Iron Mountain (IRM) Q4 2025: Data Center Revenue Jumps 39% as Growth Engines Reshape Portfolio
Iron Mountain’s fourth quarter capped a transformative year, with growth engines—data centers, asset lifecycle management (ALM), and digital—now central to its trajectory. Legacy storage remains a durable cash generator, but the mix shift toward scalable, tech-enabled services is accelerating. Management’s guidance signals double-digit growth and margin expansion, underpinned by robust customer demand and a deep pipeline of large-scale projects.
Summary
- Growth Portfolio Drives Mix Shift: Data center, ALM, and digital businesses now anchor Iron Mountain’s growth algorithm.
- Recurring Storage Remains Cash Engine: Physical storage still funds expansion, but is increasingly leveraged for cross-sell and platform integration.
- 2026 Outlook Anchored by Backlog: Large-scale pre-leasing, ALM pipeline, and digital wins support management’s double-digit growth targets.
Business Overview
Iron Mountain is a global leader in information management, generating revenue from physical storage, digital transformation, data centers, and asset lifecycle management (ALM, secure IT asset disposition and remarketing). The business is split between its legacy Records and Information Management (RIM) segment, high-growth Data Center operations, Digital Solutions (including the DXP AI platform), and the rapidly scaling ALM unit. The company serves over 240,000 customers, including 950 of the world’s 1,000 largest companies, with a global footprint spanning 61 countries.
Performance Analysis
Iron Mountain posted record results in Q4, with revenue, adjusted EBITDA, and AFFO all growing at double-digit rates. Data center revenue surged 39% year-over-year, reflecting robust demand from hyperscalers and enterprise clients, while ALM revenue soared 70% (56% organically), benefiting from both volume and favorable memory pricing. Digital Solutions crossed $500 million in annual revenue, achieving double-digit growth and expanding recurring revenue to over 40% of the segment.
Legacy physical storage delivered steady mid-single-digit growth, providing the cash flow foundation for investment in growth segments. Service revenues outpaced storage, lifting total gross margin despite mix dilution, and services margin improved across all business lines. Operating leverage was evident, with SG&A as a percentage of revenue at multi-year lows and adjusted EBITDA margin reaching a record high.
- Data Center Leasing Momentum: 43 megawatts leased in Q4, with a backlog supporting >25% data center revenue growth in 2026.
- ALM Penetration Expands: Fortune 1000 customers utilizing ALM services rose to 360, up 33% year-over-year.
- Digital Platform Gains Traction: DXP deal volume and average contract size more than doubled, driven by AI-enabled solutions.
Growth businesses contributed two-thirds of consolidated growth, and now represent nearly $2 billion in annualized revenue, reshaping Iron Mountain’s earnings profile for the next phase.
Executive Commentary
"Collectively, these three growth businesses of data center, ALM, and digital grew more than 30% in 2025 to nearly $2 billion in revenue. They accounted for two-thirds of our growth, or eight percentage points of growth, on a consolidated basis."
Bill Meany, President and Chief Executive Officer
"Adjusted EBITDA of $705 million expanded $100 million, or 17% year-on-year... Adjusted EBITDA margin was 38.3%, which is the highest level we have ever reported for this metric so far."
Barry Heitman, Executive Vice President and Chief Financial Officer
Strategic Positioning
1. Data Center Scale and Visibility
Iron Mountain’s data center pipeline is robust, with 400 megawatts of capacity set to energize over the next 24 months, half within 18 months. Pre-leasing discipline and prime market positioning (Northern Virginia, Richmond, London, Madrid, India) drive confidence in achieving 100+ megawatts of new leases in 2026. Hyperscaler partnerships and high renewal spreads (9-12%) reinforce pricing power and long-term demand visibility.
2. ALM as a Multi-Billion Dollar Platform
ALM revenue growth was driven by both volume and pricing, especially in memory components, with hyperscale projects accounting for around 40% of the segment. Enterprise penetration is deepening, and recent acquisitions add to scale, but organic growth remains the primary engine. Management sees ALM as a global, multi-billion dollar opportunity, leveraging Iron Mountain’s footprint and cross-sell capabilities.
3. Digital Transformation and AI Solutions
The DXP platform, Iron Mountain’s AI-powered digital offering, is winning larger, multi-year contracts across financial, government, and healthcare verticals. Recurring revenue now comprises over 40% of digital, and the pipeline continues to build, underpinned by demand for unstructured data extraction and regulatory compliance.
4. Legacy Storage as Strategic Foundation
Physical storage remains a high-margin, cash-generating anchor, enabling investment in growth segments. Consistent volume and pricing growth, along with cross-sell from the 240,000-customer base, reinforce its role as a strategic platform for new services.
5. Capital Allocation and Margin Expansion
Iron Mountain is prioritizing dividend growth and high-return investments, maintaining a payout ratio in the low 60% range. CapEx is focused on pre-leased data center expansions, with 2026 levels slightly below 2025. SG&A leverage and AI-driven efficiencies are expected to continue driving margin gains.
Key Considerations
Iron Mountain’s Q4 results mark a clear acceleration in its pivot to scalable, higher-growth businesses, while maintaining the stability of its legacy storage platform. The interplay between recurring cash flow and new growth verticals is central to its investment case.
Key Considerations:
- Data Center Backlog Provides Multi-Year Visibility: Pre-leased capacity and market demand from hyperscalers support sustained growth and pricing power.
- ALM Pricing Tailwind May Normalize: Memory component pricing was a material driver in 2025, but future growth will depend on volume and cross-sell execution.
- Digital Solutions Pipeline Expanding: DXP’s AI capabilities and regulatory certifications (FedRAMP) position the business for increasing federal and enterprise wins.
- Operating Leverage and Margin Expansion: Lowest SG&A ratio in years and ongoing efficiency gains fuel bottom-line growth.
- Capital Discipline Remains Intact: CapEx is tied to pre-leasing, and management is not pursuing large M&A in data centers, focusing instead on organic growth and tuck-in ALM deals.
Risks
Iron Mountain faces risks from potential normalization in ALM memory pricing, competitive intensity in data centers, and macro-driven delays in customer outsourcing decisions. Execution risk exists in scaling digital and ALM globally, and any operational missteps could impact margin expansion. Large project ramps, such as the Department of Treasury contract, are subject to timing and government procurement cycles, which may introduce revenue variability.
Forward Outlook
For Q1 2026, Iron Mountain guided to:
- Revenue of approximately $1.855 billion (up 16% YoY)
- Adjusted EBITDA of approximately $685 million (up 18% YoY)
- AFFO of approximately $415 million (up 19% YoY)
- AFFO per share of approximately $1.39 (up 19% YoY)
For full-year 2026, management raised guidance:
- Total revenue of $7.625 to $7.775 billion (up 12% YoY at midpoint)
- Adjusted EBITDA of $2.875 to $2.925 billion (up 13% YoY at midpoint)
- AFFO of $1.705 to $1.735 billion (up 12% YoY at midpoint)
- AFFO per share of $5.69 to $5.79 (up 11% YoY at midpoint)
Management highlighted:
- Data center revenue expected to exceed $1 billion, with >25% growth and margin expansion.
- ALM revenue targeted at $850 million, with organic enterprise growth above 20%.
- Department of Treasury contract expected to contribute $45 million in 2026, ramping to $100 million+ in 2027.
- Continued focus on pre-leasing before data center construction and tight capital discipline.
Takeaways
- Growth Engine Mix Shift: Data center, ALM, and digital now drive the majority of Iron Mountain’s growth, reducing reliance on legacy storage and expanding addressable markets.
- Margin and Cash Flow Strength: Record EBITDA margin and disciplined SG&A management underpin robust cash generation, supporting dividend growth and reinvestment.
- Visibility with Embedded Upside: Backlog, cross-sell opportunities, and a growing digital pipeline provide multi-year growth visibility, with execution on large contracts and new markets as key future catalysts.
Conclusion
Iron Mountain’s quarter showcased a business in transition, leveraging its legacy strengths to fund and scale high-growth, tech-enabled platforms. With a record backlog and deep customer relationships, the company is well-positioned for sustained double-digit growth, though execution in scaling new businesses and managing pricing normalization will be critical watchpoints.
Industry Read-Through
Iron Mountain’s results reinforce the accelerating demand for outsourced data center capacity, especially from hyperscalers, a trend likely to benefit peers with prime land banks and pre-leasing discipline. ALM’s rapid growth and pricing tailwinds highlight the opportunity in secure IT asset disposition, suggesting further consolidation and cross-sell potential in a fragmented market. Digital transformation demand, particularly for AI-powered data extraction and compliance, signals a broadening market for information management providers. Operators with recurring cash flow and platform integration capabilities are best positioned to capture these secular shifts, while those reliant on legacy models may face increasing margin and mix pressure.