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M

MIAX

NYSE

MIAMI INTERNATIONAL HOLDINGS, INC.

Latest disclosureOctober 6, 2026
Insider score Why 0?
0/ 100
Qualifying buys · 30d
$0

0 purchases · 64 sales

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Insider transactions 274

Limited filing history
All274Buying0Selling64Other210
Filters

Last 30 daysNo qualifying insider buying. Sales: $2.15M by 2 insiders.

210 of 274 trades · March 25, 2026 – October 2, 2026Incomplete history: this shows the filings imported so far, not every filing ever made. Dates are trade dates. Filters affect this table only.

Showing the first 6 of 20 trades on this page.

Exercise or conversion

Douglas M. Schafer JR

EVP and CIO

Common Stock

Value context
$480K
Reported price
$12.00 / share
Traded October 2, 2026Filed October 6, 2026SEC filing
Exercise or conversion

Douglas M. Schafer JR

EVP and CIO

Nonqualified Stock Option (Right to Buy)

Derivative security · not the ordinary share price.

Value context
Not a separate purchase
Exercise / conversion price
$12.00 exercise / conversion price
Understand this price

This row records an option exercise or conversion. The derivative transaction price is separate from the exercise price; it is not the stock's market price. Its row value is not shown as another stock purchase.

Traded October 2, 2026Filed October 6, 2026SEC filing
Exercise or conversion

Harish Jayabalan

EVP, CISO and CRO

Common Stock

Value context
$100K
Reported price
$12.00 / share
Traded September 25, 2026Filed September 29, 2026SEC filing
Exercise or conversion

Harish Jayabalan

EVP, CISO and CRO

Incentive Stock Option (Right to Buy)

Derivative security · not the ordinary share price.

Value context
Not a separate purchase
Exercise / conversion price
$12.00 exercise / conversion price
Understand this price

This row records an option exercise or conversion. The derivative transaction price is separate from the exercise price; it is not the stock's market price. Its row value is not shown as another stock purchase.

Traded September 25, 2026Filed September 29, 2026SEC filing
Tax or exercise withholding

Shelly Brown

EVP, Chief Strategy Officer

Common Stock

Value context
$692.68K
Reported price
$42.54 / share
Traded September 11, 2026Filed September 11, 2026SEC filing
Exercise or conversion

Thomas P. Gallagher

Chairman & CEO

Common Stock

Value context
$564K
Reported price
$12.00 / share
Traded September 3, 2026Filed September 4, 2026SEC filing
Exercise or conversion

Thomas P. Gallagher

Chairman & CEO

Common Stock

Value context
$199.99K
Reported price
$12.00 / share
Traded September 3, 2026Filed September 4, 2026SEC filing
Exercise or conversion

Thomas P. Gallagher

Chairman & CEO

Common Stock

Value context
$100K
Reported price
$12.00 / share
Traded September 3, 2026Filed September 4, 2026SEC filing
Exercise or conversion

Thomas P. Gallagher

Chairman & CEO

Common Stock

Value context
$199.99K
Reported price
$15.22 / share
Traded September 3, 2026Filed September 4, 2026SEC filing
Exercise or conversion

Thomas P. Gallagher

Chairman & CEO

Common Stock

Value context
$99.99K
Reported price
$22.40 / share
Traded September 3, 2026Filed September 4, 2026SEC filing
Exercise or conversion

Thomas P. Gallagher

Chairman & CEO

Nonqualified Stock Option (Right to Buy)

Derivative security · not the ordinary share price.

Value context
Not a separate purchase
Exercise / conversion price
$12.00 exercise / conversion price
Understand this price

This row records an option exercise or conversion. The derivative transaction price is separate from the exercise price; it is not the stock's market price. Its row value is not shown as another stock purchase.

Traded September 3, 2026Filed September 4, 2026SEC filing
Exercise or conversion

Thomas P. Gallagher

Chairman & CEO

Incentive Stock Option (Right to Buy)

Derivative security · not the ordinary share price.

Value context
Not a separate purchase
Exercise / conversion price
$12.00 exercise / conversion price
Understand this price

This row records an option exercise or conversion. The derivative transaction price is separate from the exercise price; it is not the stock's market price. Its row value is not shown as another stock purchase.

Traded September 3, 2026Filed September 4, 2026SEC filing
Exercise or conversion

Thomas P. Gallagher

Chairman & CEO

Incentive Stock Option (Right to Buy)

Derivative security · not the ordinary share price.

Value context
Not a separate purchase
Exercise / conversion price
$12.00 exercise / conversion price
Understand this price

This row records an option exercise or conversion. The derivative transaction price is separate from the exercise price; it is not the stock's market price. Its row value is not shown as another stock purchase.

Traded September 3, 2026Filed September 4, 2026SEC filing
Exercise or conversion

Thomas P. Gallagher

Chairman & CEO

Incentive Stock Option (Right to Buy)

Derivative security · not the ordinary share price.

Value context
Not a separate purchase
Exercise / conversion price
$15.22 exercise / conversion price
Understand this price

This row records an option exercise or conversion. The derivative transaction price is separate from the exercise price; it is not the stock's market price. Its row value is not shown as another stock purchase.

Traded September 3, 2026Filed September 4, 2026SEC filing
Exercise or conversion

Thomas P. Gallagher

Chairman & CEO

Incentive Stock Option (Right to Buy)

Derivative security · not the ordinary share price.

Value context
Not a separate purchase
Exercise / conversion price
$22.40 exercise / conversion price
Understand this price

This row records an option exercise or conversion. The derivative transaction price is separate from the exercise price; it is not the stock's market price. Its row value is not shown as another stock purchase.

Traded September 3, 2026Filed September 4, 2026SEC filing
Exercise or conversion

Barbara J. Comly

EVP, GC & Corporate Secretary

Common Stock

Value context
$533.34K
Reported price
$12.00 / share
Traded September 2, 2026Filed September 4, 2026SEC filing
Exercise or conversion

Barbara J. Comly

EVP, GC & Corporate Secretary

Nonqualified Stock Option (Right to Buy)

Derivative security · not the ordinary share price.

Value context
Not a separate purchase
Exercise / conversion price
$12.00 exercise / conversion price
Understand this price

This row records an option exercise or conversion. The derivative transaction price is separate from the exercise price; it is not the stock's market price. Its row value is not shown as another stock purchase.

Traded September 2, 2026Filed September 4, 2026SEC filing
Exercise or conversion

Edward Deitzel

EVP, CRO, CCO MIAX Exchanges

Common Stock

Value context
$132K
Reported price
$12.00 / share
Traded September 3, 2026Filed September 4, 2026SEC filing
Exercise or conversion

Edward Deitzel

EVP, CRO, CCO MIAX Exchanges

Nonqualified Stock Option (Right to Buy)

Derivative security · not the ordinary share price.

Value context
Not a separate purchase
Exercise / conversion price
$12.00 exercise / conversion price
Understand this price

This row records an option exercise or conversion. The derivative transaction price is separate from the exercise price; it is not the stock's market price. Its row value is not shown as another stock purchase.

Traded September 3, 2026Filed September 4, 2026SEC filing
Exercise or conversion

Douglas M. Schafer JR

EVP and CIO

Common Stock

Value context
$520.01K
Reported price
$12.00 / share
Traded September 2, 2026Filed September 4, 2026SEC filing
Reporting insiderSecurity / transactionAmount / priceValueTraded / disclosedSource
EVP and CIOCommon StockOption exercise or conversion10b5-140,000$12.00 / share$480KOct 2Filed Oct 6 · 4d laterSEC filing
EVP and CIONonqualified Stock Option (Right to Buy)Option exercise or conversion10b5-1Derivative units40,000$12.00 exercise / conversion priceNot a separate purchaseOct 2Filed Oct 6 · 4d laterSEC filing
EVP, CISO and CROCommon StockOption exercise or conversion8,333$12.00 / share$100KSep 25Filed Sep 29 · 4d laterSEC filing
EVP, CISO and CROIncentive Stock Option (Right to Buy)Option exercise or conversionDerivative units8,333$12.00 exercise / conversion priceNot a separate purchaseSep 25Filed Sep 29 · 4d laterSEC filing
EVP, Chief Strategy OfficerCommon StockExercise-price or tax withholding16,283$42.54 / share$692.68KSep 11Filed Sep 11 · 0d laterSEC filing
Chairman & CEOCommon StockOption exercise or conversion10b5-147,000$12.00 / share$564KSep 3Filed Sep 4 · 1d laterSEC filing
Chairman & CEOCommon StockOption exercise or conversion10b5-116,666$12.00 / share$199.99KSep 3Filed Sep 4 · 1d laterSEC filing
Chairman & CEOCommon StockOption exercise or conversion10b5-18,333$12.00 / share$100KSep 3Filed Sep 4 · 1d laterSEC filing
Chairman & CEOCommon StockOption exercise or conversion10b5-113,140$15.22 / share$199.99KSep 3Filed Sep 4 · 1d laterSEC filing
Chairman & CEOCommon StockOption exercise or conversion10b5-14,464$22.40 / share$99.99KSep 3Filed Sep 4 · 1d laterSEC filing
Chairman & CEONonqualified Stock Option (Right to Buy)Option exercise or conversion10b5-1Derivative units47,000$12.00 exercise / conversion priceNot a separate purchaseSep 3Filed Sep 4 · 1d laterSEC filing
Chairman & CEOIncentive Stock Option (Right to Buy)Option exercise or conversion10b5-1Derivative units16,666$12.00 exercise / conversion priceNot a separate purchaseSep 3Filed Sep 4 · 1d laterSEC filing
Chairman & CEOIncentive Stock Option (Right to Buy)Option exercise or conversion10b5-1Derivative units8,333$12.00 exercise / conversion priceNot a separate purchaseSep 3Filed Sep 4 · 1d laterSEC filing
Chairman & CEOIncentive Stock Option (Right to Buy)Option exercise or conversion10b5-1Derivative units13,140$15.22 exercise / conversion priceNot a separate purchaseSep 3Filed Sep 4 · 1d laterSEC filing
Chairman & CEOIncentive Stock Option (Right to Buy)Option exercise or conversion10b5-1Derivative units4,464$22.40 exercise / conversion priceNot a separate purchaseSep 3Filed Sep 4 · 1d laterSEC filing
EVP, GC & Corporate SecretaryCommon StockOption exercise or conversion10b5-144,445$12.00 / share$533.34KSep 2Filed Sep 4 · 2d laterSEC filing
EVP, GC & Corporate SecretaryNonqualified Stock Option (Right to Buy)Option exercise or conversion10b5-1Derivative units44,445$12.00 exercise / conversion priceNot a separate purchaseSep 2Filed Sep 4 · 2d laterSEC filing
EVP, CRO, CCO MIAX ExchangesCommon StockOption exercise or conversion10b5-111,000$12.00 / share$132KSep 3Filed Sep 4 · 1d laterSEC filing
EVP, CRO, CCO MIAX ExchangesNonqualified Stock Option (Right to Buy)Option exercise or conversion10b5-1Derivative units11,000$12.00 exercise / conversion priceNot a separate purchaseSep 3Filed Sep 4 · 1d laterSEC filing
EVP and CIOCommon StockOption exercise or conversion10b5-143,334$12.00 / share$520.01KSep 2Filed Sep 4 · 2d laterSEC filing

Showing the latest 20 of 210 trades. Show all 210 trades

Congress transactions 1

All Congress filings
Purchase disclosed

Miami International Holdings, Inc. Common Stock (MIAX) · Stock

The filing reports a purchase for the member.

Gilbert Cisneros official portraitGilbert CisnerosReporting House member
Reported amount
$15,001 – $50,000Reported range; exact amount not disclosed.
Trade date
March 20, 2026
Filed April 7, 2026 · 18d laterOriginal report
Explore furtherTechnical lab Company financials Test a strategy Compare company

Why this buying score?

No qualifying common-equity purchases

No eligible common-equity purchase is public by this cutoff within 180 transaction-date days. Other instruments, exercises and routine activity do not contribute purchase points.

+0 pts

This score describes qualifying insider purchases at issuer level. Read the methodology

Sources and coverage

Limited filing history · Market-wide discovery does not establish complete company history. View coverage
Source
SEC EDGAR · Form 4
Issuer CIK
0001438472
Latest public acceptance
Oct 6, 2026, 09:28 PM UTC
Score calculated
Oct 8, 2026, 12:06 AM UTC
Parser
form4-parser-1.5
Classifier
form4-classifier-1.1
Scoring methodology
insider-experimental-1.1
Availability
Public filing time, not trade date

Open a transaction's SEC filing for the primary evidence. A code P may describe an open-market or private purchase; classification is not proof of intent.

Insider activity can have many explanations. Signal Strength is not a probability of profit or a recommendation to trade.