Nebius Stock: Prepayments Now Underwrite the Build, but the Clock Is Running

Nebius has raised its 2026 capital spending plan to roughly US$27 billion from a prior range of US$20–25 billion, and it wants customers to pick up most of the tab. Under the arrangement outlined by the company, customer prepayments and asset-backed financing are meant to cover 75%–85% of that outlay, with machinery and customer contracts serving as collateral. For 2027, Nebius has flagged investments of US$40–45 billion, again with prepayments and secured facilities expected to fund 75%–85% of the total.

The model got an early proof point in the third quarter: prepayments on contracts signed during the period covered more than 100% of the associated investments. That is a striking figure, and it explains why management treats advance payments as a financing pillar rather than a curiosity. The logic runs in a loop — win the contract, collect the cash, build the capacity — and it holds together only as long as the capacity arrives on schedule.

A $19.4 Billion Contract With a Deadline Attached

The Microsoft deal for the Vineland site shows how tightly sales and delivery are now bound together. Worth up to US$19.4 billion, it calls for slightly more than half of the capacity to be ready by the end of this year, with the remainder due in the first half of 2027. Press reports indicate Microsoft can claim compensation if delivery slips, which turns construction timelines into a line item with real financial consequences.

That matters because the company has already pushed part of its expected capacity into the first half of 2027, citing delays at third-party data center operators. The contracts themselves remain in place, Nebius said in its shareholder letter, but the revenue they carry has moved.

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The upshot is a 2026 revenue outlook at the bottom of the prior US$3.0–3.4 billion range. Investors reacted sharply, sending the shares down 17% following the guidance and the higher spending plans.

The Quarter Behind the Guidance

The numbers underneath the cautious outlook were anything but soft. Third-quarter revenue reached US$980.8 million, up 571% year over year. Adjusted EBITDA came in at US$465.8 million, reversing a US$5.2 million loss in the same period a year earlier. The net loss from continuing operations narrowed to US$37.5 million from US$119.6 million.

Strip out roughly US$325 million in one-off partnership revenue, and the top line was closer to US$656 million. That distinction carries weight: one-time partnership income flatters a single quarter, while recurring revenue from usable capacity is what has to sustain the expansion over time.

What 2027 Has to Deliver

Management has put numbers on the payoff. Nebius expects 2027 revenue of US$12–13 billion and aims to reach pre-tax break-even by the end of that year. Hitting those targets depends on a fairly narrow sequence of events — prepayments arriving, construction finishing, and contracted capacity converting into billable compute.

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The financing structure sharpens the stakes. A customer who pays upfront gives Nebius capital to build with, but the obligation to deliver hardens in step with the size of the check. The Vineland contract is the clearest example: its scale is an asset only if the handover happens, and every further delay adds potential liability toward the customer.

For investors, the question is less about demand than about execution. Nebius has the contracts and, for now, the funding structure to match. What remains unproven is whether the infrastructure can be handed over reliably enough — and quickly enough — to keep the customer-funded model from turning into a customer-funded burden.

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