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About Proto Labs Inc (PRLB)
The SEC lists Proto Labs Inc under CIK 0001443669, in fabricated structural metal products. It is grouped with Materials companies on this site.
PRLB Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 3 | 10,000 | $903K |
PRLB insider transactions (Form 4)
6331 Form 4 filings on record, the earliest from May 23, 2025, newest first. Filing history page 1 of 2.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Daniel Schumacher - Officer | Open-market sale | Common Stock | 5,000 | $95.32 footnote F2 | $477K | |
| ||||||
| Daniel Schumacher - Officer | Open-market sale | Common Stock | 100 | $85.00 | $9K | |
| Daniel Schumacher - Officer | Open-market sale | Common Stock | 4,900 | $85.21 footnote F2 | $418K | |
| ||||||
 Sven Wehrwein - Director | Open-market sale | Common Stock | 500 | $78.38 | $39K | |
| Sven Wehrwein - Director | Open-market sale | Common Stock | 1,500 | $76.91 footnote F1 | $115K | |
| ||||||
 Suresh Krishna - Officer | Tax withholding / forfeiture | Common Stock | 1,247 | $71.36 | $89K | |
| Daniel Schumacher - Officer | Tax withholding / forfeiture | Common Stock | 255 | $71.13 | $18K | |
| Bernardo Parlange - Officer | Grant or award | Common Stock | 2,109 footnote F1 | $0.00 | - | |
| Bernardo Parlange - Officer | Grant or award | Employee Stock Option (right to buy) | 3,789 | $0.00 | - | |
| ||||||
| Archie C. Black - Director | Grant or award | Common Stock | 2,210 footnote F1 | $0.00 | - | |
| ||||||
| Sujeet Chand - Director | Grant or award | Common Stock | 2,210 footnote F1 | $0.00 | - | |
| ||||||
| Moonhie Chin - Director | Grant or award | Common Stock | 2,210 footnote F1 | $0.00 | - | |
| ||||||
 Rainer Gawlick - Director | Grant or award | Common Stock | 2,210 footnote F1 | $0.00 | - | |
| ||||||
| Sven Wehrwein - Director | Grant or award | Common Stock | 2,210 footnote F1 | $0.00 | - | |
| ||||||
| Donald G. Krantz - Director | Grant or award | Common Stock | 2,210 footnote F1 | $0.00 | - | |
| ||||||
| Michael R. Kenison - Officer | Option exercise | Common Stock | 1,928 | $33.84 | $65K | |
| Michael R. Kenison - Officer | Option exercise | Common Stock | 1,557 | $39.61 | $62K | |
| Michael R. Kenison - Officer | Option exercise | Common Stock | 4,042 | $59.40 | $240K | |
| Michael R. Kenison - Officer | Option exercise | Common Stock | 3,756 | $33.84 | $127K | |
| Michael R. Kenison - Officer | Option exercise | Common Stock | 3,677 | $33.52 | $123K | |
| Michael R. Kenison - Officer | Open-market sale | Common Stock | 7,433 | $70.26 footnote F2 | $522K | |
| Michael R. Kenison - Officer | Open-market sale | Common Stock | 1,613 | $67.58 footnote F3 | $109K | |
| Michael R. Kenison - Officer | Open-market sale | Common Stock | 4,198 | $68.70 footnote F4 | $288K | |
| Michael R. Kenison - Officer | Open-market sale | Common Stock | 3,576 | $69.78 footnote F5 | $250K | |
| Michael R. Kenison - Officer | Open-market sale | Common Stock | 6,643 | $70.30 footnote F6 | $467K | |
| Michael R. Kenison - Officer | Option exercise | Employee Stock Option (right to buy) | 3,756 | $0.00 | - | |
| Michael R. Kenison - Officer | Option exercise | Employee Stock Option (right to buy) | 3,677 | $0.00 | - | |
| Michael R. Kenison - Officer | Option exercise | Employee Stock Option (right to buy) | 1,928 | $0.00 | - | |
| Michael R. Kenison - Officer | Option exercise | Employee Stock Option (right to buy) | 1,557 | $0.00 | - | |
| Michael R. Kenison - Officer | Option exercise | Employee Stock Option (right to buy) | 4,042 | $0.00 | - | |
| ||||||
| Michael R. Kenison - Officer | Option exercise | Common Stock | 100 | $33.84 | $3K | |
| Michael R. Kenison - Officer | Option exercise | Common Stock | 100 | $33.52 | $3K | |
| Michael R. Kenison - Officer | Open-market sale | Common Stock | 200 | $70.00 | $14K | |
| Michael R. Kenison - Officer | Option exercise | Employee Stock Option (right to buy) | 100 | $0.00 | - | |
| Michael R. Kenison - Officer | Option exercise | Employee Stock Option (right to buy) | 100 | $0.00 | - | |
| Suresh Krishna - Officer | Grant or award | Common Stock | 13,373 footnote F1 | $0.00 | - | |
| Suresh Krishna - Officer | Grant or award | Employee Stock Option (right to buy) | 24,383 | $0.00 | - | |
| ||||||
| Daniel Schumacher - Officer | Tax withholding / forfeiture | Common Stock | 504 | $62.63 | $32K | |
| Daniel Schumacher - Officer | Grant or award | Common Stock | 3,074 footnote F1 | $0.00 | - | |
| Daniel Schumacher - Officer | Grant or award | Employee Stock Option (right to buy) | 5,605 | $0.00 | - | |
| ||||||
| Michael R. Kenison - Officer | Tax withholding / forfeiture | Common Stock | 531 | $62.63 | $33K | |
| Michael R. Kenison - Officer | Grant or award | Common Stock | 2,415 footnote F1 | $0.00 | - | |
| Michael R. Kenison - Officer | Grant or award | Employee Stock Option (right to buy) | 4,404 | $0.00 | - | |
| ||||||
| Marc Kermisch - Officer | Grant or award | Common Stock | 2,795 footnote F1 | $0.00 | - | |
| Marc Kermisch - Officer | Grant or award | Employee Stock Option (right to buy) | 5,095 | $0.00 | - | |
| ||||||
| Daniel Schumacher - Officer | Tax withholding / forfeiture | Common Stock | 1,267 | $67.52 | $86K | |
| Michael R. Kenison - Officer | Tax withholding / forfeiture | Common Stock | 1,540 | $67.52 | $104K | |
| Michael R. Kenison - Officer | Open-market sale | Common Stock | 5,000 | $66.46 footnote F2 | $332K | |
| ||||||
| Michael R. Kenison - Officer | Tax withholding / forfeiture | Common Stock | 2,684 | $53.18 | $143K | |
| Daniel Schumacher - Officer | Tax withholding / forfeiture | Common Stock | 6,809 | $53.18 | $362K | |
| Daniel Schumacher - Officer | Option exercise | Common Stock | 3,135 | $33.84 | $106K | |
| Daniel Schumacher - Officer | Option exercise | Employee Stock Option (right to buy) | 3,135 | $0.00 | - | |
| Michael R. Kenison - Officer | Open-market sale | Common Stock | 2,500 | $60.00 | $150K | |
| Michael R. Kenison - Officer | Grant or award | Common Stock | 8,128 | $0.00 | - | |
| Daniel Schumacher - Officer | Grant or award | Common Stock | 20,686 | $0.00 | - | |
| Michael R. Kenison - Officer | Option exercise | Common Stock | 3,048 | $33.84 | $103K | |
| Michael R. Kenison - Officer | Open-market sale | Common Stock | 3,048 footnote F2 | $50.17 footnote F3 | $153K | |
| Michael R. Kenison - Officer | Option exercise | Employee Stock Option (right to buy) | 3,048 | $0.00 | - | |
| ||||||
| Marc Kermisch - Officer | Grant or award | Common Stock | 3,718 footnote F1 | $0.00 | - | |
| Marc Kermisch - Officer | Grant or award | Employee Stock Option (right to buy) | 6,818 | $0.00 | - | |
| ||||||
| Rainer Gawlick - Director | Open-market purchase | Common Stock | 1,715 | $43.79 | $75K | |
| Suresh Krishna - Officer | Open-market purchase | Common Stock | 1,725 | $43.51 | $75K | |
| Sven Wehrwein - Director | Grant or award | Common Stock | 3,939 | $0.00 | - | |
Item 7.01, 9.01
Item 2.02, 9.01
Item 5.02, 5.07, 9.01
Item 5.02, 7.01, 9.01
Recent PRLB Form 144 notices of proposed sale
3An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| MICHAEL R KENISON | Former Officer | 1,143 | $109K | View on EDGAR | |
| DANIEL SCHUMACHER | Officer | 5,000 |
PRLB insider trading FAQ
What is the latest insider trade for PRLB?
Proto Labs Inc (PRLB) had 2 insider filings in the last 90 days, with the most recent on 2026-09-25. The full record for PRLB runs to 31 Form 4 filings, the earliest from 2025-05-23. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying PRLB stock?
No insider purchases of PRLB were filed in the last 90 days. 2 purchases are on record for this company.
How many insiders are selling PRLB stock?
3 insider sales of PRLB were filed in the last 90 days, totaling $903K.
Where can I see PRLB SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects PRLB Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Materials companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Daniel Schumacher view on EDGAR
- - Daniel Schumacher view on EDGAR
- - Sven Wehrwein view on EDGAR
- - Suresh Krishna view on EDGAR
- - Daniel Schumacher view on EDGAR
- - Bernardo Parlange view on EDGAR
- - Archie C. Black view on EDGAR
- - Sujeet Chand view on EDGAR
- - Moonhie Chin view on EDGAR
Related companies with recent insider activity
Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Materials
- Where PRLB's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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