Proto Labs Inc (PRLB) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

23,932,258Shares Outstanding

1,909,327Shares held by institutions

$127,581,230Value of institutional holdings

90.62%Institutional ownership %

1.07%Shares Changed QoQ

219No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Proto Labs Inc (NYSE:PRLB) currently has 219 active institutional owners and shareholders as of today (December 2025), that have filed 13F forms with the Securities Exchange Commission (SEC).

These investors collectively held 90.6% of the company's total shares outstanding in December 2025, down from 91.4% in September 2025.
The company experienced a 1.07% quarterly change in institutional shares held, alongside an increase of 11.17% in total owners annually.
A review of institutional activity for Proto Labs shows 114 of 219 filers increasing their positions, while 70 reduced their stake, and 35 remained unchanged.
The total number of shares held by institutions in Proto Labs increased to 21.69Mn as of December 2025, a net change of up by 229.55K shares quarter on quarter, and up 309.49K shares year over year.
BlackRock, Inc.'s holding of 3.62Mn shares as of December 31, 2025 makes it the primary institutional investor in Proto Labs, owning 15.12% of the stock.
Among the most significant buyers of Proto Labs during December 2025 were DRIEHAUS CAPITAL MANAGEMENT LLC (382.15K), AMERICAN CAPITAL MANAGEMENT INC (352.01K), PRUDENTIAL FINANCIAL INC (105.36K), DISCIPLINED GROWTH INVESTORS INC /MN (81.36K), JANE STREET GROUP, LLC (51.41K).
Leading sellers of Proto Labs stock in December 2025 included Polar Asset Management Partners Inc. (173.46K), D. E. Shaw & Co., Inc. (144.29K), DEUTSCHE BANK AG\ (114.47K), STATE STREET CORP (87.09K), ALGERT GLOBAL LLC (80.65K).
The top 10 institutional holders of Proto Labs for the quarter ending December 2025 included 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 (558.30K), RENAISSANCE TECHNOLOGIES LLC (493.55K), ARROWSTREET CAPITAL, LIMITED PARTNERSHIP (460.62K).

219 Institutional Holders

1,909,327 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	3,619,004	-2,675	-0.07%	$183,085,413.00
DISCIPLINED GROWTH INVESTORS INC /MN	31 Dec, 2025	2,673,729	81,356	3.14%	$135,263,950.00
VANGUARD GROUP INC	31 Dec, 2025	2,666,227	-78,750	-2.87%	$134,884,424.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	1,276,561	-29,806	-2.28%	$64,583,030.00
Rubric Capital Management LP	31 Dec, 2025	1,123,338	0	0.00%	$56,829,669.00
STATE STREET CORP	31 Dec, 2025	1,088,206	-87,094	-7.41%	$55,052,342.00
AMERICAN CAPITAL MANAGEMENT INC	31 Dec, 2025	631,311	352,015	126.04%	$31,938,023.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	558,300	-8,736	-1.54%	$28,249,952.00
RENAISSANCE TECHNOLOGIES LLC	31 Dec, 2025	493,551	-50,100	-9.22%	$24,968,745.00
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	31 Dec, 2025	460,618	0	0.00%	$23,302,665.00
DRIEHAUS CAPITAL MANAGEMENT LLC	31 Dec, 2025	382,155	382,155	0.00%	$19,333,221.00
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	31 Dec, 2025	363,013	31,585	9.53%	$18,364,828.00
Nuveen, LLC	31 Dec, 2025	325,750	-4,240	-1.28%	$16,479,692.00
S Squared Technology, LLC	31 Dec, 2025	306,103	-5,000	-1.61%	$15,485,751.00
MORGAN STANLEY	31 Dec, 2025	305,612	-385	-0.13%	$15,461,002.00
NORTHERN TRUST CORP	31 Dec, 2025	256,268	-22,473	-8.06%	$12,964,598.00
NORDEA INVESTMENT MANAGEMENT AB	31 Dec, 2025	224,439	-32,816	-12.76%	$11,504,744.00
D. E. Shaw & Co., Inc.	31 Dec, 2025	212,868	-144,295	-40.40%	$10,768,992.00
JUPITER ASSET MANAGEMENT LTD	31 Dec, 2025	194,832	0	0.00%	$9,856,551.00
PRUDENTIAL FINANCIAL INC	31 Dec, 2025	182,826	105,357	136.00%	$9,249,167.00

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