Boston Partners

Position in MEC — Mayville Engineering Company, Inc.

CIK 1386060 BOSTON, MA

Position in MEC

as of Mar 31, 2026 · filed May 11, 2026 Compact

Position Value

$4,175,833

+$6,328 QoQ

Shares Held

232,637

+4.4% QoQ

Ownership

1.14%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Sep 2025

3 quarters on record

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

Industrials · as of Mar 31, 2026

Boston Partners holds $246,707,351 across 3 Metal Fabrication names. MEC ranks #3 (1.7% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CMC	COMMERCIAL METALS Co	3,585,878	$220,280,484
2	ESAB	ESAB Corp	230,199	$22,251,034
3	MEC	Mayville Engineering Company, Inc. This page	232,637	$4,175,833

3 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$4,175,833	232,637	+4.4%	Shares	Defined	2026-05-11
2025-12-31	$4,169,505	222,730	+12.4%	Shares	Defined	2026-02-13
2025-09-30	$2,726,681	198,160	—	Shares	Defined	2025-11-13
No filing history on record for this holder in this stock.