Finvest
IRM Specialty REITs · Data centers · Records storage · REIT · Thesis updated July 19, 2026

Old boxes are funding AI growth

01 Running thesis

Growth looks real, price is harder

Iron Mountain used to be a simple records storage story. Companies paid it to hold boxes of paper, tapes, and files in secure warehouses. That business still matters because it brings in steady rent-like revenue and has high switching costs.

The bigger story now is growth. In Q1 2026, total revenue grew 21.6% to $1.94 billion, and organic growth was 17.2%. Data Center revenue grew 47.1%, while the Corporate and Other segment, which includes ALM, grew 69.7%. Management also said Data Center leasing should finish meaningfully above its 100 megawatt target.

The key bear worry this period was margin pressure in Data Centers. The filing showed a 30 basis point margin decline there, but management said power is passed through to customers. After adjusting for that, underlying Data Center margin expanded 120 basis points year over year.

The catch is price and balance sheet risk. Net lease adjusted leverage improved to 4.8x, the best level since 2014 in the internal view, but total debt is still large. The stock also already prices in a lot of the growth story, so strong execution may not be enough if investors demand a cheaper entry point.

Apr 2026▲Q1 2026 eased a major bear concern. Data Center margin pressure was explained as power cost pass-through, while ALM guidance rose by $100 million to $950 million.
Apr 2026▲The Q1 2026 filing showed total revenue growth of 21.6%, organic growth of 17.2%, and leverage improving to 4.8x. Data Center and ALM both grew much faster than the company average.
Feb 2026▲The 2025 Form 10-K showed 10.2% organic revenue growth and 15.1% Adjusted EBITDA growth. Data Center margin expanded sharply for the year, and leverage fell to 4.9x.
Nov 2025▲Q3 2025 reinforced the growth story with record revenue and Adjusted EBITDA. A 10% dividend increase signaled management confidence in future cash flow.
Aug 2025▲Q2 2025 showed faster revenue and EBITDA growth, led by Data Center and ALM. Leverage stayed at 5.0x, so the balance sheet risk did not go away.
May 2025▲Q1 2025 confirmed the early growth pivot. Revenue rose 7.8%, Adjusted EBITDA rose 11.8%, and Data Center revenue grew 20.3%.
02 Business model

Boxes pay for servers

Iron Mountain makes money in two main ways: storage rental and services. Storage rental includes physical records and data center space. Services include shredding, scanning, workflow tools, and asset lifecycle work.

The core Global RIM business is the anchor. Customers store sensitive records with Iron Mountain and do not move them often. That makes the revenue sticky and gives the company room to raise prices over time.

Cash from RIM helps fund faster growth areas. Data Centers need large upfront spending, including planned 2026 capital expenditures of about $2.2 billion. ALM is less about buildings and more about safely collecting, wiping, recycling, and reselling used IT hardware.

This model breaks if growth spending gets ahead of signed demand. Management says it avoids speculative data center builds, but the test is whether pre-leasing keeps pace with the expanded pipeline.

03 Product portfolio

What Iron Mountain sells

Cash cow

Global Records and Information Management

This is the old records business. It stores physical documents, manages records, and handles secure destruction.

Growth engine

Data Center

Iron Mountain leases data center space to enterprises and hyperscalers. Demand is tied to cloud, AI, and the need for power-backed computing capacity.

Growth engine

Asset Lifecycle Management

ALM helps customers dispose of old servers and devices safely. Iron Mountain can harvest parts, recycle equipment, and resell components into supply chains.

Option

Digital Solutions

This unit scans documents and helps customers manage digital workflows. A FedRAMP high authorization for InSight has opened more government opportunities.

04 Business segments

Q1 2026 revenue mix

Global RIM Business73%modest
Global Data Center Business13%growing fast
Corporate and Other14%growing fast

The mix uses Q1 2026 segment revenue from the Form 10-Q. Corporate and Other includes ALM, so the ALM growth story is partly hidden inside that segment.

05 Risk factors

What could go wrong

Debt stays heavy

High impact · Medium odds

Leverage improved to 4.8x, but Iron Mountain still carries large absolute debt. Higher rates or weaker cash flow could make refinancing and growth spending more costly.

We watchNet total lease adjusted leverage, fixed charge coverage, and interest expense each quarter.

Data center buildout outruns demand

High impact · Medium odds

The company expects about $2.2 billion of capital expenditures in 2026. That spending can create value if leases are signed before capacity comes online. It can hurt returns if tenant demand slows or projects run late.

We watchNew megawatts leased, pre-leasing on the Northern Virginia pipeline, and data center capex versus plan.

ALM volumes shift with hardware cycles

Medium impact · Medium odds

ALM depends on companies and hyperscalers refreshing IT gear. If customers keep servers for longer, disposal volumes can be delayed. Management is trying to offset this by harvesting used memory and selling it back to OEM supply chains.

We watchALM revenue guidance, component pricing, and comments on server refresh timing.

Government digital wins take longer

Medium impact · Medium odds

FedRAMP high authorization should help Iron Mountain sell more digital solutions to agencies. But government sales can be slow, and one authorization does not guarantee fast bookings.

We watchBookings tied to InSight, progress on the $45 million Treasury contract, and new agency wins.

Valuation leaves little room

Medium impact · High odds

The operating story is better than it was, but the market already rewards the company for growth. If Data Center or ALM growth slows, the stock could fall even if the core RIM business remains steady.

We watchRevenue growth versus guidance, AFFO growth, and the stock's multiple versus specialty REIT peers.
06 Quick answers

In one breath

Is Iron Mountain a data center company now?

Not fully. Global RIM was still about 73% of Q1 2026 segment revenue, but Data Centers are growing much faster and are a key part of the investment case.

Why does Iron Mountain benefit from AI?

AI needs more computing power, which supports demand for data center capacity. AI hardware upgrades also create old servers and parts that can flow through Iron Mountain's ALM business.

What is ALM at Iron Mountain?

ALM means Asset Lifecycle Management. Iron Mountain collects old IT equipment, wipes data, recycles or resells parts, and helps customers prove the process was secure.

What is the biggest risk for IRM stock?

The main risk is that growth spending and debt stay high while demand slows. Valuation is also a risk because the stock already reflects a strong growth outlook.