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Smollen John

Disclosed activity across 1 company

Tapewire entity
36898
SEC CIK
0002080703

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
MIAMI INTERNATIONAL HOLDINGS, INC.MIAX · Entity 4026EVP, New Product DevelopmentJune 16, 2026June 18, 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 June 16, 2026 · Filed June 18, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect178,212 Reported balance After 2026-06-16 transaction · row 1
1 source row

Row 1 · 2026-06-16 · Grant · Acquired 7,455 · Balance 178,212

F1: The amount represents restricted stock units ("RSUs") that vest as to 2,485 on June 16, 2027, 2,485 on June 16, 2028 and the remaining 2,485 on June 16, 2029, subject to the Reporting Person's continued service to the Issuer or its subsidiaries through each applicable vesting date.

Incentive Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $40.24 · Expires 2036-06-15Direct2,485 Reported balance After 2026-06-16 transaction · row 2 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 2 · 2026-06-16 · Grant · Acquired 2,485 · Balance 2,485

F2: 829 of the shares subject to this option will vest on June 16, 2027, 828 of the shares subject to this option will vest on June 16, 2028 and the remaining 828 of the shares subject to this option will vest on June 16, 2029, subject to the Reporting Person's continued service to the Issuer or its subsidiaries through the applicable vesting date.

Nonqualified Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $40.24 · Expires 2036-06-15Direct5,184 Reported balance After 2026-06-16 transaction · row 3 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 3 · 2026-06-16 · Grant · Acquired 5,184 · Balance 5,184

F3: 1,728 of the shares subject to this option will vest on June 16, 2027, 1,728 of the shares subject to this option will vest on June 16, 2028 and the remaining 1,728 of the shares subject to this option will vest on June 16, 2029, subject to the Reporting Person's continued service to the Issuer or its subsidiaries through the applicable vesting date.

Filing footnotes · ownership attribution and instrument terms

F1: The amount represents restricted stock units ("RSUs") that vest as to 2,485 on June 16, 2027, 2,485 on June 16, 2028 and the remaining 2,485 on June 16, 2029, subject to the Reporting Person's continued service to the Issuer or its subsidiaries through each applicable vesting date.

F2: 829 of the shares subject to this option will vest on June 16, 2027, 828 of the shares subject to this option will vest on June 16, 2028 and the remaining 828 of the shares subject to this option will vest on June 16, 2029, subject to the Reporting Person's continued service to the Issuer or its subsidiaries through the applicable vesting date.

F3: 1,728 of the shares subject to this option will vest on June 16, 2027, 1,728 of the shares subject to this option will vest on June 16, 2028 and the remaining 1,728 of the shares subject to this option will vest on June 16, 2029, subject to the Reporting Person's continued service to the Issuer or its subsidiaries through the applicable vesting date.

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
June 16, 2026 Filed Jun 18, 2026 20:26 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 GrantNonqualified Stock Option (Right to Buy) · Derivative 5,184 $0.00 Strike: $40.24 $0.00
Disclosure

SEC source: 0002080703-26-000004 · wk-form4_1781814391.xml · derivative · entry 3

Smollen John · CIK 0002080703 · EVP, New Product Development

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,184

Underlying: Common Stock · 5,184 shares

Expires 2036-06-15

F3 · derivative.exercise_date: 1,728 of the shares subject to this option will vest on June 16, 2027, 1,728 of the shares subject to this option will vest on June 16, 2028 and the remaining 1,728 of the shares subject to this option will vest on June 16, 2029, subject to the Reporting Person's continued service to the Issuer or its subsidiaries through the applicable vesting date.

Read SEC document
June 16, 2026 Filed Jun 18, 2026 20:26 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 GrantIncentive Stock Option (Right to Buy) · Derivative 2,485 $0.00 Strike: $40.24 $0.00
Disclosure

SEC source: 0002080703-26-000004 · wk-form4_1781814391.xml · derivative · entry 2

Smollen John · CIK 0002080703 · EVP, New Product Development

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,485

Underlying: Common Stock · 2,485 shares

Expires 2036-06-15

F2 · derivative.exercise_date: 829 of the shares subject to this option will vest on June 16, 2027, 828 of the shares subject to this option will vest on June 16, 2028 and the remaining 828 of the shares subject to this option will vest on June 16, 2029, subject to the Reporting Person's continued service to the Issuer or its subsidiaries through the applicable vesting date.

Read SEC document
June 16, 2026 Filed Jun 18, 2026 20:26 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 GrantCommon Stock 7,455 $0.00 $0.00
Disclosure

SEC source: 0002080703-26-000004 · wk-form4_1781814391.xml · nonDerivative · entry 1

Smollen John · CIK 0002080703 · EVP, New Product Development

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 178,212

F1 · shares: The amount represents restricted stock units ("RSUs") that vest as to 2,485 on June 16, 2027, 2,485 on June 16, 2028 and the remaining 2,485 on June 16, 2029, subject to the Reporting Person's continued service to the Issuer or its subsidiaries through each applicable vesting date.

Read SEC document
March 30, 2026 Filed Apr 1, 2026 20:48 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Tax withholdingCommon Stock 362 $37.50 $13,575.00
Disclosure

SEC source: 0002080703-26-000002 · wk-form4_1775076485.xml · nonDerivative · entry 1

Smollen John · CIK 0002080703 · EVP, New Product Development

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 170,757

F1 · shares: Represents shares that have been surrendered to the Company to satisfy tax withholding and remittance obligations in connection with the net settlement of restricted stock awards and does not represent a sale by the reporting person.

F2 · balance_after: Reflects a correction to a clerical error in the Reporting Person's previous filings as to the amount of securities beneficially owned.

Read SEC document
September 11, 2025 Filed Sep 15, 2025 21:14 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionIncentive Stock Option (Right to Buy) · Derivative 24,999 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0002080703-25-000002 · wk-form4_1757970842.xml · derivative · entry 5

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 24,999 shares

Expires 2025-09-17

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.

F2 · derivative.exercise_date: The options are fully vested.

Read SEC document
September 11, 2025 Filed Sep 15, 2025 21:14 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative 125,001 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0002080703-25-000002 · wk-form4_1757970842.xml · derivative · entry 4

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 125,001 shares

Expires 2025-09-17

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.

F2 · derivative.exercise_date: The options are fully vested.

Read SEC document
September 11, 2025 Filed Sep 15, 2025 21:14 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionCommon Stock 24,999 $12.00 $299,988.00
Disclosure

SEC source: 0002080703-25-000002 · wk-form4_1757970842.xml · nonDerivative · entry 3

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 166,119

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.

Read SEC document
September 11, 2025 Filed Sep 15, 2025 21:14 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Tax withholdingCommon Stock 52,054 $37.39 $1,946,299.06
Disclosure

SEC source: 0002080703-25-000002 · wk-form4_1757970842.xml · nonDerivative · entry 2

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 141,120

F1 · shares: Represents shares that have been surrendered to the Company to satisfy tax withholding and remittance obligations in connection with the net settlement of options exercised and does not represent a sale by the reporting person.

Read SEC document
September 11, 2025 Filed Sep 15, 2025 21:14 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionCommon Stock 125,001 $12.00 $1,500,012.00
Disclosure

SEC source: 0002080703-25-000002 · wk-form4_1757970842.xml · nonDerivative · entry 1

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 193,174

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.

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 29,743 $0.00 Strike: $25.78 $0.00
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 24

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,743

Underlying: Common Stock · 29,743 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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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 29,743 $0.00 Strike: $25.78 $0.00
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 23

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 29,743 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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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 80,930 $0.00 Strike: $15.22 $0.00
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 22

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,930

Underlying: Common Stock · 80,930 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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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 80,930 $0.00 Strike: $15.22 $0.00
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 21

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 80,930 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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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 104,167 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 20

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 104,167

Underlying: Common Stock · 104,167 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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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 104,167 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 19

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 104,167 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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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 75,001 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 18

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,001

Underlying: Common Stock · 75,001 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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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 75,001 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 17

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 75,001 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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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 125,001 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 16

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 125,001

Underlying: Common Stock · 125,001 shares

Expires 2025-09-17

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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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 125,001 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 15

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Series B Preferred Stock · 125,001 shares

Expires 2025-09-17

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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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 7,757 $0.00 Strike: $25.78 $0.00
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 14

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,757

Underlying: Common Stock · 7,757 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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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 7,757 $0.00 Strike: $25.78 $0.00
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 13

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 7,757 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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 12

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 11

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 10

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 9

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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 24,999 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 8

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,999

Underlying: Common Stock · 24,999 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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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 24,999 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 7

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 24,999 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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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 24,999 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 6

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,999

Underlying: Common Stock · 24,999 shares

Expires 2025-09-17

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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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 24,999 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 5

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Series B Preferred Stock · 24,999 shares

Expires 2025-09-17

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 or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, for the same price and under the same conditions.

F3 · shares: The options were granted initially as the right to buy Nonvoting Common Stock or Series B Preferred Stock, as applicable. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock or Series B Preferred Stock, as applicable, 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 ConversionNonvoting Common Stock · Derivative 65,947 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 4

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 65,947 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: Includes 65,947 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 initial public offering ("IPO") and which have no expiration date.

F1 · shares: Includes 65,947 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 initial public offering ("IPO") and which have no expiration date.

F1 · derivative.exercise_date: Includes 65,947 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 initial public offering ("IPO") and which have no expiration date.

F1 · derivative.expiration_date: Includes 65,947 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 initial public offering ("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 ConversionSeries B Preferred Stock · Derivative 91,666 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · derivative · entry 3

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by Quivetneck Capital LLC of which Mr. Smollen is a managing member

Disclosed balance after: 0

Underlying: Common Stock · 91,666 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 91,666 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 IPO and which have no expiration date.

F2 · shares: Represents 91,666 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 IPO and which have no expiration date.

F2 · derivative.exercise_date: Represents 91,666 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 IPO and which have no expiration date.

F2 · derivative.expiration_date: Represents 91,666 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 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 91,666 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · nonDerivative · entry 2

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by Quivetneck Capital LLC of which Mr. Smollen is a managing member

Disclosed balance after: 91,666

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 91,666 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 IPO and which have no expiration date.

F2 · price: Represents 91,666 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 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 73,173 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-040795 · wk-form4_1755634051.xml · nonDerivative · entry 1

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 68,173

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: Includes 65,947 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 initial public offering ("IPO") and which have no expiration date.

F1 · price: Includes 65,947 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 initial public offering ("IPO") and which have no expiration date.

Read SEC document
August 13, 2025 Filed Aug 15, 2025 20:48 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 PurchaseCommon Stock 5,000 $23.00 $115,000.00
Disclosure

SEC source: 0001628280-25-040559 · wk-form4_1755290920.xml · nonDerivative · entry 1

Smollen John · CIK 0002080703 · EVP Traded Products & Relation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,226

Read SEC document

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