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Samsung vs SK Hynix: Q3 2026 Memory Duopoly Compared

Compare Samsung Electronics and SK Hynix on Q3 2026 revenue, operating profit, margin, HBM4 progress and memory-sharp expectations in the AI cycle.

One-sentence summary

In Q3 2026, Samsung posted revenue KRW 195.25T and operating profit KRW 107.44T (larger in scale), while SK Hynix posted revenue KRW 104.62T and operating profit KRW 83.33T at an 80% margin; both set records as HBM4 becomes the next main product.

Companies ​

  • Samsung Electronics: Detailed Q3 results on October 29; the DS chip division contributed nearly all group profit.
  • SK Hynix: 3Q26 results on October 28; 80% operating margin, with HBM4 shipments and revenue overtaking HBM3E from Q4.

Key Parameters ​

DimensionSamsung Q3 2026SK Hynix Q3 2026
RevenueKRW 195.25T (+~127% YoY)KRW 104.62T (+32% QoQ, +328% YoY)
Operating profitKRW 107.44T (+~783% YoY)KRW 83.33T (+38% QoQ, +632% YoY)
Operating margin~55%~80%
Net incomeKRW 75.21TKRW 39.78T
HBM progressHBM4 ramped; HBM4E to mass produceHBM4 overtakes HBM3E in shipments/revenue from Q4
Shortage outlookThrough 2028Through 2030
Customer lock-inNot detailed this quarter14 customers; 50%+ of 2027-2028 capacity locked

Key Differences ​

  • Scale vs margin: Samsung is larger in revenue and absolute OP; SK Hynix's 80% margin beats Samsung's 55%.
  • Mix: Samsung concentrates profit in DS with mobile posting a loss; SK Hynix is purer memory earnings.
  • Shortage outlook: Samsung sees it through 2028, SK Hynix through 2030 — the latter more bullish on long-term supply/demand.

Guidance (Investor View) ​

  • Absolute scale and diversification: Samsung.
  • Memory earnings purity and HBM4 share: SK Hynix.
  • Both sit at cycle highs; valuations are highly sensitive to AI capex and price turns.

Sources ​