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NYSE · IRMReal EstateREITs

Iron Mountain Inc. (IRM)

$118.66+1.69%
Close Nov 4, 2026 · split-adjusted
Nov 4, 2026$117.41▲ 13.64% in range
Nov 4, 2025Low $78.86 · High $133.06Nov 4, 2026
What changed · written from our data
As of Nov 4, 2026

Iron Mountain closed at $118.66 on Nov 4, up 1.69%, 10.8% below its 52-week closing high. Volume of 2.5M shares was 1.97× its 20-day average (above normal).

Split-adjusted performance: +1.9% over one month, -10.1% over six months, +14.5% over one year.

In the quarter ended Jun 30, 2026, revenue was $2.03B, up 18.5% from a year earlier, with a net margin of 5.0%.

Short interest was 7.1M shares at the Oct 15 settlement, up 2.1% from the prior report (2.4% of float, 5.1 days to cover).

Market cap$35.33B297.7M shares
Revenue · quarter$2.03B+18.5% YoY
Diluted EPS$0.34—
P/E · TTM84.4×P/S 4.7×
Net margin5.0%Gross 52.8%
Dividend yield2.91%$0.864 last paid
52-week range78.86 – 133.06−10.8% from high
Volume2.5M1.97× 20-day avg
Volatility · 60d28.6%Annualised
Short % of float2.4%5.1 days to cover
Net cash-$17.14BCash $204.8M
Next earnings—Not scheduled
Split-adjusted performance
1W +2.6%1M +1.9%3M −2.7%6M −10.1%YTD +43.0%1Y +14.5%3Y +103.6%5Y +159.9%

Earnings reactions

History →

No reported quarters with price history yet.

Rank within REITs

Percentile among 179 companies (100 = best)

6-month momentum39
Revenue growth86
Net margin39
Value (low P/E)12
Size94

Industry medians: 6-month return −6.1%, revenue growth +4.1%, net margin 10.7%, P/E 25.2×.

Short interest

Details →
Shares short7.1M+2.1% vs prior
Days to cover5.1Settled Oct 15
% of float2.4%
Short vol. 10d57.4%of daily volume

Closest peers by size in REITs

CompanyPriceToday6MRev. growthNet marginP/EMkt cap
IRMIron Mountain$118.66+1.69%−10.1%+18.5%5.0%84.4$35.33B
EXRExtra Space Storage$161.04+3.08%+11.9%+3.6%27.8%32.4$33.61BCompare
CCICrown Castle$92.17+6.46%+2.1%−4.9%9.3%45.5$39.21BCompare
VICIVICI Properties$25.25+3.40%−11.9%+5.8%32.1%11.8$27.80BCompare
VTRVentas$89.20+2.48%+3.0%+22.9%3.6%180.0$47.17BCompare
VMRKVivmark Residential$63.72+2.71%————$49.31BCompare
ORealty Income$59.22+2.99%−7.5%+6.6%24.1%44.2$56.04BCompare
SBACSBA Communications$195.48+5.84%−10.5%+2.3%27.8%20.9$20.74BCompare
PSAPublic Storage$342.76+2.81%+10.9%+11.6%22.9%37.8$64.04BCompare

News about Iron Mountain

All news →
Should Iron Mountain Stock Be in Your Portfolio Ahead of Q3 Earnings?Zacks Investment Research · 2d ago▲ PositiveIron Mountain Projects Double-Digit Growth in 2026Investing.com · Feb 12, 2026▲ Positive

Quick answers

What does Iron Mountain do?
Iron Mountain Inc is an information management services provider organized and operated as a real estate investment trust. The company offers solutions to its clients to address their information management, digital transformation, information security, data center, and asset lifecycle management (ALM) needs.
What is IRM's market cap?
$35.33B, based on the Nov 4 close of $118.66.
What is IRM's P/E ratio?
84.4× trailing-twelve-month earnings of $418.65M.
Does Iron Mountain pay a dividend?
Yes. The latest regular dividend was $0.864 per share (ex-date Sep 15), an annualised yield of 2.91%.
How much of IRM is sold short?
7.1M shares, 2.4% of float, as of Oct 15, 2026.
What sector is IRM in?
Real Estate, in the REITs industry.

About Iron Mountain

Iron Mountain Inc is an information management services provider organized and operated as a real estate investment trust. The company offers solutions to its clients to address their information management, digital transformation, information security, data center, and asset lifecycle management (ALM) needs. Its customers come from various industries, including commercial, legal, financial, healthcare, technology, etc. The company has two reportable segments: Global Records and Information Management (Global RIM) and Global Data Center. Maximum revenue is generated from the Global RIM segment, which offers data and records management, secure shredding, consumer storage, and other related services. Geographically, the company generates maximum revenue from the United States.

HQ: Portsmouth, NH29,400 employeesListed Feb 1, 1996ironmountain.com

Sources: Massive / Polygon daily aggregates (split-adjusted) · SEC filings via Massive · FINRA settlements via Massive · Financial Modeling Prep. Figures are dated where shown; research is informational, not investment advice. Methodology