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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 453m ago
HOUSE PTR53m ago
SEC 13F52m ago
ROBINHOOD CHAIN52m ago
SEC FORM 4/Tax withholdingVerified data

Gallagher Thomas P. reported MIAX

Director, Chairman & CEO · MIAMI INTERNATIONAL HOLDINGS, INC. · Common Stock

Side
F
Value
$2.07M
Shares
50.1K
Price
$41.33
Executed
Feb 10, 2026
Disclosed
Feb 12, 2026
Disclosure timeline2 days from execution to publication · legal deadline 2 business days
Feb 10 executedFeb 12, 2026 disclosed

MIAX · 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
22/ 100 · ROUTINE
Methodology →
  • Transaction type0 / 20

    Tax withholding — administrative, little informational value

  • Relative size+14 / 25

$2.1M reported value · 10.3% 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 · MIAX

    ScoreActorSecuritySideValueExecutedDisclosedLagSourceEvidence
    5
    CJ
    Comly Barbara J.EVP, GC & Corporate Secretary
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Option exercise · 10b5-1 plan
    		M$567K
    47.2K sh
    		Nov 4, 2026Nov 4, 2026
    traded Nov 4, 2026
    		+0dSEC FORM 4

    Evidence

    0
    CJ
    Comly Barbara J.EVP, GC & Corporate Secretary
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Option exercise · 10b5-1 plan
    		M—
    23.3K sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    0
    CJ
    Comly Barbara J.EVP, GC & Corporate Secretary
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Option exercise · 10b5-1 plan
    		M$106K
    8,799 sh
    		Nov 4, 2026Nov 4, 2026
    traded Nov 4, 2026
    		+0dSEC FORM 4

    Evidence

    7
    CJ
    Comly Barbara J.EVP, GC & Corporate Secretary
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Option exercise · 10b5-1 plan
    		M—
    47.2K sh
    		Nov 4, 2026Nov 4, 2026
    traded Nov 4, 2026
    		+0dSEC FORM 4

    Evidence

    0
    CJ
    Comly Barbara J.EVP, GC & Corporate Secretary
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Option exercise · 10b5-1 plan
    		M—
    8,799 sh
    		Nov 4, 2026Nov 4, 2026
    traded Nov 4, 2026
    		+0dSEC FORM 4

    Evidence

    1
    CJ
    Comly Barbara J.EVP, GC & Corporate Secretary
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Option exercise · 10b5-1 plan
    		M$280K
    23.3K sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    19
    CJ
    Comly Barbara J.EVP, GC & Corporate Secretary
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Open-market sale · 10b5-1 plan
    		SELL$1.96M
    56.0K sh
    		Nov 4, 2026Nov 4, 2026
    traded Nov 4, 2026
    		+0dSEC FORM 4

    Evidence

    12
    CJ
    Comly Barbara J.EVP, GC & Corporate Secretary
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Open-market sale · 10b5-1 plan
    		SELL$819K
    23.3K sh
    		Nov 2, 2026Nov 4, 2026
    traded Nov 2, 2026
    		+2dSEC FORM 4

    Evidence

    0
    SM
    Schafer Douglas M. JREVP and CIO
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Option exercise · 10b5-1 plan
    		M—
    8,000 sh
    		Oct 22, 2026Oct 26, 2026
    traded Oct 22, 2026
    		+4dSEC FORM 4

    Evidence

    12
    SM
    Schafer Douglas M. JREVP and CIO
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Open-market sale · 10b5-1 plan
    		SELL$280K
    8,000 sh
    		Oct 22, 2026Oct 26, 2026
    traded Oct 22, 2026
    		+4dSEC FORM 4

    Evidence

    12
    CJ
    Comly Barbara J.EVP, GC & Corporate Secretary
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Open-market sale · 10b5-1 plan
    		SELL$431K
    12.3K sh
    		Oct 22, 2026Oct 26, 2026
    traded Oct 22, 2026
    		+4dSEC FORM 4

    Evidence

    7
    CJ
    Comly Barbara J.EVP, GC & Corporate Secretary
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Option exercise · 10b5-1 plan
    		M—
    12.3K sh
    		Oct 22, 2026Oct 26, 2026
    traded Oct 22, 2026
    		+4dSEC FORM 4

    Evidence

    0
    SM
    Schafer Douglas M. JREVP and CIO
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Option exercise · 10b5-1 plan
    		M$96K
    8,000 sh
    		Oct 22, 2026Oct 26, 2026
    traded Oct 22, 2026
    		+4dSEC FORM 4

    Evidence

    0
    CJ
    Comly Barbara J.EVP, GC & Corporate Secretary
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Option exercise · 10b5-1 plan
    		M$148K
    12.3K sh
    		Oct 22, 2026Oct 26, 2026
    traded Oct 22, 2026
    		+4dSEC FORM 4

    Evidence

    5
    JH
    Jayabalan HarishEVP, CISO and CRO
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Option exercise
    		M—
    8,333 sh
    		Sep 25, 2026Sep 29, 2026
    traded Sep 25, 2026
    		+4dSEC FORM 4

    Evidence

    12
    JH
    Jayabalan HarishEVP, CISO and CRO
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Option exercise
    		M$100K
    8,333 sh
    		Sep 25, 2026Sep 29, 2026
    traded Sep 25, 2026
    		+4dSEC FORM 4

    Evidence

    23
    BS
    Brown ShellyEVP, Chief Strategy Officer
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Open-market sale · 10b5-1 plan
    		SELL$819K
    21.2K sh
    		Sep 16, 2026Sep 17, 2026
    traded Sep 16, 2026
    		+1dSEC FORM 4

    Evidence

    12
    BS
    Brown ShellyEVP, Chief Strategy Officer
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Tax withholding
    		F$693K
    16.3K sh
    		Sep 11, 2026Sep 11, 2026
    traded Sep 11, 2026
    		+0dSEC FORM 4

    Evidence

    7
    GP
    Gallagher Thomas P.Director, Chairman & CEO
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Option exercise · 10b5-1 plan
    		M—
    4,464 sh
    		Sep 3, 2026Sep 4, 2026
    traded Sep 3, 2026
    		+1dSEC FORM 4

    Evidence

    0
    GP
    Gallagher Thomas P.Director, Chairman & CEO
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Option exercise · 10b5-1 plan
    		M—
    16.7K sh
    		Sep 3, 2026Sep 4, 2026
    traded Sep 3, 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
    0002080477-26-000002
    Machine-readable
    Structured copy

    Timestamps

    Event (reported)
    Feb 10, 2026
    Published
    Feb 12, 2026
    Ingested by INSIDER
    Nov 5, 04:17 UTC
    Last re-read
    Nov 5, 04:17 UTC

    Extracted facts

    Filer
    Gallagher Thomas P.
    Role
    Director, Chairman & CEO
    Transaction
    Tax withholdingAs filed: “F”
    Asset
    MIAMI INTERNATIONAL HOLDINGS, INC.
    Ticker
    MIAX
    Shares
    50.1K
    Price per share
    $41.33
    Value
    $2,070,633
    Execution date (reported)
    Feb 10, 2026
    Owned after transaction
    535.9K shares
    Days from execution to publication
    2

    Calculation

    Value = shares × reported price per share

    • Shares: 50.1K
    • Price: $41.33

    = $2,070,633

    What this establishes

    Gallagher Thomas P. filed this Form 4 reporting a tax withholding of MIAX on Feb 10, 2026. It became public on Feb 12, 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
    Director, Chairman & CEO
    Gallagher Thomas P.cik:0002080477
    Issuer
    MIAMI INTERNATIONAL HOLDINGS, INC.cik:0001438472

    Revision history · 0

    No field has changed since this record was first ingested.

    Company events

    No records

    No material filings recorded for this issuer.