How Leopold Aschenbrenner built a $45 billion AI hedge fund — and lost most of it in days
Leopold Aschenbrenner's AI hedge fund, Situational Awareness, collapsed from $45 billion to $10 billion in assets due to falling semiconductor stocks and margin calls. The 24-year-old manager was forced to sell off leveraged public stock bets to Ken Griffin's Citadel at a…
Intelligence analysis by Llama

Leopold Aschenbrenner's AI hedge fund, Situational Awareness, collapsed due to falling semiconductor stocks and margin calls. The 24-year-old manager was forced to sell off leveraged public stock bets to Ken Griffin's Citadel at a discount.
Leopold Aschenbrenner's AI hedge fund, Situational Awareness, was like a big bet on the future of technology. It grew really fast, but then it lost a lot of money because of problems with some of the companies it invested in. The manager, Aschenbrenner, had to sell off some of the investments to try and stop the losses. It's like a big game of poker, but with money instead of chips.
Analysis
A Meteoric Rise and Sudden Fall
Leopold Aschenbrenner's AI hedge fund, Situational Awareness, has been making headlines in recent weeks due to its dramatic collapse. The fund, which was launched in July 2024, had grown to a staggering $45 billion in assets, making it one of the largest and most successful AI-themed hedge funds in the industry. However, in a matter of days, the fund's assets plummeted to around $10 billion, leaving investors and analysts stunned.
The collapse of Situational Awareness is attributed to the fund's heavy exposure to falling semiconductor stocks and mounting margin calls. Aschenbrenner, the 24-year-old manager, was forced to sell off all of his leveraged public stock bets, including hard-hit names like SK Hynix and CoreWeave, to Ken Griffin's Citadel at a discount. This move was seen as a desperate attempt to stem the bleeding and prevent a complete collapse of the fund.
The story of Aschenbrenner's meteoric rise and sudden fall has captivated both Wall Street and tech circles, making him the most high-profile casualty yet of the volatility accompanying the AI boom. A polarizing figure, Aschenbrenner's online followers saw him as a genius of the next big thing and followed his fund's quarterly filings for clues on hot AI stocks. Before this month's decline, Situational Awareness racked up gains of more than 1,000% since inception, according to the Wall Street Journal.
However, critics have pointed out that Aschenbrenner had no experience running money prior to launching his fund in July 2024, calling him more lucky than smart. Some noted that his early work experience was at the doomed crypto firm FTX, where he helped now-disgraced founder Sam Bankman-Fried run a charity out of a Bahamas penthouse. Others on Wall Street, including former traders at global investment banks, noted that in light of reports Situational Awareness used as much as 400% leverage, the collapse wasn't shocking.
A Clearing Event?
The near-collapse of Situational Awareness coincides with the hedge fund manager's wedding, set for this weekend, sources told CNBC's David Faber. Aschenbrenner is engaged to Avital Balwit, chief of staff for Anthropic CEO Dario Amodei, according to a Fortune profile. The story of Aschenbrenner's meteoric rise and sudden fall has captivated both Wall Street and tech circles, making him the most high-profile casualty yet of the volatility accompanying the AI boom.
The Road Ahead
The collapse of Situational Awareness raises questions about the experience and qualifications of young fund managers. It also highlights the risks and challenges of investing in the AI sector. As the industry continues to evolve and grow, it is essential to have a clear understanding of the risks and challenges involved. The story of Leopold Aschenbrenner's AI hedge fund, Situational Awareness, serves as a cautionary tale for investors and fund managers alike.
Key points
- Leopold Aschenbrenner's AI hedge fund, Situational Awareness, collapsed from $45 billion to $10 billion in assets due to falling semiconductor stocks and margin calls.
- The 24-year-old manager was forced to sell off leveraged public stock bets to Ken Griffin's Citadel at a discount.
- Aschenbrenner had no experience running money prior to launching his fund in July 2024.
- The fund's heavy exposure to falling semiconductor stocks and mounting margin calls demonstrates the potential for significant losses in this area.
The collapse of Situational Awareness may signal a bottom for the AI trade, as forced selling can create buying opportunities. Additionally, the fund's manager, Leopold Aschenbrenner, has a strong track record of success and may be able to recover from this setback.
The collapse of Situational Awareness highlights the risks and challenges of investing in the AI sector. The fund's heavy exposure to falling semiconductor stocks and mounting margin calls demonstrates the potential for significant losses in this area. Furthermore, the manager's lack of experience and qualifications raises concerns about the fund's ability to navigate future challenges.


