SEC Subpoenas Major Banks in Probe of $45 Billion 'Situational Awareness' Hedge Fund Collapse

When a $45 billion hedge fund loses 77% of its value in a matter of weeks, the immediate assumption across trading desks is that the underlying asset class is fundamentally broken. But the near-collapse of Situational Awareness, the AI-focused fund founded by 25-year-old former OpenAI researcher Leopold Aschenbrenner, was not a failure of artificial intelligence or a sudden reversal in the technology's commercial viability. It was a classic failure of leverage. The fund did not collapse because its core thesis was wrong; it collapsed because it borrowed too much money to express that thesis, leaving it entirely exposed to a routine market correction.[6][7]

The U.S. Securities and Exchange Commission has now launched a formal investigation into the mechanics of that failure, issuing subpoenas to the major Wall Street banks that handled the fund's trading and provided its financing. The regulator is seeking detailed records on the timing of the fund's trades, its use of borrowed money, and its communications with lenders in the days leading up to its forced liquidation. The inquiry aims to determine exactly how a fund managed by a small team with limited traditional investing experience was able to secure the massive credit lines that fueled its rapid rise and subsequent fall.[1][2]

At its peak in early July 2026, Situational Awareness managed roughly $45 billion in assets, built on highly concentrated bets in AI infrastructure and semiconductor stocks like SK Hynix, SanDisk, and CoreWeave. To magnify those returns, the fund reportedly utilized leverage of up to 400 percent, borrowing tens of billions of dollars from prime brokers. The subpoenas specifically name Goldman Sachs, JPMorgan Chase, Citigroup, and Bank of America as the institutions whose records are being sought, though the banks themselves have declined to comment on the regulatory outreach.[3][5]

When global semiconductor stocks experienced a sharp, sudden sell-off in late July, that 400 percent leverage transformed from a return multiplier into a fatal liability. As the value of the fund's underlying collateral plummeted, its lenders issued aggressive margin calls, demanding immediate additional capital to secure the borrowed funds. Unable to meet those massive cash demands, Situational Awareness was forced to liquidate the bulk of its public equities portfolio at a steep discount, ultimately selling the distressed positions to Ken Griffin's Citadel to satisfy its creditors.[2][6]

The SEC's inquiry is currently in its early stages, and the issuance of subpoenas does not necessarily indicate that any legal wrongdoing occurred. Rather, investigators appear focused on reconstructing the precise sequence of events that led to the margin calls. The agency is examining whether the fund accurately disclosed its risk profile and concentration limits to its counterparties, and conversely, whether the banks properly managed and stress-tested their own exposure to a single, highly leveraged client operating in a notoriously volatile sector.[2][5]

A spokesperson for Situational Awareness addressed the probe directly, stating that regulatory scrutiny is entirely expected following such a high-profile and dramatic drawdown. The representative added that the firm is a highly regulated business and will cooperate to the fullest extent with any regulatory request. To date, the fund has not been accused of any legal violations, and the SEC has not publicly announced a formal enforcement action against Aschenbrenner or his firm.[2][3]

For the broader financial market, the investigation highlights the systemic risks posed by concentrated, debt-fueled trading strategies, regardless of the underlying asset. While the core AI companies in the fund's portfolio continue to report strong earnings and robust capital expenditures, the rapid, forced unwinding of Situational Awareness sent shockwaves through the market. The sheer volume of the fund's liquidation exacerbated the July tech sell-off, triggering secondary margin calls for retail investors and other funds that were crowded into the exact same semiconductor names.[4][7]

The regulatory action also signals a potential shift in how the SEC views the intersection of emerging technology narratives and traditional prime brokerage. By targeting the major banks that enabled the fund's massive bets rather than just the fund itself, the SEC is effectively scrutinizing the guardrails of the banking system. The core question for regulators is no longer just what Situational Awareness was buying, but why Wall Street's premier risk managers were willing to finance tens of billions of dollars in concentrated tech bets for a 25-year-old founder with no prior hedge fund experience.[3][5]