TIP826: American Tower (AMT): The Wide Moat Business Your Phone Can't Live Without w/ Kyle Grieve & Shawn O'Malley

American Tower went public in 1998 at approximately 80 cents per share. Chuck Akre held it as a top four portfolio position for many years, achieving roughly 28,000 percent returns before selling heavily around 2020. AMT now represents only 0.14 percent of Akre Capital Management's portfolio, and Kyle Grieve speculates this reflects a recognition that the business can no longer grow faster than the benchmark, though he acknowledges that is uncertain.

AMT is a REIT owning nearly 150,000 tower assets globally, split across approximately 42,000 in North America, 47,000 in Latin America, 32,000 in Europe, and 28,000 in Africa and Asia Pacific. The core economic logic is extreme operating leverage from multi-tenancy. Building a tower for one tenant costs roughly 275,000 dollars, generates about 20,000 dollars in revenue against 12,000 dollars in operating expenses, and produces a gross margin near 40 percent. Adding a second tenant raises revenue approximately 400 percent while operating expenses rise only 16 percent, pushing gross margins to 74 percent. A third tenant pushes margins to 83 percent. Land cost is fixed regardless of tenant count, which is the mechanical source of this leverage.

AMT owns the land beneath its towers outright, which Grieve compares to Copart's land advantage, where sites acquired long ago are now surrounded by development and would cost competitors billions of dollars and multiple decades to replicate. Zoning and permitting create additional friction because regulators resist new large tower installations, and even 200 feet of deviation from the optimal tower location degrades network quality through dropped calls, dead zones, or interference. Once built, a tower cannot be relocated. Carriers already on an AMT tower face decommissioning costs, reinstallation, retesting, and downtime if they switch, and telecom employees who advocate switching take on significant personal career risk, making the status quo the default. AT&T, Verizon, and T-Mobile together generate over a quarter trillion dollars in combined revenue, making tower lease costs a rounding error relative to the network quality risk of switching.

US contracts carry a fixed 3 percent annual escalation clause and non-cancelable terms of five to ten years. The non-cancelable lease backlog is currently worth 54 billion dollars. Churn is approximately 2 percent as of 2025, but Grieve notes it is not a linear number that can be fully relied upon, and the 3 percent escalator leaves only a slim buffer above that rate. The primary driver of elevated churn has been carrier consolidation. In India, the Vodafone-Idea merger, Reliance Jio's entry, and the collapse of Tata Tele Services caused severe churn, and AMT fully exited India in 2024. In the US, T-Mobile's absorption of Sprint between 2021 and 2024 created multi-year churn as redundant Sprint leases wound down, though AMT negotiated a master lease agreement to spread cancellations over multiple years.

AMT carries approximately 37.3 billion dollars in debt against roughly 1 billion in cash, with net leverage of approximately five times adjusted EBITDA as of Q1 2026. The weighted average interest rate is 3.5 percent, and Grieve argues this transforms the debt load into a strategic asset when redeployment returns exceed borrowing costs. Shawn O'Malley counters that the high debt load makes equity less robust because creditors have first claim in a bankruptcy scenario, and that rolling over debt at materially higher rates would compress AFFO and could force a dividend reduction. Net leverage has risen from three times in 2017 to five times today even as revenue grew roughly 52 percent over the same period.

The two largest acquisitions were the Telxius deal in 2021 for 9.6 billion dollars, which doubled European tower footprint, and the CoreSight data center acquisition also in 2021 for 10.4 billion dollars at 27 times EBITDA, immediately before interest rates rose sharply. Grieve views the price paid as the core problem rather than the business itself, noting CoreSight revenue has grown at roughly 8 percent CAGR since acquisition with operating margins expanding from 46 to 53 percent. On satellite risk, AMT's CEO views satellites as complementary rather than competitive, primarily serving rural areas where AMT has no towers. O'Malley states he is inclined to place AMT in his too-hard bucket given the accumulation of new technology risks.

On valuation, AMT currently trades at roughly 19 times EV to EBITDA, a multiple not seen since 2017. Grieve's base case applies 5 percent revenue growth and assumes margins rise modestly to around 66 percent, producing returns just below 9 percent using a 21-times exit multiple with a 10 percent margin of safety. Both hosts conclude AMT does not fit their intrinsic value portfolio at current prices, with Grieve arguing that even at a lower price, long-term returns are unlikely to exceed the high single digits and that the business today carries question marks that did not exist when long-term holders like Akre built their positions.