Samsung vs SK Hynix: HBM Revenue Leadership, October 2026
Samsung closed at 242,000 won on October 27, up 9% on the day. October reports projected the company will surpass SK Hynix in HBM revenue for the first time, with Q4 market share approaching 40%.
Samsung Electronics closed the October 27 session at 242,000 won, a gain of 9% on the day. No coverage reviewed by Slicast explicitly identifies the catalyst for that move, but the session arrived amid a concentrated cluster of October reports that collectively recast Samsung's position in high-bandwidth memory — the component class most directly linked to the current wave of AI infrastructure investment.
The most structurally significant of those reports, cited by Bloomingbit, holds that Samsung is on course to surpass SK Hynix in HBM revenue for the first time, with its fourth-quarter market share approaching 40%. A separate BigGo Finance report placed Samsung's current HBM share at 33% and identified advancing hybrid-bonding technology as a potential differentiator against rivals. The share gains appear to be matched by pricing power: Wccftech, citing industry sources, reported that data-center customers are reportedly willing to pay premiums of up to 25% for what they regard as a superior HBM supply chain. DDR4 memory prices have reportedly surged 24%, with BigGo Finance noting that activity among large technology companies is converging on Samsung's Taylor Fab 2 facility in Texas. Together, these reports describe a moment at which Samsung is extracting both volume share and incremental margin from the AI memory cycle simultaneously.
On the technology and customer front, Samsung appears to be extending its reach across the next generation of AI accelerator platforms. TechPowerUp reported that Samsung's HBM4E passed testing and validation for NVIDIA's forthcoming Rubin Ultra GPU. A separate October report noted that Samsung has agreed to manufacture base die for NVIDIA's NVHBM product on TSMC's 3nm process node — a development described as the first time all three major HBM suppliers have unified on the same foundry platform. TechPowerUp separately reported that SK Hynix faces difficulties with hybrid bonding, which would, if confirmed, extend Samsung's manufacturing window on a technology the company has been developing as a competitive edge. AMD is said to be seeking a broader partnership with Samsung to secure advanced memory supply, and SammyGuru reported that Anthropic's custom AI chips are under consideration for Samsung's 2nm process node — a sign that Samsung's foundry operations are attracting interest from frontier AI developers even as its memory business accelerates. One report noted a Samsung-Broadcom supply agreement, while SK Hynix is separately reported to have secured approximately 70% of the HBM4 allocation on NVIDIA's Vera Rubin platform; those figures, if accurate, suggest the HBM market is large enough to reward multiple strong suppliers simultaneously.
Samsung's financial trajectory adds weight to these operational signals. Mjengo Hub reported that the company posted record profit in its most recent period, attributing the result to AI-infrastructure-driven demand for memory chips. In September 2026, Samsung committed one billion dollars to Helix Digital Infrastructure — the AI data-center vehicle backed by NVIDIA and KKR — as part of what it described as a capital strategy exceeding ten billion dollars in total. Bernstein Research, also in September 2026, maintained a 440,000-won price target on Samsung while trimming its SK Hynix target, explicitly citing expected HBM market-share gains — a relative call that grew more pertinent as October's reporting unfolded. To defend its technology position against talent drain, Samsung is reportedly offering retention bonuses of up to 560,000 dollars per engineer, according to Asia Times, while both Samsung and SK Hynix are reportedly upgrading their China plants to manufacture more advanced chips.
The principal risk sitting against this outlook is China's CXMT. Multiple October reports documented a sector-wide sell-off tied to CXMT's announced plans for a 4F² server DRAM architecture before year-end. Wccftech, citing estimates, claimed this architecture could allow CXMT to leapfrog Samsung by approximately two years in that specific cell architecture — a striking assertion that has not been independently corroborated by other outlets and should be read with corresponding caution. A Futurum analyst, cited by Stocktwits, argued directly that Samsung and SK Hynix's technology lead over CXMT is unlikely to narrow significantly in the near term. A data point from BigGo Finance and Aju Press sharpens the picture: 27 Samsung and SK Hynix veterans who had moved to CXMT departed after an average tenure of 2.9 years, suggesting the company's ability to convert talent acquisition into durable technological capability has been limited. The CXMT trajectory warrants close monitoring, but the current weight of evidence does not support the most extreme readings of the competitive threat.
Three signals will determine how durable the current re-rating proves to be. First, whether Samsung's Q4 HBM revenue actually surpasses SK Hynix's when formal results are published — converting the Bloomingbit projection into audited figures. Second, the commercial terms of the 16-layer HBM4 supply agreements being negotiated among Samsung, SK Hynix, and Micron for NVIDIA's Vera Rubin platform, which will set Samsung's revenue trajectory well into 2027. Third, the pace and performance level at which CXMT actually ships its 4F² DDR5 RDIMM product; the historical gap between announcement and production silicon at Chinese memory firms has been wide, and any material delay would reduce the competitive overhang on Samsung's valuation. Bernstein's 440,000-won target implies roughly 82% upside from the October 27 closing price of 242,000 won; bridging that distance will require Samsung to execute on HBM4 ramp, sustain its foundry customer wins, and demonstrate in reported numbers that CXMT's advance is moving more slowly than its most alarming headlines suggest.