THOMPSON SIEGEL & WALMSLEY LLC

Position in AMTM — Amentum Holdings, Inc.

CIK 1008322 RICHMOND, VA

Position in AMTM

as of Mar 31, 2026 · filed May 11, 2026 Compact

Position Value

$39,795,054

-$15,937,407 QoQ

Shares Held

1,525,884

-20.6% QoQ

Ownership

0.625%

of shares outstanding

% of Portfolio

0.76%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Sep 2024

7 quarters on record

Voting authority Sole 96.8167960342988.ToString("F0")% Shared 0.20597896039279526.ToString("F0")% None 2.977225005308398.ToString("F0")%

Industrials · as of Mar 31, 2026

THOMPSON SIEGEL & WALMSLEY LLC holds $103,071,994 across 4 Specialty Business Services names. AMTM ranks #2 (38.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	GPN	Global Payments Inc	810,333	$54,535,410
2	AMTM	Amentum Holdings, Inc. This page	1,525,884	$39,795,054
3	BV	BrightView Holdings, Inc.	634,616	$7,482,122
4	BKSY	BlackSky Technology Inc.	50,056	$1,259,408

7 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$39,795,054	1,525,884	-20.6%	Shares	Defined	2026-05-11
2025-12-31	$55,732,461	1,921,809	-29.6%	Shares	Defined	2026-02-10
2025-09-30	$65,390,637	2,730,298	-2.0%	Shares	Defined	2025-11-12
2025-06-30	$65,799,015	2,786,913	-16.2%	Shares	Defined	2025-08-06
2025-03-31	$60,540,079	3,326,378	+70.7%	Shares	Defined	2025-05-09
2024-12-31	$40,980,824	1,948,684	+469.4%	Shares	Defined	2025-02-10
2024-09-30	$11,037,304	342,242	—	Shares	Defined	2024-11-12
No filing history on record for this holder in this stock.