How Leopold Aschenbrenner built a $45 billion AI hedge fund

Live updates

1. 2h ago

   Leopold Aschenbrenner's $45B AI hedge fund collapses

   Leopold Aschenbrenner's hedge fund, Situational Awareness, which managed $45 billion, collapsed after losing 67 percent of its portfolio in July due to excessive leverage, not a flawed AI thesis. Citadel acquired the fund's stock portfolio during a period of market doubt regarding AI infrastructure stocks. Aschenbrenner's reputation as an AI expert was bruised but market pros believe he can stage a comeback.

   Why it matters

   The collapse of Situational Awareness highlights the risks of excessive leverage in hedge funds, even those with successful strategies. The AI market has been volatile, with a $3 trillion rout. Aschenbrenner's story serves as a cautionary tale for margin traders and investors in AI stocks.

   What is confirmed

   • Leopold Aschenbrenner's hedge fund, Situational Awareness, managed $45 billion.
   • The fund lost 67 percent of its portfolio in July.
   • Excessive leverage, not a flawed AI thesis, drove the fund's collapse.
   • Citadel acquired the fund's stock portfolio.
   • The AI market experienced a $3 trillion rout.

   Still unconfirmed

   • Leopold Aschenbrenner raised $100 million to launch the fund in 2024.
   • Aschenbrenner sold $20 billion in stock to survive.
   • Aschenbrenner was planning his wedding as the fund lost $13 billion in AI bets.

   What to watch next

   • Leopold Aschenbrenner's future investment ventures
   • Performance of AI infrastructure stocks
   • Regulatory scrutiny of hedge fund leverage practices
   Sources used for this update (4)

   1. www.businessinsider.com — 'We shouldn't grave dance:' Market pros say don't count Leopold Aschenbrenner out after his hedge-fund blowup
   2. www.entrepreneur.com — This 24-Year-Old Hedge Fund Prodigy Was Called the ‘Nostradamus of AI’— He Didn’t See a 73% Drop Coming.
   3. biz.heraldcorp.com — Hedge fund loses $13b on AI bets — and its founder was planning his wedding
   4. www.aol.com — He was up 439% for the year and still got wiped out — here's the brutal leverage math every margin investor should see
   confidence 90%
2. 1d ago

   Citadel Acquires Portfolio of Collapsed AI Fund Situational Awareness

   Citadel has purchased the stock portfolio of Situational Awareness, a hedge fund founded by former OpenAI researcher Leopold Aschenbrenner. The fund, which managed $45 billion, collapsed after losing 67 percent of its portfolio in July following margin calls. Despite Aschenbrenner's reputation as an AI expert, the fund's failure was driven by excessive leverage rather than a flawed AI thesis. The acquisition by Citadel occurred during a period of broader market doubt regarding AI infrastructure stocks, helping to stem a $3 trillion AI rout.

   Why it matters

   Leopold Aschenbrenner was viewed as a prodigy in the AI trade before his fund's rapid decline. The failure highlights the risks of high leverage in volatile tech sectors. It serves as a cautionary example of how technical foresight does not guarantee financial risk management.

   What is confirmed

   • Leopold Aschenbrenner founded the hedge fund Situational Awareness.
   • Situational Awareness managed $45 billion before losing most of it in days.
   • The fund's portfolio declined 67 percent in July.
   • Citadel bought the stock portfolio of Situational Awareness.
   • The fund's collapse was triggered by margin calls.

   Still unconfirmed

   • Aschenbrenner retained a significant Anthropic position.

   What to watch next

   • Details of the final purchase price paid by Citadel for the portfolio.
   • Legal or regulatory actions resulting from the fund's collapse.
   Sources used for this update (24)

   1. WSJ — Exclusive | Citadel Buys Situational Awareness’s Stock Portfolio After Big Losses in AI
   2. The Verge — Maybe we shouldn’t give 24-year-olds billions of dollars to bet on AI
   3. The New York Times — A.I. Hedge Fund Situational Awareness Rescued by Rival Citadel
   4. ft.com — How Leopold Aschenbrenner, the ‘golden child’ of the AI trade, was laid low
   5. Bloomberg.com — The 24-Hour Race to Salvage Situational Awareness’ AI Bets
   6. CNBC — How Leopold Aschenbrenner built a $45 billion AI hedge fund — and lost most of it in days
   7. cnbc.com — Why Situational Awareness hedge fund imploded, even in a tame stock market
   8. CNN — The market’s big AI doubts are exposing the riskiest players | CNN Business
   9. WSJ — His Wedding Guests Were Arriving—Just as His $45 Billion Fund Was Falling Apart
   10. qz.com — Leopold Aschenbrenner's AI hedge fund collapses after margin calls
   11. Business Insider — Leopold Aschenbrenner’s meltdown helped AI stocks soar. It likely came too late to save other funds’ July returns.
   12. Bloomberg.com — Griffin’s Knack for Sniffing Out Trouble Set to Reward Citadel
   confidence 90%
3. 1d ago

   Citadel Acquires Stock Portfolio of Collapsed AI Fund Situational Awareness

   Citadel has purchased the stock portfolio of Situational Awareness, an AI-focused hedge fund founded by former OpenAI researcher Leopold Aschenbrenner. The fund, which managed $45 billion, collapsed after losing 67 percent of its value in July. The failure was driven by excessive leverage and margin calls rather than a flaw in the fund's AI thesis. Aschenbrenner issued a public apology to investors, stating, "We let you down," following the near-collapse and subsequent fire sale of assets to the rival firm.

   Why it matters

   Aschenbrenner was regarded as a prodigy in the AI trade before his fund imploded. This event coincided with a broader market shift where investors began pulling back from AI infrastructure stocks. The rescue by Citadel is credited with helping to stem a $3 trillion AI rout.

   What is confirmed

   • Leopold Aschenbrenner founded the AI hedge fund Situational Awareness.
   • The fund managed $45 billion before losing most of it in days.
   • Situational Awareness lost 67 percent of its portfolio value in July.
   • Citadel purchased the stock portfolio of Situational Awareness.
   • The fund's collapse was triggered by margin calls and leverage.

   Still unconfirmed

   • Aschenbrenner retained a significant Anthro position.

   What to watch next

   • Details on the final sale price paid by Citadel for the portfolio.
   • Potential regulatory investigations into the fund's leverage practices.
   Sources used for this update (24)

   1. WSJ — Exclusive | Citadel Buys Situational Awareness’s Stock Portfolio After Big Losses in AI
   2. The Verge — Maybe we shouldn’t give 24-year-olds billions of dollars to bet on AI
   3. The New York Times — A.I. Hedge Fund Situational Awareness Rescued by Rival Citadel
   4. ft.com — How Leopold Aschenbrenner, the ‘golden child’ of the AI trade, was laid low
   5. Bloomberg.com — The 24-Hour Race to Salvage Situational Awareness’ AI Bets
   6. CNBC — How Leopold Aschenbrenner built a $45 billion AI hedge fund — and lost most of it in days
   7. cnbc.com — Why Situational Awareness hedge fund imploded, even in a tame stock market
   8. CNN — The market’s big AI doubts are exposing the riskiest players | CNN Business
   9. WSJ — His Wedding Guests Were Arriving—Just as His $45 Billion Fund Was Falling Apart
   10. qz.com — Leopold Aschenbrenner's AI hedge fund collapses after margin calls
   11. Business Insider — Leopold Aschenbrenner’s meltdown helped AI stocks soar. It likely came too late to save other funds’ July returns.
   12. Bloomberg.com — Griffin’s Knack for Sniffing Out Trouble Set to Reward Citadel
   confidence 95%