Four Takeaways From Samsung Electronics' 3Q26 Memory Numbers: Reading the 7.3pp Margin Gap With SK Hynix
Following up on my SK Hynix 3Q26 note, I placed Samsung Electronics' 3Q26 DART preliminary disclosures and IR tables on the same K-IFRS frame: consolidated revenue 195.25T KRW, DS operating profit 106.5T KRW (72.4% OPM), a 75.7% mathematical boundary for Samsung Memory OPM vs. SK Hynix's 79.7%, and why the margin gap narrowed from 25.4pp to 5.8pp before widening two straight quarters to 7.3pp.
- Why Scope Matters in Korean Filings: Samsung discloses standalone revenue for Memory (140.8T KRW in 3Q26) but reports operating profit only at the broader DS division level (106.5T KRW on 147.1T KRW revenue = 72.4% OPM), blending Memory with System LSI and Foundry.
- Mathematical Boundary Check: Even if System LSI + Foundry (6.3T KRW combined revenue) earned zero operating profit, Samsung Memory's standalone 3Q26 OPM is mathematically bounded at 75.7% (Calc.)—still below SK Hynix's 79.7% unless non-Memory DS booked an operating loss exceeding ~5.6T KRW.
- Next Filing Checkpoints: November mid-month DART Q3 statutory report (Segment Footnote) and 4Q26 HBM4 mass-production shipment mix.