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Data sources

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

RH CHAIN…
OverviewFollow the MoneyDaily BriefLiveCongressCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodologyMatch reviewLaunch readiness
01Overview02Follow the Money03Daily Brief04Live05Congress06Corporate Insiders07Government Money08Political Influence09Institutions10Washington Network11Follow the Power12Disclosure Clock13AI Investigator14Watchlist
ConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodologyMatch reviewLaunch readiness
OverviewFollow the MoneyDaily BriefLiveCongressCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodologyMatch reviewLaunch readiness
Data sources
SEC FORM 46h ago
HOUSE PTR6h ago
SEC 13F6h ago
ROBINHOOD CHAIN6h ago
SEC FORM 4/Tax withholdingVerified data

Martin Heather reported ATEX

Chief Marketing Officer, Chief of Staff · Anterix Inc. · Common Stock

Side
F
Value
$296K
Shares
3,465
Price
$85.44
Executed
Sep 9, 2026
Disclosed
Sep 11, 2026
Disclosure timeline2 days from execution to publication · legal deadline 2 business days
Sep 9 executedSep 11, 2026 disclosed

ATEX · 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
19/ 100 · ROUTINE
Methodology →
  • Transaction type0 / 20

    Tax withholding — administrative, little informational value

  • Relative size+11 / 25

$296K reported value · 11.1% of prior position

  • Filing timing0 / 15

    Disclosed 2 business days 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 · ATEX

    ScoreActorSecuritySideValueExecutedDisclosedLagSourceEvidence
    8
    ME
    Marquez ElenaChief Financial Officer
    ATEXAnterix Inc.
    Open-market sale · 10b5-1 plan
    		SELL$82K
    1,017 sh
    		Oct 9, 2026Oct 13, 2026
    traded Oct 9, 2026
    		+4dSEC FORM 4

    Evidence

    11
    ME
    Marquez ElenaChief Financial Officer
    ATEXAnterix Inc.
    Open-market sale · 10b5-1 plan
    		SELL$261K
    3,254 sh
    		Oct 9, 2026Oct 13, 2026
    traded Oct 9, 2026
    		+4dSEC FORM 4

    Evidence

    1
    ME
    Marquez ElenaChief Financial Officer
    ATEXAnterix Inc.
    Open-market sale · 10b5-1 plan
    		SELL$33K
    400 sh
    		Oct 9, 2026Oct 13, 2026
    traded Oct 9, 2026
    		+4dSEC FORM 4

    Evidence

    1
    ME
    Marquez ElenaChief Financial Officer
    ATEXAnterix Inc.
    Open-market sale · 10b5-1 plan
    		SELL$8,250
    100 sh
    		Oct 9, 2026Oct 13, 2026
    traded Oct 9, 2026
    		+4dSEC FORM 4

    Evidence

    1
    ME
    Marquez ElenaChief Financial Officer
    ATEXAnterix Inc.
    Open-market sale · 10b5-1 plan
    		SELL$17K
    210 sh
    		Oct 9, 2026Oct 13, 2026
    traded Oct 9, 2026
    		+4dSEC FORM 4

    Evidence

    0
    ME
    Marquez ElenaChief Financial Officer
    ATEXAnterix Inc.
    Option exercise · 10b5-1 plan
    		M—
    1,227 sh
    		Oct 9, 2026Oct 13, 2026
    traded Oct 9, 2026
    		+4dSEC FORM 4

    Evidence

    0
    ME
    Marquez ElenaChief Financial Officer
    ATEXAnterix Inc.
    Option exercise · 10b5-1 plan
    		M$49K
    1,227 sh
    		Oct 9, 2026Oct 13, 2026
    traded Oct 9, 2026
    		+4dSEC FORM 4

    Evidence

    5
    ME
    Marquez ElenaChief Financial Officer
    ATEXAnterix Inc.
    Tax withholding
    		F$40K
    473 sh
    		Oct 5, 2026Oct 6, 2026
    traded Oct 5, 2026
    		+1dSEC FORM 4

    Evidence

    12
    ME
    Marquez ElenaChief Financial Officer
    ATEXAnterix Inc.
    Tax withholding
    		F$108K
    1,325 sh
    		Sep 29, 2026Sep 29, 2026
    traded Sep 29, 2026
    		+0dSEC FORM 4

    Evidence

    35
    MH
    Martin HeatherChief Marketing Officer, Chief of Staff
    ATEXAnterix Inc.
    Open-market sale
    		SELL$679K
    8,064 sh
    		Sep 10, 2026Sep 11, 2026
    traded Sep 10, 2026
    		+1dSEC FORM 4

    Evidence

    36
    GC
    Guttman-McCabe ChristopherChief Reg & Comm Officer
    ATEXAnterix Inc.
    Open-market sale
    		SELL$503K
    5,372 sh
    		Aug 25, 2026Aug 27, 2026
    traded Aug 25, 2026
    		+2dSEC FORM 4

    Evidence

    36
    GC
    Guttman-McCabe ChristopherChief Reg & Comm Officer
    ATEXAnterix Inc.
    Open-market sale
    		SELL$723K
    7,791 sh
    		Aug 25, 2026Aug 27, 2026
    traded Aug 25, 2026
    		+2dSEC FORM 4

    Evidence

    36
    GC
    Guttman-McCabe ChristopherChief Reg & Comm Officer
    ATEXAnterix Inc.
    Open-market sale
    		SELL$695K
    7,580 sh
    		Aug 25, 2026Aug 27, 2026
    traded Aug 25, 2026
    		+2dSEC FORM 4

    Evidence

    33
    GC
    Guttman-McCabe ChristopherChief Reg & Comm Officer
    ATEXAnterix Inc.
    Open-market sale
    		SELL$244K
    2,696 sh
    		Aug 25, 2026Aug 27, 2026
    traded Aug 25, 2026
    		+2dSEC FORM 4

    Evidence

    9
    GC
    Guttman-McCabe ChristopherChief Reg & Comm Officer
    ATEXAnterix Inc.
    Option exercise
    		M—
    40.0K sh
    		Aug 25, 2026Aug 27, 2026
    traded Aug 25, 2026
    		+2dSEC FORM 4

    Evidence

    30
    GC
    Guttman-McCabe ChristopherChief Reg & Comm Officer
    ATEXAnterix Inc.
    Option exercise
    		M$1.39M
    40.0K sh
    		Aug 25, 2026Aug 27, 2026
    traded Aug 25, 2026
    		+2dSEC FORM 4

    Evidence

    26
    GC
    Guttman-McCabe ChristopherChief Reg & Comm Officer
    ATEXAnterix Inc.
    Tax withholding
    		F$1.50M
    16.6K sh
    		Aug 25, 2026Aug 27, 2026
    traded Aug 25, 2026
    		+2dSEC FORM 4

    Evidence

    8
    HW
    Heard WilliamDirector
    ATEXAnterix Inc.
    Gift
    		G—
    5,400 sh
    		Aug 19, 2026Aug 20, 2026
    traded Aug 19, 2026
    		+1dSEC FORM 4

    Evidence

    35
    HW
    Heard WilliamDirector
    ATEXAnterix Inc.
    Open-market sale
    		SELL$4.18M
    46.4K sh
    		Aug 14, 2026Aug 18, 2026
    traded Aug 14, 2026
    		+4dSEC FORM 4

    Evidence

    35
    HW
    Heard WilliamDirector
    ATEXAnterix Inc.
    Gift
    		G—
    1,887 sh
    		Dec 29, 2025Aug 7, 2026
    traded Dec 29, 2025
    		+221dSEC 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
    0002090798-26-000006
    Machine-readable
    Structured copy

    Timestamps

    Event (reported)
    Sep 9, 2026
    Published
    Sep 11, 2026
    Ingested by INSIDER
    Nov 5, 02:17 UTC
    Last re-read
    Nov 5, 02:17 UTC

    Extracted facts

    Filer
    Martin Heather
    Role
    Chief Marketing Officer, Chief of Staff
    Transaction
    Tax withholdingAs filed: “F”
    Asset
    Anterix Inc.
    Ticker
    ATEX
    Shares
    3,465
    Price per share
    $85.44
    Value
    $296,050
    Execution date (reported)
    Sep 9, 2026
    Owned after transaction
    34.8K shares
    Days from execution to publication
    2

    Calculation

    Value = shares × reported price per share

    • Shares: 3,465
    • Price: $85.44

    = $296,050

    What this establishes

    Martin Heather filed this Form 4 reporting a tax withholding of ATEX on Sep 9, 2026. It became public on Sep 11, 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 Marketing Officer, Chief of Staff
    Martin Heathercik:0002090798
    Issuer
    Anterix Inc.cik:0001304492

    Revision history · 0

    No field has changed since this record was first ingested.

    Company events

    No records

    No material filings recorded for this issuer.