Microsoft Tightens Neocloud Oversight, Nebius and IREN Fall 13 Percent

Microsoft is tightening its oversight of data center projects run by the neocloud companies Nebius, IREN and Nscale, Bloomberg News reported on Thursday, November 5, 2026, citing people familiar with the matter. Shares of the exposed companies fell hard in afternoon trading in New York. Nebius and IREN each fell more than 13 percent, and CoreWeave fell 11 percent, Reuters reported.

Bloomberg reported that Microsoft is stepping away from projects it judges risky and is debating internally whether to sign new neocloud deals at all. The company is focused on expanding its own data centers rather than adding outside deals, though it has not fully ruled new deals out, the report said. Microsoft, Nebius, IREN and Nscale did not immediately respond to Reuters requests for comment.

The Texas problems

The most concrete pullback is at Nscale. Microsoft will not exercise an option to more than double the size of its existing agreement to rent computing power at a data center in Texas, Bloomberg reported. At IREN, some of Microsoft's capacity concerns centre on cabling at a site in Texas, and the two companies met last week and negotiated a revised timeline that could push completion back by several weeks or months, according to the same reporting, summarised by TipRanks.

IREN's Texas site is Childress, where the company holds a five year, 9.7 billion dollar agreement to supply Microsoft with AI computing power, PRISM MarketView reported. A report from The Information on November 4 said delays at Childress had led Microsoft to push back data center spending it had planned for the September quarter, and IREN reports its quarterly results after the close on Thursday, which put the stock under still more pressure.

Why it matters

Neoclouds rent out AI computing power. They have borrowed heavily to build data centers and buy chips, and their business plans rest on a small number of very large customers. Microsoft is the anchor customer that makes many of those plans bankable. When the anchor customer tightens oversight, walks away from an expansion option and debates whether to sign any new deals, lenders and investors reprice the whole sector at once. That is what Thursday afternoon looked like. The falls were not limited to the three named companies. CoreWeave, which was not named in the Bloomberg report, fell 11 percent in the same trading.

The report also lands in a wider selloff in technology shares on Thursday, tied in part to worries that a new Democratic Congress could slow AI infrastructure buildouts, Reuters reported in its market coverage. The neocloud falls were still sharper than the broader market, which points to the Microsoft report itself, not only the political backdrop.

What happens next

Microsoft has not announced an end to its neocloud relationships, and the internal debate over new contracts is unresolved, the reporting said. The near term tests are practical. IREN has to show, in its results and on its call on Thursday evening, that the Childress timeline is under control. Nebius and Nscale have to show that their Microsoft work is still expanding, not shrinking. And Microsoft has to decide whether its own buildout can carry its AI plans without the outside capacity it spent the last two years signing up.