Proto Labs Inc (PRLB) Stock
2 members of Congress disclosed 2 trades in PRLB since 2015: 0 purchases and 2 sales, most recently Thomas MacArthur (sale, May 27, 2015). 8 of the hedge funds AlphaScala tracks reported PRLB in 13F filings for the quarter ended Sep 30, 2026; the largest reported position is Renaissance Technologies's at $38.25M. Company insiders reported 2 open-market buys and 3 sales on SEC Form 4 in the 90 days to Nov 6, 2026.
Which members of Congress traded Proto Labs Inc (PRLB)?
Most recent: Thomas MacArthur (sale, May 27, 2015); records start Feb 13, 2015.
| Politician | Trade date | Type | Amount |
|---|---|---|---|
| Tom MacArthur R-NJ · House | 2015-05-27 | sale | $1k – $15k |
| Thom Tillis R-NC · Senate | 2015-02-13 | sale | $1k – $15k |
From STOCK Act periodic transaction reports. House filings as of Nov 5, 2026. Senate records here end Oct 21, 2026; later Senate trades are not included.
See all PRLB political trades →Which hedge funds own PRLB?
From 13F filings| Fund | Shares Held | Position Value | Change vs prior Q |
|---|---|---|---|
| Renaissance Technologies Jim Simons (founder) | 469K | $38.25M | -10% |
| D.E. Shaw David Shaw | 211K | $17.23M | -6% |
| Millennium Management Israel Englander | 93K | $7.58M | +260% |
| Citadel Ken Griffin | 89K | $7.22M | +99% |
| Point72 Steve Cohen | 37K | $3.02M | +14% |
| ARK Invest Cathie Wood | 35K | $2.89M | -23% |
| Hussman Investment Trust John Hussman | 27K | $2.59M | -35% |
| Marshall Wace | 17K | $1.38M | -75% |
13F holdings as of Sep 30, 2026
Explore all tracked funds →Are Proto Labs Inc insiders buying or selling?
SEC Form 4 filings| Date | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| Nov 3, 26 | Gawlick Rainer | Director | BUY | 720 | $49K |
| Nov 2, 26 | Krishna Suresh | President and CEO | BUY | 750 | $52K |
| Sep 24, 26 | Schumacher Daniel | Chief Financial Officer | SELL | 5.0K | $477K |
| Sep 17, 26 | Schumacher Daniel | Chief Financial Officer | SELL | 4.9K | $418K |
| Sep 16, 26 | Schumacher Daniel | Chief Financial Officer | SELL | 100 | $9K |
SEC Form 4 filings as of Nov 6, 2026
See cluster-buy signals across all tickers →PRLB price chart
Powered by TradingViewWhat does Proto Labs Inc do?
Proto Labs Inc. is a leading player in the digital manufacturing sector, specializing in rapid prototyping and low-volume production services. The company offers a diverse range of services that include 3D printing, CNC machining, and injection molding, catering primarily to industrial designers, engineers, and product developers. Proto Labs leverages a highly automated, digital platform to accelerate product development cycles, enabling clients to efficiently transition from prototype to market-ready goods. This capability is crucial in industries such as healthcare, automotive, aerospace, and consumer electronics, where reduced time-to-market can be a significant competitive advantage. With its headquarters based in Maple Plain, Minnesota, Proto Labs has positioned itself as a pivotal entity in the manufacturing innovation ecosystem, driving advancements in product design and development processes. The company's commitment to speed and innovation underlines its strategic importance in helping businesses maintain agility and responsiveness in rapidly evolving markets.