CompanyEnterpriseHardware
Zayo Group
Zayo Group is a Denver-based communications infrastructure company that owns and operates one of North America and Europe's largest fiber-optic networks - over 150,000 route miles after its 2026 acquisition of Crown Castle's fiber business. It sells the physical layer of the internet: dark fiber, wavelengths, Ethernet, IP transit, dedicated internet access, colocation and managed edge services to wireless carriers, hyperscalers, enterprises, governments and ISPs. Founded in 2007 on a contrarian bet that bandwidth demand would only explode, Zayo has spent its life buying and building fiber, and is now positioning that network as the backbone for AI workloads moving data between data centers.
2007Founded
DenverHQ
$2.37 billionAsset-backed term notes
fiberdark fiberfiber optic networklong-haul fibermetro fiberwavelengths