Proto Labs Inc (NYSE:PRLB) has 229 institutional investors that have filed 13F reports for the period ending December 2025.
| Owner Name | Date | Shares Held | Change (QoQ) | Change (%) | Value (USD) |
|---|---|---|---|---|---|
| BlackRock, Inc. | 31 Mar, 2026 | 3,677,875 | 58,871 | 1.63% | $209,712,432.00 |
| DISCIPLINED GROWTH INVESTORS INC /MN | 31 Mar, 2026 | 2,497,355 | -176,374 | -6.60% | $142,399,182.00 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 31 Mar, 2026 | 1,538,530 | 1,538,530 | 0.00% | $87,726,981.00 |
| DIMENSIONAL FUND ADVISORS LP | 31 Mar, 2026 | 1,272,356 | -4,205 | -0.33% | $72,547,694.00 |
| State Street Corp | 31 Mar, 2026 | 1,092,000 | 3,794 | 0.35% | $62,265,840.00 |
| VANGUARD CAPITAL MANAGEMENT LLC | 31 Mar, 2026 | 1,039,741 | 1,039,741 | 0.00% | $59,286,032.00 |
| AMERICAN CAPITAL MANAGEMENT INC | 31 Mar, 2026 | 627,705 | -3,606 | -0.57% | $35,791,739.00 |
| S SQUARED TECHNOLOGY, LLC | 31 Mar, 2026 | 592,206 | 286,103 | 93.47% | $33,767,586.00 |
| GEODE CAPITAL MANAGEMENT, LLC | 31 Mar, 2026 | 580,201 | 21,901 | 3.92% | $33,089,796.00 |
| RENAISSANCE TECHNOLOGIES LLC | 31 Mar, 2026 | 520,251 | 26,700 | 5.41% | $29,664,712.00 |
| Rubric Capital Management LP | 31 Mar, 2026 | 486,400 | -636,938 | -56.70% | $27,734,528.00 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 31 Mar, 2026 | 463,780 | 3,162 | 0.69% | $26,444,736.00 |
| FMR LLC | 31 Mar, 2026 | 422,356 | 300,256 | 245.91% | $24,082,734.00 |
| Prudential Financial Inc | 31 Mar, 2026 | 400,241 | 217,415 | 118.92% | $22,821,742.00 |
| DRIEHAUS CAPITAL MANAGEMENT LLC | 31 Mar, 2026 | 369,136 | -13,019 | -3.41% | $21,048,135.00 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 31 Mar, 2026 | 360,203 | -2,810 | -0.77% | $20,538,775.00 |
| Nuveen, LLC | 31 Mar, 2026 | 316,939 | -8,811 | -2.70% | $18,071,862.00 |
| Morgan Stanley | 31 Mar, 2026 | 293,581 | -12,031 | -3.94% | $16,740,055.00 |
| Northern Trust Corp | 31 Mar, 2026 | 266,951 | 10,683 | 4.17% | $15,221,546.00 |
| D. E. Shaw & Co., Inc. | 31 Mar, 2026 | 225,651 | 12,783 | 6.01% | $12,866,620.00 |