SK Hynix just pulled off the biggest US stock debut by a foreign company, ever
The South Korean memory chip maker raised $26.5 billion on the Nasdaq, riding demand for the chips that make AI work. Here is what that means, and why Washington is already calling.
Key points
- SK Hynix raised $26.5 billion in its US market debut on 10 July 2025, the largest-ever US listing by a non-American company.
- The offering beat Alibaba's $25 billion IPO from 2014, the previous record holder.
- Shares opened 14% above the $149 IPO price on the Nasdaq, where the stock trades under the ticker SKHY from 13 July 2025.
- Demand from investors was reportedly more than seven times the shares available.
- US Commerce Secretary Howard Lutnick publicly urged SK Hynix and Samsung to build chip factories on American soil.
SK Hynix makes a specific type of memory chip called high-bandwidth memory, or HBM. Think of HBM as the short-term storage inside the processors that run AI: without it, systems like ChatGPT could not work at speed. Nvidia, the company that makes the most widely used AI chips in the world, depends on SK Hynix as one of its main HBM suppliers. That single fact explains almost everything that happened on Friday.
The company sold 177.9 million American depositary shares, a financial wrapper that lets US investors buy a slice of a foreign company without trading on its home exchange, at $149 each. By structuring it this way, SK Hynix priced each US share at roughly a tenth of what a full share costs back in Seoul. The deal surpassed Alibaba's $25 billion IPO in 2014, the previous record.
The stock opened 14% above its offering price. It priced at a 2.7% premium to its own Seoul average. Investor demand reportedly ran at more than seven times the shares on offer.
That is striking for a Korean company. Analysts have long talked about the "Korea Discount", a tendency for South Korean firms to trade at lower valuations than comparable companies elsewhere, often blamed on complex ownership structures, low payouts to shareholders, and the ever-present risk of tensions with North Korea. SK Hynix blew past that discount entirely.
The $26.5 billion will go to three things: a new chip factory, or fab, being built in South Korea to ease the global HBM shortage driven by AI demand; a new packaging facility in the same country; and EUV scanners, the specialised machines that use extreme ultraviolet light to etch the finest circuits onto next-generation chips.
What does this mean for people who do not own chip stocks?
Directly, not much yet. But the broader picture matters. AI tools are only as good as the hardware beneath them, and that hardware is tightly concentrated in a small number of facilities in South Korea and Taiwan.
US Commerce Secretary Howard Lutnick made that point bluntly at a Micron event the day before the SK Hynix debut, first reported by TechCrunch AI. He said he is already in talks with both SK Hynix and Samsung, the world's other major memory makers, about building new factories on US soil.
Micron, the only major US-based memory chip company and a direct competitor to SK Hynix, announced plans to invest $250 billion in new American manufacturing, a commitment it says will create more than 90,000 jobs.
The catch: SK Hynix and Samsung together just pledged more than $550 billion for new manufacturing investment inside South Korea. Building the same capacity twice, on two continents, is expensive and slow. Chips take years and billions to move.
