Microsoft exits Nscale UK data centre deal ahead of planned $3B IPO

The report intensifies pressure on AI infrastructure stocks already facing scrutiny, as CoreWeave's sharp weekly decline shows investors are increasingly penalizing debt-heavy expansions. Nscale may be compelled to adopt a more conservative IPO pricing strategy or postpone the offering, while other companies seeking capital could encounter a tighter fundraising environment. For the energy sector, this development reinforces the notion that grid capacity, rather than chips, is emerging as the key limiting factor for data centre growth. That bolsters the case for utilities, independent power producers, and gas-fired generation tied to data centre demand. For Microsoft, the decision reflects capital discipline rather than a pullback from AI investment.

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Earlier:

• Only a third of the US data centre pipeline looks credible as AI financing strains build

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Nscale has lost its anchor tenant in Essex not due to a lack of AI demand but because of insufficient electricity supply—a costly lesson just days before seeking $3 billion from investors.

Summary:

• Microsoft has withdrawn from an agreement to serve as the anchor tenant for Nscale's first UK data centre in Loughton, Essex, as reported by the Telegraph
• No official reason was provided, but the site reportedly faces power connection delays that could stretch into the 2030s
• Nscale asserts that its relationship with Microsoft remains solid and is investigating alternative power sources and other UK locations
• Microsoft and Anthropic together represent roughly 85% of Nscale's contracts, according to its IPO filing
• Nscale aims to raise up to $3 billion through an IPO, potentially as early as October
• Sentiment toward neoclouds has deteriorated, with CoreWeave dropping 25% last week and Australia's Firmus calling off its IPO

According to a Telegraph report, Microsoft has exited a deal to anchor Nscale's inaugural British data centre, a setback for the AI infrastructure firm as it gears up for a listing that could generate as much as $3 billion, possibly within this month.

Microsoft was anticipated to be the primary customer at the planned Loughton, Essex facility. The reasons for the withdrawal have not been made public, and Microsoft declined to comment on the report, which Bloomberg picked up on Sunday. Nonetheless, the project has faced persistent delays, and local authorities have reportedly cautioned Nscale that a grid power connection might not be available until the next decade.

Nscale indicated that its partnership with Microsoft remains robust and long-term, and that the power issues in Essex will not impact its other agreements. The company stated it is examining alternative power options and additional UK sites.

The timing proves inopportune. Nscale's IPO filing reveals that Microsoft and Anthropic collectively account for approximately 85% of its contracts, leaving the firm highly dependent on just two clients. Anthropic committed in August to spend $45 billion on Nscale computing capacity over six years, and Microsoft has inked a letter of intent for a campus in West Virginia, so the Essex exit does not sever the relationship. However, it strips an anchor tenant from a flagship project precisely as investors scrutinize the company's growth narrative.

Execution delays have also surfaced elsewhere. Nscale's main facility in Norway is reportedly running about six months behind schedule, with only just over 6 MW of a planned 30 MW operational.

This setback arrives as investor sentiment toward so-called neoclouds—specialized providers that lease AI computing capacity and frequently rely on heavy borrowing to finance construction—turns more wary. CoreWeave's shares plunged 25% last week, marking their steepest weekly decline since November, while Australian developer Firmus abandoned its planned listing after failing to attract sufficient investor interest at its desired valuation.

The situation also underscores a growing bottleneck in the AI expansion: electricity access. Demand for data centre capacity stays robust, but projects unable to obtain timely grid connections risk losing clients no matter how much hyperscalers intend to spend.

Nscale's IPO pricing will now serve as a gauge of whether investors view the Essex setback as an isolated power issue or as a signal of broader execution risks across the sector.