Iron Mountain (IRM) returns
Iron Mountain returns over 10 years
$1,000 invested in Iron Mountain ten years ago was worth $6,079 at the close on October 30, 2026, with dividends reinvested: an average return of 19.8% a year. The same $1,000 in the S&P 500 (SPY) became $4,166.
Total return by period
| Period | Total return | A year, on average | $1,000 became | S&P 500 (SPY) |
|---|---|---|---|---|
| 1 month | +5.0% | — | $1,050 | -0.9% |
| 3 months | -5.8% | — | $942.30 | +2.1% |
| Year to date | +43.7% | — | $1,437 | +11.7% |
| 1 year | +18.9% | — | $1,189 | +12.4% |
| 3 years | +119.8% | +30.0% | $2,198 | +88.5% |
| 5 years | +208.3% | +25.3% | $3,083 | +76.0% |
| 10 years | +507.9% | +19.8% | $6,079 | +316.6% |
Iron Mountain return by calendar year
| Year | IRM | S&P 500 (SPY) | Difference |
|---|---|---|---|
| 2026 to date | +43.7% | +11.7% | +32.0% |
| 2025 | -18.3% | +17.7% | -36.0% |
| 2024 | +54.5% | +24.9% | +29.6% |
| 2023 | +46.4% | +26.2% | +20.2% |
| 2022 | -0.0% | -18.2% | +18.1% |
| 2021 | +87.8% | +28.7% | +59.0% |
| 2020 | +0.7% | +18.4% | -17.7% |
| 2019 | +5.9% | +31.2% | -25.3% |
| 2018 | -8.0% | -4.6% | -3.5% |
| 2017 | +23.5% | +21.7% | +1.8% |
| 2016 | +27.4% | +12.0% | +15.4% |
Past returns do not predict future returns. Returns are computed from our daily closes, adjusted for splits and with dividends reinvested on their ex-dates; taxes and trading costs are left out.
See also: IRM financials · IRM valuation
No forecast, no recommendation. This page describes Iron Mountain from published data; it is not advice to buy, sell or hold any security.
Figures as of the close on Oct 30, 2026 unless a row says otherwise. Prices are split adjusted; returns include dividends reinvested. Data may be delayed. See the disclaimer and how TrendArc works.