Fundamentals · 2026-09-09S&P 500ANNUAL BASIS

Iron Mountain

IRM stock analysis · Real Estate · Other Specialized REITs

FY 2025-12-31ANNUAL FILINGS
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These are research estimates based on annual filings. Valuation uses a cash-flow proxy and explicit assumptions; prices are not live. Published valuations use annual periods first filed by the price date, with later restatements retained.
Reference share price · USD
$126.31HISTORICAL SNAPSHOT

As of · fund-implied per-share value

Fund holding value ÷ shares held. Not a live quote; not adjusted for later stock splits.

View SEC fund filing ↗
Estimated issuer market cap
$37.6B

Price × SEC outstanding shares. Shares measured 2026-06-30. Approximate; share and price dates can differ.

View share-count filing ↗
Valuation

DCF value

Generic cash-flow and operating-capital models are not suitable for this sector; specialist bank/insurance or REIT analysis is required.

Generic cash-flow and operating-capital models are not suitable for this sector; specialist bank/insurance or REIT analysis is required.

How this is calculated ↗
Valuation

Reverse DCF

Generic cash-flow and operating-capital models are not suitable for this sector; specialist bank/insurance or REIT analysis is required.

Generic cash-flow and operating-capital models are not suitable for this sector; specialist bank/insurance or REIT analysis is required.

How this is calculated ↗
Valuation

Relative valuation

-86.5%

26 sector peers · median 35.0×

How this is calculated ↗
Valuation

Historical multiples

44.2×

7 annual observations · snapshot P/E 260.0× · 487.7% versus history

How this is calculated ↗
Valuation

Free cash flow yield

Generic cash-flow and operating-capital models are not suitable for this sector; specialist bank/insurance or REIT analysis is required.

Generic cash-flow and operating-capital models are not suitable for this sector; specialist bank/insurance or REIT analysis is required.

How this is calculated ↗
Quality

ROIC / quality

Generic cash-flow and operating-capital models are not suitable for this sector; specialist bank/insurance or REIT analysis is required.

Generic cash-flow and operating-capital models are not suitable for this sector; specialist bank/insurance or REIT analysis is required.

How this is calculated ↗
Valuation

Value composite

Requires three valuation yields and at least five covered sector peers.

Requires three valuation yields and at least five covered sector peers.

How this is calculated ↗
Momentum

12–1 price momentum

Split and corporate-action verification is incomplete for these fund observations. Verified adjusted endpoints are required for 12–1 momentum.

Split and corporate-action verification is incomplete for these fund observations. Verified adjusted endpoints are required for 12–1 momentum.

How this is calculated ↗
Investment

Asset growth

12.9%

Annual basis · read assumptions below

How this is calculated ↗
Investment

Net payout yield

Requires reported dividends, repurchases and issuance; missing values are not zero.

Requires reported dividends, repurchases and issuance; missing values are not zero.

How this is calculated ↗
Quality

Accrual quality

Generic cash-flow and operating-capital models are not suitable for this sector; specialist bank/insurance or REIT analysis is required.

Generic cash-flow and operating-capital models are not suitable for this sector; specialist bank/insurance or REIT analysis is required.

How this is calculated ↗
Momentum

Fundamental momentum

4.2%

Annual basis · read assumptions below

How this is calculated ↗

Follow the cash

ANNUAL · USD

Operating cash flow and reinvestment over time

USD · bar maximum 2.3B2020-12-31: cfo $987,657,000.002020-12-31: capex $438,263,000.0020202021-12-31: cfo $758,902,000.002021-12-31: capex $611,082,000.0020212022-12-31: cfo $927,695,000.002022-12-31: capex $875,378,000.0020222023-12-31: cfo $1,113,567,000.002023-12-31: capex $1,339,223,000.0020232024-12-31: cfo $1,196,708,000.002024-12-31: capex $1,791,564,000.0020242025-12-31: cfo $1,339,999,000.002025-12-31: capex $2,271,628,000.002025
Operating cash flowCapital expenditure

Annual USD. Negative bars use a compressed lower scale. Hover or inspect the financial history table for exact values.

Make the assumptions yours

Personal inputs stay in this browser. Blank fields retain published inputs. Five-year forecast; zero net borrowing. Required return must exceed terminal growth.

How sensitive is the valuation?

DCF per-share sensitivity · includes reviewed preferred and minority-owner claims · rows: required return · columns: growth
Return / Growth3.0%5.0%7.0%
8.0%
10.0%
12.0%

Annual financial history

Open SEC filings ↗
Fiscal year-endRevenueNet incomeOperating cash flowCapital expenditureAssets
2025-12-316.9B152.3M1.3B2.3B21.1B
2024-12-316.1B183.7M1.2B1.8B18.7B
2023-12-315.5B187.3M1.1B1.3B17.5B
2022-12-315.1B562.1M927.7M875.4M16.1B
2021-12-314.5B452.7M758.9M611.1M14.5B
2020-12-314.1B343.1M987.7M438.3M14.1B
2019-12-311.6B268.3M966.7M693M13.8B
2018-12-311.6B355.1M935.5M460.1M11.9B

USD, abbreviated. Restated annual history; not a point-in-time backtest. Missing values appear as dashes.

Trace the inputs

MODEL ANNUAL PERIOD
InputValueSEC tag / sourceFiled
revenue6.9BRevenueFromContractWithCustomerExcludingAssessedTax2026-02-12
netIncome152.3MProfitLoss
Explicit consolidated amount, including the portion attributable to noncontrolling interests.
2026-02-12
Parent/common earnings proxy144.6MNetIncomeLossAvailableToCommonStockholdersBasic2026-02-12
cfo1.3BNetCashProvidedByUsedInOperatingActivities2026-02-12
capex2.3BPaymentsToAcquirePropertyPlantAndEquipment2026-02-12
operatingIncome1.2BOperatingIncomeLoss2026-02-12
assets21.1BAssets2026-02-12
equity-709.3MStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Explicit consolidated amount, including the portion attributable to noncontrolling interests.
2026-02-12
Parent book equity proxy-981MStockholdersEquity2026-02-12
debt16.4BLongTermDebt2026-02-12
shortDebtNot reported under a supported tag
cash158.5MCashAndCashEquivalentsAtCarryingValue2026-02-12
shares297.8MWeightedAverageNumberOfDilutedSharesOutstanding2026-02-12
dividends919.4MPaymentsOfDividendsCommonStock2026-02-12
buybacksNot reported under a supported tag
issuanceNot reported under a supported tag