Amentum Holdings, Inc. SEC EDGAR Filings (CIK 0002011286)

SEC EDGAR filings, ownership reports, and insider transactions for Amentum Holdings, Inc..

Symbol
AMTM on NYSE
Industry
Services Business Services, Nec (Office Of Trade & Services)
Business address
4800 Westfields Boulevard, Suite 400, Chantilly, VA, 20151
State of incorporation
DE
Fiscal year end
03 October
Former names
Amazon Holdco Inc. (to 18 Sep 2024)
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Amentum Holdings, Inc. has filed 164 SEC EDGAR filings since 07 Mar 2024

Latest Filings

Recent SEC filings for Amentum Holdings, Inc. including 4/A, 4, ARS and more.

Form type Document Filing Description Filing date Reporting date File number(s)
4/A Open 4/A document View SEC filing for 4/A FORM 4/A 19 Dec 2025 17 Nov 2025
4/A Open 4/A document View SEC filing for 4/A FORM 4/A 19 Dec 2025 17 Nov 2025
4/A Open 4/A document View SEC filing for 4/A FORM 4/A 19 Dec 2025 17 Nov 2025
4 Open 4 document View SEC filing for 4 FORM 4 19 Dec 2025 17 Dec 2025
ARS Open ARS document View SEC filing for ARS ARS 19 Dec 2025 03 Oct 2025 001-42176
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 19 Dec 2025 001-42176
DEF 14A Open DEF 14A document | Open XBRL data View SEC filing for DEF 14A FORM DEF 14A 19 Dec 2025 06 Feb 2026 001-42176
4 Open 4 document View SEC filing for 4 FORM 4 09 Dec 2025 05 Dec 2025
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K FORM 10-K 25 Nov 2025 03 Oct 2025 001-42176
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 24 Nov 2025 24 Nov 2025 001-42176
4 Open 4 document View SEC filing for 4 FORM 4 19 Nov 2025 17 Nov 2025
4 Open 4 document View SEC filing for 4 FORM 4 19 Nov 2025 17 Nov 2025
4 Open 4 document View SEC filing for 4 FORM 4 19 Nov 2025 17 Nov 2025
4 Open 4 document View SEC filing for 4 FORM 4 19 Nov 2025 17 Nov 2025
4 Open 4 document View SEC filing for 4 FORM 4 19 Nov 2025 17 Nov 2025
4 Open 4 document View SEC filing for 4 FORM 4 19 Nov 2025 17 Nov 2025
4 Open 4 document View SEC filing for 4 FORM 4 19 Nov 2025 17 Nov 2025
4 Open 4 document View SEC filing for 4 FORM 4 19 Nov 2025 17 Nov 2025
4 Open 4 document View SEC filing for 4 FORM 4 18 Nov 2025 15 Nov 2025
4 Open 4 document View SEC filing for 4 FORM 4 10 Nov 2025 06 Nov 2025
4 Open 4 document View SEC filing for 4 FORM 4 10 Nov 2025 06 Nov 2025
4 Open 4 document View SEC filing for 4 FORM 4 10 Nov 2025 06 Nov 2025
4 Open 4 document View SEC filing for 4 FORM 4 10 Nov 2025 06 Nov 2025
4 Open 4 document View SEC filing for 4 FORM 4 10 Nov 2025 06 Nov 2025
4 Open 4 document View SEC filing for 4 FORM 4 10 Nov 2025 06 Nov 2025
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 06 Nov 2025 005-94638
S-3ASR Open S-3ASR document | Open XBRL data View SEC filing for S-3ASR S-3ASR 01 Oct 2025 333-290662
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 06 Aug 2025 27 Jun 2025 001-42176
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 05 Aug 2025 05 Aug 2025 001-42176
4 Open 4 document View SEC filing for 4 12 May 2025 08 May 2025
4 Open 4 document View SEC filing for 4 12 May 2025 08 May 2025
4 Open 4 document View SEC filing for 4 12 May 2025 08 May 2025
4 Open 4 document View SEC filing for 4 12 May 2025 08 May 2025
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 09 May 2025 005-94638
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 07 May 2025 28 Mar 2025 001-42176
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 06 May 2025 06 May 2025 001-42176
4 Open 4 document View SEC filing for 4 FORM 4 10 Apr 2025 08 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 10 Apr 2025 08 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 10 Apr 2025 08 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 10 Apr 2025 08 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 10 Apr 2025 08 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 10 Apr 2025 08 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 10 Apr 2025 08 Apr 2025
4 Open 4 document View SEC filing for 4 08 Apr 2025 07 Apr 2025
4 Open 4 document View SEC filing for 4 FORM 4 19 Mar 2025 17 Mar 2025
4 Open 4 document View SEC filing for 4 4 17 Mar 2025 13 Mar 2025
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 13 Mar 2025 005-94638
424B4 Open 424B4 document View SEC filing for 424B4 424B4 12 Mar 2025 333-285663
EFFECT Open EFFECT document View SEC filing for EFFECT 11 Mar 2025 333-285663
CORRESP Open CORRESP document View SEC filing for CORRESP 10 Mar 2025
CORRESP Open CORRESP document View SEC filing for CORRESP 10 Mar 2025
S-1 Open S-1 document View SEC filing for S-1 S-1 10 Mar 2025 333-285663
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 07 Mar 2025 07 Mar 2025 001-42176
4 Open 4 document View SEC filing for 4 FORM 4 07 Mar 2025 05 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Mar 2025 05 Mar 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 07 Mar 2025 07 Mar 2025 001-42176
4 Open 4 document View SEC filing for 4 FORM 4 07 Mar 2025 05 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Mar 2025 05 Mar 2025
4 Open 4 document View SEC filing for 4 FORM 4 07 Mar 2025 05 Mar 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 07 Mar 2025 05 Mar 2025 001-42176
4 Open 4 document View SEC filing for 4 FORM 4 05 Mar 2025 03 Mar 2025
3 Open 3 document View SEC filing for 3 FORM 3 24 Feb 2025 17 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 20 Feb 2025 18 Feb 2025
4 Open 4 document View SEC filing for 4 FORM 4 14 Feb 2025 12 Feb 2025
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 07 Feb 2025 005-94638
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 05 Feb 2025 005-94638
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 05 Feb 2025 27 Dec 2024 001-42176
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 04 Feb 2025 04 Feb 2025 001-42176
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 30 Jan 2025 005-94638
4 Open 4 document View SEC filing for 4 FORM 4 30 Jan 2025 28 Jan 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 30 Jan 2025 28 Jan 2025 001-42176
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 24 Jan 2025 377-07687
DRS Open DRS document View SEC filing for DRS 22 Jan 2025 377-07687
ARS Open ARS document View SEC filing for ARS ARS 21 Jan 2025 27 Sep 2024 001-42176
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 21 Jan 2025 001-42176
DEF 14A Open DEF 14A document | Open XBRL data View SEC filing for DEF 14A DEF 14A 21 Jan 2025 05 Mar 2025 001-42176
3/A Open 3/A document View SEC filing for 3/A 30 Dec 2024 17 Dec 2024
3 Open 3 document View SEC filing for 3 27 Dec 2024 17 Dec 2024
4 Open 4 document View SEC filing for 4 27 Dec 2024 17 Dec 2024
3 Open 3 document View SEC filing for 3 27 Dec 2024 17 Dec 2024
3 Open 3 document View SEC filing for 3 27 Dec 2024 17 Dec 2024
SCHEDULE 13D Open SCHEDULE 13D document View SEC filing for SCHEDULE 13D 23 Dec 2024 005-94638
SCHEDULE 13D Open SCHEDULE 13D document View SEC filing for SCHEDULE 13D 23 Dec 2024 005-94638
4 Open 4 document View SEC filing for 4 FORM 4 23 Dec 2024 20 Dec 2024
4 Open 4 document View SEC filing for 4 19 Dec 2024 17 Dec 2024
SCHEDULE 13D/A Open SCHEDULE 13D/A document View SEC filing for SCHEDULE 13D/A 19 Dec 2024 005-94638
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K FORM 10-K 17 Dec 2024 27 Sep 2024 001-42176
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 16 Dec 2024 16 Dec 2024 001-42176
4 Open 4 document View SEC filing for 4 FORM 4 09 Dec 2024 05 Dec 2024
3 Open 3 document View SEC filing for 3 FORM 3 09 Dec 2024 02 Dec 2024
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 13 Nov 2024 06 Nov 2024 001-42176
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 12 Nov 2024 005-94638
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 12 Nov 2024 005-94638
SC 13G Open SC 13G document View SEC filing for SC 13G 12 Nov 2024 005-94638
4 Open 4 document View SEC filing for 4 FORM 4 08 Nov 2024 06 Nov 2024
4 Open 4 document View SEC filing for 4 FORM 4 08 Nov 2024 06 Nov 2024
4 Open 4 document View SEC filing for 4 FORM 4 08 Nov 2024 06 Nov 2024
4 Open 4 document View SEC filing for 4 FORM 4 08 Nov 2024 06 Nov 2024
4 Open 4 document View SEC filing for 4 FORM 4 08 Nov 2024 06 Nov 2024
4 Open 4 document View SEC filing for 4 FORM 4 08 Nov 2024 06 Nov 2024
4 Open 4 document View SEC filing for 4 FORM 4 08 Nov 2024 06 Nov 2024
4 Open 4 document View SEC filing for 4 FORM 4 08 Nov 2024 06 Nov 2024
4 Open 4 document View SEC filing for 4 FORM 4 08 Nov 2024 06 Nov 2024
S-8 Open S-8 document View SEC filing for S-8 REGISTRATION STATEMENT 08 Nov 2024 333-283095
4 Open 4 document View SEC filing for 4 FORM 4 08 Nov 2024 06 Nov 2024
4 Open 4 document View SEC filing for 4 FORM 4 08 Nov 2024 06 Nov 2024
4 Open 4 document View SEC filing for 4 FORM 4 08 Nov 2024 06 Nov 2024
4 Open 4 document View SEC filing for 4 FORM 4 08 Nov 2024 06 Nov 2024
4 Open 4 document View SEC filing for 4 FORM 4 08 Nov 2024 06 Nov 2024
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 04 Nov 2024 005-94638
SC 13G Open SC 13G document View SEC filing for SC 13G 24 Oct 2024 005-94638
SC 13D Open SC 13D document View SEC filing for SC 13D 04 Oct 2024 005-94638
4 Open 4 document View SEC filing for 4 04 Oct 2024 02 Oct 2024
4 Open 4 document View SEC filing for 4 04 Oct 2024 02 Oct 2024
S-8 Open S-8 document View SEC filing for S-8 REGISTRATION STATEMENT 04 Oct 2024 333-282510
8-K/A Open 8-K/A document | Open XBRL data View SEC filing for 8-K/A AMENDMENT NO. 1 03 Oct 2024 27 Sep 2024 001-42176
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K CURRENT REPORT 03 Oct 2024 27 Sep 2024 001-42176
3 Open 3 document View SEC filing for 3 27 Sep 2024 27 Sep 2024
3 Open 3 document View SEC filing for 3 27 Sep 2024 27 Sep 2024
3 Open 3 document View SEC filing for 3 27 Sep 2024 27 Sep 2024
3 Open 3 document View SEC filing for 3 27 Sep 2024 27 Sep 2024
3 Open 3 document View SEC filing for 3 27 Sep 2024 27 Sep 2024
3 Open 3 document View SEC filing for 3 27 Sep 2024 27 Sep 2024
3 Open 3 document View SEC filing for 3 27 Sep 2024 23 Sep 2024
3 Open 3 document View SEC filing for 3 27 Sep 2024 27 Sep 2024
3 Open 3 document View SEC filing for 3 27 Sep 2024 27 Sep 2024
3 Open 3 document View SEC filing for 3 27 Sep 2024 27 Sep 2024
3 Open 3 document View SEC filing for 3 27 Sep 2024 27 Sep 2024
3 Open 3 document View SEC filing for 3 27 Sep 2024 27 Sep 2024
3 Open 3 document View SEC filing for 3 27 Sep 2024 27 Sep 2024
3 Open 3 document View SEC filing for 3 27 Sep 2024 27 Sep 2024
3 Open 3 document View SEC filing for 3 27 Sep 2024 27 Sep 2024
3 Open 3 document View SEC filing for 3 27 Sep 2024 27 Sep 2024
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 27 Sep 2024 26 Sep 2024 001-42176
3 Open 3 document View SEC filing for 3 FORM 3 27 Sep 2024 27 Sep 2024
3 Open 3 document View SEC filing for 3 FORM 3 27 Sep 2024 27 Sep 2024
4 Open 4 document View SEC filing for 4 4 25 Sep 2024 23 Sep 2024
3 Open 3 document View SEC filing for 3 3 18 Sep 2024 18 Sep 2024
SEC STAFF ACTION Open SEC STAFF ACTION document View SEC filing for SEC STAFF ACTION 18 Sep 2024
3 Open 3 document View SEC filing for 3 3 18 Sep 2024 18 Sep 2024
3 Open 3 document View SEC filing for 3 3 18 Sep 2024 18 Sep 2024
3 Open 3 document View SEC filing for 3 3 18 Sep 2024 18 Sep 2024
3 Open 3 document View SEC filing for 3 3 18 Sep 2024 18 Sep 2024
3 Open 3 document View SEC filing for 3 3 18 Sep 2024 18 Sep 2024
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 18 Sep 2024 18 Sep 2024 001-42176
CERT Open CERT document View SEC filing for CERT NYSE CERTIFICATION 17 Sep 2024 001-42176
CORRESP Open CORRESP document View SEC filing for CORRESP 16 Sep 2024
10-12B/A Open 10-12B/A document View SEC filing for 10-12B/A 10-12B/A 13 Sep 2024 001-42176
CORRESP Open CORRESP document View SEC filing for CORRESP 09 Sep 2024
10-12B/A Open 10-12B/A document View SEC filing for 10-12B/A 10-12B/A 09 Sep 2024 001-42176
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 05 Sep 2024 377-07126
CORRESP Open CORRESP document View SEC filing for CORRESP 26 Aug 2024
10-12B/A Open 10-12B/A document View SEC filing for 10-12B/A 10-12B/A 26 Aug 2024 001-42176
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 21 Aug 2024 377-07126
CORRESP Open CORRESP document View SEC filing for CORRESP 05 Aug 2024
10-12B/A Open 10-12B/A document View SEC filing for 10-12B/A 10-12B/A 05 Aug 2024 001-42176
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 25 Jul 2024 377-07126
CORRESP Open CORRESP document View SEC filing for CORRESP 15 Jul 2024
10-12B Open 10-12B document View SEC filing for 10-12B 10-12B 15 Jul 2024 001-42176
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 04 Jun 2024 377-07126
DRSLTR Open DRSLTR document View SEC filing for DRSLTR 10 May 2024
DRS/A Open DRS/A document View SEC filing for DRS/A 10 May 2024 377-07126
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 04 Apr 2024 377-07126
DRS Open DRS document View SEC filing for DRS 07 Mar 2024 377-07126

About this filer

Amentum Holdings, Inc. files with the SEC under CIK 0002011286. This page aggregates EDGAR filings and related ownership activity.

Industry: Services Business Services, Nec.

See insider transactions for this issuer.

FAQ

What is a CIK?
A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.
Why are some filings missing?
New filings appear as the SEC updates EDGAR, and older records can vary by availability.
How often is this page updated?
Updates follow new EDGAR submissions and periodic data refreshes.

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