UMC
United Microelectronics Corporation · Technology · Semiconductors
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2026 | 1 | +1 | 8.89K | $202,823 | +1 | −1 |
| Q2 2026 | 85 | -1 | 146.16M | $3.97B | +11 | −14 |
| Q1 2026 | 89 | +13 | 142.48M | $1.27B | +18 | −5 |
| Q4 2025 | 75 | +2 | 121.29M | $945.85M | +2 | n/a |
| Q3 2025 | 12 | -1 | 78.28M | $593.39M | +1 | −2 |
| Q2 2025 | 10 | 0 | 46.93M | $360.60M | +1 | −1 |
| Q1 2025 | 7 | -3 | 18.53M | $132.51M | n/a | −3 |
| Q4 2024 | 10 | +3 | 38.45M | $249.57M | +3 | n/a |
| Q3 2024 | 6 | 0 | 23.91M | $201.36M | +1 | −1 |
| Q2 2024 | 6 | n/a | 19.00M | $166.45M | n/a | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Fisher Asset Management ✦ | 7.67M | n/a | $67.17M | 0.0% | n/c | 1 | SEC ↗ |
| 2 | Marshall Wace ✦ | 5.25M | n/a | $45.97M | 0.1% | n/c | 1 | SEC ↗ ×3 |
| 3 | Arrowstreet Capital ✦ | 2.65M | n/a | $23.24M | 0.0% | n/c | 1 | SEC ↗ |
| 4 | Two Sigma Investments ✦ | 1.96M | n/a | $17.13M | 0.0% | n/c | 1 | SEC ↗ |
| 5 | Millennium Management ✦ | 755.03K | n/a | $6.61M | 0.0% | n/c | 1 | SEC ↗ |
| 6 | Citadel Advisors ✦ | 722.02K | n/a | $6.32M | 0.0% | n/c | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 314 holders, 174.09M shares, $1.47B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold: shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Officer · 10.00K sh · $1.63M
Officer · 400.00K sh · $58.00M
Officer · 1.20M sh · $170.80M
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology