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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 446m ago
HOUSE PTR45m ago
SEC 13F45m ago
ROBINHOOD CHAIN45m ago
SEC FORM 4/Tax withholdingVerified data

Smollen John reported MIAX

EVP, New Product Development · MIAMI INTERNATIONAL HOLDINGS, INC. · Common Stock

Side
F
Value
$14K
Shares
362
Price
$37.5
Executed
Mar 30, 2026
Disclosed
Apr 1, 2026
Disclosure timeline2 days from execution to publication · legal deadline 2 business days
Mar 30 executedApr 1, 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
9/ 100 · ROUTINE
Methodology →
  • Transaction type0 / 20

    Tax withholding — administrative, little informational value

  • Relative size+1 / 25

$14K reported value · 0.2% 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
    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

    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

    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

    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

    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

    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

    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

    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

    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
    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

    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

    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$106K
    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$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

    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—
    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

    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
    0002080703-26-000002
    Machine-readable
    Structured copy

    Timestamps

    Event (reported)
    Mar 30, 2026
    Published
    Apr 1, 2026
    Ingested by INSIDER
    Nov 5, 04:08 UTC
    Last re-read
    Nov 5, 04:08 UTC

    Extracted facts

    Filer
    Smollen John
    Role
    EVP, New Product Development
    Transaction
    Tax withholdingAs filed: “F”
    Asset
    MIAMI INTERNATIONAL HOLDINGS, INC.
    Ticker
    MIAX
    Shares
    362
    Price per share
    $37.5
    Value
    $13,575
    Execution date (reported)
    Mar 30, 2026
    Owned after transaction
    170.8K shares
    Days from execution to publication
    2

    Calculation

    Value = shares × reported price per share

    • Shares: 362
    • Price: $37.5

    = $13,575

    What this establishes

    Smollen John filed this Form 4 reporting a tax withholding of MIAX on Mar 30, 2026. It became public on Apr 1, 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
    EVP, New Product Development
    Smollen Johncik:0002080703
    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.