The transaction is structured as a sale-and-service-back agreement, with Imagination continuing to operate from the facility as a managed customer. The site has been designed to support high-performance workloads, including GPU and AI chip development.
The deal brings Stellanor’s platform to 11 facilities nationwide, with a combined 39 MVA of secured grid capacity. The company has scaled rapidly since launching in September 2025 with two London sites acquired from Colt Technology Services, highlighting strong momentum in the UK colocation market.
Chairman Michael Tobin said the acquisition reflects demand from enterprise and technology customers requiring resilient, well-connected infrastructure close to operational hubs. He pointed to AI and high-performance computing as growing drivers, alongside continued demand for core enterprise workloads.
Imagination Technologies, known for its work in GPU and AI chip design, will retain a long-term presence at the site.
CEO Markus Mosen said maintaining resilient infrastructure is critical to supporting ongoing innovation, with the partnership providing scalable capacity while allowing the company to focus on its core technology roadmap.
The Hemel Hempstead facility illustrates a broader trend in the market. While AI workloads are shaping new infrastructure requirements, much of the demand remains rooted in enterprise needs for connectivity, resilience and proximity to users and operations.
The acquisition is backed by DWS, which is supporting Stellanor’s expansion strategy. The company is also in the process of acquiring eight UK data centres from Redcentric, a deal expected to complete in the coming months.
Taken together, the expansion points to sustained demand for urban colocation capacity, as enterprises balance traditional IT requirements with the growing need to support AI and cloud-based workloads closer to the edge.
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