Proto Labs Inc
Ownership
Ownership Structure
Who owns Proto Labs Inc (PRLB)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 98.8% of the shares are freely tradable; institutional investors hold 94.9%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 16.29 | 3,896,222 | +5.9 | 06/30/2026 |
| Disciplined Growth Investors Inc | 9.95 | 2,380,514 | -4.7 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 6.69 | 1,599,765 | +4.0 | 06/30/2026 |
| Dimensional Fund Advisors, Inc. | 4.82 | 1,152,305 | -9.4 | 06/30/2026 |
| State Street Corp | 4.76 | 1,138,462 | +4.3 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.41 | 1,054,623 | +1.4 | 06/30/2026 |
| American Capital Management Inc | 2.59 | 619,845 | -1.3 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 5.95 | 1,423,954 | +0.0 | 09/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.19 | 763,519 | +0.5 | 09/30/2026 |
| iShares Russell 2000 ETF | 2.62 | 626,561 | -1.1 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Schumacher Daniel | Chief Financial Officer | 35,019 | 2,353,277 $ | Sep 24, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 24, 2026 | Schumacher Daniel | Chief Financial Officer | Sell | 5,000 | 95.32 | 476,605 |
| Sep 17, 2026 | Schumacher Daniel | Chief Financial Officer | Sell | 4,900 | 85.21 | 417,535 |
| Sep 16, 2026 | Schumacher Daniel | Chief Financial Officer | Sell | 100 | 85.00 | 8,500 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 2, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.