Company Analysis

Amentum Holdings, Inc. (AMTM)

NYSE: AMTM · Services-Business Services, NEC · Chantilly, VA · filing with the SEC since 2024
Grade5.5
◀ Past 5.1● Present 5.5▶ Future 5.6
1 est.

Filings

82 filings since 2017 beside 117 insider forms · Large accelerated filer · read from EDGAR on Nov 13, 2026
Due nextLarge accelerated filer
10-K Annual report for the fiscal year ending Oct 2, 2026Large accelerated filers have 60 days after the fiscal year ends. by Dec 1, 2026
10-Q Quarterly report for the quarter ending Jan 31, 2027Large accelerated filers have 40 days after the quarter ends; quarter ends are taken to the month end. by Mar 12, 2027

A deadline is the latest date the SEC's rules allow for its filer category. It is not a forecast of the day the company files. Last time, the results release (8-K item 2.02) came 38 days after the quarter ended. The proxy statement was last filed Dec 19, 2025.

Filings a yearinsider forms included
887635
202420252026

2026 counts to Nov 13, 2026.

Officer or director change (8-K item 5.02): 5 times in the last 36 months, the newest Oct 2, 2026.SEC letters: 13 in the last 36 months, the newest Mar 10, 2025.
Insider forms 117

Insider forms (3, 4, 5 and 144) are counted each year but not listed here; the people and their trades are on the Ownership tab.

FiledFormWhat it is, in plain wordsPeriodAsk
Oct 2, 2026 8-K items 5.02, 9.01 Officer or director change · Current report Sep 28, 2026
Aug 11, 2026 10-Q Quarterly report Jul 3, 2026
Aug 10, 2026 8-K items 2.02, 9.01 Results released · Current report
Aug 6, 2026 SCHEDULE 13G Large holder notice
May 12, 2026 10-Q Quarterly report Apr 3, 2026
May 11, 2026 8-K items 2.02, 9.01 Results released · Current report
May 7, 2026 SCHEDULE 13G/A Large holder update, amended
Apr 28, 2026 8-K item 1.01 Major agreement signed · Current report Apr 24, 2026
Mar 26, 2026 SCHEDULE 13G/A Large holder update, amended
Feb 10, 2026 8-K item 5.07 Shareholder vote · Current report Feb 6, 2026
Feb 10, 2026 10-Q Quarterly report Jan 2, 2026
Feb 9, 2026 8-K items 2.02, 9.01 Results released · Current report
Dec 19, 2025 ARS Annual report to shareholders Oct 3, 2025
Dec 19, 2025 DEFA14A Extra proxy material
Dec 19, 2025 DEF 14A Proxy statement Feb 6, 2026
Nov 25, 2025 10-K Annual report Oct 3, 2025
Nov 24, 2025 8-K items 2.02, 9.01 Results released · Current report
Nov 6, 2025 SCHEDULE 13G/A Large holder update, amended
Oct 1, 2025 S-3ASR Shelf registration
Aug 6, 2025 10-Q Quarterly report Jun 27, 2025
Aug 5, 2025 8-K items 2.02, 9.01 Results released · Current report
May 9, 2025 SCHEDULE 13G/A Large holder update, amended
May 7, 2025 10-Q Quarterly report Mar 28, 2025
May 6, 2025 8-K items 2.02, 9.01 Results released · Current report
Mar 13, 2025 SCHEDULE 13G/A Large holder update, amended
Mar 12, 2025 424B4 Offering prospectus
Mar 11, 2025 EFFECT Registration effective
Mar 10, 2025 CORRESP Reply to the SEC
Mar 10, 2025 CORRESP Reply to the SEC
Mar 10, 2025 S-1 Listing registration
Mar 7, 2025 8-K items 8.01, 9.01 Other event · Current report
Mar 7, 2025 8-K item 9.01 Financial statements and exhibits · Current report
Mar 7, 2025 8-K item 5.07 Shareholder vote · Current report Mar 5, 2025
Feb 7, 2025 SCHEDULE 13G Large holder notice
Feb 5, 2025 SCHEDULE 13G/A Large holder update, amended
Feb 5, 2025 10-Q Quarterly report Dec 27, 2024
Feb 4, 2025 8-K items 2.02, 9.01 Results released · Current report
Jan 30, 2025 8-K items 5.02, 9.01 Officer or director change · Current report Jan 28, 2025
Jan 30, 2025 SCHEDULE 13G/A Large holder update, amended
Jan 24, 2025 UPLOAD SEC comment letter
40 of 82 shown

Every row opens the filing on EDGAR. The plain words are the site's own for each form and each 8-K item; the complete history, insider forms included, is on EDGAR.

SI Assistanton AMTM · research, not advice