INSIDER
01Overview02Follow the Money03Daily Brief04Live05Congress06Directory07Corporate Insiders08Government Money09Political Influence10Institutions11Washington Network12Follow the Power13Disclosure Clock14AI Investigator15Watchlist
ConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodology
Data sources

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

RH CHAIN…
OverviewFollow the MoneyDaily BriefLiveCongressDirectoryCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodology
01Overview02Follow the Money03Daily Brief04Live05Congress06Directory07Corporate Insiders08Government Money09Political Influence10Institutions11Washington Network12Follow the Power13Disclosure Clock14AI Investigator15Watchlist
ConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodology
OverviewFollow the MoneyDaily BriefLiveCongressDirectoryCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodology
Data sources
SEC FORM 428m ago
HOUSE PTR28m ago
SEC 13F28m ago
ROBINHOOD CHAIN28m ago
SEC FORM 4/Option exerciseVerified dataRule 10b5-1 plan

Gallagher Thomas P. reported MIAX

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

Side
M
Value
$189K
Shares
15.8K
Price
$12
Executed
May 5, 2026
Disclosed
May 7, 2026
Disclosure timeline2 days from execution to publication · legal deadline 2 business days
May 5 executedMay 7, 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
2/ 100 · ROUTINE
Methodology →
  • Transaction type0 / 20

    Option exercise — administrative, little informational value

  • Relative size+4 / 25

    $189K reported value · 0.9% 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

  • Pre-arranged plan-10

    Executed under a Rule 10b5-1 trading plan

    • 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
    7
    SM
    Schafer Douglas M. JREVP and CIO
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Option exercise · 10b5-1 plan
    		M—
    40.0K sh
    		Nov 3, 2026Nov 5, 2026
    traded Nov 3, 2026
    		+2dSEC 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
    		Nov 4, 2026Nov 5, 2026
    traded Nov 4, 2026
    		+1dSEC FORM 4

    Evidence

    0
    SM
    Schafer Douglas M. JREVP and CIO
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Option exercise · 10b5-1 plan
    		M—
    8,000 sh
    		Nov 4, 2026Nov 5, 2026
    traded Nov 4, 2026
    		+1dSEC FORM 4

    Evidence

    5
    SM
    Schafer Douglas M. JREVP and CIO
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Option exercise · 10b5-1 plan
    		M$480K
    40.0K sh
    		Nov 3, 2026Nov 5, 2026
    traded Nov 3, 2026
    		+2dSEC FORM 4

    Evidence

    19
    SM
    Schafer Douglas M. JREVP and CIO
    MIAXMIAMI INTERNATIONAL HOLDINGS, INC.
    Open-market sale · 10b5-1 plan
    		SELL$1.36M
    40.0K sh
    		Nov 3, 2026Nov 5, 2026
    traded Nov 3, 2026
    		+2dSEC 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
    		Nov 4, 2026Nov 5, 2026
    traded Nov 4, 2026
    		+1dSEC 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

    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

    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

    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

    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

    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

    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

    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
    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

    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
    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

    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
    0002080477-26-000006
    Machine-readable
    Structured copy

    Timestamps

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

    Extracted facts

    Filer
    Gallagher Thomas P.
    Role
    Director, Chairman & CEO
    Transaction
    Option exerciseAs filed: “M”
    Asset
    MIAMI INTERNATIONAL HOLDINGS, INC.
    Ticker
    MIAX
    Shares
    15.8K
    Price per share
    $12
    Value
    $189,252
    Execution date (reported)
    May 5, 2026
    Owned after transaction
    1.74M shares
    Rule 10b5-1 plan
    Yes, as checked by the filer
    Days from execution to publication
    2

    Calculation

    Value = shares × reported price per share

    • Shares: 15.8K
    • Price: $12

    = $189,252

    What this establishes

    Gallagher Thomas P. filed this Form 4 reporting a option exercise of MIAX on May 5, 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
    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.