Proto Labs, Inc. (PRLB) Insider Trading
Over the last 3 months, PRLB insiders made 0 open-market buys and 8 sales, a net sale of -$1.8M (SEC Form 4). Over the last 6 months, 168 institutions increased and 152 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
8
Net (3m)
-$1.8M
Insider trades by month Buys Sells
Sep
Aug
Nov
Feb
May
Jun
Context3-month price +18.3%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jun 4, 2026 | WEHRWEIN SVENdirector | Sell | 1,500 | $76.91 |
| Jun 4, 2026 | WEHRWEIN SVENdirector | Sell | 500 | $78.38 |
| May 27, 2026 | Krishna Sureshdirector, officer: President and CEO | Tax | 1,247 | $71.36 |
| May 22, 2026 | Parlange Bernardoofficer: Chief Commercial Officer | Grant | 3,789 | $71.13 |
| May 22, 2026 | Schumacher Danielofficer: Chief Financial Officer | Tax | 255 | $71.13 |
| May 22, 2026 | Parlange Bernardoofficer: Chief Commercial Officer | Grant | 2,109 | — |
| May 21, 2026 | Black Archie C.director | Grant | 2,210 | — |
| May 21, 2026 | WEHRWEIN SVENdirector | Grant | 2,210 | — |
| May 21, 2026 | Gawlick Rainerdirector | Grant | 2,210 | — |
| May 21, 2026 | Chand Sujeetdirector | Grant | 2,210 | — |
| May 21, 2026 | Chin Moonhiedirector | Grant | 2,210 | — |
| May 21, 2026 | KRANTZ DONALD Gdirector | Grant | 2,210 | — |
| May 13, 2026 | Kenison Michael R.officer: Chief Operations Officer | Option | 4,042 | $59.40 |
| May 13, 2026 | Kenison Michael R.officer: Chief Operations Officer | Sell | 4,198 | $68.70 |
| May 13, 2026 | Kenison Michael R.officer: Chief Operations Officer | Sell | 7,433 | $70.26 |
| May 13, 2026 | Kenison Michael R.officer: Chief Operations Officer | Option | 1,928 | $33.84 |
| May 13, 2026 | Kenison Michael R.officer: Chief Operations Officer | Sell | 1,613 | $67.58 |
| May 13, 2026 | Kenison Michael R.officer: Chief Operations Officer | Option | 1,557 | $39.61 |
| May 13, 2026 | Kenison Michael R.officer: Chief Operations Officer | Sell | 3,576 | $69.78 |
| May 13, 2026 | Kenison Michael R.officer: Chief Operations Officer | Option | 3,677 | $33.52 |
| May 13, 2026 | Kenison Michael R.officer: Chief Operations Officer | Option | 3,756 | $33.84 |
| May 13, 2026 | Kenison Michael R.officer: Chief Operations Officer | Sell | 6,643 | $70.30 |
| May 8, 2026 | Kenison Michael R.officer: Chief Operations Officer | Option | 100 | $33.84 |
| May 8, 2026 | Kenison Michael R.officer: Chief Operations Officer | Sell | 200 | $70.00 |
| Feb 27, 2026 | Schumacher Danielofficer: Chief Financial Officer | Grant | 5,605 | $62.63 |
| Feb 27, 2026 | Krishna Sureshdirector, officer: President and CEO | Grant | 24,383 | $62.63 |
| Feb 27, 2026 | Kenison Michael R.officer: Chief Operations Officer | Tax | 531 | $62.63 |
| Feb 27, 2026 | Kermisch Marcofficer: Chief Technology & AI Officer | Grant | 2,795 | — |
| Feb 27, 2026 | Schumacher Danielofficer: Chief Financial Officer | Grant | 3,074 | — |
| Feb 27, 2026 | Kenison Michael R.officer: Chief Operations Officer | Grant | 2,415 | — |
Source: PRLB SEC Form 4 filings, latest Jun 4, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their PRLB positions over the last 6 months (SEC Form 13F).
Increased
168
New positions
86
Reduced
152
Sold out
41
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BLACKROCK, INC. | Increased | 3.7M | May 13, 2026 |
| BLACKROCK, INC. | Reduced | 3.6M | Feb 12, 2026 |
| DISCIPLINED GROWTH INVESTORS INC /MN | Increased | 2.7M | Feb 17, 2026 |
| VANGUARD GROUP INC | Reduced | 2.7M | Jan 29, 2026 |
| DISCIPLINED GROWTH INVESTORS INC /MN | Reduced | 2.5M | May 15, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 1.5M | May 8, 2026 |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 1.3M | Feb 12, 2026 |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 1.3M | May 7, 2026 |
| RUBRIC CAPITAL MANAGEMENT LP | Unchanged | 1.1M | Feb 13, 2026 |
| STATE STREET CORP | Increased | 1.1M | May 15, 2026 |
| STATE STREET CORP | Reduced | 1.1M | Feb 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 1.0M | May 15, 2026 |
| AMERICAN CAPITAL MANAGEMENT INC | Increased | 631K | Feb 17, 2026 |
| AMERICAN CAPITAL MANAGEMENT INC | Reduced | 628K | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 580K | May 15, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.