PROTO LABS INC (PRLB) — insider trading
Industrials · NYSE
PROTO LABS INC (PRLB) has 35 reported SEC Form 4 insider transactions in our data, including 11 open-market sales among the most recent 35 (latest 2026-09-24).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-24 | Schumacher Daniel | Officer (Chief Financial Officer) | Open-market sale | 5,000 | $95.32 | $476.6K | Form 4 |
| 2026-09-17 | Schumacher Daniel | Officer (Chief Financial Officer) | Open-market sale | 4,900 | $85.21 | $417.5K | Form 4 |
| 2026-09-16 | Schumacher Daniel | Officer (Chief Financial Officer) | Open-market sale | 100 | $85.00 | $8.5K | Form 4 |
| 2026-06-02 | WEHRWEIN SVEN | Director | Open-market sale | 500 | $78.38 | $39.2K | Form 4 |
| 2026-06-02 | WEHRWEIN SVEN | Director | Open-market sale | 1,500 | $76.91 | $115.4K | Form 4 |
| 2026-05-23 | Krishna Suresh | Director, Officer (President and CEO) | Shares withheld for taxes / exercise cost | 1,247 | $71.36 | $89.0K | Form 4 |
| 2026-05-20 | Parlange Bernardo | Officer (Chief Commercial Officer) | Grant / award / vesting (derivative) | 3,789 | — | $0 | Form 4 |
| 2026-05-20 | Parlange Bernardo | Officer (Chief Commercial Officer) | Grant / award / vesting | 2,109 | — | $0 | Form 4 |
| 2026-05-20 | Schumacher Daniel | Officer (Chief Financial Officer) | Shares withheld for taxes / exercise cost | 255 | $71.13 | $18.1K | Form 4 |
| 2026-05-19 | KRANTZ DONALD G | Director | Grant / award / vesting | 2,210 | — | $0 | Form 4 |
| 2026-05-19 | WEHRWEIN SVEN | Director | Grant / award / vesting | 2,210 | — | $0 | Form 4 |
| 2026-05-19 | Gawlick Rainer | Director | Grant / award / vesting | 2,210 | — | $0 | Form 4 |
| 2026-05-19 | Chin Moonhie | Director | Grant / award / vesting | 2,210 | — | $0 | Form 4 |
| 2026-05-19 | Chand Sujeet | Director | Grant / award / vesting | 2,210 | — | $0 | Form 4 |
| 2026-05-19 | Black Archie C. | Director | Grant / award / vesting | 2,210 | — | $0 | Form 4 |
| 2026-05-12 | Kenison Michael R. | Officer (Chief Operations Officer) | Option exercise / conversion (derivative) | 4,042 | — | $0 | Form 4 |
| 2026-05-12 | Kenison Michael R. | Officer (Chief Operations Officer) | Option exercise / conversion (derivative) | 1,557 | — | $0 | Form 4 |
| 2026-05-12 | Kenison Michael R. | Officer (Chief Operations Officer) | Option exercise / conversion (derivative) | 1,928 | — | $0 | Form 4 |
| 2026-05-12 | Kenison Michael R. | Officer (Chief Operations Officer) | Open-market sale | 6,643 | $70.30 | $467.0K | Form 4 |
| 2026-05-12 | Kenison Michael R. | Officer (Chief Operations Officer) | Open-market sale | 3,576 | $69.78 | $249.5K | Form 4 |
| 2026-05-12 | Kenison Michael R. | Officer (Chief Operations Officer) | Open-market sale | 4,198 | $68.70 | $288.4K | Form 4 |
| 2026-05-12 | Kenison Michael R. | Officer (Chief Operations Officer) | Open-market sale | 1,613 | $67.58 | $109.0K | Form 4 |
| 2026-05-12 | Kenison Michael R. | Officer (Chief Operations Officer) | Option exercise / conversion | 4,042 | $59.40 | $240.1K | Form 4 |
| 2026-05-12 | Kenison Michael R. | Officer (Chief Operations Officer) | Option exercise / conversion | 1,557 | $39.61 | $61.7K | Form 4 |
| 2026-05-12 | Kenison Michael R. | Officer (Chief Operations Officer) | Option exercise / conversion | 1,928 | $33.84 | $65.2K | Form 4 |
| 2026-05-11 | Kenison Michael R. | Officer (Chief Operations Officer) | Option exercise / conversion (derivative) | 3,677 | — | $0 | Form 4 |
| 2026-05-11 | Kenison Michael R. | Officer (Chief Operations Officer) | Option exercise / conversion (derivative) | 3,756 | — | $0 | Form 4 |
| 2026-05-11 | Kenison Michael R. | Officer (Chief Operations Officer) | Open-market sale | 7,433 | $70.26 | $522.3K | Form 4 |
| 2026-05-11 | Kenison Michael R. | Officer (Chief Operations Officer) | Option exercise / conversion | 3,677 | $33.52 | $123.3K | Form 4 |
| 2026-05-11 | Kenison Michael R. | Officer (Chief Operations Officer) | Option exercise / conversion | 3,756 | $33.84 | $127.1K | Form 4 |
| 2026-05-07 | Kenison Michael R. | Officer (Chief Operations Officer) | Option exercise / conversion (derivative) | 100 | — | $0 | Form 4 |
| 2026-05-07 | Kenison Michael R. | Officer (Chief Operations Officer) | Option exercise / conversion (derivative) | 100 | — | $0 | Form 4 |
| 2026-05-07 | Kenison Michael R. | Officer (Chief Operations Officer) | Open-market sale | 200 | $70.00 | $14.0K | Form 4 |
| 2026-05-07 | Kenison Michael R. | Officer (Chief Operations Officer) | Option exercise / conversion | 100 | $33.52 | $3.4K | Form 4 |
| 2026-05-07 | Kenison Michael R. | Officer (Chief Operations Officer) | Option exercise / conversion | 100 | $33.84 | $3.4K | Form 4 |
Ask the chat about PRLB's insider activity →
Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: PROTO LABS INC (PRLB).
Last updated 2026-09-24 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.