Proto Labs Inc PRLB
CIK 0001443669 · CUSIP 743713109
Quarter-end disclosures, not live holdings.
Top 20 institutions
Weight means this stock's share of the manager's own portfolio.
| # | Manager | Value | Manager weight | Change vs prior | Source | |
|---|---|---|---|---|---|---|
| 01 | BlackRock, Inc. CIK 2012383 · View history | $209.71M 3,677,875 shares | 0.00% | +58.87K(+1.60%)Added | SEC filing ↗ May 13, 2026 | ▾ |
| 02 | DISCIPLINED GROWTH INVESTORS INC /MN CIK 1050442 · View history | $142.40M 2,497,355 shares | 2.91% | -176.37K(-6.60%)Reduced | SEC filing ↗ May 15, 2026 | ▾ |
| 03 | VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · Amended · View history | $87.73M 1,538,530 shares | 0.00% | — | SEC filing ↗ May 8, 2026 | ▾ |
| 04 | DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history | $72.55M 1,272,356 shares | 0.02% | -4.21K(-0.30%)Reduced | SEC filing ↗ May 7, 2026 | ▾ |
| 05 | STATE STREET CORP CIK 93751 · View history | $62.27M 1,092,000 shares | 0.00% | +3.79K(+0.30%)Added | SEC filing ↗ May 15, 2026 | ▾ |
| 06 | VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history | $59.29M 1,039,741 shares | 0.00% | — | SEC filing ↗ May 15, 2026 | ▾ |
| 07 | AMERICAN CAPITAL MANAGEMENT INC CIK 1320168 · View history | $35.79M 627,705 shares | 1.92% | -3.61K(-0.60%)Reduced | SEC filing ↗ May 15, 2026 | ▾ |
| 08 | GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history | $33.09M 580,201 shares | 0.00% | +21.90K(+3.90%)Added | SEC filing ↗ May 15, 2026 | ▾ |
| 09 | RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history | $29.66M 520,251 shares | 0.05% | +26.70K(+5.40%)Added | SEC filing ↗ May 14, 2026 | ▾ |
| 10 | Rubric Capital Management LP CIK 1687509 · View history | $27.73M 486,400 shares | 0.34% | -636.94K(-56.70%)Reduced | SEC filing ↗ May 15, 2026 | ▾ |
| 11 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP CIK 1164508 · View history | $26.44M 463,780 shares | 0.01% | +3.16K(+0.70%)Added | SEC filing ↗ May 14, 2026 | ▾ |
| 12 | FMR LLC CIK 315066 · View history | $24.08M 422,356 shares | 0.00% | +300.26K(+245.90%)Added | SEC filing ↗ May 15, 2026 | ▾ |
| 13 | PRUDENTIAL FINANCIAL INC CIK 1137774 · View history | $22.82M 400,241 shares | 0.03% | +217.41K(+118.90%)Added | SEC filing ↗ May 13, 2026 | ▾ |
| 14 | Driehaus Capital Management LLC CIK 938206 · View history | $21.05M 369,136 shares | 0.15% | -13.02K(-3.40%)Reduced | SEC filing ↗ May 15, 2026 | ▾ |
| 15 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history | $20.54M 360,203 shares | 0.00% | -2.81K(-0.80%)Reduced | SEC filing ↗ May 15, 2026 | ▾ |
| 16 | Nuveen, LLC CIK 1871926 · View history | $18.07M 316,939 shares | 0.00% | -8.81K(-2.70%)Reduced | SEC filing ↗ Apr 30, 2026 | ▾ |
| 17 | S Squared Technology, LLC CIK 1322924 · Amended · View history | $16.88M 296,103 shares | 6.39% | -10.00K(-3.30%)Reduced | SEC filing ↗ May 15, 2026 | ▾ |
| 18 | MORGAN STANLEY CIK 895421 · View history | $16.74M 293,581 shares | 0.00% | -12.03K(-3.90%)Reduced | SEC filing ↗ May 15, 2026 | ▾ |
| 19 | NORTHERN TRUST CORP CIK 73124 · View history | $15.22M 266,951 shares | 0.00% | +10.68K(+4.20%)Added | SEC filing ↗ May 14, 2026 | ▾ |
| 20 | D. E. Shaw & Co., Inc. CIK 1009207 · View history | $12.87M 225,651 shares | 0.01% | +12.78K(+6.00%)Added | SEC filing ↗ May 15, 2026 | ▾ |
Showing 20 / 263 institutions. The complete set is available through the API.
Coverage & totals by quarter
Reporting institutions by quarter
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