AI Investor Leopold Aschenbrenner hedge fund : Situational Awareness & Citadel Deal
Leopold Aschenbrenner is a former OpenAI Superalignment researcher who gained widespread attention in mid-2024 after publishing his 165-page treatise, “Situational Awareness: The Decade Ahead”. In it, he laid out a detailed thesis predicting Artificial General Intelligence (AGI) by 2027, along with massive national security implications and a multi-trillion-dollar cluster buildout for AI computing.
Following the viral reception of the paper, he launched an AI-focused macro hedge fund named Situational Awareness LP.
Key Facts About Situational Awareness | Leopold Aschenbrenner
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Founding & Backers: Launched in late 2024 with anchor investments from high-profile figures, including Patrick and John Collison (Stripe), Nat Friedman, Daniel Gross, and trading giant Jane Street.
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Core Investment Strategy: Heavily concentrated, leveraged bets on AI physical infrastructure (chipmakers, high-bandwidth memory suppliers, data centres, power producers like CoreWeave, Micron, Nebius, and SK Hynix) paired with short positions in legacy software providers.
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Rapid Rise: Driven by dramatic AI stock rallies and heavy borrowing (leverage), the fund posted massive early gains (reportedly up over 400% in the first half of 2026) and saw its assets under management peak between $20 billion and $45 billion.
The Unwind & Ken Griffin’s Citadel Buyout
In July 2026, a sharp sell-off in AI infrastructure stocks alongside a rally in shorted software equities squeezed the fund’s heavily leveraged positions from both sides. Facing severe margin calls from prime brokers (including Goldman Sachs, JPMorgan, and Bank of America):
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Forced Liquidation: The fund was forced to unwind its public equities portfolio to meet collateral demands.
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Citadel’s Block Purchase: Ken Griffin’s Citadel ($71B+ AUM) stepped in as the primary buyer, purchasing the majority of Situational Awareness’s public equities book in a massive off-market deal.
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Transition to Private Firm: While Situational Awareness unwound its public stock book, the firm retained its estimated $5 billion private stake in Anthropic and is transitioning into a private investment vehicle rather than a public equity hedge fund.
