StockCIK 1443669

Proto Labs Inc (PRLB): Insider Trades and Fund Holdings

In the past 12 months, Proto Labs Inc insiders reported 0 open-market purchases worth $0 and 3 sales worth $903K; 3 of the sales were reported as made under a 10b5-1 trading plan.

0Insider buys, 12 months

$0Bought by insiders, 12 months

$903KSold by insiders, 12 months

1Tracked funds holding

Recent insider trades

Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Sep 25, 2026.

Recent PRLB insider trades
Filed	Traded	Insider	Role	Type	Shares	Price ($)	Value	Holding	Filing
Sep 25	Sep 24	Daniel SchumacherCFO	CFO	▼ SELL10b5-1	5,000	95.32	$477K	−13%	Form 4 ↗
Sep 18	Sep 17	Daniel SchumacherCFO	CFO	▼ SELL10b5-1	4,900	85.21	$418K	−11%	Form 4 ↗
Sep 18	Sep 16	Daniel SchumacherCFO	CFO	▼ SELL10b5-1	100	85.00	$9K	−0.2%	Form 4 ↗

Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings

Insiders who traded in the past year

Insider	Role	Buys	Bought	Sells	Sold	Latest
Daniel Schumacher	CFO	0	$0	3	$903K	Sep 25, 2026

Tracked funds that report PRLB

From each fund's latest 13F. Holdings are as of quarter end and are filed up to 45 days later.

Fund	Quarter	Shares	Value	% of portfolio	Change
Renaissance Technologies	Q2 2026	469,251	$38.2M	0.05%	▼ −9.8%
Bridgewater Associates	Q2 2026	0	$0	0.00%	▼ Sold out

Source: SEC Form 13F-HR filings, retrieved Oct 28, 2026. How we read filings

Reading these numbers

Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →