Nebius Stock: A 571% Revenue Jump Meets a $27 Billion Spending Bill

Nebius delivered one of the fastest growth spurts in the AI infrastructure space last quarter — and investors responded by knocking roughly 15% to 16% off the share price. The trigger wasn't the top line. It was the combination of a trimmed full-year revenue outlook and a sharply raised capital budget that put the company's execution under a harsher spotlight.

At the center of the selloff sits a single tension: Nebius now plans to spend far more while guiding to less revenue than it previously projected. For 2026, the company has lifted capital expenditure to approximately $27 billion, up from an earlier range of $20 billion to $25 billion. On the top line, management pointed to the lower end of its existing $3 billion to $3.4 billion annual revenue band — a range whose upper bound had previously stood at $3.4 billion.

A quarter that beat the Street

The third-quarter scorecard itself offered plenty of ammunition for the bulls. Revenue for Q3 2026 reached $980.8 million, a 571% jump year over year, and comfortably ahead of the $907.5 million consensus tracked by LSEG. Adjusted EBITDA came in at $465.8 million, while the net loss narrowed to $37.5 million from $119.6 million in the comparable quarter of 2025.

Those figures make the case that demand is real. What management flagged instead was the supply side of the equation: delays in bringing third-party capacity online are constraining how quickly that demand can be converted into booked revenue. Capacity availability, in other words, has become the swing factor for anyone trying to value the growth story.

The spending curve steepens

If the 2026 capex number raised eyebrows, the 2027 guidance raised them further. Nebius outlined spending of $40 billion to $45 billion for that year, alongside a first revenue outlook of $12 billion to $13 billion. The implied growth is enormous — but so is the capital required to chase it, and that is precisely where the market's skepticism took root.

The two signals pull in opposite directions. Higher outlays are being committed at the same moment that expected revenue is being capped by capacity delays. As long as the spending and the available infrastructure run on different timelines, the valuation absorbs the strain, and execution becomes the yardstick investors apply to every subsequent update.

Nvidia jitters add fuel

Nebius wasn't moving in isolation. The broader AI complex came under pressure as turbulence around Nvidia and concerns about how the industry finances its infrastructure build-out weighed on sentiment. Reuters reported that remarks from Nvidia CEO Jensen Huang shook AI-related stocks, with worries about the sector's dependence on Nvidia-linked financing adding to the gloom.

That backdrop matters for Nebius specifically because its own roadmap carries such a heavy funding requirement. The day's larger theme, then, is a stricter market test for the AI build-out: growth only earns a premium when capacity and financing keep pace with one another.

What would change the verdict

For the bullish case to hold, the recent revenue beat needs to extend into coming quarters while guidance stays intact. Continued improvement on the bottom line would reinforce that argument; a fresh rise in losses would sharpen the question of whether the enlarged capital program can be justified economically.

The bearish risk runs through the same intersection of rising outlays and demanding revenue expectations. A further disappointment on the revenue path would carry extra weight while the elevated spending plan remains in place — and the cautious framing of the current annual outlook already marks where that sensitivity lives. The next real catalyst is more clarity on how revenue and investment actually track, above all whether Nebius can stand behind its first outlook for the coming year.