SK Hynix (000660.KS, KRX) is a South Korea company in the Memory / HBM segment of the AI compute value chain — Korean HBM and DRAM memory maker supplying AI accelerators. As of October 04, 2026, its market cap is $998.6 billion ($998.6B), ranking #7 of 244 companies overall and #3 of 15 in the Memory / HBM segment (24.1% of the segment, 3.94% of the chain). Over the past year the stock gained 421.8% (52-week range 395,500.00 – 2,919,000.00 KRW).
| Company | SK Hynix（SK海力士） |
|---|---|
| Ticker | 000660.KS · KRX |
| Segment | Memory / HBM |
| Headquarters | South Korea |
| Market cap | $998.6B（$998.6 billion） |
| Close | 1,833,000.00 KRW (October 04, 2026) |
| Today | +0.77% |
| 30 days | +22.80% |
| 1 year | +421.81% |
| 52-wk high / low | 2,919,000.00 / 395,500.00 KRW |
| Share of segment | 24.1% (Memory / HBM: 15 companies) |
| Share of chain | 3.94% (244 companies combined) |
| Segment leader | Micron Technology ($1.21T) |
| Revenue (TTM) | $140.8 billion |
|---|---|
| Net income (TTM) | $118.2 billion |
| Employees | 36,042 |
| P/E ratio (TTM) | 8.1 |
| P/B ratio | 5.11 |
| Gross margin | 76.3% |
| Net margin | 85.6% |
| Dividend yield | 0.16% |
| Basis | TTM (source: StockAnalysis, 2026-10-05 07:49) |
| # | Company | Market | Market cap |
|---|---|---|---|
| 1 | Micron Technology MU | US | $1.21T |
| 2 | Samsung Electronics 005930.KS | KR | $1.20T |
| 3 | SK Hynix 000660.KS | KR | $998.6B |
| 4 | SanDisk SNDK | US | $251.8B |
| 5 | Kioxia Holdings 285A.T | JP | $201.3B |
| 6 | Western Digital WDC | US | $149.7B |
| 7 | GigaDevice 603986 | SH | $37.1B |
| 8 | Longsys 301308 | SZ | $20.7B |
| 9 | Hanmi Semiconductor 042700.KS | KR | $19.2B |
| 10 | Biwin Storage Technology 688525 | SH | $13.7B |