Nebius Group stock surges as Leopold Aschenbrenner's fund takes $2.6 billion stake

Nebius shares jump as former OpenAI employee's fund buys stake

Situational Awareness managed $13.67 billion as ⁠of March 31, representing 148% growth from the end of 2025. It is run by Aschenbrenner, who was previously part of the "Superalignment" team at OpenAI. AI infrastructure firm Nebius Group's shares climbed over 10% in premarket trading on Thursday, after Situational Awareness, a fund run by a former OpenAI employee ⁠named Leopold ⁠Aschenbrenner, became its biggest shareholder. The gains put the stock on track to open at its highest in over two weeks. The fund reported a 5.6% stake in ⁠Nebius, worth nearly $2.6 billion as of Wednesday. US MarketsPowered By As on 28 May 2026, 08:44 PM IST S&P 500 Top Gainers Dollar Tree112.73(17.59%) Agilent Technologies135.04(16.57%) Best Buy Co74.83(15.94%) Axon Enterprise433.94(10.89%) Gainers" S&P 500 Top Losers Coterra Energy32.56(-8.62%) Synopsys483.61(-8.05%) Tyson Foods62.61(-5.17%) Norfolk Southern310.46(-4.67%) Losers" Situational Awareness managed $13.67 billion as ⁠of March 31, representing 148% growth from the end of 2025. It is run by Aschenbrenner, who was previously part of the "Superalignment" team at OpenAI. The team, which worked to ensure AI stays aligned with human values, has been disbanded since. The Nebius bet marks ⁠a vote of confidence in the company as a key player in the AI infrastructure race. Earlier this month, Nebius reported a nearly eightfold rise in quarterly revenue.

Why is Nebius stock surging today? By Investing.com

Investing.com -- Nebius stock surged 8.7% in morning trading on the continued momentum from a high-profile hedge fund ownership disclosure, with shares hitting a new all-time high of $259.23 during today's session. Situational Awareness LP recently purchased 12.4 million shares of Nebius, representing a 5.6% ownership stake in the neocloud company, according to a 13G filing with the SEC. The fund is led by Leopold Aschenbrenner, a former OpenAI Superalignment researcher who launched Situational Awareness LP in 2024 on the thesis that rapid advances in AI will drive explosive demand for chips, data centers, and compute infrastructure. Nebius enters this period with one of the most ambitious capital spending plans in the sector, having lifted its 2026 capex target to a range of $20 billion to $25 billion, backed by a $27 billion contract with Meta Platforms and a $19.4 billion deal with Microsoft. Citigroup carries a $287 price target on the stock, while Citizens JMP sees it at $270 -- both well above where shares were trading heading into today. An upcoming investor event is also adding anticipatory interest, with co-founder and Chief Business Officer Roman Chernin set to host a fireside chat at the BofA Securities tech conference on June 3. In the first quarter of 2026, Nebius reported consolidated revenue of $399 million, a year-over-year surge of 684%, with the core AI Cloud business generating $389.7 million -- an 841% jump. Annualized run-rate revenue hit $1.92 billion by end of March, while adjusted EBITDA swung sharply into positive territory at $129.5 million. The broader market provided no tailwind: the S&P 500 is down 0.1%, the Dow Jones is down 0.2%, and the NASDAQ is down 0.2%, meaning NBIS is outperforming the index by roughly 8.8 percentage points on purely company-specific momentum. The macro calendar this week includes the ISM manufacturing index today, JOLTS job openings Tuesday, and ADP employment figures alongside the Fed's Beige Book on Wednesday. Nebius is seen as one of the clearer plays on AI compute capacity in the public market, where demand for GPUs used in AI training and inference keeps outpacing chip supply. The combination of a high-conviction institutional stake from a prominent AI-focused fund, record-breaking quarterly financials, a raised capex outlook anchored by landmark customer contracts, and an imminent investor conference appearance has converged to push NBIS to a new all-time high, decisively breaking above prior resistance and leaving the broader market well behind. This article was generated with the support of AI and reviewed by an editor. For more information see our T&C.

Nebius Group stock jumps after Aschenbrenner stake disclosed By Investing.com

Investing.com -- Nebius Group NV (NASDAQ:NBIS) shares rose 11% Thursday after Situational Awareness, an investment firm founded by former OpenAI researcher Leopold Aschenbrenner, disclosed a 5.6% stake in the Dutch neocloud company. The stake was revealed in a regulatory filing late Wednesday, marking another AI-focused investment for Aschenbrenner's firm. Amsterdam-based Nebius builds data centers designed to train AI models and run services like ChatGPT. This article was generated with the support of AI and reviewed by an editor. For more information see our T&C.