June 25, 2026—Micron Technology’s stock soared nearly 16% in after-hours trading, briefly jumping over 18% to $1,236 during the session and pushing its market cap to $1.398 trillion, temporarily overtaking Meta. This surge was triggered by Micron’s earnings report, which far exceeded market expectations: third-quarter revenue reached $41.46 billion, with adjusted earnings per share at $25.11. On the same day, South Korea’s KOSPI index jumped 5.43%, SK Hynix shares surged 13.06% to 2,917,000 KRW, and Samsung Electronics rose 5.29% to 358,500 KRW.
Behind this decisive vote of confidence from the capital markets lies a clear industry signal: HBM (High Bandwidth Memory) is no longer just a DRAM subcategory—it has become a core strategic asset for AI infrastructure. The battle for HBM market share among SK Hynix, Samsung Electronics, and Micron is reshaping the global semiconductor power structure.
Q1 2026 Landscape: SK Hynix Leads, Samsung and Micron Tied for Second
According to data released by Counterpoint Research on June 25, 2026, the global HBM market share by revenue for the first quarter of 2026 was as follows: SK Hynix led with 58%, while Samsung Electronics and Micron each held 21%.
This marks a significant shift from the same period in 2025, when SK Hynix commanded a 69% share. The decline from 69% to 58% wasn’t due to lost orders, but rather the rapid ramp-up of HBM production and shipments by Samsung and Micron, which reduced SK Hynix’s absolute market share. This reflects the market’s transition from a single dominant player to a "three-way standoff."
In the broader DRAM market, Samsung leads with a 38% share, followed by SK Hynix at 29% and Micron at 22%. Notably, China’s ChangXin Memory Technologies (CXMT) has increased its DRAM share from 3% in 2025 to 8%, introducing a new competitive factor in the mid- and low-end segments. However, in the high-end HBM space, the three Korean and American giants still hold an absolute monopoly.
Capacity and Orders: 2026 Sold Out, Seller’s Market Established
The core issue in the HBM market is supply falling far short of demand. All three suppliers’ HBM production for 2026 has already been locked in by customers. SK Hynix’s 2026 HBM capacity is essentially fully booked, and the market has shifted entirely to a seller’s market. In Q1 2026, SK Hynix reported $27.98 billion in revenue, with the highest HBM bit shipment ratio among the three major manufacturers.
For Micron, all HBM supply for 2026 has been sold under fixed-price contracts. Samsung plans to boost its HBM capacity by 50% in 2026, targeting 250,000 wafers per month. By the end of 2025, Samsung’s monthly HBM capacity (170,000 wafers) had already surpassed SK Hynix (160,000 wafers).
A recent TrendForce report from June 23, 2026, notes significant divergence in HBM4 qualification progress among the three suppliers. Samsung leads in HBM4 validation, having resolved heat issues and improved efficiency through process upgrades. SK Hynix, though needing to resample, is expected to maintain the largest shipment share due to its established partnership with NVIDIA. Micron, limited by its technical architecture, is progressing more slowly in validation and faces downward pressure on market share.
NVIDIA’s Supply Chain Strategy: Triple Sourcing and Share Allocation
As the largest single buyer of HBM, NVIDIA’s procurement strategy directly sets the ceiling for each supplier’s market share.
A TrendForce report from February 2026 made it clear: due to ongoing memory supply constraints, NVIDIA will source from all three suppliers to fully meet the massive demand for its Rubin platform. The essence of this strategy is prioritizing supply chain security over the cost efficiency of relying on a single supplier.
For HBM4 supply on the Vera Rubin platform, as of June 5, 2026, SK Hynix holds approximately 60–70% share, Samsung about 25–30%, and Micron supplies the remainder. This allocation roughly matches current market shares, though Samsung’s momentum in HBM4 is becoming increasingly evident.
Projecting the 2027 Landscape: UBS Forecasts and Three Scenarios
Base Case: Samsung Catches Up to SK Hynix, Each at 40%
UBS’s May 2026 research report delivered the most closely watched forecast: by 2027, Samsung is expected to match SK Hynix in HBM bit shipments, with both companies holding about 40% market share and Micron accounting for the remaining 20%.
UBS maintains its 2026 HBM shipment forecast for Samsung at 9.7 billion Gb (up 124% year-over-year), and has sharply raised its 2027 forecast from 20.3 billion Gb to 23 billion Gb (up 137% year-over-year). The main driver for this revision is Samsung’s recent early capital expenditure deployment. TrendForce’s June 23, 2026, report confirms this trend, noting that Samsung’s 2027 HBM shipment target is set to double from 2026.
Scenario 1: Samsung Capitalizes on Validation Edge, Surpasses 40%
If Samsung’s lead in HBM4 qualification translates into large-scale shipments, it could potentially surpass the 40% mark in 2027. Samsung was the first to supply HBM4 to NVIDIA. Counterpoint Research points out that while Samsung currently ranks third in HBM, its early supply of HBM4 to NVIDIA is expected to boost its market share starting in the second half of 2025.
Scenario 2: SK Hynix Maintains Its Stronghold, Stays Above 40%
SK Hynix’s first-mover advantage is not only in market share but also in its deep integration with NVIDIA. SK Hynix is co-developing customized HBM variants with NVIDIA, and this capacity has been permanently shifted away from standard memory markets. In the first half of 2025, about 27% of SK Hynix’s revenue came directly from NVIDIA. This "co-design" relationship means higher customer stickiness and switching costs.
Scenario 3: Micron Breaks Out, Aims to Shatter the 20% Ceiling
Micron is aiming to push its share from the current 21% toward 40%. Its 12-high 36GB HBM3E product is already available. In Q1 2026, Micron’s DRAM revenue grew 81.6% quarter-on-quarter, outpacing SK Hynix’s 62.5%.
However, structural constraints limiting Micron’s share are clear: slower validation progress due to its technical architecture and a lagging position in HBM4 qualification. UBS’s framework sets Micron’s 2027 share at around 20%. Unless Micron can catch up in HBM4 mass production, breaking through the 20% ceiling will be difficult.
Observing the Link Between Crypto Markets and Semiconductor Stocks
As of June 26, 2026, the Bitcoin price fluctuated between $58,000 and $59,900, down more than 52% from its October 2025 all-time high of $126,223. The Ethereum price hovered around $1,510 to $1,557. The total crypto market cap has dropped to about $2.06 trillion.
In stark contrast to the weak crypto market, AI semiconductor stocks continue to attract capital. The semiconductor stock rally triggered by Micron’s June 25 earnings stands in sharp contrast to Bitcoin’s weakness on the same day. According to the Head of Research at CF Benchmarks, a flood of new capital and investor attention has recently shifted to AI stocks, leaving crypto to compete for a shrinking share of overall risk appetite.
This dynamic reveals a deeper trend: investment in AI infrastructure is siphoning liquidity from the crypto market. With HBM capacity sold out and the three major suppliers’ market caps all surpassing $1 trillion, capital is increasingly chasing semiconductor assets with clear orders and revenue visibility, rather than highly volatile crypto assets. For crypto investors, shifts in HBM market share among the big three are not just a semiconductor story—they’re a key indicator of global risk capital flows.
Conclusion
The Q1 2026 HBM market share snapshot—SK Hynix at 58%, Samsung at 21%, and Micron at 21%—is just one moment in this ongoing race. The real determinants of the 2027 landscape will be the interplay of HBM4 qualification progress, capacity expansion pace, and supplier relationships with NVIDIA.
UBS’s "40%-40%-20%" projection offers a baseline, but any deviation from these scenarios could trigger ripple effects across the supply chain and capital markets. For investors, the focus should not be solely on market share numbers, but on the marginal changes in technology validation, capacity expansion, and customer integration—the true variables that will shape the HBM power map in 2027.
FAQ
Q1: What were the exact HBM market shares for the big three in Q1 2026?
According to Counterpoint Research, in Q1 2026, SK Hynix led the HBM market by revenue with 58%, while Samsung Electronics and Micron each held 21%. SK Hynix’s share declined from 69% in Q1 2025, mainly due to increased output from competitors.
Q2: What is UBS’s specific forecast for HBM market share in 2027?
UBS projects that by 2027, Samsung and SK Hynix will each hold about 40% of HBM bit shipments, with Micron at around 20%. UBS raised its 2027 HBM shipment forecast for Samsung to 23 billion Gb, up 137% year-over-year.
Q3: How does HBM4 qualification progress affect the big three’s market shares?
TrendForce’s June 2026 report shows Samsung is leading in HBM4 qualification and is expected to boost its share with early shipments. SK Hynix needs to resample but retains volume advantages. Micron’s slower validation puts its market share under pressure.
Q4: How does NVIDIA allocate orders among the three HBM suppliers?
NVIDIA uses a triple-sourcing strategy to ensure supply chain security. For HBM4 on the Vera Rubin platform, SK Hynix supplies about 60–70%, Samsung 25–30%, and Micron covers the remainder.
Q5: Can Micron break through from 21% to 40% market share?
Micron aims to climb from 21% to 40%, but faces structural challenges due to slower HBM4 qualification. UBS forecasts its 2027 share at around 20%. Whether it can break through depends on how quickly it can ramp up HBM4 mass production.
