Iron Mountain Inc (IRM) stock
Close on Nov 11, 2026Market cap $33.47BP/E 73.5Yield 2.86%
Iron Mountain Inc grew revenue 17.5% to $7.80B over the twelve months to Sep 30, 2026. Operating income rose 37.6% to $1.52B, moving the operating margin from 16.6% to 19.5%. Free cash flow was -$536.82M. At the latest close the market valued the company at $33.47B, 73.5 times its earnings.
Key statistics
Valuation at the latest close; fundamentals over the trailing twelve months, balances at Sep 30, 2026
Valuation
- Market cap
- $33.47B
- P/E ratio
- 73.5
- Price to sales
- 4.29
- Price to book
- –
- Dividend yield
- 2.86%
- Free cash flow yield
- -1.60%
Fundamentals
- Revenue
- $7.80B
- EPS, diluted
- $1.53
- Free cash flow
- -$536.82M
- Book value per share
- -$4.63
- Diluted shares
- 300M
Trading
- Next earnings
- Feb 11, 2027 (estimated, before the open)
- Previous close
- $110.78
- Open
- $113.57
- Day's range
- $111.79 – $114.11
- Volume
- 1,319,408
- Average volume (20 days)
- 1,615,044
- Index membership
- S&P 500, Russell 1000, Russell 3000
- Beta (5 years)
- 1.05
- 52-week range
- $77.77 – $134.68
- RSI (14 days)
- 48.8
- Volatility (1 year)
- 34.9%
- Relative volume
- 0.78×
- WACC
- 8.0%
Index membership is inferred from the holdings of funds that track each index (VOO, IVV, SPYM, IWB, IWV), as reported to the SEC for Jun 30, 2026. Join dates come from quarterly fund reports since 2019, so they are accurate to the quarter.
Market cap history
Month-end market cap since 2009, using shares outstanding reported at the time
Total return vs. the S&P 500
Price change plus reinvested dividends, to the close on Nov 11, 2026. The S&P 500 is measured by the SPY fund.
| Period | IRM | S&P 500 | Difference | IRM per year | S&P 500 per year |
|---|---|---|---|---|---|
| 1 month | -1.8% | -2.4% | +0.6 pts | ||
| 3 months | -7.4% | -1.2% | −6.3 pts | ||
| Year to date | +38.6% | +12.3% | +26.4 pts | ||
| 1 year | +14.9% | +12.4% | +2.4 pts | ||
| 3 years | +108.2% | +78.8% | +29.4 pts | +27.7% | +21.4% |
| 5 years | +183.8% | +75.2% | +108.7 pts | +23.2% | +11.9% |
| 10 years | +512.6% | +311.1% | +201.5 pts | +19.9% | +15.2% |
Fifteen years at a glance
Fiscal years 2011 to 2025 and trailing twelve months, USD
Revenue
Gross profit
Operating income
EPS, diluted
Free cash flow
Press releases
Releases Iron Mountain filed with the SEC as exhibits to Form 8-K or 6-K
- Results
- Results
- Results
- Results
- Results
- Results
About Iron Mountain
Real Estate Investment Trusts
Iron Mountain Incorporated provides comprehensive information management, digital transformation, information security, data center, and asset lifecycle management services. The company organizes its business into Global Records and Information Management, Global Data Center, and Corporate and Other segments. Its primary offerings include physical records management, data management for backup computer media, digital solutions via workflow tools and smart document processing, secure shredding, media archiving, consumer storage, and fine arts handling. Additionally, it offers enterprise-class and hyperscale data center operations alongside asset lifecycle management services encompassing data sanitization, decommissioning, refurbishment, and IT recycling. Iron Mountain serves enterprise clients across diverse market verticals—including commercial, legal, healthcare, financial, technology, insurance, energy, and life sciences—as well as hyperscale operators and government entities.
Company profile, executives and historyIron Mountain stock: common questions
What is Iron Mountain's stock price?
IRM closed at $112.43 on Nov 11, 2026, up 1.49% on the day. Over the past 52 weeks it traded between $77.77 and $134.68.
What is Iron Mountain's market cap?
Iron Mountain was worth $33.47B at the close on Nov 11, 2026: the share price times the diluted shares outstanding.
What is IRM's P/E ratio?
IRM trades at 73.5 times earnings, based on diluted earnings per share of $1.53 over the twelve months to Sep 30, 2026.
How much revenue does Iron Mountain make?
Iron Mountain reported revenue of $7.80B for the twelve months to Sep 30, 2026, up 17.5% from a year earlier.
Does Iron Mountain pay a dividend?
Yes. Iron Mountain paid $3.22 per share over the last twelve months, a yield of 2.86% at the latest price, and has raised its annual dividend 3 years in a row.
When does Iron Mountain report earnings next?
Iron Mountain is expected to report Q4 FY2026 results on Feb 11, 2027, before the open. The date is estimated from its past reporting pattern until the company confirms it.
How has IRM stock performed over the past year?
Including dividends, IRM returned +14.9% over the past year, against +12.4% for the S&P 500.
How many IRM shares are sold short?
7M shares were sold short at the latest FINRA report, 2.39% of the float, or 5.6 days of average trading volume.
Who are Iron Mountain's competitors?
Companies most similar to Iron Mountain by business, industry and size include EQIX, DLR, PSA, PLD, AMT.
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