RHUMBLINE ADVISERS

Position in MEC — Mayville Engineering Company, Inc.

CIK 1115418 BOSTON, MA

Position in MEC

as of Jun 30, 2026 · filed Aug 12, 2026 Compact

Position Value

$749,237

+$422,547 QoQ

Shares Held

20,001

+9.9% QoQ

Ownership

0.078%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

#90

of 154 holders

Holding Since

Jun 2023

13 quarters on record

Voting authority Sole 15% Shared 0% None 85%

Industrials · as of Jun 30, 2026

RHUMBLINE ADVISERS holds $253,752,982 across 13 Metal Fabrication names. MEC ranks #10 (0.3% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CRS	Carpenter Technology Corp	144,379	$89,058,742
2	ATI	Ati Inc	376,589	$74,225,691
3	MLI	Mueller Industries Inc	613,488	$37,708,039
4	CMC	COMMERCIAL METALS Co	351,762	$22,073,065
5	ESAB	ESAB Corp	148,130	$14,610,061
6	PRLB	Proto Labs Inc	57,970	$4,725,134
7	WOR	Worthington Enterprises, Inc.	85,449	$4,593,738
8	GPGI	GPGI, Inc.	214,549	$3,400,601

13 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$749,237	20,001	+9.9%	Shares	Sole	2026-08-12
2026-03-31	$326,690	18,200	+0.9%	Shares	Sole	2026-05-12
2025-12-31	$337,559	18,032	-10.1%	Shares	Sole	2026-02-13
2025-09-30	$275,929	20,053	+0.4%	Shares	Sole	2025-11-06
2025-06-30	$318,705	19,969	+8.3%	Shares	Sole	2025-08-12
2025-03-31	$247,689	18,443	-3.9%	Shares	Sole	2025-05-29
2024-12-31	$301,588	19,185	+3.3%	Shares	Sole	2025-05-29
2024-09-30	$391,497	18,572	-3.7%	Shares	Sole	2024-11-12
2024-06-30	$321,221	19,281	+49.1%	Shares	Sole	2024-08-01
2024-03-31	$185,329	12,933	-1.3%	Shares	Sole	2024-05-09
2023-12-31	$188,858	13,097	-1.3%	Shares	Sole	2024-02-08
2023-09-30	$145,549	13,268	+4.1%	Shares	Sole	2023-11-09
2023-06-30	$158,865	12,750	—	Shares	Sole	2023-08-08
No filing history on record for this holder in this stock.