FIRST MANHATTAN CO. LLC.

Position in AMTM — Amentum Holdings, Inc.

CIK 728083 NEW YORK, NY

Position in AMTM

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$294,382

-$73,789 QoQ

Shares Held

14,242

+0.9% QoQ

Ownership

0.006%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

#239

of 462 holders

Holding Since

Dec 2024

7 quarters on record

Voting authority Sole 0% Shared 100% None 0%

Industrials · as of Jun 30, 2026

FIRST MANHATTAN CO. LLC. holds $38,332,663 across 6 Specialty Business Services names. AMTM ranks #5 (0.8% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CPRT	Copart Inc	1,099,434	$30,993,044
2	CBZ	CBIZ, Inc.	170,975	$5,484,878
3	CTAS	Cintas Corp	5,528	$940,202
4	AZZ	Azz Inc	2,210	$342,660
5	AMTM	Amentum Holdings, Inc. This page	14,242	$294,382
6	RHLD	Resolute Holdings Management, Inc.	1,920	$277,497

7 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$294,382	14,242	+0.9%	Shares	Sole	2026-08-14
2026-03-31	$368,171	14,117	0.0%	Shares	Sole	2026-05-15
2025-12-31	$409,393	14,117	-0.6%	Shares	Sole	2026-02-17
2025-09-30	$340,090	14,200	-8.0%	Shares	Sole	2025-11-14
2025-06-30	$364,420	15,435	-3.6%	Shares	Sole	2025-08-14
2025-03-31	$291,363	16,009	-9.1%	Shares	Sole	2025-05-15
2024-12-31	$370,170	17,602	—	Shares	Sole	2025-02-14
No filing history on record for this holder in this stock.