Portolan Capital Management, LLC

Position in WLDN — Willdan Group, Inc.

CIK 1350290 BOSTON, MA

Position in WLDN

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

Position Value

$7,193,883

+$1,221,720 QoQ

Shares Held

93,964

+63.1% QoQ

Ownership

0.622%

of shares outstanding

% of Portfolio

0.39%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Jun 2025

4 quarters 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 $32,563,921 across 4 Engineering & Construction names. WLDN ranks #2 (22.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	PRIM	Primoris Services Corp	130,626	$18,684,743
2	WLDN	Willdan Group, Inc. This page	93,964	$7,193,883
3	IESC	IES Holdings, Inc.	11,869	$5,655,222
4	ECG	Everus Construction Group, Inc.	8,725	$1,030,073

4 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$7,193,883	93,964	+63.1%	Shares	Sole	2026-05-15
2025-12-31	$5,972,163	57,613	+232.2%	Shares	Sole	2026-02-17
2025-09-30	$1,676,991	17,344	-89.7%	Shares	Sole	2025-11-13
2025-06-30	$10,535,810	168,546	—	Shares	Sole	2025-08-13
No filing history on record for this holder in this stock.