Chief Operating Officer · Amentum Holdings, Inc. (AMTM)

Stephen Arnette

A named executive officer of Amentum in every fiscal year CompBrief holds from FY2024 to FY2025. Every figure below is printed as the company filed it and cited to the filing it came from.

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Total disclosed compensation, FY2025

$4,466,260

FY2024: $2,658,972

4th of 5 named executive officers at Amentum by FY2025 total.

5 named officers on file for Amentum, FY2025

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What this number hides

The filing gives the total. Amentum’s full Executive Compensation Report gives every award, the disclosed peer set and what the total leaves out — the pair adds the board’s.

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Compensation figures as of the proxy filed December 19, 2025 (DEF 14A).

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Stephen Arnette compensation by year

Amentum Summary Compensation Table · all 2 fiscal years held
In US dollars, as Amentum reports it. Most recent year shaded. Totals are the company’s disclosed totals.
ComponentFY2024FY2025
Salary$586,154$744,231
Bonus$0$0
Stock awards$1,500,013$2,849,948
Option awards$0$0
Non-equity incentive$511,203$845,644
Pension and deferred compensation$0$0
All other$61,602$26,437
Total$2,658,972$4,466,260

Each year as stated in that year's proxy. A dash means the company reported no figure in that column. Source: Amentum Holdings, Inc. DEF 14A filed December 19, 2025, accession 0001104659-25-123111, and prior-year filings. Open the filing on EDGAR.

How this page was built: the Amentum Holdings, Inc. filed document, accession 0001104659-25-123111. Every figure is read from that document and cited to the page and table it appears in. Filed December 19, 2025.

$2.7M
$4.5M
FY24
FY25
SalaryNon-equity incentiveStock awardsAll other

Equity holdings

unvested awards at FY2024 year-end
TypeUnvested unitsValue at year-endExercise price
RSU17,273$475,956—
RSU10,984$302,663—
RSU10,395$286,433—
RSU10,106$278,470—
RSU4,596$126,642—
RSU4,038$111,267—
RSU3,681$101,430—
PSU1,178$32,460—
RSU521$14,356—

Per the Outstanding Equity Awards at Fiscal Year-End table in Amentum Holdings, Inc.'s FY2024 proxy; value at the fiscal year-end close, as the company printed it.

Amentum’s named executive officers, FY2025

as the company reported each
Named executive officerRoleFY2025 total
John HellerChief Executive Officer$21,197,364
Steven DemetriouExecutive Chairman$5,187,492
Travis JohnsonChief Financial Officer$4,684,175
Stephen Arnette · this pageChief Operating Officer$4,466,260
Sean MullenChief Growth Officer$2,897,902

Stephen Arnette's compensation dossier, Amentum

You have read Stephen Arnette's totals and holdings. The dossier adds each equity grant Amentum disclosed for Stephen Arnette and Amentum's own disclosed peer group, where the company discloses them, with every row in a PDF and a CSV cited to its filing.

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The full Amentum compensation record

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This page is one person within Amentum's record. The company brief lists every named executive, each linking to their own page.

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How this record is built

Every figure on this page is one figure from a public SEC filing, printed as the filing states it and cited to the document. Compensation totals are Amentum's own disclosed totals, not summed by Velarion. Insider transactions are read from Form 4 filings and cover every line filed since the most recent proxy. Nothing is estimated by Velarion; where the company does not disclose a value the cell reads "—", and a section appears only where the company discloses the data. Corrections: records@velarion.ai.

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Stephen Arnette's compensation dossier