MILLENNIUM MANAGEMENT LLC

Position in MEC — Mayville Engineering Company, Inc.

CIK 1273087 NEW YORK, NY

Position in MEC

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

Position Value

$6,838,447

+$3,970,543 QoQ

Shares Held

380,972

+148.7% QoQ

Ownership

1.86%

of shares outstanding

% of Portfolio

0.01%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Dec 2021

13 quarters on record

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

Industrials · as of Mar 31, 2026

MILLENNIUM MANAGEMENT LLC holds $237,371,310 across 12 Metal Fabrication names. MEC ranks #6 (2.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ATI	Ati Inc	619,240	$90,074,650
2	ESAB	ESAB Corp	902,851	$87,269,577
3	MLI	Mueller Industries Inc	363,559	$20,141,168
4	CMC	COMMERCIAL METALS Co	175,798	$10,799,271
5	CRS	Carpenter Technology Corp	21,116	$8,322,871
6	MEC	Mayville Engineering Company, Inc. This page	380,972	$6,838,447
7	RYZ	Ryerson Holding Corp	184,202	$4,140,860
8	WOR	Worthington Enterprises, Inc.	54,590	$2,846,322

13 filing rows on record

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