The question came from a legislator in a hearing room in Seoul on October 20, and the answer from the head of the Financial Supervisory Service was careful. Lee Chan-jin told the National Assembly that Solidigm’s proposed listing in the United States could violate South Korea’s rules on duplicate listings, and that his agency was examining whether the overseas subsidiary must file a securities report at home.
Solidigm is not a household name outside the memory industry. It is the company SK Hynix created in 2021 when it agreed to buy Intel’s NAND flash and solid-state drive business for 9 billion dollars, and it is now the vehicle through which the Korean group sells storage chips to American cloud companies. Its headquarters are in San Jose.
Its factory is in Dalian. Its owner is a company listed in Seoul.
The plan under discussion would take it public in the United States as soon as next year, at a valuation that people familiar with the matter have put as high as 150 billion dollars. That figure, if achieved, would make it one of the largest listings of an Asian-controlled technology business in American history, and it would give SK Hynix a currency for acquisitions at a moment when memory is the scarcest input in artificial intelligence computing.
The regulatory objection is not about the listing itself. It is about who pays for it. When a subsidiary issues new shares to outside investors, the proceeds belong to the subsidiary and the ownership of the parent’s shareholders is diluted. In Korea, where conglomerates are structured as pyramids of listed and unlisted affiliates, that dilution has been a live political issue for two decades, and the current government has made it a priority.
The rules were tightened in July. Before a company whose parent is already listed can pursue a listing elsewhere, its board must obtain the consent of minority shareholders. The provision was written for exactly this fact pattern: a cash-rich parent, a fast-growing subsidiary, and an American valuation that is difficult for Korean shareholders to verify and easy for management to prefer.
The gap between the two markets is the reason the plan exists. Memory makers in the United States have been re-rated by investors who expect artificial intelligence to consume an increasing share of global output. Micron trades at a premium to its Korean peers on the same products and the same cycle.
SanDisk, spun out of Western Digital, has been valued on the assumption that NAND pricing has structurally changed. A listing in New York, the argument goes, would let Solidigm be priced against those companies rather than against the Korean discount.
That discount is real and it is not irrational. Korean listed companies trade below their global peers for reasons that include governance, the influence of controlling families, and a history of related-party transactions that minority holders could not block. Each of those reasons is precisely what the new consent requirement is meant to address, and each of them is what a Solidigm offering in Seoul would run into.
The Financial Supervisory Service has several instruments available and has not said which it would use. It can require a domestic filing, which would subject the offering to Korean disclosure and review. It can ask the company to obtain minority consent before proceeding.
It can, in the extreme, refer the matter for enforcement. The agency’s head described the review as a check on whether an obligation exists, which is the language of a regulator keeping its options open.
SK Hynix has said no decision has been made. That is the standard formulation and it is probably accurate: a listing at that valuation requires underwriters, auditors and a market window, and none of those are settled. The company has also not said whether it would seek shareholder approval, which is the question Korean institutional investors have begun to ask publicly.
The timing is awkward in a way that has nothing to do with securities law. Memory prices have been rising for a year, driven by high-bandwidth memory used in accelerators and by the storage demands of training and inference. SK Hynix has said its HBM output for 2027 is sold out, and Samsung has signed long-term agreements covering about 80 percent of its 2027 storage production, according to an estimate published this week by KB Securities. A subsidiary listing at the top of a cycle is a better outcome for the seller than for the buyer.
For the Korean market, the precedent matters more than the transaction. If Solidigm lists in New York without a Seoul filing, every conglomerate with an unlisted subsidiary in a hot sector will consider the same route, and the Seoul exchange will lose the listings that give it exposure to the fastest-growing part of the economy. If the regulator blocks the route, companies will argue that they cannot compete for capital against American peers.
The compromise that has been discussed in Seoul would involve a dual listing or a substantial domestic tranche, with minority consent obtained in advance. That structure satisfies the rules and dilutes the valuation advantage, which is the entire reason for going to New York.
Lee’s testimony was a warning rather than a ruling, and it will be followed by a review that could take months. In that time the company will file documents, the regulator will ask questions, and the shareholders who would be diluted will decide whether to make the argument in public.
The listing may still happen, and it may still be the largest of its kind. What Seoul has made clear this week is that the price of doing it will be negotiated at home first.
