There have been 50 recent insider transactions recorded for Amentum Holdings, Inc. (AMTM), including 21 buys and 24 sells. Total insider buying was valued at RSU Award and total insider selling at $341.07K.
Notable insiders with recent activity include Bruning Jill L, Arnette Stephen A, St. Mary Michele T. Insider transactions can provide insights into how company leadership views the stock's valuation and future prospects.
Insider Transactions — AMTM
| Date |
Name |
Role |
Transaction |
Shares |
Avg. Price |
Value |
Shares Owned |
| 2026-03-04 |
Bruning Jill L |
Chief Technology Officer |
Gift (Given) |
30,000 |
- |
- |
190,999 |
| 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 |
- |
- |
14,162 |
| 2026-02-06 |
Eberhart Ralph E |
Director |
Option Exercise (Sell) |
11,564 |
- |
- |
- |
| 2026-02-06 |
Thompson Christopher M.t. |
Director |
RSU Award |
5,062 |
- |
- |
5,062 |
| 2026-02-06 |
Rowland Sandra E. |
Director |
Option Exercise (Sell) |
11,564 |
- |
- |
- |
| 2026-02-06 |
Ireland Susan Leslie |
Director |
RSU Award |
5,062 |
- |
- |
8,509 |
| 2026-02-06 |
Vollmer John C. |
Director |
Option Exercise (Sell) |
11,564 |
- |
- |
- |
| 2026-02-06 |
Loughran Barbara |
Director |
RSU Award |
5,062 |
- |
- |
9,662 |
| 2026-02-06 |
Brooks Vincent K |
Director |
Option Exercise (Sell) |
11,564 |
- |
- |
- |
| 2026-01-28 |
Heller John E. |
Chief Executive Officer |
Option Exercise (Sell) |
51,979 |
- |
- |
103,959 |
| 2025-12-17 |
Mullen Sean Thomas |
Chief Growth Officer |
Option Exercise (Sell) |
9,298 |
- |
- |
- |
| 2025-12-05 |
Burton Darren |
Chief People Officer |
Option Exercise (Sell) |
2,721 |
- |
- |
5,444 |
| 2025-11-17 |
Demetriou Steven J. |
Executive Chair |
Option Exercise (Sell) |
43,396 |
- |
- |
- |
| 2025-11-17 |
Heller John E. |
Chief Executive Officer |
RSU Award |
155,897 |
- |
- |
269,440 |
| 2025-11-17 |
Johnson Travis Barton |
Chief Financial Officer |
RSU Award |
100,220 |
- |
- |
108,675 |
| 2025-11-17 |
Arnette Stephen A |
Chief Operating Officer |
Option Exercise (Sell) |
1,178 |
- |
- |
- |
| 2025-11-17 |
Mullen Sean Thomas |
Chief Growth Officer |
RSU Award |
17,817 |
- |
- |
21,034 |
| 2025-11-17 |
Bruning Jill L |
Chief Technology Officer |
RSU Award |
17,817 |
- |
- |
21,198 |
| 2025-11-17 |
Burton Darren |
Chief People Officer |
RSU Award |
22,271 |
- |
- |
22,271 |
| 2025-11-17 |
St. Mary Michele T |
Chief Legal Officer & Gc |
RSU Award |
22,271 |
- |
- |
22,271 |
| 2025-11-17 |
Heller John E. |
Chief Executive Officer |
Unknown |
- |
- |
- |
- |
| 2025-11-17 |
Arnette Stephen A |
Officer |
Unknown |
- |
- |
- |
- |
| 2025-11-17 |
Bruning Jill L |
Officer |
Unknown |
- |
- |
- |
- |
| 2025-11-16 |
Arnette Stephen A |
Chief Operating Officer |
Option Exercise (Sell) |
4,596 |
- |
- |
- |
| 2025-11-15 |
Arnette Stephen A |
Chief Operating Officer |
Option Exercise (Sell) |
5,758 |
- |
- |
11,515 |
| 2025-11-06 |
Demetriou Steven J. |
Executive Chair |
Unknown |
- |
- |
- |
- |
| 2025-11-06 |
Demetriou Steven J. |
Executive Chair |
Option Exercise (Sell) |
90,727 |
- |
- |
- |
| 2025-11-06 |
Heller John E. |
Chief Executive Officer |
Option Exercise (Sell) |
39,617 |
- |
- |
79,236 |
| 2025-11-06 |
Johnson Travis Barton |
Chief Financial Officer |
Tax Withholding of RSU |
3,642 |
$21.79 |
$79.36K |
8,455 |
| 2025-11-06 |
Arnette Stephen A |
Chief Operating Officer |
Option Exercise (Sell) |
12,701 |
- |
- |
25,404 |
| 2025-11-06 |
Mullen Sean Thomas |
Chief Growth Officer |
Tax Withholding of RSU |
1,621 |
$21.79 |
$35.32K |
3,217 |
| 2025-11-06 |
Bruning Jill L |
Chief Technology Officer |
Tax Withholding of RSU |
1,457 |
$21.79 |
$31.75K |
3,381 |
| 2025-05-08 |
Goldberg Alan E |
10 Percent Owner |
Other (Buy) |
1,132,839 |
- |
- |
45,026,743 |
| 2025-05-08 |
Lindsay Goldberg Employee Co-inv. Iv L.p. |
10 Percent Owner |
Other (Buy) |
1,132,839 |
- |
- |
45,026,743 |
| 2025-05-08 |
Amentum Joint Venture Gp Llc |
Director |
Other (Sell) |
2,433,022 |
- |
- |
- |
| 2025-05-08 |
Goldberg 2014 Llc |
10 Percent Owner |
Other (Buy) |
1,132,839 |
- |
- |
45,026,743 |
| 2025-04-08 |
Eberhart Ralph E |
Director |
RSU Award |
11,564 |
- |
- |
11,564 |
| 2025-04-08 |
Thompson Christopher M.t. |
Director |
RSU Award |
11,564 |
- |
- |
11,564 |
| 2025-04-08 |
Rowland Sandra E. |
Director |
RSU Award |
11,564 |
- |
- |
11,564 |
| 2025-04-08 |
Ireland Susan Leslie |
Director |
RSU Award |
11,564 |
- |
- |
11,564 |
| 2025-04-08 |
Vollmer John C. |
Director |
RSU Award |
11,564 |
- |
- |
11,564 |
| 2025-04-08 |
Loughran Barbara |
Director |
RSU Award |
11,564 |
- |
- |
11,564 |
| 2025-04-08 |
Brooks Vincent K |
Director |
RSU Award |
11,564 |
- |
- |
11,564 |
| 2025-04-07 |
Amentum Joint Venture Gp Llc |
Director |
RSU Award |
2,433,022 |
- |
- |
2,433,022 |
| 2025-03-17 |
St. Mary Michele T |
Chief Legal Officer & Gc |
RSU Award |
21,242 |
- |
- |
21,242 |
| 2025-03-13 |
Jacobs Solutions Inc. |
10 Percent Owner |
Other (Sell) |
19,464,174 |
$0.01 |
$194.64K |
- |
| 2025-03-05 |
Eberhart Ralph E |
Director |
Option Exercise (Sell) |
3,447 |
- |
- |
- |
| 2025-03-05 |
Rowland Sandra E. |
Director |
Option Exercise (Sell) |
3,447 |
- |
- |
- |
| 2025-03-05 |
Ireland Susan Leslie |
Director |
Option Exercise (Sell) |
3,447 |
- |
- |
- |
■ Informative Buy/Sell — open market transaction (most significant)
■ Uninformative Buy — award, option exercise, conversion
■ Uninformative Sell — tax withholding, award vest sale
■ Neutral — gift, trust, expiry
