United Microelectronics Corporation (UMC) Major Shareholders
United Microelectronics shareholders at a glance
The largest holder of United Microelectronics stock is Hsieh Yung Investment Co. Ltd., with 441.4 million shares (3.51% of the company), worth about $1.80 billion as of September 25, 2026. The 10 largest holders together own 8.6%.
In Q2 2026, 395 institutional holdings reports listed 180.0 million shares worth $4.90 billion, up 3.4% in shares from Q1 2026.
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026).
United Microelectronics Corporation
Shareholders Summary
2026Q2
Ownership by Type
Geographic Distribution
Largest United Microelectronics shareholders
| Holder | Shares | % of company | Value |
|---|---|---|---|
| Hsieh Yung Investment Co. Ltd. | 441.4 million | 3.51% | $1.8B |
| Silicon Integrated Systems Corp. | 266.6 million | 2.12% | $1.1B |
| Yuanta Securities Investment Trust Co., Ltd. | 103.1 million | 0.82% | $419.0M |
| Uni-President Asset Management Corp. | 79.4 million | 0.63% | $323.0M |
| Stan Hung0.4751 % | 59.7 million | 0.48% | $243.0M |
| Shi Wang0.2318 % | 29.1 million | 0.23% | $119.0M |
| Fuh Hwa Securities Investment Trust Co., Ltd. | 27.8 million | 0.22% | $113.0M |
| Sjunde Ap Fonden (Investment Management) | 27.0 million | 0.21% | $110.0M |
| Cathay Securities Investment Trust Co., Ltd. | 25.3 million | 0.20% | $103.0M |
| State Street Global Advisors Ltd. | 21.9 million | 0.17% | $89.0M |
As of September 25, 2026.
United Microelectronics institutional holdings by quarter
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 395 | 180.0 million | $4.9B |
| Q1 2026 | 336 | 174.0 million | $1.6B |
| Q4 2025 | 288 | 151.0 million | $1.2B |
| Q3 2025 | 256 | 133.0 million | $1.0B |
| Q2 2025 | 253 | 152.0 million | $1.2B |
| Q1 2025 | 254 | 155.0 million | $1.1B |
| Q4 2024 | 265 | 160.0 million | $1.0B |
| Q3 2024 | 287 | 161.0 million | $1.4B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
Questions and answers
Who owns the most United Microelectronics stock?
Hsieh Yung Investment Co. Ltd., with 3.51% of the company (as of September 25, 2026). Next: Silicon Integrated Systems Corp. (2.12%) and Yuanta Securities Investment Trust Co., Ltd. (0.82%).
How many institutions own United Microelectronics stock?
395 institutional holdings reports listed United Microelectronics shares in Q2 2026, 180.0 million shares in all worth $4.90 billion.
