LYTIR

Company · PRLB

Proto Labs, Inc.

Name as listed on its exchange; filed with the SEC as Proto Labs Inc.

Nasdaq's symbol directory lists PRLB on the New York Stock Exchange as “Proto Labs, Inc. Common stock”.

In the 12 months to Nov 8, 2026: insiders bought on 2 occasions ($101K); insiders sold on 3 occasions ($903K); 5 planned-sale notices; 1 filing by holders of 5% or more; 1 company report (Form 8-K, since May 26, 2026).

All insider filings at the SEC

Insider purchases and sales, by month (last 12 months)Insider purchases: $101K in total; Insider sales: $903K in total.Sep: Insider sales $903KNov: Insider purchases $101KDecJanFebMarAprMayJunJulAugSepOctNov
Insider purchases above the line: $101KInsider sales below: $903K
Dollar value of open-market purchases and sales reported on SEC Form 4, by the month traded. Sales include pre-arranged 10b5-1 plan sales.

Insider trades · SEC Form 4

Those inside the hall

Open-market purchases and sales only. Legs one person filed for one day are combined.

Who traded

  1. Schumacher Daniel, Chief Financial Officer sold on 3 days all under a 10b5-1 plan latest Sep 24, 2026 sold $903K
  2. Suresh Krishna, President and CEO bought on 1 day latest Nov 2, 2026 bought $52K
  3. Gawlick Rainer bought on 1 day latest Nov 3, 2026 bought $49K
Every trade (5)
  1. BUYGawlick Rainer bought Nov 3, 2026 720 shares filing $49K
  2. BUYSuresh Krishna, President and CEO bought Nov 2, 2026 750 shares filing $52K
  3. SELLSchumacher Daniel, Chief Financial Officer sold Sep 24, 2026 5,000 shares 10b5-1 plan (scheduled) filing $477K
  4. SELLSchumacher Daniel, Chief Financial Officer sold Sep 17, 2026 4,900 shares 10b5-1 plan (scheduled) filing $418K
  5. SELLSchumacher Daniel, Chief Financial Officer sold Sep 16, 2026 100 shares 10b5-1 plan (scheduled) filing $8K

Planned sales · SEC Form 144

Notice given

A Form 144 is filed before an insider sells restricted stock. It states an intent; the sale, if it happens, appears later on a Form 4. Every recent notice

  1. MICHAEL R KENISON filed Sep 25, 2026 Former Officer 1,143 shares planned sale date 09/25/2026 filing $109K
  2. DANIEL SCHUMACHER filed Sep 24, 2026 Officer 5,000 shares planned sale date 09/24/2026 filing $446K
  3. MICHAEL R KENISON filed Sep 24, 2026 Former Officer 1,800 shares planned sale date 09/24/2026 filing $173K
  4. DANIEL SCHUMACHER filed Sep 17, 2026 Officer 4,900 shares planned sale date 09/17/2026 filing $408K
  5. DANIEL SCHUMACHER filed Sep 16, 2026 Officer 100 shares planned sale date 09/16/2026 filing $8K

Large holders · SEC Schedules 13D and 13G

Five percent and over

Anyone who comes to hold more than 5% of a company's voting shares must tell the SEC. A Schedule 13D is filed by a holder who may seek to influence the company; a 13G by one who states it is a passive investor. An amendment updates an earlier filing, and a stake reported as 0% means the holder says it has sold all, or nearly all, of its shares. Every recent 13D and 13G

  1. DISCIPLINED GROWTH INVESTORS INC /MN filed Aug 14, 2026 Schedule 13G/A passive 2,380,514 shares filing 10%

Company reports · SEC Form 8-K

In its own words

Current reports the company filed with the SEC; most items are due within four business days of the event. Each line lists the report's items by the SEC's own titles; the filing says what happened. Reports collected since May 26, 2026; every 8-K at the SEC.

  1. Results of operations and financial condition filing Oct 29, 2026

Sources: SEC EDGAR (Forms 4, 144 and 8-K) and STOCK Act periodic transaction reports. Filings can be late, amended or wrong at the source; see methodology.