AMT vs CCI: How American Tower Corporation and Crown Castle owns Compare (2026)

Same yardstick, side by side (as of July 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. AMT and CCI share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined AMT and CCI exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

American Tower Corporation (NYSE: AMT), founded in 1995 and headquartered in Boston, is a real estate investment trust that owns, operates, and develops multitenant communications real estate. Its core business is leasing vertical space on wireless towers to mobile network operators, government agencies, and broadcasters under long-term contracts with annual escalators, generating 97% of 2025 revenue from property operations. Beyond towers, AMT owns CoreSite, a portfolio of 30 U.S. data centers offering colocation and interconnection services to enterprises, cloud providers, and network operators, which has become a fast-growing second revenue engine. The company manages nearly 150,000 communications sites across the Americas, Europe, Africa, and Asia-Pacific, providing global scale that smaller peers cannot easily replicate.

Full AMT guide

Crown Castle owns, operates, and leases shared communications infrastructure geographically dispersed across every major U.S. market, comprising approximately 40,000 cell towers and, until May 2026, roughly 90,000 route miles of fiber supporting small cells and fiber solutions. The company's revenue model is essentially that of a landlord: wireless carriers including Verizon, AT&T, and T-Mobile sign long-term leases to place their antennas and equipment on Crown Castle's structures, generating predictable, escalating site rental revenues. Because each tower can host multiple tenants simultaneously with minimal incremental cost, the model carries high operating leverage, and the tower segment has historically operated with very high margins on incremental revenue. Crown Castle converted to a Real Estate Investment Trust (REIT) structure in 2014, which requires it to distribute most of its taxable income as dividends. The company traces its roots to Castle Tower, founded in Houston in 1994 with 133 towers, which later merged with Crown Communications to form Crown Castle; it went public in 1998. Over the following decade it spent heavily on acquisitions, including fiber assets, accumulating a debt load of roughly $24 billion. Persistent activist pressure from Elliott Investment Management ultimately drove a strategic reversal: the company divested its fiber and small cell businesses in May 2026 for approximately $8.5 billion in total, deploying proceeds primarily toward debt reduction and share repurchases. Christian Hillabrant, who previously served as CEO of Vantage Towers AG and COO of Tillman Infrastructure, was appointed President and CEO effective September 15, 2025, and brings over three decades of digital infrastructure experience.

Full CCI guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• AMT drivers: 5G Densification and Mid-Band Upgrades; CoreSite and AI-Driven Data Center Demand.
• CCI drivers: Pure-Play Tower Focus Unlocks Operational Simplicity; 5G Densification Keeps Tower Demand Structural.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: The most immediate risk is customer concentration: in 2025, four carriers (T-Mobile at 18%, AT&T at 17%, Verizon at 14%, and Telefonica at 10%) collectively represented roughly 59% of total revenue, so any material lease dispute, consolidation event, or technology shift (such as carriers building private networks or relying on low-earth-orbit satellites) could disproportionately hurt results. For CCI, crown Castle's most acute risk is customer concentration: approximately 75% of revenue comes from just three carriers, and the DISH Wireless default vividly illustrates what happens when even a smaller tenant stops paying, resulting in contract termination and over $3.5 billion in disputed payments now in litigation.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick AMT if you believe its drivers more; CCI if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the AMT and CCI guides.

AMT. AMT's trailing P/E of approximately 27x is well below its own 3-year average of roughly 45x and its 10-year average of roughly 56x, reflecting both earnings normalization after a period of large one-time items and a broader re-rating of rate-sensitive REITs in a higher-for-longer interest rate environment. For tower REITs, investors typically focus on AFFO per share rather than GAAP earnings, because the latter is heavily influenced by depreciation and one-time currency gains or losses. On that basis, FY 2025 delivered high-single-digit AFFO per share growth, and management's 2026 guidance projects continued quarterly revenue in the $2.67 billion to $2.77 billion range per quarter, suggesting mid-single-digit full-year growth if realized.

CCI. For infrastructure REITs like Crown Castle, AFFO (Adjusted Funds from Operations) is generally regarded as the most relevant cash-generation metric because it strips out non-cash depreciation that distorts GAAP net income on long-lived assets. The ~$2.10 billion post-sale AFFO midpoint for the 12 months following the fiber divestiture represents a meaningful step-up from 2025, driven by cost savings and lower interest expense rather than top-line growth. The P/E ratio, while elevated versus the broader REIT peer average of roughly 23-25x, reflects the market pricing in the simplification premium and the growth re-acceleration expected in 2027 as DISH-related churn becomes a clean year-over-year comparison.

Headline figures (approximate, 2026-06-27): AMT shows revenue (q1 2026) ~$2.74 billion, revenue (fy 2024, most recent full year) ~$10.13 billion, adjusted ebitda (q1 2026) ~$1.84 billion (margin ~67%), affo per share (q1 2026) ~$2.84 (up ~3.3% year-over-year); CCI shows site rental revenue (fy2025) ~$4.05 billion, adjusted ebitda (fy2025) ~$2.86 billion, affo (fy2025) ~$1.90 billion, net income (fy2025) ~$444 million.

AMT and CCI are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined AMT and CCI exposure against your real portfolio. It is not an investment adviser.