SK hynix raises $26.5bn in giant AI-driven US listing

TL;DR:

  • South Korean chipmaker SK hynix priced a US listing to raise $26.5bn (about £20bn), one of the largest stock sales ever, on surging AI memory demand.
  • The Nasdaq offering was more than seven times oversubscribed despite recent jitters over stretched AI valuations.
  • SK hynix, Samsung and Micron dominate the high-bandwidth memory market that AI servers depend on.

SK hynix, a key supplier of advanced memory chips to Nvidia, has priced a mammoth US listing aiming to raise $26.5bn (about £20bn) — among the biggest ever — as it capitalises on the AI datacentre boom. The company will trade on Nasdaq via American depositary shares, having seen its Seoul-listed stock climb more than 220% this year.

Memory becomes the bottleneck

Demand was strong even as tech stocks wobble over fears that AI spending is running ahead of returns: the offering was more than seven times oversubscribed. The raise beats Saudi Aramco’s 2019 debut and Alibaba’s New York float, though it falls short of SpaceX’s record $75bn IPO last month. SK hynix, Samsung and Micron together control the market for high-bandwidth memory (HBM), the specialised components that sit alongside GPUs in AI servers — and all three have passed $1tn valuations, joining a club that until recently was almost entirely American.

There is a consumer sting. As chipmakers pour capacity into lucrative HBM, shortages of ordinary memory are pushing up prices across electronics, with Apple already raising MacBook and iPad costs — the “chipflation” now worrying macroeconomists. It is the same infrastructure squeeze driving hyperscalers to design their own silicon, from DeepSeek’s in-house chip to Meta’s custom accelerators, and it feeds warnings that half the world’s mega-datacentre projects could stall.

Looking forward

SK hynix will use the proceeds to fund new fabrication and packaging plants in South Korea. For UK observers, the listing is a clean gauge of just how much capital the AI build-out is pulling in — and how concentrated the supply chain has become around a handful of memory makers. If demand holds, the memory squeeze raising the price of everyday devices looks unlikely to ease soon.

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