Amentum Holdings, Inc.
A global contractor providing engineering, technology, and mission-critical services to the U.S. government, allied nations, and commercial clients, Amentum handles everything from nuclear cleanup at the Hanford and Savannah River sites to space systems and cybersecurity. It was born in 2020 when AECOM sold its management services business, and in 2024 it merged with Jacobs' critical mission and cyber units. Its name is the Latin word for the leather strap javelin throwers used to add spin and range.
Granted 154.8K
Granted 16.6K
Granted 109.7K
Granted 13.9K
Granted 125.9K
Granted 48.2K
Granted 16.6K
Granted 41.0K
Granted 5.1K
Granted 29.4K
Granted 25.0K
Granted 16.6K
Granted 16.6K
Granted 5.1K
Granted 5.1K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Demetriou Steven J.Executive Chair, Director · 3 transactions | — | 1.59M | 154.8K | — | — |
| Vollmer John C.Director · 2 transactions | +7.6% | 424.8K | 16.6K | — | — |
| Heller John E.Chief Executive Officer, Director · 6 transactions | +309.6% | 376.0K | 109.7K | — | — |
| Bruning Jill LChief Technology Officer · 5 transactions | — | 197.5K | 13.9K | — | — |
| Johnson Travis BartonChief Financial Officer · 5 transactions | — | 122.3K | 125.9K | — | — |
| Arnette Stephen AChief Operating Officer · 14 transactions | +381% | 106.7K | 48.2K | — | — |
| Eberhart Ralph EDirector · 2 transactions | +44.1% | 43.1K | 16.6K | — | — |
| Mullen Sean ThomasChief Growth Officer · 7 transactions | — | 35.2K | 41.0K | — | — |
| Thompson Christopher M.T.Director · 1 transaction | — | 29.1K | 5.1K | — | — |
| St. Mary Michele TChief Legal Officer & GC · 3 transactions | — | 27.0K | 29.4K | — | — |
| Burton DarrenChief People Officer · 3 transactions | — | 23.6K | 25.0K | — | — |
| Brooks Vincent KDirector · 2 transactions | +115.1% | 22.4K | 16.6K | — | — |
| Rowland Sandra E.Director · 2 transactions | +482.3% | 20.1K | 16.6K | — | — |
| Loughran BarbaraDirector · 1 transaction | +110% | 9.7K | 5.1K | — | — |
| Ireland Susan LeslieDirector · 1 transaction | +146.9% | 8.5K | 5.1K | — | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.