12 insiders reported 56 Form 4 transactions for Proto Labs Inc (PRLB) over the past 18 months (most recent 2026-06-04). Recent activity: WEHRWEIN SVEN (Director) Sell 1,500 shares, WEHRWEIN SVEN (Director) Sell 500 shares, Krishna Suresh (President and CEO) Sell 1,247 shares, Schumacher Daniel (Chief Financial Officer) Sell 255 shares, Parlange Bernardo (Chief Commercial Officer) Buy 2,109 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-04 | WEHRWEIN SVEN | Director | Sell | 1,500 | $115,360 |
| 2026-06-04 | WEHRWEIN SVEN | Director | Sell | 500 | $39,190 |
| 2026-05-27 | Krishna Suresh | President and CEO | Sell | 1,247 | $88,986 |
| 2026-05-22 | Schumacher Daniel | Chief Financial Officer | Sell | 255 | $18,138 |
| 2026-05-22 | Parlange Bernardo | Chief Commercial Officer | Buy | 2,109 | $0 |
| 2026-05-21 | KRANTZ DONALD G | Director | Buy | 2,210 | $0 |
| 2026-05-21 | WEHRWEIN SVEN | Director | Buy | 2,210 | $0 |
| 2026-05-21 | Chand Sujeet | Director | Buy | 2,210 | $0 |
| 2026-05-21 | Chin Moonhie | Director | Buy | 2,210 | $0 |
| 2026-05-21 | Black Archie C. | Director | Buy | 2,210 | $0 |
| 2026-05-21 | Gawlick Rainer | Director | Buy | 2,210 | $0 |
| 2026-05-13 | Kenison Michael R. | Chief Operations Officer | Sell | 1,613 | $109,008 |
| 2026-05-13 | Kenison Michael R. | Chief Operations Officer | Buy | 3,677 | $123,253 |
| 2026-05-13 | Kenison Michael R. | Chief Operations Officer | Sell | 7,433 | $522,251 |
| 2026-05-13 | Kenison Michael R. | Chief Operations Officer | Buy | 1,928 | $65,244 |
| 2026-05-13 | Kenison Michael R. | Chief Operations Officer | Buy | 1,557 | $61,673 |
| 2026-05-13 | Kenison Michael R. | Chief Operations Officer | Buy | 4,042 | $240,095 |
| 2026-05-13 | Kenison Michael R. | Chief Operations Officer | Buy | 3,756 | $127,103 |
| 2026-05-13 | Kenison Michael R. | Chief Operations Officer | Sell | 4,198 | $288,390 |
| 2026-05-13 | Kenison Michael R. | Chief Operations Officer | Sell | 3,576 | $249,542 |
| 2026-05-13 | Kenison Michael R. | Chief Operations Officer | Sell | 6,643 | $466,975 |
| 2026-05-08 | Kenison Michael R. | Chief Operations Officer | Buy | 100 | $3,384 |
| 2026-05-08 | Kenison Michael R. | Chief Operations Officer | Buy | 100 | $3,352 |
| 2026-05-08 | Kenison Michael R. | Chief Operations Officer | Sell | 200 | $14,000 |
| 2026-02-27 | Krishna Suresh | President and CEO | Buy | 13,373 | $0 |
Source: SEC Form 4 filings · as of 2026-06-04