American Tower Corporation (AMT) Business Profile

What it does

American Tower Corporation is a real estate investment trust that owns, operates and develops shared communications real estate. Founded in 1995 and headquartered in Boston, it leases space on towers and other communications sites to wireless carriers, broadcasters, wireless-data providers, government agencies, municipalities and other tenants.

A tenant installs and maintains its own radios, antennas and related equipment at an American Tower site. The company also operates distributed antenna system networks for wireless coverage in buildings and outdoor areas, manages rooftop and tower sites for property owners, and leases certain fiber, land and power-related infrastructure. Its U.S. data centers provide space, power, cooling and network connectivity for enterprises, network operators, cloud providers and supporting service providers; facilities at network-convergence points can serve as interconnection hubs.

The portfolio contained 149,686 communications sites as of December 31, 2025, including 30 operating data center facilities across eleven U.S. markets. American Tower reports six segments: U.S. & Canada property, Africa & APAC property, Europe property, Latin America property, Data Centers and Services. Its U.S. services operation handles site applications, zoning and permitting, structural and mount analyses, construction management and program management, largely to help customers add equipment or tenants to sites.

How it makes money

American Tower primarily earns rent under leases for space on communications sites and in data centers. Pricing for a tower tenant varies with the amount, type and position of equipment, remaining capacity and the site’s location. Tenants may also reimburse or share expenses such as ground rent, power and fuel in certain markets.

Property operations accounted for 97% of total revenue in FY2025. Communications-site leases with wireless carriers generally begin with non-cancellable five- to ten-year terms, have multiple renewal terms, and commonly include annual rent increases. U.S. escalators average approximately 3%; most international leases use an inflation index or a combination of a fixed increase and an index. Based on leases and exchange rates at December 31, 2025, American Tower expects over $54 billion of future non-cancellable tenant lease revenue before straight-line accounting. Churn was approximately 2% of tenant billings in FY2025.

Adding a tenant or additional equipment to an existing site generally requires limited incremental operating cost, while construction, permitting and structural services support deployments and can produce service revenue. Data-center revenue includes rental and power revenue, lease escalators and renewals, and interconnection services.

FY2025 property operations represented 97% of total revenue. Management said on the Q3 2026 call that data-center property revenue grew over 16% year over year in the quarter, excluding non-cash straight-line revenue.

Customers and how it sells

American Tower serves wireless service providers, radio and television broadcasters, wireless-data providers, government agencies, municipalities, enterprises, network operators, cloud providers and supporting service providers. Its tower customers lease space for their network equipment; data-center customers use space, power, connectivity and interconnection.

Revenue is concentrated among a small group of carriers. Four customers represented 59.0% of FY2025 revenue: T-Mobile represented 18.0%, AT&T 17.0%, Verizon Wireless 14.0% and Telefónica 10.0%. In U.S. & Canada property, AT&T, T-Mobile and Verizon Wireless together accounted for 85% of segment revenue in 2025. In Africa & APAC, Airtel and MTN were the largest named customers; Telefónica was the largest named Europe customer; and América Móvil, AT&T, Telefónica and TIM were named leading customers in Latin America.

The site portfolio spans the United States and Canada, Africa & APAC, Europe and Latin America. The U.S. data-center business serves eleven markets. American Tower also manages rooftop and tower sites for third-party property owners, rather than owning every site it operates.

Suppliers and costs

American Tower’s direct property costs principally include ground rent, power and fuel, property taxes, repairs and maintenance. Ground rent is primarily fixed under long-term leases with annual escalations. In some international markets, tenants reimburse or share ground-rent and power-and-fuel costs through pass-through arrangements.

The company must also fund maintenance, site-capacity upgrades, new tower and data-center construction, managed-network installations, land interests and acquisitions. Tower-related services require permitting, engineering, construction-management and contractor coordination. Data centers consume significant power and may face higher electricity costs from regulation or changes affecting power generation.

Its operating model does not depend on manufacturing a standardized physical product. Adding tenants or equipment to an existing communications site usually carries limited incremental operating costs, while development and expansion can temporarily dilute margins. American Tower had $37.4 billion of outstanding indebtedness as of December 31, 2025, including a current portion of $3.4 billion, making debt service and refinancing part of its cost and liquidity structure.

Competitive position

American Tower competes for tower leasing business and asset acquisitions with public tower companies, private tower companies, carrier-affiliated tower companies, wireless carriers, broadcasters and owners of alternative structures such as rooftops, utility towers and water towers. Named public or independent tower competitors include Crown Castle International Corp., SBA Communications Corporation, Vertical Bridge, Telesites S.A.B. de C.V. and Cellnex Telecom, S.A. Its data-center business competes with providers of data-center space, power, interconnection and development services. Its services operation also faces consultants, engineering firms, construction managers, tower owners, equipment vendors and customers’ internal personnel.

Location and available capacity, grid-distribution constraints, interconnection density, price, service quality and speed are competitive factors. American Tower states that tenants tend to renew because suitable alternatives may not exist and moving a network site can be expensive or reduce network quality.

Our reading: The existing-site leasing model has a strong moat where a site is suitably located and a carrier needs more equipment capacity, because repositioning can be costly and incremental colocation costs are limited. [item1]

Our reading: Long lease terms, annual escalators and a global installed portfolio reinforce that moat, but customer concentration and competing tower, rooftop and alternative-structure owners limit its strength. [item1]

Growth opportunities

American Tower seeks to increase occupancy at existing communications sites, develop or acquire sites and expand selected infrastructure offerings. The company expects wireless-carrier spending on 5G deployments in the United States and advanced-network deployments internationally to support additional equipment and tenants on existing sites. It also expects spectrum deployment, network densification, edge computing, autonomous-vehicle networks and other connected-device applications to create potential demand over time.

Management said on the Q3 2026 call that the tower business was on track for approximately 4% organic tenant-billings growth excluding one-time DISH-related impacts. Management also said that approximately 800 MHz of additional mobile spectrum is expected to become available over coming years, beginning with upper C-band in 2027. These are company expectations, not completed leasing activity.

The data-center growth plan centers on CoreSite. Management said on the Q3 2026 call that its development pipeline can nearly triple current capacity, subject to customer demand and expected returns. Management also said that the first megawatt at the Raleigh edge facility had leased and the second was almost completely leased. The company is exploring organic CoreSite expansion into new markets while completing entitlement work.

American Tower also builds under a contract to build 3,000 sites for Telefónica over 10 years beginning with the Telefónica acquisition.

Structural risks

• Leasing demand can fall if wireless or colocation demand weakens, carriers and cloud providers reduce network investment, providers consolidate or share networks, next-generation deployments are delayed, or technology changes reduce demand for sites.

• Customer concentration exposes revenue and cash flow to a small number of carriers. Financial difficulty, bankruptcy, reduced operations or market exits by a large customer could impair collections and leasing demand.

• International operations face currency fluctuations, inflation, political and economic disruption, foreign-ownership restrictions, licensing changes, repatriation limits, site-security issues and power-grid reliability risks.

• Zoning, environmental, aviation, health, tax and other regulation can delay or prevent new towers, antennas and data centers, add compliance costs, or lead to penalties or deconstruction orders.

• Leverage and debt-service obligations can reduce funds for capital expenditure and REIT distributions, constrain additional financing and restrict flexibility. American Tower must distribute at least 90% of REIT taxable income annually to maintain REIT qualification.

• Data centers require significant electricity consumption; power costs, environmental requirements, local opposition and construction approvals may raise costs or delay projects. Technology failures, cybersecurity incidents or loss of personal information may also result in substantial costs and other negative consequences.

Bottom line

Our reading

Our reading: American Tower is a shared-infrastructure landlord whose core cash flows come from long-term, escalated leases on communications sites, supplemented by U.S. data centers and services. [item1, item7]

Our reading: The business rests on carrier network investment and a concentrated customer base, while international regulation, currency exposure, power costs and substantial debt add operating and financial sensitivity. [item1, item1a, item7]

Our reading: CoreSite capacity expansion and additional spectrum deployment are important potential growth paths, but they depend on customer demand, deployment timing, permits and capital allocation. [call_prepared, facts]