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Leopold Aschenbrenner’s $20 billion AI fund is basically falling apart. Situational Awareness, the hedge fund he launched in 2024, is now facing forced liquidations, margin calls, and talks with investment bankers about an orderly wind-down.
The collapse came fast. The fund had grown by 1,000% since its inception, and as recently as June 2026 it was still up 439% net of fees for the year. That’s not a small number — that’s the kind of performance that makes investors overlook risk. But July changed everything. AI stocks including Sandisk, Nebius Group, and SharonAI Holdings dropped at least 30% in a sharp market selloff, and the fund’s heavy use of leverage turned those losses into something much worse. A 3x leveraged position in stocks that fall 30% doesn’t leave you with 10% — it wipes you out entirely. That’s the math that’s now haunting Aschenbrenner.
Ken Griffin’s Citadel reportedly stepped in and acquired the majority of Situational Awareness’s stock portfolio.
Leverage, Anthropic, and a $13.7 Billion Filing
The fund’s most recent SEC filing, dated March 31, 2026, listed 42 positions valued at $13.7 billion. A significant chunk of that was tied to Anthropic, the AI company, which made up a notable portion of the fund’s assets. Concentrated bets on AI companies were pretty much the whole strategy — and it worked spectacularly until it didn’t.
There’s also the SK Hynix angle. Situational Awareness held a stake tied to SK Hynix’s US listing through American Depositary Receipts. Those ADRs closed roughly 15% below their initial offering price, adding another layer of pain on top of the broader AI stock selldown. Aschenbrenner, for his part, apparently told investors in recent communications that the downturn represented buying opportunities. Whether that’s genuine conviction or a desperate attempt to hold the line — unclear.
An upcoming SEC filing expected in mid-August will cover the fund’s July positions. That filing is probably going to be ugly. Investors and analysts are already watching for it closely, expecting it to lay bare just how much damage the month’s volatility caused.
Meanwhile, Aschenbrenner is reportedly seeking additional funding to stabilize things. Cash injections for margin calls are already in motion. Whether fresh capital actually arrives in time is another question entirely.
A Career Defined by High-Stakes Collapses
Aschenbrenner’s background makes this story harder to ignore. He worked on FTX’s Future Fund, an effective altruism initiative backed by Sam Bankman-Fried. He left FTX in November 2022 — one day before the company filed for bankruptcy, as it turned out — after Bankman-Fried’s fraud and the misappropriation of customer funds came to light. FTX and its sister firm Alameda Research collapsed together in one of the most spectacular blowups crypto has seen.
After FTX, he landed at OpenAI. That didn’t last either. He was dismissed following a data leak incident. He then raised several hundred million dollars and founded Situational Awareness, betting heavily on the AI boom.
And the bet worked — for a while. The fund reached a peak valuation of $20 billion, driven largely by sky-high AI stock valuations. But that $20 billion figure was always somewhat abstract, a product of market prices rather than cash in hand. The current situation doesn’t reflect anything close to that number.
What makes this particularly striking is the personal dimension. Aschenbrenner reportedly put nearly all of his personal net worth into Situational Awareness. So the fund’s collapse isn’t just a professional setback — it’s a potential wipeout of his own finances. That’s a level of personal exposure that most fund managers would never accept, and it says something about how confident he was in the AI trade.
High leverage, concentrated positions, a single-theme bet on AI stocks — it’s a strategy that can make you look like a genius and then destroy you inside of a month. The fund went from 439% gains through June to fighting for survival by late July.
The August SEC filing will be the next hard data point. 42 positions worth $13.7 billion as of March — the question now is what’s left.
Frequently Asked Questions
What caused Situational Awareness to face collapse?
AI stocks including Sandisk, Nebius Group, and SharonAI Holdings fell at least 30% in July 2026, triggering margin calls on the fund’s heavily leveraged positions and forcing liquidations.
Who acquired Situational Awareness’s stock portfolio?
Ken Griffin’s Citadel reportedly acquired the majority of Situational Awareness’s stock portfolio during the fund’s crisis.
