Form 4 for PRLB Proto Labs Inc
Accepted 2026-05-13 16:40:37 ET · period of report 2026-05-11 · accession 0001628280-26-034651 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DMT | 2026-05-13 16:40 | 2026-05-11+ | PRLB | Kenison Michael R. | Chief Ops Off | M - OptEx | $41.27 | +15.0K | 34.7K | +76% | +$617.4K |
| DMT | 2026-05-13 16:40 | 2026-05-11+ | PRLB | Kenison Michael R. | Chief Ops Off | S - Sale+OE | $69.73 | -23.5K | 18.7K | -56% | -$1.64M |
| DMT | 2026-05-13 16:40 | 2026-05-11+ | PRLB | Kenison Michael R. | Chief Ops Off | M - OptEx | $0.00 | -15.0K | 0 | -100% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-05-11 | M | A | 3,756 | $33.84 | 30,942 | D | — | — | (F1) These shares were acquired and sold pursuant to Reporting Person's 10b5-1 plan adopted August 15, 2025. |
| 2 | Common | Common Stock | 2026-05-11 | M | A | 3,677 | $33.52 | 34,619 | D | — | — | (F1) These shares were acquired and sold pursuant to Reporting Person's 10b5-1 plan adopted August 15, 2025. |
| 3 | Common | Common Stock | 2026-05-11 | S | D | 7,433 | $70.26 | 27,186 | D | — | — | (F1) These shares were acquired and sold pursuant to Reporting Person's 10b5-1 plan adopted August 15, 2025. (F2) Reflects the weighted average price of 7,433 shares of common stock of Proto Labs Inc. sold by the reporting person in multiple transactions on May 11, 2026, with sale prices ranging from $70.00 to $70.57 per share. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. |
| 4 | Common | Common Stock | 2026-05-12 | M | A | 1,928 | $33.84 | 29,114 | D | — | — | |
| 5 | Common | Common Stock | 2026-05-12 | M | A | 1,557 | $39.61 | 30,671 | D | — | — | |
| 6 | Common | Common Stock | 2026-05-12 | M | A | 4,042 | $59.40 | 34,713 | D | — | — | |
| 7 | Common | Common Stock | 2026-05-12 | S | D | 1,613 | $67.58 | 33,100 | D | — | — | (F3) Reflects the weighted average price of 1,613 shares of common stock of Proto Labs Inc. sold by the reporting person in multiple transactions on May 12, 2026, with sale prices ranging from $67.06 to $68.05 per share. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. |
| 8 | Common | Common Stock | 2026-05-12 | S | D | 4,198 | $68.70 | 28,902 | D | — | — | (F4) Reflects the weighted average price of 4,198 shares of common stock of Proto Labs Inc. sold by the reporting person in multiple transactions on May 12, 2026, with sale prices ranging from $68.10 to $69.0425 per share. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. |
| 9 | Common | Common Stock | 2026-05-12 | S | D | 3,576 | $69.78 | 25,326 | D | — | — | (F5) Reflects the weighted average price of 3,576 shares of common stock of Proto Labs Inc. sold by the reporting person in multiple transactions on May 12, 2026, with sale prices ranging from $69.13 to $70.1181 per share. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. |
| 10 | Common | Common Stock | 2026-05-12 | S | D | 6,643 | $70.30 | 18,683 | D | — | — | (F6) Reflects the weighted average price of 6,643 shares of common stock of Proto Labs Inc. sold by the reporting person in multiple transactions on May 12, 2026, with sale prices ranging from $70.13 to $70.57 per share. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. |
| 11 | Derivative | Employee Stock Option (right to buy) | 2026-05-11 | M | D | 3,756 | $0.00 | 3,856 | D | $33.84 · — to 2033-02-14 | 3,756 Common Stock | (F1) These shares were acquired and sold pursuant to Reporting Person's 10b5-1 plan adopted August 15, 2025. (F7) 25% of shares subject to the award will vest on February 13, 2024, and on each February 13th thereafter until all shares subject to the award are fully vested. |
| 12 | Derivative | Employee Stock Option (right to buy) | 2026-05-11 | M | D | 3,677 | $0.00 | 3,778 | D | $33.52 · — to 2034-02-13 | 3,677 Common Stock | (F1) These shares were acquired and sold pursuant to Reporting Person's 10b5-1 plan adopted August 15, 2025. (F8) 25% of shares subject to the award will vest on February 13, 2025, and on each February 13th thereafter until all shares subject to the award are fully vested. |
| 13 | Derivative | Employee Stock Option (right to buy) | 2026-05-12 | M | D | 1,928 | $0.00 | 1,928 | D | $33.84 · — to 2033-02-14 | 1,928 Common Stock | (F7) 25% of shares subject to the award will vest on February 13, 2024, and on each February 13th thereafter until all shares subject to the award are fully vested. |
| 14 | Derivative | Employee Stock Option (right to buy) | 2026-05-12 | M | D | 1,557 | $0.00 | 4,674 | D | $39.61 · — to 2035-02-25 | 1,557 Common Stock | (F9) 25% of shares subject to the award will vest on February 25, 2026, and on each February 25th thereafter until all shares subject to the award are fully vested. |
| 15 | Derivative | Employee Stock Option (right to buy) | 2026-05-12 | M | D | 4,042 | $0.00 | 0 | D | $59.40 · — to 2032-02-13 | 4,042 Common Stock | (F10) 25% of shares subject to the award will vest on February 13, 2023, and on each February 13th thereafter until all shares subject to the award are fully vested. |