VICR
Vicor Corporation · Technology · Hardware, Equipment & Parts
Momentum inputs (comparable managers):
holder breadth +10.0% ·
share flow -15.2% ·
net new positions +9.1%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q4 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 128 | +13 | 16.24M | $6.11B | +22 | −9 |
| Q1 2026 | 118 | +18 | 15.68M | $2.48B | +19 | −1 |
| Q4 2025 | 99 | +1 | 16.79M | $1.84B | +2 | −1 |
| Q3 2025 | 18 | +3 | 17.37M | $863.84M | +3 | −1 |
| Q2 2025 | 13 | 0 | 8.08M | $366.47M | — | — |
| Q1 2025 | 10 | -1 | 1.91M | $89.36M | — | −1 |
| Q4 2024 | 11 | +1 | 1.82M | $88.05M | +1 | — |
| Q3 2024 | 9 | -1 | 1.26M | $53.12M | — | −1 |
| Q2 2024 | 10 | — | 1.47M | $48.82M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | State Street Global Advisors ✦ (passive) | 886.96K | — | $42.86M | 0.0% | n/c | 1 | SEC ↗ |
| 2 | Geode Capital Management ✦ (passive) | 569.20K | -0.5% | $27.51M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 3 | Citadel Advisors ✦ | 159.92K | +211.9% | $7.73M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 4 | AQR Capital Management ✦ | 59.85K | -25.1% | $2.89M | 0.0% | ▼ Trim | 3 | SEC ↗ ×4 |
| 5 | Norges Bank ✦ (passive) | 55.11K | -75.7% | $2.66M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 6 | D. E. Shaw & Co. ✦ | 31.28K | -81.8% | $1.51M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 7 | T. Rowe Price ✦ | 23.18K | +6.8% | $1.12M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 8 | Renaissance Technologies ✦ | 12.50K | -73.1% | $604,000 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 9 | Arrowstreet Capital ✦ | 9.86K | New | $476,580 | 0.0% | New | 1 | SEC ↗ |
| 10 | Two Sigma Investments ✦ | 8.55K | -89.2% | $413,233 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 11 | Millennium Management ✦ | 5.59K | -55.7% | $270,060 | 0.0% | ▼ Trim | 3 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Arrowstreet Capital | $476,580 | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 365 holders, 18.97M shares, $2.67B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Officer, Director · 400 sh · $128,810
Officer, Director · 200 sh · $61,417
Officer, Director · 272 sh · $83,909
Officer, Director · 100 sh · $31,183
Officer, Director · 100 sh · $31,320
Officer, Director · 300 sh · $94,451
Officer, Director · 300 sh · $94,877
Officer, Director · 500 sh · $158,662
Officer, Director · 400 sh · $127,318
Officer, Director · 299 sh · $95,580
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology