IRM (Iron Mountain) PB Ratio: (As of Jun. 30, 2026)


IRM Iron Mountain Inc IRM
85 GF Score
Price $126.31
GF Value $107.52
Valuation Modestly Overvalued
! 10 Warning Signs
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What is Iron Mountain PB Ratio?

The PB Ratio, or Price-to-Book ratio, or Price/Book, is a financial ratio used to compare a company's market price to its Book Value per Share. As of today (2026-06-30), Iron Mountain's share price is $126.31. Iron Mountain's Book Value per Share for the quarter that ended in Mar. 2026 was $-4.08. Hence, Iron Mountain's PB Ratio of today is .

The historical rank and industry rank for Iron Mountain's PB Ratio or its related term are showing as below:

During the past 13 years, Iron Mountain's highest PB Ratio was 1422.54. The lowest was 3.81. And the median was 7.36.

IRM's PB Ratio is not ranked *
in the REITs industry.
Industry Median: 0.87
* Ranked among companies with meaningful PB Ratio only.

During the past 13 years, the highest 3-Year average Book Value Per Share Growth Rate of Iron Mountain was 72.00% per year. The lowest was -43.20% per year. And the median was 3.30% per year.

Back to Basics: PB Ratio


Iron Mountain  (NYSE:IRM) PB Ratio Explanation

Unlike valuation ratios relative to the earning power such as PE Ratio, PE Ratio without NRI, PS Ratio, Price-to-Operating-Cash-Flow , or Price-to-Free-Cash-Flow, the PB Ratio measures the valuation of the stock relative to the underlying asset of the company.

The PB Ratio works the best for the businesses that earn most of their profit from their assets, e.g. banks and insurance companies.


Be Aware

Some businesses have very light assets, such as software companies or insurance agencies. The PB Ratio does not work well for these companies. Some companies even have negative equity, so the PB Ratio cannot be applied to them.


Iron Mountain PB Ratio Related Terms


Iron Mountain PB Ratio Historical Data

* Premium members only.

The historical data trend for Iron Mountain's PB Ratio can be seen below:

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

Iron Mountain PB Ratio Chart

Iron Mountain Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
PB Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only 17.71 22.77 96.66 0.00 0.00

Iron Mountain Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
PB Ratio Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 0.00 0.00 0.00 0.00 0.00

IRM vs CCI, SBAC, WY: PB Ratio Comparison

For the REIT - Specialty subindustry, Iron Mountain's PB Ratio, along with its competitors' market caps and PB Ratio data, can be viewed below:

* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.


Iron Mountain PB Ratio vs REITs Industry

For the REITs industry and Real Estate sector, Iron Mountain's PB Ratio distribution charts can be found below:

* The bar in red indicates where Iron Mountain's PB Ratio falls into.


IRM
85GF Score
Iron Mountain Inc IRM
PB Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
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Iron Mountain PB Ratio Calculation

The PB Ratio, or Price-to-Book ratio, or Price/Book, is a financial ratio used to compare a company's market price to its Book Value per Share. It is a ratio widely used to value stocks.

Iron Mountain's PB Ratio for today is calculated as follows:

PB Ratio=Share Price/Book Value per Share (Q: Mar. 2026)
=126.31/-4.084
=

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

It can also be calculated from the numbers for the whole company:

A closely related ratio is called Price-to-Tangible-Book. The difference between Price-to-Tangible-Book and PB Ratio is that book value other than intangibles are used in the calculation.

Is Iron Mountain (IRM) Overvalued in 2026?

Based on GuruFocus' analysis, Iron Mountain stock appears to be overvalued. The current stock price of $126.31 is trading 17.5% above its estimated GF Value™ of $107.52. GuruFocus considers Iron Mountain to be Modestly Overvalued.

Key valuation signals for IRM:

  • PB Ratio:
  • GF Value™: $107.52 vs. price of $126.31 (17.5% above fair value)
  • GF Score™: 85/100 with 10 warning signs

No single metric tells the full story. See the IRM stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Iron Mountain Business Description

Industry Real EstateREITs
Address 85 New Hampshire Avenue, Suite 150, Portsmouth, NH, USA, 03801
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.
85GF Score

Get the complete analysis for IRM

PB Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

$126.31
Price
$107.52
GF Value