How many insider trades does FilingIQ track for PRLB?

FilingIQ tracks 452 Form 4 insider transactions for PRLB (Proto Labs Inc), covering filings from May 20, 2014 onwards. 31 of those were filed in the last 90 days.

Are PRLB insiders net buyers or net sellers?

Across the full Form 4 history for PRLB, 8 transactions (2%) were open-market purchases and 93 (21%) were open-market sales. Compensatory awards and option exercises are filtered out of these counts.

Where does PRLB insider data come from?

Every transaction shown on this page is sourced directly from SEC EDGAR Form 4 filings. FilingIQ parses the raw XML, normalises insider identity across reporting variations, and scores each trade on its multi-factor composite model.

What sector is PRLB in?

Proto Labs Inc (PRLB) is classified in the Industrials sector, specifically Metal Fabrication, with a current market capitalisation of $1.56B.

PRLB insider trading

NYSE Industrials

Proto Labs Inc — scored insider trade history from SEC Form 4 filings, parsed and contextualised by FilingIQ.

Total Form 4 trades

452

Last 90 days

Buys / sells

2% / 21%

Market cap

$1.56B

About Proto Labs Inc

Proto Labs, Inc., together with its subsidiaries, operates as a digital manufacturer of custom parts in the United States and Europe. The company offers injection molding; computer numerical control machining; three-dimensional printing; and sheet metal products. It serves product developers and engineers; procurement and supply chain professionals; and various customers. Proto Labs, Inc. was incorporated in 1999 and is headquartered in Maple Plain, Minnesota.

Company website: www.protolabs.com

PRLB insider activity at a glance

FilingIQ has scored 452 insider transactions for PRLB since May 20, 2014. The most recent filing in our index is dated May 12, 2026.

Across the full history, 8 open-market purchases and 93 open-market sales were filed under transaction codes P and S respectively. Compensatory share awards (code A) and option exercises (code M) are tracked separately and not counted here.

The average FilingIQ composite score on PRLB insider trades is 61.6/100, produced by FilingIQ's multi-factor Form 4 model. Model framework documented at methodology.

View live PRLB trades on FilingIQ Raw filings on SEC EDGAR

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Frequently asked

How many insider trades does FilingIQ track for PRLB?: FilingIQ tracks 452 Form 4 insider transactions for PRLB (Proto Labs Inc), covering filings from May 20, 2014 onwards. 31 of those were filed in the last 90 days.
Are PRLB insiders net buyers or net sellers?: Across the full Form 4 history for PRLB, 8 transactions (2%) were open-market purchases and 93 (21%) were open-market sales. Compensatory awards and option exercises are filtered out of these counts.
Where does PRLB insider data come from?: Every transaction shown on this page is sourced directly from SEC EDGAR Form 4 filings. FilingIQ parses the raw XML, normalises insider identity across reporting variations, and scores each trade on its multi-factor composite model.
What sector is PRLB in?: Proto Labs Inc (PRLB) is classified in the Industrials sector, specifically Metal Fabrication, with a current market capitalisation of $1.56B.

Methodology & sources

Every PRLB insider transaction shown on FilingIQ is parsed directly from a public SEC Form 4 XML filing. Insider identity is normalised across reporting variants (CIK changes, name spellings, related-party indirect holdings). The FilingIQ composite score is documented in full on the team page and algo disclosure. Not investment advice; see disclaimer.