Iron Mountain (IRM) has kicked off its latest reporting cycle with Q1 2026 framed against a year where trailing twelve month revenue reached about US$6.9b and basic EPS came in at US$0.49, giving investors a clear view of how headline results are feeding through to the bottom line. Over recent quarters the company has seen revenue move from US$1,581.3m in Q4 2024 to US$1,843.2m in Q4 2025, while quarterly basic EPS has ranged from US$0.35 to US$0.30 across the same period. This sets the context for how current performance is feeding through to earnings power. With net profit margin over the last year at 2.1% and affected by a large one off loss, the focus now is firmly on how sustainably Iron Mountain is converting its revenue base into durable margins.

See our full analysis for Iron Mountain.

With the headline results on the table, the next step is to set these numbers against the widely followed narratives around Iron Mountain's growth, risks, and earnings quality to see which storylines hold up and which ones get pushed back.

FFO holds up better than EPS swings

• Across the last six quarters, Funds From Operations moved between US$62.1 million and US$209.5 million, with FFO per share ranging from US$0.21 to US$0.71, while basic EPS shifted between a loss of US$0.15 and a profit of US$0.35.
• What bullish investors highlight is that REIT cash metrics look steadier than accounting earnings, and this mixed pattern in FFO and EPS:
  • Supports the bullish focus on cash generation, as trailing twelve month FFO reached US$584.2 million compared with trailing net income of US$144.6 million.
  • At the same time, the periods with EPS losses and low FFO, such as Q2 2025, show why bulls need reported earnings quality to improve, not just headline growth in newer businesses.

Over the last year of choppy earnings, bulls argue that the core cash engine is more resilient than the headline EPS line suggests. They also note that this matters for a long term growth story built around data centers and digital platforms. 🐂 Iron Mountain Bull Case

Margins and a US$240.1m one off hit

• Net profit margin over the last twelve months sits at 2.1%, down from 2.9% a year earlier, with a US$240.1 million one off loss weighing on those reported results.
• Critics arguing the bearish case point to these thin margins and the one off charge, and the data here:
  • Lines up with concerns that reported profitability is fragile, as trailing EPS of US$0.49 and net income of US$144.6 million leave limited room to comfortably cover interest and a 2.74% dividend yield.
  • Also shows why bears focus on earnings quality, since the large adjustment and drop in margin make the path to higher, cleaner net income an open question rather than a given.

With margins sitting in the low single digits and a large adjustment still in the rear view mirror, skeptics see plenty of room for earnings volatility to remain part of the story. 🐻 Iron Mountain Bear Case

Attractive P/S tags along with balance sheet strain

• The shares trade on a P/S of 5.4x versus peer and industry averages of 6.3x and 7.7x. The current price of US$125.99 sits below a DCF fair value of about US$159.85, while shareholders' equity is negative and interest and dividend coverage are flagged as weak.
• Analysts' consensus narrative sees a mix of growth and balance sheet pressure, and this combination of valuation and financial structure:
  • Supports the idea that investors are paying less for each dollar of the roughly US$6.9b in trailing revenue compared with sector peers, which lines up with the view that there could be upside if growth and margins track forecasts.
  • Also speaks to why some remain cautious, as negative equity and coverage concerns mean the lower P/S and gap to DCF fair value come with trade offs around financial resilience.

Next Steps

To see how these results tie into long-term growth, risks, and valuation, check out the full range of community narratives for Iron Mountain on Simply Wall St. Add the company to your watchlist or portfolio so you'll be alerted when the story evolves.

With both risks and rewards in play, the real question is how you weigh them for your own portfolio. Act while the details are fresh and review the full breakdown of Iron Mountain's 3 key rewards and 4 important warning signs through the 3 key rewards and 4 important warning signs

See What Else Is Out There

Thin net margins, a large one off loss, negative equity and flagged interest and dividend coverage all point to meaningful balance sheet strain at Iron Mountain.

If those pressure points make you want sturdier finances in your portfolio, start comparing companies in the solid balance sheet and fundamentals stocks screener (45 results) today while this earnings story is fresh in your mind.

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.