Nebius Faces $9.25B Debt Wall as Microsoft Pulls Back

Nebius Group N.V. has loaded itself with $3.5 billion in bridge financing and $5.75 billion in convertible notes — and the conversion prices on those notes sit far above where NBIS shares trade today. That financing math, laid bare in a new bearish analysis, frames the Netherlands-based AI infrastructure provider as what the analyst calls "the first domino in the AI collapse."

At roughly $130 per share, the market is effectively pricing Nebius for 285% growth in 2027. The analyst argues recent developments point the other way: slower growth, execution stumbles, and a refinancing burden that gets more expensive the longer the gap between promise and delivery widens.

Why does Microsoft's retreat matter?

The core commercial threat is Microsoft. The software giant has been reducing its neocloud partnerships and may not renew existing deals, according to the analysis. For Nebius, whose growth outlook leans heavily on hyperscaler demand for rented GPU capacity, a non-renewal wouldn't just trim revenue — it would undercut the utilization assumptions that justify the company's aggressive data center buildout.

Microsoft hasn't announced a formal termination. But the direction matters. When your largest potential counterparty quietly walks back a purchasing channel, every capacity target built on that channel becomes a guess rather than a plan.

Where is execution slipping?

Two pressures compound the Microsoft problem.

• Site delays. Nebius's Vineland, New Jersey, facility has slipped its timeline, and each month of delay pushes back the revenue that the site's power and capacity targets were supposed to unlock.
• Political friction. A stricter political environment for large power draws and data center permitting threatens Nebius's ability to hit its power and capacity targets at all, raising what the analysis calls execution risk.

Power is the binding constraint in AI infrastructure right now. If Vineland can't secure and energize its allocated megawatts on schedule, the GPUs destined for the site generate nothing but depreciation.

How expensive is the money?

The capital structure tells its own story.

• A $3.5 billion bridge loan carries high costs and must be refinanced.
• $5.75 billion in convertible notes come with conversion prices far above the current share price — meaning bondholders don't expect to convert, and Nebius may face cash repayment instead.

That's $9.25 billion in obligations layered onto a company whose equity valuation already assumes near-tripling growth by 2027. If shares stay depressed, the converts behave like debt with a bullet payment. If growth disappoints simultaneously, refinancing gets pricier exactly when cash flow is weakest. The analysis flags this refinancing risk as a central bear case pillar.

Is the 285% growth priced in realistic?

The analyst doesn't think so. Every leg of the bull case — Microsoft renewals, Vineland power delivery, cheap follow-on capital — has shown signs of weakening rather than strengthening in recent months. The piece concludes that slower growth is now the more probable path, and it reinforces a bearish stance on the stock.

The author discloses no position in any company mentioned and no plans to initiate one within 72 hours, and the piece is published as independent analysis rather than a recommendation.

What happens next?

Watch three things: whether Microsoft renews or lets lapse its neocloud arrangements, whether Vineland hits its next power and construction milestones, and how Nebius handles the bridge loan's maturity. If any one of those dominoes falls, the analyst suggests the rest — the growth assumptions, the conversion economics, the $130 share price — follow in short order.