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AMTMAmentum Holdings, Inc.

Market cap
$5.32B
as of 2026-10-23
Latest close
$21.76
as of 2026-10-23
Sector
Industrials
as of 2026-10-24
Industry
Specialty Business Services
as of 2026-10-24

Cluster

No cluster in the last 90 days under the default rule (14d · ≥2 insiders · all roles).

Form 4 historysince 2024-09-25

InsiderTradedFiledTypeSharesPriceValueOwned after10b5-1 planFiling
Thompson Christopher M.T.Aug 14Sep 17G4,250$0.00$05,750NoForm 4
Arnette Stephen AChief Operating OfficerMay 6May 7M13,609not reportednot reported109,966NoForm 4
Arnette Stephen AChief Operating OfficerMay 6May 7F3,314$24.89$82,485106,652NoForm 4
Arnette Stephen AChief Operating OfficerMay 6May 7M · derivative13,609$0.00$013,609NoForm 4
Bruning Jill LChief Technology OfficerMay 6May 7M9,072not reportednot reported200,188NoForm 4
Bruning Jill LChief Technology OfficerMay 6May 7F2,731$24.89$67,975197,457NoForm 4
Bruning Jill LChief Technology OfficerMay 6May 7M · derivative9,072$0.00$09,073NoForm 4
Johnson Travis BartonChief Financial OfficerMay 6May 7M13,609not reportednot reported122,284NoForm 4
Johnson Travis BartonChief Financial OfficerMay 6May 7F4,097$24.89$101,974118,187NoForm 4
Johnson Travis BartonChief Financial OfficerMay 6May 7M · derivative13,609$0.00$013,609NoForm 4
Mullen Sean ThomasChief Growth OfficerMay 6May 7M9,072not reportednot reported35,210NoForm 4
Mullen Sean ThomasChief Growth OfficerMay 6May 7F2,762$24.89$68,74632,448NoForm 4
Mullen Sean ThomasChief Growth OfficerMay 6May 7M · derivative9,072$0.00$09,073NoForm 4
Heller John E.Chief Executive OfficerMay 6May 7M18,145not reportednot reported384,203NoForm 4
Heller John E.Chief Executive OfficerMay 6May 7F8,184$24.89$203,700376,019NoForm 4
Heller John E.Chief Executive OfficerMay 6May 7M · derivative18,145$0.00$018,146NoForm 4
Bruning Jill LChief Technology OfficerMar 4Mar 5G30,000$0.00$0190,999NoForm 4
Arnette Stephen AChief Operating OfficerMar 2Mar 4M2,808not reportednot reported97,107NoForm 4
Arnette Stephen AChief Operating OfficerMar 2Mar 4F750$30.70$23,02596,357NoForm 4
Arnette Stephen AChief Operating OfficerMar 2Mar 4M · derivative2,808$0.00$0not reportedNoForm 4
St. Mary Michele TChief Legal Officer & GCFeb 17Feb 18M7,080not reportednot reported29,351NoForm 4
St. Mary Michele TChief Legal Officer & GCFeb 17Feb 18F2,308$30.05$69,35527,043NoForm 4
St. Mary Michele TChief Legal Officer & GCFeb 17Feb 18M · derivative7,080$0.00$014,162NoForm 4
Vollmer John C.Feb 6Feb 10M11,564not reportednot reported424,780NoForm 4
Vollmer John C.Feb 6Feb 10A5,062$0.00$0429,842NoForm 4
Vollmer John C.Feb 6Feb 10M · derivative11,564$0.00$0not reportedNoForm 4
Thompson Christopher M.T.Feb 6Feb 10A5,062$0.00$05,062NoForm 4
Loughran BarbaraFeb 6Feb 10A5,062$0.00$09,662NoForm 4
Eberhart Ralph EFeb 6Feb 10M11,564not reportednot reported43,058NoForm 4
Eberhart Ralph EFeb 6Feb 10A5,062$0.00$048,120NoForm 4
Eberhart Ralph EFeb 6Feb 10M · derivative11,564$0.00$0not reportedNoForm 4
Brooks Vincent KFeb 6Feb 10M11,564not reportednot reported22,400NoForm 4
Brooks Vincent KFeb 6Feb 10A5,062$0.00$027,462NoForm 4
Brooks Vincent KFeb 6Feb 10M · derivative11,564$0.00$0not reportedNoForm 4
Rowland Sandra E.Feb 6Feb 10M11,564not reportednot reported15,011NoForm 4
Rowland Sandra E.Feb 6Feb 10A5,062$0.00$020,073NoForm 4
Rowland Sandra E.Feb 6Feb 10M · derivative11,564$0.00$0not reportedNoForm 4
Ireland Susan LeslieFeb 6Feb 10A5,062$0.00$08,509NoForm 4
Heller John E.Chief Executive OfficerJan 28Jan 29M51,979not reportednot reported385,826NoForm 4
Heller John E.Chief Executive OfficerJan 28Jan 29F19,768$35.71$705,915366,058NoForm 4
Heller John E.Chief Executive OfficerJan 28Jan 29M · derivative51,979$0.00$0103,959NoForm 4
Mullen Sean ThomasChief Growth OfficerDec 17, 2025Dec 19, 2025M9,298not reportednot reported30,332NoForm 4
Mullen Sean ThomasChief Growth OfficerDec 17, 2025Dec 19, 2025F4,194$28.67$120,24226,138NoForm 4
Mullen Sean ThomasChief Growth OfficerDec 17, 2025Dec 19, 2025M · derivative9,298$0.00$0not reportedNoForm 4
Burton DarrenChief People OfficerDec 5, 2025Dec 9, 2025M2,721not reportednot reported24,992NoForm 4
Burton DarrenChief People OfficerDec 5, 2025Dec 9, 2025F1,392$28.88$40,20123,600NoForm 4
Burton DarrenChief People OfficerDec 5, 2025Dec 9, 2025M · derivative2,721$0.00$05,444NoForm 4
Demetriou Steven J.Executive ChairNov 17, 2025Nov 19, 2025M43,396not reportednot reported726,198NoForm 4
Demetriou Steven J.Executive ChairNov 17, 2025Nov 19, 2025F17,077$21.49$366,985709,121NoForm 4
Demetriou Steven J.Executive ChairNov 17, 2025Nov 19, 2025A111,355$0.00$0820,476NoForm 4
Demetriou Steven J.Executive ChairNov 17, 2025Nov 19, 2025M · derivative43,396$0.00$0not reportedNoForm 4
St. Mary Michele TChief Legal Officer & GCNov 17, 2025Nov 19, 2025A22,271$0.00$022,271NoForm 4
Johnson Travis BartonChief Financial OfficerNov 17, 2025Nov 19, 2025A100,220$0.00$0108,675NoForm 4
Burton DarrenChief People OfficerNov 17, 2025Nov 19, 2025A22,271$0.00$022,271NoForm 4
Mullen Sean ThomasChief Growth OfficerNov 17, 2025Nov 19, 2025A17,817$0.00$021,034NoForm 4
Arnette Stephen AChief Operating OfficerNov 16, 2025Nov 18, 2025M5,053not reportednot reported41,036NoForm 4
Arnette Stephen AChief Operating OfficerNov 16, 2025Nov 18, 2025F1,231$22.07$27,16839,805NoForm 4
Arnette Stephen AChief Operating OfficerNov 16, 2025Nov 18, 2025M3,681not reportednot reported43,486NoForm 4
Arnette Stephen AChief Operating OfficerNov 16, 2025Nov 18, 2025F897$22.07$19,79742,589NoForm 4
Arnette Stephen AChief Operating OfficerNov 16, 2025Nov 18, 2025M4,596not reportednot reported47,185NoForm 4
Arnette Stephen AChief Operating OfficerNov 16, 2025Nov 18, 2025F1,120$22.07$24,71846,065NoForm 4
Arnette Stephen AChief Operating OfficerNov 16, 2025Nov 18, 2025M · derivative5,053$0.00$05,053NoForm 4
Arnette Stephen AChief Operating OfficerNov 16, 2025Nov 18, 2025M · derivative3,681$0.00$0not reportedNoForm 4
Arnette Stephen AChief Operating OfficerNov 16, 2025Nov 18, 2025M · derivative4,596$0.00$0not reportedNoForm 4
Arnette Stephen AChief Operating OfficerNov 15, 2025Nov 18, 2025M5,758not reportednot reported37,386NoForm 4
Arnette Stephen AChief Operating OfficerNov 15, 2025Nov 18, 2025F1,403$22.07$30,96435,983NoForm 4
Arnette Stephen AChief Operating OfficerNov 15, 2025Nov 18, 2025M · derivative5,758$0.00$011,515NoForm 4
Arnette Stephen AChief Operating OfficerNov 6, 2025Nov 10, 2025M12,701not reportednot reported34,721NoForm 4
Arnette Stephen AChief Operating OfficerNov 6, 2025Nov 10, 2025F3,093$21.79$67,39631,628NoForm 4
Arnette Stephen AChief Operating OfficerNov 6, 2025Nov 10, 2025M · derivative12,701$0.00$025,404NoForm 4
Mullen Sean ThomasChief Growth OfficerNov 6, 2025Nov 10, 2025M4,838not reportednot reported4,838NoForm 4
Mullen Sean ThomasChief Growth OfficerNov 6, 2025Nov 10, 2025F1,621$21.79$35,3223,217NoForm 4
Mullen Sean ThomasChief Growth OfficerNov 6, 2025Nov 10, 2025M · derivative4,838$0.00$09,678NoForm 4
Heller John E.Chief Executive OfficerNov 6, 2025Nov 10, 2025M39,617not reportednot reported131,411NoForm 4
Heller John E.Chief Executive OfficerNov 6, 2025Nov 10, 2025F17,868$21.79$389,344113,543NoForm 4
Heller John E.Chief Executive OfficerNov 6, 2025Nov 10, 2025M · derivative39,617$0.00$079,236NoForm 4
Bruning Jill LChief Technology OfficerNov 6, 2025Nov 10, 2025M4,838not reportednot reported4,838NoForm 4
Bruning Jill LChief Technology OfficerNov 6, 2025Nov 10, 2025F1,457$21.79$31,7483,381NoForm 4
Bruning Jill LChief Technology OfficerNov 6, 2025Nov 10, 2025M · derivative4,838$0.00$09,678NoForm 4
Johnson Travis BartonChief Financial OfficerNov 6, 2025Nov 10, 2025M12,097not reportednot reported12,097NoForm 4
Johnson Travis BartonChief Financial OfficerNov 6, 2025Nov 10, 2025F3,642$21.79$79,3598,455NoForm 4
Johnson Travis BartonChief Financial OfficerNov 6, 2025Nov 10, 2025M · derivative12,097$0.00$024,194NoForm 4
Amentum Joint Venture LPMay 8, 2025May 12, 2025J2,433,022$0.00$0not reportedNoForm 4
Lindsay Goldberg IV L.P.May 8, 2025May 12, 2025J1,132,839not reportednot reported45,026,743NoForm 4
Goldberg Alan EMay 8, 2025May 12, 2025J1,132,839not reportednot reported45,026,743NoForm 4
Lindsay Goldberg V L.P.May 8, 2025May 12, 2025J1,132,839not reportednot reported45,026,743NoForm 4
Thompson Christopher M.T.Apr 8, 2025Apr 10, 2025A · derivative11,564$0.00$011,564NoForm 4
Rowland Sandra E.Apr 8, 2025Apr 10, 2025A · derivative11,564$0.00$011,564NoForm 4
Ireland Susan LeslieApr 8, 2025Apr 10, 2025A · derivative11,564$0.00$011,564NoForm 4
Loughran BarbaraApr 8, 2025Apr 10, 2025A · derivative11,564$0.00$011,564NoForm 4
Eberhart Ralph EApr 8, 2025Apr 10, 2025A · derivative11,564$0.00$011,564NoForm 4
Brooks Vincent KApr 8, 2025Apr 10, 2025A · derivative11,564$0.00$011,564NoForm 4
Vollmer John C.Apr 8, 2025Apr 10, 2025A · derivative11,564$0.00$011,564NoForm 4
Amentum Joint Venture GP LLCApr 7, 2025Apr 8, 2025A2,433,022$0.00$02,433,022NoForm 4
St. Mary Michele TChief Legal Officer & GCMar 17, 2025Mar 19, 2025A · derivative21,242$0.00$021,242NoForm 4
Jacobs Engineering Group Inc /De/Mar 13, 2025Mar 17, 2025J19,464,174not reportednot reportednot reportedNoForm 4
Eberhart Ralph EMar 5, 2025Mar 7, 2025M3,447not reportednot reported29,886NoForm 4
Eberhart Ralph EMar 5, 2025Mar 7, 2025M · derivative3,447$0.00$0not reportedNoForm 4
Rowland Sandra E.Mar 5, 2025Mar 7, 2025M3,447not reportednot reported3,447NoForm 4
Rowland Sandra E.Mar 5, 2025Mar 7, 2025M · derivative3,447$0.00$0not reportedNoForm 4
Brooks Vincent KMar 5, 2025Mar 7, 2025M3,447not reportednot reported10,413NoForm 4
Brooks Vincent KMar 5, 2025Mar 7, 2025M · derivative3,447$0.00$0not reportedNoForm 4
Vollmer John C.Mar 5, 2025Mar 7, 2025M3,447not reportednot reported394,788NoForm 4
Vollmer John C.Mar 5, 2025Mar 7, 2025M · derivative3,447$0.00$0not reportedNoForm 4
Ireland Susan LeslieMar 5, 2025Mar 7, 2025M3,447not reportednot reported3,447NoForm 4
Ireland Susan LeslieMar 5, 2025Mar 7, 2025M · derivative3,447$0.00$0not reportedNoForm 4
Vollmer John C.Dec 17, 2024Mar 7, 2025J391,341not reportednot reported391,341NoForm 4
Eberhart Ralph ESep 18, 2024Mar 7, 2025J26,439not reportednot reported26,439NoForm 4
Brooks Vincent KSep 18, 2024Mar 7, 2025J6,966not reportednot reported6,966NoForm 4
Arnette Stephen AChief Operating OfficerMar 4, 2025Mar 5, 2025M521not reportednot reported22,172NoForm 4
Arnette Stephen AChief Operating OfficerMar 4, 2025Mar 5, 2025F152$18.71$2,84422,020NoForm 4
Arnette Stephen AChief Operating OfficerMar 4, 2025Mar 5, 2025M · derivative521$0.00$0not reportedNoForm 4
Arnette Stephen AChief Operating OfficerMar 3, 2025Mar 5, 2025M1,230not reportednot reported22,016NoForm 4
Arnette Stephen AChief Operating OfficerMar 3, 2025Mar 5, 2025F365$19.64$7,16921,651NoForm 4
Arnette Stephen AChief Operating OfficerMar 3, 2025Mar 5, 2025M · derivative1,230$0.00$02,808NoForm 4
Arnette Stephen AChief Operating OfficerSep 18, 2024Mar 5, 2025J20,786not reportednot reported20,786NoForm 4
Loughran BarbaraFeb 18, 2025Feb 20, 2025P4,600$21.23Purchase +$97,6584,600NoForm 4
Demetriou Steven J.Executive ChairFeb 12, 2025Feb 14, 2025P100,000$20.81Purchase +$2,081,000620,893NoForm 4
Demetriou Steven J.Executive ChairSep 18, 2024Feb 14, 2025J520,893not reportednot reported520,893NoForm 4
Heller John E.Chief Executive OfficerJan 28, 2025Jan 30, 2025A · derivative1,373,955$22.71$31,202,5181,373,955NoForm 4
Heller John E.Chief Executive OfficerJan 28, 2025Jan 30, 2025A · derivative155,938$0.00$0155,938NoForm 4
Heller John E.Chief Executive OfficerDec 17, 2024Jan 30, 2025J91,794not reportednot reported91,794NoForm 4
Goldberg Alan EDec 17, 2024Dec 27, 2024J43,893,904not reportednot reported43,893,904NoForm 4
Mullen Sean ThomasChief Growth OfficerDec 20, 2024Dec 23, 2024A · derivative9,298$0.00$09,298NoForm 4
Amentum Joint Venture GP LLCDec 17, 2024Dec 19, 2024J90,021,804$0.00$0not reportedNoForm 4
Burton DarrenChief People OfficerDec 5, 2024Dec 9, 2024A · derivative8,165$0.00$08,165NoForm 4
Rowland Sandra E.Nov 6, 2024Nov 8, 2024A · derivative3,447$0.00$03,447NoForm 4
Johnson Travis BartonChief Financial OfficerNov 6, 2024Nov 8, 2024A · derivative27,218$0.00$027,218NoForm 4
Johnson Travis BartonChief Financial OfficerNov 6, 2024Nov 8, 2024A · derivative36,291$0.00$036,291NoForm 4
Vollmer John C.Nov 6, 2024Nov 8, 2024A · derivative3,447$0.00$03,447NoForm 4
Bruning Jill LChief Technology OfficerNov 6, 2024Nov 8, 2024A · derivative18,145$0.00$018,145NoForm 4
Bruning Jill LChief Technology OfficerNov 6, 2024Nov 8, 2024A · derivative14,516$0.00$014,516NoForm 4
Arnette Stephen AChief Operating OfficerNov 6, 2024Nov 8, 2024A · derivative27,218$0.00$027,218NoForm 4
Arnette Stephen AChief Operating OfficerNov 6, 2024Nov 8, 2024A · derivative38,105$0.00$038,105NoForm 4
Brooks Vincent KNov 6, 2024Nov 8, 2024A · derivative3,447$0.00$03,447NoForm 4
Ireland Susan LeslieNov 6, 2024Nov 8, 2024A · derivative3,447$0.00$03,447NoForm 4
Eberhart Ralph ENov 6, 2024Nov 8, 2024A · derivative3,447$0.00$03,447NoForm 4
Thompson Christopher M.T.Nov 6, 2024Nov 8, 2024A · derivative3,447$0.00$03,447NoForm 4
Demetriou Steven J.Executive ChairNov 6, 2024Nov 8, 2024A · derivative90,727$0.00$090,727NoForm 4
Mullen Sean ThomasChief Growth OfficerNov 6, 2024Nov 8, 2024A · derivative18,145$0.00$018,145NoForm 4
Mullen Sean ThomasChief Growth OfficerNov 6, 2024Nov 8, 2024A · derivative14,516$0.00$014,516NoForm 4
Young Stuart IraChief Legal OfficerNov 6, 2024Nov 8, 2024A · derivative3,629$0.00$03,629NoForm 4
Loughran BarbaraNov 6, 2024Nov 8, 2024A · derivative3,447$0.00$03,447NoForm 4
Heller John E.Chief Executive OfficerNov 6, 2024Nov 8, 2024A · derivative36,291$0.00$036,291NoForm 4
Heller John E.Chief Executive OfficerNov 6, 2024Nov 8, 2024A · derivative118,853$0.00$0118,853NoForm 4
Arnette Stephen AChief Operating OfficerOct 2, 2024Oct 4, 2024A · derivative521$0.00$0521NoForm 4
Arnette Stephen AChief Operating OfficerOct 2, 2024Oct 4, 2024A · derivative1,178$0.00$01,178NoForm 4
Arnette Stephen AChief Operating OfficerOct 2, 2024Oct 4, 2024A · derivative4,038$0.00$04,038NoForm 4
Arnette Stephen AChief Operating OfficerOct 2, 2024Oct 4, 2024A · derivative10,106$0.00$010,106NoForm 4
Arnette Stephen AChief Operating OfficerOct 2, 2024Oct 4, 2024A · derivative17,273$0.00$017,273NoForm 4
Arnette Stephen AChief Operating OfficerOct 2, 2024Oct 4, 2024A · derivative3,681$0.00$03,681NoForm 4
Arnette Stephen AChief Operating OfficerOct 2, 2024Oct 4, 2024A · derivative4,596$0.00$04,596NoForm 4
Arnette Stephen AChief Operating OfficerOct 2, 2024Oct 4, 2024A · derivative10,984$0.00$010,984NoForm 4
Arnette Stephen AChief Operating OfficerOct 2, 2024Oct 4, 2024A · derivative10,395$0.00$010,395NoForm 4
Demetriou Steven J.Executive ChairOct 2, 2024Oct 4, 2024A · derivative43,396$0.00$043,396NoForm 4
Jacobs Solutions Inc.Sep 23, 2024Sep 25, 2024J124,084,108$0.00$029,196,261NoForm 4