Leopold Aschenbrenner's AI Hedge Fund Flamed Out Just as He Walked Down the Aisle

Leopold Aschenbrenner, a 24-year-old Columbia valedictorian who graduated at 19, built one of the most audacious bets in finance around a single idea: that artificial general intelligence was arriving fast, and whoever understood that first would get rich. His hedge fund, Situational Awareness — named after his viral 165-page manifesto predicting AI would trigger one of the 'most intense and volatile moments of human history' — eventually managed $45 billion in assets, backed by Jane Street, Stripe co-founders Patrick and John Collison, and a constellation of Silicon Valley true believers.

Aschenbrenner's rise was a product of relentless networking inside a tightly wound ideological community. After graduating Columbia, he worked at Sam Bankman-Fried's FTX Future Fund in the Bahamas — sharing 17 Signal group chats with the now-convicted crypto founder — before landing at OpenAI on Ilya Sutskever's AI alignment team. He was fired from OpenAI after sharing what executives deemed sensitive information with Holden Karnofsky, a prominent effective altruist married to Anthropic president Daniela Amodei. Aschenbrenner refused a nearly $1 million equity payout rather than sign the accompanying NDA. OpenAI disputes his account of the firing.

At Situational Awareness, his portfolio was a concentrated, highly leveraged bet on the AI supply chain — semiconductors, energy, data centers, and private stakes in companies like Anthropic, CoreWeave, and Cerebras. The fund borrowed roughly $3 for every $1 of capital, a leverage ratio that outpaced peers exposed to similar volatility. His Anthropic connections ran deep: he married Avital Balwit, chief of staff to Anthropic CEO Dario Amodei, in a wedding attended by Amodei himself, Anthropic's chief scientist Jared Kaplan, and other top executives.

The fund collapsed in July, two days before the wedding, when the market was rattled by the release of powerful, cheap AI systems from China. The tech selloff brutalized Aschenbrenner's concentrated, leveraged book. Securities regulators have since opened an investigation into the fund's trading activity, though no formal allegations of wrongdoing have been made. Wall Street veterans read it as a classic hubris story — an inexperienced operator with no prior investing track record, armed with ideology and insider access, taking on too much risk. In Silicon Valley, his status among AI zealots has barely dimmed.