AMTM

Amentum Holdings, Inc.

Company with tickers: AMTM

CIK

2011286

CUSIP

023939101

Shares Outstanding

244,316,319

13F Activity (30d)

246 filings 234 filers

Trades by corporate insiders — officers, directors and holders of more than 10% of the shares — disclosed to the SEC on Forms 3, 4 and 5. Form 4 must be filed within two business days of the trade.

Date	Insider	Role	Type	Shares	Price	Value	After
2026-05-06	Bruning Jill L	Chief Technology Officer	Convert	9,072	—	—	9,073
2026-05-06	Mullen Sean Thomas	Chief Growth Officer	Convert	9,072	—	—	35,210
2026-05-06	Bruning Jill L	Chief Technology Officer	Convert	9,072	—	—	200,188
2026-05-06	Arnette Stephen A	Chief Operating Officer	Convert	13,609	—	—	13,609
2026-05-06	Bruning Jill L	Chief Technology Officer	Tax	2,731	$24.89	$67,975	197,457
2026-05-06	Heller John E.	Director, Chief Executive Officer	Convert	18,145	—	—	18,146
2026-05-06	Arnette Stephen A	Chief Operating Officer	Convert	13,609	—	—	109,966
2026-05-06	Heller John E.	Director, Chief Executive Officer	Convert	18,145	—	—	384,203
2026-05-06	Johnson Travis Barton	Chief Financial Officer	Convert	13,609	—	—	13,609
2026-05-06	Arnette Stephen A	Chief Operating Officer	Tax	3,314	$24.89	$82,485	106,652
2026-05-06	Johnson Travis Barton	Chief Financial Officer	Tax	4,097	$24.89	$101,974	118,187
2026-05-06	Mullen Sean Thomas	Chief Growth Officer	Convert	9,072	—	—	9,073
2026-05-06	Heller John E.	Director, Chief Executive Officer	Tax	8,184	$24.89	$203,700	376,019
2026-05-06	Mullen Sean Thomas	Chief Growth Officer	Tax	2,762	$24.89	$68,746	32,448
2026-05-06	Johnson Travis Barton	Chief Financial Officer	Convert	13,609	—	—	122,284
2026-03-04	Bruning Jill L	Chief Technology Officer	Gift	30,000	—	—	190,999
2026-03-02	Arnette Stephen A	Chief Operating Officer	Convert	2,808	—	—	0
2026-03-02	Arnette Stephen A	Chief Operating Officer	Convert	2,808	—	—	97,107
2026-03-02	Arnette Stephen A	Chief Operating Officer	Tax	750	$30.70	$23,025	96,357
2026-02-17	St. Mary Michele T	Chief Legal Officer & GC	Convert	7,080	—	—	29,351
2026-02-17	St. Mary Michele T	Chief Legal Officer & GC	Tax	2,308	$30.05	$69,355	27,043
2026-02-17	St. Mary Michele T	Chief Legal Officer & GC	Convert	7,080	—	—	14,162
2026-02-06	Brooks Vincent K	Director	Award	5,062	—	—	27,462
2026-02-06	EBERHART RALPH E	Director	Award	5,062	—	—	48,120
2026-02-06	Thompson Christopher M.T.	Director	Other	14,000	—	—	14,000
2026-02-06	Loughran Barbara	Director	Award	5,062	—	—	9,662
2026-02-06	Rowland Sandra E.	Director	Award	5,062	—	—	20,073
2026-02-06	Vollmer John C.	Director	Convert	11,564	—	—	0
2026-02-06	EBERHART RALPH E	Director	Convert	11,564	—	—	43,058
2026-02-06	Vollmer John C.	Director	Award	5,062	—	—	429,842
2026-02-06	Vollmer John C.	Director	Convert	11,564	—	—	424,780
2026-02-06	Thompson Christopher M.T.	Director	Other	10,000	—	—	10,000
2026-02-06	Rowland Sandra E.	Director	Convert	11,564	—	—	0
2026-02-06	Brooks Vincent K	Director	Convert	11,564	—	—	22,400
2026-02-06	Brooks Vincent K	Director	Convert	11,564	—	—	0
2026-02-06	IRELAND SUSAN LESLIE	Director	Award	5,062	—	—	8,509
2026-02-06	EBERHART RALPH E	Director	Convert	11,564	—	—	0
2026-02-06	Rowland Sandra E.	Director	Convert	11,564	—	—	15,011
2026-02-06	Thompson Christopher M.T.	Director	Award	5,062	—	—	5,062
2026-01-28	Heller John E.	Director, Chief Executive Officer	Convert	51,979	—	—	103,959
2026-01-28	Heller John E.	Director, Chief Executive Officer	Tax	19,768	$35.71	$705,915	366,058
2026-01-28	Heller John E.	Director, Chief Executive Officer	Convert	51,979	—	—	385,826
2025-12-17	Mullen Sean Thomas	Chief Growth Officer	Tax	4,194	$28.67	$120,242	26,138
2025-12-17	Mullen Sean Thomas	Chief Growth Officer	Convert	9,298	—	—	30,332
2025-12-17	Mullen Sean Thomas	Chief Growth Officer	Convert	9,298	—	—	0
2025-12-05	Burton Darren	Chief People Officer	Tax	1,392	$28.88	$40,201	23,600
2025-12-05	Burton Darren	Chief People Officer	Convert	2,721	—	—	24,992
2025-12-05	Burton Darren	Chief People Officer	Convert	2,721	—	—	5,444
2025-11-17	DEMETRIOU STEVEN J.	Director	Convert	43,396	—	—	0
2025-11-17	Johnson Travis Barton	Chief Financial Officer	Award	100,220	—	—	108,675

Showing 1–50 of 198 transactions