Nebius shares soared: its shareholder turned out to be an important AI investor who worked at OpenAI
Papers have risen 448% in the last 12 months

Nebius shares jump after disclosure of Aschenbrenner's fund stake / Photo: Nebius Group
Shares of billionaire Arkady Volozh's Nebius Group neo-cloud provider soared more than 11% on the premarket on May 28. Famous artificial intelligence investor Leopold Aschenbrenner turned out to be a shareholder in the company, Barron's writes. If that momentum continues into mainstream trading, Nebius stock will accelerate its gains this year, which have already reached nearly 150%.
What is known about the investor?
On Ma 27, Aschenbrenner's Situational Awareness fund disclosed ownership of 12.41 million Nebius Class A shares (as of March 31, 2026). This corresponds to a 5.6% stake in the IT company, according to the disclosure. Based on Nebius' share price at the close of trading on Wednesday, Ma. 27, Situational Awareness' stake was worth $2.59 billion.
Aschenbrenner previously worked briefly as a researcher at OpenAI (developer of ChatGPT) before leaving the startup to invest in the stock market, focusing on players that could benefit from advances in artificial intelligence technology, Barron's writes.
Aschenbrenner named his firm Situational Awareness after an essay of the same name he published in June 2024. In that work, the investor argued that artificial intelligence, actually superior to human intelligence, could emerge as early as 2027.
The Situational Awareness fund also holds significant stakes in neoblack companies CoreWeave and IREN, Barron's notes.
What are the analysts saying?
Nebius shares are recommended to buy by 11 of 16 analysts covering the company's stock, MarketWatch data shows. Four more advise to keep them in the portfolio, one - to sell.
Analysts' average target price implies a 16% increase in the company's stock relative to the last closing price.
This article was AI-translated and verified by a human editor



