United Microelectronics Corp
UMC- Exchange
- NYSE
- Industry
- Semiconductors & Related Devices
- SEC CIK
- 0001033767
No open-market purchases or sales by United Microelectronics Corp insiders were filed in the last 90 days; 365 institutions reported holding it in 13F filings for Q2 2026, worth $4.90B in total; Maverick Capital is the only superinvestor holding it.
Key figures
- Insider buysOpen market, last 90 days
- 0
- Insider sellsOpen market, last 90 days
- 0
- 13F holdersQ2 2026, +54 vs. previous quarter
- 365
- 13F valueReported value at the end of Q2 2026
- $4.90B
- Superinvestors holdingAt the end of Q2 2026
- 1
Price chart
Superinvestors holding UMC, Q2 2026
1 superinvestor reports holding United Microelectronics Corp on Form 13F. Percentages are the stock's share of each portfolio.
Maverick Capital
Lee Ainslie
<0.1%
United Microelectronics Corp's share of the portfolio
- Shares
- 28,759
- Value
- $782.5K
Latest insider trades
Open-market purchases and sales by United Microelectronics Corp insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Sep 22, 2026 (view filing)6:11 AM ET | Sep 22 | Same day | Lin Jen-TsungVice President | SSaleCommin Shares | −10.0K | $163.00 | −$1.63M | −0.8%1.17M after | Price outlier |
| Sep 17, 2026 (view filing)6:07 AM ET | Sep 16-17 | 1 day | Liu ChitungCFO & SVP | SSale | −1.60M | $143.00 | −$228.8M | −37.7%2.64M after | 2 lotsPrice outlier |
| Jul 13, 2026 (view filing)6:04 AM ET | Jul 13 | Same day | Liu ChitungCFO & SVP | SSale | −1.90M | $154.89 | −$294.3M | −36.4%3.32M after | Price outlier |
| Jun 30, 2026 (view filing) | Jun 30 | Same day | Hu Che-JenVice President | SSale | −10.0K | $171.30 | −$1.71M | −0.3%3.21M after | Price outlier |
Top 10 13F holders, Q2 2026
The largest institutional positions in United Microelectronics Corp at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 31,544,454 | $858.3M | 0.01% | +4,048,574+14.7% | Added |
| UBS Group AG | 11,632,967 | $316.5M | 0.05% | +3,457,823+42.3% | Added |
| Goldman Sachs Group Inc | 11,109,785 | $302.3M | 0.03% | +5,234,921+89.1% | Added |
| Bank of America Corp | 10,181,208 | $277.0M | 0.02% | +7,577,990+291.1% | Added |
| Vanguard Capital Management LLC | 8,601,967 | $234.1M | 0.01% | −386,476−4.3% | Reduced |
| Morgan Stanley | 8,285,573 | $225.5M | 0.01% | −492,330−5.6% | Reduced |
| AQR Capital Management LLC | 7,718,125 | $210.0M | 0.07% | −6,995,905−47.5% | Reduced |
| Rafferty Asset Management, LLC | 7,653,378 | $208.2M | 0.47% | +2,669,725+53.6% | Added |
| Acadian Asset Management LLC | 5,753,245 | $156.5M | 0.19% | −2,370,954−29.2% | Reduced |
| Man Group plc | 5,593,427 | $152.2M | 0.28% | −135,474−2.4% | Reduced |