stockrowWhat it does
Crown Castle is a U.S. communications-infrastructure real estate investment trust. It owns, operates and leases space or capacity on approximately 40,000 cell towers across the United States. Wireless carriers and other tenants place antennas and related equipment on those towers to provide mobile coverage and network capacity.
Its core product is access to tower sites under long-term tenant contracts, including leases, licenses, subleases and service agreements. A single tower can host multiple tenants, allowing carriers to use existing infrastructure rather than build and operate a separate structure. At December 31, 2025, the average tower had approximately 2.4 tenants.
The company also provides ancillary site-development work, mainly pre-construction services such as site acquisition, architecture and engineering, zoning, and permitting for new or modified tenant equipment. These services are separate from tower contracts and are generally non-recurring.
Crown Castle sold its small-cell and fiber businesses on May 1, 2026 and became a pure-play U.S. tower operator. The company has also deployed more than 100 edge-compute sites in trials, using selected tower locations with existing power and broadband connectivity.
How it makes money
Crown Castle earns most of its revenue by renting tower space and capacity to tenants. Contracts generally have initial terms of five to 15 years, multiple tenant renewal options, limited tenant termination rights and contractual rent escalators. The company generally receives monthly rent and sometimes upfront payments. Its renewable contracts have historically produced annual tenant retention of 98% to 99%.
The company seeks to grow site-rental revenue by placing additional tenants on existing towers or by expanding equipment already installed by existing tenants. Because the tower and much of its operating base are already in place, it expects those additions to carry low incremental operating cost. Most towers can accommodate extra tenants either as built or after modifications.
Site rental revenue represented 90.0% in 2025. Site-rental revenue was $4.0 billion in 2025; it was $966.0 million in Q3 FY2026. Services and other revenue principally comes from site-development work, which is negotiated and priced separately, generally billed at a fixed fee and does not necessarily recur.
Crown Castle operates as a REIT for U.S. federal income-tax purposes. It is generally entitled to deduct dividends it pays and is generally not subject to federal corporate income tax on net taxable income that it currently distributes. To maintain REIT qualification, it generally must distribute at least 90% of REIT taxable income, subject to the stated rules.
Third-quarter organic growth, excluding Sprint cancellations and DISH terminations, was 3.5%, or $35 million. Services margin was $15.0 million in Q3 2026.
Customers and how it sells
Crown Castle’s largest customers are wireless carriers operating national networks. T-Mobile accounted for 40.0% of 2025 site-rental revenue, AT&T accounted for 27.0%, and Verizon Wireless accounted for 22.0%. All other customers accounted for 89.0% under the supplied customer-share measure. The three named carriers collectively accounted for approximately 90% of 2025 site-rental revenue.
The company maintains master agreements with T-Mobile, AT&T and Verizon Wireless. These agreements set terms, including economic terms, for underlying tower contracts made during their term. National-account directors manage relationships with the largest tenants, while the sales organization is organized by tenant type and geography.
Virtually all tower operations are in the United States. Approximately 56% of towers are in the 50 largest U.S. basic trading areas, and approximately 71% are in the 100 largest. The company also has tower operations in Puerto Rico. Its tower portfolio includes approximately 40,000 U.S. sites.
The company resolved a commercial issue with one of its largest customers by acquiring a residual economic interest in certain sites and extending that customer’s lease terms for those sites.
Suppliers and costs
Crown Castle does not describe a manufacturing operation or identify key or sole-source suppliers for its tower business. Its principal site-level input is access to land beneath towers. Approximately 40% of towers Adjusted Site Rental Gross Margin comes from towers on land the company owns, including fee interests and perpetual easements; approximately 60% comes from land it leases, subleases, manages or licenses.
Ground leases make up approximately 75% of site-rental operating costs excluding depreciation, amortization and accretion. The remaining costs include employee compensation and benefits, property taxes, repairs and maintenance, and utilities. Land contracts under the towers had an average total remaining life of approximately 35 years, including renewal terms exercisable by Crown Castle and weighted by towers Adjusted Site Rental Gross Margin.
Once built, towers generally need limited sustaining capital expenditure, typically approximately 1% of net revenue. The company expects to buy more than 400 ground leases in 2026, and says those purchases improve margin and operational control. The company had 4,000 employees in FY2025.
- Revenue$4.3B
- Cost of revenue−$1.1B
- Selling, general and administrative−$383.0M
- Other operating costs−$701.0M
- Operating income$2.1B
Competitive position
Crown Castle competes for tower tenants with other independent tower owners and operators, owners and operators of small cells, carrier-owned towers, and alternative tower-deployment methods. American Tower Corporation and SBA Communications Corporation are named as two of its largest competitors. Competition for site-development services includes consultants, real estate and construction firms, tower owners or managers, radio-frequency engineering consultants, tenants’ internal staff or contractors, and telecommunications-equipment vendors.
The company identifies location, existing tower footprint, deployment speed, service quality, expertise, reputation, capacity and price as significant competitive factors. Tenants can also elect to self-perform rather than use Crown Castle’s infrastructure or services.
Our reading: Crown Castle’s existing U.S. tower footprint is a meaningful moat because its sites are geographically dispersed, have a significant presence in each of the top 100 U.S. basic trading areas, and host multiple tenants; replicating individual locations can require zoning and construction approvals. [item1]
Our reading: Long-term contracts, contractual escalators and a historical 98% to 99% retention rate provide a contractual moat, but it is limited by tenant consolidation, non-renewals and the ability of carriers to use their own infrastructure or alternative deployment methods. [item1; item7]
Our reading: Land control supports the tower model, though a substantial share of tower margin remains tied to leased, subleased, managed or licensed land. [item1]
| Competitor | Where they compete | Threat (our reading) |
|---|---|---|
| American Tower Corporation | U.S. tower tenants | High |
| SBA Communications Corporation | U.S. tower tenants | High |
Growth opportunities
Crown Castle expects tower demand to be supported by increasing mobile-data consumption, 5G network upgrades, bandwidth-intensive applications including artificial intelligence, additional spectrum availability, and government connectivity initiatives. It expects tenants to add equipment or new tenancies to improve coverage and capacity, and it can also construct or acquire towers and acquire land interests beneath existing towers.
Customers and other wireless operators have committed capital to spectrum assets, including acquisitions by AT&T, Verizon and SpaceX. The company expects the FCC to auction approximately 800 MHz of spectrum, including approximately 160 MHz of upper C-band spectrum expected to be auctioned by July 2027. The company says new spectrum deployment has historically driven network investment.
The company is expanding its ground-lease buyout program. It expects to purchase more than 400 ground leases in 2026, more than double the number completed in 2025. It says this can improve margin and operational control.
Crown Castle is also testing edge-compute infrastructure at tower locations. It has more than 100 edge sites deployed and several concurrent trials. It identified approximately 5,000 existing structures or shelters at its sites that could in many cases accept customers immediately, but says it is still assessing whether edge solutions will scale. More than 90.0% of full-year 2026 organic growth, excluding Sprint cancellations and DISH terminations, was contracted at the end of Q2 2026.
- $6.3BFY2021
- $7.0BFY2022
- $4.7BFY2023
- $4.5BFY2024
- $4.3BFY2025
Structural risks
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Customer concentration and carrier activity. Demand depends substantially on a small number of wireless carriers maintaining or increasing network investment. T-Mobile, AT&T and Verizon Wireless collectively generated approximately 90% of 2025 site-rental revenue, and carrier consolidation, network sharing, roaming arrangements or changes in capital allocation can reduce demand.
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Tenant non-renewals and DISH. Site-rental revenue fell in 2025 partly because of $204 million of non-renewals tied to the T-Mobile and Sprint network consolidation. The company delivered a default and termination notice to DISH in January 2026; its 2026 outlook excluded DISH revenue. DISH-related proceedings are paused for court-ordered mediation while the parties seek a settlement.
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Technology and deployment alternatives. Changes in technology could reduce the number or type of infrastructure needed, make existing networks obsolete or create substitutes for towers. Tenants may build and operate their own towers or use other deployment methods.
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Debt and capital-allocation constraints. Substantial indebtedness can limit the ability to react to business changes, while debt terms restrict some actions. At Q3 2026, net debt to annualized Adjusted EBITDA was 6.5× and 97.0% of debt was fixed rate.
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Land, permitting and regulation. Most site-rental operating costs are ground-lease expense. Zoning, FCC, FAA, environmental and other regulations can delay or prevent tower construction and modification, add costs, or result in fines or loss of operating rights.
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REIT requirements. Dividend payments reduce cash available for discretionary investments. The company generally must distribute at least 90% of REIT taxable income to maintain REIT qualification.
Bottom line
Our reading
Our reading: Crown Castle is a U.S. tower landlord whose recurring rental model depends heavily on three national wireless carriers and on tenants adding equipment to an existing 40,000-site portfolio. [item1; item7]
Our reading: Long-term contracts, low incremental cost for additional tenancies and land control underpin the business, while DISH termination effects, prior Sprint-related churn, customer concentration and leverage remain material constraints. [item1; item7; call_prepared]
Our reading: Following the fiber and small-cell sale, the company is more directly exposed to the U.S. tower cycle; spectrum deployment, ground-lease purchases and edge-compute trials are its stated avenues for future activity. [call_prepared; call_qa]