Nvidia owns 9.3% of Nebius; stock jumps 19% on disclosure

On Tuesday, Nvidia disclosed through a Schedule 13G filing that it beneficially owns 9.3% of Nebius Group, an AI cloud infrastructure provider whose shares jumped nearly 19% to close at $217.09. The stock has risen more than 300% over the past year, reflecting investor enthusiasm for AI infrastructure plays. However, the composition of Nvidia's stake reveals a more nuanced picture than the headline suggests.

Of the approximately 22.3 million shares covered by the filing, only about 1.2 million are common stock that Nvidia holds outright. The remaining roughly 21 million shares come from a pre-funded warrant Nvidia purchased as part of its previously announced $2 billion（約3200億円） investment in Nebius, at an exercise price of just $0.0001 per share. Critically, Nvidia cannot exercise the warrant or sell those shares before September 11. Nebius already counts those warrant shares as outstanding for earnings-per-share calculations, meaning the 9.3% figure includes a large contingent position not yet in Nvidia's hands.

The Schedule 13G itself is a passive filing, signaling that Nvidia is not seeking control or pushing for operational changes at Nebius. The company is taking a financial and strategic position, not positioning for a takeover. Put plainly, Nvidia did not suddenly buy a tenth of Nebius on the open market this week; the filing largely formalizes the stake investors already knew about from the investment announcement. The market's 19% response appears driven more by sentiment toward Nvidia's backing than by new concrete information.

Nebius operates as what the industry calls a neocloud—it buys enormous quantities of graphics processing units, overwhelmingly from Nvidia, and converts them into rentable AI computing capacity for customers unable to build their own infrastructure. Nvidia's equity stake deepens an existing financial loop: Nebius gets capital, credibility, and a major supplier's implicit endorsement; Nvidia secures a fast-growing buyer of its chips while claiming a slice of future profits. The $2 billion（約3200億円） bet also signals Nvidia's conviction that demand for AI computing capacity will continue to outrun supply.

Nebius has momentum to support that conviction. Its trailing 12-month revenue totals about $878 million（約1400億円）. In March, Meta Platforms signed a long-term agreement committing to spend up to $27 billion（約4.3兆円） on Nebius's AI infrastructure, a massive validation of both the company's capacity and the market's appetite. Yet the stock's price action has been extreme. Shares traded below $50 within the past year, peaked at $299.86, and even after Tuesday's jump still sit about 28% below that high—volatility typical in this corner of the AI market.

The core challenge is valuation. After Tuesday's jump, Nebius commands a market capitalization of about $55 billion（約8.8兆円）, translating to a price-to-sales multiple of more than 60 times trailing revenue. That multiple embeds expectations of years of hypergrowth and flawless execution in an extremely capital-hungry business. Building AI infrastructure requires staggering spending on data centers, power, and semiconductors, and Nebius will almost certainly need to keep raising capital to fund expansion. Every dollar of that capital deployment must earn a competitive return in a market where the largest cloud providers—Amazon Web Services, Google Cloud, Microsoft Azure—are simultaneously building the same infrastructure.

Additionally, Nvidia's passive minority stake carries important limitations. It does not guarantee Nebius preferential access to Nvidia chips. It does not change the company's underlying economics or its substantial capital needs, and it does not make the rich valuation any cheaper. Nvidia's endorsement strengthens the bull case but cannot substitute for one. For Nebius shareholders, the knowledge that the most important company in AI wants the company to succeed and has put $2 billion（約3200億円） behind that preference is comforting. But at more than 60 times sales, the stock has already priced in an enormous amount of success, and Tuesday's pop made that math harder to defend.

Nvidia's 9.3% stake in Nebius, while disclosed this week through a Schedule 13G filing, formalizes a position investors already knew about since the company's $2 billion（約3200億円） investment announcement. The market's nearly 19% jump on Tuesday reflects investor sentiment toward anything Nvidia endorses rather than new information. What matters is the structure: only 1.2 million of the 22.3 million shares are common stock Nvidia owns outright, with the remainder coming from a pre-funded warrant exercisable at $0.0001 per share but locked until September 11.

Nvidia's stake in Nebius reveals the company's strategic interest in deepening a profitable loop. Nebius buys Nvidia's GPUs and converts them into rentable AI computing capacity, so Nvidia gains a major customer and participates in the upside of Nebius's growth. The $2 billion（約3200億円） bet also signals that Nvidia expects robust ongoing demand for AI infrastructure—a company betting $2 billion（約3200億円） doesn't do so if capacity is going unsold. Nebius's trailing 12-month revenue of about $878 million（約1400億円） and Meta's commitment to spend up to $27 billion（約4.3兆円） on its infrastructure underscore the scale of the opportunity.

Yet the valuation tells a cautionary tale. After Tuesday's jump, Nebius trades at more than 60 times trailing sales, a multiple that assumes years of flawless execution in one of technology's most capital-intensive businesses. The stock's wild swings—trading below $50 within the past year, peaking at $299.86, and now sitting about 28% below that peak—reflect the market's extreme uncertainty about growth trajectories in this segment. Nvidia's passive minority stake (indicated by the Schedule 13G filing) does not guarantee Nebius preferential chip access, cannot ease the company's substantial capital needs, and does not make the valuation cheaper. For shareholders, Nvidia's endorsement is comforting; for investors, it is not a substitute for fundamentals.