PRLB
Proto Labs, Inc. · Industrials · Manufacturing - Miscellaneous
Momentum inputs (comparable managers):
holder breadth -14.3% ·
share flow +11.8% ·
net new positions -16.7%
— formula
Concentrated accumulation — rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 99 | -1 | 14.61M | $1.19B | +4 | −5 |
| 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 | State Street Global Advisors ✦ (passive) | 1.12M | -2.4% | $39.28M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 2 | Wellington Management ✦ | 711.74K | +97.3% | $24.94M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 3 | Wellington Management ✦ | 711.74K | +97.3% | $24.94M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 4 | Wellington Management ✦ | 711.74K | +97.3% | $24.94M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 5 | Wellington Management ✦ | 711.74K | +97.3% | $24.94M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 6 | Wellington Management ✦ | 711.74K | +97.3% | $24.94M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 7 | Wellington Management ✦ | 711.74K | +97.3% | $24.94M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 8 | Geode Capital Management ✦ (passive) | 579.33K | +1.6% | $20.30M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 9 | Geode Capital Management ✦ (passive) | 579.33K | +1.6% | $20.30M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 10 | D. E. Shaw & Co. ✦ | 537.37K | +7.3% | $18.83M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 11 | Renaissance Technologies ✦ | 531.65K | -7.0% | $18.63M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 12 | Arrowstreet Capital ✦ | 450.07K | +111.4% | $15.77M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 13 | ARK Investment Management ✦ | 87.05K | -32.3% | $3.05M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 14 | AQR Capital Management ✦ | 63.87K | +3.3% | $2.24M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 15 | AQR Capital Management ✦ | 63.87K | +3.3% | $2.24M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 16 | AQR Capital Management ✦ | 63.87K | +3.3% | $2.24M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 17 | AQR Capital Management ✦ | 63.87K | +3.3% | $2.24M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 18 | AQR Capital Management ✦ | 63.87K | +3.3% | $2.24M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 19 | T. Rowe Price ✦ | 25.11K | +2.5% | $880,000 | 0.0% | ▲ Add | 4 | SEC ↗ |
| 20 | Gotham Asset Management ✦ | 14.81K | +14.4% | $518,907 | 0.0% | ▲ Add | 4 | SEC ↗ |
| 21 | Citadel Advisors ✦ | 12.63K | -15.7% | $442,730 | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 22 | Two Sigma Investments ✦ | 6.60K | -55.9% | $231,264 | 0.0% | ▼ Trim | 4 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| Norges Bank | $1.95M | was 0.0% |
| Millennium Management | $1.21M | 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.