AMT vs PSA: How American Tower Corporation and Public Storage 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.

Reading it: AMT is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.

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 PSA 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 PSA 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

Public Storage is a Maryland-based real estate investment trust (REIT) that acquires, develops, and operates self-storage facilities under the Public Storage brand. As of December 31, 2025, it owned or operated 3,533 self-storage facilities in 40 states encompassing roughly 258 million net rentable square feet, making it one of the two largest self-storage REITs in the United States by property count. The company derives revenue almost entirely from monthly rental income paid by individual and business customers renting climate-controlled and non-climate-controlled storage units. It also holds a 35% common equity interest in Shurgard Self Storage, which operates across seven European countries, providing modest international exposure. Additional income streams include tenant insurance programs, merchandise sales, and a growing third-party property management platform. In 2025, Public Storage acquired 87 facilities totaling 6.1 million square feet for $945.6 million, demonstrating active portfolio expansion alongside organic development. Public Storage was founded in 1972 by B. Wayne Hughes and Kenneth Volk Jr. and grew from a single facility in El Monte, California into the dominant national brand over five decades. The company has been listed on the NYSE as PSA and became an S&P 500 constituent as it scaled. Long-tenured CEO Joe Russell, who led a multi-year operational transformation, retired effective March 31, 2026. Under the PS4.0 initiative, Tom Boyle was elevated to CEO and Shankh Mitra became non-executive chairman effective April 1, 2026, signaling a new strategic phase focused on digital-first operations, margin expansion, and external growth through acquisitions, the first major move being the announced acquisition of National Storage Affiliates Trust.

Full PSA 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.
• PSA drivers: Scale and Margin Leadership; NSA Acquisition Adds Immediate Scale.

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 PSA, the most immediate risk is that same-store revenue is already guided to decline in 2026 (PSA's own guidance calls for same-store NOI growth of negative 3.9% to negative 0.5%), reflecting ongoing supply pressure in Sunbelt and Southeast markets and soft post-pandemic consumer demand.

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; PSA 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 PSA 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.

PSA. PSA trades at a trailing P/E of roughly 32x, above its own 3-year average of approximately 25x to 27x and above the broader real estate sector average, reflecting the market's expectation that the NSA acquisition and the PS4.0 platform will reaccelerate growth. For REITs, Core FFO per share is the most widely watched profitability metric; PSA's 2025 Core FFO of $16.97 reached the high end of guidance and grew 1.8% year over year, while 2026 guidance of $16.35 to $17.00 implies flat to modestly positive growth. The GAAP payout ratio exceeds 100% of net income, which is normal for REITs given depreciation charges, but the ratio relative to Core FFO is the more relevant measure of dividend coverage.

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); PSA shows revenue (ttm) ~$4.85 billion, full-year 2025 revenue ~$4.82 billion, net income (fy 2025) ~$1.78 billion, core ffo per share (fy 2025) ~$16.97.

AMT and PSA 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 PSA exposure against your real portfolio. It is not an investment adviser.