Proto Labs, Inc.
Proto Labs, Inc. (PRLB) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · PRLB · as of Mar 31, 2025
Ownership Breakdown
199
Institutional Holders
▼ 10 vs Q4
$765.27M
Total Inst. Value
▼ $71.91M vs Q4
23.79M
Shares Outstanding
freeFloat 98.47%
21.84M
13F Shares Held
▲ 427,934 vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
PRLB largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. fabricated structural metal products | 3.86M | 16.01% | 16.01% | $135.40B | May 2, 2025 | ▼ 146.6K |
VANGUARD GROUP INC fabricated structural metal products | 2.83M | 11.71% | 11.71% | $99.01B | May 9, 2025 | ▼ 37.8K |
DISCIPLINED GROWTH INVESTORS INC /MN fabricated structural metal products | 2.67M | 11.07% | 11.07% | $93.58B | May 15, 2025 | ▲ 497.0K |
DIMENSIONAL FUND ADVISORS LP fabricated structural metal products | 1.32M | 5.49% | 5.49% | $46.42B | May 13, 2025 | ▲ 23.9K |
STATE STREET CORP fabricated structural metal products | 1.12M | 4.64% | 4.64% | $39.28B | May 15, 2025 | ▼ 28.0K |
WELLINGTON MANAGEMENT GROUP LLP fabricated structural metal products | 711.7K | 2.95% | 2.95% | $24.94B | May 13, 2025 | ▲ 351.1K |
FIRST TRUST ADVISORS LP fabricated structural metal products | 624.7K | 2.59% | 2.59% | $21.89B | May 14, 2025 | ▼ 113.9K |
GEODE CAPITAL MANAGEMENT, LLC fabricated structural metal products | 579.3K | 2.40% | 2.40% | $20.30B | May 13, 2025 | ▲ 9.3K |
D. E. SHAW & CO., INC. fabricated structural metal products | 537.4K | 2.23% | 2.23% | $18.83B | May 15, 2025 | ▲ 36.7K |
RENAISSANCE TECHNOLOGIES LLC fabricated structural metal products | 531.7K | 2.20% | 2.20% | $18.63B | May 14, 2025 | ▼ 40.2K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
24
Increased
+1.62M shares2
New Positions
first time holders22
Decreased
−1.05M shares0
Sold Out
fully exitedNet shares change (top 50)
+573.6K
+1.62M / −1.05M
Net new holders
+4
2 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
PRLB insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
15
Buy transactions
17
Sell transactions
0.88
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
WEHRWEIN SVEN director | Jun 2, 2026 | Sale | 1,500 | $76.91 | $115.4K | 33.0K | Form 4 ↗ |
WEHRWEIN SVEN director | Jun 2, 2026 | Sale | 500 | $78.38 | $39.2K | 32.5K | Form 4 ↗ |
Krishna Suresh President and CEO | May 23, 2026 | Tax Withhold | 1,247 | $71.36 | $89.0K | 30.1K | Form 4 ↗ |
Schumacher Daniel Chief Financial Officer | May 20, 2026 | Tax Withhold | 255 | $71.13 | $18.1K | 45.0K | Form 4 ↗ |
Parlange Bernardo Chief Commercial Officer | May 20, 2026 | Award | 3,789 | $71.13 | $269.5K | 3.8K | Form 4 ↗ |
Parlange Bernardo Chief Commercial Officer | May 20, 2026 | Award | 2,109 | — | — | 2.1K | Form 4 ↗ |
Black Archie C. director | May 19, 2026 | Award | 2,210 | — | — | 28.4K | Form 4 ↗ |
Chand Sujeet director | May 19, 2026 | Award | 2,210 | — | — | 26.9K | Form 4 ↗ |
Chin Moonhie director | May 19, 2026 | Award | 2,210 | — | — | 22.3K | Form 4 ↗ |
Gawlick Rainer director | May 19, 2026 | Award | 2,210 | — | — | 46.1K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Proto Labs, Inc. (PRLB) is primarily owned by institutional investors, who hold approximately 91.8% of total shares outstanding. Company insiders own approximately 1.53%, while retail and public investors account for the remaining 6.68%.
The largest institutional shareholder of Proto Labs, Inc. is BLACKROCK, INC., holding approximately 3.86 million shares — equal to 16.01% of outstanding shares — as of March 31, 2025.
A total of 199 institutional investors currently hold PRLB stock, with a combined institutional value of approximately $765,268,191 as of the most recent 13F filing period.
Frequently asked questions
PRLB ownershipProto Labs, Inc. (PRLB) is primarily owned by institutional investors, who hold approximately 91.8% of shares. The largest shareholder is BLACKROCK, INC. with a 16.01% stake. Company insiders hold 1.53%. Data sourced from SEC Form 13F as of March 31, 2025.