PRLB — Proto Labs Inc
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2016-01-04.
Performance
Technicals
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Measured signals that fired on PRLB
| date | signal | measured base rate |
|---|---|---|
| 2026-08-19 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-08-12 | Equal highs taken out structure | -0.70% over 21 days · t = -8.28 · n = 68,636 statistically distinguishable from its control group |
| 2026-08-05 | Fair value gap, bullish structure | -0.67% over 21 days · t = -6.43 · n = 111,973 statistically distinguishable from its control group |
| 2026-08-04 | Breakout to a 52-week high price | -1.00% over 21 days · t = -8.58 · n = 24,386 statistically distinguishable from its control group |
| 2026-07-08 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-05-27 | Fair value gap, bullish structure | -0.67% over 21 days · t = -6.43 · n = 111,973 statistically distinguishable from its control group |
Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →
Insider transactions (Form 4)
| date | insider | what | shares | price | value |
|---|---|---|---|---|---|
| 2026-06-02 | WEHRWEIN SVEN Director | Open-market sale | 1.5K | 76.91 | 115.4K |
| 2026-06-02 | WEHRWEIN SVEN Director | Open-market sale | 500 | 78.38 | 39.2K |
| 2026-05-23 | Krishna Suresh President and CEO | Shares withheld for tax | 1.2K | 71.36 | 89.0K |
| 2026-05-20 | Schumacher Daniel Chief Financial Officer | Shares withheld for tax | 255 | 71.13 | 18.1K |
| 2026-05-20 | Parlange Bernardo Chief Commercial Officer | Grant or award | 2.1K | 0.00 | 0 |
| 2026-05-19 | Chand Sujeet Director | Grant or award | 2.2K | 0.00 | 0 |
| 2026-05-19 | KRANTZ DONALD G Director | Grant or award | 2.2K | 0.00 | 0 |
| 2026-05-19 | Gawlick Rainer Director | Grant or award | 2.2K | 0.00 | 0 |
| 2026-05-19 | Chin Moonhie Director | Grant or award | 2.2K | 0.00 | 0 |
| 2026-05-19 | Black Archie C. Director | Grant or award | 2.2K | 0.00 | 0 |
Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →
Largest institutional holders
| manager | value | shares |
|---|---|---|
| BlackRock, Inc. | 209.7M | 3.7M |
| DISCIPLINED GROWTH INVESTORS INC /MN | 142.4M | 2.5M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 87.7M | 1.5M |
| DIMENSIONAL FUND ADVISORS LP | 72.5M | 1.3M |
| STATE STREET CORP | 62.3M | 1.1M |
| VANGUARD CAPITAL MANAGEMENT LLC | 59.3M | 1.0M |
| AMERICAN CAPITAL MANAGEMENT INC | 35.8M | 627.7K |
| GEODE CAPITAL MANAGEMENT, LLC | 33.1M | 580.2K |
| RENAISSANCE TECHNOLOGIES LLC | 29.7M | 520.3K |
| Rubric Capital Management LP | 27.7M | 486.4K |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
Recent headlines
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