FIRST MANHATTAN CO. LLC.

Position in AMTM — Amentum Holdings, Inc.

CIK 728083 NEW YORK, NY

Position in AMTM

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

Position Value

$368,171

-$41,222 QoQ

Shares Held

14,117

0.0% QoQ

Ownership

0.006%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Dec 2024

6 quarters on record

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

Industrials · as of Mar 31, 2026

FIRST MANHATTAN CO. LLC. holds $104,073,289 across 6 Specialty Business Services names. AMTM ranks #4 (0.4% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CPRT	Copart Inc	2,946,130	$97,811,516
2	CBZ	CBIZ, Inc.	160,975	$4,322,178
3	CTAS	Cintas Corp	5,528	$935,005
4	AMTM	Amentum Holdings, Inc. This page	14,117	$368,171
5	RHLD	Resolute Holdings Management, Inc.	2,148	$348,620
6	AZZ	Azz Inc	2,300	$287,799

6 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
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.