What happened
Microsoft ended a planned agreement to take space in Nscale's first UK data center in Loughton, Essex, according to the British neocloud company, with the move initially reported by the Telegraph. Nscale did not cite a reason for Microsoft's decision, though the Loughton project has faced delays tied to electricity availability.
Nscale said by email, "We remain committed to both the Loughton project and the UK and we are exploring alternative power sources for the site, in addition to other expansion sites in the UK." The company added, "Our relationship with Microsoft remains strong and long-term, and this unfortunate London-wide grid issue has no impact on our other contracts."
The buildout and the numbers
Nscale's main facility in Norway is running behind by about half a year, and Bloomberg has reported that 6.4 MW is operating out of a 30 MW target. According to its IPO filing, around 85% of the company's contract base is with Microsoft and Anthropic, and Microsoft had been slated as the anchor tenant at the Essex site.
The company is seeking up to $3 billion through an offering that might land as early as this month. That push comes as investors reassess risks around the broader AI infrastructure boom.
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Sector backdrop
Nscale is part of the neocloud cohort building massive computing campuses for AI, aiming to capture a share of the hundreds of billions big tech has committed to invest in the technology. These firms sit in the middle of the AI buildout's supply chain.
The mood has cooled. CoreWeave's co-founder said last week the company is evaluating options to borrow in investment grade credit markets, where insurers provide deep pools of capital. Investors had already turned cautious on AI compute suppliers as they and their customers take on tens of billions in debt to expand capacity.
CoreWeave shares dropped during the week's opening three trading days, bounced a bit, then fell again on Friday, ending down 25% for the worst week since November. Separately, Australia's Firmus canceled its IPO after it could not secure enough demand at the marketed price.
What this means for your portfolio
Customer concentration and construction risk are front and center. A key tenant stepping back while a flagship site lags and power is tight is the kind of trio that can sway IPO pricing, timelines, and contract terms across neocloud names. If you have exposure to AI data center plays, track who the anchor customers are, how quickly megawatts are coming online, and how much balance sheets are leaning on new borrowing.
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