# This AI stock is surging after an ex-OpenAI employee's fund disclosed a stake. Here's why — retained record

> Retained news record from news:cnbc-tech.

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source: [news](https://highsignal.app/data/news) (news:cnbc-tech)  published 2026-05-28 09:30 ingested 2026-05-28 09:52

[Meta Platforms Inc.](https://highsignal.app/entities/META)[original source ↗](https://www.cnbc.com/2026/05/28/nebius-situational-awareness-ai-stock-ex-openai-stake.html)

## extract

Dutch cloud provider Nebius popped in premarket trading Thursday after an ex-OpenAI employee's fund disclosed a sizeable stake in the firm.
Situational Awareness, a hedge fund founded by former OpenAI researcher Leopold Aschenbrenner, now owns 12.4 million Class A shares of the AI firm, according to a filing published on Wednesday. That represents a 5.6% stake.
Situational Awareness manages billions in funds and invests in the physical infrastructure necessary for the future of AI.
Nebius, which is listed in the U.S., was last seen up 11% in premarket trading. The stock is up 149% year-to-date.
Nebius has emerged as a key AI compute provider in Europe and has secured several partnerships in recent months, including a $27 billion deal with Meta in March. Nebius will provide $12 billion of dedicated capacity and up to $15 billion of additional compute capacity over five years as part of the deal.
It also secured a $2 billion investment from Nvidia in the same month. The deal will see the two firms collaborate on AI infrastructure deployment, fleet management, inference and AI factory design and support.

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