.20% |
| 2025 | −21.08% |
| 2026 | +37.84% |
| Metric | Value |
|---|---|
| 52-Week High | $134.68 (2026-06-24) |
| 52-Week Low | $77.77 (2025-12-18) |
| Current Price | $114.34 |
| 200-Day Moving Average | $110.11 |
| Price vs 200DMA | +3.84% |
| 3-Year Maximum Drawdown | −39.96% (2025-04-08) |
| Current Drawdown from 52W High | −15.10% |
| RS metric | Value |
|---|---|
| RS Index (3-year, rebased to 100) | 105.6 |
| 3-Year Excess Return vs S&P 500 | +9.60% |
| RS Peak | 155.2 (Oct 2024) |
| RS Trough | 82 (Dec 2025) |
| Status | Outperforming Benchmark |
Frequently asked questions
What was IRM's return for this report period?
IRM returned −0.88% in the latest monthly window ending 2026-09-18.
Has IRM outperformed SPY year to date?
YTD IRM: +37.84% vs SPY: +11.70%.
What is IRM's 12-month return?
+15.59% over the trailing 12 months.
Is IRM above or below its 200-day moving average?
Price is +3.84% versus 200DMA ($110.11).
What is the maximum drawdown in the 3-year window?
−39.96% on 2025-04-08.