AQR CAPITAL MANAGEMENT LLC

Position in PRLB — Proto Labs Inc

CIK 1167557 Greenwich, CT

Position in PRLB

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$3,142,769

+$549,528 QoQ

Shares Held

55,117

+7.5% QoQ

Ownership

0.232%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Sep 2020

23 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Industrials · as of Mar 31, 2026

AQR CAPITAL MANAGEMENT LLC holds $1,142,728,441 across 12 Metal Fabrication names. PRLB ranks #8 (0.3% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	MLI	Mueller Industries Inc	4,877,511	$540,428,215
2	CRS	Carpenter Technology Corp	724,420	$285,530,137
3	ATI	Ati Inc	1,222,580	$177,836,484
4	CMC	COMMERCIAL METALS Co	1,608,477	$98,808,738
5	ESAB	ESAB Corp	233,934	$22,612,057
6	RYZ	Ryerson Holding Corp	266,603	$5,993,232
7	WOR	Worthington Enterprises, Inc.	60,922	$3,176,470
8	PRLB	Proto Labs Inc This page	55,117	$3,142,769

23 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$3,142,769	55,117	+7.5%	Shares	Other	2026-05-15
2025-12-31	$2,593,241	51,260	+61.0%	Shares	Other	2026-02-17
2025-09-30	$1,592,502	31,831	+49.5%	Shares	Other	2025-11-14
2025-06-30	$852,691	21,296	-66.7%	Shares	Other	2025-08-14
2025-03-31	$2,238,037	63,871	+3.3%	Shares	Other	2025-05-15
2024-12-31	$2,416,973	61,831	+21.7%	Shares	Other	2025-02-14
2024-09-30	$1,492,288	50,810	+43.2%	Shares	Defined	2024-11-14
2024-06-30	$1,096,254	35,489	+75.2%	Shares	Defined	2024-08-14
2024-03-31	$724,259	20,259	+62.8%	Shares	Other	2024-05-15
2023-12-31	$484,895	12,446	-75.0%	Shares	Other	2024-02-14
2023-09-30	$1,314,033	49,774	-1.5%	Shares	Defined	2023-11-14
2023-06-30	$1,766,948	50,542	-56.4%	Shares	Defined	2023-08-14
2023-03-31	$3,841,985	115,897	-49.5%	Shares	Defined	2023-05-15
2022-12-31	$5,862,556	229,634	+320.2%	Shares	Defined	2023-02-14
2022-09-30	$1,990,826	54,648	+143.3%	Shares	Defined	2022-11-14
2022-06-30	$1,074,342	22,457	-11.1%	Shares	Defined	2022-08-15
2022-03-31	$1,335,566	25,247	+9.9%	Shares	Defined	2022-05-16
2021-12-31	$1,179,406	22,968	+291.7%	Shares	Defined	2022-02-14
2021-09-30	$390,475	5,863	+118.2%	Shares	Defined	2021-11-15
2021-06-30	$246,666	2,687	-68.8%	Shares	Defined	2021-08-16
2021-03-31	$1,047,293	8,602	+83.7%	Shares	Defined	2021-05-17
2020-12-31	$718,218	4,682	+42.1%	Shares	Defined	2021-02-16
2020-09-30	$426,702	3,295	—	Shares	Defined	2020-11-16
No filing history on record for this holder in this stock.