Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
355 institutional managers reported holding VICR for the quarter ended Mar 31, 2026. Together they hold about 40% of shares outstanding; the top 10 hold 24%. 100 opened new positions; 32 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 2.88M | 6.10% | $463.8M | trimmed -19.3% | ≤2013 |
| Vanguard Group | 2.39M | 5.06% | $384.4M | trimmed -5.7% | ≤2013 |
| T. Rowe Price | 1.89M | 4.00% | $303.7M | added +329.4% | ≤2013 |
| State Street | 811.6k | 1.72% | $130.5M | trimmed -3% | ≤2013 |
| Manufacturers Life Insurance Company, THE | 603.4k | 1.28% | $97.0M | added +39.6% | ≤2013 |
| Geode Capital | 602.7k | 1.27% | $96.9M | added +7.1% | ≤2013 |
| Arrowstreet Capital | 536.3k | 1.14% | $86.2M | added +43.4% | 2024 Q4 |
| Needham Investment Management LLC | 522.0k | 1.10% | $83.9M | trimmed -8.4% | 2014 Q4 |
| Dimensional Fund Advisors | 493.7k | 1.04% | $79.4M | trimmed -11.3% | ≤2013 |
| Goldman Sachs | 389.8k | 0.82% | $62.7M | added +165.2% | 2016 Q3 |
| Jane Street | 327.7k | 0.69% | $52.7M | opened | 2023 Q1 |
| Morgan Stanley | 306.9k | 0.65% | $49.4M | trimmed -14.3% | ≤2013 |
| AWM Investment Company, INC. | 288.2k | 0.61% | $46.3M | trimmed -13.5% | 2020 Q2 |
| Northern Trust | 272.7k | 0.58% | $43.9M | added +21.7% | ≤2013 |
| Millennium Management | 221.9k | 0.47% | $35.7M | added +6857.3% | 2022 Q4 |
| Herald Investment Management LTD | 220.0k | 0.47% | $35.4M | trimmed -10.2% | 2020 Q1 |
| Colrain Capital LLC (focused) | 201.6k | 0.43% | $32.4M | trimmed -10.9% | 2024 Q4 |
| Charles Schwab Investment Management | 194.5k | 0.41% | $31.3M | trimmed -12.2% | ≤2013 |
| Driehaus Capital Management LLC | 189.5k | 0.40% | $30.5M | opened | 2026 Q1 |
| FMR (Fidelity) | 165.3k | 0.35% | $26.6M | trimmed -21.8% | 2020 Q1 |
| First Trust Advisors LP | 164.0k | 0.35% | $26.4M | added +23.5% | 2018 Q3 |
| Arosa Capital Management LP (focused) | 156.5k | 0.33% | $25.2M | added +15.9% | 2025 Q4 |
| Pinnacle Associates LTD | 156.0k | 0.33% | $25.1M | trimmed -37.6% | 2023 Q2 |
| AQR Capital | 148.3k | 0.31% | $23.8M | added +81.7% | 2018 Q2 |
| BNY Mellon | 140.3k | 0.30% | $22.6M | added +4.9% | ≤2013 |
| Tudor Investment | 137.3k | 0.29% | $22.1M | added +154.2% | 2025 Q4 |
| UBS | 131.8k | 0.28% | $21.2M | added +39.5% | ≤2013 |
| Invesco | 126.5k | 0.27% | $20.3M | trimmed -14.9% | 2017 Q1 |
| Silvercrest Asset Management Group LLC | 115.4k | 0.24% | $18.6M | opened | 2026 Q1 |
| GF Fund Management CO. LTD. | 115.2k | 0.24% | $18.5M | opened | 2026 Q1 |
| Ashford Capital Management INC | 113.5k | 0.24% | $18.3M | trimmed -67.9% | 2013 Q3 |
| Nuveen | 110.7k | 0.23% | $17.8M | trimmed -52.7% | 2019 Q2 |
| Principal Financial Group INC | 110.2k | 0.23% | $17.7M | added +1.4% | ≤2013 |
| Jacobs Levy Equity Management, INC | 102.5k | 0.22% | $16.5M | added +81.5% | 2024 Q4 |
| Bank OF America CORP /DE/ | 102.1k | 0.22% | $16.4M | added +44.4% | ≤2013 |
| AllianceBernstein | 101.2k | 0.21% | $16.3M | added +292.2% | ≤2013 |
| Qube Research & Technologies LTD | 89.6k | 0.19% | $14.4M | added +254.2% | 2025 Q1 |
| Acadian Asset Management | 85.3k | 0.18% | $13.7M | added +37.4% | 2020 Q2 |
| HRT Financial LP | 83.9k | 0.18% | $13.5M | opened | 2026 Q1 |
| BNP Paribas Financial Markets | 75.4k | 0.16% | $12.1M | added +840.8% | 2014 Q2 |
| EverSource Wealth Advisors, LLC | 75.0k | 0.16% | $12.1M | added +20613% | 2024 Q2 |
| Cibc World Market INC. | 73.1k | 0.15% | $11.8M | added +1990.4% | 2025 Q4 |
| Ariose Capital Management LTD (focused) | 72.8k | 0.15% | $11.7M | opened | 2026 Q1 |
| Rhumbline Advisers | 67.8k | 0.14% | $10.9M | added +9.5% | ≤2013 |
| Bruce & CO., INC. (focused) | 65.0k | 0.14% | $10.5M | trimmed -27.8% | 2023 Q3 |
| Susquehanna International Group | 60.1k | 0.13% | $9.7M | added +69.4% | 2016 Q2 |
| Raymond James Financial INC | 56.5k | 0.12% | $9.1M | trimmed -13.1% | 2024 Q2 |
| Andar Capital Management HK LTD (focused) | 55.0k | 0.12% | $8.8M | added +71.9% | 2025 Q4 |
| Empowered Funds, LLC | 51.1k | 0.11% | $8.2M | added +6794.9% | 2025 Q4 |
| Ameriprise Financial INC | 50.7k | 0.11% | $8.2M | trimmed -46.5% | ≤2013 |
Largest 50 of 355 shown; the full ranked, searchable register is at boothcheck.com/holders/VICR. 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.