Proto Labs Inc (PRLB) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

0Shares Outstanding

147,089Shares held by institutions

$8,134,022Value of institutional holdings

88.20%Institutional ownership %

0.20%Shares Changed QoQ

199No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Proto Labs Inc (NYSE:PRLB) is held by 229 institutional investors per 13F filings through December 2025.

These investors collectively held 91.3% of Proto Labs's outstanding shares in December 2025, down from 91.4% in September 2025.
They increased total shares held in Proto Labs by 1.0% from last quarter, and the number of investors in PRLB increased 16.24% annually.
Of these 229 holders, 120 added to their stakes in Proto Labs, 72 trimmed positions, and 37 made no changes.
Altogether, these fund groups held 22.08Mn shares in PRLB by December 2025, up by 219.41K shares quarter on quarter, and down 105.08K shares year over year.
As of December 31, 2025, BlackRock, Inc. held the largest stake in Proto Labs with 3.62Mn shares, accounting for 14.96% of total shares outstanding.
Top purchasers of PRLB stock for the quarter ending December 2025 included DRIEHAUS CAPITAL MANAGEMENT LLC (382.16K), AMERICAN CAPITAL MANAGEMENT INC (352.02K), Auto-Owners Insurance Co (227.66K), Prudential Financial Inc (105.36K), DISCIPLINED GROWTH INVESTORS INC /MN (81.36K).
The largest sales of PRLB for the quarter ending December 2025 came from Polar Asset Management Partners Inc. (173.46K), Bank Of America Corp /De/ (171.39K), D. E. Shaw & Co., Inc. (144.3K), DEUTSCHE BANK AG\ (114.47K), State Street Corp (87.09K).
Business Quant data shows the 10 biggest positions in Proto Labs as of December 2025 are held by BlackRock, Inc. (3.62Mn), DISCIPLINED GROWTH INVESTORS INC /MN (2.67Mn), VANGUARD GROUP INC (2.67Mn), DIMENSIONAL FUND ADVISORS LP (1.28Mn), Rubric Capital Management LP (1.12Mn), State Street Corp (1.09Mn), AMERICAN CAPITAL MANAGEMENT INC (631.31K), GEODE CAPITAL MANAGEMENT, LLC (558.3K), RENAISSANCE TECHNOLOGIES LLC (493.55K), ARROWSTREET CAPITAL, LIMITED PARTNERSHIP (460.62K).

229 Institutional Holders

147,089 Total Shares Held

Rows:

Download Data

Owner Name	Date	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	-2,675	-0.07%	$0.00
DISCIPLINED GROWTH INVESTORS INC /MN	31 Dec, 2025	81,356	3.14%	$0.00
Rubric Capital Management LP	31 Dec, 2025	0	0.00%	$0.00
Barclays Plc	31 Dec, 2025	-38,734	-50.38%	$0.00
VANGUARD GROUP INC	31 Dec, 2025	-78,750	-2.87%	$0.00
Nuveen, LLC	31 Dec, 2025	-4,240	-1.28%	$0.00
HSBC HOLDINGS PLC	31 Dec, 2025	17,877	190.77%	$0.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	-29,806	-2.28%	$0.00
Auto-Owners Insurance Co	31 Dec, 2025	227,655	5,059.00%	$0.00
Rockefeller Capital Management L.P.	31 Dec, 2025	178	58.55%	$0.00
State Street Corp	31 Dec, 2025	-87,094	-7.41%	$0.00
UBS Group AG	31 Dec, 2025	-1,464	-0.83%	$0.00
AMERICAN CAPITAL MANAGEMENT INC	31 Dec, 2025	352,015	126.04%	$0.00
ARK Investment Management LLC	31 Dec, 2025	-15,053	-20.97%	$0.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	-8,736	-1.54%	$0.00
CWA Asset Management Group, LLC	31 Dec, 2025	1,256	3.12%	$0.00
RENAISSANCE TECHNOLOGIES LLC	31 Dec, 2025	-50,100	-9.22%	$0.00
Point72 Asset Management, L.P.	31 Dec, 2025	39,907	0.00%	$0.00
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	31 Dec, 2025	0	0.00%	$0.00
AIMZ Investment Advisors, LLC	31 Dec, 2025	-400	-1.00%	$0.00

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