Samsung and SK hynix, the global leaders in NAND flash memory, are facing a growing challenge in China as domestic manufacturer YMTC rapidly gains market share. According to consultancy Omdia, YMTC captured 38.5% of China's NAND market in the second quarter of 2026, up from about 28% in 2025. This surge has pushed YMTC ahead of both Samsung and SK hynix in their own backyard, forcing the South Korean giants to rethink their China strategy.
YMTC's Meteoric Rise in China's NAND Market
YMTC's growth has been nothing short of remarkable. The company has leveraged strong domestic demand and government support to expand its footprint. In Q2 2026, its market share reached 38.5%, a significant jump from the previous year. This upward trajectory shows no signs of slowing, as YMTC continues to ramp up production and improve its technology.
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The chipmaker primarily produces 160-layer and 232-layer NAND chips, with a small volume of 294-layer chips already in the pipeline. YMTC aims to surpass 300 layers in the medium term, which would put it on par with or ahead of its competitors. Increasing layer count is crucial because it allows more data to be stored in the same space and reduces cost per bit.
Samsung and SK hynix Lose Ground
While YMTC celebrates gains, Samsung and SK hynix are feeling the pinch. In the same quarter, Samsung's share in China dropped to 33.5%, and SK hynix fell to 17%. Together, they now sell fewer NAND chips in China than YMTC does. This is a stark reversal for the Korean companies, which have long dominated the global NAND market.
The decline is partly due to their inability to upgrade their Chinese fabs quickly enough. Their plants in China are reportedly outdated compared to YMTC's latest technology, making it hard to compete on cost and performance. The Korean firms are now planning to modernize these facilities to stem the tide.
Why Modernizing Chinese Fabs Is Critical
China is the world's largest market for semiconductors, and NAND flash is no exception. Losing share in this region not only hurts revenue but also weakens the companies' overall competitive position. Modernizing the fabs would allow Samsung and SK hynix to produce advanced NAND chips locally, reducing costs and improving responsiveness to customer needs. Context on how this played out before sits in Samsung and SK hynix Face China Problem as YMTC Surges.
However, the modernization efforts face hurdles. Export controls and geopolitical tensions may limit access to advanced manufacturing equipment. Moreover, the Korean firms must balance investments in China with their global production strategies. Despite these challenges, sitting idle is not an option—YMTC's momentum is too strong to ignore. The background to this story is set out in Business: latest articles. A related thread runs through US Chip Industry Still Relies Heavily on China Supply Chain.
What This Means for the Global NAND Market
YMTC's rise could reshape the global NAND landscape. If it continues to gain share in China, it may eventually challenge Samsung and SK hynix on the world stage. For now, the Korean companies retain a lead in technology and capacity outside China, but they cannot afford to lose their home-away-from-home market. Earlier coverage in ASML Supplier Sindlhauser Faces China Raw Material Crisis shows how the argument developed. A closer look at the same subject appears in Sanae Takaichi: Japan's First Female PM Defies Odds in Year One.
The competition is likely to intensify, benefiting consumers through lower prices and faster innovation. But for Samsung and SK hynix, the pressure is on to execute their modernization plans swiftly. Anyone following the wider picture can start with Refurbished Samsung Galaxy Z Fold7: Half the Price of New Fold8 Ultra. The same theme surfaces in Caviar Goes Mainstream as China Democratizes Luxury, which takes a different angle.
Key Takeaways
- YMTC's China NAND market share hit 38.5% in Q2 2026, up from 28% in 2025.
- Samsung and SK hynix saw their shares drop to 33.5% and 17%, respectively.
- YMTC produces 160-layer, 232-layer, and limited 294-layer NAND chips, with plans for 300+ layers.
- Samsung and SK hynix plan to modernize their Chinese fabs to compete.
- China's market size makes it crucial for global NAND players.
Market Share Comparison (Q2 2026)
| Company | China NAND Market Share | Change from 2025 |
|---|---|---|
| YMTC | 38.5% | +10.5% |
| Samsung | 33.5% | Down |
| SK hynix | 17% | Down |
FAQ
What is YMTC?
YMTC (Yangtze Memory Technologies) is a Chinese semiconductor manufacturer specializing in NAND flash memory. It has rapidly gained market share in China and is now a major competitor to Samsung and SK hynix.
Why are Samsung and SK hynix losing share in China?
Their Chinese fabs are not as technologically advanced as YMTC's, making it difficult to compete on cost and performance. Additionally, YMTC benefits from strong domestic support and demand.
How do they plan to catch up?
Samsung and SK hynix are planning to modernize their Chinese fabs to produce more advanced NAND chips, aiming to regain competitiveness against YMTC.
What are the implications for the global NAND market?
YMTC's rise could lead to increased competition and innovation, potentially reshaping the global market dynamics and putting pressure on prices.
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