Kao Data
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Kao Data is a UK-based colocation developer and operator that has built its brand specifically around high-density, AI- and HPC-ready data centre space, rather than general-purpose enterprise colocation. As of 2026 the company operates three live sites in the London area — a four-building campus in Harlow (KLON-01 through the newly built KLON-03, with a fourth planned), a facility in Slough (KLON-06), and a smaller Northolt site (KLON-05) — plus a 40MW campus under construction in Stockport, Greater Manchester (KMAN-01). Its Harlow campus houses Nvidia’s Cambridge-1 supercomputer and, more recently, a 22MW, 10-year deal with AI cloud provider Nebius, and its newest Harlow building, KLON-03, is purpose-built with direct-to-chip liquid cooling for GPU-accelerated workloads. Founded in 2014/2015 and named after fibre-optics pioneer Sir Charles Kao — whose original discovery took place on the Harlow site — the company is majority-owned by New Zealand infrastructure investor Infratil, alongside Legal & General Capital and founding investor Goldacre Noé Group.
Kao Data has a confirmed data center presence at the following locations:
FACILITY OPERATOR
Phone: +44 (0)1279 937400 Email: [email protected]
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Kao Data Data Center Locations
- Stockport, UK KMAN-01 PENDING REVIEW
Located at Kenwood Point in Reddish, Stockport, this £350m, 40MW facility is planned to be Northern England's largest data centre and Kao Data's first outside the London area. - Harlow, UK KLON-01 CARRIER-NEUTRAL PENDING REVIEW
This building, the first on Kao Data's Harlow campus, houses Nvidia's Cambridge-1 supercomputer, described as the UK's most powerful at the time of its deployment. - Harlow, UK KLON-02 CARRIER-NEUTRAL PENDING REVIEW
KLON-02 is a 10MW building completed in late 2023 as the second phase of Kao Data's original four-building Harlow master plan. - Harlow, UK KLON-03 CARRIER-NEUTRAL PENDING REVIEW
KLON-03 was announced in 2025 as one of the largest allocations of liquid-cooled compute capacity in the Greater London region, with Technology Suites supporting rack densities up to 130kW. - Northolt, UK KLON-05 TIER III CARRIER-NEUTRAL PENDING REVIEW
The Northolt site, inside the M25 near Heathrow, is a smaller 4MW facility described as fully occupied. - Slough, UK KLON-06 TIER III CARRIER-NEUTRAL PENDING REVIEW
Located on Slough Trading Estate within the connectivity-rich West London Availability Zone, KLON-06 has been expanded in multiple phases, including a Phase 4 build adding a 1.5MW N+1 data hall.
By Continent
Common Questions
Does Kao Data offer AI/GPU-specific infrastructure?
Yes. Kao Data's Harlow campus houses Nvidia's Cambridge-1 supercomputer in its original building, and its newer KLON-03 building is a purpose-built, 17.6MW facility with direct-to-chip liquid cooling and hybrid hot-aisle containment designed for GPU-accelerated AI training and inference workloads, supporting rack densities up to 130kW.
How many data centres does Kao Data operate?
As of 2026, Kao Data has facilities in Harlow (KLON-01, KLON-02, and the newly built KLON-03, with a fourth building planned), Slough (KLON-06), and Northolt (KLON-05), plus a 40MW campus under construction in Stockport, Greater Manchester (KMAN-01).
Who owns Kao Data?
As of late 2023, New Zealand-listed infrastructure investor Infratil holds a 53% majority stake, Legal & General Capital holds 32%, and founding investor Goldacre Noé Group holds 15%.
What major AI customer has deployed at Kao Data's Harlow campus?
In 2026, AI cloud provider Nebius signed a 22MW, 10-year agreement to host its Nebius AI Cloud platform and Token Factory inference service within Kao Data's Harlow campus.
Does Kao Data offer colocation services?
Yes — we've identified 6 facilities where Kao Data may offer colocation services. Please contact Kao Data directly to confirm current availability and terms.
Does Kao Data offer cloud services?
We haven't confirmed cloud services for Kao Data yet — this isn't a definitive no, since our research can miss things. Please contact Kao Data directly to confirm cloud availability.
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