Amentum Holdings, Inc.

Symbol
AMTM on NYSE
Entity
Company
Industry
Services Business Services, Nec (Office Of Trade & Services)
Business address
4800 Westfields Boulevard, Suite 400, 20151 Chantilly, VA
Phone
7035790410
State of incorporation
DE
Fiscal year end
October 3
Category
Non-accelerated filer
Former names
Amazon Holdco Inc. (to 9/18/2024)
All SEC filings
View on sec.gov
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Amentum Holdings, Inc. has filed 156 SEC EDGAR filings since 3/7/2024

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
10-K Open Document | Data Open Filing FORM 10-K Nov 25, 2025 Oct 3, 2025 001-42176
8-K Open Document | Data Open Filing FORM 8-K Nov 24, 2025 Nov 24, 2025 001-42176
4 Open Document Open Filing FORM 4 Nov 19, 2025 Nov 17, 2025
4 Open Document Open Filing FORM 4 Nov 19, 2025 Nov 17, 2025
4 Open Document Open Filing FORM 4 Nov 19, 2025 Nov 17, 2025
4 Open Document Open Filing FORM 4 Nov 19, 2025 Nov 17, 2025
4 Open Document Open Filing FORM 4 Nov 19, 2025 Nov 17, 2025
4 Open Document Open Filing FORM 4 Nov 19, 2025 Nov 17, 2025
4 Open Document Open Filing FORM 4 Nov 19, 2025 Nov 17, 2025
4 Open Document Open Filing FORM 4 Nov 19, 2025 Nov 17, 2025
4 Open Document Open Filing FORM 4 Nov 18, 2025 Nov 15, 2025
4 Open Document Open Filing FORM 4 Nov 10, 2025 Nov 6, 2025
4 Open Document Open Filing FORM 4 Nov 10, 2025 Nov 6, 2025
4 Open Document Open Filing FORM 4 Nov 10, 2025 Nov 6, 2025
4 Open Document Open Filing FORM 4 Nov 10, 2025 Nov 6, 2025
4 Open Document Open Filing FORM 4 Nov 10, 2025 Nov 6, 2025
4 Open Document Open Filing FORM 4 Nov 10, 2025 Nov 6, 2025
SCHEDULE 13G/A Open Document Open Filing Nov 6, 2025 005-94638
S-3ASR Open Document | Data Open Filing S-3ASR Oct 1, 2025 333-290662
10-Q Open Document | Data Open Filing FORM 10-Q Aug 6, 2025 Jun 27, 2025 001-42176
8-K Open Document | Data Open Filing FORM 8-K Aug 5, 2025 Aug 5, 2025 001-42176
4 Open Document Open Filing May 12, 2025 May 8, 2025
4 Open Document Open Filing May 12, 2025 May 8, 2025
4 Open Document Open Filing May 12, 2025 May 8, 2025
4 Open Document Open Filing May 12, 2025 May 8, 2025
SCHEDULE 13G/A Open Document Open Filing May 9, 2025 005-94638
10-Q Open Document | Data Open Filing FORM 10-Q May 7, 2025 Mar 28, 2025 001-42176
8-K Open Document | Data Open Filing FORM 8-K May 6, 2025 May 6, 2025 001-42176
4 Open Document Open Filing FORM 4 Apr 10, 2025 Apr 8, 2025
4 Open Document Open Filing FORM 4 Apr 10, 2025 Apr 8, 2025
4 Open Document Open Filing FORM 4 Apr 10, 2025 Apr 8, 2025
4 Open Document Open Filing FORM 4 Apr 10, 2025 Apr 8, 2025
4 Open Document Open Filing FORM 4 Apr 10, 2025 Apr 8, 2025
4 Open Document Open Filing FORM 4 Apr 10, 2025 Apr 8, 2025
4 Open Document Open Filing FORM 4 Apr 10, 2025 Apr 8, 2025
4 Open Document Open Filing Apr 8, 2025 Apr 7, 2025
4 Open Document Open Filing FORM 4 Mar 19, 2025 Mar 17, 2025
4 Open Document Open Filing 4 Mar 17, 2025 Mar 13, 2025
SCHEDULE 13G/A Open Document Open Filing Mar 13, 2025 005-94638
424B4 Open Document Open Filing 424B4 Mar 12, 2025 333-285663
EFFECT Open Document Open Filing Mar 11, 2025 333-285663
CORRESP Open Document Open Filing Mar 10, 2025
CORRESP Open Document Open Filing Mar 10, 2025
S-1 Open Document Open Filing S-1 Mar 10, 2025 333-285663
8-K Open Document | Data Open Filing FORM 8-K Mar 7, 2025 Mar 7, 2025 001-42176
4 Open Document Open Filing FORM 4 Mar 7, 2025 Mar 5, 2025
4 Open Document Open Filing FORM 4 Mar 7, 2025 Mar 5, 2025
8-K Open Document | Data Open Filing FORM 8-K Mar 7, 2025 Mar 7, 2025 001-42176
4 Open Document Open Filing FORM 4 Mar 7, 2025 Mar 5, 2025
4 Open Document Open Filing FORM 4 Mar 7, 2025 Mar 5, 2025
4 Open Document Open Filing FORM 4 Mar 7, 2025 Mar 5, 2025
8-K Open Document | Data Open Filing FORM 8-K Mar 7, 2025 Mar 5, 2025 001-42176
4 Open Document Open Filing FORM 4 Mar 5, 2025 Mar 3, 2025
3 Open Document Open Filing FORM 3 Feb 24, 2025 Feb 17, 2025
4 Open Document Open Filing FORM 4 Feb 20, 2025 Feb 18, 2025
4 Open Document Open Filing FORM 4 Feb 14, 2025 Feb 12, 2025
SCHEDULE 13G Open Document Open Filing Feb 7, 2025 005-94638
SCHEDULE 13G/A Open Document Open Filing Feb 5, 2025 005-94638
10-Q Open Document | Data Open Filing FORM 10-Q Feb 5, 2025 Dec 27, 2024 001-42176
8-K Open Document | Data Open Filing FORM 8-K Feb 4, 2025 Feb 4, 2025 001-42176
SCHEDULE 13G/A Open Document Open Filing Jan 30, 2025 005-94638
4 Open Document Open Filing FORM 4 Jan 30, 2025 Jan 28, 2025
8-K Open Document | Data Open Filing FORM 8-K Jan 30, 2025 Jan 28, 2025 001-42176
UPLOAD Open Document Open Filing Jan 24, 2025 377-07687
DRS Open Document Open Filing Jan 22, 2025 377-07687
ARS Open Document Open Filing ARS Jan 21, 2025 Sep 27, 2024 001-42176
DEFA14A Open Document Open Filing DEFA14A Jan 21, 2025 001-42176
DEF 14A Open Document | Data Open Filing DEF 14A Jan 21, 2025 Mar 5, 2025 001-42176
3/A Open Document Open Filing Dec 30, 2024 Dec 17, 2024
3 Open Document Open Filing Dec 27, 2024 Dec 17, 2024
4 Open Document Open Filing Dec 27, 2024 Dec 17, 2024
3 Open Document Open Filing Dec 27, 2024 Dec 17, 2024
3 Open Document Open Filing Dec 27, 2024 Dec 17, 2024
SCHEDULE 13D Open Document Open Filing Dec 23, 2024 005-94638
SCHEDULE 13D Open Document Open Filing Dec 23, 2024 005-94638
4 Open Document Open Filing FORM 4 Dec 23, 2024 Dec 20, 2024
4 Open Document Open Filing Dec 19, 2024 Dec 17, 2024
SCHEDULE 13D/A Open Document Open Filing Dec 19, 2024 005-94638
10-K Open Document | Data Open Filing FORM 10-K Dec 17, 2024 Sep 27, 2024 001-42176
8-K Open Document | Data Open Filing FORM 8-K Dec 16, 2024 Dec 16, 2024 001-42176
4 Open Document Open Filing FORM 4 Dec 9, 2024 Dec 5, 2024
3 Open Document Open Filing FORM 3 Dec 9, 2024 Dec 2, 2024
8-K Open Document | Data Open Filing FORM 8-K Nov 13, 2024 Nov 6, 2024 001-42176
SC 13G Open Document Open Filing SC 13G Nov 12, 2024 005-94638
SC 13G/A Open Document Open Filing Nov 12, 2024 005-94638
SC 13G Open Document Open Filing Nov 12, 2024 005-94638
4 Open Document Open Filing FORM 4 Nov 8, 2024 Nov 6, 2024
4 Open Document Open Filing FORM 4 Nov 8, 2024 Nov 6, 2024
4 Open Document Open Filing FORM 4 Nov 8, 2024 Nov 6, 2024
4 Open Document Open Filing FORM 4 Nov 8, 2024 Nov 6, 2024
4 Open Document Open Filing FORM 4 Nov 8, 2024 Nov 6, 2024
4 Open Document Open Filing FORM 4 Nov 8, 2024 Nov 6, 2024
4 Open Document Open Filing FORM 4 Nov 8, 2024 Nov 6, 2024
4 Open Document Open Filing FORM 4 Nov 8, 2024 Nov 6, 2024
4 Open Document Open Filing FORM 4 Nov 8, 2024 Nov 6, 2024
S-8 Open Document Open Filing REGISTRATION STATEMENT Nov 8, 2024 333-283095
4 Open Document Open Filing FORM 4 Nov 8, 2024 Nov 6, 2024
4 Open Document Open Filing FORM 4 Nov 8, 2024 Nov 6, 2024
4 Open Document Open Filing FORM 4 Nov 8, 2024 Nov 6, 2024
4 Open Document Open Filing FORM 4 Nov 8, 2024 Nov 6, 2024
4 Open Document Open Filing FORM 4 Nov 8, 2024 Nov 6, 2024
SC 13G/A Open Document Open Filing Nov 4, 2024 005-94638
SC 13G Open Document Open Filing Oct 24, 2024 005-94638
SC 13D Open Document Open Filing Oct 4, 2024 005-94638
4 Open Document Open Filing Oct 4, 2024 Oct 2, 2024
4 Open Document Open Filing Oct 4, 2024 Oct 2, 2024
S-8 Open Document Open Filing REGISTRATION STATEMENT Oct 4, 2024 333-282510
8-K/A Open Document | Data Open Filing AMENDMENT NO. 1 Oct 3, 2024 Sep 27, 2024 001-42176
8-K Open Document | Data Open Filing CURRENT REPORT Oct 3, 2024 Sep 27, 2024 001-42176
3 Open Document Open Filing Sep 27, 2024 Sep 27, 2024
3 Open Document Open Filing Sep 27, 2024 Sep 27, 2024
3 Open Document Open Filing Sep 27, 2024 Sep 27, 2024
3 Open Document Open Filing Sep 27, 2024 Sep 27, 2024
3 Open Document Open Filing Sep 27, 2024 Sep 27, 2024
3 Open Document Open Filing Sep 27, 2024 Sep 27, 2024
3 Open Document Open Filing Sep 27, 2024 Sep 23, 2024
3 Open Document Open Filing Sep 27, 2024 Sep 27, 2024
3 Open Document Open Filing Sep 27, 2024 Sep 27, 2024
3 Open Document Open Filing Sep 27, 2024 Sep 27, 2024
3 Open Document Open Filing Sep 27, 2024 Sep 27, 2024
3 Open Document Open Filing Sep 27, 2024 Sep 27, 2024
3 Open Document Open Filing Sep 27, 2024 Sep 27, 2024
3 Open Document Open Filing Sep 27, 2024 Sep 27, 2024
3 Open Document Open Filing Sep 27, 2024 Sep 27, 2024
3 Open Document Open Filing Sep 27, 2024 Sep 27, 2024
8-K Open Document | Data Open Filing 8-K Sep 27, 2024 Sep 26, 2024 001-42176
3 Open Document Open Filing FORM 3 Sep 27, 2024 Sep 27, 2024
3 Open Document Open Filing FORM 3 Sep 27, 2024 Sep 27, 2024
4 Open Document Open Filing 4 Sep 25, 2024 Sep 23, 2024
3 Open Document Open Filing 3 Sep 18, 2024 Sep 18, 2024
SEC STAFF ACTION Open Document Open Filing Sep 18, 2024
3 Open Document Open Filing 3 Sep 18, 2024 Sep 18, 2024
3 Open Document Open Filing 3 Sep 18, 2024 Sep 18, 2024
3 Open Document Open Filing 3 Sep 18, 2024 Sep 18, 2024
3 Open Document Open Filing 3 Sep 18, 2024 Sep 18, 2024
3 Open Document Open Filing 3 Sep 18, 2024 Sep 18, 2024
8-K Open Document | Data Open Filing 8-K Sep 18, 2024 Sep 18, 2024 001-42176
CERT Open Document Open Filing NYSE CERTIFICATION Sep 17, 2024 001-42176
CORRESP Open Document Open Filing Sep 16, 2024
10-12B/A Open Document Open Filing 10-12B/A Sep 13, 2024 001-42176
CORRESP Open Document Open Filing Sep 9, 2024
10-12B/A Open Document Open Filing 10-12B/A Sep 9, 2024 001-42176
UPLOAD Open Document Open Filing Sep 5, 2024 377-07126
CORRESP Open Document Open Filing Aug 26, 2024
10-12B/A Open Document Open Filing 10-12B/A Aug 26, 2024 001-42176
UPLOAD Open Document Open Filing Aug 21, 2024 377-07126
CORRESP Open Document Open Filing Aug 5, 2024
10-12B/A Open Document Open Filing 10-12B/A Aug 5, 2024 001-42176
UPLOAD Open Document Open Filing Jul 25, 2024 377-07126
CORRESP Open Document Open Filing Jul 15, 2024
10-12B Open Document Open Filing 10-12B Jul 15, 2024 001-42176
UPLOAD Open Document Open Filing Jun 4, 2024 377-07126
DRSLTR Open Document Open Filing May 10, 2024
DRS/A Open Document Open Filing May 10, 2024 377-07126
UPLOAD Open Document Open Filing Apr 4, 2024 377-07126
DRS Open Document Open Filing Mar 7, 2024 377-07126