UMC
United Microelectronics Corporation · Technology · Semiconductors
Momentum inputs (comparable managers): holder breadth 0.0% · share flow -18.9% · net new positions 0.0% · formula
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
| 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 | BlackRock ✦ (passive) | 24.32M | n/a | $186.03M | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 2 | The Vanguard Group ✦ (passive) | 14.83M | n/a | $113.41M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 3 | State Street Global Advisors ✦ (passive) | 4.29M | +8.2% | $34.45M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 4 | AQR Capital Management ✦ | 1.45M | +0.7% | $11.06M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 5 | Citadel Advisors ✦ | 592.88K | -77.2% | $4.54M | 0.0% | ▼ Trim | 5 | SEC ↗ ×2 |
| 6 | D. E. Shaw & Co. ✦ | 477.79K | -30.4% | $3.66M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 7 | Two Sigma Investments ✦ | 378.63K | -70.5% | $2.90M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 8 | Arrowstreet Capital ✦ | 317.27K | New | $2.43M | 0.0% | New | 1 | SEC ↗ |
| 9 | Fidelity (FMR) ✦ | 220.35K | n/a | $1.69M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 10 | Millennium Management ✦ | 58.78K | -99.3% | $449,667 | 0.0% | ▼ Trim | 5 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| Arrowstreet Capital | $2.43M | 0.0% |
Exited
| Marshall Wace | $4.74M | was 0.0% |
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