Leopold Aschenbrenner, a 25-year-old AI hedge fund prodigy, lost $35 billion in 72 hours due to extreme 400% leverage and a market selloff triggered by doubts about AI timelines, leading to forced liquidation of his portfolio at a steep discount. Despite this collapse, his remaining private holdings and continued investments reflect his resilience and belief in AI’s long-term potential, highlighting the risks and rewards of aggressive investing in emerging technologies.
Leopold Aschenbrenner, a 25-year-old AI prodigy, saw his hedge fund lose $35 billion in just 72 hours due to a perfect storm of margin calls and market dynamics. Running one of the most celebrated hedge funds focused on AI infrastructure investments, Leopold had leveraged his fund up to 400%, borrowing $4 for every $1 he owned. His fund, Situational Awareness LP, had grown from $225 million to $45 billion in under two years by betting heavily on AI hardware and shorting software companies, based on his conviction that Artificial General Intelligence (AGI) would arrive by 2027. However, this highly leveraged, all-in bet left him vulnerable when the market started doubting the AI timeline.
The collapse began in July 2026 when Meta announced a new cloud infrastructure initiative that triggered concerns about AI spending, causing a selloff in key stocks within Leopold’s portfolio. The fund’s positions dropped sharply, and with such high leverage, a 35% decline wiped out all equity, prompting margin calls from major banks like Goldman Sachs, JPMorgan Chase, and Bank of America. Leopold scrambled to raise liquidity by trying to sell part of his $5 billion Anthropic stake but failed to close a deal in time. As a result, his public equity portfolio was forcibly liquidated in a pre-market block trade to Citadel Securities at a 10% discount.
Citadel, led by Ken Griffin, capitalized on the fire sale, acquiring Leopold’s portfolio at a steep discount and quickly profiting as the stocks rebounded the next day. This event highlighted the ruthless nature of Wall Street, where buyers like Citadel exploit distressed sellers without regard for their struggles. Despite the fund’s public portfolio collapse, Leopold’s private stake in Anthropic, valued at around $5 billion, remained intact and is expected to increase significantly with Anthropic’s upcoming IPO. The fund still manages about $10 billion, and early investors have retained substantial gains, though recent investors suffered heavy losses.
Leopold’s rise and fall underscore the risks of extreme leverage and concentrated bets in volatile markets, especially in emerging sectors like AI. His academic brilliance and early career at prestigious institutions like Columbia, Oxford, FTX, and OpenAI fueled his confidence, but his lack of traditional risk management and compliance infrastructure contributed to the fund’s downfall. The episode also raised questions about whether rival funds deliberately accelerated his collapse by shorting the same stocks, a legal but ethically debatable tactic in financial markets.
Despite the catastrophic loss, Leopold remains undeterred, embodying Silicon Valley’s resilience and appetite for risk. Shortly after the collapse, he invested hundreds of millions into a private startup, signaling his belief in the long-term potential of AI. While Wall Street views such a loss as career-ending, Silicon Valley sees it as a stepping stone to future success. Leopold’s story is a cautionary tale about the high stakes of the AI revolution and the fine line between visionary investing and reckless speculation.