July 31, 2026, (Inside AI) — Situational Awareness, the AI-focused hedge fund led by former OpenAI researcher Leopold Aschenbrenner, has sold the majority of its public equities portfolio to Ken Griffin's Citadel. Two sources familiar with the matter confirmed the transaction, which follows heavy losses in tech holdings amid a broader AI stock rout.
The fund was under pressure to either raise fresh capital or offload its entire book, ultimately opting to unwind most of its public stock positions. Citadel, managing about $71 billion in assets, acquired the leveraged portion of Situational's portfolio. Post-deal, Situational retains roughly $10 billion in assets, including private investments such as its stake in Anthropic, which was not sold.
Situational's recent regulatory filings showed holdings in Broadcom, Intel, and CoreWeave. The fund had posted a staggering 439% return from the start of the year through June, fueled by Aschenbrenner's prescient AI bets. That performance, however, reversed sharply as AI stocks tumbled, triggering margin pressures across the industry.
Top prime brokers including Goldman Sachs, JPMorgan Chase, Bank of America, and Citigroup facilitated the deal. The transaction underscores how rapidly fortunes can shift in leveraged tech strategies. Aschenbrenner's fund, which once managed about $20 billion with roughly 20 employees, had attracted backers like Jane Street, Stripe co-founders Patrick and John Collison, and Meta executives Daniel Gross and Nat Friedman.
Leverage Amplifies Both Gains and Losses
Hedge funds routinely use leverage to magnify returns, but this practice can backfire when markets turn. As AI stocks sold off, many funds faced margin calls, forcing them to sell positions and deepening the downturn. A Morgan Stanley prime brokerage note from Wednesday indicated that stock-picking hedge funds were unwinding AI positions rapidly, covering shorts and selling longs in near-equal measure.
Global hedge funds are on track for their largest monthly drawdown on record. Goldman Sachs reported that Asia-focused fundamental long-short funds were down 18.6% on average this month through July 28. It remains unclear whether Situational faced specific margin calls before the Citadel deal, but the fund's use of leverage was consistent with industry norms.
The mechanics of such unwinds can create a vicious cycle: margin calls trigger sales, which depress prices further, leading to more margin calls. This dynamic has played out in previous tech selloffs, but the speed and concentration of AI bets have intensified the impact. A recent academic analysis of hedge fund leverage during market stress highlights these systemic risks (National Bureau of Economic Research study on hedge fund leverage).
AI's Concentrated Risk Exposed
Citadel's acquisition of Situational's public portfolio signals both distress and opportunity. By absorbing the leveraged book, Citadel may be positioned to benefit from a rebound or to manage the assets through its sophisticated risk framework. For Aschenbrenner, the deal preserves the fund's private investments and allows it to avoid a fire sale, though it marks a dramatic reversal from earlier success.
The rout has erased much of the gains from crowded AI trades, raising questions about the sustainability of concentrated bets in a sector that remains volatile. While Aschenbrenner's early calls on AI were lauded, the speed of the drawdown reveals how quickly sentiment can shift. The fund's retention of its Anthropic stake suggests continued conviction in private AI ventures, even as public markets repriced risk.
Other large tech-focused funds have also been hit, but Situational's rapid ascent and fall make it a cautionary tale. The involvement of multiple prime brokers underscores the interconnectedness of modern finance, where a single fund's unwind can ripple through the system. Official data on hedge fund leverage from the Financial Stability Board provides broader context on these vulnerabilities (FSB report on non-bank financial intermediation).
As the dust settles, the deal highlights the delicate balance between aggressive growth and risk management in AI investing. The fund's remaining $10 billion portfolio, split between stocks and private holdings, will be closely watched. For now, the fire sale to Citadel offers a lifeline, but the episode may temper enthusiasm for highly leveraged AI strategies.
