Nebius shares rise after Nvidia discloses it holds a stake in the AI cloud company. Multiple outlets report that Nvidia’s disclosure shows the company owns about 9.3% of Nebius. Quartz and other coverage point to a specific share count of roughly 22.26 million shares associated with the stake. CNBC also notes that Nvidia previously indicated it would invest $2 billion into Nebius, with that investment described as planned for March. The news comes amid a broader AI cloud sector pullback, but the reported trigger for Nebius’s move is the stake disclosure itself. Quartz reports Nebius stock is up about 7% in premarket trading Tuesday following the filing. Other sources similarly characterize the reaction as a sharp early gain tied to the updated ownership information. The articles do not cite additional changes to Nebius operations or guidance, focusing instead on the Nvidia filing, the size of the reported stake, and the company’s disclosed investment plan.