RHUMBLINE ADVISERS

Position in MEC — Mayville Engineering Company, Inc.

CIK 1115418 BOSTON, MA

Position in MEC

as of Mar 31, 2026 · filed May 12, 2026 Compact

Position Value

$326,690

-$10,869 QoQ

Shares Held

18,200

+0.9% QoQ

Ownership

0.089%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Jun 2023

12 quarters on record

Voting authority Sole 16.906593406593405.ToString("F0")% Shared 0.ToString("F0")% None 83.0934065934066.ToString("F0")%

Industrials · as of Mar 31, 2026

RHUMBLINE ADVISERS holds $175,630,081 across 12 Metal Fabrication names. MEC ranks #11 (0.2% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CRS	Carpenter Technology Corp	140,080	$55,212,532
2	ATI	Ati Inc	354,371	$51,546,805
3	CMC	COMMERCIAL METALS Co	351,694	$21,604,562
4	MLI	Mueller Industries Inc	310,286	$17,189,844
5	ESAB	ESAB Corp	150,549	$14,552,066
6	WOR	Worthington Enterprises, Inc.	95,622	$4,985,731
7	PRLB	Proto Labs Inc	65,114	$3,712,800
8	GPGI	GPGI, Inc.	184,785	$3,159,823

12 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
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.