A stock just surged on news Situational Awareness had bought it. But its current fate is unclear.

By Steve Goldstein

Taiyu Yuden stock soared on Wednesday.

Financial market disclosures made by Situational Awareness, the once-soaring hedge fund that had to liquidate its portfolio of stocks, moved a stock on Wednesday. But it's unclear whether the fallen hedge fund actually still owns the company whose stock it moved.

That rather uncertain conclusion is formed from a new document - or nine, to be precise - disclosed in Japan on Wednesday: it states that Situational Awareness, led by former OpenAI researcher Leopold Aschenbrenner, had as much as a 16.6% stake in a company called Taiyo Yuden.

Taiyo Yuden (JP:6976) is in the business of making what are called multilayer ceramic capacitors, which are used in smartphones, cars, industrial equipment, and crucially, AI servers.

It wasn't previously known that Situational Awareness, known for its acumen in picking AI stocks, had a stake of any size in the company. Taiyo Yuden soared 7.5% in Tokyo trade and was the best-performing stock in the Nikkei 225 JP:NIK.

That said - and other news outlets who just looked at the first form Situational Awareness filed may not have noticed - the hedge fund also disclosed it has more recently been selling the stock.

First there was a sale of 185,200 shares on July 28, then a larger 1.7 million share sale on July 30, and then a giant 14.6 million "off-market" sale on Aug. 3.

It was on July 30, according to the Wall Street Journal and other news outlets, that Citadel purchased Situational Awareness's portfolio of public equities, so the hedge fund could meet a margin call.

So from the disclosures, it's not clear what the current fate is of the remaining 4.4% stake. It could be in Situational Awareness's hands, or Citadel's, or maybe another party.

Taiyo Yuden is highly valued by investors, even if it's not a household name - according to FactSet, the company trades on a price-to-earnings ratio of 46.8.

-Steve Goldstein

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08-12-26 0422ET