Leopold Aschenbrenner's Situational Awareness fund is up 47% in H1, managing $1.5B — with Stripe founders, Daniel Gross, and Nat Friedman as LPs
Aug 11, 2025
Key Points
- Leopold Aschenbrenner's Situational Awareness fund returns 47% after fees in H1 2025, far outpacing the S&P 500 and hedge fund indices, managing $1.5 billion from prominent AI insiders including Stripe founders and Meta executives.
- Aschenbrenner built conviction on a viral 165-page PDF outlining AI infrastructure needs, betting long on semiconductor and power companies supplying data centers while shorting disruption-vulnerable industries.
- The fund's explosive growth at the hands of a 23-year-old with no prior investing experience triggers skepticism about market peaks, though backers argue AI infrastructure demand is technologically inevitable rather than speculative momentum.
Summary
Leopold Aschenbrenner's Situational Awareness fund returned 47% after fees in the first half of 2025, outpacing the S&P 500's 6% gain and the broader hedge fund index's 7%. The fund now manages $1.5 billion for a 23-year-old with no prior professional investing experience who was pushed out of OpenAI after flagging security concerns and sharing internal documents with external researchers.
Aschenbrenner built credibility on a viral essay. His 165-page "Situational Awareness" PDF outlined a thesis on AI superintelligence and the infrastructure required to build it. The fund's limited partners include Patrick and John Collison from Stripe, Daniel Gross and Nat Friedman from Meta's AI efforts, Graham Duncan from the SoSo conference, and Carl Schulman, whom Aschenbrenner recruited as director of research from Peter Thiel's macro hedge fund.
The strategy bets long on public equities positioned to benefit from AI infrastructure buildout, including semiconductor companies and power producers supplying data centers, alongside selective private stakes in Anthropic. Smaller short positions offset these bets in industries likely to face disruption. Vistra, a power company supplying AI data centers, ranks in the top three holdings of both Situational Awareness and Value Aligned Research, a competing AI-focused hedge fund managing over $3 billion across strategies.
Aschenbrenner told investors: "We are going to have way more situational awareness than any of the people who manage money in New York." The fund locked up capital for years, a rare commitment from limited partners in hedge fund fundraising.
Situational Awareness is part of a broader wave. Steve Cohen's 72 Asset Management launched Turion, an AI-focused fund up 11% year-to-date. Gavin Baker's Atheneum Management and Valor Equity Partners created an AI venture capital fund. Shawn Ma, after closing Snow Lake Capital following an SEC settlement, is fundraising for an AI-focused hedge fund through M37 Management.
Comparisons to ESG hedge funds are unavoidable. Many prominent ESG funds have shrunk or closed not because underlying technology shifted but because demand rested on institutional momentum—a game of musical chairs where Harvard adopted an ESG strategy because Calpers did. AI funds argue their thesis rests on actual infrastructure necessity and technological inevitability, though valuations remain fragile. The DeepSeek market swoon in January demonstrated how quickly sentiment can shift, though markets recovered.
Handing $1.5 billion to a 23-year-old triggers skepticism. One WSJ commenter notes it looks like proof of a market top. The counterargument points to Ken Griffin, who started Citadel as a Harvard undergrad and survived a 70% drawdown in 2008. Great hedge fund managers have all suffered massive losses. Aschenbrenner's H1 performance, while striking, does not exempt him from eventual drawdowns. The real test is whether his conviction, network depth, and AI infrastructure analysis survive volatility.