Situational Awareness, a hedge fund formed by former OpenAI researcher Leopold Aschenbrenner, has sold the majority of its public stock portfolio to Ken Griffin’s Citadel following steep losses over the past month, the Wall Street Journal reported earlier on Thursday. It’s a big comedown for the rising star who has been described as both “scarily smart,” and “brash.”

German-born Aschenbrenner, who is 25, had no prior trading experience before launching the fund in 2024. He gained prominence for his investment thesis after publishing essays arguing that scaling AI would require a major build-up in semiconductors, compute, memory, and energy infrastructure.

He joined OpenAI’s “superalignment” team in 2023, two years after graduating as valedictorian from Columbia at 19 (he enrolled at age 15). But he was dismissed from the company a year later over what it described as an improper disclosure of internal information. At the time, that team was led by OpenAI co-founder Ilya Sutskever and AI researcher Jan Leike. Soon after, Sutskever left to start his own company, Leike joined rival Anthropic, and Aschenbrenner launched his fund.

Things couldn’t have been going better for Situational Awareness until very recently. The fund returned 439% for the year through June, the Financial Times reported. Assets under management reportedly grew to as much as $45 billion during their peak before the fund’s positions began dropping sharply amid a broader decline in AI infrastructure investments, CNBC reported.

Even after losses mounted, Aschenbrenner didn’t flinch. In a July 24 letter to investors seen by the FT, he called the selloff one of the best buying opportunities since early last year and invited clients to commit fresh capital starting August 1. According to Bloomberg, the appeal didn’t garner the commitments he’d hoped would materialize.

Some of the hardest-hit stocks held by the fund included memory chip producers SK Hynix and SanDisk, clean energy developer Bloom Energy, and neocloud provider Nebius Group, all of which have plummeted by more than 30% over the past month. AI infrastructure equities fell as public investors grew concerned that massive capital expenditures weren’t translating into near-term revenue. The fund’s losses were amplified by leverage, a common hedge fund strategy of using borrowed money to buy stocks.

After Citadel bought the bulk of those holdings, Situational Awareness’ overall assets fell to roughly $10 billion, Bloomberg reported, down from around $20 billion in recent months, per an earlier WSJ report.

Situational Awareness raised several hundred million dollars at its outset. Early backers of the fund include quant-trading firm Jane Street, Stripe co-founders Patrick and John Collison, and Meta executives Daniel Gross and Nat Friedman.

Citadel’s purchase fits a familiar pattern for Citadel. Ken Griffin’s hedge fund has a reputation for stepping in to snap up attractive assets when leveraged players are having to unwind themselves. Even before picking up some of Situational Awareness’s holdings, Citadel’s portfolio featured some of the same AI infrastructure bets, suggesting that, like Aschenbrenner, Griffin expects the sector to recover and has the ability to wait it out.

Situational Awareness did not, however, sell its investments in private companies, according to multiple reports. Most notably, it continues to hold a stake in Anthropic that’s right now valued at $5 billion, according to Bloomberg, and which many would view as an asset that continues to appreciate. Indeed, Anthropic was last valued at $965 billion in a Series H round in May, and it’s expected to go public as soon as October, potentially at an even higher valuation. It’s conceivable that a windfall from the sale of those shares could offset some of the hedge fund’s public-market losses.

Other private investments in the portfolio of Situational Awareness include chipmaker MatX and AI data center startup Fluidstack, which was reportedly in talks in April to raise a new round at an $18 billion valuation.

TechCrunch has reached out to Aschenbrenner for comment.

As the generative AI boom drives steep demand for hardware components, Apple and other hardware makers are facing what outgoing CEO Tim Cook calls “a hundred-year flood [on] memory pricing,” which is severely impacting the cost of producing iPhones, MacBooks, and other devices.

Apple described its recent earnings report as its “strongest June quarter ever,” with iPhone and Mac sales performing better than expected, growing 22% and 29% respectively year over year. Yet the company is bracing for memory shortages, known as RAMageddon, to get even worse. Apple’s biggest challenge is securing the advanced memory nodes used in its Apple silicon chips, which power the A-Series and M-Series processors used in iPhones and Macs.

“We continue to expect high levels of demand. However, with less flexibility in supply chain, we expect the impact from the supply constraints to increase significantly sequentially,” Cook said on Apple’s quarterly earnings call. “We’re seeing some very significant constraints currently with limited flexibility in the supply chain to remedy it.”

Apple is evidently worried enough about supply shortages that it reported $11.1 billion in inventory, nearly double the $5.7 billion it reported last September. This marks a break from Cook’s long-held supply chain approach, which has emphasized minimizing how much inventory Apple has on hand.

These constraints led Apple to “reluctantly” raise the price of Macs and iPads last month, Cook added. Other companies that have raised hardware prices include Meta, Samsung, Microsoft, and Sony.

“We’re going to be scrambling on the supply side, essentially,” Cook said.

For the upcoming quarter, Apple is predicting revenue growth between 9% and 11% year over year. But in the last several quarters, Apple has maintained about 16% year-over-year growth. Of course, that worries investors — Apple stock dropped 6% in after-hours trading.

When Senior VP of Hardware Engineering John Ternus steps into the CEO role in September, the company could be facing a rough patch, but at least Apple isn’t alone in its supply struggles.

Apple says it has now topped 1.5 billion subscribers for its services business, up from 1 billion in January 2025. However, this segment of Apple’s business, which includes the Apple Store, AppleCare, music, video, and cloud services, was the only miss in what was otherwise a record-breaking quarter for the company’s hardware sales.

In Apple’s fiscal third quarter, the company reported $30.74 billion in services revenue, falling short of the $31.22 billion Wall Street analysts had expected. Combined with a miss in China, Apple’s stock tumbled over 4% in after-hours trading.

When asked to dive into what led to the decline in services revenue, Apple CFO Kevan Parekh pointed to several factors. Most notable, however, were the impacts on Apple’s cash cow, the App Store.

One factor contributing to the App Store’s performance in the quarter was a slowdown in mobile gaming. It also called out the App Store business model changes in certain countries, including the U.S.

The latter is a reference to Apple being under a court order that requires it to now allow app developers to process customer payments outside the App Store — and outside the reach of Apple’s commission. While Apple didn’t say to what extent this specific issue had impacted App Store revenue, it did remind investors that the matter will be heard by the Supreme Court for a final decision.

The company didn’t fully blame App Store issues for the services revenue miss. Other factors included foreign exchange, which Apple claimed was the main driver, as well as a comparison to prior quarters where Apple was raking in money from the success of its F1 theatrical release.

Overall, the App Store still set a June quarter revenue record, Apple noted, but that total figure also includes revenue from Apple Ads, which have become a more significant part of Apple’s business, and recently expanded to Apple Maps.

Despite these issues — and other “headwinds” attributed to foreign exchange rates — Apple touted the potential for growing its services business in the future.

It noted the segment set an all-time revenue record in developed markets and a June quarter record in emerging markets. It also said the total services business saw double-digit revenue in the “vast majority” of markets Apple tracks.

“Our services continue to attract more customers, and we have now surpassed one and a half billion in paid subscriptions. Both transacting and paid accounts reached new all-time highs in the quarter, with double-digit growth for both in emerging markets,” said Parekh.

The company also shared that specific segments were doing particularly well, including Apple Ads, App Store, AppleCare, Apple Music and Apple TV, which saw June quarter records, as well as cloud and payment services, which hit all-time highs. Apple TV additionally saw its viewership reach an all-time high in the quarter.

Apple also reminded investors of potential new services revenue streams, including the newer Creator Studio subscriptions and the upcoming bill-splitting features in Apple Cash, which could deepen customers’ engagement with Apple’s payments ecosystem.

This week’s launch of the Apple Upgrade program, in partnership with Klarna, could drive other increases in services revenue too, especially if it drives more people to buy an iPhone or other Apple device, adding on services to their bill.