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 $4.89B in total; Maverick Capital is the only superinvestor holding it.
13F holders, Q1 2026
Institutional positions in United Microelectronics Corp as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 319
- +51 vs. Q4 2025
- Shares held
- 176.0M
- +37.2M (+26.8%) vs. Q4 2025
- Total value
- $1.57B
- +$484.9M (+44.7%) vs. Q4 2025
- New holders
- 73
- 145 more added
- Sold out
- 22
- 55 more reduced
3 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting UMC on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 365 | $4.89B |
| Q1 2026 | 319 | $1.57B |
| Q4 2025 | 271 | $1.19B |
| Q3 2025 | 240 | $1.00B |
| Q2 2025 | 239 | $1.16B |
| Q1 2025 | 234 | $1.11B |
| Q4 2024 | 253 | $1.04B |
| Q3 2024 | 268 | $1.35B |
| Q2 2024 | 238 | $1.16B |
| Q1 2024 | 242 | $1.07B |
| Q4 2023 | 250 | $1.03B |
| Q3 2023 | 217 | $912.6M |
| Q2 2023 | 220 | $1.00B |
| Q1 2023 | 221 | $1.15B |
| Q4 2022 | 223 | $873.8M |
| Q3 2022 | 226 | $744.5M |
| Q2 2022 | 225 | $857.0M |
| Q1 2022 | 241 | $1.17B |
| Q4 2021 | 264 | $1.32B |
| Q3 2021 | 230 | $1.35B |
| Q2 2021 | 203 | $846.6M |
| Q1 2021 | 205 | $818.6M |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding United Microelectronics Corp; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Jane Street Group, LLC | 2,570,219 | $23.1M | 0.02% | +2,111,066+459.8% | Added |
| Bank of America Corp | 2,603,218 | $23.4M | 0.00% | −3,000,472−53.5% | Reduced |
| Vanguard Portfolio Management LLC | 2,763,082 | $24.8M | 0.00% | +2,763,082 | New |
| Dimensional Fund Advisors LP | 2,849,737 | $25.6M | 0.01% | +333,011+13.2% | Added |
| Northern Trust Corp | 3,198,874 | $28.7M | 0.00% | −19,009−0.6% | Reduced |
| Citigroup Inc | 4,296,722 | $38.6M | 0.02% | +1,288,362+42.8% | Added |
| Barclays PLC | 4,738,867 | $42.6M | 0.02% | −772,917−14.0% | Reduced |
| Rafferty Asset Management, LLC | 4,983,653 | $44.8M | 0.18% | −1,494,177−23.1% | Reduced |
| State Street Corp | 5,013,209 | $45.0M | 0.00% | +185,119+3.8% | Added |
| Qube Research & Technologies Ltd | 5,101,879 | $45.8M | 0.07% | +4,838,763+1,839.0% | Added |
| Man Group plc | 5,728,901 | $51.4M | 0.11% | +3,604,924+169.7% | Added |
| Goldman Sachs Group Inc | 5,874,864 | $52.8M | 0.01% | +1,148,958+24.3% | Added |
| Acadian Asset Management LLC | 8,124,199 | $72.9M | 0.10% | +5,826,613+253.6% | Added |
| UBS Group AG | 8,175,144 | $73.4M | 0.01% | +3,604,697+78.9% | Added |
| Morgan Stanley | 8,777,903 | $78.8M | 0.00% | +1,109,073+14.5% | Added |
| Vanguard Capital Management LLC | 8,988,443 | $80.7M | 0.00% | +8,988,443 | New |
| Two Sigma Investments, LP | 9,655,402 | $86.7M | 0.07% | +3,980,009+70.1% | Added |
| AQR Capital Management LLC | 14,714,030 | $132.1M | 0.06% | +5,249,718+55.5% | Added |
| BlackRock, Inc. | 27,495,880 | $246.9M | 0.00% | +512,365+1.9% | Added |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −3,449,200−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −1,980,820−100.0% | Sold out |
| Kadensa Capital Ltd | 0 | $0 | 0.00% | −1,335,392−100.0% | Sold out |
| Mirae Asset Global Investments Co., Ltd. | 0 | $0 | 0.00% | −168,648−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −94,282−100.0% | Sold out |
| GTS Securities LLC | 0 | $0 | 0.00% | −64,661−100.0% | Sold out |
| Bridgefront Capital, LLC | 0 | $0 | 0.00% | −54,434−100.0% | Sold out |
| R Squared Ltd | 0 | $0 | 0.00% | −27,926−100.0% | Sold out |
| Flow Traders U.S. LLC | 0 | $0 | 0.00% | −18,508−100.0% | Sold out |
| Henry James International Management, Inc. | 0 | $0 | 0.00% | −13,747−100.0% | Sold out |
| Tuttle Tactical Management | 0 | $0 | 0.00% | −13,663−100.0% | Sold out |
| Lido Advisors, LLC | 0 | $0 | 0.00% | −12,985−100.0% | Sold out |
| Scientech Research LLC | 0 | $0 | 0.00% | −12,745−100.0% | Sold out |
| Wealthspire Advisors, LLC | 0 | $0 | 0.00% | −10,006−100.0% | Sold out |
| Bank Julius Baer & Co. Ltd, Zurich | 0 | $0 | 0.00% | −8,107−100.0% | Sold out |
| Kestra Advisory Services, LLC | 0 | $0 | 0.00% | −6,679−100.0% | Sold out |
| Parallax Volatility Advisers, L.P. | 0 | $0 | 0.00% | −2,550−100.0% | Sold out |
| SageView Advisory Group, LLC | 0 | $0 | 0.00% | −2,471−100.0% | Sold out |
| Prestige Wealth Management Group LLC | 0 | $0 | 0.00% | −661−100.0% | Sold out |
| Clear Street Markets LLC | 0 | $0 | 0.00% | −363−100.0% | Sold out |
| Safe Harbor Fiduciary, LLC | 0 | $0 | 0.00% | −300−100.0% | Sold out |
| Bayban | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| Global Retirement Partners, LLC | – | – | – | – | Not filed |
| CIBC Private Wealth Group, LLC | – | – | – | – | Not filed |