14 insiders reported 67 Form 4 transactions for Proto Labs Inc (PRLB) over the past 18 months (most recent 2026-05-22). Recent activity: Schumacher Daniel (Chief Financial Officer) Sell 255 shares, Parlange Bernardo (Chief Commercial Officer) Buy 2,109 shares, KRANTZ DONALD G (Director) Buy 2,210 shares, WEHRWEIN SVEN (Director) Buy 2,210 shares, Chand Sujeet (Director) Buy 2,210 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 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 | Buy | 1,557 | $61,673 |
| 2026-05-13 | Kenison Michael R. | Chief Operations Officer | Buy | 3,677 | $123,253 |
| 2026-05-13 | Kenison Michael R. | Chief Operations Officer | Buy | 3,756 | $127,103 |
| 2026-05-13 | Kenison Michael R. | Chief Operations Officer | Buy | 1,928 | $65,244 |
| 2026-05-13 | Kenison Michael R. | Chief Operations Officer | Buy | 4,042 | $240,095 |
| 2026-05-13 | Kenison Michael R. | Chief Operations Officer | Sell | 1,613 | $109,008 |
| 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 |
| 2026-05-13 | Kenison Michael R. | Chief Operations Officer | Sell | 7,433 | $522,251 |
| 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 | Kermisch Marc | Chief Technology & AI Officer | Buy | 2,795 | $0 |
| 2026-02-27 | Krishna Suresh | President and CEO | Buy | 13,373 | $0 |
| 2026-02-27 | Schumacher Daniel | Chief Financial Officer | Buy | 3,074 | $0 |
| 2026-02-27 | Schumacher Daniel | Chief Financial Officer | Sell | 504 | $31,566 |
Source: SEC Form 4 filings · as of 2026-05-22