Stocktoria
Proto Labs Inc PRLB
Proto Labs Inc institutional holders
| Investor | Shares | Value | % of company |
|---|---|---|---|
| BlackRock Finance, Inc. | 4,322,679 | $133.5M | 17.83% |
| RENAISSANCE TECHNOLOGIES LLC | 469,251 | $38.2M | 1.94% |
| D. E. Shaw & Co., Inc. | 211,366 | $17.2M | 0.87% |
| CITADEL ADVISORS LLC | 98,825 | $8.1M | 0.41% |
| MILLENNIUM MANAGEMENT LLC | 92,960 | $7.6M | 0.38% |
| AQR CAPITAL MANAGEMENT LLC | 53,319 | $4.3M | 0.22% |
| Point72 Asset Management, L.P. | 37,033 | $3.0M | 0.15% |
| ARK Investment Management LLC | 35,418 | $2.9M | 0.15% |
% of company = reported institutional shares ÷ shares outstanding. Based on the latest reports; not every holder reports every quarter.
Computed from company filings · US · as of 2025-12-31. Facts plus Stocktoria's own computed scores — not investment advice.