American Tower Corp (NYSE: AMT) is a real estate investment trust that owns and operates wireless communications infrastructure, primarily multi-tenant tower sites leased to wireless carriers and other tenants. Revenue comes from long-term lease agreements under which tenants pay recurring fees to attach their antennas and equipment to AMT-owned structures. The 10-K filed 2026-02-24 for fiscal year ended December 31, 2025 describes operations in the communications infrastructure leasing industry across domestic and international markets. The business structure is multi-tenant by design: a single tower supports multiple carrier tenants simultaneously, and each additional tenant added to an existing structure carries high incremental margins because the fixed cost of the tower is already sunk. Customers are described as wireless carriers whose creditworthiness is cited as a material factor in the company's forward-looking disclosures. AMT is organized as a REIT and carries substantial leverage, with debt service obligations identified as a significant risk factor in the filing.

Revenue model

Recurring lease and license fees from wireless carriers and other tenants who attach equipment to AMT-owned tower and communications infrastructure sites. Contracts are long-term in nature. The multi-tenant structure means incremental tenant additions on existing towers generate high-margin revenue with minimal additional capital outlay.

Products and services

Multi-tenant wireless communications tower sites and related communications infrastructure. The 10-K (FY2025) lists Products and Services as a discrete section, with the core offering being tower leasing to wireless carriers.

Customers and end markets

Wireless carriers and communications service providers who require antenna attachment points for cellular network deployment. The filing identifies customer creditworthiness and financial strength as material factors, indicating concentration among large carrier customers.

Value-chain role

Infrastructure owner and operator sitting between land/property and wireless network operators. AMT owns the physical tower assets and leases vertical space to carriers, functioning as a passive infrastructure landlord in the wireless communications supply chain.

Geographic exposure

Domestic U.S. and international markets. The filing references the communications infrastructure leasing industry broadly and notes international operations, but specific country or segment revenue breakdowns are not extractable from the provided excerpts.

Source: SEC 10-K, filed 2026-02-24

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