PRLB
Proto Labs, Inc. · Industrials · Manufacturing - Miscellaneous
Momentum inputs (comparable managers): holder breadth 0.0% · share flow -4.9% · net new positions 0.0% — formula
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 98 | 0 | 14.60M | $1.19B | +4 | −6 |
| Q1 2026 | 103 | +16 | 13.93M | $794.05M | +17 | −1 |
| Q4 2025 | 87 | 0 | 14.72M | $745.02M | +1 | −1 |
| Q3 2025 | 18 | 0 | 10.50M | $525.51M | — | — |
| Q2 2025 | 15 | 0 | 10.12M | $405.31M | +1 | −1 |
| Q1 2025 | 12 | -2 | 4.14M | $145.11M | — | −2 |
| Q4 2024 | 14 | +1 | 3.70M | $144.79M | +1 | — |
| Q3 2024 | 12 | -2 | 2.43M | $71.29M | — | −2 |
| Q2 2024 | 14 | — | 2.60M | $80.36M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 3.65M | — | $146.25M | 0.0% | n/c | 1 | SEC ↗ ×15 |
| 2 | The Vanguard Group ✦ (passive) | 2.77M | — | $111.03M | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 3 | State Street Global Advisors ✦ (passive) | 1.19M | +5.8% | $47.51M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 4 | Geode Capital Management ✦ (passive) | 562.34K | -2.9% | $22.52M | 0.0% | ▼ Trim | 5 | SEC ↗ ×2 |
| 5 | Renaissance Technologies ✦ | 542.05K | +2.0% | $21.70M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 6 | D. E. Shaw & Co. ✦ | 452.69K | -15.8% | $18.13M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 7 | Arrowstreet Capital ✦ | 447.13K | -0.7% | $17.90M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 8 | Millennium Management ✦ | 155.17K | New | $6.21M | 0.0% | New | 1 | SEC ↗ |
| 9 | Citadel Advisors ✦ | 123.94K | +880.9% | $4.96M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 10 | Fidelity (FMR) ✦ | 79.52K | — | $3.18M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 11 | ARK Investment Management ✦ | 79.50K | -8.7% | $3.18M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 12 | T. Rowe Price ✦ | 26.03K | +3.7% | $1.04M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 13 | AQR Capital Management ✦ | 21.30K | -66.7% | $852,691 | 0.0% | ▼ Trim | 5 | SEC ↗ ×5 |
| 14 | Gotham Asset Management ✦ | 15.53K | +4.9% | $621,901 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 15 | Two Sigma Investments ✦ | 5.60K | -15.2% | $224,224 | 0.0% | ▼ Trim | 5 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Millennium Management | $6.21M | 0.0% |
Exited
| Wellington Management | $24.94M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 259 holders, 21.98M shares, $1.24B 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 · 5.00K sh · $476,604
Officer · 4.90K sh · $417,535
Officer · 100 sh · $8,500
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology