Solidigm's IPO ceiling fell $50 billion in three days. SK Hynix's new US holders took the hit

July's buyers take the worst session in two weeks

SK Hynix fell 5% in Seoul on Monday, its biggest drop in two weeks, after Bloomberg confirmed↗ that Solidigm, its US storage unit, is weighing a US listing as soon as next year at as much as $100 billion ¹. The damage ran up the family tree: SK Square, the chipmaker's biggest holder, fell more than 8%, and SK Inc., which controls it, more than 6% ¹.

In New York, the ADRs priced at $149 in July slid 6% to $180.31, with Micron and Western Digital down 4% each and SanDisk down 5% ². They remain roughly 25% above the offer price, below the 9 September record of $198.63 ³.

Two ceilings, $50 billion apart, printed two days apart

The July offering raised about $26.5 billion, covered more than seven times↗ ⁴. On Friday 25 September, Reuters put Solidigm at as much as $150 billion↗, raising as much as $15 billion, with the banks already through their pitch meetings ⁵.

Bloomberg's confirmation arrived on Sunday 27 September, at as much as $100 billion ¹. Two ceilings, $50 billion apart, printed two days apart, and nobody involved has reconciled them. Monday's selloff traded on the smaller number ². Either would rank as the largest US semiconductor listing on record ⁵.

The grandchild structure keeps the keys in Seoul

Solidigm was placed under AI Company, a US investment subsidiary, earlier this year, making the unit a grandchild of the Seoul parent ¹⁶. The Korea Corporate Governance Forum warned in August that the extra layer deepens SK Group's pyramid ownership, and urged the company to drop the plan ¹. A grandchild listing raises dollars in New York without loosening one link in Seoul.

The ledger: $9 billion in, up to $100 billion out

Intel agreed in October 2020 to sell the NAND and SSD business for $9 billion, collecting $7.0 billion at the end of 2021 and about $1.9 billion, net of adjustments, at the final closing on 27 March 2025 ⁷.

The parent behind it: June-quarter revenue rose 257% year on year to 79.3 trillion won on a 76% operating margin, both records ⁷. SEC-filed March-quarter numbers↗: $34.9 billion of revenue, $25.0 billion of operating income ⁸. At the reported $15 billion raise, the lower ceiling sells 15% of Solidigm and the higher one 10% ⁵.

The bull case has a price and a use

"A US listing could unlock Solidigm's value and fund expansion, but SK Hynix shareholders would be giving up a portion of its future earnings," Jung In Yun, chief executive of Fibonacci Asset Management, said ¹. The key, he said, is valuation and the use of proceeds ¹. SK Hynix says it is reviewing options; nothing is confirmed ⁵.

Part of Monday's fall was oil rather than governance: Samsung and other chipmakers came under pressure as crude rose ¹. Why the confirmed ceiling came in $50 billion under Friday's talk, no one involved has said.

What to watch: the stake, not the ticker

The number that decides who pays is the size of the slice sold, and it is not set ⁵. Micron reports results this week, the next scheduled test of memory pricing ². Seoul keeps the control, New York supplies the cash, and the last buyer in line pays for both.