Nebius Breaks Below Key Support as Meta Cloud Play and Insider Sales Stoke Fear

Nebius shares tumble after Meta announces cloud unit, risking its largest customer relationship. Insider selling and high short interest add to bearish sentiment despite strong revenue growth.

Nebius shares slumped 9% to €182.88 on fresh fears that its largest customer is turning into a direct rival. The week’s losses now top 19%, wiping out a chunk of the gains that had propelled the stock to a record €261 just weeks ago. The trigger: Meta Platforms’ plan to launch a cloud unit called Meta Compute that would sell excess GPU capacity to third-party developers.

Meta represents more than half of Nebius’s current order backlog. The two companies signed a multi-billion-dollar infrastructure partnership in the spring, with a total potential value of up to $27 billion. If Meta starts marketing its own compute capacity, the tight relationship could sour quickly. Market participants worry that a flood of cheap GPU supply from the tech giant would crush the margins that specialists like Nebius have been enjoying.

The anxiety goes beyond the headline threat. Short interest stands at a hefty 24%, reflecting deep skepticism. More troubling, Nebius’s own leadership has been voting with their feet. Over the past twelve months, insiders executed 17 sales of company shares and not a single purchase. In the last three months alone, executives Elena Bunina and Andrey Korolenko unloaded more than 626,000 shares. That exodus sends an unmistakable signal about the conviction of those closest to the business.

Optimists argue the market is overreacting. Nebius’s first-quarter revenue surged 684% year-on-year to $399 million, underscoring the relentless demand for AI compute capacity. Analysts at Roth Capital point out that the Meta contract includes fixed commitments that are not easily unwound. The company has also started to diversify, recently launching a specialized AI platform for the healthcare sector and offering $1.4 million in compute credits to start-ups in an effort to build a loyal customer base that values more than raw GPU power.

Still, the bear case is formidable. If Meta begins selling capacity to outsiders, the “neocloud” market could become commoditized, squeezing Nebius’s margins just as it embarks on a $25-billion capital spending plan for 2026. The company’s annualized volatility, already above 100%, shows how quickly sentiment can shift around a stock priced for perfection.

Technically, the picture is deteriorating. The slide has pushed the stock below its 50-day moving average. The next support sits at the 100-day average near €144; a break below that would open the door to the 200-day line around €115. A recovery depends on Nebius providing clarity that its relationship with Meta remains solid. Any concrete timeline for the Meta Compute rollout – or a weak report on new customer wins – could extend the damage.

Investors now have two things firmly in their crosshairs: official communications from Nebius regarding the status of the Meta partnership, and any updates on the company’s capital expenditure plans. Until those signals arrive, the stock is likely to remain under the shadow of its own biggest client.