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Buy Day today: Neutral (51) Mixed market breadth · no major macro event
PRLB

Proto Labs Inc

Industrials · Metal Fabrication

87.80$ +1.5% vs. previous close Closing price · As of: Sep 18, 2026

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%.

Institutional ownership ?Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings. 94.9%
Insiders ?Share of the stock held by the executives, founders and major shareholders of the company itself. 1.3%
Float ?Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders. 98.8%
Short % of float ?Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices. 3.5%
Shares Outstanding ?Total number of shares issued. Price times share count gives market cap. 24Mio.

Largest Shareholders

Institutions

Institutions PRLB
Name Stake (%) Shares Change (%) Date
BlackRock Inc 15.37 3,677,875 +1.6 03/31/2026
Disciplined Growth Investors Inc 9.95 2,380,514 -4.7 06/30/2026
Vanguard Portfolio Management, LLC 6.43 1,538,530 +0.0 03/31/2026
Dimensional Fund Advisors, Inc. 4.82 1,152,305 -9.4 06/30/2026
State Street Corp 4.56 1,092,000 +0.3 03/31/2026
Vanguard Capital Management, LLC 4.35 1,039,741 +0.0 03/31/2026
American Capital Management Inc 2.59 619,845 -1.3 06/30/2026

Funds

Funds PRLB
Name Stake (%) Shares Change (%) Date
iShares Core S&P Small-Cap ETF 6.06 1,450,487 +0.0 08/31/2026
Vanguard MStar Total Stk Mkt Idx Invest 3.19 762,010 +0.6 07/31/2026
Disciplined Growth - Mid Cap Growth 2.60 621,648 -7.3 06/30/2026

Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.

Data as of: September 18, 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.

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