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 Sep 30, 2025
Ownership Breakdown
217
Institutional Holders
▲ 11 vs Q2
$1.09B
Total Inst. Value
▲ $220.99M vs Q2
23.79M
Shares Outstanding
freeFloat 98.47%
21.75M
13F Shares Held
▲ 97,153 vs Q2
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
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. fabricated structural metal products | 3.62M | 15.08% | 15.08% | $181.19B | Nov 12, 2025 | ▼ 30.9K |
VANGUARD GROUP INC fabricated structural metal products | 2.74M | 11.43% | 11.43% | $137.33B | Nov 7, 2025 | ▼ 27.9K |
DISCIPLINED GROWTH INVESTORS INC /MN fabricated structural metal products | 2.59M | 10.79% | 10.79% | $129.70B | Nov 14, 2025 | ▼ 129.6K |
DIMENSIONAL FUND ADVISORS LP fabricated structural metal products | 1.31M | 5.44% | 5.44% | $65.36B | Nov 12, 2025 | ▼ 9.6K |
STATE STREET CORP fabricated structural metal products | 1.18M | 4.89% | 4.89% | $58.80B | Nov 14, 2025 | ▼ 11.1K |
RUBRIC CAPITAL MANAGEMENT LP fabricated structural metal products | 1.12M | 4.68% | 4.68% | $56.20B | Nov 14, 2025 | ▲ 89.2K |
GEODE CAPITAL MANAGEMENT, LLC fabricated structural metal products | 567.0K | 2.36% | 2.36% | $28.37B | Nov 12, 2025 | ▲ 4.7K |
RENAISSANCE TECHNOLOGIES LLC fabricated structural metal products | 543.7K | 2.26% | 2.26% | $27.20B | Nov 13, 2025 | ▲ 1.6K |
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP fabricated structural metal products | 460.6K | 1.92% | 1.92% | $23.04B | Nov 13, 2025 | ▲ 13.5K |
D. E. SHAW & CO., INC. fabricated structural metal products | 357.2K | 1.49% | 1.49% | $17.87B | Nov 14, 2025 | ▼ 95.5K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
24
Increased
+960.5K shares2
New Positions
first time holders22
Decreased
−736.1K shares0
Sold Out
fully exitedNet shares change (top 50)
+224.4K
+960.5K / −736.1K
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 91.4% of total shares outstanding. Company insiders own approximately 1.53%, while retail and public investors account for the remaining 7.08%.
The largest institutional shareholder of Proto Labs, Inc. is BLACKROCK, INC., holding approximately 3.62 million shares — equal to 15.08% of outstanding shares — as of September 30, 2025.
A total of 217 institutional investors currently hold PRLB stock, with a combined institutional value of approximately $1.09 billion 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 91.4% of shares. The largest shareholder is BLACKROCK, INC. with a 15.08% stake. Company insiders hold 1.53%. Data sourced from SEC Form 13F as of September 30, 2025.