Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
306 institutional managers reported holding UMC for the quarter ended Mar 31, 2026. Together they hold about 7% of shares outstanding; the top 10 hold 4%. 66 opened new positions; 20 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 27.50M | 1.13% | $247.1M | added +1.9% | 2018 Q3 |
| AQR Capital | 14.71M | 0.60% | $132.2M | added +55.5% | 2024 Q3 |
| Vanguard Group | 12.67M | 0.52% | $113.9M | trimmed -9.1% | ≤2013 |
| Two Sigma | 9.66M | 0.40% | $86.8M | added +70.1% | 2021 Q3 |
| Morgan Stanley | 8.78M | 0.36% | $78.9M | added +14.5% | ≤2013 |
| UBS | 8.23M | 0.34% | $74.0M | added +79.1% | ≤2013 |
| Acadian Asset Management | 8.12M | 0.33% | $73.0M | added +253.6% | ≤2013 |
| Goldman Sachs | 5.87M | 0.24% | $52.8M | added +24.3% | ≤2013 |
| Man Group | 5.73M | 0.23% | $51.5M | added +169.7% | 2024 Q4 |
| Qube Research & Technologies LTD | 5.10M | 0.21% | $45.8M | added +1839% | 2025 Q4 |
| State Street | 5.01M | 0.21% | $45.0M | added +3.8% | ≤2013 |
| Rafferty Asset Management, LLC | 4.98M | 0.20% | $44.8M | trimmed -23.1% | 2021 Q3 |
| Barclays PLC | 4.74M | 0.20% | $42.6M | trimmed -14% | 2021 Q1 |
| Citigroup INC | 4.30M | 0.18% | $38.6M | added +42.8% | 2019 Q4 |
| Northern Trust | 3.20M | 0.13% | $28.7M | trimmed -0.6% | ≤2013 |
| Dimensional Fund Advisors | 2.85M | 0.12% | $25.6M | added +13.2% | ≤2013 |
| BNP Paribas Financial Markets | 2.63M | 0.11% | $23.6M | added +47.5% | ≤2013 |
| Bank OF America CORP /DE/ | 2.60M | 0.11% | $23.4M | trimmed -53.5% | ≤2013 |
| Jane Street | 2.57M | 0.11% | $23.1M | added +459.8% | 2018 Q1 |
| Creative Planning | 2.36M | 0.10% | $21.2M | added +9.5% | 2020 Q4 |
| Pacer Advisors, INC. | 1.96M | 0.08% | $17.6M | added +56.6% | 2025 Q4 |
| D. E. Shaw | 1.89M | 0.08% | $17.0M | added +117.4% | 2024 Q4 |
| Millennium Management | 1.77M | 0.07% | $15.9M | added +154.5% | 2013 Q4 |
| Tidal Investments LLC | 1.60M | 0.07% | $14.3M | added +985.6% | 2023 Q4 |
| Matthews International Capital Management LLC (focused) | 977.6k | 0.04% | $8.8M | opened | 2026 Q1 |
| Moran Wealth Management, LLC | 910.4k | 0.04% | $8.2M | added +14.9% | 2023 Q3 |
| US Bancorp \DE\ | 815.6k | 0.03% | $7.3M | added +40.7% | ≤2013 |
| Citadel Advisors | 765.3k | 0.03% | $6.9M | trimmed -31.9% | 2016 Q1 |
| Capital Fund Management S.a. | 745.3k | 0.03% | $6.7M | added +203.5% | 2025 Q2 |
| Quantinno Capital Management LP | 710.6k | 0.03% | $6.4M | added +17.9% | 2021 Q4 |
| Connor, Clark & Lunn Investment Management LTD. | 710.1k | 0.03% | $6.4M | added +4808.3% | 2025 Q4 |
| LSV Asset Management | 694.2k | 0.03% | $6.2M | unchanged | 2020 Q1 |
| Rhumbline Advisers | 667.6k | 0.03% | $6.0M | trimmed -8.5% | 2023 Q2 |
| B. Metzler seel. Sohn & CO. AG | 653.5k | 0.03% | $5.9M | trimmed -0.8% | 2025 Q4 |
| Vident Advisory, LLC | 635.3k | 0.03% | $5.7M | added +14% | 2022 Q2 |
| Aquatic Capital Management LLC | 604.0k | 0.03% | $5.4M | trimmed -21.3% | 2024 Q3 |
| Susquehanna International Group | 575.7k | 0.02% | $5.2M | added +22.5% | 2020 Q3 |
| Mackenzie Financial CORP | 539.7k | 0.02% | $4.8M | added +114% | 2025 Q1 |
| Eurizon Capital SGR S.p.A. | 524.2k | 0.02% | $4.7M | added +17.4% | 2025 Q4 |
| Quadrant Capital Group LLC | 462.7k | 0.02% | $4.2M | added +40.4% | 2017 Q2 |
| Laird Norton Wetherby Trust Company, LLC | 461.6k | 0.02% | $4.1M | added +1.4% | ≤2013 |
| Ethic INC. | 443.7k | 0.02% | $4.0M | trimmed -10.5% | 2019 Q4 |
| Guggenheim Capital LLC | 432.0k | 0.02% | $3.9M | added +4.8% | ≤2013 |
| O'shaughnessy Asset Management, LLC | 426.6k | 0.02% | $3.8M | added +11.4% | 2019 Q1 |
| Baird Financial Group, INC. | 425.9k | 0.02% | $3.8M | added +4% | 2023 Q4 |
| First Trust Advisors LP | 406.4k | 0.02% | $3.7M | trimmed -6.3% | 2020 Q2 |
| North of South Capital LLP (focused) | 405.1k | 0.02% | $3.6M | added +100.5% | 2025 Q3 |
| Capstone Investment Advisors, LLC | 364.2k | 0.01% | $3.3M | opened | 2026 Q1 |
| Advisors Asset Management, INC. | 363.1k | 0.01% | $3.3M | added +18.5% | 2021 Q1 |
| Robeco Institutional Asset Management B.v. | 311.5k | 0.01% | $2.8M | added +27.3% | 2025 Q4 |
Largest 50 of 306 shown; the full ranked, searchable register is at boothcheck.com/holders/UMC. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.