Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

Proto Labs Inc

PRLB · NYSE · CIK 0001443669 · Industrials · Metal Fabrication

INSIDER SIGNAL

No active buy signal

0 qualifying P purchase groups
in the current 180-day scoring window

27 Form 4 transaction lines observed in the same window
11 sales · 16 option, withholding, award, gift or other lines

Last qualifying purchase2025-08-05 · Gawlick Rainer · $75.1K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesModerate
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Kenison Michael R.Chief Operations Officer
○▼○▼○▼
Schumacher DanielChief Financial Officer
○▼▼▼
WEHRWEIN SVENDirector
○▼
Krishna SureshPresident and CEO
○
Parlange BernardoChief Commercial Officer
○
KRANTZ DONALD GDirector
○
● Purchase▼ Sale○ Other

Showing the six most active owners; 4 additional owner(s) remain in Form 4 evidence.

Purchase breadth, concentration & cluster buying

These modules activate when qualifying purchases enter the 180-day research window.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2025-08-05 · Gawlick Rainer.

Recent Form 4 activity

0Purchases
15Sales
32Other Form 4 lines
28SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING11 sale line(s) · context only
OTHER16 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
739,819
Previous report
753,948
Avg daily volume
300,784
Days to cover
2.5

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2025-08-05Gawlick RainerPurchase (P)Common Stock1,715USD 43.79USD 75,100SEC filing ↗
2025-08-04Krishna SureshPurchase (P)Common Stock1,725USD 43.51USD 75,055SEC filing ↗
2024-09-06Bodor RobertPurchase (P)Common Stock3,480USD 28.68USD 99,806SEC filing ↗
2021-12-03Bodor RobertPurchase (P)Common Stock3,138USD 47.87USD 150,216SEC filing ↗
2021-12-01Baker Arthur R. IIIPurchase (P)Common Stock10,000USD 49.21USD 492,100SEC filing ↗

Form 4 evidence

47 transaction lines in the latest 365-day window; 224 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-24Schumacher DanielSale (S)Common Stock5,000USD 95.32USD 476,600SEC filing ↗
2026-09-17Schumacher DanielSale (S)Common Stock4,900USD 85.21USD 417,529SEC filing ↗
2026-09-16Schumacher DanielSale (S)Common Stock100USD 85.00USD 8,500SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-24Schumacher DanielSale (S)Common Stock5,000USD 95.32USD 476,600SEC filing ↗
2026-09-17Schumacher DanielSale (S)Common Stock4,900USD 85.21USD 417,529SEC filing ↗
2026-09-16Schumacher DanielSale (S)Common Stock100USD 85.00USD 8,500SEC filing ↗
2026-06-02WEHRWEIN SVENSale (S)Common Stock2,000USD 77.28USD 154,555SEC filing ↗
2026-05-23Krishna SureshTax withholding (F)Common Stock1,247USD 71.36USD 88,986SEC filing ↗
2026-05-20Schumacher DanielTax withholding (F)Common Stock255USD 71.13USD 18,138SEC filing ↗
2026-05-20Parlange BernardoAward / grant (A)Common Stock2,109USD 0.00USD 0SEC filing ↗
2026-05-19WEHRWEIN SVENAward / grant (A)Common Stock2,210USD 0.00USD 0SEC filing ↗
2026-05-19KRANTZ DONALD GAward / grant (A)Common Stock2,210USD 0.00USD 0SEC filing ↗
2026-05-19Gawlick RainerAward / grant (A)Common Stock2,210USD 0.00USD 0SEC filing ↗
2026-05-19Chin MoonhieAward / grant (A)Common Stock2,210USD 0.00USD 0SEC filing ↗
2026-05-19Chand SujeetAward / grant (A)Common Stock2,210USD 0.00USD 0SEC filing ↗
2026-05-19Black Archie C.Award / grant (A)Common Stock2,210USD 0.00USD 0SEC filing ↗
2026-05-12Kenison Michael R.Sale (S)Common Stock16,030USD 69.49USD 1,113,945SEC filing ↗
2026-05-12Kenison Michael R.Option exercise / conversion (M)Common Stock7,527USD 48.76USD 367,011SEC filing ↗
2026-05-11Kenison Michael R.Sale (S)Common Stock7,433USD 70.26USD 522,243SEC filing ↗
2026-05-11Kenison Michael R.Option exercise / conversion (M)Common Stock7,433USD 33.68USD 250,356SEC filing ↗
2026-05-07Kenison Michael R.Sale (S)Common Stock200USD 70.00USD 14,000SEC filing ↗
2026-05-07Kenison Michael R.Option exercise / conversion (M)Common Stock200USD 33.68USD 6,736SEC filing ↗
2026-02-25Schumacher DanielTax withholding (F)Common Stock504USD 62.63USD 31,566SEC filing ↗
2026-02-25Schumacher DanielAward / grant (A)Common Stock3,074USD 0.00USD 0SEC filing ↗
2026-02-25Krishna SureshAward / grant (A)Common Stock13,373USD 0.00USD 0SEC filing ↗
2026-02-25Kermisch MarcAward / grant (A)Common Stock2,795USD 0.00USD 0SEC filing ↗
2026-02-25Kenison Michael R.Tax withholding (F)Common Stock531USD 62.63USD 33,257SEC filing ↗
2026-02-25Kenison Michael R.Award / grant (A)Common Stock2,415USD 0.00USD 0SEC filing ↗
2026-02-17Kenison Michael R.Sale (S)Common Stock5,000USD 66.46USD 332,300SEC filing ↗
2026-02-13Schumacher DanielTax withholding (F)Common Stock1,267USD 67.52USD 85,548SEC filing ↗
2026-02-13Kenison Michael R.Tax withholding (F)Common Stock1,540USD 67.52USD 103,981SEC filing ↗
2026-02-11Schumacher DanielOption exercise / conversion (M)Common Stock3,135USD 33.84USD 106,088SEC filing ↗
2026-02-10Schumacher DanielTax withholding (F)Common Stock6,809USD 53.18USD 362,103SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerPRLB
CIK0001443669
SectorIndustrials
IndustryMetal Fabrication Yahoo Finance
SEC SIC3440 Fabricated Structural Metal Products
ExchangeNYSE

Data coverage

Local Form 4 history224 transaction lines from 2020-02-10 to 2026-09-24
5 P purchase lines · 45 S sale lines · 174 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.