American Tower Corporation

▲ Bull Case

• ◆DISH laps Q1 2027 + 5G densification begins H2 2026: U.S. organic billings re-accelerates to 6-7%; market re-rates to 20x P/AFFO; stock reaches $230-250 (+41-47%)
• ◆CoreSite achieves standalone data center recognition: At 22x EBITDA ($1.1B+), CoreSite alone is worth $24B — 28% of AMT's current $86B EV. Any spin-off speculation, SOTP analyst coverage, or activist pressure closes the 6-9x multiple gap and adds $14-52/share
• ◆Rate cuts 100-200bps: Infrastructure REITs broadly re-rate; AMT's 3.8% dividend becomes significantly more attractive vs. falling Treasuries; 200bps of cuts = ~2-3 turns of P/AFFO expansion

▼ Bear Case

• ◆U.S. structural decline: 5G densification next wave delayed to 2030+; U.S. carrier capex structurally constrained; normalized organic growth stays at 2-3% (not 5-7%); AFFO growth flattens; P/AFFO stays at 13-15x → stock at $140-155 (-14%)
• ◆Rate headwinds accumulate: 10-year Treasury 5.5%+; $10-15B in maturing debt refinanced at 5-6% (vs. 4.2% blended); annual AFFO compressed by $100-200M; P/AFFO multiple stays compressed; DISH lap = narrative catalyst that fails to re-rate
• ◆CoreSite AI demand cycle reverses: Hyperscaler capex pullback; 200 MW development pipeline fill rate disappoints; CoreSite EBITDA growth drops to 5-8%; the second growth engine fails to materialize

“The central debate is: 'Is the 2026 U.S. growth trough finite (DISH) or structural (5G build-out complete)?' Bulls argue AT&T, Verizon, and T-Mobile still need to densify mid-band 5G (arriving 2027-2028); bears argue carriers have largely satisfied near-term coverage commitments and the next cycle is uncertain in timing and magnitude. The DISH churn lap is not debated — both sides agree it vanishes Q1 2027. The disagreement is whether normalized U.S. organic growth post-lap is 4-5% (bulls) or 2-3% (bears). Secondary debate: 'Is CoreSite worth more inside AMT or as a standalone?' If separately listed at data center multiples, CoreSite would be worth $22-28B vs. the $15-16B implied at AMT's blended tower multiple. The embedded discount is real; the catalyst to close it is unclear.”

• ◆CAT-01: DISH churn lap — U.S. organic billings re-accelerates visibly | Q1 2027 | HIGH probability (certainty) | +400bps organic → +$0.80-1.00/share AFFO
• ◆CAT-02: 5G densification next wave — carriers announce mid-band densification spending | H2 2026-H1 2027 | MEDIUM probability | +2pp organic growth; +$0.40-0.60/share AFFO
• ◆CAT-03: CoreSite re-rating catalyst — analyst SOTP coverage, spin-off speculation, or activist | 2026-2027 | MEDIUM-LOW probability | +$14-52/share if data center multiples applied
• ◆CAT-04: Fed rate cuts 100-200bps | 2026-2027 | MEDIUM probability | P/AFFO expansion +2-3 turns = +$24-35/share
• ◆CAT-05: SBAC going private — scarcity premium for tower REITs | 2027+ | LOW probability | +1-2 turns P/AFFO premium

• ◆R-01: U.S. organic billings growth fails to recover post-DISH (structural) | MEDIUM (30%) probability | HIGH impact | Monitor Q1 2027 U.S. organic billings rate — critical data point
• ◆R-02: Interest rate headwinds — refinancing at higher rates on $3-4B/yr maturing debt | HIGH (60%) probability | MEDIUM impact | Monitor AMT debt maturity schedule and quarterly interest expense
• ◆R-03: Africa/LatAm FX headwinds (USD strength) | MEDIUM-HIGH (50%) probability | MEDIUM impact | Monitor USD/NGN, USD/BRL, USD/MXN and DXY index
• ◆R-04: CoreSite AI demand cycle reversal | MEDIUM (30%) probability | MEDIUM impact | Monitor hyperscaler capex guidance and CoreSite quarterly occupancy/lease-up
• ◆R-05: Carrier consolidation reduces tower tenants/tower to <3 national U.S. tenants | LOW (10%) probability | HIGH impact | Monitor U.S. carrier M&A activity and DISH spectrum outcome