Amentum Holdings

AMTM

Source: the SEC Form 13F filings of the managers we follow, latest for Q3 2026. How we use them

Managers holding

In their latest 13F (Q3 2026)

See who

Value held

$11.1m

Combined value at quarter end

Last quarter

0 bought

1 sold or trimmed

Price at Q2 ’26 end

$20.67

-20.7% in the quarter

Prices here are quarter-end prices implied by the 13F filings. Today’s price on Yahoo Finance

Share price change by quarter

-34.8%Q4 ’24

-13.5%Q1 ’25

+29.7%Q2 ’25

+1.4%Q3 ’25

+21.1%Q4 ’25

-10.1%Q1 ’26

-20.7%Q2 ’26

Change in the quarter-end price implied by managers’ 13F filings, adjusted for stock splits. Excludes dividends.

Managers holding it, by quarter

0Q4 ’23

0Q1 ’24

0Q2 ’24

1Q3 ’24

1Q4 ’24

1Q1 ’25

1Q2 ’25

1Q3 ’25

1Q4 ’25

1Q1 ’26

1Q2 ’26

0Q3 ’26

Counts the managers on this site whose 13F for that quarter includes Amentum Holdings.

Who holds it

Each manager’s latest 13F, sorted by how much of their portfolio it is. Changes are against their previous quarter.

Managers holding Amentum Holdings

Ruane, Cunniff & Goldfarb (Sequoia)	0.2%$11.1m	$11.1m	Trimmed -67%	8 qtrs

Download the holders: CSV · JSON · Markdown

About the company

Sector: Industrials · Services-Business Services, Nec
Incorporated in: Delaware
Financial year ends: 2 October
Shares outstanding: 245m at 7 Aug 2026
SEC filings: Annual reports and other filings on EDGAR

Revenue and profit

$7.7bnSep ’22

$7.9bnSep ’23

$8.4bnSep ’24

$14bnOct ’25

Amentum Holdings revenue and net income by year
Year	Revenue	Net income
Year to Oct 2025	$14bn	$66.0m
Year to Sep 2024	$8.4bn	−$82.0m
Year to Sep 2023	$7.9bn	−$314m
Year to Sep 2022	$7.7bn	−$84.0m

From the company’s XBRL financial statements filed with the SEC, for each financial year. Gaps mean the company didn’t report that figure in a standard form.