MILLENNIUM MANAGEMENT LLC

Position in MEC — Mayville Engineering Company, Inc.

CIK 1273087 NEW YORK, NY

Position in MEC

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$9,502,740

+$2,664,293 QoQ

Shares Held

253,677

-33.4% QoQ

Ownership

0.995%

of shares outstanding

% of Portfolio

0.01%

of 13F equity value

Holder Rank

#26

of 154 holders

Holding Since

Dec 2021

14 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Jun 30, 2026

MILLENNIUM MANAGEMENT LLC holds $304,673,179 across 10 Metal Fabrication names. MEC ranks #5 (3.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ATI	Ati Inc	875,260	$172,513,746
2	CRS	Carpenter Technology Corp	122,091	$75,310,612
3	WOR	Worthington Enterprises, Inc.	278,294	$14,961,085
4	MLI	Mueller Industries Inc	157,812	$9,699,914
5	MEC	Mayville Engineering Company, Inc. This page	253,677	$9,502,740
6	CMC	COMMERCIAL METALS Co	145,290	$9,116,947
7	PRLB	Proto Labs Inc	92,960	$7,577,169
8	IIIN	Insteel Industries Inc	141,487	$4,272,907

14 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$9,502,740	253,677	-33.4%	Shares	Sole	2026-08-14
2026-03-31	$6,838,447	380,972	+148.7%	Shares	Sole	2026-05-15
2025-12-31	$2,867,904	153,200	+36.4%	Shares	Sole	2026-02-17
2025-03-31	$1,508,860	112,350	+270.3%	Shares	Sole	2025-05-15
2024-12-31	$477,007	30,344	+114.1%	Shares	Sole	2025-02-14
2023-12-31	$204,345	14,171	-7.7%	Shares	Sole	2024-02-14
2023-09-30	$168,356	15,347	+4.9%	Shares	Sole	2023-11-14
2023-06-30	$182,314	14,632	-86.8%	Shares	Sole	2023-08-14
2023-03-31	$1,656,179	111,004	+27.4%	Shares	Sole	2023-05-15
2022-12-31	$1,102,989	87,124	-55.0%	Shares	Sole	2023-02-14
2022-09-30	$1,260,257	193,588	-14.7%	Shares	Sole	2022-11-14
2022-06-30	$1,755,749	226,841	+365.2%	Shares	Sole	2022-08-15
2022-03-31	$456,853	48,757	+138.7%	Shares	Sole	2022-05-16
2021-12-31	$304,581	20,428	—	Shares	Sole	2022-02-14
No filing history on record for this holder in this stock.