Iron Mountain (IRM): Analysts Raise Fair Value on AI Colocation Growth, September 2026

Equity analysts lifted Iron Mountain's fair value estimate after raising AI-driven colocation and retrofit growth assumptions, as the REIT's FY2025 capital expenditure climbed 26.8% to $2.27 billion.

On September 6, equity analysts lifted Iron Mountain's fair value estimate after revising upward their assumptions for AI-driven colocation and facility-retrofit growth — a recalibration that reflects a shifting market consensus about the company's ability to convert its large legacy footprint into compute-ready infrastructure. The stock, which had pulled back roughly 4.3 percent from levels above $120 in late August, was trading at $115.18 on September 11, up 2 percent on the day, as investors weighed the upgraded outlook against lingering valuation concerns.

The revision followed Iron Mountain's second-quarter 2026 earnings call, which emphasized AI-driven data-center capital expenditure and capacity-leasing momentum. Slicast's compilation of SEC XBRL data shows Iron Mountain's FY2025 capital expenditure reached $2.27 billion, up 26.8 percent from $1.79 billion in FY2024, and equivalent to 33 percent of its $6.90 billion in FY2025 revenue. The single largest quarterly outlay on record reached $675 million for the period ending March 31, 2025. Among the data-center operators Slicast tracks, Iron Mountain ranks third of three by absolute capital expenditure, behind Equinix, and fourth of four by capex intensity, behind Digital Realty — a positioning that reflects its role as an expanding challenger rather than a dominant hyperscale landlord.

Iron Mountain's pivot from document-storage REIT to data-center operator has been in progress for the better part of a decade. A recurring pattern of debt and equity financings — evidenced by 8-K filings stretching back to at least 2021 — funded the buildout of data-center assets alongside the company's core records-management business. By mid-2026 the stock had approached record levels on the NYSE, as investors began pricing in the AI compute cycle more aggressively. The argument gaining traction now concerns retrofit value: older Iron Mountain facilities, historically overbuilt for low-density document storage, may carry excess power capacity that AI tenants — with their dense compute demands — are well positioned to absorb. Whether that conversion is achievable at scale, and at the margins analysts are now modeling, remains the open question at the center of the bull case.

Geography is also widening. On September 3, Iron Mountain announced a strategic partnership with Saudi Arabia's Social Development Bank to grow its data-center presence in the Middle East, a region where sovereign and institutional AI investment is accelerating. The arrangement was reported by the Saudi Gazette; specific contract terms and committed capacity have not been separately disclosed. The steady stream of agreement-and-financing 8-K filings Iron Mountain has lodged with the SEC across 2021 through 2025 suggests a deliberate effort to build out the capital structure needed to underpin international expansion, even if the operational details of individual transactions remain opaque at the time of filing.

The investment case carries real counterweights. Iron Mountain's leverage profile is typical of infrastructure REITs, but high leverage amplifies downside if demand assumptions prove optimistic. Its 33 percent capex intensity — already the lowest among the data-center peer set Slicast tracks — suggests the company is deploying less aggressively than Digital Realty or Equinix, a constraint that could become visible if hyperscale demand accelerates faster than Iron Mountain can commission capacity. The stock's failure to reclaim $120 after August's correction, settling around $115 instead, points to institutional buyers accumulating rather than chasing. Three concrete signals are worth monitoring: the rate at which new AI-targeted capacity leases up and at what power density, whether Iron Mountain's next quarterly filing discloses committed revenue from the Middle East partnership, and the trajectory of per-megawatt pricing in its colocation business as competing supply continues to come online.