Zayo Group
Zayo builds and leases long-haul and metro fiber networks for carriers, cloud, and AI data centers.
On the record
Checkpoint: CEO handoff to Sowmyanarayan Sampath during Crown Castle Fiber Solutions integration
The call
Zayo's fiber is hard to replace and AI traffic is growing its business, but it carries heavy debt while its biggest customers experiment with building their own lines instead of leasing.
Zayo owns and leases fiber optic cables that carry data across North America, with long-term contracts and legal rights to use physical routes that took years to build. It is hard to copy because laying new fiber cables underground costs billions of dollars and takes years of permits. However, Zayo's biggest customers, Amazon, Google, and Microsoft, are increasingly building and owning their own private fiber networks instead of paying Zayo to lease capacity. The company also borrowed over $6 billion to buy another fiber company (Crown Castle) and is led by a new CEO starting in 2026, while its debt payments stretch out to 2030. The one thing that could change everything is whether those tech giants stop leasing from Zayo and instead use only their own cables, which would shrink Zayo's revenue and make it harder to pay its debt.
Why
01
AI pressure: None apparent. AI is a tailwind here, not a predator: rising AI data center traffic drives demand for the fiber routes Zayo leases out. Could AI do the core job? Unlikely.
02
Bigger players: Google, Meta, Amazon, Microsoft (hyperscaler self-built dark fiber). Zayo's biggest customers are the same hyperscalers now laying their own dark fiber for AI campuses, cutting future need to lease. Could a giant copy it? No, they are blocked.
03
What protects it. 224,000 route miles, rights-of-way, and multi-year contracts that took decades and billions to lay down and can't be copied fast.
What would change this call
Google, Meta, AWS, or Microsoft announces cutting leased long-haul capacity in favor of owned dark fiber at scale. Would show hyperscaler build-vs-buy shift is displacing Zayo's largest customer segment.
Crown Castle Fiber Solutions integration milestones through 2027 under new CEO Sowmyanarayan Sampath (effective Sept 2026). Would show whether leadership transition and largest-ever acquisition are executed without margin or customer disruption.
Identity and status of the unnamed May 2026 anchor AI customer's 8,000 route-mile deal becomes public. Would show whether Zayo's flagship AI capacity deal is real, durable, and not overstated.
Crown Castle Fiber Solutions integration milestones through 2027 under new CEO Sowmyanarayan Sampath (effective Sept 2026). Would show whether leadership transition and largest-ever acquisition are executed without margin or customer disruption.
Identity and status of the unnamed May 2026 anchor AI customer's 8,000 route-mile deal becomes public. Would show whether Zayo's flagship AI capacity deal is real, durable, and not overstated.
Key numbers
- $14.3B EQT/Digital Colony take-private deal
- 224,000 North American route miles
- $1B AI deals booked 2024, $3B pipeline
Named risks
- Hyperscaler customers shifting from leasing to owning dark fiber, eroding largest revenue segment.
- Heavy leverage with over 6 billion dollars in ABS and reliance on refinancing amid rate risk.
- Crown Castle integration execution risk during simultaneous CEO transition.
- Unnamed anchor AI customer deal terms undisclosed, could unravel.
- Conflicting headcount data across sources creates uncertainty in workforce trend.
Rivals, as read in July 2026
| Rival | Direction | Evidence |
|---|---|---|
| Lumen Technologies | losing to | Lumen ranked #1, Zayo #2 on Vertical Systems Group 2024 U.S. Wavelength leaderboard, per March 2025 report |
| AT&T | contesting | Both on Wavelength and Ethernet leaderboards amid 2026 sector consolidation reshuffling rankings |
| Verizon | contesting | Verizon expanding fiber footprint via completed Frontier acquisition, noted Feb 2026 |
| Crown Castle | gaining on | Zayo and EQT acquired Crown Castle's fiber and small cells businesses, closed May 1, 2026, removing it as independent rival |
| Hyperscalers (AWS, Google, Microsoft) | losing to | Hyperscalers increasingly building own dark fiber instead of leasing, per Nov 2025 reporting |
Questions people ask
- Is Zayo Group profitable in 2026?
- Zayo does not publicly disclose profitability as a private company. Its last confirmed audited revenue was about 2.58 billion dollars in 2019. It carries over 6 billion dollars in asset backed securitizations as of April 2026, indicating a heavily leveraged capital structure rather than confirmed net profit.
- Who owns Zayo Group?
- Zayo has been privately owned since March 9, 2020, when EQT Infrastructure IV and Digital Colony Partners, now DigitalBridge, completed a 14.3 billion dollar take private acquisition, at the time the largest syndicated private equity investment and second largest leveraged buyout since 2008.
- Could AI replace Zayo Group's business?
- No. Zayo's core asset is physical fiber, 224,000 North American route miles as of May 1, 2026, plus rights of way and long-term contracts. AI cannot replicate physical infrastructure; instead AI driven data center demand is a direct tailwind, with over 1 billion dollars in AI related deals booked in 2024 alone.
- Who is Zayo Group's biggest competitor?
- Lumen Technologies ranked number 1 on Vertical Systems Group's 2024 U.S. Wavelength Services leaderboard with roughly 340,000 to 400,000 route miles, while Zayo ranked number 2, per Lightwave reporting from March 23, 2025. AT&T and Verizon are also established oligopoly peers.
- Did Zayo Group complete the Crown Castle acquisition?
- Yes. Zayo completed its acquisition of Crown Castle's Fiber Solutions business on May 1, 2026, an 8.5 billion dollar combined deal with EQT's parallel purchase of Crown Castle's Small Cells unit, adding about 90,000 metro route miles and becoming Zayo's 50th and largest deal.
- Is Zayo Group getting a new CEO?
- Yes. On July 14, 2026, Zayo announced that Sowmyanarayan Sampath, a former Verizon executive, will become CEO effective September 1, 2026, succeeding Steve Smith, who is retiring from the role but remaining on the board.
Timeline
- 2026-07-14Zayo announces CEO transition, Sowmyanarayan Sampath to replace Steve Smith effective Sept 1, 2026
- 2026-05-21Zayo secures unnamed anchor AI customer for 8,000 additional long-haul route miles
- 2026-05-01Zayo completes Crown Castle Fiber Solutions acquisition, network reaches 224,000 route miles
- 2026-04-24Zayo issues 2.37 billion dollars of asset backed term notes
- 2025-06-24Zayo publishes bandwidth report citing 330 percent data center bandwidth surge 2020 to 2024
- 2025-03-13Zayo announces agreement to acquire Crown Castle's Fiber Solutions business
- 2025-01-21Zayo announces plan to build 5,000 plus new fiber route miles for AI demand
- 2024-05-13Zayo carves out Zayo Europe as a standalone entity
- 2020-03-09Zayo completes 14.3 billion dollar take private transaction with EQT and Digital Colony
Revision history
22 July 2026
First assessed. Protection under test. The text above is fixed as of this date and is not edited afterwards.
In the same band
Sources
- Zayo Completes Transition to a Private Company (2020-03-09)
- Zayo carves out European business to create standalone company (2024-05-13)
- Zayo Completes Acquisition of Crown Castle's Fiber Solutions Business (2026-05-01)
- Zayo to Acquire Crown Castle's Fiber Solutions Business (2025-03-13)
- Zayo Announces Construction of 5000 New Fiber Route Miles (2025-01-21)
- Zayo Secures Anchor Customer to Accelerate Network Expansion Across Critical AI Corridors (2026-05-21)
- Zayo Bandwidth Customers (2025-06-27)
- Exploding Data Consumption Signals New Era for Fiber Infrastructure (2025-06-24)
- 2025: A Year in the Life of a Newly Independent European Company (2025-12-30)
- Zayo Group LLC Employees (2026-06-29)
- Zayo Group Holdings Employees (2026-06-29)
- Intelligent Fiber Network (Crustdata) (2026-06-30)