The Genius of Leopold Aschenbrenner
Fame, fortune, prophecy, leverage and controversy. A real 'Nostradamus of AI' if you will.
👋 Hey there, I’m Mike. Each week I share AI articles at the intersection of tech, business, society and the future. If you want to support the channel or gain full-access to my work, go here. Read Archives | See Substack Notes | Visit our community Chat | Visit Homepage. A 24 year old Hedge Fund star has emerged and become more famous by the boldness of his mistakes. The AI theme may feature briefly in this story.
Good Morning,
I just wanted to share a little note. Or if you prefer to listen. (20 minutes, 19 seconds).
How should we understand the cautionary tale of AI investor and Hedge fund manager Leopold Aschenbrenner in his rapid rise to fame and fortune? For context AI investor Leopold Aschenbrenner worked at the FTX Future Fund (the philanthropic arm of Sam Bankman-Fried's cryptocurrency exchange FTX) before it collapsed. He later joined OpenAI's Superalignment team, and after leaving, founded the AI hedge fund Situational Awareness LP. He had a knack for spotting “bottlenecks” in the Semiconductor industry and predicting them well before stocks surged.
Who intersected Sam Bankman-Fried and Sam Altman in quite the same way while heralding the advent of AGI? I remember reading his Situational Awareness manifesto and wondering who was funding him? Remember Sam Bankman-Fried and Alameda Research led a Series B/early-stage investment into Anthropic in 2021 when the AI startup was valued at roughly $2.5 billion. There are a lot of Anthropic connections in this story. That eight percent Alameda stake would be worth $77.2 billion today.
As you’ve likely already heard, Leopold Aschenbrenner’s hedge fund was forced to sell all of its public stock holdings where Ken Griffin’s Citadel hedge fund swooped in and reached a deal to buy the stocks. Of course now he wants to raise even more capital. Situational Awareness, which grew to as big as $45 billion at one point, posted large losses in recent weeks from declines in AI infrastructure investments like SK Hynix but he still has a huge amount of Anthropic shares and made some decent bets, if a bit concentrated.
He was born in Germany to parents who were both doctors. At age 15 he convinced his parents to let him move alone to the United States and enroll at Columbia University. At Columbia he double-majored in economics and mathematics-statistics. He co-founded the university’s effective altruism (EA) chapter, conducted research connected to the Global Priorities Institute at Oxford, and co-authored work with economist Philip Trammell. At 17 he received a grant from Tyler Cowen’s Emergent Ventures; Cowen later described him as an “economics prodigy” after reading one of his papers. He graduated as valedictorian in 2021 at age 19.
In 2023 he joined OpenAI’s Superalignment team (led by Jan Leike and Ilya Sutskever), which focused on technical approaches to controlling AI systems more capable than humans. He co-authored the paper “Weak to Strong Generalization.” In April 2024 OpenAI fired him; the company cited an alleged information leak, while Aschenbrenner has disputed the characterization and pointed to internal security concerns he raised (including about potential foreign espionage risks). The Superalignment team was dissolved shortly afterward.
In a very short time, now 24, he’s become one of the most tracked Financial Creators on X. Aschenbrenner launched the fund after leaving OpenAI in 2024 and quickly became one of the most watched figures in AI investing because of eye-popping returns, according to CNBC.
In June 2024, roughly two months after leaving OpenAI, he self-published the ~165-page essay Situational Awareness: The Decade Ahead. It argued that AGI could arrive as early as around 2027, sketched a path toward superintelligence, highlighted compute/energy constraints, geopolitical risks (especially involving China), and national-security implications. The piece circulated widely in AI, tech, policy, and investor circles and various AI boosters.
His Fund has done fantastically well, where returns since inception had exceeded 1000% and the fund had expanded to around $20 billion, according to the FT. Rumor has it he has to sell about half of his Anthropic shares in the recent Bear market correction on Semis of late July, 2026.
The hedge fund Situational Awareness LP (named after the essay), initially with seed capital of roughly $225 million from backers including Nat Friedman, Daniel Gross, and Stripe co-founders Patrick and John Collison. These are very powerful and influential Angel investors in the AI space. Notably Jane Street, the Quantitative trading firm appears to be a major backer. Jane Street has also been incredibly successful in this AI bubble/boom. It’s a very mysterious connection for me.
Leo became a bit of a cult figure around investors cashing in on the Semiconductor boom. But his success is also going to lead to more success, even though his calls have been incredibly high-risk:
The fund hit $45 billion at the start of July. His biggest bets were SK Hynix, Nebius, SanDisk, Micron, and CoreWeave, all down more than 35% this month (at the time of writing). His shorts on software names like Adobe went against him too. Citadel bought the bulk of what was left. He's 24 or maybe just 25 years old.
