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Data sources

Public disclosures only. Scores flag unusual patterns and are not evidence of wrongdoing. Not investment advice.

RH CHAIN…
OverviewDaily BriefLiveCongressCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenMethodologyMatch reviewLaunch readiness
01Overview02Daily Brief03Live04Congress05Corporate Insiders06Government Money07Political Influence08Institutions09Washington Network10Follow the Power11Disclosure Clock12AI Investigator13Watchlist
ConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenMethodologyMatch reviewLaunch readiness
OverviewDaily BriefLiveCongressCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenMethodologyMatch reviewLaunch readiness
Data sources
SEC FORM 45h ago
HOUSE PTR5h ago
SEC 13F5h ago
ROBINHOOD CHAIN5h ago
SEC FORM 4/Option exerciseVerified data

Mullen Sean Thomas reported AMTM

Chief Growth Officer · Amentum Holdings, Inc. · Common Stock

Side
M
Value
—
Shares
9,072
Price
—
Executed
May 6, 2026
Disclosed
May 7, 2026
Disclosure timeline1 days from execution to publication · legal deadline 2 business days
May 6 executedMay 7, 2026 disclosed

AMTM · daily

Yahoo Finance chart API
▲Execution▼Disclosure●Material company filing●Other disclosed buy●Other disclosed sellUnofficial public endpoint; daily OHLCV, split-adjusted. Replace with a licensed feed for production.

Insider Score

Experimental signal
17/ 100 · ROUTINE
Methodology →
  • Transaction type0 / 20

    Option exercise — administrative, little informational value

  • Relative size+9 / 25

No reported dollar value · 34.7% of prior position

  • Filing timing0 / 15

    Disclosed 1 business day after execution (deadline: 2)

  • Historical behavior+8 / 15

    First recorded trade by this actor in this security

  • Frequency & clustering0 / 15

    No clustered activity in the dataset

  • Market events0 / 10

    No material company filing within 60 days after the trade

    • The Insider Score measures how far a disclosure deviates from normal filing patterns. A high score is a prompt for research, not evidence of illegal insider trading.

    Other disclosed activity · AMTM

    ScoreActorSecuritySideValueExecutedDisclosedLagSourceEvidence
    9
    HE
    Heller John E.Director, Chief Executive Officer
    AMTMAmentum Holdings, Inc.
    Option exercise
    		M—
    18.1K sh
    		May 6, 2026May 7, 2026
    traded May 6, 2026
    		+1dSEC FORM 4

    Evidence

    12
    HE
    Heller John E.Director, Chief Executive Officer
    AMTMAmentum Holdings, Inc.
    Tax withholding
    		F$204K
    8,184 sh
    		May 6, 2026May 7, 2026
    traded May 6, 2026
    		+1dSEC FORM 4

    Evidence

    21
    HE
    Heller John E.Director, Chief Executive Officer
    AMTMAmentum Holdings, Inc.
    Option exercise
    		M—
    18.1K sh
    		May 6, 2026May 7, 2026
    traded May 6, 2026
    		+1dSEC FORM 4

    Evidence

    16
    MT
    Mullen Sean ThomasChief Growth Officer
    AMTMAmentum Holdings, Inc.
    Tax withholding
    		F$69K
    2,762 sh
    		May 6, 2026May 7, 2026
    traded May 6, 2026
    		+1dSEC FORM 4

    Evidence

    21
    MT
    Mullen Sean ThomasChief Growth Officer
    AMTMAmentum Holdings, Inc.
    Option exercise
    		M—
    9,072 sh
    		May 6, 2026May 7, 2026
    traded May 6, 2026
    		+1dSEC FORM 4

    Evidence

    13
    JB
    Johnson Travis BartonChief Financial Officer
    AMTMAmentum Holdings, Inc.
    Option exercise
    		M—
    13.6K sh
    		May 6, 2026May 7, 2026
    traded May 6, 2026
    		+1dSEC FORM 4

    Evidence

    12
    JB
    Johnson Travis BartonChief Financial Officer
    AMTMAmentum Holdings, Inc.
    Tax withholding
    		F$102K
    4,097 sh
    		May 6, 2026May 7, 2026
    traded May 6, 2026
    		+1dSEC FORM 4

    Evidence

    9
    JB
    Johnson Travis BartonChief Financial Officer
    AMTMAmentum Holdings, Inc.
    Option exercise
    		M—
    13.6K sh
    		May 6, 2026May 7, 2026
    traded May 6, 2026
    		+1dSEC FORM 4

    Evidence

    9
    BL
    Bruning Jill LChief Technology Officer
    AMTMAmentum Holdings, Inc.
    Option exercise
    		M—
    9,072 sh
    		May 6, 2026May 7, 2026
    traded May 6, 2026
    		+1dSEC FORM 4

    Evidence

    12
    BL
    Bruning Jill LChief Technology Officer
    AMTMAmentum Holdings, Inc.
    Tax withholding
    		F$68K
    2,731 sh
    		May 6, 2026May 7, 2026
    traded May 6, 2026
    		+1dSEC FORM 4

    Evidence

    21
    BL
    Bruning Jill LChief Technology Officer
    AMTMAmentum Holdings, Inc.
    Option exercise
    		M—
    9,072 sh
    		May 6, 2026May 7, 2026
    traded May 6, 2026
    		+1dSEC FORM 4

    Evidence

    13
    AA
    Arnette Stephen AChief Operating Officer
    AMTMAmentum Holdings, Inc.
    Option exercise
    		M—
    13.6K sh
    		May 6, 2026May 7, 2026
    traded May 6, 2026
    		+1dSEC FORM 4

    Evidence

    12
    AA
    Arnette Stephen AChief Operating Officer
    AMTMAmentum Holdings, Inc.
    Tax withholding
    		F$82K
    3,314 sh
    		May 6, 2026May 7, 2026
    traded May 6, 2026
    		+1dSEC FORM 4

    Evidence

    9
    AA
    Arnette Stephen AChief Operating Officer
    AMTMAmentum Holdings, Inc.
    Option exercise
    		M—
    13.6K sh
    		May 6, 2026May 7, 2026
    traded May 6, 2026
    		+1dSEC FORM 4

    Evidence

    Evidence

    Verified data

    Read directly from the primary public document; every field below is as reported by the filer.

    Source

    Document
    SEC Form 4
    Publisher
    U.S. Securities and Exchange Commission (EDGAR)
    Document ID
    0002011286-26-000020
    Machine-readable
    Structured copy

    Timestamps

    Event (reported)
    May 6, 2026
    Published
    May 7, 2026
    Ingested by INSIDER
    Nov 5, 04:00 UTC
    Last re-read
    Nov 5, 04:00 UTC

    Extracted facts

    Filer
    Mullen Sean Thomas
    Role
    Chief Growth Officer
    Transaction
    Option exerciseAs filed: “M”
    Asset
    Amentum Holdings, Inc.
    Ticker
    AMTM
    Shares
    9,072
    Execution date (reported)
    May 6, 2026
    Owned after transaction
    35.2K shares
    Days from execution to publication
    1

    What this establishes

    Mullen Sean Thomas filed this Form 4 reporting a option exercise of AMTM on May 6, 2026. It became public on May 7, 2026. The filing establishes the reported transaction and the filer's stated role. It does not establish why the trade was made or what the filer knew.

    Extraction

    Method
    Form 4 XML
    Confidence
    1.00
    Chief Growth Officer
    Mullen Sean Thomascik:0002034388
    Issuer
    Amentum Holdings, Inc.cik:0002011286

    Revision history · 0

    No field has changed since this record was first ingested.

    Company events

    No records

    No material filings recorded for this issuer.