Key points
- SK Hynix's $28 billion Nasdaq debut named three cornerstone investors on July 10. One was Leopold Aschenbrenner's Situational Awareness, which sold its levered public US stock book to Citadel on July 30 and kept its private holdings, including its Anthropic stake.
- The prospectus calls the $7 billion a non-binding indication of interest shared across Baillie Gifford, Coatue and Situational Awareness, and says any of them may buy more, fewer, or no shares.
- Four disclosure routes could carry the answer. The March portfolio report predates the deal, the June-quarter report closes nine days before pricing, the 5 percent ownership trigger sits out of reach at 2.5 percent, and foreign issuers are exempt from insider reports.
- The fund's September-quarter report, due around November 16, is the first document that can speak to it.
I reread filings when the story around them changes, and SK Hynix's American listing prospectus earned one this week.
On Thursday, Leopold Aschenbrenner's Situational Awareness sold its levered public stock book to Ken Griffin's Citadel in a single block, keeping the private side of the fund and its stake in Anthropic. His letter to investors, reported by Reuters, puts July down 67 percent and the year up 80 percent, following a 439 percent first half. The word going around is a blowup. The arithmetic says a very good year with a terrible month inside it.
Three weeks before that block trade, the same fund's name sat on the cover of the largest first-time American fundraising any foreign company has completed. So I went looking for the size of its SK Hynix stake. The filings stay quiet on it until November.
What the cover page actually says
SK Hynix priced 177.9 million American depositary shares at $149 on July 9 and filed its final prospectus the next morning on a form called a 424B4. The cover names three Cornerstone Investors: Baillie Gifford, Coatue Management, and Situational Awareness Partners LP.
The sentence that follows them is worth reading twice, because it's doing less work than it appears to. The three funds have indicated an interest in buying up to $7 billion of the shares, and because those indications are not binding agreements or commitments to purchase, any of the three may determine to purchase more, fewer, or no ADSs.
The $7 billion is also a ceiling for all three funds together, about a quarter of the raise. It's a shared number, so treating it as Aschenbrenner's own overstates his end of it by a wide margin. We corrected our own July 7 story on that point today.
Two file numbers, one portfolio
The prospectus names Situational Awareness Partners LP. The fund most people follow, the one behind the widely quoted $13.7 billion portfolio, files as Situational Awareness LP. Those are two separate registrants at the SEC with two EDGAR identifiers and two portfolio-report file numbers, 028-24925 and 028-26981.
They're describing the same money. Both filed a holdings report for March 31 listing 42 positions worth $13,676,657,577, and all 42 lines match on share count. Each filed a full report where one of them would normally file the short notice that points a reader from one registrant to the other. That's how a single portfolio ends up looking like two, and added together it reads as $27.4 billion, double the real figure.
Where a $7 billion stake would show up
American funds disclose large stock positions through a handful of forms, and every one of them carries a date. Walk the calendar and the SK Hynix stake falls into the gaps between them.
The quarterly holdings report both registrants filed covers March 31, more than three months before SK Hynix priced. The June-quarter report is due August 14 and closes its books on June 30, nine days before pricing. Both land ahead of the moment the stake could exist.
The 5 percent ownership reports come next, and here it's the arithmetic that decides. SK Hynix sold 177.9 million depositary shares, and ten of those stand for one ordinary share. So the entire American offering represents 17.8 million shares against the 709,854,891 the company has outstanding. That works out to 2.5 percent of the company.
A buyer who took every share of the largest listing of its kind would still finish at half the 5 percent line that triggers an ownership filing.
Insider reports close the last route. SK Hynix files with the SEC as a foreign private issuer, and that category carries an exemption from the ownership forms American company insiders turn in within two business days. What remains is the September-quarter holdings report, due around November 16.
Seoul and New York spent Friday in different worlds
If you checked the stock this week, you'd have watched two markets react on separate schedules. Seoul trades from 9:00 a.m. to 3:30 p.m. Korea time. In July that puts its closing bell at 2:30 a.m. Eastern, hours before New York opens.
SK Hynix's Seoul shares closed Friday at 1,718,000 won, up 29.95 percent from Thursday and pinned at the 30 percent daily limit the Korean exchange allows. Samsung Electronics gained 26.8 percent and the Kospi index rose 17.9 percent, recovering from a week that had taken the index down about 21 percent in five sessions.
The American shares barely moved, and that's where the two markets separate. SKHY traded near $147.14 at 2:20 p.m. Eastern, about 1.2 percent below Thursday's close of $149.00. At Friday's rate of 1,442.62 won to the dollar, Seoul's price works out to roughly $119.09 per depositary share. That leaves the American listing about 24 percent above the Korean one. The gap was much wider on Thursday, and Seoul's limit-up session narrowed it by climbing while New York stood still.
What November can settle
The September-quarter report will show whether Situational Awareness held SK Hynix depositary shares on September 30, and how many. It captures the portfolio after the sale to Citadel, so it also shows what came through that week intact.
How much of the public book went in that block is itself unsettled, and it matters here. We laid the disagreement out in our piece on who bought the book and what the filings can prove. If an unlevered set of long positions survived the week, an SK Hynix stake could be sitting inside it today.
A quarterly report is a photograph of a single date. A position bought in July and sold before September 30 leaves the record untouched, so November can confirm a surviving stake while the question of what got bought at the listing stays open for good.
Until then, the size of Aschenbrenner's SK Hynix stake rests on a cover page that committed to very little. Our explainer on what a 13F filing captures and leaves out covers the mechanics, and the fund's March portfolio is broken out in our look at the 19 stocks it owned outright.
Sources
- SK Hynix Inc., 424B4 final prospectus, filed July 10, 2026 (cornerstone language, share counts)
- Situational Awareness LP, EDGAR filing history, CIK 0002045724
- Situational Awareness Partners LP, EDGAR filing history, CIK 0002038540
- Reuters, Situational Awareness portfolio sinks 67% in July, letter shows (July decline, 80 percent year to date)
This is general market commentary and opinion, not investment advice.
