TapewireFind a company

person · Reporting owner

Schwarzkopf Cynthia

Disclosed activity across 1 company

Tapewire entity
21756
SEC CIK
0002080596

Export transaction history ↓

Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
MIAMI INTERNATIONAL HOLDINGS, INC.MIAX · Entity 4026DirectorAugust 17, 2026August 19, 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 August 17, 2026 · Filed August 19, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect88,545 Ending reported balance After 2026-08-17 transaction · row 2
2 source rows · reconciled sequence

Row 1 · 2026-08-17 · Exercise / conversion · Acquired 5,000 · Balance 93,545

F1: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on March 12, 2026.

Row 2 · 2026-08-17 · Sale · Disposed 5,000 · Balance 88,545

F1: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on March 12, 2026.

F2: This transaction was executed in multiple trades throughout the day at prices ranging from $42.54 to $43.33. 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.

Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $12.00 · Expires 2027-05-31Direct11,916 Reported balance After 2026-08-17 transaction · row 3 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 3 · 2026-08-17 · Exercise / conversion · Disposed 5,000 · Balance 11,916

F1: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on March 12, 2026.

F3: The options are fully vested.

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 March 12, 2026.

F2: This transaction was executed in multiple trades throughout the day at prices ranging from $42.54 to $43.33. 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.

F3: The options are fully vested.

Transaction history

JSON API
Reset

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 17, 2026 Filed Aug 19, 2026 20:12 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionStock Option (Right to Buy) · Derivative 5,000 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-26-057950 · wk-form4_1787170325.xml · derivative · entry 3

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 11,916

Underlying: Common Stock · 5,000 shares

Expires 2027-05-31

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.

F1 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on March 12, 2026.

F3 · derivative.exercise_date: The options are fully vested.

Read SEC document
August 17, 2026 Filed Aug 19, 2026 20:12 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 SaleCommon Stock 5,000 $42.85 $214,250.00
Disclosure

SEC source: 0001628280-26-057950 · wk-form4_1787170325.xml · nonDerivative · entry 2

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 88,545

F1 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on March 12, 2026.

F2 · price: This transaction was executed in multiple trades throughout the day at prices ranging from $42.54 to $43.33. 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.

Read SEC document
August 17, 2026 Filed Aug 19, 2026 20:12 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionCommon Stock 5,000 $12.00 $60,000.00
Disclosure

SEC source: 0001628280-26-057950 · wk-form4_1787170325.xml · nonDerivative · entry 1

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 93,545

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 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on March 12, 2026.

Read SEC document
July 15, 2026 Filed Jul 16, 2026 20:15 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionStock Option (Right to Buy) · Derivative 5,000 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0002080596-26-000006 · wk-form4_1784232907.xml · derivative · entry 3

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 16,916

Underlying: Common Stock · 5,000 shares

Expires 2027-05-31

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.

F1 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on March 12, 2026.

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

Read SEC document
July 15, 2026 Filed Jul 16, 2026 20:15 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 SaleCommon Stock 5,000 $42.00 $210,000.00
Disclosure

SEC source: 0002080596-26-000006 · wk-form4_1784232907.xml · nonDerivative · entry 2

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 88,545

F1 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on March 12, 2026.

Read SEC document
July 15, 2026 Filed Jul 16, 2026 20:15 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionCommon Stock 5,000 $12.00 $60,000.00
Disclosure

SEC source: 0002080596-26-000006 · wk-form4_1784232907.xml · nonDerivative · entry 1

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 93,545

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 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on March 12, 2026.

Read SEC document
June 16, 2026 Filed Jun 17, 2026 20:39 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 GrantNonqualified Stock Option (Right to Buy) · Derivative 5,142 $0.00 Strike: $40.24 $0.00
Disclosure

SEC source: 0002080596-26-000004 · wk-form4_1781728753.xml · derivative · entry 3

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,142

Underlying: Common Stock · 5,142 shares

Expires 2036-06-15

F3 · derivative.exercise_date: 2,571 of the shares subject to this option will vest on June 30, 2026, 1,285 of the shares subject to this option will vest on September 30, 2026 and the remaining 1,286 of the shares subject to this option will vest on December 31, 2026, 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 17, 2026 20:39 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 GrantCommon Stock 4,970 $0.00 $0.00
Disclosure

SEC source: 0002080596-26-000004 · wk-form4_1781728753.xml · nonDerivative · entry 2

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 88,545

F2 · shares: The amount represents RSUs that vest on the last business day immediately preceding the 2027 annual meeting of stockholders, subject to the reporting person's continued service to the Issuer through the vesting date.

Read SEC document
June 15, 2026 Filed Jun 17, 2026 20:39 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 GrantCommon Stock 2,267 $0.00 $0.00
Disclosure

SEC source: 0002080596-26-000004 · wk-form4_1781728753.xml · nonDerivative · entry 1

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 83,575

F1 · shares: The amount represents restricted stock units ("RSUs") that fully vested on the date of grant. Each RSU represents a right to receive one share of the Issuer's common stock.

Read SEC document
June 11, 2026 Filed Jun 12, 2026 20:15 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionStock Option (Right to Buy) · Derivative 19,500 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0002080596-26-000002 · wk-form4_1781295350.xml · derivative · entry 3

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 19,500 shares

Expires 2026-06-19

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 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on March 12, 2026.

F3 · derivative.exercise_date: The options are fully vested.

Read SEC document
June 11, 2026 Filed Jun 12, 2026 20:15 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 SaleCommon Stock 19,500 $41.73 $813,735.00
Disclosure

SEC source: 0002080596-26-000002 · wk-form4_1781295350.xml · nonDerivative · entry 2

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 81,308

F1 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on March 12, 2026.

F2 · price: This transaction was executed in multiple trades throughout the day at prices ranging from $40.86 to $42.75. 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.

Read SEC document
June 11, 2026 Filed Jun 12, 2026 20:15 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionCommon Stock 19,500 $12.00 $234,000.00
Disclosure

SEC source: 0002080596-26-000002 · wk-form4_1781295350.xml · nonDerivative · entry 1

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 100,808

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 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on March 12, 2026.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:05 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionStock Option (Right to Buy) · Derivative 32,501 $0.00 Strike: $16.14 $0.00
Disclosure

SEC source: 0001628280-25-040780 · wk-form4_1755633911.xml · derivative · entry 16

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,501

Underlying: Common Stock · 32,501 shares

Expires 2031-05-31

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 20:05 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionStock Option (Right to Buy) · Derivative 32,501 $0.00 Strike: $16.14 $0.00
Disclosure

SEC source: 0001628280-25-040780 · wk-form4_1755633911.xml · derivative · entry 15

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 32,501 shares

Expires 2031-05-31

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 20:05 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionStock Option (Right to Buy) · Derivative 28,437 $0.00 Strike: $14.00 $0.00
Disclosure

SEC source: 0001628280-25-040780 · wk-form4_1755633911.xml · derivative · entry 14

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,437

Underlying: Common Stock · 28,437 shares

Expires 2030-06-30

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 20:05 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionStock Option (Right to Buy) · Derivative 28,437 $0.00 Strike: $14.00 $0.00
Disclosure

SEC source: 0001628280-25-040780 · wk-form4_1755633911.xml · derivative · entry 13

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 28,437 shares

Expires 2030-06-30

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 20:05 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionStock Option (Right to Buy) · Derivative 22,708 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040780 · wk-form4_1755633911.xml · derivative · entry 12

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,708

Underlying: Common Stock · 22,708 shares

Expires 2029-05-31

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 20:05 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionStock Option (Right to Buy) · Derivative 22,708 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040780 · wk-form4_1755633911.xml · derivative · entry 11

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 22,708 shares

Expires 2029-05-31

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 20:05 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionStock Option (Right to Buy) · Derivative 21,250 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040780 · wk-form4_1755633911.xml · derivative · entry 10

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,250

Underlying: Common Stock · 21,250 shares

Expires 2028-04-30

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 20:05 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionStock Option (Right to Buy) · Derivative 21,250 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040780 · wk-form4_1755633911.xml · derivative · entry 9

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 21,250 shares

Expires 2028-04-30

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 20:05 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionStock Option (Right to Buy) · Derivative 21,916 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040780 · wk-form4_1755633911.xml · derivative · entry 8

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,916

Underlying: Common Stock · 21,916 shares

Expires 2027-05-31

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 20:05 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionStock Option (Right to Buy) · Derivative 21,916 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040780 · wk-form4_1755633911.xml · derivative · entry 7

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 21,916 shares

Expires 2027-05-31

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 20:05 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionStock Option (Right to Buy) · Derivative 19,500 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040780 · wk-form4_1755633911.xml · derivative · entry 6

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,500

Underlying: Common Stock · 19,500 shares

Expires 2026-06-19

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 20:05 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 Exercise / conversionStock Option (Right to Buy) · Derivative 19,500 $0.00 Strike: $12.00 $0.00
Disclosure

SEC source: 0001628280-25-040780 · wk-form4_1755633911.xml · derivative · entry 5

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Nonvoting Common Stock · 19,500 shares

Expires 2026-06-19

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 20:05 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 ConversionNonvoting Common Stock · Derivative 45,058 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-040780 · wk-form4_1755633911.xml · derivative · entry 4

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 45,058 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: Includes 45,058 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: Includes 45,058 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: Includes 45,058 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: Includes 45,058 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 20:05 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 ConversionSeries B Preferred Stock · Derivative 36,250 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-040780 · wk-form4_1755633911.xml · derivative · entry 3

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 36,250 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 36,250 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: Includes 36,250 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: Includes 36,250 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: Includes 36,250 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.

Read SEC document
August 15, 2025 Filed Aug 19, 2025 20:05 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 ConversionCommon Stock 45,058 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-040780 · wk-form4_1755633911.xml · nonDerivative · entry 2

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 81,308

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: Includes 45,058 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.

F1 · price: Includes 36,250 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 · balance_after: Includes 36,250 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.

F2 · balance_after: Includes 45,058 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 20:05 UTC MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 ConversionCommon Stock 36,250 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-040780 · wk-form4_1755633911.xml · nonDerivative · entry 1

Schwarzkopf Cynthia · CIK 0002080596 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 81,308

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 36,250 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: Includes 36,250 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 · balance_after: Includes 36,250 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.

F2 · balance_after: Includes 45,058 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

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