Leopold Aschenbrenner, once hailed as an investing wunderkind, is now facing a harsh reality check after his artificial intelligence focused hedge fund suffered a staggering sixty seven percent loss in July. In a candid letter to investors, the former OpenAI researcher admitted that he let his backers down, acknowledging that the fund came dangerously close to permanent capital impairment. The meltdown followed a meteoric rise for Situational Awareness, which grew from under one billion dollars at its launch in early 2025 to forty five billion dollars by the start of July.
The crisis was triggered by Aschenbrenner’s aggressive use of leverage to amplify bets on AI hardware and infrastructure players like SanDisk and SK Hynix. When those positions plummeted, the fund faced crushing margin calls, forcing it to sell the bulk of its public equities portfolio in a block transaction to Ken Griffin’s Citadel. Aschenbrenner described the experience as being similar to a bank run, where perceived vulnerability created a cycle of instability that eventually drained market liquidity and jeopardized the entire operation.
Despite the monthly collapse, Aschenbrenner insists that it is not over. He noted that the fund remains up roughly eighty percent for the year and has successfully preserved its valuable stake in Anthropic. By removing all leverage and shifting to a fully paid for public book, he claims to have restored stability to the firm and eliminated further liquidation risks. He characterized the recent losses as expensive scars that will serve as invaluable lessons for both himself and his risk management team moving forward.
Taking full responsibility for the turmoil, Aschenbrenner told his partners that while volatility is expected in the fast moving world of AI, it should never threaten the existence of the fund. He expressed continued optimism about the sector’s underlying fundamentals and pledged to work relentlessly to regain trust. To signal his commitment, he reminded investors that virtually all of his own personal capital remains invested in the fund alongside them.
