CoreSite
Colocation and interconnection data center operator, owned by American Tower.
On the record
Checkpoint: American Tower Q2 2026 earnings call covering Data Centers segment growth and DISH litigation impact
The call
CoreSite keeps growing on the back of American Tower's capital while Equinix stays much larger and Denver's permit freeze tests whether local pushback spreads to other metros.
CoreSite operates data centers across major US cities where companies connect their computer networks together. It is hard to copy because it owns physical buildings with special permits in crowded areas and has already built thousands of connection points between companies, but Equinix is much bigger with twice as many connection points, and newer competitors like Applied Digital and Vantage are building data centers designed specifically for artificial intelligence companies. The biggest thing that could change everything is whether cities keep blocking new data centers due to noise and power concerns, starting with Denver's ban in May 2026.
Why
01
AI pressure: Applied Digital, Vantage Data Centers (AI-native, purpose-built high-density builders). AI workloads need extreme power density that older colocation buildings retrofit slowly, letting purpose-built rivals grab new AI tenants first. Could AI do the core job? Unlikely.
02
Bigger players: Equinix. Equinix has 260+ data centers and over 507,000 cross-connects, more than double CoreSite's network, pulling bigger interconnection deals. Could a giant copy it? Probably.
03
What protects it. Physical cross-connects, carrier-neutral peering, and Google Gold Verified Peering status lock in customers already wired into its buildings.
What would change this call
Denver moratorium renewal or expansion decision before May 2027. Shows whether permitting backlash spreads and constrains CoreSite's build pipeline.
American Tower Q2 2026 earnings (July 28, 2026) Data Centers segment growth rate. Reveals if DISH litigation costs are diverting capital away from CoreSite expansion.
CoreSite DE3 Denver facility occupancy ramp through 2026. Tests whether CoreSite is winning or losing high-density AI tenants versus Equinix/Vantage.
American Tower Q2 2026 earnings (July 28, 2026) Data Centers segment growth rate. Reveals if DISH litigation costs are diverting capital away from CoreSite expansion.
CoreSite DE3 Denver facility occupancy ramp through 2026. Tests whether CoreSite is winning or losing high-density AI tenants versus Equinix/Vantage.
Key numbers
- Data Centers segment revenue $289M, +18% YoY
- American Tower 2026 discretionary capex ~$1.8B
- Denver DE3 expansion halted, 600,000 sq-ft campus plan
Named risks
- Denver one-year permit moratorium (May 2026) halts two planned CoreSite buildings and could spread to other metros.
- American Tower's ~$2B DISH litigation and bankruptcy proceedings could divert parent capital from CoreSite pipeline.
- Sub-scale AI-density retrofit pace versus Equinix, Applied Digital, and Vantage risks losing high-value AI tenancy.
- Ongoing Denver noise and pollution complaints from residents could escalate regulatory or community backlash.
Rivals, as read in July 2026
| Rival | Direction | Evidence |
|---|---|---|
| Equinix | losing to | 507,000+ cross-connects vs CoreSite's est. 0.2% market share, as of 2026-04-30 |
| Digital Realty | losing to | 3,000 MW wholesale capacity across 300+ facilities dwarfs CoreSite scale, 2026-04-24 |
| Applied Digital | contesting | Racing to retrofit for AI-density workloads alongside CoreSite's DE3 build, 2025-2026 |
| Vantage Data Centers | contesting | Competing for AI-optimized high-density colocation tenancy through 2026 |
| QTS Realty Trust (Blackstone) | gaining on | Scaling hyperscale campuses in Ashburn, Richmond, Phoenix, Atlanta per 2026-04-30 report |
Questions people ask
- Is CoreSite profitable?
- CoreSite operates as American Tower's Data Centers segment, which posted $289M in property revenue for Q1 2026 versus $244M in Q1 2025, an 18% YoY increase, per American Tower's April 28, 2026 SEC filing. At its 2021 acquisition it ran ~$343M Adjusted EBITDA on ~$655M annualized revenue.
- Who owns CoreSite?
- CoreSite has been a wholly owned subsidiary of American Tower Corporation (NYSE: AMT) since American Tower acquired it for $170.00 per share in cash, a deal valued at roughly $10.1 billion including assumed debt, announced November 15, 2021.
- Could AI replace CoreSite's business?
- No. CoreSite's core product is physical colocation and carrier-neutral interconnection, cross-connects, peering, permitted power and real estate, which AI software cannot substitute. It earned Google Gold Verified Peering Provider status by July 8, 2026 and NVIDIA DGX-Ready certification in December 2024, reinforcing physical lock-in.
- Is Equinix a bigger threat than CoreSite can handle?
- Equinix operates 260+ IBX facilities with over 507,000 cross-connects, more than double its nearest competitor, versus CoreSite's estimated 0.2% US colocation market share as of an April 30, 2026 market report, making CoreSite a sub-scale contender rather than a category leader.
- What is the Denver data center moratorium and does it hurt CoreSite?
- Denver passed a one-year moratorium on new data center permits around May 19, 2026, halting two additional planned CoreSite buildings at its DE3 site, though the already-built DE3 facility is unaffected. Noise complaints from residents in Elyria-Swansea were still active as of July 21, 2026.
- Could American Tower's DISH litigation hurt CoreSite's growth?
- American Tower is pursuing roughly $2 billion in litigation against DISH Wireless over unpaid tower lease obligations amid DISH's bankruptcy, per a July 2, 2026 report. This primarily hits AMT's tower segment, but any material financial strain could affect capital allocated to CoreSite's development pipeline.
Timeline
- 2026-07-21Denver noise complaints against CoreSite DE3 site reported ongoing in Elyria-Swansea
- 2026-07-08CoreSite achieves Google Gold Verified Peering Provider status
- 2026-05-19Denver passes one-year moratorium on new data center permits, halts two CoreSite buildings
- 2026-04-28American Tower Q1 2026 filing shows Data Centers segment revenue at $289M, up from $244M
- 2026-02-24American Tower Q4 2025 call outlines $1.8B 2026 discretionary capex plan favoring CoreSite
- 2025-10-06CoreSite hits construction milestone on 180,000 sq-ft DE3 Denver data center
- 2024-12-19CoreSite earns NVIDIA DGX-Ready Data Center Program certification
- 2021-11-15American Tower announces $10.1B acquisition of CoreSite at $170.00 per share
- 2001CoreSite founded, originally as CRG West
Revision history
22 July 2026
First assessed. Defensible for now. The text above is fixed as of this date and is not edited afterwards.
In the same band
Sources
- American Tower to Acquire CoreSite (2021-11-15)
- American Tower Q1 2026 press release (2026-04-28)
- American Tower to Acquire CoreSite (2021-11-15)
- American Tower (AMT) Q4 2025 Earnings Transcript (2026-02-24)
- CoreSite Realty Number of Employees 2026 (2026-06-29)
- CoreSite - Headcount, Funding & Open Jobs (2026-06-22)
- CoreSite Achieves Key Construction Milestone for New DE3 Data Center in Denver (2025-10-06)
- Hybrid IT Now Dominates Enterprise Architecture (2026-07-08)
- Enabling New High-Density Use Cases with Existing Data Centers (2024-12-19)
- Denver Passes One Year Moratorium On Data Centers (2026-05-19)
- Denver data center generators draw noise complaints in Elyria-Swansea (2026-07-21)
- Equinix (US) and Digital Realty (US) are Leading Players