Proto Labs Inc

PRLBNYSE

$98.68+0.47 (+0.48% today)

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

Proto Labs Inc price and activity chart data

Showing the 1Y range: Oct 6, 2025 to Oct 5, 2026. Price (+94.9%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
BlackRock, Inc.	16.29%	$318M	0.00%	Not reported
Disciplined Growth Investors Inc	9.95%	$194M	3.29%	Reduce 4.68%
Vanguard Portfolio Management LLC	6.69%	$130M	0.01%	Not reported
Dimensional Fund Advisors LP	4.82%	$93.9M	0.02%	Not reported
State Street Corp	4.76%	$92.8M	0.00%	Not reported
Vanguard Capital Management LLC	4.41%	$86M	0.00%	Not reported
American Capital Management Inc	2.59%	$50.5M	2.27%	Reduce 1.25%
Geode Capital Management, LLC	2.57%	$50.1M	0.00%	Not reported
Renaissance Technologies LLC	1.96%	$38.2M	0.05%	Not reported
Prudential Financial Inc	1.91%	$37.3M	0.04%	Not reported
FMR LLC	1.85%	$36.1M	0.00%	Not reported
Arrowstreet Capital, Limited Partnership	1.84%	$35.9M	0.02%	Not reported
Nuveen, LLC	1.76%	$34.2M	0.01%	Not reported
Goldman Sachs Group Inc	1.69%	$32.9M	0.00%	Not reported
Driehaus Capital Management LLC	1.55%	$30.2M	0.17%	Add 0.27%
Charles Schwab Investment Management Inc	1.48%	$28.9M	0.00%	Not reported
Morgan Stanley	1.32%	$25.7M	0.00%	Not reported
S Squared Technology, LLC	1.20%	$23.5M	7.29%	Reduce 2.70%
Northern Trust Corp	1.19%	$23.2M	0.00%	Not reported
First Trust Advisors LP	0.94%	$18.3M	0.01%	Add 142.05%
JPMorgan Chase & Co	0.94%	$17.9M	0.00%	Not reported
D. E. Shaw & Co., Inc.	0.88%	$17.2M	0.01%	Not reported
Nordea Investment Management AB	0.85%	$16.5M	0.01%	Reduce 4.90%
Hillsdale Investment Management Inc.	0.80%	$15.6M	0.36%	Not reported
Jupiter Asset Management Ltd	0.79%	$15.4M	0.08%	Reduce 3.23%
Panagora Asset Management Inc	0.76%	$14.7M	0.05%	Not reported
Vanguard Fiduciary Trust Co	0.66%	$12.9M	0.00%	Not reported
Bank of New York Mellon Corp	0.60%	$11.7M	0.00%	Not reported
Jane Street Group, LLC	0.60%	$11.7M	0.00%	Not reported
Principal Financial Group Inc	0.56%	$11M	0.01%	Not reported
Bank of America Corp	0.53%	$10.3M	0.00%	Not reported
Gagnon Securities LLC	0.49%	$9.48M	1.83%	Add 4.86%
Rice Hall James & Associates, LLC	0.46%	$8.88M	0.43%	Reduce 4.07%
Rubric Capital Management LP	0.45%	$8.86M	0.08%	Not reported
Invesco Ltd.	0.45%	$8.84M	0.00%	Not reported
Acadian Asset Management LLC	0.41%	$8.08M	0.01%	Not reported
UBS Group AG	0.41%	$7.93M	0.00%	Not reported
Public Sector Pension Investment Board	0.40%	$7.8M	0.02%	Reduce 9.39%
Millennium Management LLC	0.39%	$7.58M	0.00%	Not reported
Citadel Advisors LLC	0.37%	$7.22M	0.00%	Not reported
American Century Companies Inc	0.33%	$6.44M	0.00%	Not reported
Ameriprise Financial Inc	0.29%	$5.69M	0.00%	Not reported
Edgestream Partners, L.P.	0.28%	$5.36M	0.16%	Add 246.04%
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	0.27%	$5.3M	0.00%	Not reported
Informed Momentum Co LLC	0.27%	$5.28M	0.47%	Not reported
Rhumbline Advisers	0.24%	$4.73M	0.00%	Not reported
Legal & General Group Plc	0.24%	$4.62M	0.00%	Not reported
Roubaix Capital, LLC	0.23%	$4.52M	1.62%	New Not reported
AQR Capital Management LLC	0.22%	$4.35M	0.00%	Not reported
Zacks Investment Management	0.22%	$4.32M	0.03%	Add 11.35%

50 of 260 holders

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