Amentum Holdings, Inc. AMTM NYSE

NYSE • Industrials • Aerospace & Defense • US • USD

SharesGrow Score

41/100

0/7 Pass

SharesGrow Intrinsic Value

Amentum Holdings, Inc. (AMTM) has 20 known insider and institutional holders on record. The largest holder is Lindsay Goldberg Employee Co-Inv. IV L.P. with 45,026,743 shares. Other notable holders include Goldberg 2014 LLC and GOLDBERG ALAN E.

Over the last 12 months, insiders have made 37 transactions in AMTM stock — 12 buys (valued at RSU Award) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.

AMTM Insider Ownership

Top Holder

Lindsay Goldberg Employee Co-Inv. IV L.P.

45,026,743 shares

Buys (12 mo)

$0.00 value

Sells (12 mo)

$0.00 value

12-Month Transaction Activity

Buy 32%

Sell 0%

Top Insider Holders

#	Name	Role	Shares Owned	Last Filed	Relative Size
1	Lindsay Goldberg Employee Co-inv. Iv L.p.	10 Percent Owner	45,026,743	2025-05-12	100%
2	Goldberg 2014 Llc	10 Percent Owner	45,026,743	2025-05-12	100%
3	Goldberg Alan E	10 Percent Owner	45,026,743	2025-05-12	100%
4	Asp Manager Corp.	10 Percent Owner	43,893,904	2024-12-27	97%
5	Asp Amentum Investco Lp	10 Percent Owner	43,893,904	2024-12-30	97%
6	Jacobs Solutions Inc.	10 Percent Owner	29,196,261	2024-09-25	65%
7	Amentum Joint Venture Gp Llc	Director	2,433,022	2025-04-08	5%
8	Demetriou Steven J.	Executive Chair	520,893	2025-02-14	1%
9	Bruning Jill L	Chief Technology Officer	190,999	2026-03-05	0%
10	Johnson Travis Barton	Chief Financial Officer	108,675	2025-11-19	0%
11	Heller John E.	Chief Executive Officer	103,959	2026-01-29	0%
12	Mullen Sean Thomas	Chief Growth Officer	21,034	2025-11-19	0%
13	St. Mary Michele T	Chief Legal Officer & Gc	14,162	2026-02-18	0%
14	Brooks Vincent K	Director	11,564	2025-04-10	0%
15	Eberhart Ralph E	Director	11,564	2025-04-10	0%
16	Vollmer John C.	Director	11,564	2025-04-10	0%
17	Rowland Sandra E.	Director	11,564	2025-04-10	0%
18	Arnette Stephen A	Chief Operating Officer	11,515	2025-11-18	0%
19	Loughran Barbara	Director	9,662	2026-02-10	0%
20	Ireland Susan Leslie	Director	8,509	2026-02-10	0%

Recent Transactions (last 12 months)

Date	Name	Role	Type	Shares	Price	Value
2026-03-04	Bruning Jill L	Chief Technology Officer	Gift (Given)	30,000	-	-
2026-03-02	Arnette Stephen A	Chief Operating Officer	Option Exercise (Sell)	2,808	-	-
2026-02-17	St. Mary Michele T	Chief Legal Officer & Gc	Option Exercise (Sell)	7,080	-	-
2026-02-06	Brooks Vincent K	Director	Option Exercise (Sell)	11,564	-	-
2026-02-06	Loughran Barbara	Director	RSU Award	5,062	-	-
2026-02-06	Vollmer John C.	Director	Option Exercise (Sell)	11,564	-	-
2026-02-06	Ireland Susan Leslie	Director	RSU Award	5,062	-	-
2026-02-06	Rowland Sandra E.	Director	Option Exercise (Sell)	11,564	-	-
2026-02-06	Thompson Christopher M.t.	Director	RSU Award	5,062	-	-
2026-02-06	Eberhart Ralph E	Director	Option Exercise (Sell)	11,564	-	-
2025-11-06	Demetriou Steven J.	Executive Chair	Unknown	-	-	-
2026-01-28	Heller John E.	Chief Executive Officer	Option Exercise (Sell)	51,979	-	-
2025-11-17	Bruning Jill L	Officer	Unknown	-	-	-
2025-12-17	Mullen Sean Thomas	Chief Growth Officer	Option Exercise (Sell)	9,298	-	-
2025-11-17	Arnette Stephen A	Officer	Unknown	-	-	-
2025-11-17	Heller John E.	Chief Executive Officer	Unknown	-	-	-
2025-12-05	Burton Darren	Chief People Officer	Option Exercise (Sell)	2,721	-	-
2025-11-17	St. Mary Michele T	Chief Legal Officer & Gc	RSU Award	22,271	-	-
2025-11-17	Burton Darren	Chief People Officer	RSU Award	22,271	-	-
2025-11-17	Bruning Jill L	Chief Technology Officer	RSU Award	17,817	-	-
2025-11-17	Mullen Sean Thomas	Chief Growth Officer	RSU Award	17,817	-	-
2025-11-17	Arnette Stephen A	Chief Operating Officer	Option Exercise (Sell)	1,178	-	-
2025-11-17	Johnson Travis Barton	Chief Financial Officer	RSU Award	100,220	-	-
2025-11-17	Heller John E.	Chief Executive Officer	RSU Award	155,897	-	-
2025-11-17	Demetriou Steven J.	Executive Chair	Option Exercise (Sell)	43,396	-	-