Microsoft Withdraws from Nscale's UK AI Project, Hitting $35B IPO Plans

Microsoft has withdrawn from a major artificial intelligence data center project in Britain after electricity connection delays pushed the site's expected power availability into the 2030s, dealing a setback to Nvidia-backed Nscale ahead of its planned U.S. stock market listing.

The technology giant was expected to become the anchor customer at Nscale's Loughton campus in Essex, which had been promoted as Britain's largest AI supercomputer. The original plan called for approximately 23,040 Nvidia GPUs and 50 megawatts of computing capacity, expandable to 90 megawatts.

The withdrawal could complicate Nscale's ambitions to secure an IPO valuation reaching $35 billion, although the company says its wider partnership with Microsoft remains intact.

Nscale and Microsoft originally announced the Loughton development in September 2025, positioning the facility within Britain's broader investment push into artificial intelligence.

Under the original announcement, the project was scheduled to receive its Nvidia GB300 processors in early 2027, providing computing services for Microsoft's Azure cloud platform.

However, the local electricity network has struggled to guarantee sufficient power. Grid connection delays reportedly mean the facility may not receive its required electricity supply until the early-to-mid 2030s.

Microsoft confirmed the decision in an October 19 statement reported by Reuters, emphasizing that the cancellation concerns one location rather than its broader relationship with Nscale.

The company continues working with Nscale on other infrastructure projects across Europe and the United States.

Nscale also stated that it remains committed to Loughton and is exploring alternative power supplies, although it has not announced a replacement anchor customer.

The episode illustrates the central challenge behind the AI infrastructure boom: securing customers and funding does not guarantee that a facility can obtain electricity when needed.

The timing is particularly sensitive because Nscale has filed to list on the New York Stock Exchange under the proposed ticker NSCL.

The company reported $140.6 million in revenue during the first half of 2026, alongside a net loss of approximately $1.02 billion.

Its IPO filing also disclosed more than $103 billion in active and contracted total contract value as of August, reflecting enormous expectations for future computing demand.

That figure represents multiyear contractual commitments, not revenue already collected. Delivering the promised services requires completed data centers, installed hardware and dependable electricity supplies.

Reports have placed Nscale's potential IPO valuation as high as $35 billion, although Reuters has also cited an approximately $30 billion target. Investors have reportedly discussed lower valuations, and no final offering price has been established.

The withdrawal raises questions about whether Nscale can convert its enormous contract pipeline into predictable revenue quickly enough to justify its proposed valuation.

Importantly, losing the Loughton agreement does not mean Microsoft has canceled its entire multibillion-dollar relationship with Nscale.

Nscale's setback arrives during growing investor scrutiny of companies borrowing heavily to build AI infrastructure.

Fellow Nvidia-backed provider CoreWeave recently suffered a sharp stock decline, while yields on its 2031 bonds climbed above 16% amid concerns about financing requirements.

The two companies face different immediate problems: CoreWeave is dealing with deteriorating debt-market confidence, while Nscale has lost a prospective customer at a specific delayed facility.

Nevertheless, both highlight the challenge of financing expensive computing assets before they generate sufficient revenue.

The broader AI debt expansion depends on future customer payments supporting today's construction and equipment spending.