American Tower Corporation vs Iron Mountain
Side-by-side comparison of AI visibility scores, market position, and capabilities
Boston wireless tower REIT (NYSE: AMT) with 148,957+ sites and $10.3B TTM revenue; Q1 2025 highest services revenue since 2021 from 5G mid-band deployments by AT&T/Verizon competing with Crown Castle for wireless infrastructure.
About
American Tower Corporation is a Boston, Massachusetts-based Real Estate Investment Trust (REIT) — publicly traded on the New York Stock Exchange (NYSE: AMT) as an S&P 500 component — operating as one of the world's largest independent owners, operators, and developers of wireless communications infrastructure, with 148,957+ communications sites (cell towers, distributed antenna systems, and data centers) as of December 2024 across the United States, Canada, Europe, Latin America, Asia-Pacific, and Africa. In Q1 2025, American Tower reported the highest services revenue quarter since 2021, driven by accelerating mid-band 5G deployments in the US by Verizon, AT&T, and T-Mobile. Trailing 12-month revenue reached $10.3 billion as of June 2025. CEO Steven Vondran has led the company since April 2023. REIT structure (elected 2012) provides the tax-advantaged pass-through structure for the long-term contracted rental income from wireless carrier tenants. Founded 1995 as American Radio Systems; NYSE IPO 1998.
Hybrid records storage and data center REIT with $6.1B FY2024 revenue; 5 GW data center target by 2030 from AI demand; 20%+ data center revenue growth; hyperscaler leases with Microsoft, Google.
About
Iron Mountain Incorporated is a global storage and information management services company that has evolved from a physical records storage business into a hybrid physical-and-digital infrastructure REIT, founded in 1951 by Herman Knaust in an abandoned iron ore mine in Livingston, New York, and now headquartered in Boston, Massachusetts, trading on NYSE (IRM). The company generated approximately $6.1 billion in revenues for FY2024 under CEO William Meaney, managing over 1,450 facilities across 60+ countries. Iron Mountain's physical Records Management segment—storing approximately 750 million cubic feet of physical records in its vast warehouse network and providing secure document destruction through Recall and SFG subsidiaries—generates highly predictable, recurring storage rental revenues from long-term contracts with corporations, healthcare providers, government agencies, and financial institutions obligated by regulatory retention requirements to preserve documents for decades.
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