SK Hynix Prepares for US Listing as AI Memory Drought Turns Clients Into Co-Funders

SK Hynix stock triples in 2026 as HBM capacity sold out through 2027; customers co-invest in production; $10-14B ADR listing planned.

SK Hynix is on the cusp of a $1 trillion market capitalisation, a threshold only one other South Korean company – Samsung – has crossed in recent weeks. The stock trades at roughly 1.97 million won, having nearly tripled since the start of the year and surged more than 60% in the past 30 days alone. That rally has pushed the shares within a hair’s breadth of a fresh 52-week high, with the distance to the 50-day moving average standing at over 70% – a measure of just how steep the climb has been.

Behind the price action lies a structural shift that analysts say is fundamentally rewiring how the market values high-bandwidth memory (HBM). No longer viewed as a cyclical commodity, premium memory chips have become critical infrastructure for the artificial-intelligence economy – and SK Hynix has run out of room to make them. The company’s HBM capacity for 2026 is already fully spoken for, a fact confirmed by the finance chief last October. Management has signalled that supply will remain tight well into 2027, leaving competitors scrambling for a slice of a market that shows no sign of cooling.

The scarcity is so acute that several major technology companies have stepped in with an unusual offer: they are prepared to finance production lines directly, and even to pay for the purchase of EUV lithography machines from ASML, just to secure priority access to future output. That dynamic – customers turning into co-investors – underscores how deeply the AI industry depends on SK Hynix’s technology. The company began mass-producing its sixth-generation HBM4 in February 2026 at its M16 fab in Icheon and the newly activated M15X plant in Cheongju. The latter is expected to ramp up to 30,000–50,000 wafers a month by the end of 2026, with a medium-term target of 80,000. On top of that, SK Hynix is working with TSMC on the HBM4 design, which promises to double bandwidth and cut power consumption by more than 40%.

The production pipeline extends further. Sample shipments of the next-generation HBM4E are scheduled for the second half of this year, with volume production slated for 2027 – just as demand for AI accelerators is forecast to accelerate further. In parallel, the company is testing Intel’s EMIB 2.5D packaging technology, though suitable materials for mass production are still being evaluated.

All that expansion requires capital, and SK Hynix plans to raise a sizable chunk of it in the US. The company has confidentially filed for an American Depositary Receipt listing targeting the second half of 2026, with proceeds estimated at $10 billion to $14 billion. The funds will be channelled into the semiconductor cluster in Yongin – where construction of the second phase of the first fab is set to begin in August – and a packaging facility in Indiana. The total investment earmarked for the Yongin site alone comes to roughly 31 trillion won (about $20.8 billion), with four fabrication plants planned in the long term alongside an ecosystem of material and equipment suppliers.

The financial arithmetic bolsters the expansion case. SK Hynix’s operating margin is estimated at 72%–75%, buoyed by rising contract prices for DRAM and NAND flash. Brokerages expect DRAM average selling prices to climb further in the current quarter, and the company sees no sign that the pricing cycle for AI memory has peaked – a view that should keep investors upbeat at least through 2027. The combination of sold-out capacity, customer-funded expansion, and a US IPO on the horizon has turned what was once a cyclical memory maker into a structural growth story, and the market is pricing it accordingly.