Will Nebius or Coreweave Reach The Point of Return First?

CoreWeave (NASDAQ:CRWV) and Nebius Group (NASDAQ:NBIS | NBIS Price Prediction) reported Q2 2026 results in August 2026. Both companies sold every GPU they brought online. Now investors want to know which one reaches positive free cash flow first, and which one runs into serious trouble first. Last week’s selloff added urgency, as rate-hike fears hit AI debt.

Scale Lifts CoreWeave While Prepayments Fund Nebius

CoreWeave’s revenue rose to $2.58B, up 112.3% YoY, and its backlog reached about $104B. That order book gives it years of visibility. CFO Nitin Agrawal said “Q2 marked the quarter in which we saw margins inflect.” Even so, adjusted operating margin came in at just 5%, down from 16% YoY, which leaves little buffer. Managed inference gives some hope: booked ARR rose from $1 million to more than $100 million within months of launch, and that business has higher margins.

Nebius is far smaller at $582.3M in revenue, up 454%, yet its group adjusted EBITDA margin reached 41%, which shows unusual discipline for a company its size. Operating cash flow hit $2.3 billion, mostly from customer prepayments. Its first capacity auction cleared 15% above the highest price Nebius had ever charged, so customers are still paying up for capacity.

Borrowed Billions Versus Customer-Funded Builds

CoreWeave pays for its expansion mostly with borrowed money. Debt-to-equity stands at 8.94, free cash flow came in at -$5.74B, and management guided Q3 interest expense to $860 to $940 million. Agrawal argues each deployment ends up “fully repaying asset level debt used to fund the capex.” I find that plausible. It also assumes credit markets stay open, and last week’s bond plunge put that assumption to the test.

Nebius takes a different approach. Management said “Our first sources of capital remain customer prepayments and operating cash flow,” and it expects more than $9 billion in prepayments this year. Its weak spot is concentration: three customers accounted for 24%, 21%, and 14% of Q2 revenue.

Interest Bills and One Big Customer Could Decide Who Stumbles

One thing to watch is whether CoreWeave raises adjusted operating margins to the low teens in Q4 while its interest costs keep rising. With Nebius, you should keep an eye on its $12.1B in future lease obligations and on the 2027 guidance management has promised to deliver later this year.

Why I Think Nebius Reaches Payback First

The market seems to agree with me. CoreWeave shares are down 14.65% year to date, while Nebius has gained 103.38%. To me, CoreWeave is the more likely of the two to hit deep trouble first. With $72.05B in liabilities against thin equity, a credit squeeze would hit it harder.

Nebius funds more of its growth with customer money and runs wider margins. That puts it closer to self-funding, as long as its biggest customers stay put. That assessment would change if CoreWeave keeps cutting its borrowing costs or if Nebius loses a major account.

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