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AMTM · Amentum Holdings, Inc.

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TEAM-0.32% 13F +439META+2.47% 13F +2,694RCG-2.04% CLUSTERUTHR-4.03% 13F +425CRWV-1.12% 13F +693CRM-0.46% 13F +1,018CVNA+2.74% 13F +794TPL-0.71% 13F +444NET-4.47% 13F +710MSTR-1.35% 13F +526DELL+15.81% 13F +1,203CRWD-5.42% 13F +1,382ANET+2.87% 13F +1,323COIN-1.05% 13F +475TEAM-0.32% 13F +439META+2.47% 13F +2,694RCG-2.04% CLUSTERUTHR-4.03% 13F +425CRWV-1.12% 13F +693CRM-0.46% 13F +1,018CVNA+2.74% 13F +794TPL-0.71% 13F +444NET-4.47% 13F +710MSTR-1.35% 13F +526DELL+15.81% 13F +1,203CRWD-5.42% 13F +1,382ANET+2.87% 13F +1,323COIN-1.05% 13F +475

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AMTM

Name: Amentum Holdings, Inc. (AMTM) insider trading and ownership data
Creator: WaveMan
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Amentum Holdings, Inc.

SOFTWARE & IT · SERVICES-BUSINESS SERVICES, NEC · CIK 0002011286

SEC FILINGS☆ WATCH

INSIDER NET · 180D

open-market buys minus sells, Form 4 codes P and S

INSIDER BUYERS · 180D

CONGRESS BUYERS · 1Y

FUNDS ADDED · QTR

213

13F, latest reported quarter

REVENUE GROWTH

+71.6%

XBRL, annual

NET MARGIN

0.5%

CONVERSIONS · 180D

codes C/M, not in net · no price filed

SEVEN FACTS, RANKED AGAINST THE SECTOR · RANK IS NOT A FORECAST

INSIDERS

no Form 4 purchases or sales on file

CONGRESS

no member of Congress has reported trading it

FUNDS

213 funds added or opened last quarter

more than 75% of Software & IT

REVENUE

+71.6% year over year

more than 90% of Software & IT

MARGIN

0.5% net margin

more than 53% of Software & IT

BUYBACKS

no share repurchases reported

SHORT

5.1% of shares outstanding short · 7.1 days to cover · settled 2026-07-31

more than 68% of Software & IT

THE SITUATION · EVERY LINE IS ONE RULE OVER ONE DATASET

213 funds added or opened positions in the latest 13F quarter, of 464 holders.

The year, with the filings on it

Total return indexed to 100 over the last 12 months · every marker is a federal filing, placed at its date — hover any marker for the detail

TOTAL 12M RETURN -19.5%

-19.5%12M

INDEXED RETURN, DIVIDEND-ADJUSTED — NOT A PRICE CHART · LARGE TRADES DRAWN FIRST WHEN A NAME FILES HEAVILY

Live price

Daily candles from TradingView, on their licence — no filings are marked on this one

WHY THIS NAME IS ON THE DESK

The complete filing record, in one place.

The record shows 213 funds added last quarter. Every figure is a federal filing, dated the day it became public.

Backtest this pattern Open the screener

Same sector, ranked by filing activity

Sector from the SEC's own SIC classification

TEAM META CRWV CRM NET CRWD DDOG DASH APP IOT PCTY MDB

Insider transactions

Form 4 purchases and sales (codes P and S) — grants, option exercises and preferred conversions excluded

No insider purchases or sales are on record for Amentum Holdings, Inc. in the period covered. Source: SEC Form 4 filings, as of 2026-09-04.

INSIDER

FILED

VALUE

Loughran Barbara

Director

BUY

2025-02-18

4,600.0

$97.7K

DEMETRIOU STEVEN J.

Executive Chair

BUY

2025-02-12

100,000.0

$2.1M

2 TRANSACTIONS ON RECORD · THIN RECORD, READ IT AS SUCH

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Institutional holders

13F · holdings as of the latest quarter funds have reported

AMERICAN SECURITIES LLC

45,026,743.0 sh

$930.7M

Invesco Ltd.

24,954,251.0 sh

$515.8M

BlackRock, Inc.

17,906,984.0 sh

$370.1M

PRIMECAP MANAGEMENT CO/CA/

12,285,504.0 sh

$253.9M

VANGUARD PORTFOLIO MANAGEMENT LLC

7,948,385.0 sh

$164.3M

SCHEDULE 13D/G

No 5%+ ownership filings

Nobody has crossed 5% with a filing obligation. Absence is a fact here, not missing data.

FORM 144

No planned-sale notices

No insider has notified an intent to sell. This is the panel to watch after a run-up.

Fund concentration

N-PORT · funds ranked by how much of THEMSELVES they put in this stock — the conviction number 13F cannot show

Invesco S&P Spin-Off ETF

$4.7M POSITION · AS OF 2026-04-30

3.1%

Ancora/Thelen Small-Mid Cap Fund

$6.0M POSITION · AS OF 2026-03-31

2.8%

Nuveen Small Cap Value Opportunities Fund

$5.6M POSITION · AS OF 2026-03-31

2.1%

Nuveen Small/Mid Cap Value Fund

$2.3M POSITION · AS OF 2026-03-31

2.1%

Keeley Gabelli SMID Cap Value Fund

$424.7K POSITION · AS OF 2026-03-31

1.8%

Formidable ETF

$351.4K POSITION · AS OF 2026-03-31

1.8%

SEC N-PORT, MONTHLY WITH A ~60-DAY PUBLIC LAG · FUNDS ≥ $10M · % = SHARE OF THE FUND'S OWN BOOK

Corporate PAC

FEC · the company-connected political action committee's own receipts and spending — committee totals only, never individual donors

Amentum Holdings, Inc. Pac (Amentum Pac)

CYCLE 2026 · $179K SPENT

$277.8K

FEDERAL ELECTION COMMISSION · MATCHED BY THE PAC'S CONNECTED ORGANISATION

Executive pay vs shareholder return

DEF 14A pay-versus-performance disclosure · both the headline pay and the SEC's mark-to-market figure, beside the return the company delivered and the return of the peer group it chose itself

CEO TOTAL

ACTUALLY PAID

OTHER NEOs AVG

TSR

PEER TSR

2024

$2.8M

—

TAGGED BY THE COMPANY UNDER SEC ITEM 402(v) · RETURN IS CUMULATIVE FROM THE START OF THE DISCLOSURE PERIOD · THIS FILER REPORTED NO RETURN FIGURES

Fundamentals

Annual figures from XBRL filings · pick a past date to see them exactly as the market knew them then — restatements and all

	2025-10	2024-09	2023-09	2022-09
REVENUE	$14.4B	$8.4B	$7.9B	$7.7B
OPERATING INCOME	$480.0M	$291.0M	$57.0M	$121.0M
NET INCOME	$66.0M	$-82.0M	$-314.0M	$-84.0M
EPS (DILUTED)	0.27	-0.90	-3.49	-0.93
OPERATING CASH FLOW	$543.0M	$47.0M	$67.0M	$126.0M
CASH	$437.0M	$452.0M	$305.0M	—
LONG-TERM DEBT	$3.9B	$4.6B	$4.1B	—

SEC XBRL · FISCAL-YEAR PERIODS · AS KNOWN ON 2026-09-04 · NOBODY ELSE SHOWS FUNDAMENTALS AS OF A PAST DATE