- If you have been wondering whether Iron Mountain's share price really matches what the business is worth, this article will walk through how its current valuation stacks up.
- The stock last closed at US$106.84, with returns of 1.6% over 7 days, 6.6% over 30 days, 28.4% year to date and 27.8% over 1 year. That performance may have caught your eye if you track steady compounders.
- Recent coverage has focused on Iron Mountain's role in data center and storage services, as investors weigh how its traditional records business sits alongside digital infrastructure themes. This broader narrative helps frame whether the recent share price strength lines up with how the market is currently thinking about the company.
- On our valuation checks, Iron Mountain scores 5 out of 6. We will walk through what that means using common valuation methods, then finish with a more complete way to think about the stock's value that goes beyond a single score.
Approach 1: Iron Mountain Discounted Cash Flow (DCF) Analysis
A Discounted Cash Flow model estimates what a business could be worth by projecting its future adjusted funds from operations and free cash flows, then discounting those back to today in dollar terms.
For Iron Mountain, the model uses a 2 stage Free Cash Flow to Equity approach based on Adjusted Funds From Operations. The latest twelve month free cash flow is US$1.54b. Analyst and extrapolated projections used by Simply Wall St have this rising to US$2.49b by 2030, with a series of annual forecasts between 2026 and 2035 that are discounted back to reflect risk and the time value of money.
When all those discounted cash flows are added together, the DCF model arrives at an estimated intrinsic value of US$159.01 per share. Against the recent share price of US$106.84, this implies a 32.8% discount, which points to the shares trading below this particular estimate of value.
Result: UNDERVALUED
Our Discounted Cash Flow (DCF) analysis suggests Iron Mountain is undervalued by 32.8%. Track this in your watchlist or portfolio, or discover 48 more high quality undervalued stocks.
Approach 2: Iron Mountain Price vs Sales
For companies that are already generating meaningful revenue, the P/S ratio is a straightforward way to see what investors are paying for each dollar of sales, especially when earnings can be affected by non cash items or one off factors.
In simple terms, higher growth expectations and lower perceived risk usually justify a higher “normal” P/S ratio, while lower growth or higher risk often support a lower multiple. It therefore helps to compare Iron Mountain’s P/S with relevant benchmarks, then consider what looks reasonable given its profile.
Iron Mountain currently trades on a P/S of 4.58x. The Specialized REITs industry average sits at 7.15x, while the peer group used here averages 6.15x. Simply Wall St’s Fair Ratio for Iron Mountain is 5.63x. This is a proprietary estimate of what its P/S might be, given factors such as earnings growth, industry, profit margin, market cap and key risks.
This Fair Ratio can be more useful than a simple peer or industry comparison because it adjusts for company specific characteristics rather than assuming all businesses deserve the same multiple. Comparing 4.58x to the 5.63x Fair Ratio suggests Iron Mountain’s shares are currently priced below this model based estimate of a “fair” P/S.
Result: UNDERVALUED
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Upgrade Your Decision Making: Choose your Iron Mountain Narrative
Earlier we mentioned that there is an even better way to understand valuation. On Simply Wall St’s Community page you can use Narratives to turn your view of Iron Mountain into a clear story that links its business profile to a forecast and a fair value. You can then compare that fair value with the current price to decide whether you see it as attractive or expensive, and see how other investors frame the same company. For example, one Narrative sees Iron Mountain as a legacy data manager with optionality in digital infrastructure and assigns a fair value of US$160.00. Another focuses on sector headwinds and execution risks and arrives at a fair value around US$71.53. There are also more upbeat Narratives that anchor on a fair value of US$119.73 or US$140.00. All of these update as new earnings and news are reflected in the underlying estimates.
For Iron Mountain, however, we'll make it really easy for you with previews of two leading Iron Mountain Narratives:
First is a bullish view that leans into the idea of Iron Mountain as a durable information infrastructure platform with meaningful upside if its digital and data center plans play out.
Fair value in this Narrative: US$160.00 per share
Implied discount to this fair value versus the last close of US$106.84: around 33%
Revenue growth used in this Narrative is very large, reflecting an aggressive long run assumption relative to the current base.
- Sees Iron Mountain as a global information management REIT with deep roots in regulated industries like healthcare, financial services and government, where compliance and data security needs create high switching costs and long contracts.
- Frames the business as a hybrid of mature physical storage that throws off cash and faster growing digital solutions and data centers, with the mix supporting recurring revenue and cross selling potential.
- Views the company as moving toward a broader information infrastructure role, where successful expansion in digital and colocation could provide new, meaningful revenue pillars over time.
On the other side is a bearish Narrative that accepts Iron Mountain's scale and recurring revenue but questions how much investors should pay if sector headwinds and execution risks bite.
Fair value in this Narrative: about US$71.53 per share
Implied downside to this fair value versus the last close of US$106.84: around 33% overvaluation on this view
Revenue growth used in this Narrative: 6.29%
- Flags the risk that accelerating cloud adoption and digital transformation reduce demand for legacy physical storage while competition in data centers and digital services squeezes margins.
- Highlights that building out data centers and meeting higher sustainability standards requires heavy investment, which can pressure free cash flow, increase leverage and limit flexibility on dividends and pricing.
- Ties these assumptions into a fair value of about US$71.53, anchored to a more cautious analyst cohort that sees the current P/E and premium multiple as hard to justify if sector and funding conditions stay challenging.
Both Narratives use the same company and share price, but arrive at very different fair values and growth assumptions. Your job is to decide which story, or mix of stories, feels closer to how you see Iron Mountain's records, digital and data center businesses playing out over time.
If you want to go beyond these previews and see how other investors connect their forecasts to a price, you can review the full range of Narratives, compare the fair values being used and decide where your own estimate sits in that spread.
Do you think there's more to the story for Iron Mountain? Head over to our Community to see what others are saying!
This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.
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