Citadel Quickly Unwound Most Of A Troubled AI Hedge Fund Book

Situational Awareness, an artificial intelligence-focused hedge fund founded by Leopold Aschenbrenner, a former OpenAI researcher, underwent a rapid and significant deleveraging in August 2026 following catastrophic losses across its core positions. The fund, which had grown to $45 billion in assets at the beginning of July, contracted to approximately $10 billion as losses mounted on concentrated long positions in AI infrastructure stocks and deteriorating short positions in software equities. According to sources familiar with the matter, the portfolio sustained a 67% decline in July alone, representing one of the largest monthly drawdowns in recent hedge fund history.

The fund faced acute liquidity pressures driven by margin calls from multiple prime brokers. Bank of America, Goldman Sachs, and JPMorgan Chase coordinated with Situational Awareness to facilitate an orderly reduction of positions, both on the long and short sides of the portfolio. The fund's primary vulnerabilities centered on significant exposure to AI-related semiconductor plays—particularly SK Hynix—while simultaneously maintaining substantial short positions in software companies such as Adobe that moved sharply against the fund's thesis.

Citadel, the multi-billion dollar hedge fund operated by Kenneth Griffin, emerged as the counterparty to acquire the bulk of Situational Awareness's publicly traded assets. The transaction provided critical liquidity to Situational Awareness and prevented a disorderly fire-sale that could have triggered broader market dislocation. While the specifics of valuation and timing remain partially opaque, sources indicate the deal was structured to allow Aschenbrenner's fund to satisfy margin requirements across its prime brokers while preserving certain illiquid or strategic positions, such as its investment in Anthropic, though Situational Awareness disputed reports that it was actively marketing its Anthropic stake.

The episode underscores elevated leverage and concentrated positioning risks within specialized hedge fund strategies, particularly those focused on emerging technology sectors with high volatility and liquidity constraints. The speed and scale of the deleveraging—from $45 billion to $10 billion in a single month—highlights both the inherent fragility of leveraged long-only AI bets during sector corrections and the critical role of prime broker coordination in preventing systemic liquidity events. The outcome, facilitated by Citadel's acquisition of distressed positions, likely prevented cascading losses and broader contagion across the institutional investment community.