On July 30, Citadel swooped in to buy a massive $16 billion block of AI-focused public equities from Situational Awareness, a hedge fund facing a margin call that threatened to unload its holdings onto the market. This quick intervention stopped a potential fire sale of key AI infrastructure stocks, keeping the sector from plunging deeper amid recent volatility.
Situational Awareness was once a standout in hedge fund circles. Founded by Leopold Aschenbrenner in his mid-20s, the fund quickly grew to $45 billion in assets by early July 2026, betting heavily on AI infrastructure companies like SK Hynix and CoreWeave. These firms are key players powering the hardware and computing backbone fueling AI development.
But the volatility in AI stocks hit hard. With leveraged positions magnifying losses, the fund’s value plummeted to about $10 billion within weeks, triggering margin calls from prime brokers. Left to sell shares quickly, the fund risked dragging down prices across the sector in a disorderly selloff.
Wall Street’s biggest players jumped into action. An overnight auction involved several bidders, but Citadel clinched the deal, buying most of the public equities at a negotiated discount. Goldman Sachs and JPMorgan helped coordinate the transaction, ensuring it happened smoothly despite high pressure.
This move acted like a circuit breaker for the AI stock market. Shares of SK Hynix, CoreWeave, and others avoided a sharp crash that would have rippled across AI infrastructure. Meanwhile, Situational Awareness kept its private investments, including stakes in AI safety firm Anthropic.
