Insider Transactions Reported by 30 Insiders of Amentum Holdings, Inc.

Symbol
AMTM on NYSE
Location
Chantilly, VA

There are no Buy or Sell transactions made by insiders since 12 Mar 2025

Amentum Holdings, Inc. executives and other stock owners filed with the SEC include:

Name Relationship Holdings Value Past Year Net Change Change % Report Date
ASP Manager Corp. 10%+ Owner $913,300,461 17 Dec 2024
ASP Amentum Investco LP 10%+ Owner $913,300,461 17 Dec 2024
Alan E. Goldberg Director, 10%+ Owner $817,235,385 08 May 2025
Goldberg 2014 LLC 10%+ Owner $817,235,385 08 May 2025
Lindsay Goldberg Employee Co-Inv. IV L.P. 10%+ Owner $817,235,385 08 May 2025
STEVEN J. DEMETRIOU Executive Chair, Director $30,888,441 17 Nov 2025
John E. Heller Chief Executive Officer, Director $16,381,715 28 Jan 2026
John C. Vollmer Director $14,671,948 06 Feb 2026
Jill L. Bruning Chief Technology Officer $6,051,441 04 Mar 2026
Travis Barton Johnson Chief Financial Officer $3,104,615 17 Nov 2025
Stephen A. Arnette Chief Operating Officer $2,897,454 02 Mar 2026
RALPH E. EBERHART Director $1,834,637 06 Feb 2026
Mary Michele T. St. Chief Legal Officer & GC $1,210,080 17 Feb 2026
Christopher M.T. Thompson Director $1,193,717 06 Feb 2026
Vincent K. Brooks Director $1,139,909 06 Feb 2026
Sean Thomas Mullen Chief Growth Officer $946,726 17 Dec 2025
Sandra E. Rowland Director $891,416 06 Feb 2026
Darren Burton Chief People Officer $854,870 05 Dec 2025
Barbara Loughran Director $541,295 06 Feb 2026
SUSAN LESLIE IRELAND Director $502,519 06 Feb 2026
Stuart Ira Young Chief Legal Officer $77,026 06 Nov 2024
Amentum Joint Venture GP LLC Director $0 08 May 2025
JACOBS SOLUTIONS INC. 10%+ Owner $0 13 Mar 2025
J. Russell Triedman Director 27 Sep 2024
Justin C. Johnson Secretary 18 Sep 2024
ROBERT PRAGADA V. Chief Executive Officer, Director 18 Sep 2024
Chin Chang Hsu Treasurer 18 Sep 2024
Connor Wentzell Director 27 Sep 2024
Benjamin Buhl Dickson Director 27 Sep 2024
Kevin C. Berryman Chief Financial Officer, Director 18 Sep 2024

Recent Insider Transactions by Companies or Individuals for Amentum Holdings, Inc.

Insider Symbol Class Transaction % Value $ * Price $ Shares Shares Owned Date Ownership
Jill L. Bruning AMTM Common Stock Gift -13.6% -30,000 190,999 04 Mar 2026 Direct
Stephen A. Arnette AMTM Common Stock Tax liability -0.77% -750 96,357 02 Mar 2026 Direct
Stephen A. Arnette AMTM Common Stock Options Exercise 2.98% 2,808 97,107 02 Mar 2026 Direct
Stephen A. Arnette AMTM Restricted Stock Units Options Exercise -100% -2,808 0 02 Mar 2026 Direct
Mary Michele T. St. AMTM Common Stock Tax liability -7.86% -2,308 27,043 17 Feb 2026 Direct
Mary Michele T. St. AMTM Common Stock Options Exercise 31.8% 7,080 29,351 17 Feb 2026 Direct
Mary Michele T. St. AMTM Restricted Stock Units Options Exercise -33.3% -7,080 14,162 17 Feb 2026 Direct
SUSAN LESLIE IRELAND AMTM Common Stock Award 146.8% 5,062 8,509 06 Feb 2026 Direct
Sandra E. Rowland AMTM Common Stock Award 33.7% 5,062 20,073 06 Feb 2026 Direct
Sandra E. Rowland AMTM Common Stock Options Exercise 335.5% 11,564 15,011 06 Feb 2026 Direct
Sandra E. Rowland AMTM Restricted Stock Units Options Exercise -100% -11,564 0 06 Feb 2026 Direct
Vincent K. Brooks AMTM Common Stock Award 22.6% 5,062 27,462 06 Feb 2026 Direct
Vincent K. Brooks AMTM Common Stock Options Exercise 106.7% 11,564 22,400 06 Feb 2026 Direct
Vincent K. Brooks AMTM Restricted Stock Units Options Exercise -100% -11,564 0 06 Feb 2026 Direct
RALPH E. EBERHART AMTM Common Stock Award 11.8% 5,062 48,120 06 Feb 2026 Direct
RALPH E. EBERHART AMTM Common Stock Options Exercise 36.7% 11,564 43,058 06 Feb 2026 Direct
RALPH E. EBERHART AMTM Restricted Stock Units Options Exercise -100% -11,564 0 06 Feb 2026 Direct
Barbara Loughran AMTM Common Stock Award 110% 5,062 9,662 06 Feb 2026 Direct
Christopher M.T. Thompson AMTM Common Stock Award 5,062 5,062 06 Feb 2026 Direct
John C. Vollmer AMTM Common Stock Award 1.19% 5,062 429,842 06 Feb 2026 Direct
John C. Vollmer AMTM Common Stock Options Exercise 2.8% 11,564 424,780 06 Feb 2026 Direct
John C. Vollmer AMTM Restricted Stock Units Options Exercise -100% -11,564 0 06 Feb 2026 Direct
John E. Heller AMTM Common Stock Tax liability -5.12% -19,768 366,058 28 Jan 2026 Direct
John E. Heller AMTM Common Stock Options Exercise 15.6% 51,979 385,826 28 Jan 2026 Direct
John E. Heller AMTM Restricted Stock Units Options Exercise -33.3% -51,979 103,959 28 Jan 2026 Direct
Sean Thomas Mullen AMTM Common Stock Tax liability -13.8% -4,194 26,138 17 Dec 2025 Direct
Sean Thomas Mullen AMTM Common Stock Options Exercise 44.2% 9,298 30,332 17 Dec 2025 Direct
Sean Thomas Mullen AMTM Restricted Stock Units Options Exercise -100% -9,298 0 17 Dec 2025 Direct
Darren Burton AMTM Common Stock Tax liability -5.57% -1,392 23,600 05 Dec 2025 Direct
Darren Burton AMTM Common Stock Options Exercise 12.2% 2,721 24,992 05 Dec 2025 Direct
Darren Burton AMTM Restricted Stock Units Options Exercise -33.3% -2,721 5,444 05 Dec 2025 Direct
Sean Thomas Mullen AMTM Common Stock Award 553.8% 17,817 21,034 17 Nov 2025 Direct
Darren Burton AMTM Common Stock Award 22,271 22,271 17 Nov 2025 Direct
Travis Barton Johnson AMTM Common Stock Award 1185.3% 100,220 108,675 17 Nov 2025 Direct
Mary Michele T. St. AMTM Common Stock Award 22,271 22,271 17 Nov 2025 Direct
STEVEN J. DEMETRIOU AMTM Common Stock Award 15.7% 111,355 820,476 17 Nov 2025 Direct
STEVEN J. DEMETRIOU AMTM Common Stock Tax liability -2.35% -17,077 709,121 17 Nov 2025 Direct
STEVEN J. DEMETRIOU AMTM Common Stock Options Exercise 6.36% 43,396 726,198 17 Nov 2025 Direct
STEVEN J. DEMETRIOU AMTM Restricted Stock Units Options Exercise -100% -43,396 0 17 Nov 2025 Direct
Stephen A. Arnette AMTM Common Stock Tax liability -7.54% -3,248 39,805 16 Nov 2025 Direct
Stephen A. Arnette AMTM Common Stock Options Exercise 39.4% 13,330 47,185 16 Nov 2025 Direct
Stephen A. Arnette AMTM Restricted Stock Units Options Exercise -100% -13,330 0 16 Nov 2025 Direct
Stephen A. Arnette AMTM Common Stock Tax liability -3.75% -1,403 35,983 15 Nov 2025 Direct
Stephen A. Arnette AMTM Common Stock Options Exercise 18.2% 5,758 37,386 15 Nov 2025 Direct
Stephen A. Arnette AMTM Restricted Stock Units Options Exercise -33.3% -5,758 11,515 15 Nov 2025 Direct
Jill L. Bruning AMTM Common Stock Tax liability -30.1% -1,457 3,381 06 Nov 2025 Direct
Jill L. Bruning AMTM Common Stock Options Exercise 4,838 4,838 06 Nov 2025 Direct
Jill L. Bruning AMTM Restricted Stock Units Options Exercise -33.3% -4,838 9,678 06 Nov 2025 Direct
Sean Thomas Mullen AMTM Common Stock Tax liability -33.5% -1,621 3,217 06 Nov 2025 Direct
Sean Thomas Mullen AMTM Common Stock Options Exercise 4,838 4,838 06 Nov 2025 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.