CenterBook Partners LP

Position in MEC — Mayville Engineering Company, Inc.

CIK 1872738 GREENWICH, CT

Position in MEC

as of Mar 31, 2026 · filed May 5, 2026 Compact

Position Value

$2,159,438

-$2,628,969 QoQ

Shares Held

120,303

-53.0% QoQ

Ownership

0.587%

of shares outstanding

% of Portfolio

0.12%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2025

5 quarters on record

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

Industrials · as of Mar 31, 2026

CenterBook Partners LP holds $6,812,248 across 4 Metal Fabrication names. MEC ranks #2 (31.7% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	RYZ	Ryerson Holding Corp	147,069	$3,306,111
2	MEC	Mayville Engineering Company, Inc. This page	120,303	$2,159,438
3	CMC	COMMERCIAL METALS Co	12,620	$775,246
4	ESAB	ESAB Corp	5,912	$571,453

5 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$2,159,438	120,303	-53.0%	Shares	Sole	2026-05-05
2025-12-31	$4,788,407	255,791	+44.0%	Shares	Sole	2026-02-11
2025-09-30	$2,444,587	177,659	+86.8%	Shares	Sole	2025-11-07
2025-06-30	$1,517,572	95,086	-3.5%	Shares	Sole	2025-08-12
2025-03-31	$1,323,566	98,553	—	Shares	Sole	2025-05-09
No filing history on record for this holder in this stock.