SK hynix
Memory semiconductors (DRAM, HBM, NAND flash) · South Korea
SK hynix is a South Korean memory-chip maker whose DRAM, and above all its high-bandwidth memory (HBM) stacked beside AI processors, sells mainly to US tech companies building AI data centers.
What makes it different
More than half of all AI memory comes from SK hynix.
56.4%HBM market shareQ1 2026
HBM chips are stacked next to AI processors, so its fortunes now follow AI data-center spending.
How big it is
How big is SK hynix?
₩97.1TRevenueFY2025
₩74.9TDRAM revenueFY2025
47,639Employees2026
How it makes money FY2025
Three-quarters from DRAM, including AI memory.
- DRAM77%₩74.9T
- NAND flash21%₩20.7T
- Other2%₩1.6T
How the business works
Stack memory. Feed AI chips.
- 1DRAM and NAND wafers
- 2DRAM into HBM
- 3To AI chip buyers
HBM is made to order for a few AI chip customers under long-term agreements, which smooths a famously cyclical business.
Who owns it
- Others62.58%
- SK square20.5%
- National Pension Service8.06%
CEO: Kwak Noh-Jung
Who it competes with
Key moments
- 1983Hyundai Electronics enters memory chips
- 2001Restructured and renamed Hynix
- 2012SK Telecom buys control; renamed SK hynix
- 2013World's first HBM launched
- 2021Intel NAND business acquired (Solidigm)
Sources
Every number on this page comes from SK hynix's own reports.
Full profile
The rest of the story is in the app.
What SK hynix tracks27 metrics
HBM market share
DRAM market share including HBM
Full-time employees
Results, quarter by quarterwith a chart
Revenue
Profit
Margin
Where the money comes from5 regions
USA
China
Asia (excl. China)
The full timeline16 moments
2024
2025
2026
SK hynix vs Samsung Electronicsside by side
Revenue
Profit
People
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