Key Takeaways
- • Leopold Aschenbrenner's Situational Awareness LP has deployed approximately $5.5 billion in U.S. equity exposure by Q1 2025, growing from $225 million in seed capital since its late 2024 launch, making it one of the fastest-scaling hedge funds in recent memory.
- • The fund established massive bearish put option positions totaling over $8 billion across major AI chip manufacturers in Q1 2025: $1.56 billion on Nvidia, $2 billion on the VanEck Semiconductor ETF, $1.07 billion on Oracle, $1 billion on Broadcom, and nearly $1 billion on AMD, signaling conviction that the AI hardware sector is overvalued.
- • Situational Awareness simultaneously increased bullish long positions and call options in alternative AI infrastructure plays including CleanSpark, Riot Platforms, Applied Digital, and IREN, indicating a selective rather than blanket bearish stance on AI infrastructure broadly.
- • The fund's positioning reflects Aschenbrenner's published thesis from his viral 2024 paper "Situational Awareness: The Decade Ahead," which highlighted concerns about AI progress diverging from market pricing and fundamental value creation in the chip sector.
- • Prominent Silicon Valley investors including Graham Duncan (veteran hedge fund manager), Nat Friedman (Meta AI product lead), and other technology industry figures are backing the fund, providing both capital and industry expertise for Aschenbrenner's contrarian AI thesis.
Summary
Leopold Aschenbrenner, a 24-year-old former OpenAI researcher dismissed in 2024, has rapidly scaled Situational Awareness LP into a $5.5 billion hedge fund positioned as a contrarian bet against consensus AI chip enthusiasm. The fund, which began with approximately $225 million in seed capital in late 2024, has grown to manage roughly $9.3 billion in discretionary assets under management as of April 2026, according to SEC filings.
The fund's investment thesis centers on a fundamental disconnect between valuation levels in AI semiconductor stocks and underlying fundamentals. According to the firm's May 18, 2026 13F filing covering Q1 2025 activity, Situational Awareness deployed substantial bearish put option positions across the semiconductor and software sectors. The largest position is a $1.56 billion put option bet against Nvidia, followed by $2 billion in puts on the VanEck Semiconductor ETF. Additional significant bearish bets include $1.07 billion against Oracle, $1 billion against Broadcom, and $969.2 million against AMD. The fund also established put positions of $535.1 million on Taiwan Semiconductor Manufacturing Co., $494.1 million on ASML Holding, and $159.1 million on Intel.
Critically, Aschenbrenner's fund is not uniformly bearish on AI infrastructure. Simultaneously, the fund increased long equity positions in companies positioned at different points in the AI value chain, including CleanSpark, Riot Platforms, Applied Digital, and IREN. This selective positioning suggests the fund is betting on a sector rotation where certain AI infrastructure players are rewarded while traditional semiconductor manufacturers face pressure—a nuanced contrarian view rather than a broad market rejection of AI infrastructure themes.
Aschenbrenner's credibility stems from his August 2024 viral paper, "Situational Awareness: The Decade Ahead," which articulated concerns about AI progress and development trajectories diverging from market pricing. The fund has attracted backing from established Silicon Valley figures including Graham Duncan, a veteran hedge fund investor who serves as an advisor, and Nat Friedman, Meta's AI product lead, among other technology entrepreneurs and investors. This institutional support has enabled rapid capital formation despite the fund's unconventional thesis and the youth of its founder.
The positioning raises substantive questions about semiconductor valuation in the current market cycle, with Aschenbrenner betting that the market has overpriced chip manufacturers while undervaluing alternative infrastructure approaches to AI development and deployment. The scale of the bearish positions—totaling over $8 billion in put option notional exposure—represents one of the largest thematic bets against a single sector by a newly established hedge fund.
The fund's investment thesis centers on a fundamental disconnect between valuation levels in AI semiconductor stocks and underlying fundamentals. According to the firm's May 18, 2026 13F filing covering Q1 2025 activity, Situational Awareness deployed substantial bearish put option positions across the semiconductor and software sectors. The largest position is a $1.56 billion put option bet against Nvidia, followed by $2 billion in puts on the VanEck Semiconductor ETF. Additional significant bearish bets include $1.07 billion against Oracle, $1 billion against Broadcom, and $969.2 million against AMD. The fund also established put positions of $535.1 million on Taiwan Semiconductor Manufacturing Co., $494.1 million on ASML Holding, and $159.1 million on Intel.
Critically, Aschenbrenner's fund is not uniformly bearish on AI infrastructure. Simultaneously, the fund increased long equity positions in companies positioned at different points in the AI value chain, including CleanSpark, Riot Platforms, Applied Digital, and IREN. This selective positioning suggests the fund is betting on a sector rotation where certain AI infrastructure players are rewarded while traditional semiconductor manufacturers face pressure—a nuanced contrarian view rather than a broad market rejection of AI infrastructure themes.
Aschenbrenner's credibility stems from his August 2024 viral paper, "Situational Awareness: The Decade Ahead," which articulated concerns about AI progress and development trajectories diverging from market pricing. The fund has attracted backing from established Silicon Valley figures including Graham Duncan, a veteran hedge fund investor who serves as an advisor, and Nat Friedman, Meta's AI product lead, among other technology entrepreneurs and investors. This institutional support has enabled rapid capital formation despite the fund's unconventional thesis and the youth of its founder.
The positioning raises substantive questions about semiconductor valuation in the current market cycle, with Aschenbrenner betting that the market has overpriced chip manufacturers while undervaluing alternative infrastructure approaches to AI development and deployment. The scale of the bearish positions—totaling over $8 billion in put option notional exposure—represents one of the largest thematic bets against a single sector by a newly established hedge fund.
Go deeper than the headline
Research every firm in this story, track the ones that matter and get the daily briefing — free for 7 days.