Iron Mountain: Data Center Leasing Is The Main Growth Driver

Iron Mountain (IRM) is rated a Buy on the ability of its legacy records business to fund data center growth. Legacy RIM shows 93.4% retention and a 43.3% EBITDA margin, supporting stable cash flow, while data center revenue grew 39% y/y in Q2 2026. Leasing momentum is strong with 71.2% of the development pipeline pre-leased, indicating high visibility into future expansion.

Analysis

IRM’s real bull case is not the legacy storage cash flow itself; it is that the annuity-like base can subsidize a capital-intensive re-rating story in data centers. If management keeps converting pipeline into contracted capacity, the market can begin valuing IRM less like a niche records REIT and more like a hybrid infrastructure owner with longer-duration growth, which matters for FFO multiple expansion more than near-term EBITDA growth.

The main second-order winner set is the adjacent data-center supply chain: electrical equipment, cooling, and power-interconnect vendors benefit if IRM’s leasing momentum translates into funded builds. Relative losers are higher-multiple colocation names such as DLR/EQIX if IRM proves it can grow at similar rates with a cheaper funding base; that said, those names have cleaner assets and could outperform if investors decide IRM’s growth is too capex-heavy to deserve a premium.

Risk is mostly execution and financing, not demand. The thesis weakens quickly if power delivery or permitting delays push out commencements, or if higher rates raise the cost of capital faster than lease economics can reprice. Near-term, watch the next print for conversion from pre-leased to revenue-producing capacity; over 6-18 months, the key falsifier is any slowdown in the data-center growth rate that forces the stock back to valuing only the legacy segment.

Contrarianly, the market may be underpricing the optionality embedded in a stable cash engine funding scarce supply, but it may also be overestimating how much of the growth is self-funded versus levered. The stock likely works best if investors start treating the data-center segment as durable, not episodic.

Key Decisions for Investors

• Long IRM on pullbacks over the next 1-3 months; base case is a 10-15% rerating if lease conversion and guidance stay intact.
• Pair trade: long IRM / short DLR or EQIX as a relative-value expression on valuation gap closure if IRM keeps delivering >30% data-center growth.
• Set a downside alert on IRM if management signals capex intensity rising faster than pre-leasing or if funding costs reprice materially higher; that would invalidate the multiple-expansion case.
• If buying options, prefer a 6-12 month call spread rather than outright calls to express upside from re-rating while limiting exposure to construction/slippage risk.