Portolan Capital Management, LLC

Position in GHM — Graham Corp

CIK 1350290 BOSTON, MA

Position in GHM

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

Position Value

$8,172,639

New position

Shares Held

103,556

first reported quarter

Ownership

0.886%

of shares outstanding

% of Portfolio

0.44%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2026

1 quarter on record

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

Industrials · as of Mar 31, 2026

Portolan Capital Management, LLC holds $28,287,275 across 3 Specialty Industrial Machinery names. GHM ranks #3 (28.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	RRX	Regal Rexnord Corp	53,975	$10,107,358
2	AMSC	American Superconductor Corp /De/	295,636	$10,007,278
3	GHM	Graham Corp This page	103,556	$8,172,639

1 filing row on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$8,172,639	103,556	—	Shares	Sole	2026-05-15
No filing history on record for this holder in this stock.