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

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