AMTM · Amentum Holdings, Inc.

$22.55 +0.54 (+2.45%) At close · Jul 24

Market Cap

$5.51B

244.32M

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	Security	Shares	Price	Value	After
2026-05-06	Bruning Jill L	Chief Technology Officer	Convert↓ Filing footnotes — Restricted Stock Units (Direct) Each restricted stock unit represents a contingent right to receive one share of AMTM common stock. One-half of the restricted stock units shall vest and be delivered on the 18th month and three-year anniversaries of the date of grant.	Restricted Stock Units	9,072	—	—	9,073
2026-05-06	Mullen Sean Thomas	Chief Growth Officer	Convert↑ Filing footnotes — Common Stock (Direct) Represents distribution of AMTM common stock upon vesting of restricted stock units.	Common Stock	9,072	—	—	35,210
2026-05-06	Bruning Jill L	Chief Technology Officer	Convert↑ Filing footnotes — Common Stock (Direct) Represents distribution of AMTM common stock upon vesting of restricted stock units. Includes 117 shares acquired under the employee stock purchase plan in March 2026.	Common Stock	9,072	—	—	200,188
2026-05-06	Arnette Stephen A	Chief Operating Officer	Convert↓ Filing footnotes — Restricted Stock Units (Direct) Each restricted stock unit represents a contingent right to receive one share of AMTM common stock. One-half of the restricted stock units shall vest and be delivered on the 18th month and three-year anniversaries of the date of grant.	Restricted Stock Units	13,609	—	—	13,609
2026-05-06	Bruning Jill L	Chief Technology Officer	Tax↓ Filing footnotes — Common Stock (Direct) Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.	Common Stock	2,731	$24.89	$67,975	197,457
2026-05-06	Heller John E.	Director, Chief Executive Officer	Convert↓ Filing footnotes — Restricted Stock Units (Direct) Each restricted stock unit represents a contingent right to receive one share of AMTM common stock. One-half of the restricted stock units shall vest and be delivered on the 18th month and three-year anniversaries of the date of grant.	Restricted Stock Units	18,145	—	—	18,146
2026-05-06	Arnette Stephen A	Chief Operating Officer	Convert↑ Filing footnotes — Common Stock (Direct) Represents distribution of AMTM common stock upon vesting of restricted stock units.	Common Stock	13,609	—	—	109,966
2026-05-06	Heller John E.	Director, Chief Executive Officer	Convert↑ Filing footnotes — Common Stock (Direct) Represents distribution of AMTM common stock upon vesting of restricted stock units.	Common Stock	18,145	—	—	384,203
2026-05-06	Johnson Travis Barton	Chief Financial Officer	Convert↓ Filing footnotes — Restricted Stock Units (Direct) Each restricted stock unit represents a contingent right to receive one share of AMTM common stock. One-half of the restricted stock units shall vest and be delivered on the 18th month and three-year anniversaries of the date of grant.	Restricted Stock Units	13,609	—	—	13,609
2026-05-06	Arnette Stephen A	Chief Operating Officer	Tax↓ Filing footnotes — Common Stock (Direct) Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.	Common Stock	3,314	$24.89	$82,485	106,652
2026-05-06	Johnson Travis Barton	Chief Financial Officer	Tax↓ Filing footnotes — Common Stock (Direct) Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.	Common Stock	4,097	$24.89	$101,974	118,187
2026-05-06	Mullen Sean Thomas	Chief Growth Officer	Convert↓ Filing footnotes — Restricted Stock Units (Direct) Each restricted stock unit represents a contingent right to receive one share of AMTM common stock. One-half of the restricted stock units shall vest and be delivered on the 18th month and three-year anniversaries of the date of grant.	Restricted Stock Units	9,072	—	—	9,073
2026-05-06	Heller John E.	Director, Chief Executive Officer	Tax↓ Filing footnotes — Common Stock (Direct) Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.	Common Stock	8,184	$24.89	$203,700	376,019
2026-05-06	Mullen Sean Thomas	Chief Growth Officer	Tax↓ Filing footnotes — Common Stock (Direct) Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock.	Common Stock	2,762	$24.89	$68,746	32,448
2026-05-06	Johnson Travis Barton	Chief Financial Officer	Convert↑ Filing footnotes — Common Stock (Direct) Represents a distribution of AMTM common stock upon vesting of restricted stock units.	Common Stock	13,609	—	—	122,284
2026-03-04	Bruning Jill L	Chief Technology Officer	Gift↓	Common Stock	30,000	—	—	190,999
2026-03-02	Arnette Stephen A	Chief Operating Officer	Convert↓ Filing footnotes — Restricted Stock Units (Direct) Each restricted stock unit represents a contingent right to receive one share of AMTM common stock. The restricted stock units awarded vested on March 2, 2026.	Restricted Stock Units	2,808	—	—	0
2026-03-02	Arnette Stephen A	Chief Operating Officer	Convert↑ Filing footnotes — Common Stock (Direct) Represents distribution of AMTM common stock upon vesting of restricted stock units.	Common Stock	2,808	—	—	97,107
2026-03-02	Arnette Stephen A	Chief Operating Officer	Tax↓ Filing footnotes — Common Stock (Direct) Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.	Common Stock	750	$30.70	$23,025	96,357
2026-02-17	St. Mary Michele T	Chief Legal Officer & GC	Convert↑ Filing footnotes — Common Stock (Direct) Represents distribution of AMTM common stock upon vesting of restricted stock units.	Common Stock	7,080	—	—	29,351
2026-02-17	St. Mary Michele T	Chief Legal Officer & GC	Tax↓ Filing footnotes — Common Stock (Direct) Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.	Common Stock	2,308	$30.05	$69,355	27,043
2026-02-17	St. Mary Michele T	Chief Legal Officer & GC	Convert↓ Filing footnotes — Restricted Stock Units (Direct) Each restricted stock unit represents a contingent right to receive one share of AMTM common stock. Represents distribution of AMTM common stock upon vesting of restricted stock units. The restricted stock units awarded vested on February 17, 2026.	Restricted Stock Units	7,080	—	—	14,162
2026-02-06	Brooks Vincent K	Director	Award↑ Filing footnotes — Common Stock (Direct) The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.	Common Stock	5,062	—	—	27,462
2026-02-06	EBERHART RALPH E	Director	Award↑ Filing footnotes — Common Stock (Direct) The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.	Common Stock	5,062	—	—	48,120
2026-02-06	Loughran Barbara	Director	Award↑ Filing footnotes — Common Stock (Direct) The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.	Common Stock	5,062	—	—	9,662
2026-02-06	Rowland Sandra E.	Director	Award↑ Filing footnotes — Common Stock (Direct) The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.	Common Stock	5,062	—	—	20,073
2026-02-06	Vollmer John C.	Director	Convert↓ Filing footnotes — Restricted Stock Units (Direct) Each restricted stock unit represents a contingent right to receive one share of AMTM common stock. The restricted stock units awarded vested on February 6, 2026.	Restricted Stock Units	11,564	—	—	0
2026-02-06	EBERHART RALPH E	Director	Convert↑ Filing footnotes — Common Stock (Direct) Represents distribution of AMTM common stock upon vesting of restricted stock units. Reflects a non-reportable transaction for shares transferred from the pro-rata distribution in-kind by Jacobs Solutions Inc. to its shareholders for no consideration on May 30, 2025.	Common Stock	11,564	—	—	43,058
2026-02-06	Vollmer John C.	Director	Award↑ Filing footnotes — Common Stock (Direct) The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.	Common Stock	5,062	—	—	429,842
2026-02-06	Vollmer John C.	Director	Convert↑ Filing footnotes — Common Stock (Direct) Represents distribution of AMTM common stock upon vesting of restricted stock units. Reflects a non-reportable transaction for shares transferred from the pro-rata distribution in-kind by Amentum Joint Venture LP to its partners for no consideration at the time of the transaction.	Common Stock	11,564	—	—	424,780
2026-02-06	Rowland Sandra E.	Director	Convert↓ Filing footnotes — Restricted Stock Units (Direct) Each restricted stock unit represents a contingent right to receive one share of AMTM common stock. The restricted stock units awarded vested on February 6, 2026.	Restricted Stock Units	11,564	—	—	0
2026-02-06	Brooks Vincent K	Director	Convert↑ Filing footnotes — Common Stock (Direct) Represents distribution of AMTM common stock upon vesting of restricted stock units. Reflects a non-reportable transaction for shares transferred from the pro-rata distribution in-kind by Jacobs Solutions Inc. to its shareholders for no consideration on May 30, 2025.	Common Stock	11,564	—	—	22,400
2026-02-06	Brooks Vincent K	Director	Convert↓ Filing footnotes — Restricted Stock Units (Direct) Each restricted stock unit represents a contingent right to receive one share of AMTM common stock. The restricted stock units awarded vested on February 6, 2026.	Restricted Stock Units	11,564	—	—	0
2026-02-06	IRELAND SUSAN LESLIE	Director	Award↑ Filing footnotes — Common Stock (Direct) The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.	Common Stock	5,062	—	—	8,509
2026-02-06	EBERHART RALPH E	Director	Convert↓ Filing footnotes — Restricted Stock Units (Direct) Each restricted stock unit represents a contingent right to receive one share of AMTM common stock. The restricted stock units awarded vested on February 6, 2026.	Restricted Stock Units	11,564	—	—	0
2026-02-06	Rowland Sandra E.	Director	Convert↑ Filing footnotes — Common Stock (Direct) Represents distribution of AMTM common stock upon vesting of restricted stock units.	Common Stock	11,564	—	—	15,011
2026-02-06	Thompson Christopher M.T.	Director	Award↑ Filing footnotes — Common Stock (Direct) The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.	Common Stock	5,062	—	—	5,062
2026-01-28	Heller John E.	Director, Chief Executive Officer	Convert↓ Filing footnotes — Restricted Stock Units (Direct) Each restricted stock unit represents a contingent right to receive one share of AMTM common stock. Represents distribution of AMTM common stock upon vesting of restricted stock units. The restricted stock units awarded vested on January 28, 2026.	Restricted Stock Units	51,979	—	—	103,959
2026-01-28	Heller John E.	Director, Chief Executive Officer	Tax↓ Filing footnotes — Common Stock (Direct) Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.	Common Stock	19,768	$35.71	$705,915	366,058
2026-01-28	Heller John E.	Director, Chief Executive Officer	Convert↑ Filing footnotes — Common Stock (Direct) Represents distribution of AMTM common stock upon vesting of restricted stock units.	Common Stock	51,979	—	—	385,826
2025-12-17	Mullen Sean Thomas	Chief Growth Officer	Tax↓ Filing footnotes — Common Stock (Direct) Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.	Common Stock	4,194	$28.67	$120,242	26,138
2025-12-17	Mullen Sean Thomas	Chief Growth Officer	Convert↑ Filing footnotes — Common Stock (Direct) Represents distribution of AMTM common stock upon vesting of restricted stock units.	Common Stock	9,298	—	—	30,332
2025-12-17	Mullen Sean Thomas	Chief Growth Officer	Convert↓ Filing footnotes — Restricted Stock Units (Direct) Each restricted stock unit represents a contingent right to receive one share of AMTM common stock. Represents distribution of AMTM common stock upon vesting of restricted stock units. The restricted stock units awarded vested on December 17, 2025.	Restricted Stock Units	9,298	—	—	0
2025-12-05	Burton Darren	Chief People Officer	Tax↓ Filing footnotes — Common Stock (Direct) Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.	Common Stock	1,392	$28.88	$40,201	23,600
2025-12-05	Burton Darren	Chief People Officer	Convert↑ Filing footnotes — Common Stock (Direct) Represents distribution of AMTM common stock upon vesting of restricted stock units.	Common Stock	2,721	—	—	24,992
2025-12-05	Burton Darren	Chief People Officer	Convert↓ Filing footnotes — Restricted Stock Units (Direct) Each restricted stock unit represents a contingent right to receive one share of AMTM common stock. Represents distribution of AMTM common stock upon vesting of restricted stock units. The restricted stock units awarded vested on December 5, 2025.	Restricted Stock Units	2,721	—	—	5,444
2025-11-17	DEMETRIOU STEVEN J.	Director	Convert↓ Filing footnotes — Restricted Stock Units (Direct) Each restricted stock unit represents a contingent right to receive one share of AMTM common stock. Represents distribution of AMTM common stock upon vesting of restricted stock units. The restricted stock units awarded vested on November 17, 2025.	Restricted Stock Units	43,396	—	—	0
2025-11-17	Johnson Travis Barton	Chief Financial Officer	Award↑ Filing footnotes — Common Stock (Direct) One-third of the restricted stock units shall vest on each of the first, second and third anniversaries of November 17, 2025.	Common Stock	100,220	—	—	108,675
2025-11-17	DEMETRIOU STEVEN J.	Director	Tax↓ Filing footnotes — Common Stock (Direct) Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.	Common Stock	17,077	$21.49	$366,985	709,121
2025-11-17	DEMETRIOU STEVEN J.	Director	Convert↑ Filing footnotes — Common Stock (Direct) Represents distribution of AMTM common stock upon vesting of restricted stock units.	Common Stock	43,396	—	—	726,198

Legend Buy — open-market purchase Sell — open-market sale ↑ Shares acquired ↓ Shares disposed (gift, conversion, tax…)

Showing 1–50 of 179 transactions

Key facts CIK 2011286 CUSIP 023939101 13F (30d) 103 filings 103 filers Visit website Investor relations