HBM Memory: SK hynix, Samsung, Micron — 2026-09-16
DRAM inventory at Samsung and SK hynix has dropped below 10 days as HBM4 production for Nvidia’s Vera Rubin platform consumes capacity at three times the rate of conventional DRAM. Meanwhile, Micron is aggressively scaling its HBM wafer starts to 100,000 per month by year-end to close the gap with Korean rivals, while SK hynix faces a unique strategic dilemma: its high HBM mix is causing its overall DRAM market share to decline despite record revenues.
HBM Memory: SK hynix, Samsung, Micron — 2026-09-16
DRAM Inventory Plummets as HBM4 Squeezes Supply
Samsung and SK hynix have seen their finished DRAM inventory levels fall below 10 days, a critical threshold indicating severe supply tightness. This shortage is driven by the transition to HBM4 for Nvidia’s Vera Rubin AI platform, which consumes approximately three times the wafer capacity of standard DRAM due to lower yields and complex stacking requirements. The scarcity is supporting higher contract prices for conventional memory, as manufacturers prioritize the high-margin HBM lines over legacy products.
Micron Targets 100,000 Monthly HBM Wafer Starts by Year-End
Micron Technology is accelerating its expansion plans, aiming to double its High Bandwidth Memory (HBM) production capacity to approximately 100,000 wafers per month by the end of 2026. This aggressive move, reported by Nikkei Asia and corroborated by industry insiders, involves adding up to 60,000 new wafer starts per month to its existing base. The expansion focuses heavily on 12-layer HBM4 stacks required for next-generation AI accelerators, positioning Micron to compete more effectively with Samsung and SK hynix for Nvidia and AMD supply shares.
SK hynix’s "HBM Paradox": Record Profits but Shrinking DRAM Share
Despite posting record quarterly results driven by AI demand, SK hynix’s overall DRAM market share has declined to approximately 25% from 29% earlier this year. This shift occurs because SK hynix has allocated a disproportionate amount of its production capacity to HBM, leaving less output for conventional DRAM where Samsung and Micron maintain larger volumes. While this strategy maximizes profitability per bit, it reduces the company's dominance in the broader commodity DRAM market, creating a strategic tension between HBM leadership and total market share.
Samsung’s HBM Share Jumps to 33%, Narrowing Gap with Leader
Samsung Electronics has significantly closed the gap with SK hynix in the HBM revenue market, lifting its share to 33% in Q2 2026 from 21% previously. This rapid growth is attributed to improved yields on HBM3E and successful qualification of HBM4 samples for major AI chipmakers. The narrowing gap suggests a more balanced tripartite competition among Samsung, SK hynix, and Micron, potentially leading to more competitive pricing negotiations for customers like Nvidia and AMD in the coming quarters.
Local view
Korean media outlets are closely analyzing the divergence between SK hynix's financial success and its market share metrics. Biz Chosun highlights the "HBM King's Dilemma," noting that while SK hynix maintains its technological lead in HBM, its decision to pivot capacity away from standard DRAM has allowed Samsung to regain ground in total DRAM volume. Money Today reports that the demand for HBM is expanding beyond just Nvidia to include other major tech firms developing custom AI chips, which could further diversify the customer base for both Samsung and SK hynix in the second half of 2026.
Context & numbers
- Inventory Levels: Samsung and SK hynix finished DRAM inventory is <10 days.
- Micron Capacity Target: ~100,000 HBM wafer starts per month by end of 2026 (up from ~50k).
- HBM Market Share: SK hynix holds ~50% share; Samsung has risen to 33% (Q2 2026).
- DRAM Market Share: Samsung leads with 38%; SK hynix trails at 29% (Q1 2026 data).
On the radar
- Nvidia Price Hikes: Reports suggest Nvidia may raise prices for Vera Rubin servers by >15% in early 2027, which could allow HBM suppliers to push for even higher ASPs.
- SK hynix Indiana Fab: Construction milestones for the new US facility are expected, targeting mass production of next-gen HBM by late 2029.
This content was collected, curated, and summarized entirely by AI — including how and what to gather. It may contain inaccuracies. Crew does not guarantee the accuracy of any information presented here. Always verify facts on your own before acting on them. Crew assumes no legal liability for any consequences arising from reliance on this content.
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