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  4. AMENTUM HOLDINGS INC.
Amentum Holdings Inc. XNYS: AMTM
31.56 1.08 (3.54%)
1.1M
XNYS Volume

XNYS 05 Jan, 2026 1:33 PM (EST)

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Insider Trading disclosures for Amentum Holdings Inc

The latest disclosure was made by Sean Thomas Mullen in Amentum Holdings Inc where a trade of 9,298 Common Stock done was reported to US exchanges on Dec. 17, 2025.

Insider trading is the trading of a company’s securities by individuals with access to confidential or material non-public information about the company. A company is required to report trading by corporate officers, directors, or other company members with significant access to privileged information to the Securities and Exchange Commission (SEC).

Client Name Client Category Action Reported to Exchange Quantity Post Transaction Holding Traded % Avg. Price Value Security Type
Sean Thomas Mullen Chief Growth Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 17 Dec 2025 9,298 30,332 - - Common Stock
Sean Thomas Mullen Chief Growth Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 17 Dec 2025 9,298 0 - - Restricted Stock Units
Sean Thomas Mullen Chief Growth Officer Payment of exercise price or tax liability using portion of securities received from the company at price $ 28.67 per share. 17 Dec 2025 4,194 26,138 - 28.7 120,242 Common Stock
Darren Burton Chief People Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 05 Dec 2025 2,721 24,992 - - Common Stock
Darren Burton Chief People Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 05 Dec 2025 2,721 5,444 - - Restricted Stock Units
Darren Burton Chief People Officer Payment of exercise price or tax liability using portion of securities received from the company at price $ 28.88 per share. 05 Dec 2025 1,392 23,600 - 28.9 40,201 Common Stock
Steven J. Demetriou Director, Executive Chair Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 17 Nov 2025 43,396 726,198 - - Common Stock
Steven J. Demetriou Director, Executive Chair Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 17 Nov 2025 43,396 0 - - Restricted Stock Units
Steven J. Demetriou Director, Executive Chair Grant, award, or other acquisition of securities at price $ 0.00 per share. 17 Nov 2025 111,355 820,476 - 0 Common Stock
Steven J. Demetriou Director, Executive Chair Payment of exercise price or tax liability using portion of securities received from the company at price $ 21.49 per share. 17 Nov 2025 17,077 709,121 - 21.5 366,985 Common Stock
John E. Heller Director, Chief Executive Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 17 Nov 2025 155,897 269,440 - 0 Common Stock
Travis Barton Johnson Chief Financial Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 17 Nov 2025 100,220 108,675 - 0 Common Stock
Stephen A. Arnette Chief Operating Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 17 Nov 2025 46,769 93,725 - 0 Common Stock
Stephen A. Arnette Chief Operating Officer Payment of exercise price or tax liability using portion of securities received from the company at price $ 21.49 per share. 17 Nov 2025 287 46,956 - 21.5 6,168 Common Stock
Stephen A. Arnette Chief Operating Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 17 Nov 2025 1,178 47,243 - - Common Stock
Stephen A. Arnette Chief Operating Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 17 Nov 2025 1,178 0 - - Restricted Stock Units
Sean Thomas Mullen Chief Growth Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 17 Nov 2025 17,817 21,034 - 0 Common Stock
Jill L. Bruning Chief Technology Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 17 Nov 2025 17,817 21,198 - 0 Common Stock
Darren Burton Chief People Officer 17 Nov 2025 22,271 22,271 - 0 Common Stock
Michele T. St. Mary Chief Legal Officer & GC 17 Nov 2025 22,271 22,271 - 0 Common Stock
Stephen A. Arnette Chief Operating Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 15 Nov 2025 5,758 37,386 - - Common Stock
Stephen A. Arnette Chief Operating Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 15 Nov 2025 3,681 0 - - Restricted Stock Units
Stephen A. Arnette Chief Operating Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 15 Nov 2025 4,596 0 - - Restricted Stock Units
Stephen A. Arnette Chief Operating Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 15 Nov 2025 5,053 5,053 - - Restricted Stock Units
Stephen A. Arnette Chief Operating Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 15 Nov 2025 5,758 11,515 - - Restricted Stock Units
Stephen A. Arnette Chief Operating Officer Payment of exercise price or tax liability using portion of securities received from the company at price $ 22.07 per share. 15 Nov 2025 1,120 46,065 - 22.1 24,718 Common Stock
Stephen A. Arnette Chief Operating Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 15 Nov 2025 4,596 47,185 - - Common Stock
Stephen A. Arnette Chief Operating Officer Payment of exercise price or tax liability using portion of securities received from the company at price $ 22.07 per share. 15 Nov 2025 897 42,589 - 22.1 19,797 Common Stock
Stephen A. Arnette Chief Operating Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 15 Nov 2025 3,681 43,486 - - Common Stock
Stephen A. Arnette Chief Operating Officer Payment of exercise price or tax liability using portion of securities received from the company at price $ 22.07 per share. 15 Nov 2025 1,231 39,805 - 22.1 27,168 Common Stock
Stephen A. Arnette Chief Operating Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 15 Nov 2025 5,053 41,036 - - Common Stock
Stephen A. Arnette Chief Operating Officer Payment of exercise price or tax liability using portion of securities received from the company at price $ 22.07 per share. 15 Nov 2025 1,403 35,983 - 22.1 30,964 Common Stock
Steven J. Demetriou Director, Executive Chair Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 06 Nov 2025 90,727 0 - - Restricted Stock Units
Steven J. Demetriou Director, Executive Chair Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 06 Nov 2025 90,727 711,620 - - Common Stock
Steven J. Demetriou Director, Executive Chair Payment of exercise price or tax liability using portion of securities received from the company at price $ 21.79 per share. 06 Nov 2025 28,818 682,802 - 21.8 627,944 Common Stock
John E. Heller Director, Chief Executive Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 06 Nov 2025 39,617 131,411 - - Common Stock
John E. Heller Director, Chief Executive Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 06 Nov 2025 39,617 79,236 - - Restricted Stock Units
John E. Heller Director, Chief Executive Officer Payment of exercise price or tax liability using portion of securities received from the company at price $ 21.79 per share. 06 Nov 2025 17,868 113,543 - 21.8 389,344 Common Stock
Travis Barton Johnson Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 06 Nov 2025 12,097 24,194 - - Restricted Stock Units
Travis Barton Johnson Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 06 Nov 2025 12,097 12,097 - - Common Stock
Travis Barton Johnson Chief Financial Officer Payment of exercise price or tax liability using portion of securities received from the company at price $ 21.79 per share. 06 Nov 2025 3,642 8,455 - 21.8 79,359 Common Stock
Stephen A. Arnette Chief Operating Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 06 Nov 2025 12,701 25,404 - - Restricted Stock Units
Stephen A. Arnette Chief Operating Officer Payment of exercise price or tax liability using portion of securities received from the company at price $ 21.79 per share. 06 Nov 2025 3,093 31,628 - 21.8 67,396 Common Stock
Stephen A. Arnette Chief Operating Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 06 Nov 2025 12,701 34,721 - - Common Stock
Sean Thomas Mullen Chief Growth Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 06 Nov 2025 4,838 4,838 - - Common Stock
Sean Thomas Mullen Chief Growth Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 06 Nov 2025 4,838 9,678 - - Restricted Stock Units
Sean Thomas Mullen Chief Growth Officer Payment of exercise price or tax liability using portion of securities received from the company at price $ 21.79 per share. 06 Nov 2025 1,621 3,217 - 21.8 35,322 Common Stock
Jill L. Bruning Chief Technology Officer Payment of exercise price or tax liability using portion of securities received from the company at price $ 21.79 per share. 06 Nov 2025 1,457 3,381 - 21.8 31,748 Common Stock
Jill L. Bruning Chief Technology Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 06 Nov 2025 4,838 9,678 - - Restricted Stock Units
Jill L. Bruning Chief Technology Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 06 Nov 2025 4,838 4,838 - - Common Stock
Alan E. Goldberg Director, Ten Percent Owner Other type of transaction at price $ 0.00 per share. 08 May 2025 1,132,839 45,026,743 - - Common Stock
Ralph E. Eberhart Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 08 Apr 2025 11,564 11,564 - - Restricted Stock Units
Christopher M.T. Thompson Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 08 Apr 2025 11,564 11,564 - - Restricted Stock Units
Sandra E. Rowland Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 08 Apr 2025 11,564 11,564 - - Restricted Stock Units
S. Leslie Ireland Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 08 Apr 2025 11,564 11,564 - - Restricted Stock Units
John C. Vollmer Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 08 Apr 2025 11,564 11,564 - - Restricted Stock Units
Barbara L. Loughran Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 08 Apr 2025 11,564 11,564 - - Restricted Stock Units
Vincent K. Brooks Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 08 Apr 2025 11,564 11,564 - - Restricted Stock Units
Michele T. St. Mary Chief Legal Officer & GC 17 Mar 2025 21,242 21,242 - - Restricted Stock Units
Ralph E. Eberhart Director Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 05 Mar 2025 3,447 0 - - Restricted Stock Units
Ralph E. Eberhart Director Other type of transaction at price $ 0.00 per share. 05 Mar 2025 26,439 26,439 - - Common Stock
Ralph E. Eberhart Director Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 05 Mar 2025 3,447 29,886 - - Common Stock
Sandra E. Rowland Director Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 05 Mar 2025 3,447 3,447 - - Common Stock
Sandra E. Rowland Director Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 05 Mar 2025 3,447 0 - - Restricted Stock Units
S. Leslie Ireland Director Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 05 Mar 2025 3,447 0 - - Restricted Stock Units
S. Leslie Ireland Director Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 05 Mar 2025 3,447 3,447 - - Common Stock
John C. Vollmer Director Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 05 Mar 2025 3,447 0 - - Restricted Stock Units
John C. Vollmer Director Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 05 Mar 2025 3,447 394,788 - - Common Stock
John C. Vollmer Director Other type of transaction at price $ 0.00 per share. 05 Mar 2025 391,341 391,341 - - Common Stock
Vincent K. Brooks Director Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 05 Mar 2025 3,447 0 - - Restricted Stock Units
Vincent K. Brooks Director Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 05 Mar 2025 3,447 10,413 - - Common Stock
Vincent K. Brooks Director Other type of transaction at price $ 0.00 per share. 05 Mar 2025 6,966 6,966 - - Common Stock
Stephen A. Arnette Chief Operating Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 03 Mar 2025 521 0 - - Restricted Stock Units
Stephen A. Arnette Chief Operating Officer Other type of transaction at price $ 0.00 per share. 03 Mar 2025 20,786 20,786 - - Common Stock
Stephen A. Arnette Chief Operating Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 03 Mar 2025 1,230 22,016 - - Common Stock
Stephen A. Arnette Chief Operating Officer Payment of exercise price or tax liability using portion of securities received from the company at price $ 19.64 per share. 03 Mar 2025 365 21,651 - 19.6 7,169 Common Stock
Stephen A. Arnette Chief Operating Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 03 Mar 2025 521 22,172 - - Common Stock
Stephen A. Arnette Chief Operating Officer Payment of exercise price or tax liability using portion of securities received from the company at price $ 18.71 per share. 03 Mar 2025 152 22,020 - 18.7 2,844 Common Stock
Stephen A. Arnette Chief Operating Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 03 Mar 2025 1,230 2,808 - - Restricted Stock Units
Barbara L. Loughran Director Purchase of securities on an exchange or from another person at price $ 21.22 per share. 18 Feb 2025 4,600 4,600 - 21.2 97,635 Common Stock
Steven J. Demetriou Director, Executive Chair Other type of transaction at price $ 0.00 per share. 12 Feb 2025 520,893 520,893 - - Common Stock
Steven J. Demetriou Director, Executive Chair Purchase of securities on an exchange or from another person at price $ 20.81 per share. 12 Feb 2025 100,000 620,893 - 20.8 2,080,700 Common Stock
John E. Heller Director, Chief Executive Officer Other type of transaction at price $ 0.00 per share. 28 Jan 2025 91,794 91,794 - - Common Stock
John E. Heller Director, Chief Executive Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 28 Jan 2025 1,373,955 1,373,955 - - Stock Option
John E. Heller Director, Chief Executive Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 28 Jan 2025 155,938 155,938 - - Restricted Stock Units
Thomas Mullen Sean Chief Growth Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 20 Dec 2024 9,298 9,298 - - Restricted Stock Units
E. Alan Goldberg Director, Ten Percent Owner Other type of transaction at price $ 0.00 per share. 17 Dec 2024 43,893,904 43,893,904 - - Common Stock
Darren Burton Chief People Officer 05 Dec 2024 8,165 8,165 - - Restricted Stock Units
Ralph E. Eberhart Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 06 Nov 2024 3,447 3,447 - - Restricted Stock Units
Steven J. Demetriou Director, Executive Chair Grant, award, or other acquisition of securities at price $ 0.00 per share. 06 Nov 2024 90,727 90,727 - - Restricted Stock Units
Christopher M.T. Thompson Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 06 Nov 2024 3,447 3,447 - - Restricted Stock Units
John E. Heller Director, Chief Executive Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 06 Nov 2024 118,853 118,853 - - Restricted Stock Units
John E. Heller Director, Chief Executive Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 06 Nov 2024 36,291 36,291 - - Restricted Stock Units
Sandra E. Rowland Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 06 Nov 2024 3,447 3,447 - - Restricted Stock Units
S. Leslie Ireland Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 06 Nov 2024 3,447 3,447 - - Restricted Stock Units
John C. Vollmer Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 06 Nov 2024 3,447 3,447 - - Restricted Stock Units
Barbara L. Loughran Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 06 Nov 2024 3,447 3,447 - - Restricted Stock Units
Travis Barton Johnson Chief Financial Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 06 Nov 2024 27,218 27,218 - - Restricted Stock Units
Travis Barton Johnson Chief Financial Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 06 Nov 2024 36,291 36,291 - - Restricted Stock Units
Vincent K. Brooks Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 06 Nov 2024 3,447 3,447 - - Restricted Stock Units
Stephen A. Arnette Chief Operating Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 06 Nov 2024 27,218 27,218 - - Restricted Stock Units
Stephen A. Arnette Chief Operating Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 06 Nov 2024 38,105 38,105 - - Restricted Stock Units
Sean Thomas Mullen Chief Growth Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 06 Nov 2024 14,516 14,516 - - Restricted Stock Units
Sean Thomas Mullen Chief Growth Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 06 Nov 2024 18,145 18,145 - - Restricted Stock Units
Stuart Ira Young Chief Legal Officer 06 Nov 2024 3,629 3,629 - - Restricted Stock Units
Jill L. Bruning Chief Technology Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 06 Nov 2024 18,145 18,145 - - Restricted Stock Units
Jill L. Bruning Chief Technology Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 06 Nov 2024 14,516 14,516 - - Restricted Stock Units
Steven J. Demetriou Director, Executive Chair Grant, award, or other acquisition of securities at price $ 0.00 per share. 02 Oct 2024 43,396 43,396 - - Restricted Stock Units
Stephen A. Arnette Chief Operating Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 02 Oct 2024 521 521 - - Restricted Stock Units
Stephen A. Arnette Chief Operating Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 02 Oct 2024 1,178 1,178 - - Restricted Stock Units
Stephen A. Arnette Chief Operating Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 02 Oct 2024 4,038 4,038 - - Restricted Stock Units
Stephen A. Arnette Chief Operating Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 02 Oct 2024 10,106 10,106 - - Restricted Stock Units
Stephen A. Arnette Chief Operating Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 02 Oct 2024 17,273 17,273 - - Restricted Stock Units
Stephen A. Arnette Chief Operating Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 02 Oct 2024 3,681 3,681 - - Restricted Stock Units
Stephen A. Arnette Chief Operating Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 02 Oct 2024 4,596 4,596 - - Restricted Stock Units
Stephen A. Arnette Chief Operating Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 02 Oct 2024 10,984 10,984 - - Restricted Stock Units
Stephen A. Arnette Chief Operating Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 02 Oct 2024 10,395 10,395 - - Restricted Stock Units
*All Values are in $ Million
Client Category: Promoter/ KMP/ Director / Immediate Relatives / Employee / etc  
Security Type: Share/ Warrants / Convertible Debentures
Data as reported to USA Exchanges
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