SK Hynix Readies $14 Billion US Listing as 48GB Memory Stack Wows Nvidia

SK Hynix files for a $14B US ADR listing and unveils HBM4E memory at Computex, cementing its lead as Nvidia's key supplier with 58% HBM market share and a 72% operating margin.

The South Korean chip giant is staging a two-pronged offensive this year, pursuing both a landmark American Depositary Receipt (ADR) listing and unveiling next-generation memory technology that cements its role as Nvidia’s key supplier. SK Hynix has filed a confidential application with the Securities and Exchange Commission for a US listing that could raise up to $14 billion, targeting institutional investors restricted to American-traded securities. The share sale is expected to close before the end of 2026.

The move comes as demand for high-bandwidth memory (HBM) chips used in artificial intelligence data centers remains insatiable. At the Computex trade show in Taipei, SK Hynix demonstrated its latest HBM4E memory modules, each 12-layer stack packing 48 gigabytes — a feat that previously required 16 layers. Bandwidth has surged to 4 terabytes per second. Mass production of these modules is scheduled for 2027, when they are slated for use in Nvidia’s Rubin Ultra graphics processors.

Nvidia’s Vera Rubin platform, which uses the earlier HBM4 generation, has already entered full serial production. First shipments to cloud giants like AWS and Microsoft begin this summer. Industry estimates peg SK Hynix’s share of HBM4 volume at 60–70%, with Samsung capturing roughly a quarter and Micron the remainder. That market dominance was underscored in the first quarter, when SK Hynix controlled 58% of the global high-bandwidth memory market and reported an operating margin of 72% — a historic high.

The company’s production capacity for 2026 is fully sold out, with some customers paying in advance to secure allotments. Janus Henderson fund manager Richard Clode expects disproportionate earnings growth next year as multiyear contracts are renegotiated at significantly higher price levels.

Competition, however, is not standing still. Samsung used the Computex stage to unveil plans for HBM5 memory built on a 2-nanometer process, signaling an aggressive catch-up effort. Meanwhile, a minor incident at SK Hynix’s Cheongju fab — where a fire led to the evacuation of 3,600 workers after toxic gas leaked — did not disrupt core production and was quickly contained.

To expand output ahead of an expected supply crunch in the broader memory market from 2027, SK Hynix is drawing external investment. Air Liquide is pouring nearly €200 million into South Korea to support a new testing and packaging plant in Cheongju, which is set to begin operations by the end of 2027. The facility will help meet rising demand for LPDDR memory used in next-generation AI platforms.

On the Seoul exchange, shares have reflected the strategic momentum. The stock has surged 239% year to date and climbed more than 43% in the past 30 days alone, currently trading at around 2.3 million won. After hitting a record high of roughly 2.4 million won in early June, the shares have pulled back about 3% in a mild consolidation. The relative strength index stands at 76, suggesting the stock is technically overbought in the near term.

Goldman Sachs has lifted its price target on SK Hynix to 3.5 million won and reiterated a buy rating, with analysts forecasting a persistently tight memory supply through 2028. The next major catalyst for the equity is the SEC’s final approval of the US listing, which would open the door to a vast pool of American institutional capital and further underpin the company’s valuation.