Iron Mountain IRM
Real Estate · REIT - Specialty · Synthos Deep Dive · 2026-07-03
The Overview
Iron Mountain is the company that stores other companies' stuff — literally boxes of paper records in 1,450 warehouses, plus shredding, and now a fast-growing data-center business (the buildings that house the computers behind cloud and AI). About 95% of the Fortune 1000 pay them to keep records safe.
The good news: the newer, exciting parts (data centers, recycling old IT gear) are growing more than 50% a year, and management just raised its forecast. The catch: Iron Mountain borrows a lot to build all this — it owes roughly $19 billion, more than 8 years' worth of profit — and it pays out slightly more in dividends than it actually earns in spare cash. The stock isn't cheap either. So our verdict is Watch: a solid business with real momentum, but priced for good news with a shaky balance sheet, so we'd wait for a better price or a lighter debt load.
Here's what our three scores mean in everyday terms:
- Downside Risk 7/10 (elevated). Lots of debt, spends more cash than it takes in, and pays a dividend it doesn't fully cover from spare cash — if borrowing gets expensive or growth slows, it stings.
- Growth Quality 6/10 (decent). Growing at a healthy mid-teens pace, but most of the business is the slow, old paper-storage part.
- Exponential Potential 4/10 (low-to-moderate). The data-center arm could be a real second act, but it's still small next to the whole company, so don't expect the stock to multiply quickly.
The one big worry: the debt. Iron Mountain's whole strategy depends on cheap borrowing to keep building; if that gets harder, the plan gets harder.
Putting a number on it: our fair-value estimate is $122 against a current price of $117.40 — real upside if our numbers are right.
Our summary metrics
8.4× net-debt/EBITDA, negative book equity, negative FCF and a ~124% AFFO payout — the leverage is the risk.
13-14% AFFO/share growth with data-center + ALM up >50%, but the records core is low-single-digit.
Real data-center optionality (400 MW pipeline), but a $35B cap on a decelerating storage base caps the multibagger.
What does “fair value” mean?
Fair value is Synthos’s estimate of what one share is worth today, based on our model of the company’s future cash generation and the risks to it. It is not a price target or a prediction of where the stock trades next quarter — it’s the price where we think risk and reward are balanced. Above it, you’re paying for outcomes better than our base case; below it, the market is offering a margin of safety.
The model’s inputs and weightings are proprietary — they’re the product. What we publish is the output, plus an independent, public-math cross-check further down the page (“Check our number”) so you can judge it for yourself.
What do the 5 tiers mean? (Core · Tactical · Watch · Hold · Avoid)
Exponential Potential
Real data-center optionality (400 MW pipeline), but a $35B cap on a decelerating storage base caps the multibagger.
What could take this further than the base case — and where the market may be underpricing it. Full forward-growth and acceleration math in Deeper analysis, §4 below.
Deeper analysis
Technicals, fundamentals, valuation, and the full expert-claim evidence panel — the detail behind the numbers above.
Reference table
| Street consensus | $137.67 (high $143 / low $130; 13 Buy · 2 Hold · 5 Sell) — context, not our anchor |
| Valuation | ~20× FY26E AFFO/share ($5.82 mid-guidance) · EV/EBITDA 23× TTM · EV/Sales 7.5× · GAAP P/E ~129× (meaningless for a REIT) |
| Technicals | Mixed — $117, below 50-DMA ($126), above 200-DMA ($105), RSI 39 (weak), −12% off 52-wk high |
| Conviction | Low — zero net-bullish voices, 0 reconciled claims (no Synthos KB coverage); this is a quant/fundamental call |
| Position sizing | If owned, income-satellite ~1–3%; not a core holding at this leverage |
What the experts actually said
No independent expert claims in the Synthos knowledge base yet for IRM — this dive is fundamentals- and technicals-driven, not panel-driven.
Price & moving averages 12 months · 50 & 200-day averages · 52-week range
Solid line = price · dashed line = 50-day average · dotted line = 200-day average · the two thin horizontal lines mark the 52-week high and low. Price above both averages is an uptrend.
Data summary: last close $117.40, 5% below the 50-day average ($124), 8% above the 200-day average ($109) — a mixed trend. 12% below the 52-week high of $133, 49% above the 52-week low of $79.
Bollinger Bands 20-day average ± 2 standard deviations
The shaded band widens when the stock gets more volatile. Riding the upper edge = strong momentum (sometimes stretched); the lower edge = weak / potentially oversold.
Data summary: price $117.40 is currently at/below the lower band (potentially oversold) (band $117–$130).
RSI (14) momentum gauge · 0–100
Above 70 (overbought zone, shaded) = overbought, below 30 (oversold zone, shaded) = oversold. Currently 38.
MACD 12 / 26 / 9 · trend & momentum
The MACD line crossing above the signal line (bars flip to the up color) = momentum turning up; crossing below (bars flip to the down color) = turning down. Bar height = the size of that gap.
Data summary: MACD is currently below its signal line by 0.63, negative momentum.
Relative performance vs S&P 500 & its sector (XLRE (sector)), set to 100 a year ago
Solid = IRM · dashed = S&P 500 · dotted = XLRE (sector). A rising line means it is beating that benchmark — the sector line shows whether it is a leader or laggard within its own group.
Forward revenue & earnings actual → estimate · "FY" = fiscal year, "E" = estimate
Darker bars = actual results, brighter = analyst estimates. Taller bars to the right = expected growth.
Key stats an RIA wants
1. What it is
Iron Mountain (NYSE: IRM) is a ~75-year-old specialty REIT (real-estate investment trust) that began in 1951 storing paper records and has spent the last decade diversifying into higher-growth adjacencies. It operates ~1,450 facilities across ~50 countries, over 90 million square feet, and serves more than 240,000 customers including ~95% of the Fortune 1000. Fiscal year ends December 31. CEO: William L. Meaney.
The business today has two engines:
- The recurring records core — physical document storage, information governance, and secure destruction/shredding. Slow-growing (low single digits organically) but extraordinarily sticky and high-margin; customers rarely move their archives.
- The growth engines — data centers, digital transformation, and asset lifecycle management (ALM) (secure decommissioning and resale/recycling of used IT hardware). Management says these collectively grew >50% YoY in Q1'26.
Revenue mix (FY2025, FMP product segmentation):
- Global Records & Information Management: $5.29B (87%) — the legacy core.
- Global Data Center Business: $803M (12%), up from $620M in FY24 (+30% YoY) — the pivot's crown jewel. (FMP's product segmentation buckets ALM and digital inside the RIM line; management commentary — see §9 — breaks out the >50% growth cohort.)
Revenue by geography (FY2025, FMP): United States $4.57B (~66% of the geo-tagged base) · United Kingdom $473M · Canada $302M, with the remainder across ~50 countries. US-concentrated, like most of the peer set.
The strategic story is a re-rating bet: as data-center and ALM revenue mixes up, the market is asked to value IRM less like a paper-storage REIT and more like a digital-infrastructure compounder.
2. The expert thesis — no panel coverage (traceable)
There is no expert coverage of IRM in the Synthos knowledge base. total_claims = 0, zero net-bullish voices, zero cautionary voices. No claim_id exists to cite, and none is fabricated here.
That is itself an honest signal: IRM is not a name the high-skill voices Synthos tracks are talking about. This verdict is therefore entirely fundamentals- and quant-driven — built from FMP financials, analyst estimates, management's own SEC-filed guidance, and the technical block, with no conviction overlay. Readers should weight it accordingly: there is no independent expert panel corroborating (or contradicting) the call.
For external context only (not Synthos conviction, not reconciled to our KB): the sell-side is net-positive — 13 Buy, 2 Hold, 5 Sell, consensus "Buy," with a $137.67 price-target consensus. We treat that as one more data point, not as our anchor (§6).
3. Synthos scores & the Bull / Base / Bear cases
The one-glance judgment — three scores, 0–10, each anchored to real metrics (not probabilities we can't honestly calibrate):
| Score | 0–10 | The read |
|---|---|---|
| Downside Risk (lower = safer) | 7 · Elevated | Net-debt/EBITDA 8.4×, negative book equity (−$981M), negative FCF (−$932M FY25 on $2.3B growth capex), ~124% AFFO payout, beta 1.22. REIT leverage is normal; this much leaves no cushion. |
| Growth Quality | 6 · Decent | ~13–14% AFFO/share growth, Adjusted EBITDA margin ~36–37% and stable, data-center + ALM + digital +50% YoY — but ~85% of revenue is the low-single-digit records base and GAAP returns on capital are thin. |
| Exponential Potential | 4 · Low–Moderate | Real data-center optionality (400 MW energizing over 24 months, 32 MW already leased in 2026) — but it's ~12% of revenue against a slow core, and a $35B cap on a mature storage franchise limits the multibagger. |
The three cases (our own scenario model — assumptions shown; each target is a ~12–18-month fair value). We deliberately do not attach probabilities: the base case is by definition the expected path, so a weighted blend would just restate it with false precision. Because IRM is a REIT, we anchor on AFFO per share × a P/AFFO multiple, not GAAP EPS (GAAP earnings are depressed by heavy real-estate D&A and are not the economic earnings a REIT distributes).
| Case | Key assumptions | Fair value |
|---|---|---|
| Bull | Data-center leasing accelerates, ALM cross-sell compounds; FY27E AFFO/share beats to ~$6.60 and the market re-rates it toward a digital-infra ~24× on the mix shift. | ~$158 (+35%) |
| Base (our anchor) | Guidance roughly holds — FY26E AFFO/share $5.82 (mid), FY27E ~$6.55 at +13%; a leveraged specialty REIT with a good-but-not-clean balance sheet earns a ~19× P/AFFO. | ~$122 (+4%) |
| Bear | Rates stay higher-for-longer and the debt load bites; data-center leasing slips or records volumes erode faster; multiple de-rates to ~15× on ~$5.85 AFFO. | ~$88 (−25%) |
Synthos fair value = the base case, ~$122 (+4%), with the full $88–$158 span as the honest range. Our base sits below the Street's $137.67 consensus and even below its $130 low target — we give more weight to the leverage and the sub-1× fixed-charge headroom than the sell-side does. This is a tracked call — the Forecaster Scorecard grades it once it matures.
4. Exponential Potential
Synthos separates compounders (durable high returns on capital) from exponentials (accelerating multi-baggers-from-here). IRM is a re-rating story with a genuine but contained growth engine — not an exponential:
- Forward growth: revenue CAGR FY25→FY30E ~7.9% ($6.90B → ~$10.09B on 3-analyst consensus); AFFO/share growth ~13% FY26E per guidance. Respectable, not explosive.
- Acceleration (the 2nd derivative): total revenue growth is roughly steady-to-slightly-decelerating — +12.2% (FY25 reported) → ~14% (FY26E guidance mid) → then trending toward high-single-digits by FY28–30E on consensus. The mix is what's accelerating: data center +30% and the growth cohort +50%, but off a small base, so the blended top line stays mid-teens at best.
- Room to run: the data-center TAM is large and real (400 MW of capacity energizing over the next 24 months; 32 MW already leased in 2026 per management), and that is the legitimate next leg. But data centers are only ~12% of revenue; the other ~87% is a mature, low-growth records franchise. At $35B market cap on a slow core, the law of large numbers plus the mix math caps the multibagger.
- Reinvestment runway: heavy — $2.27B capex in FY25 (33% of revenue), which is why FCF is negative. The reinvestment is productive if the data-center leases fill, but it is debt-funded, which raises the stakes.
Exponential Potential: Low–Moderate (4/10). Own it, if at all, for a re-rating on mix shift plus a ~3% dividend — not for a fast multibagger. A pure-play data-center REIT at this growth with a clean balance sheet would score higher; IRM's slow core and leverage pull it down.
5. Financials (real numbers — FMP annual/quarterly)
- Revenue: FY25 $6.90B, +12.2% (FY24 $6.15B, +12.2% on FY23 $5.48B). Steady low-teens growth, accelerating vs the pre-pivot single digits.
- Quarterly trajectory: Q1'25 $1.59B → Q2 $1.71B → Q3 $1.75B → Q4 $1.84B → Q1'26 $1.94B (+21.6% YoY reported, +18.6% ex-FX per management). Sequentially strong.
- Margins: GAAP gross 55% TTM; Adjusted EBITDA margin ~36–37% (management), stable. GAAP net margin only 3.8% TTM — but for a REIT, D&A on the real-estate base makes GAAP net income a poor proxy for cash economics.
- AFFO (the REIT metric that matters): Q1'26 AFFO $426M, $1.43/share, +22% YoY. FY26 guidance (raised): AFFO $1.735–1.755B, $5.79–$5.86/share (~+13%). This — not GAAP EPS — is the number to track.
- GAAP EPS: FY25 $0.49 (Q1'26 $0.48). Optically a ~129× P/E; ignore it for a REIT — it's an artifact of depreciation, not a valuation signal.
- Cash flow: operating CF $1.34B FY25, capex −$2.27B (the data-center buildout), FCF −$932M — negative because growth capex exceeds operating cash. This is the crux: the growth is real but debt-funded.
- Balance sheet (the red flag): total debt $19.05B, net debt $18.9B, net-debt/EBITDA 8.4× TTM. Total stockholders' equity is negative (−$981M) — years of dividends above GAAP earnings have eroded book equity. Interest coverage is thin (~1.5× TTM). Current ratio 3.7× is fine for near-term liquidity, but the capital structure is stretched.
- Dividend: $0.864/quarter ($3.456 annualized), ~2.95% yield; TTM dividend payout ~124% of AFFO on the FMP ratio (management funds the gap partly with debt/growth capex offsets — a watch item, though data-center REITs commonly run high payouts while building).
6. Valuation — priced in or room?
On the metric that matters for a REIT, IRM trades at ~20× FY26E AFFO/share ($117 ÷ $5.82). That is a full multiple for a company ~87% levered to a low-growth records base — it already embeds credit for the data-center re-rating. On enterprise value: EV/EBITDA 23× TTM, EV/Sales 7.5×. GAAP P/E (~129×) is not meaningful here.
The bull case is that the mix shift earns a higher multiple: as data-center/ALM grow toward a larger share, the market values IRM more like digital infrastructure (mid-20s P/AFFO) than legacy storage. The bear case is that 8.4× leverage + negative equity + negative FCF + a ~124% payout deserve a discount, not a premium, and that higher-for-longer rates compress the multiple.
Street targets (context, not our anchor): consensus $137.67, high $143, low $130 (13 Buy · 2 Hold · 5 Sell). Our base FV of ~$122 sits below even the Street's low — we weight the balance-sheet risk more heavily. FMP's own quant letter grade is D+ (overall score 1/5), flagging DCF, ROE, debt/equity, and P/E as weak — consistent with our elevated Downside Risk score. Not a value buy; a fully-priced re-rating bet on a leveraged balance sheet.
7. Technicals (from the FMP tech block)
- Trend: mixed/rolling over. $117.16 sits below the 50-DMA ($125.76) but above the 200-DMA ($105.05) — the intermediate trend has weakened even as the longer-term uptrend holds. MACD −0.17 (mildly negative).
- Location: −12% off the 52-week high ($133.06), +49% off the 52-week low ($78.86). Max drawdown from peak ~12%. The stock fell −3.9% on the latest session.
- Momentum: RSI(14) 38.5 — weak, approaching (but not yet at) oversold (<30). No overbought risk; if anything, near-term momentum is soft.
- Relative strength: IRM +17.2% 12-mo vs SPY +20.6% and QQQ +30.3% — lagging both the market and the Nasdaq over 12 months, though it beat SPY over 3- and 6-month windows (+16% 3-mo, +41% 6-mo vs SPY +14%/+8%).
- Read: technicals do not confirm a fresh-breakout thesis — the stock is below its 50-DMA with soft RSI after a −3.9% day. Not a technical "buy now" setup; a patient entry would wait for the price to reclaim the 50-DMA or for RSI to reset from oversold nearer the 200-DMA (~$105).
8. Moat & competitive position
IRM's moat in the records core is genuine: switching costs are extreme (customers rarely relocate decades of archived documents), the business is contractual and recurring, and IRM is the scale leader with ~95% Fortune 1000 penetration. That core throws off durable, high-margin cash — it is the ballast.
The data-center and ALM businesses are more contested: data centers compete for capacity, power, and hyperscaler leases against far larger, better-capitalized specialists; ALM is a fragmented, lower-moat services market. IRM's edge there is its existing enterprise relationships and land/power footprint, not a structural monopoly. The secular threat to the core is the slow shift from paper to digital, which erodes new box volume over time — offset so far by pricing and the growth engines.
Peer set (FMP, market cap): the FMP peer list is a broad REIT basket rather than direct comps — Crown Castle $33B and SBA Communications $20B (towers), VICI Properties $29B (gaming), Extra Space Storage $32B (self-storage), AvalonBay $28B / Equity Residential $26B (apartments), Ventas $45B (healthcare), Lamar $16B (billboards), CoStar $12B, Weyerhaeuser $17B (timber). The most instructive comparisons are Extra Space (self-storage, similar "store other people's stuff" model) and pure-play data-center REITs (Equinix, Digital Realty — not in this list but the relevant valuation anchor for the growth arm). Against that frame, IRM is a hybrid: storage-REIT ballast + a data-center call option, carried on more leverage than most peers.
9. Management, capital allocation & guidance
- Capital allocation: aggressive, debt-funded growth. $2.27B capex (FY25) into data-center capacity while paying a ~3% dividend and running net-debt/EBITDA at 8.4×. This is a build-and-lever strategy: it works if the data-center leases fill at target yields and rates stay manageable; it is fragile if either breaks. Buybacks are negligible (appropriately — no free cash to spare).
- Insider activity: the most recent Form 4s (filed 2026-07-02, transactions 2026-07-01) show CEO William Meaney exercising options and selling the resulting shares (~38,474 sold across tranches at $121.81–$125.82) and an EVP selling 6,000 shares. This reads as routine option-exercise-and-sell / 10b5-1-style diversification, not a discretionary bearish signal — but it is net selling into strength, worth noting.
- Management's own guidance (SEC 8-K, half-weighted — they talk their book): IRM's Q1'26 earnings release (filed 2026-04-30) raised full-year 2026 guidance: Total Revenue $7.825–7.925B (~+14% at midpoint, up from $7.625–7.775B), Adjusted EBITDA $2.925–2.965B (~+14%), AFFO $1.735–1.755B, and AFFO/share $5.79–$5.86 (~+13%). Management cited "record performance," organic revenue growth of 17.2%, growth businesses +50% YoY, and 32 MW of data-center capacity already leased through April against a 400 MW energizing pipeline over 24 months. We treat this as management's self-interested framing, half-weighted — but the guidance raise is a real, dated, verifiable positive.
10. Catalysts & what to watch
- Next earnings: 2026-08-05 (Q2'26; Street EPS $0.54 GAAP, revenue ~$1.97B — but the line that matters is AFFO/share and the FY26 guidance progression). Prior 3 quarters beat on AFFO.
- Data-center leasing: MW leased vs the 400 MW pipeline — the single biggest swing factor for the re-rating bull case.
- Deleveraging trajectory: any move in net-debt/EBITDA below 8× and progress toward positive FCF as capex-heavy projects come online = confirmation the build is paying.
- Rates / refinancing: IRM's thesis is rate-sensitive; watch refinancing terms on the $19B debt stack and interest-coverage trend (~1.5×).
- Records volume & pricing: organic core growth holding vs paper-to-digital erosion.
Thesis tripwires (what would change the call): data-center leasing stalling; net-debt/EBITDA rising above ~9×; AFFO/share guidance cut; interest coverage slipping toward 1×; or an AFFO-uncovered dividend forcing a payout re-think.
11. Key risks
- Leverage (structural, the #1 risk): 8.4× net-debt/EBITDA, negative book equity (−$981M), ~1.5× interest coverage. This is the defining risk — the growth strategy is debt-funded, and the balance sheet has little cushion for a rate or leasing shock.
- Negative free cash flow: −$932M FY25; the dividend + capex exceed operating cash, plugged by new debt. Sustainable only while capital markets stay open on good terms.
- Dividend coverage: ~124% TTM AFFO payout on the FMP ratio — high even for a building REIT; a growth stumble pressures the payout.
- Valuation / de-rating: ~20× AFFO and price already through the Street's low target leave little margin for error; FMP's D+ quant grade echoes this.
- Secular erosion of the core: paper-to-digital reduces new records volume over time; the growth engines must keep outrunning it.
- No expert corroboration: zero Synthos KB coverage — no independent high-skill panel is validating (or challenging) the operating story, so conviction is structurally low.
12. Verdict, position sizing & monitoring
Watch. Iron Mountain is a real operating-momentum story — data-center + ALM + digital growing >50%, AFFO/share up ~22% in Q1'26, management raising FY26 guidance — wrapped around a mature, sticky records core. The problem is the price and the balance sheet: at ~20× AFFO with 8.4× leverage, negative equity, negative free cash flow, and a ~124% payout, the stock is priced for the good news to keep coming, and it trades below even the Street's low target on our numbers. That is a balanced risk/reward, not a margin-of-safety buy — hence Watch, not Buy.
- Sizing: if owned, treat as an income-satellite, ~1–3% for the ~3% yield and the data-center optionality — not a core holding at this leverage. Wait for a cheaper multiple, a deleveraging inflection, or a reclaim of the 50-DMA (~$126) before upgrading.
- Monitoring: re-underwrite on the tripwires in §10; formal re-score each earnings print, with special attention to AFFO/share, net-debt/EBITDA, and data-center leasing. This verdict is logged as a tracked Synthos call as of 2026-07-03 at $117.16.
- Single biggest risk: balance-sheet leverage — the entire strategy rests on cheap, available debt.
Provenance & disclosures
- Traceability: 0 KB claims, breadth 0 — IRM has no expert coverage in the Synthos knowledge base, so this note is explicitly fundamentals- and quant-driven. No
claim_idis cited because none exists; fabricated conviction is structurally impossible (claim-ID reconciliation). - Data as-of: fundamentals 2026-03-31 (Q1'26) · estimates & prices 2026-07-02/03 · management guidance from the SEC 8-K filed 2026-04-30. Forward figures are analyst consensus (FMP) or management guidance, labeled as estimates.
- REIT metric note: valuation is anchored on AFFO/share (the REIT cash-earnings standard), not GAAP EPS, which is distorted by real-estate depreciation.
- Management caveat: IRM's guidance is management's own book, half-weighted by design.
- Not investment advice. Independent research, educational and informational only, never personalized. Hypothetical/forward figures are labeled; the only performance numbers Synthos will headline are the live, real-money Flagship's.
- Version: 2026-07-03. Prior versions available via the deep-dive version dropdown ("based on the info at the time").