Iron Mountain (IRM) Historical Monthly & Quarterly Returns
Dividend-adjusted returns by month and quarter. Compare performance across years.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +11.1% | +17.6% | 4.9% | +12.1% | — | — | — | — | — | — | — | — |
| 2025 | 3.4% | 8.3% | 6.8% | +4.2% | +10.1% | +4.7% | 5.1% | 5.2% | +11.3% | +1.0% | 16.1% | 2.9% |
| 2024 | 3.5% | +16.5% | +2.8% | 3.3% | +4.1% | +11.9% | +14.4% | +10.4% | +5.6% | +4.1% | 0.0% | 14.5% |
| 2023 | +9.5% | 3.3% | +1.5% | +4.4% | 3.3% | +7.6% | +8.1% | +3.5% | 5.5% | 0.6% | +8.6% | +10.1% |
| 2022 | 12.2% | +7.1% | +14.1% | 3.0% | +0.3% | 8.5% | 0.4% | +8.5% | 15.5% | +13.9% | +8.5% | 7.2% |
| 2021 | +14.2% | +3.3% | +8.2% | +8.4% | +8.5% | 1.5% | +3.4% | +9.1% | 7.8% | +5.0% | 0.4% | +16.6% |
| 2020 | 0.8% | 3.8% | 19.9% | +1.6% | +6.6% | +3.6% | +8.0% | +6.8% | 9.1% | 2.7% | +5.5% | +9.5% |
| 2019 | +14.8% | 4.8% | +1.9% | 8.4% | 5.7% | +4.1% | 6.0% | +8.3% | +3.5% | +1.3% | 2.1% | +1.1% |
| 2018 | 7.1% | 10.2% | +6.3% | +3.3% | 1.9% | +7.0% | +0.3% | +2.8% | 2.8% | 11.3% | +11.0% | 2.9% |
| 2017 | +10.3% | +1.5% | 0.3% | 2.6% | +0.5% | +0.0% | +6.0% | +8.2% | +0.0% | +2.8% | +2.2% | 6.3% |
| 2016 | +2.0% | +6.7% | +17.4% | +7.7% | +0.6% | +9.9% | +3.5% | 6.8% | 1.1% | 10.1% | 2.2% | +0.0% |
| 2015 | +3.0% | 7.7% | +0.5% | 5.4% | +5.8% | 13.7% | 3.1% | 5.7% | +11.3% | 1.2% | 7.7% | 2.8% |
| 2014 | 12.9% | +3.0% | +2.2% | +3.2% | +9.5% | +14.8% | 5.5% | +7.3% | 8.1% | +10.4% | +6.1% | +3.0% |
| 2013 | +10.1% | +0.9% | +5.9% | +4.3% | 5.4% | 25.0% | +4.4% | 7.1% | +5.6% | 1.8% | +5.9% | +8.8% |
| 2012 | +0.1% | +0.8% | 6.5% | +5.5% | 6.6% | +17.1% | 2.2% | +1.9% | +4.7% | +12.7% | 8.6% | 1.0% |
| 2011 | 2.5% | +6.6% | +20.9% | +2.0% | +6.7% | +1.0% | 7.2% | +2.8% | 2.1% | 2.2% | 1.8% | +2.2% |
| 2010 | +0.4% | +13.2% | +6.1% | 8.3% | 2.5% | 8.1% | +5.4% | 14.3% | +10.5% | 2.5% | +2.0% | +13.3% |
| 2009 | 17.2% | 9.3% | +19.4% | +28.5% | 4.4% | +5.5% | +1.6% | +0.3% | 9.0% | 8.4% | 1.7% | 5.2% |
| 2008 | 7.1% | 12.5% | 12.1% | +3.9% | +9.3% | 11.6% | +9.3% | 0.3% | 15.5% | 0.6% | 10.4% | +13.8% |
| 2007 | +1.5% | 0.5% | 6.1% | +7.6% | 2.2% | 5.0% | +2.5% | +5.6% | +7.8% | +13.9% | +5.1% | +1.5% |
| 2006 | 1.3% | +4.8% | 6.8% | 3.9% | 5.5% | +1.2% | +9.6% | +0.0% | +4.8% | +0.9% | 0.6% | 4.1% |
| 2005 | 7.6% | 4.0% | +6.6% | +2.9% | 3.3% | +8.2% | +10.5% | +0.5% | +6.5% | +6.3% | +5.7% | +2.4% |
| 2004 | +5.3% | +7.8% | 0.5% | +2.0% | 2.7% | +8.9% | +0.3% | 4.5% | +9.8% | 2.4% | 8.8% | +1.2% |
| 2003 | 4.0% | +11.1% | +8.7% | +4.2% | 0.8% | 6.2% | 1.2% | +1.0% | 3.0% | +6.6% | 3.9% | +7.5% |
| 2002 | +9.6% | 0.2% | 0.7% | 2.9% | +0.5% | 0.4% | 3.7% | 6.5% | 10.1% | +12.9% | +17.3% | 0.3% |
| 2001 | +0.2% | +4.9% | 1.7% | 5.8% | +13.9% | +9.0% | 2.6% | 2.3% | 2.9% | 5.8% | +10.7% | +1.3% |
| 2000 | 15.9% | 7.7% | +11.6% | +2.9% | +4.2% | 7.0% | +3.1% | 2.6% | +8.4% | 8.7% | 1.9% | +11.9% |
| 1999 | 2.1% | 0.7% | +0.4% | +1.1% | 1.4% | 0.4% | +3.3% | 16.3% | +11.4% | +23.6% | +8.9% | +35.0% |
| 1998 | +20.5% | +3.3% | 0.5% | +13.9% | 9.9% | 10.4% | +3.5% | +5.6% | +23.9% | +14.2% | +2.3% | +3.7% |
| 1997 | 6.6% | 0.9% | 11.9% | 4.9% | +18.8% | +7.7% | 11.6% | +1.0% | 0.5% | +3.0% | 12.6% | 16.1% |
| 1996 | — | 1.7% | 4.2% | +10.5% | +11.1% | +12.1% | +10.8% | +4.6% | +21.4% | +1.8% | +1.8% | 0.9% |
| Avg | +0.3% | +1.1% | +1.7% | +2.8% | +1.8% | +1.2% | +2.0% | +0.6% | +1.8% | +2.5% | +0.8% | +2.6% |
| Median | 0.4% | +0.8% | +0.5% | +2.9% | +0.4% | +2.4% | +2.8% | +1.0% | +1.8% | +1.1% | +0.9% | +1.3% |
| Win % | 50% | 52% | 55% | 68% | 53% | 57% | 63% | 60% | 53% | 57% | 50% | 57% |
2026
Jan+11.1%
Feb+17.6%
Mar4.9%
Apr+12.1%
May—
Jun—
Jul—
Aug—
Sep—
Oct—
Nov—
Dec—
2025
Jan3.4%
Feb8.3%
Mar6.8%
Apr+4.2%
May+10.1%
Jun+4.7%
Jul5.1%
Aug5.2%
Sep+11.3%
Oct+1.0%
Nov16.1%
Dec2.9%
2024
Jan3.5%
Feb+16.5%
Mar+2.8%
Apr3.3%
May+4.1%
Jun+11.9%
Jul+14.4%
Aug+10.4%
Sep+5.6%
Oct+4.1%
Nov0.0%
Dec14.5%
2023
Jan+9.5%
Feb3.3%
Mar+1.5%
Apr+4.4%
May3.3%
Jun+7.6%
Jul+8.1%
Aug+3.5%
Sep5.5%
Oct0.6%
Nov+8.6%
Dec+10.1%
2022
Jan12.2%
Feb+7.1%
Mar+14.1%
Apr3.0%
May+0.3%
Jun8.5%
Jul0.4%
Aug+8.5%
Sep15.5%
Oct+13.9%
Nov+8.5%
Dec7.2%
2021
Jan+14.2%
Feb+3.3%
Mar+8.2%
Apr+8.4%
May+8.5%
Jun1.5%
Jul+3.4%
Aug+9.1%
Sep7.8%
Oct+5.0%
Nov0.4%
Dec+16.6%
2020
Jan0.8%
Feb3.8%
Mar19.9%
Apr+1.6%
May+6.6%
Jun+3.6%
Jul+8.0%
Aug+6.8%
Sep9.1%
Oct2.7%
Nov+5.5%
Dec+9.5%
2019
Jan+14.8%
Feb4.8%
Mar+1.9%
Apr8.4%
May5.7%
Jun+4.1%
Jul6.0%
Aug+8.3%
Sep+3.5%
Oct+1.3%
Nov2.1%
Dec+1.1%
2018
Jan7.1%
Feb10.2%
Mar+6.3%
Apr+3.3%
May1.9%
Jun+7.0%
Jul+0.3%
Aug+2.8%
Sep2.8%
Oct11.3%
Nov+11.0%
Dec2.9%
2017
Jan+10.3%
Feb+1.5%
Mar0.3%
Apr2.6%
May+0.5%
Jun+0.0%
Jul+6.0%
Aug+8.2%
Sep+0.0%
Oct+2.8%
Nov+2.2%
Dec6.3%
2016
Jan+2.0%
Feb+6.7%
Mar+17.4%
Apr+7.7%
May+0.6%
Jun+9.9%
Jul+3.5%
Aug6.8%
Sep1.1%
Oct10.1%
Nov2.2%
Dec+0.0%
2015
Jan+3.0%
Feb7.7%
Mar+0.5%
Apr5.4%
May+5.8%
Jun13.7%
Jul3.1%
Aug5.7%
Sep+11.3%
Oct1.2%
Nov7.7%
Dec2.8%
2014
Jan12.9%
Feb+3.0%
Mar+2.2%
Apr+3.2%
May+9.5%
Jun+14.8%
Jul5.5%
Aug+7.3%
Sep8.1%
Oct+10.4%
Nov+6.1%
Dec+3.0%
2013
Jan+10.1%
Feb+0.9%
Mar+5.9%
Apr+4.3%
May5.4%
Jun25.0%
Jul+4.4%
Aug7.1%
Sep+5.6%
Oct1.8%
Nov+5.9%
Dec+8.8%
2012
Jan+0.1%
Feb+0.8%
Mar6.5%
Apr+5.5%
May6.6%
Jun+17.1%
Jul2.2%
Aug+1.9%
Sep+4.7%
Oct+12.7%
Nov8.6%
Dec1.0%
2011
Jan2.5%
Feb+6.6%
Mar+20.9%
Apr+2.0%
May+6.7%
Jun+1.0%
Jul7.2%
Aug+2.8%
Sep2.1%
Oct2.2%
Nov1.8%
Dec+2.2%
2010
Jan+0.4%
Feb+13.2%
Mar+6.1%
Apr8.3%
May2.5%
Jun8.1%
Jul+5.4%
Aug14.3%
Sep+10.5%
Oct2.5%
Nov+2.0%
Dec+13.3%
2009
Jan17.2%
Feb9.3%
Mar+19.4%
Apr+28.5%
May4.4%
Jun+5.5%
Jul+1.6%
Aug+0.3%
Sep9.0%
Oct8.4%
Nov1.7%
Dec5.2%
2008
Jan7.1%
Feb12.5%
Mar12.1%
Apr+3.9%
May+9.3%
Jun11.6%
Jul+9.3%
Aug0.3%
Sep15.5%
Oct0.6%
Nov10.4%
Dec+13.8%
2007
Jan+1.5%
Feb0.5%
Mar6.1%
Apr+7.6%
May2.2%
Jun5.0%
Jul+2.5%
Aug+5.6%
Sep+7.8%
Oct+13.9%
Nov+5.1%
Dec+1.5%
2006
Jan1.3%
Feb+4.8%
Mar6.8%
Apr3.9%
May5.5%
Jun+1.2%
Jul+9.6%
Aug+0.0%
Sep+4.8%
Oct+0.9%
Nov0.6%
Dec4.1%
2005
Jan7.6%
Feb4.0%
Mar+6.6%
Apr+2.9%
May3.3%
Jun+8.2%
Jul+10.5%
Aug+0.5%
Sep+6.5%
Oct+6.3%
Nov+5.7%
Dec+2.4%
2004
Jan+5.3%
Feb+7.8%
Mar0.5%
Apr+2.0%
May2.7%
Jun+8.9%
Jul+0.3%
Aug4.5%
Sep+9.8%
Oct2.4%
Nov8.8%
Dec+1.2%
2003
Jan4.0%
Feb+11.1%
Mar+8.7%
Apr+4.2%
May0.8%
Jun6.2%
Jul1.2%
Aug+1.0%
Sep3.0%
Oct+6.6%
Nov3.9%
Dec+7.5%
2002
Jan+9.6%
Feb0.2%
Mar0.7%
Apr2.9%
May+0.5%
Jun0.4%
Jul3.7%
Aug6.5%
Sep10.1%
Oct+12.9%
Nov+17.3%
Dec0.3%
2001
Jan+0.2%
Feb+4.9%
Mar1.7%
Apr5.8%
May+13.9%
Jun+9.0%
Jul2.6%
Aug2.3%
Sep2.9%
Oct5.8%
Nov+10.7%
Dec+1.3%
2000
Jan15.9%
Feb7.7%
Mar+11.6%
Apr+2.9%
May+4.2%
Jun7.0%
Jul+3.1%
Aug2.6%
Sep+8.4%
Oct8.7%
Nov1.9%
Dec+11.9%
1999
Jan2.1%
Feb0.7%
Mar+0.4%
Apr+1.1%
May1.4%
Jun0.4%
Jul+3.3%
Aug16.3%
Sep+11.4%
Oct+23.6%
Nov+8.9%
Dec+35.0%
1998
Jan+20.5%
Feb+3.3%
Mar0.5%
Apr+13.9%
May9.9%
Jun10.4%
Jul+3.5%
Aug+5.6%
Sep+23.9%
Oct+14.2%
Nov+2.3%
Dec+3.7%
1997
Jan6.6%
Feb0.9%
Mar11.9%
Apr4.9%
May+18.8%
Jun+7.7%
Jul11.6%
Aug+1.0%
Sep0.5%
Oct+3.0%
Nov12.6%
Dec16.1%
1996
Jan—
Feb1.7%
Mar4.2%
Apr+10.5%
May+11.1%
Jun+12.1%
Jul+10.8%
Aug+4.6%
Sep+21.4%
Oct+1.8%
Nov+1.8%
Dec0.9%
Avg
Jan+0.3%
Feb+1.1%
Mar+1.7%
Apr+2.8%
May+1.8%
Jun+1.2%
Jul+2.0%
Aug+0.6%
Sep+1.8%
Oct+2.5%
Nov+0.8%
Dec+2.6%
Median
Jan0.4%
Feb+0.8%
Mar+0.5%
Apr+2.9%
May+0.4%
Jun+2.4%
Jul+2.8%
Aug+1.0%
Sep+1.8%
Oct+1.1%
Nov+0.9%
Dec+1.3%
Win %
Jan50%
Feb52%
Mar55%
Apr68%
May53%
Jun57%
Jul63%
Aug60%
Sep53%
Oct57%
Nov50%
Dec57%
Frequently asked questions
What is the best performing month for Iron Mountain (IRM) stock?
- Historically, April is the best performing month for Iron Mountain (IRM) stock with an average return of +2.76%.
What is the worst performing month for Iron Mountain (IRM) stock?
- Historically, January is the worst performing month for Iron Mountain (IRM) stock with an average return of +0.27%.
What is the best performing quarter for Iron Mountain (IRM) stock?
- Historically, Q4 is the best performing quarter for Iron Mountain (IRM) stock with an average return of +6.51%.
What is the worst performing quarter for Iron Mountain (IRM) stock?
- Historically, Q1 is the worst performing quarter for Iron Mountain (IRM) stock with an average return of +3.13%.
What is the best performing year for Iron Mountain (IRM) stock?
- Historically, 2021 is the best performing year for Iron Mountain (IRM) stock with a return of +87.72%.
What is the worst performing year for Iron Mountain (IRM) stock?
- Historically, 1997 is the worst performing year for Iron Mountain (IRM) stock with a return of 33.48%.
Which month has the highest win rate for Iron Mountain (IRM) stock?
- Historically, April has the highest win rate for Iron Mountain (IRM) stock — positive in 68% of years.
Which month has the lowest win rate for Iron Mountain (IRM) stock?
- Historically, January has the lowest win rate for Iron Mountain (IRM) stock — positive in 50% of years.
Which quarter has the highest win rate for Iron Mountain (IRM) stock?
- Historically, Q4 has the highest win rate for Iron Mountain (IRM) stock — positive in 63% of years.
Which quarter has the lowest win rate for Iron Mountain (IRM) stock?
- Historically, Q1 has the lowest win rate for Iron Mountain (IRM) stock — positive in 52% of years.
Data & methodology
How are returns calculated?
- We compare the closing price at the end of each period (month or quarter) with the closing price at the end of the previous period. The return is the percentage change. All prices are adjusted for dividends and stock splits. Based on historical prices from our data provider.
What is average vs median?
- Average is the arithmetic mean of returns for each period across years. Median is the middle value. Both exclude empty cells. Use median to reduce impact of outliers.
What does the heatmap show?
- Green cells indicate positive returns, red cells indicate negative returns. The darker the color, the stronger the move. Average and Median rows summarize each column across years.
What is Win %?
- Percentage of years when the period had a positive return. For example, 80% for January means January was positive in 80% of the years in the selected range.
Explore more
IRM Overview
Company profile, financial tools, and key metrics
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IRM Revenue Counter
Earns $218.85 every second. See per minute, hour, and day.
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IRM Earnings Counter
Earns $4.58 per second net profit. See per minute, hour, and day.
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IRM Economic Scale
Exceeds French Polynesia's GDP. Compare with world economies.
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IRM What If Invested
What if you had invested $1,000? See historical returns from any date.
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IRM How It Makes Money
Discover visual breakdown of $6.90B in revenue — where it comes from and where it goes.
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IRM Price Target Scenarios
Model bear, base, and bull cases with EPS growth and exit P/E — pre-filled from analysts and history.
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IRM Daily Price Character
Balanced · 49.0% historical win rate (green days). Streaks & record days.
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IRM Buybacks
Recent repurchase activity. Shareholder yield & SBC comparison.
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IRM Stock Split History
6 splits on record. Dates, ratios, and cumulative multiple.
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IRM Dividend Profile
Yield: 2.88%. Safety: 1/8. See full history.
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IRM Dividend Calculator
How much dividend income would $1,000 have earned? Calculate from any date.
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IRM Dividend Forecast
Project future income with DRIP, growth assumptions, and optional monthly contributions.
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IRM Financials
Revenue, EPS, EBITDA, market cap, debt and balance sheet history with annual and quarterly data.
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