Longsys (301308, SZSE) is a China company in the Memory / HBM segment of the AI compute value chain. As of October 04, 2026, its market cap is $20.7 billion ($20.7B), ranking #98 of 244 companies overall and #8 of 15 in the Memory / HBM segment (0.5% of the segment, 0.08% of the chain). Over the past year the stock gained 164.3% (52-week range 167.01 – 723.10 CNY).
| Company | Longsys（江波龙） |
|---|---|
| Ticker | 301308 · SZSE |
| Segment | Memory / HBM |
| Headquarters | China |
| Market cap | $20.7B（$20.7 billion） |
| Close | 301.93 CNY (October 04, 2026) |
| Today | -3.12% |
| 30 days | -26.75% |
| 1 year | +164.30% |
| 52-wk high / low | 723.10 / 167.01 CNY |
| Share of segment | 0.5% (Memory / HBM: 15 companies) |
| Share of chain | 0.08% (244 companies combined) |
| Segment leader | Micron Technology ($1.21T) |
| Net income (TTM) | $1.8 billion |
|---|---|
| P/E ratio (TTM) | 11.6 |
| P/B ratio | 6.24 |
| Basis | PE/PB 腾讯行情；净利润=总市值÷PE 推算（TTM） (source: tencent, 2026-10-05 08:05) |
| # | 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 |