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Amentum

Amentum (NYSE: AMTM) insider transactions

In the twelve months to 10 November 2026, executives and directors of Amentum reported no open-market sales and no open-market purchases, according to the Form 4 filings they submitted to the SEC.

Latest transactions

The 20 most recent transactions in Amentum shares reported on Form 4
DateInsiderRoleTransactionSharesPriceHeld afterFiling
6 November 2026Heller John E.Chief Executive OfficerOption exercise+39,618—415,637Form 4
6 November 2026Heller John E.Chief Executive OfficerShares withheld for tax−17,868$21.25397,769Form 4
6 November 2026Johnson Travis BartonChief Financial OfficerOption exercise+12,097—130,284Form 4
6 November 2026Johnson Travis BartonChief Financial OfficerShares withheld for tax−5,064$21.25125,220Form 4
6 November 2026Arnette Stephen AChief Operating OfficerOption exercise+12,702—119,354Form 4
6 November 2026Arnette Stephen AChief Operating OfficerShares withheld for tax−4,999$21.25114,355Form 4
6 November 2026Mullen Sean ThomasChief Growth OfficerOption exercise+4,839—37,287Form 4
6 November 2026Mullen Sean ThomasChief Growth OfficerShares withheld for tax−2,183$21.2535,104Form 4
6 November 2026Bruning Jill LChief Technology OfficerOption exercise+4,839—203,222Form 4
6 November 2026Bruning Jill LChief Technology OfficerShares withheld for tax−1,457$21.25201,765Form 4
14 August 2026Thompson Christopher M.T.DirectorGift−4,250—5,750Form 4
6 May 2026Arnette Stephen AChief Operating OfficerOption exercise+13,609—109,966Form 4
6 May 2026Arnette Stephen AChief Operating OfficerShares withheld for tax−3,314$24.89106,652Form 4
6 May 2026Bruning Jill LChief Technology OfficerOption exercise+9,072—200,188Form 4
6 May 2026Bruning Jill LChief Technology OfficerShares withheld for tax−2,731$24.89197,457Form 4
6 May 2026Johnson Travis BartonChief Financial OfficerOption exercise+13,609—122,284Form 4
6 May 2026Johnson Travis BartonChief Financial OfficerShares withheld for tax−4,097$24.89118,187Form 4
6 May 2026Mullen Sean ThomasChief Growth OfficerOption exercise+9,072—35,210Form 4
6 May 2026Mullen Sean ThomasChief Growth OfficerShares withheld for tax−2,762$24.8932,448Form 4
6 May 2026Heller John E.Chief Executive OfficerOption exercise+18,145—384,203Form 4

Names appear as in the filing, surname first. A dash in the price column means the filing reports none, as in grants and gifts.

How to read the table

Only open-market purchases and sales are trades the insider chose to make at the market price, and they are the ones counted in the summary above. Grants, option exercises and shares withheld for tax come from pay plans. A sale marked as a 10b5-1 plan was scheduled in advance under a written plan.

Where each row comes from

From the Form 4 that each executive, director or large shareholder must file with the SEC within two business days of a transaction, read up to 10 November 2026. Each row links to its filing on EDGAR. Only transactions in shares are listed, not derivatives, and amended filings are left out. The accounts of the company are on the Amentum page; the method, in data sources.

Information prepared from the Form 4 filings submitted to the SEC, for information purposes only. It is not financial advice or a recommendation to buy or sell. Updated on 12 November 2026.