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Situational Awareness LP Bets Big on AI Cloud Infrastructure
Nebius Group N.V. (Nasdaq: NBIS) shares jumped sharply in premarket trading on May 28, 2026, after Situational Awareness LP — the AI-focused hedge fund led by former OpenAI researcher Leopold Aschenbrenner — disclosed a significant passive ownership position in the Amsterdam-headquartered AI cloud company. The fund, alongside affiliated entities including SAF AI GP LP, Situational Awareness LLC, Situational Awareness Partners LP, and co-portfolio manager Carl Shulman, jointly filed a Schedule 13G with the SEC on May 27, 2026, reporting beneficial ownership of 12,410,060 Class A Ordinary Shares, representing 5.6% of the 220,406,311 shares outstanding as of March 31, 2026. At NBIS's prior closing price of $208.37, the position carries a market value of approximately $2.58 billion.
- Situational Awareness LP filed a Schedule 13G on May 27, 2026, disclosing 12,410,060 Class A shares of Nebius Group — a 5.6% passive stake.
- NBIS shares surged to $227.10 in premarket trading on May 28, up ~9% from the prior close of $208.37, on 573,000+ premarket shares.
- The disclosure comes weeks after Nebius reported Q1 2026 revenue of $399 million, a 684% year-over-year increase, cementing its position as a leading AI infrastructure provider.
NBIS shares climbed to $227.10 in premarket trading, a gain of $18.73 or roughly 9%, on pre-market volume exceeding 573,000 shares — well above typical pre-bell activity for the stock.
Who Is Situational Awareness LP?
Situational Awareness LP is a San Francisco-based hedge fund headquartered at 77 Federal Street, founded and managed as Chief Investment Officer by Leopold Aschenbrenner, a former researcher at OpenAI. Aschenbrenner gained widespread recognition across the AI and financial community after departing OpenAI in 2024 and publishing a landmark research essay titled Situational Awareness: The Decade Ahead, which outlined an aggressive timeline toward artificial general intelligence and its macroeconomic consequences. The fund was seeded with Silicon Valley capital and operates with a concentrated, conviction-driven mandate centered on companies positioned at the critical infrastructure layer of the AI boom.
Co-portfolio manager Carl Shulman, a prominent AI safety researcher and advisor, is also listed as a reporting person in the 13G filing. The Schedule 13G designation — as opposed to a 13D — confirms that the position is passive in nature and was not accumulated for the purpose of influencing or controlling Nebius Group's management or strategic direction. The triggering event for the filing was recorded as May 19, 2026.
Nebius: From Yandex Spinoff to AI Infrastructure Powerhouse
Nebius's most recent quarterly results dramatically underscored the scale of its revenue acceleration. In Q1 2026, the company reported revenue of $399 million, a 684% year-over-year surge, significantly exceeding analyst expectations. The result followed a 355% year-over-year revenue increase in Q3 2025 and a 437% rise in the fourth quarter, reflecting near-exponential capacity deployment and robust enterprise GPU demand. The company has committed to a $2 billion capital expenditure plan for 2025 alone, investing aggressively in Nvidia GPU infrastructure and data center expansion across Europe and the United States.
Institutional Endorsement Amplifies Market Momentum
The Situational Awareness filing adds to an already compelling institutional ownership narrative around Nebius. BlackRock previously disclosed a significant stake in the company, underscoring its expansion into the AI infrastructure investment theme. With 751 institutional owners on record through 13D/G and 13F filings, NBIS has become one of the most actively followed AI infrastructure equities among professional investors.
The entry of Aschenbrenner's fund carries particular symbolic weight given the founder's intellectual profile and deep technical expertise in AI scaling trajectories. For market participants, a concentrated passive bet of this magnitude from a fund explicitly structured around the AI transformation thesis functions as a high-conviction signal on long-cycle infrastructure demand. The stock's 52-week range spans $34.72 to $233.73, with NBIS having delivered a 447% gain over the trailing twelve months heading into the May 28 session.
Market Context and Forward Outlook
Nebius enters the second half of 2026 with a market capitalization north of $52 billion, a next earnings report scheduled for August 6, 2026, and a forward price-to-earnings multiple that reflects investor expectations for continued hypergrowth in the neocloud segment. Analysts at Goldman Sachs have recently revised their price target upward, while the consensus analyst target of approximately $210.83 had already been eclipsed by Wednesday's premarket prints. The broader neocloud market — purpose-built AI cloud infrastructure separate from legacy hyperscalers — generated roughly $25 billion in revenue in 2025 and is projected to scale dramatically through the decade.
With Situational Awareness LP now the third-largest disclosed shareholder in Nebius behind legacy institutional holders, the 13G filing adds a fresh layer of conviction from one of Silicon Valley's most closely watched AI-native investment vehicles. The positioning reinforces the thesis that Nebius, with its full-stack approach and GPU-dense infrastructure buildout, occupies a structurally advantaged position in the global AI compute race.
Mentioned tickers: NBIS
