CenterBook Partners LP

Position in PRLB — Proto Labs Inc

CIK 1872738 GREENWICH, CT

Position in PRLB

as of Jun 30, 2026 · filed Aug 11, 2026 Compact

Position Value

$479,278

New position

Shares Held

5,880

first reported quarter

Ownership

0.025%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

#148

of 277 holders

Holding Since

Jun 2026

1 quarter on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Jun 30, 2026

CenterBook Partners LP holds $4,511,866 across 4 Metal Fabrication names. PRLB ranks #4 (10.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CMC	COMMERCIAL METALS Co	34,744	$2,180,186
2	MEC	Mayville Engineering Company, Inc.	30,992	$1,160,960
3	RYZ	Ryerson Holding Corp	28,096	$691,442
4	PRLB	Proto Labs Inc This page	5,880	$479,278

1 filing row on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$479,278	5,880	—	Shares	Sole	2026-08-11
No filing history on record for this holder in this stock.