Portolan Capital Management, LLC

Position in PRIM — Primoris Services Corp

CIK 1350290 BOSTON, MA

Position in PRIM

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

Position Value

$18,684,743

+$5,561,159 QoQ

Shares Held

130,626

+23.6% QoQ

Ownership

0.241%

of shares outstanding

% of Portfolio

1.02%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Jun 2024

8 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. PRIM ranks #1 (57.4% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	PRIM	Primoris Services Corp This page	130,626	$18,684,743
2	WLDN	Willdan Group, Inc.	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

8 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$18,684,743	130,626	+23.6%	Shares	Sole	2026-05-15
2025-12-31	$13,123,584	105,716	-29.2%	Shares	Sole	2026-02-17
2025-09-30	$20,495,266	149,241	+50.1%	Shares	Sole	2025-11-13
2025-06-30	$7,751,055	99,449	+871.2%	Shares	Sole	2025-08-13
2025-03-31	$587,878	10,240	-90.5%	Shares	Sole	2025-05-15
2024-12-31	$8,193,288	107,242	-34.2%	Shares	Sole	2025-02-13
2024-09-30	$9,472,267	163,090	+28.9%	Shares	Sole	2024-11-14
2024-06-30	$6,313,180	126,542	—	Shares	Sole	2024-08-14
No filing history on record for this holder in this stock.