Proto Labs, Inc.
Proto Labs, Inc. (PRLB) Insider Trading
Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.
SEC EDGAR · FMP · PRLB · as of Jun 8, 2026
Activity summary
Buy transactions
2
P-Purchase only
Sell transactions
11
12 Months
Buy/Sell ratio
0.18
Buy/Sell (by trades)
Overall sentiment
Proto Labs, Inc. insiders have been primarily selling shares over the past 12 Months. Selling activity is often driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment toward the company.
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only
As of Jun 8, 2026
PRLB insider buying and selling by quarter
PRLB insider selling · PRLB insider buying stocks · quarterly insider activity
Mobile shows last 4Q · Desktop shows full 8Q
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters
As of Jun 8, 2026
Active insiders
Most active in past 12 months · PRLB ceo insider trading
Showing all insiders · Click a card to filter the transactions table below
▸ Aggregated from reportingName · top 5 by trade count (12M) · no extra API
Recent insider transactions
PRLB executive sell shares · PRLB board member insider trading · PRLB insider trading SEC filing
Scroll horizontally to see all columns
| Date | Insider | Type | Shares | Value | Filing |
|---|---|---|---|---|---|
| Jun 2, 2026 | WEHRWEIN SVEN Director | Sale | 1,500 | $115K | Form 4 |
| Jun 2, 2026 | WEHRWEIN SVEN Director | Sale | 500 | $39K | Form 4 |
| May 23, 2026 | Krishna Suresh President and CEO · Director | Other | 1,247 | $89K | Form 4 |
| May 20, 2026 | Schumacher Daniel CFO | Other | 255 | $18K | Form 4 |
| May 20, 2026 | Parlange Bernardo Chief Commercial Officer | Award | 2,109 | — | Form 4 |
| May 19, 2026 | Black Archie C. Director | Award | 2,210 | — | Form 4 |
| May 19, 2026 | Chand Sujeet Director | Award | 2,210 | — | Form 4 |
| May 19, 2026 | Chin Moonhie Director | Award | 2,210 | — | Form 4 |
| May 19, 2026 | Gawlick Rainer Director | Award | 2,210 | — | Form 4 |
| May 19, 2026 | WEHRWEIN SVEN Director | Award | 2,210 | — | Form 4 |
| May 19, 2026 | KRANTZ DONALD G Director | Award | 2,210 | — | Form 4 |
| May 12, 2026 | Kenison Michael R. Chief Operations Officer | Option | 4,042 | $240K | Form 4 |
| May 11, 2026 | Kenison Michael R. Chief Operations Officer | Option | 3,677 | $123K | Form 4 |
| May 12, 2026 | Kenison Michael R. Chief Operations Officer | Sale | 1,613 | $109K | Form 4 |
| May 11, 2026 | Kenison Michael R. Chief Operations Officer | Option | 3,756 | $127K | Form 4 |
| May 12, 2026 | Kenison Michael R. Chief Operations Officer | Option | 1,557 | $62K | Form 4 |
| May 12, 2026 | Kenison Michael R. Chief Operations Officer | Option | 1,928 | $65K | Form 4 |
| May 12, 2026 | Kenison Michael R. Chief Operations Officer | Sale | 4,198 | $288K | Form 4 |
| May 11, 2026 | Kenison Michael R. Chief Operations Officer | Sale | 7,433 | $522K | Form 4 |
| May 12, 2026 | Kenison Michael R. Chief Operations Officer | Sale | 3,576 | $250K | Form 4 |
| May 12, 2026 | Kenison Michael R. Chief Operations Officer | Sale | 6,643 | $467K | Form 4 |
| May 7, 2026 | Kenison Michael R. Chief Operations Officer | Option | 100 | $3K | Form 4 |
| May 7, 2026 | Kenison Michael R. Chief Operations Officer | Option | 100 | $3K | Form 4 |
| May 7, 2026 | Kenison Michael R. Chief Operations Officer | Sale | 200 | $14K | Form 4 |
| Feb 25, 2026 | Krishna Suresh President and CEO · Director | Award | 13,373 | — | Form 4 |
Krishna Suresh
President and CEO · Director
Date
May 23
Shares
1,247
Price
$71.36
Value
$89K
Parlange Bernardo
Chief Commercial Officer
Date
May 20
Shares
2,109
Price
—
Value
—
Kenison Michael R.
Chief Operations Officer
Date
May 12
Shares
4,042
Price
$59.40
Value
$240K
Kenison Michael R.
Chief Operations Officer
Date
May 11
Shares
3,677
Price
$33.52
Value
$123K
Kenison Michael R.
Chief Operations Officer
Date
May 12
Shares
1,613
Price
$67.58
Value
$109K
Kenison Michael R.
Chief Operations Officer
Date
May 11
Shares
3,756
Price
$33.84
Value
$127K
Kenison Michael R.
Chief Operations Officer
Date
May 12
Shares
1,557
Price
$39.61
Value
$62K
Kenison Michael R.
Chief Operations Officer
Date
May 12
Shares
1,928
Price
$33.84
Value
$65K
Kenison Michael R.
Chief Operations Officer
Date
May 12
Shares
4,198
Price
$68.70
Value
$288K
Kenison Michael R.
Chief Operations Officer
Date
May 11
Shares
7,433
Price
$70.26
Value
$522K
Kenison Michael R.
Chief Operations Officer
Date
May 12
Shares
3,576
Price
$69.78
Value
$250K
Kenison Michael R.
Chief Operations Officer
Date
May 12
Shares
6,643
Price
$70.30
Value
$467K
Kenison Michael R.
Chief Operations Officer
Date
May 7
Shares
100
Price
$33.52
Value
$3K
Kenison Michael R.
Chief Operations Officer
Date
May 7
Shares
100
Price
$33.84
Value
$3K
Kenison Michael R.
Chief Operations Officer
Date
May 7
Shares
200
Price
$70.00
Value
$14K
Krishna Suresh
President and CEO · Director
Date
Feb 25
Shares
13,373
Price
—
Value
—
⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar
▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —
About PRLB insider trading
PRLB insider trades
Proto Labs, Inc. (PRLB) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including Kenison Michael R. (Chief Operations Officer), Schumacher Daniel (CFO), WEHRWEIN SVEN (Director). Over the past 12 months, 5 insiders have filed transactions with the SEC. PRLB insiders have been primarily selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.
For Proto Labs, Inc.'s institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →
Frequently asked questions
PRLB insider trading · 5 questionsThe insiders of Proto Labs, Inc. (PRLB) include executives and directors such as Kenison Michael R. (Chief Operations Officer), Schumacher Daniel (CFO), WEHRWEIN SVEN (Director), among others. Over the past 12 months, 5 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.
▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 8, 2026