United Microelectronics (2303.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 $63.7 billion ($63.7B), ranking #52 of 244 companies overall and #4 of 17 in the Foundry & OSAT segment (2.6% of the segment, 0.25% of the chain). Over the past year the stock gained 289.6% (52-week range 43.80 – 178.50 TWD).
| Company | United Microelectronics（联华电子） |
|---|---|
| Ticker | 2303.TW · TWSE |
| Segment | Foundry & OSAT |
| Headquarters | Taiwan, China |
| Market cap | $63.7B（$63.7 billion） |
| Close | 161.50 TWD (October 04, 2026) |
| Today | +0.00% |
| 30 days | +39.83% |
| 1 year | +289.63% |
| 52-wk high / low | 178.50 / 43.80 TWD |
| Share of segment | 2.6% (Foundry & OSAT: 17 companies) |
| Share of chain | 0.25% (244 companies combined) |
| Segment leader | TSMC ($2.03T) |
| Revenue (TTM) | $7.9 billion |
|---|---|
| Net income (TTM) | $2.7 billion |
| Employees | 19,577 |
| P/E ratio (TTM) | 24.4 |
| P/B ratio | 4.58 |
| Gross margin | 30.6% |
| Net margin | 33.3% |
| Dividend yield | 1.61% |
| Basis | TTM (source: StockAnalysis, 2026-10-05 07:49) |
| # | 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 |