American Tower surged on Friday, October 9, in a move investors tied less to company-specific headlines and more to SpaceX.

On Thursday, October 8, SpaceX agreed to acquire Grain Management’s nationwide 800 MHz spectrum portfolio for roughly $8 billion in cash, subject to regulatory approval. Investors drew a direct line: spectrum in hand, SpaceX now has the raw material to build a terrestrial wireless network, and building that network could mean leasing space on towers already owned by American Tower, Crown Castle, and SBA Communications. Tower stocks broadly jumped on the read-through.

The logic is straightforward, if not yet confirmed. Tower REITs collect rent from tenants under long leases. They get paid by whoever wins customers, which is exactly what Wells Fargo analyst Steven Cahall argued in September when he said SpaceX’s wireless push could hurt carriers more than tower owners. Carrier stocks slid sharply on Friday, with T-Mobile, AT&T, and Verizon all posting steep declines. The market treated the incumbents as the likely losers and the infrastructure beneath them as the potential winner.

Bernstein went further, arguing that a standalone wireless network capable of competing nationally would still require substantial ground-based spending, given that satellites provide coverage but not the capacity density that urban markets demand. SpaceX has not committed to a ground-network rollout, and a satellite-first strategy could reduce its dependence on terrestrial infrastructure. That is the risk. It is a real one.

The investment case for American Tower does not require SpaceX to become a tower tenant, though. It already stands on its own. AMT operates nearly 149,000 communications sites globally, including a growing U.S. data center segment through CoreSite. In Q2 2026, total property revenue was $2.688 billion. The company raised its full-year AFFO guidance to $11.00 to $11.17 per share after Q2, citing data center outperformance among the drivers. Barclays raised its price target to $199 and carries an Overweight rating, citing edge computing growth at tower sites.

The demand story for towers depends partly on how aggressively SpaceX pursues terrestrial expansion. SpaceX’s Starship milestone that sent 26 Starlink V3 satellites to orbit signals how quickly the company’s infrastructure ambitions are compounding.

Q3 earnings land October 27. Management has scheduled the release for 7:00 a.m. ET that Tuesday.

What Could Go Wrong

Interest rates remain the structural headwind for any REIT. AMT carries meaningful leverage, and churn from carrier consolidation has pressured U.S. tower leasing growth for years. SpaceX could also decide it does not need traditional towers at all, which would deflate Friday’s thesis without warning.

Carrier consolidation is the other side of that pressure. Verizon’s Frontier acquisition reshaped how the largest U.S. carrier is allocating fiber and wireless capital, which feeds directly into the leasing decisions that determine tower revenue growth.

The valuation is not cheap by REIT standards, and expectations can reset quickly if rates move higher or if leasing momentum disappoints.

The Bottom Line

The SpaceX spectrum deal handed American Tower an entirely new demand story at precisely the moment earnings are approaching. A fourth potential tenant changes the ceiling on this business, not just the floor. Even if SpaceX never becomes a meaningful tenant, the market is signaling that incremental wireless demand, from whoever captures it, is what matters most for towers. That makes the earnings date on October 27 worth watching closely.