American Tower (AMT) Q2 2025: CoreSite Drives 13% Data Center Growth as Densification Accelerates

2025-07-29 | By EarningsIQ Research

American Tower’s second quarter underscored the durability of its tower and data center platforms, with CoreSite posting over 13% growth and U.S. co-location activity up 200% year over year. Management raised 2025 guidance on FX tailwinds and robust leasing, while operational focus shifted toward cost discipline and capital allocation flexibility. With densification and 5G upgrades gaining momentum, AMT is positioning for long-term network demand, though timing of commencements and emerging market churn remain watchpoints into 2026.

Summary

• Data Center Outperformance: CoreSite’s double-digit growth and margin expansion highlight AI and hybrid cloud tailwinds.
• Tower Pipeline Strength: Application volume and co-location activity surged, signaling healthy carrier demand and early-stage densification.
• Capital Allocation Optionality: Leadership is prioritizing developed market investment, maintaining dividend growth, and weighing M&A versus buybacks as leverage moderates.

Performance Analysis

American Tower delivered a resilient quarter, buoyed by global leasing momentum and a standout performance in its data center segment, CoreSite. CoreSite’s property revenue rose over 13% year over year, driven by strong demand for interconnection, hybrid cloud, and early AI workloads. Gross margin in the segment expanded by 100 basis points, even as SG&A increased to support rapid growth. The acquisition of the Denver DE1 facility provided incremental revenue and further entrenched AMT’s position in a high-demand interconnection market.

In the core tower business, U.S. and Canada organic tenant billings grew 3.7%, or over 5% excluding Sprint churn, reflecting robust amendment and co-location activity. Notably, co-location applications increased by 200% year over year, a clear sign that 5G densification is moving beyond theory. Internationally, Africa and APAC organic growth exceeded 12%, offsetting persistent churn and muted growth in Latin America. Consolidated property revenue advanced 1.2% (over 3% ex-straight line), despite FX headwinds and non-recurring revenue drag. Cash adjusted EBITDA margins declined 40 basis points, reflecting a higher mix of services and some non-recurring costs, but overall cash conversion remained strong.

• CoreSite Margin Expansion: Operating profit margin rose by 100 basis points, even as SG&A rose to support new business.
• Co-Location Inflection: U.S. co-location applications up 200% YoY, now over 10% of total applications.
• Emerging Market Divergence: Africa and APAC outperformed, while Latin America remained challenged by churn and collections.

Adjusted AFFO per share rose 2.4% on a normalized basis, with management raising full-year expectations by $0.12 per share to $10.56 at the midpoint, or 6% growth year over year. The company’s balance sheet remains strong, with $10.5 billion in liquidity and leverage at 5.1x, targeting a reduction below 5x in the second half.

Executive Commentary

Strategic Positioning

1. Data Center Platform: CoreSite as Growth Engine

CoreSite, AMT’s interconnection-focused data center business, is emerging as a key growth driver, with double-digit revenue and margin expansion supported by AI, hybrid cloud, and multi-cloud demand. The recent acquisition of the Denver DE1 site solidifies its dominance in a high-density interconnection market, and management is actively curating customer mix to maintain yield discipline. The segment’s strength provides AMT with a differentiated position versus pure-play tower REITs, offering exposure to secular cloud and AI trends that extend beyond mobile network leasing cycles.

2. U.S. Tower Densification and 5G Upgrades

Application volumes in the U.S. surged over 50% year over year, with a notable 200% jump in co-location requests. This shift signals the early stages of 5G-driven densification, as carriers seek to meet aggressive coverage and quality targets for mid-band spectrum. While one major customer is pacing slower on commencements, management maintains that the pipeline remains robust and that timing issues are transient. The focus is on capturing both amendment (existing site upgrades) and co-location (new tenants on existing sites) revenue, which are increasingly material to the application mix.

3. International Portfolio: Mixed Signals

Emerging markets delivered divergent results: Africa continued to post robust growth as carrier economics improved and 4G rollouts accelerated, while Latin America remained hampered by elevated churn and collection challenges, despite some stabilization in Brazil. Europe’s mid-band 5G rollout is progressing steadily, with AMT’s exposure to consolidation risk described as modest and overall organic growth in line with expectations. CPI-linked escalators and low churn rates in Europe support a reliable mid-single-digit organic growth profile.

4. Capital Allocation and Financial Flexibility

AMT deployed over 75% of discretionary capital in developed markets, reflecting a clear bias toward stable, high-return geographies. The company issued €500 million in senior notes at 3.625% to pay down existing debt, keeping floating rate exposure low. Dividend growth remains a priority (aligned with AFFO growth), with $3.2 billion targeted for distribution in 2025. Management is weighing share buybacks, M&A, and further deleveraging as leverage approaches its sub-5x target, with a preference for value-maximizing moves in developed markets and the data center segment.

5. Cost Discipline and Margin Focus

Operational efficiency is a renewed priority, with a multi-year initiative to bend the cost curve and drive margin expansion in the tower business. Management is targeting slower growth in direct expenses relative to revenue, leveraging globalization efforts and supply chain initiatives. SG&A is expected to remain flat (excluding bad debt), even as legal costs and CoreSite support increase. The goal is to continuously expand gross margin, especially as the mix shifts toward services and data centers.

Key Considerations

AMT’s Q2 results reflect a business at the intersection of mobile network evolution and digital infrastructure demand, but also highlight the importance of execution in both core and adjacent segments.

Key Considerations:

• CoreSite’s Strategic Optionality: Outperformance in CoreSite strengthens AMT’s hand in edge compute and cloud infrastructure, while management remains open to maximizing value through potential partnerships or asset sales if warranted.
• Densification as a Medium-Term Tailwind: The surge in co-location activity indicates that 5G densification is moving from planning to execution, with amendments and new tenant additions both contributing to future growth.
• Emerging Market Volatility: Africa is a bright spot, but Latin America’s persistent churn, collections risk, and slow growth remain headwinds, with a true inflection not expected until 2028.
• Pipeline Timing Sensitivity: Delays in commencements from a key U.S. customer are a watchpoint, but do not signal underlying demand weakness. The book-to-bill cycle is the main variable, with most revenue expected to flow through as planned.
• Capital Allocation Flexibility: With leverage moderating and liquidity strong, AMT has the option to pursue M&A, buybacks, or further investment in high-return developed markets, depending on market conditions and asset valuations.

Risks

Risks remain around emerging market churn, collections issues (especially in Latin America), and the pace of U.S. carrier commencements, which could drive quarter-to-quarter variability. Regulatory changes, macroeconomic volatility, and supply chain disruptions (notably in data center equipment) are ongoing concerns. Exposure to customers like DISH and U.S. Cellular is limited in aggregate, but carrier consolidation and capital allocation shifts could impact site economics or churn rates unexpectedly.

Forward Outlook

For Q3 2025, American Tower guided to:

• Continued double-digit revenue growth in CoreSite, with margin expansion.
• Consolidated organic tenant billings growth of approximately 5%.

For full-year 2025, management raised guidance:

• Property revenue, adjusted EBITDA, and AFFO per share all increased, with AFFO per share midpoint now $10.56 (up $0.12 versus prior outlook).

Management highlighted several factors that shape the outlook:

• FX tailwinds and core leasing outperformance are driving upward revisions.
• Timing of commencements and emerging market churn are key variables for the second half and into 2026.

Takeaways

The quarter validated AMT’s strategy of combining global tower scale with a high-growth data center platform, while reinforcing the need for operational discipline as the industry shifts toward densification and AI-driven demand.

• Data Center Momentum: CoreSite’s performance is increasingly material, offering AMT secular growth beyond traditional tower leasing cycles.
• Tower Pipeline Health: Application and co-location surges suggest robust demand, but timing of commencements and churn management will dictate near-term results.
• Watch 2026 for Inflection: Densification and edge compute adoption could accelerate, but emerging market stabilization and carrier capital allocation remain critical swing factors.

Conclusion

American Tower’s Q2 results demonstrate the resilience and adaptability of its global infrastructure portfolio, with CoreSite’s outperformance and U.S. densification trends providing new legs for growth. Execution on cost discipline, capital allocation, and pipeline conversion will be pivotal as the company navigates the second half of 2025 and positions for a potential 2026 inflection.

Industry Read-Through

AMT’s results reinforce the industry-wide thesis that mobile data growth, 5G densification, and edge compute are converging to drive sustained infrastructure demand. The surge in co-location activity and CoreSite’s AI-driven growth provide a roadmap for other tower and data center operators seeking to capture value from secular trends in connectivity and cloud. Emerging market volatility and pipeline timing remain sector-wide risks, but the durability of contracted revenue and CPI-linked escalators in developed markets offer a template for resilient growth. Investors should monitor how peers balance capital allocation, cost discipline, and strategic optionality in an environment where network and compute infrastructure are increasingly interdependent.

AMT Real Estate Telecom Infrastructure Data Centers Towers Densification 5G Capital Allocation