Proto Labs
PRLB · NYSE
$87.73+$0.33 (+0.38%)TodayMarket closed ·
Prev close $87.40
Who owns PRLB
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 54.2% of PRLB’s shares.
- BlackRock Institutional Trust Company, N.A.14.4%
- Disciplined Growth Investors, Inc.10.0%
- Vanguard Portfolio Management, LLC6.7%
- Dimensional Fund Advisors, L.P.4.8%
- Next 6 largest institutions18.2%
- All other shareholders45.8%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 3.43M | 14.43% |
| Disciplined Growth Investors, Inc. | 2.38M | 10.01% |
| Vanguard Portfolio Management, LLC | 1.60M | 6.72% |
| Dimensional Fund Advisors, L.P. | 1.15M | 4.84% |
| State Street Investment Management (US) | 1.14M | 4.79% |
| Vanguard Capital Management, LLC | 1.05M | 4.43% |
| American Capital Management, Inc. | 619.85K | 2.61% |
| Geode Capital Management, L.L.C. | 614.03K | 2.58% |
| Renaissance Technologies LLC | 469.25K | 1.97% |
| Fidelity Management & Research Company LLC | 442.66K | 1.86% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Core S&P Small-Cap ETF | 1.45M | 6.09% |
| Vanguard Total Stock Market Index Fund | 762.01K | 3.20% |
| iShares Russell 2000 ETF | 626.68K | 2.63% |
| Vanguard Small-Cap Index Fund | 547.03K | 2.30% |
| Vanguard Small-Cap Value Index Fund | 347.41K | 1.46% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $2.71M (11 trades) of PRLB on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Schumacher Daniel | Sale | 5.00K | $476.60K |
| Schumacher Daniel | Sale | 4.90K | $417.54K |
| Schumacher Daniel | Sale | 100 | $8.50K |
| WEHRWEIN SVEN | Sale | 500 | $39.19K |
| WEHRWEIN SVEN | Sale | 1.50K | $115.36K |
| Krishna Suresh | Tax withholding | 1.25K | $88.99K |
| Schumacher Daniel | Tax withholding | 255 | $18.14K |
| Parlange Bernardo | Award | 3.79K | — |
| Parlange Bernardo | Award | 2.11K | — |
| Black Archie C. | Award | 2.21K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 739.82K
- Days to cover
- 2.46
- % of shares outstanding
- 3.11%
- Average daily volume
- 300.78K
- Change since last report
- −1.9%
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