Company profile
Amentum Holdings, Inc. insider acquisitions
Company CIK 0002011286 · Reported insider acquisitions and filing context.
These are company listings. A transaction is linked to a particular security only when the filing provides enough information.
Company activity summary
By transaction date, as of October 23, 2026.
No records are loaded for this 7-day transaction window. This does not establish that no transactions occurred.
Known purchase value sums available amounts for non-derivative purchases only. Missing amounts are excluded. “Currency not specified” does not establish that the amounts share a currency. These summaries use all matching loaded records, while the timeline below covers only the current page.
Transaction timeline
Who reported an acquisition, and when the transaction occurred.
18 dated transactions · 8 of 8 reporting owners shown. Select one owner to focus the chart.
View timeline as a table
| Transaction date | Company / security | Reporting owners | Acquisition type |
|---|---|---|---|
| Dec 17, 2025 | Amentum Holdings, Inc.Common Stock | Mullen Sean Thomas | Exercise / conversion |
| Dec 5, 2025 | Amentum Holdings, Inc.Common Stock | Burton Darren | Exercise / conversion |
| Nov 17, 2025 | Amentum Holdings, Inc.Common Stock | Mullen Sean Thomas | Stock award |
| Nov 17, 2025 | Amentum Holdings, Inc.Common Stock | Burton Darren | Stock award |
| Nov 17, 2025 | Amentum Holdings, Inc.Common Stock | Johnson Travis Barton | Stock award |
| Nov 17, 2025 | Amentum Holdings, Inc.Common Stock | St. Mary Michele T | Stock award |
| Nov 17, 2025 | Amentum Holdings, Inc.Common Stock | DEMETRIOU STEVEN J. | Stock award |
| Nov 17, 2025 | Amentum Holdings, Inc.Common Stock | DEMETRIOU STEVEN J. | Exercise / conversion |
| Nov 16, 2025 | Amentum Holdings, Inc.Common Stock | Arnette Stephen A | Exercise / conversion |
| Nov 16, 2025 | Amentum Holdings, Inc.Common Stock | Arnette Stephen A | Exercise / conversion |
| Nov 16, 2025 | Amentum Holdings, Inc.Common Stock | Arnette Stephen A | Exercise / conversion |
| Nov 15, 2025 | Amentum Holdings, Inc.Common Stock | Arnette Stephen A | Exercise / conversion |
| Nov 6, 2025 | Amentum Holdings, Inc.Common Stock | Johnson Travis Barton | Exercise / conversion |
| Nov 6, 2025 | Amentum Holdings, Inc.Common Stock | Bruning Jill L | Exercise / conversion |
| Nov 6, 2025 | Amentum Holdings, Inc.Common Stock | Heller John E. | Exercise / conversion |
| Nov 6, 2025 | Amentum Holdings, Inc.Common Stock | Mullen Sean Thomas | Exercise / conversion |
| Nov 6, 2025 | Amentum Holdings, Inc.Common Stock | DEMETRIOU STEVEN J. | Exercise / conversion |
| Nov 6, 2025 | Amentum Holdings, Inc.Common Stock | Arnette Stephen A | Exercise / conversion |
Only transactions on this page are shown. Date windows end on the latest transaction date in this sample. Joint filings may appear on more than one row. Sales are not included. Share-price charts use a separate data source.
Share price & reported acquisitions
Daily closing prices from a separate source. The date window above also filters prices; reporting-owner and transaction-type selections filter the markers.
Price history is not available
Market-price history is not connected yet.
AMTM · Currency not specified. A marker uses that day's closing price, not the reported transaction price. No price is substituted for a missing trading day.
Reported acquisitions
Filing-date filters apply to the list and timeline. The summary above uses transaction dates.
| Filed / transacted | Reporting owners | Type / security | Quantity | Price / reference value | Details |
|---|---|---|---|---|---|
| Trade: | Mullen Sean ThomasChief Growth Officer | Exercise / conversionCommon StockNon-derivative security · Code M | 9,298 | Not reported *Value: Not reportedCurrency not specified | View ↗ |
| Trade: | Burton DarrenChief People Officer | Exercise / conversionCommon StockNon-derivative security · Code M | 2,721 | Not reported *Value: Not reportedCurrency not specified | View ↗ |
| Trade: | Mullen Sean ThomasChief Growth Officer | Stock awardCommon StockNon-derivative security · Code A | 17,817 | 0Value: 0Currency not specified | View ↗ |
| Trade: | Burton DarrenChief People Officer | Stock awardCommon StockNon-derivative security · Code A | 22,271 | 0Value: 0Currency not specified | View ↗ |
| Trade: | Johnson Travis BartonChief Financial Officer | Stock awardCommon StockNon-derivative security · Code A | 100,220 | 0Value: 0Currency not specified | View ↗ |
| Trade: | St. Mary Michele TChief Legal Officer & GC | Stock awardCommon StockNon-derivative security · Code A | 22,271 | 0Value: 0Currency not specified | View ↗ |
| Trade: | DEMETRIOU STEVEN J.Executive Chair · Director | Stock awardCommon StockNon-derivative security · Code A | 111,355 | 0Value: 0Currency not specified | View ↗ |
| Trade: | DEMETRIOU STEVEN J.Executive Chair · Director | Exercise / conversionCommon StockNon-derivative security · Code M | 43,396 | Not reported *Value: Not reportedCurrency not specified | View ↗ |
| Trade: | Arnette Stephen AChief Operating Officer | Exercise / conversionCommon StockNon-derivative security · Code M | 4,596 | Not reported *Value: Not reportedCurrency not specified | View ↗ |
| Trade: | Arnette Stephen AChief Operating Officer | Exercise / conversionCommon StockNon-derivative security · Code M | 3,681 | Not reported *Value: Not reportedCurrency not specified | View ↗ |
| Trade: | Arnette Stephen AChief Operating Officer | Exercise / conversionCommon StockNon-derivative security · Code M | 5,053 | Not reported *Value: Not reportedCurrency not specified | View ↗ |
| Trade: | Arnette Stephen AChief Operating Officer | Exercise / conversionCommon StockNon-derivative security · Code M | 5,758 | Not reported *Value: Not reportedCurrency not specified | View ↗ |
| Trade: | Johnson Travis BartonChief Financial Officer | Exercise / conversionCommon StockNon-derivative security · Code M | 12,097 | Not reported *Value: Not reportedCurrency not specified | View ↗ |
| Trade: | Bruning Jill LChief Technology Officer | Exercise / conversionCommon StockNon-derivative security · Code M | 4,838 | Not reported *Value: Not reportedCurrency not specified | View ↗ |
| Trade: | Heller John E.Chief Executive Officer · Director | Exercise / conversionCommon StockNon-derivative security · Code M | 39,617 | Not reported *Value: Not reportedCurrency not specified | View ↗ |
| Trade: | Mullen Sean ThomasChief Growth Officer | Exercise / conversionCommon StockNon-derivative security · Code M | 4,838 | Not reported *Value: Not reportedCurrency not specified | View ↗ |
| Trade: | DEMETRIOU STEVEN J.Executive Chair · Director | Exercise / conversionCommon StockNon-derivative security · Code M | 90,727 | Not reported *Value: Not reportedCurrency not specified | View ↗ |
| Trade: | Arnette Stephen AChief Operating Officer | Exercise / conversionCommon StockNon-derivative security · Code M | 12,701 | Not reported *Value: Not reportedCurrency not specified | View ↗ |
18 transactions on this page. Filing date, newest first.
Reporting owners are associated with a filing. Jointly reported amounts are not allocated to individual owners. Historical coverage is still being built. Read the methodology →