Vanguard International Semiconductor (5347.TW, TWSE) is a Taiwan, China company in the Foundry & OSAT segment of the AI compute value chain. As of October 04, 2026, its market cap is $11.0 billion ($11.0B), ranking #137 of 244 companies overall and #12 of 17 in the Foundry & OSAT segment (0.5% of the segment, 0.04% of the chain). Over the past year the stock gained 103.3% (52-week range 88.00 – 220.00 TWD).
| Company | Vanguard International Semiconductor（世界先进） |
|---|---|
| Ticker | 5347.TW · TWSE |
| Segment | Foundry & OSAT |
| Headquarters | Taiwan, China |
| Market cap | $11.0B（$11.0 billion） |
| Close | 187.00 TWD (October 04, 2026) |
| Today | +1.36% |
| 30 days | +23.43% |
| 1 year | +103.26% |
| 52-wk high / low | 220.00 / 88.00 TWD |
| Share of segment | 0.5% (Foundry & OSAT: 17 companies) |
| Share of chain | 0.04% (244 companies combined) |
| Segment leader | TSMC ($2.03T) |
| # | 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 |
| 12 | Vanguard International Semiconductor 5347.TW | TW | $11.0B |
| 10 | King Yuan Electronics 2449.TW | TW | $11.9B |