Leopold Aschenbrenner's AI hedge fund has vaulted past $20B, with Jane Street a backer
What's the deal? Leopold AschenbrennerDealroom has a profile for this one. Try Dealroom →, a 24-year-old former OpenAI researcher, had no professional investing experience when he launched his AI-focused firm, Situational Awareness, with a few hundred million dollars. Prescient stock picks and waves of inflows have since vaulted its assets under management to more than $20 billion — approaching the size of Bill AckmanDealroom has a profile for this one. Try Dealroom →'s Pershing SquareDealroom has a profile for this one. Try Dealroom → and Dan LoebDealroom has a profile for this one. Try Dealroom →'s Third PointDealroom has a profile for this one. Try Dealroom →. Among its backers is trading powerhouse Jane Street CapitalDealroom has a profile for this one. Try Dealroom →.
The backstory: Aschenbrenner's path to Wall Street was unconventional and fast. He worked at the FTX Future Fund from February to November 2022, then joined OpenAI's Superalignment team, before being fired in April 2024. Two months later he published his 165-page essay "Situational Awareness: The Decade Ahead", raised roughly $225 million from Stripe founders Patrick and John Collison, Nat Friedman and Daniel Gross, and launched the hedge fund that shares the essay's name — having never managed money before.
Aschenbrenner named the fund after his widely read June 2024 essay series, which argued that artificial general intelligence (AGI) by 2027 is "strikingly plausible" and that the race to superintelligence would reshape financial markets and national security. The essays earned him a cult following online, where his fund's routine regulatory filings are now studied like scripture.
Why it matters Aschenbrenner's thesis is playing out in real time. AI stocks have surged, massive infrastructure buildouts are underway, and the geopolitical stakes around AI development keep rising — and his fund's parabolic performance has translated internet fame into a Wall Street fan club, with a portfolio now rivalling those of established activist giants.
What could go wrong? The fund's concentrated AI bet cuts both ways. If AGI timelines slip or the AI trade reverses, a portfolio of this size built on one macro thesis could face sharp drawdowns. Aschenbrenner's celebrity status also raises the question of whether hype is outpacing fundamentals.
The signal: A 24-year-old with no prior investing experience running more than $20 billion on the strength of an essay and a bold AI forecast tells you something about where capital is flowing right now. Jane Street's involvement — a firm known for quantitative rigour — lends credibility, but also underscores how deeply institutional money is betting on an AI supercycle.
Read more: The Wall Street Journal
