MetaCap

Amentum Insider Trades

NYSE: AMTMConsumer DiscretionaryBusiness ServicesUSD

19.29+0.32 (+1.69%)

At close: Oct 9, 4:00 PM ET · Delayed 15 min

Last 12 months

Purchases
0 · $0
Sales
0 · $0
Shares bought / sold
0 / 0
Net activity
Net buying $0

Amentum insider activity

Over the last 12 months, Amentum insiders reported 65 transactions on SEC Form 4: 0 open-market purchases and 0 sales. The most recent filing shows Thompson Christopher M.T. (Director) reporting a transaction in 4,250 shares on Aug 14, 2026. Insider sales are common for compensation, tax and diversification reasons, while open-market purchases are rarer; tracking both helps put AMTM's ownership changes in context.

Summary generated from market data by MetaCap's automated system. Methodology

AMTM insider transactions

Amentum insider transactions
DateInsiderTypeSharesValueFiling
Aug 14, 2026Thompson Christopher M.T.DirectorGift4,250—Form 4
May 6, 2026Arnette Stephen AChief Operating OfficerTax withholding3,314$82.49KForm 4
May 6, 2026Arnette Stephen AChief Operating OfficerOption exercise13,609—Form 4
May 6, 2026Bruning Jill LChief Technology OfficerTax withholding2,731$67.97KForm 4
May 6, 2026Bruning Jill LChief Technology OfficerOption exercise9,072—Form 4
May 6, 2026Johnson Travis BartonChief Financial OfficerTax withholding4,097$101.97KForm 4
May 6, 2026Johnson Travis BartonChief Financial OfficerOption exercise13,609—Form 4
May 6, 2026Mullen Sean ThomasChief Growth OfficerTax withholding2,762$68.75KForm 4
May 6, 2026Mullen Sean ThomasChief Growth OfficerOption exercise9,072—Form 4
May 6, 2026Heller John E.Chief Executive OfficerTax withholding8,184$203.70KForm 4
May 6, 2026Heller John E.Chief Executive OfficerOption exercise18,145—Form 4
Mar 4, 2026Bruning Jill LChief Technology OfficerGift30,000—Form 4
Mar 2, 2026Arnette Stephen AChief Operating OfficerTax withholding750$23.02KForm 4
Mar 2, 2026Arnette Stephen AChief Operating OfficerOption exercise2,808—Form 4
Feb 17, 2026St. Mary Michele TChief Legal Officer & GCTax withholding2,308$69.36KForm 4
Feb 17, 2026St. Mary Michele TChief Legal Officer & GCOption exercise7,080—Form 4
Feb 6, 2026Vollmer John C.DirectorAward5,062—Form 4
Feb 6, 2026Vollmer John C.DirectorOption exercise11,564—Form 4
Feb 6, 2026Thompson Christopher M.T.DirectorAward5,062—Form 4
Feb 6, 2026Brooks Vincent KDirectorAward5,062—Form 4
Feb 6, 2026Brooks Vincent KDirectorOption exercise11,564—Form 4
Feb 6, 2026EBERHART RALPH EDirectorAward5,062—Form 4
Feb 6, 2026EBERHART RALPH EDirectorOption exercise11,564—Form 4
Feb 6, 2026Loughran BarbaraDirectorAward5,062—Form 4
Feb 6, 2026IRELAND SUSAN LESLIEDirectorAward5,062—Form 4
Feb 6, 2026Rowland Sandra E.DirectorAward5,062—Form 4
Feb 6, 2026Rowland Sandra E.DirectorOption exercise11,564—Form 4
Jan 28, 2026Heller John E.Chief Executive OfficerTax withholding19,768$705.92KForm 4
Jan 28, 2026Heller John E.Chief Executive OfficerOption exercise51,979—Form 4
Dec 17, 2025Mullen Sean ThomasChief Growth OfficerTax withholding4,194$120.24KForm 4
Dec 17, 2025Mullen Sean ThomasChief Growth OfficerOption exercise9,298—Form 4
Dec 5, 2025Burton DarrenChief People OfficerTax withholding1,392$40.20KForm 4
Dec 5, 2025Burton DarrenChief People OfficerOption exercise2,721—Form 4
Nov 17, 2025Bruning Jill LChief Technology OfficerAward17,817—Form 4
Nov 17, 2025DEMETRIOU STEVEN J.Executive ChairAward111,355—Form 4
Nov 17, 2025DEMETRIOU STEVEN J.Executive ChairTax withholding17,077$366.98KForm 4
Nov 17, 2025DEMETRIOU STEVEN J.Executive ChairOption exercise43,396—Form 4
Nov 17, 2025Arnette Stephen AChief Operating OfficerAward46,769—Form 4
Nov 17, 2025Arnette Stephen AChief Operating OfficerTax withholding287$6.17KForm 4
Nov 17, 2025Arnette Stephen AChief Operating OfficerOption exercise1,178—Form 4
Nov 17, 2025St. Mary Michele TChief Legal Officer & GCAward22,271—Form 4
Nov 17, 2025Heller John E.Chief Executive OfficerAward155,897—Form 4
Nov 17, 2025Mullen Sean ThomasChief Growth OfficerAward17,817—Form 4
Nov 17, 2025Johnson Travis BartonChief Financial OfficerAward100,220—Form 4
Nov 17, 2025Burton DarrenChief People OfficerAward22,271—Form 4
Nov 16, 2025Arnette Stephen AChief Operating OfficerTax withholding1,120$24.72KForm 4
Nov 16, 2025Arnette Stephen AChief Operating OfficerOption exercise4,596—Form 4
Nov 16, 2025Arnette Stephen AChief Operating OfficerTax withholding897$19.80KForm 4
Nov 16, 2025Arnette Stephen AChief Operating OfficerOption exercise3,681—Form 4
Nov 16, 2025Arnette Stephen AChief Operating OfficerTax withholding1,231$27.17KForm 4
Nov 16, 2025Arnette Stephen AChief Operating OfficerOption exercise5,053—Form 4
Nov 15, 2025Arnette Stephen AChief Operating OfficerTax withholding1,403$30.96KForm 4
Nov 15, 2025Arnette Stephen AChief Operating OfficerOption exercise5,758—Form 4
Nov 6, 2025Arnette Stephen AChief Operating OfficerTax withholding3,093$67.40KForm 4
Nov 6, 2025Arnette Stephen AChief Operating OfficerOption exercise12,701—Form 4
Nov 6, 2025Heller John E.Chief Executive OfficerTax withholding17,868$389.34KForm 4
Nov 6, 2025Heller John E.Chief Executive OfficerOption exercise39,617—Form 4
Nov 6, 2025Johnson Travis BartonChief Financial OfficerTax withholding3,642$79.36KForm 4
Nov 6, 2025Johnson Travis BartonChief Financial OfficerOption exercise12,097—Form 4
Nov 6, 2025Bruning Jill LChief Technology OfficerTax withholding1,457$31.75KForm 4
Nov 6, 2025Bruning Jill LChief Technology OfficerOption exercise4,838—Form 4
Nov 6, 2025DEMETRIOU STEVEN J.Executive ChairTax withholding28,818$627.94KForm 4
Nov 6, 2025DEMETRIOU STEVEN J.Executive ChairOption exercise90,727—Form 4
Nov 6, 2025Mullen Sean ThomasChief Growth OfficerTax withholding1,621$35.32KForm 4
Nov 6, 2025Mullen Sean ThomasChief Growth OfficerOption exercise4,838—Form 4
May 8, 2025GOLDBERG ALAN EDirectorother1,132,839—Form 4
May 8, 2025Lindsay Goldberg Employee Co-Inv. IV L.P. & LG Co-Inv. A L.P. & Lindsay Goldberg V L.P. & Lindsay Goldberg Maverick Co-Inv. L.P. & LG Amentum Holdings GP LLC & LG Amentum Holdings LP10% Ownerother1,132,839—Form 4

Transaction codes follow SEC Form 4: P = open-market purchase, S = open-market sale, A = grant or award, M = option exercise, F = shares withheld for taxes. About Form 4

Related