JCET Group (600584, SSE) is a China company in the Foundry & OSAT segment of the AI compute value chain — China's largest OSAT packaging and test house (JCET). As of October 04, 2026, its market cap is $17.1 billion ($17.1B), ranking #110 of 244 companies overall and #7 of 17 in the Foundry & OSAT segment (0.7% of the segment, 0.07% of the chain). Over the past year the stock gained 66.9% (52-week range 34.70 – 106.59 CNY).
| Company | JCET Group（长电科技） |
|---|---|
| Ticker | 600584 · SSE |
| Segment | Foundry & OSAT |
| Headquarters | China |
| Market cap | $17.1B（$17.1 billion） |
| Close | 64.28 CNY (October 04, 2026) |
| Today | -2.16% |
| 30 days | -24.70% |
| 1 year | +66.87% |
| 52-wk high / low | 106.59 / 34.70 CNY |
| Share of segment | 0.7% (Foundry & OSAT: 17 companies) |
| Share of chain | 0.07% (244 companies combined) |
| Segment leader | TSMC ($2.03T) |
| Net income (TTM) | $288.8 million |
|---|---|
| P/E ratio (TTM) | 59.3 |
| P/B ratio | 3.99 |
| 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 | TSMC 2330.TW | TW | $2.03T |
| 2 | ASE Technology 3711.TW | TW | $100.0B |
| 3 | SMIC 0981.HK | HK | $65.7B |
| 4 | United Microelectronics 2303.TW | TW | $63.7B |
| 5 | GlobalFoundries GFS | US | $28.0B |
| 6 | Hua Hong Semiconductor 1347.HK | HK | $25.9B |
| 7 | JCET Group 600584 | SH | $17.1B |
| 8 | Amkor Technology AMKR | US | $13.9B |
| 9 | Tongfu Microelectronics 002156 | SZ | $13.5B |
| 10 | King Yuan Electronics 2449.TW | TW | $11.9B |