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Brown Shelly

Disclosed activity across 1 company

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31771
SEC CIK
0002080506

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
MIAMI INTERNATIONAL HOLDINGS, INC.MIAX · Entity 4026EVP, Chief Strategy OfficerSeptember 16, 2026September 17, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

MIAMI INTERNATIONAL HOLDINGS, INC.

Report date September 16, 2026 · Filed September 17, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect316,490 Reported balance After 2026-09-16 transaction · row 1
1 source row

Row 1 · 2026-09-16 · Sale · Disposed 21,217 · Balance 316,490

F1: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 22, 2025.

F2: This transaction was executed in multiple trades throughout the day at prices ranging from $37.84 to $39.56. The price reported above reflects the weighted average sales price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

Filing footnotes · ownership attribution and instrument terms

F1: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 22, 2025.

F2: This transaction was executed in multiple trades throughout the day at prices ranging from $37.84 to $39.56. The price reported above reflects the weighted average sales price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative 143,430 $0.00 Strike: $15.22 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 28

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 143,430

Underlying: Common Stock · 143,430 shares

Expires 2030-11-30

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative 143,430 $0.00 Strike: $15.22 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 27

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 143,430 shares

Expires 2030-11-30

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative 141,667 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 26

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 141,667

Underlying: Common Stock · 141,667 shares

Expires 2029-07-31

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative 141,667 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 25

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 141,667 shares

Expires 2029-07-31

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative 91,667 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 24

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 91,667

Underlying: Common Stock · 91,667 shares

Expires 2028-05-17

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative 91,667 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 23

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 91,667 shares

Expires 2028-05-17

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative 41,667 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 22

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,667

Underlying: Common Stock · 41,667 shares

Expires 2027-10-12

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative 41,667 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 21

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 41,667 shares

Expires 2027-10-12

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative 65,334 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 20

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 65,334

Underlying: Common Stock · 65,334 shares

Expires 2026-08-02

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative 65,334 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 19

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 65,334 shares

Expires 2026-08-02

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionIncentive Stock Option (Right to Buy) · Derivative 3,878 $0.00 Strike: $25.78 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 18

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,878

Underlying: Common Stock · 3,878 shares

Expires 2032-03-09

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionIncentive Stock Option (Right to Buy) · Derivative 3,878 $0.00 Strike: $25.78 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 17

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 3,878 shares

Expires 2032-03-09

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionIncentive Stock Option (Right to Buy) · Derivative 6,195 $0.00 Strike: $16.14 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 16

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,195

Underlying: Common Stock · 6,195 shares

Expires 2031-09-09

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionIncentive Stock Option (Right to Buy) · Derivative 6,195 $0.00 Strike: $16.14 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 15

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 6,195 shares

Expires 2031-09-09

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionIncentive Stock Option (Right to Buy) · Derivative 6,570 $0.00 Strike: $15.22 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 14

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,570

Underlying: Common Stock · 6,570 shares

Expires 2030-11-30

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionIncentive Stock Option (Right to Buy) · Derivative 6,570 $0.00 Strike: $15.22 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 13

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 6,570 shares

Expires 2030-11-30

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionIncentive Stock Option (Right to Buy) · Derivative 8,333 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 12

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,333

Underlying: Common Stock · 8,333 shares

Expires 2029-07-31

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionIncentive Stock Option (Right to Buy) · Derivative 8,333 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 11

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 8,333 shares

Expires 2029-07-31

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionIncentive Stock Option (Right to Buy) · Derivative 8,333 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 10

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,333

Underlying: Common Stock · 8,333 shares

Expires 2028-05-17

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionIncentive Stock Option (Right to Buy) · Derivative 8,333 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 9

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 8,333 shares

Expires 2028-05-17

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionIncentive Stock Option (Right to Buy) · Derivative 8,333 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 8

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,333

Underlying: Common Stock · 8,333 shares

Expires 2027-10-12

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

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August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionIncentive Stock Option (Right to Buy) · Derivative 8,333 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 7

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 8,333 shares

Expires 2027-10-12

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

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August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionIncentive Stock Option (Right to Buy) · Derivative 16,666 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 6

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,666

Underlying: Common Stock · 16,666 shares

Expires 2026-08-02

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

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August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionIncentive Stock Option (Right to Buy) · Derivative 16,666 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 5

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 16,666 shares

Expires 2026-08-02

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.

F4 · derivative.exercise_date: The options are fully vested.

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August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 ConversionNonvoting Common Stock · Derivative 200,475 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 4

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 200,475 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Represents 200,475 shares of Nonvoting Common Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's IPO and which have no expiration date.

F2 · shares: Represents 200,475 shares of Nonvoting Common Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's IPO and which have no expiration date.

F2 · derivative.exercise_date: Represents 200,475 shares of Nonvoting Common Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's IPO and which have no expiration date.

F2 · derivative.expiration_date: Represents 200,475 shares of Nonvoting Common Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's IPO and which have no expiration date.

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August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 ConversionSeries B Preferred Stock · Derivative 500 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · derivative · entry 3

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Represents 500 shares of Series B Preferred Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's initial public offering ("IPO") and which have no expiration date.

F1 · shares: Represents 500 shares of Series B Preferred Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's initial public offering ("IPO") and which have no expiration date.

F1 · derivative.exercise_date: Represents 500 shares of Series B Preferred Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's initial public offering ("IPO") and which have no expiration date.

F1 · derivative.expiration_date: Represents 500 shares of Series B Preferred Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's initial public offering ("IPO") and which have no expiration date.

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August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 ConversionCommon Stock 200,475 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · nonDerivative · entry 2

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 339,029

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · shares: Represents 200,475 shares of Nonvoting Common Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's IPO and which have no expiration date.

F2 · price: Represents 200,475 shares of Nonvoting Common Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's IPO and which have no expiration date.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:07 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 ConversionCommon Stock 500 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-040792 · wk-form4_1755634027.xml · nonDerivative · entry 1

Brown Shelly · CIK 0002080506 · EVP, Strat. Planning & BD

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 339,029

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Represents 500 shares of Series B Preferred Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's initial public offering ("IPO") and which have no expiration date.

F1 · price: Represents 500 shares of Series B Preferred Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's initial public offering ("IPO") and which have no expiration date.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.