SK hynix

South Korean memory maker that analysts expect to supply about half of the newest HBM used in AI chips.

Says HBM and other DRAM are sold out through 2029. More than half of 2027 and 2028 capacity is covered by long-term agreements (company, Oct 2026).

https://www.skhynix.com

What it is

SK hynix makes DRAM and NAND flash memory. Its key AI product is high-bandwidth memory. These are stacks of DRAM chips placed right beside a GPU to feed it data. HBM4 shipments began in earnest in the third quarter of 2026. The company expects HBM4 to become its main HBM product from the fourth quarter.

Why it matters for AI

AI chips spend much of their time waiting for data. HBM is how that wait is cut. Industry sources said in January 2026 that SK hynix holds about two-thirds of Nvidia’s HBM4 volume for Vera Rubin. Its results show the pricing power that brings. Operating margin reached 80% in the third quarter of 2026.

Founders and CEO: Founded in 1983 as Hyundai Electronics. Part of SK Group since 2012. CEO Kwak Noh-jung
Founded: 1983
Headquarters: Icheon, South Korea
Role in AI: Memory: HBM
How it earns: Sells memory chips to GPU makers, cloud providers and device makers, more and more under multi-year supply agreements.

Revenue

Jun 2026: ₩79.3T (quarterly revenue (Q2 2026) with ₩60.5T operating profit · company-reported, preliminary) · SK hynix release via Placera
Sep 2026: ₩104.6T (quarterly revenue (Q3 2026), first quarter above ₩100T · company-reported) · SK hynix release via Placera
Sep 2026: ₩83.3T (operating profit (Q3 2026), 80% margin and up 632% year on year · company-reported) · The Korea Times

Deals and milestones

Jan 2026: P&T7 advanced packaging plant for HBM in Cheongju, ₩19 trillion (about $12.9B) · completion targeted for end-2027 · BTW Media
Jan 2026: First Yongin fab pulled forward to Feb 2027 · M15X HBM fab starts wafer loading, Part of a planned ₩600 trillion Yongin cluster · Reuters via The Star
Jun 2026: Multiyear technology partnership with Nvidia, Co-developing memory for Vera Rubin · terms not disclosed · Evertiq
Oct 2026: Shareholder return plan for FY2026, About ₩100 trillion in dividends and buybacks · SK hynix release via Placera

Latest news

2026-10-28: Record Q3 revenue of ₩104.6T and an 80% operating margin. HBM4 to overtake HBM3E in Q4 · The Korea Times
2026-07-28: Q2 revenue of ₩79.3T and operating profit of ₩60.5T · SK hynix release via Placera
2026-06-18: SK hynix ships 12-layer HBM4E samples to major customers · Reuters via The Star
2026-06-08: Multiyear memory technology partnership signed with Nvidia · Evertiq
2026-01-28: Industry sources say SK hynix has won about two-thirds of Nvidia’s HBM4 orders · Korea JoongAng Daily
2026-01-15: SK hynix speeds up its first Yongin fab by three months to meet memory demand · Reuters via The Star