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Both companies sell AI cloud infrastructure to developers and businesses that need lots of GPU power for training and running models. Nebius focuses on full-stack AI cloud services, and CoreWeave says it sells access to AI infrastructure cloud services under committed and on-demand contracts, so they are fighting for the same kind of customers and projects.
As of May 4, 2026
For informational purposes only.
Nebius jumps 14% today as investors cheer its big AI deal and hype up next week’s earnings. The move extends a huge recent run, but it also raises the bar: the company now has to prove that all this spending and the new acquisition really turn into durable, profitable business.
Nebius (NBIS) closed around $176, up about 14% on the day. Trading volume was noticeably heavier than usual, which means a lot more shares changed hands than on a normal day.
The stock traded in a wide range but finished near the top of that range and just under its recent high, suggesting buyers were in control for most of the session. The broader market was a bit soft, so this wasn’t just “everything went up”; this was Nebius-specific enthusiasm.
Over the last 1–2 months the stock has already more than doubled, so today’s pop is happening on top of a big existing rally.
1. The $643M Eigen AI deal lit up the story.
Nebius is buying Eigen AI in a roughly $643 million cash-and-stock deal. Think of Nebius as the company renting out powerful computers, and Eigen as a specialist that helps run AI models on those computers faster and cheaper.
