Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
319 institutional managers reported holding UCTT for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 51%. 109 opened new positions; 25 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 6.83M | 15.08% | $424.6M | added +1.7% | ≤2013 |
| Vanguard Group | 5.08M | 11.21% | $315.7M | added +1.8% | ≤2013 |
| State Street | 1.84M | 4.06% | $114.2M | trimmed -0.8% | ≤2013 |
| Frontier Capital Management CO LLC | 1.79M | 3.95% | $111.1M | trimmed -49.1% | 2022 Q4 |
| Invesco | 1.66M | 3.66% | $103.2M | trimmed -51.2% | ≤2013 |
| Boston Partners | 1.47M | 3.24% | $91.3M | opened | 2026 Q1 |
| D. E. Shaw | 1.18M | 2.61% | $73.5M | added +24.3% | 2024 Q3 |
| Geode Capital | 1.14M | 2.52% | $70.9M | added +4.7% | ≤2013 |
| Driehaus Capital Management LLC | 1.06M | 2.35% | $66.0M | added +134.2% | 2025 Q3 |
| Dimensional Fund Advisors | 1.01M | 2.23% | $62.9M | trimmed -33.6% | ≤2013 |
| Morgan Stanley | 911.7k | 2.01% | $56.7M | added +1.9% | ≤2013 |
| Charles Schwab Investment Management | 840.5k | 1.85% | $52.2M | added +2.4% | ≤2013 |
| Royce & Associates | 759.5k | 1.68% | $47.2M | trimmed -30.9% | ≤2013 |
| Millennium Management | 685.4k | 1.51% | $42.6M | added +22.4% | 2021 Q2 |
| Oberweis Asset Management INC/ | 640.5k | 1.41% | $39.8M | added +1.9% | 2019 Q4 |
| Paradigm Capital Management INC/NY | 608.2k | 1.34% | $37.8M | unchanged | 2014 Q2 |
| Cooper Creek Partners Management LLC | 586.8k | 1.29% | $36.5M | opened | 2026 Q1 |
| Two Sigma | 581.1k | 1.28% | $36.1M | opened | 2026 Q1 |
| SG Americas Securities, LLC | 565.6k | 1.25% | $35.2M | added +348.7% | 2023 Q1 |
| Goldman Sachs | 503.3k | 1.11% | $31.3M | trimmed -9.8% | ≤2013 |
| Fuller & Thaler Asset Management, INC. | 475.1k | 1.05% | $29.5M | added +3417.8% | 2025 Q1 |
| Northern Trust | 458.1k | 1.01% | $28.5M | trimmed -1.1% | ≤2013 |
| UBS | 455.9k | 1.01% | $28.3M | added +41.6% | 2015 Q4 |
| Bank OF America CORP /DE/ | 454.0k | 1.00% | $28.2M | added +502.4% | ≤2013 |
| BNY Mellon | 443.7k | 0.98% | $27.6M | trimmed -30.1% | ≤2013 |
| Pinnacle Associates LTD | 441.7k | 0.97% | $27.4M | trimmed -4.4% | 2018 Q1 |
| First Eagle Investment Management | 434.1k | 0.96% | $27.0M | added +5.7% | 2021 Q2 |
| Divisar Capital Management LLC (focused) | 420.0k | 0.93% | $26.1M | trimmed -55.8% | 2018 Q3 |
| Nomura Asset Management International INC. | 412.7k | 0.91% | $25.6M | opened | 2026 Q1 |
| Russell Investments Group, LTD. | 359.9k | 0.80% | $22.4M | added +456.5% | 2023 Q1 |
| ION Fund Management LTD | 349.9k | 0.77% | $21.7M | opened | 2026 Q1 |
| BNP Paribas Financial Markets | 324.6k | 0.72% | $20.2M | trimmed -24% | 2014 Q3 |
| Goodman Financial CORP | 311.1k | 0.69% | $19.3M | trimmed -44.2% | 2024 Q4 |
| Jane Street | 309.7k | 0.68% | $19.2M | added +205% | 2020 Q4 |
| Next Century Growth Investors LLC | 280.5k | 0.62% | $17.4M | opened | 2026 Q1 |
| Public Sector Pension Investment Board | 277.4k | 0.61% | $17.2M | added +76.5% | 2018 Q1 |
| MetLife Investment Management, LLC | 267.9k | 0.59% | $16.6M | added +922.4% | 2017 Q4 |
| Marshall Wace | 259.9k | 0.57% | $16.1M | added +129% | 2024 Q3 |
| Ameriprise Financial INC | 252.4k | 0.56% | $15.7M | trimmed -5% | 2017 Q1 |
| Dana Investment Advisors, INC. | 249.4k | 0.55% | $15.5M | trimmed -36% | 2024 Q1 |
| Loomis Sayles & CO L P | 231.1k | 0.51% | $14.4M | opened | 2026 Q1 |
| Citigroup INC | 227.5k | 0.50% | $14.1M | added +229.9% | ≤2013 |
| Prudential Financial INC | 221.5k | 0.49% | $13.8M | added +193.3% | ≤2013 |
| Principal Financial Group INC | 220.7k | 0.49% | $13.7M | added +2% | 2017 Q2 |
| G2 Investment Partners Management LLC | 180.9k | 0.40% | $11.2M | opened | 2026 Q1 |
| AQR Capital | 178.8k | 0.40% | $11.1M | trimmed -18.2% | 2019 Q4 |
| Federated Hermes, INC. | 172.1k | 0.38% | $10.7M | opened | 2026 Q1 |
| Wells Fargo & COMPANY/MN | 171.6k | 0.38% | $10.7M | added +110.8% | 2014 Q1 |
| SG Capital Management LLC | 165.2k | 0.36% | $10.3M | opened | 2026 Q1 |
| Redwood Grove Capital, LLC (focused) | 162.4k | 0.36% | $10.1M | opened | 2026 Q1 |
Largest 50 of 319 shown; the full ranked, searchable register is at boothcheck.com/holders/UCTT. 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.