Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| MIAMI INTERNATIONAL HOLDINGS, INC.MIAX · Entity 4026 | EVP and CIO | October 02, 2026 | October 06, 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 October 02, 2026 · Filed October 06, 2026
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common StockSEC Table I · non-derivative | Direct | 387,414 |
Ending reported balance
After 2026-10-02 transaction · row 2
2 source rows · reconciled sequenceRow 1 · 2026-10-02 · Exercise / conversion · Acquired 40,000 · Balance 427,414 F1: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025. Row 2 · 2026-10-02 · Sale · Disposed 40,000 · Balance 387,414 F1: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025. F2: This transaction was executed in multiple trades throughout the day at prices ranging from $32.91 to $33.97. 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. |
| Nonqualified Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $12.00 · Expires 2029-07-31 | Direct | 155,334 |
Reported balance
After 2026-10-02 transaction · row 3
Instrument identity requires review; Table II rows are not merged.
1 source rowRow 3 · 2026-10-02 · Exercise / conversion · Disposed 40,000 · Balance 155,334 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 December 16, 2025.
F2: This transaction was executed in multiple trades throughout the day at prices ranging from $32.91 to $33.97. 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 APIPurchases/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 date | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| October 02, 2026 Filed Oct 6, 2026 21:28 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative | 40,000 | $0.00 Strike: $12.00 | $0.00 |
DisclosureSEC source: 0001628280-26-065268 · wk-form4_1791322124.xml · derivative · entry 3 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 155,334 Underlying: Common Stock · 40,000 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_date: The options are fully vested. Read SEC document |
| October 02, 2026 Filed Oct 6, 2026 21:28 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | SaleCommon Stock | 40,000 | $33.34 | $1,333,600.00 |
DisclosureSEC source: 0001628280-26-065268 · wk-form4_1791322124.xml · nonDerivative · entry 2 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 387,414 F1 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025. F2 · price: This transaction was executed in multiple trades throughout the day at prices ranging from $32.91 to $33.97. 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 |
| October 02, 2026 Filed Oct 6, 2026 21:28 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Exercise / conversionCommon Stock | 40,000 | $12.00 | $480,000.00 |
DisclosureSEC source: 0001628280-26-065268 · wk-form4_1791322124.xml · nonDerivative · entry 1 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 427,414 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 December 16, 2025. Read SEC document |
| September 02, 2026 Filed Sep 4, 2026 20:25 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative | 4,666 | $0.00 Strike: $12.00 | $0.00 |
DisclosureSEC source: 0002079445-26-000017 · wk-form4_1788553507.xml · derivative · entry 5 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 195,334 Underlying: Common Stock · 4,666 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. F1 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025. F3 · derivative.exercise_date: The options are fully vested. Read SEC document |
| September 02, 2026 Filed Sep 4, 2026 20:25 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative | 43,334 | $0.00 Strike: $12.00 | $0.00 |
DisclosureSEC source: 0002079445-26-000017 · wk-form4_1788553507.xml · derivative · entry 4 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 43,334 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. F1 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025. F3 · derivative.exercise_date: The options are fully vested. Read SEC document |
| September 02, 2026 Filed Sep 4, 2026 20:25 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | SaleCommon Stock | 48,000 | $40.48 | $1,943,040.00 |
DisclosureSEC source: 0002079445-26-000017 · wk-form4_1788553507.xml · nonDerivative · entry 3 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 387,414 F1 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025. F2 · price: This transaction was executed in multiple trades throughout the day at prices ranging from $39.69 to $41.80. 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 |
| September 02, 2026 Filed Sep 4, 2026 20:25 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Exercise / conversionCommon Stock | 4,666 | $12.00 | $55,992.00 |
DisclosureSEC source: 0002079445-26-000017 · wk-form4_1788553507.xml · nonDerivative · entry 2 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 435,414 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 December 16, 2025. Read SEC document |
| September 02, 2026 Filed Sep 4, 2026 20:25 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Exercise / conversionCommon Stock | 43,334 | $12.00 | $520,008.00 |
DisclosureSEC source: 0002079445-26-000017 · wk-form4_1788553507.xml · nonDerivative · entry 1 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 430,748 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 December 16, 2025. Read SEC document |
| August 04, 2026 Filed Aug 6, 2026 20:06 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative | 48,000 | $0.00 Strike: $12.00 | $0.00 |
DisclosureSEC source: 0002079445-26-000015 · wk-form4_1786046792.xml · derivative · entry 3 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 43,334 Underlying: Common Stock · 48,000 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. F1 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025. F3 · derivative.exercise_date: The options are fully vested. Read SEC document |
| August 04, 2026 Filed Aug 6, 2026 20:06 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | SaleCommon Stock | 48,000 | $45.71 | $2,194,080.00 |
DisclosureSEC source: 0002079445-26-000015 · wk-form4_1786046792.xml · nonDerivative · entry 2 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 387,414 F1 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025. F2 · price: This transaction was executed in multiple trades throughout the day at prices ranging from $45.09 to $46.78. 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 04, 2026 Filed Aug 6, 2026 20:06 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Exercise / conversionCommon Stock | 48,000 | $12.00 | $576,000.00 |
DisclosureSEC source: 0002079445-26-000015 · wk-form4_1786046792.xml · nonDerivative · entry 1 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 435,414 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 December 16, 2025. Read SEC document |
| July 02, 2026 Filed Jul 7, 2026 20:06 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative | 42,000 | $0.00 Strike: $12.00 | $0.00 |
DisclosureSEC source: 0001628280-26-047484 · wk-form4_1783454763.xml · derivative · entry 5 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 91,334 Underlying: Common Stock · 42,000 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. F1 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025. F3 · derivative.exercise_date: The options are fully vested. Read SEC document |
| July 02, 2026 Filed Jul 7, 2026 20:06 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative | 6,000 | $0.00 Strike: $12.00 | $0.00 |
DisclosureSEC source: 0001628280-26-047484 · wk-form4_1783454763.xml · derivative · entry 4 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 6,000 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. F1 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025. F3 · derivative.exercise_date: The options are fully vested. Read SEC document |
| July 02, 2026 Filed Jul 7, 2026 20:06 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | SaleCommon Stock | 48,000 | $41.22 | $1,978,560.00 |
DisclosureSEC source: 0001628280-26-047484 · wk-form4_1783454763.xml · nonDerivative · entry 3 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 387,414 F1 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025. F2 · price: This transaction was executed in multiple trades throughout the day at prices ranging from $39.79 to $41.79. 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 |
| July 02, 2026 Filed Jul 7, 2026 20:06 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Exercise / conversionCommon Stock | 42,000 | $12.00 | $504,000.00 |
DisclosureSEC source: 0001628280-26-047484 · wk-form4_1783454763.xml · nonDerivative · entry 2 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 435,414 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 December 16, 2025. Read SEC document |
| July 02, 2026 Filed Jul 7, 2026 20:06 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Exercise / conversionCommon Stock | 6,000 | $12.00 | $72,000.00 |
DisclosureSEC source: 0001628280-26-047484 · wk-form4_1783454763.xml · nonDerivative · entry 1 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 393,414 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 December 16, 2025. Read SEC document |
| June 16, 2026 Filed Jun 18, 2026 20:24 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | GrantNonqualified Stock Option (Right to Buy) · Derivative | 21,481 | $0.00 Strike: $40.24 | $0.00 |
DisclosureSEC source: 0002079445-26-000013 · wk-form4_1781814241.xml · derivative · entry 3 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 21,481 Underlying: Common Stock · 21,481 shares Expires 2036-06-15 F3 · derivative.exercise_date: 7,161 of the shares subject to this option will vest on June 16, 2027, 7,160 of the shares subject to this option will vest on June 16, 2028 and the remaining 7,160 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 20:24 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | GrantIncentive Stock Option (Right to Buy) · Derivative | 2,485 | $0.00 Strike: $40.24 | $0.00 |
DisclosureSEC source: 0002079445-26-000013 · wk-form4_1781814241.xml · derivative · entry 2 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 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 20:24 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | GrantCommon Stock | 23,298 | $0.00 | $0.00 |
DisclosureSEC source: 0002079445-26-000013 · wk-form4_1781814241.xml · nonDerivative · entry 1 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 387,414 F1 · shares: The amount represents restricted stock units ("RSUs") that vest as to 7,766 on June 16, 2027, 7,766 on June 16, 2028 and the remaining 7,766 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 |
| June 11, 2026 Filed Jun 12, 2026 20:16 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Tax withholdingCommon Stock | 32,565 | $40.79 | $1,328,326.35 |
DisclosureSEC source: 0002079445-26-000011 · wk-form4_1781295372.xml · nonDerivative · entry 1 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 364,116 F1 · kind: 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. Read SEC document |
| June 02, 2026 Filed Jun 4, 2026 20:40 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative | 48,000 | $0.00 Strike: $12.00 | $0.00 |
DisclosureSEC source: 0002079445-26-000009 · wk-form4_1780605637.xml · derivative · entry 3 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 6,000 Underlying: Common Stock · 48,000 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. F1 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025. F3 · derivative.exercise_date: The options are fully vested. Read SEC document |
| June 02, 2026 Filed Jun 4, 2026 20:40 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | SaleCommon Stock | 48,000 | $42.84 | $2,056,320.00 |
DisclosureSEC source: 0002079445-26-000009 · wk-form4_1780605637.xml · nonDerivative · entry 2 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 396,681 F1 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025. F2 · price: This transaction was executed in multiple trades throughout the day at prices ranging from $41.23 to $45.73. 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 02, 2026 Filed Jun 4, 2026 20:40 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Exercise / conversionCommon Stock | 48,000 | $12.00 | $576,000.00 |
DisclosureSEC source: 0002079445-26-000009 · wk-form4_1780605637.xml · nonDerivative · entry 1 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 444,681 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 December 16, 2025. Read SEC document |
| May 04, 2026 Filed May 5, 2026 11:32 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative | 48,000 | $0.00 Strike: $12.00 | $0.00 |
DisclosureSEC source: 0002079445-26-000007 · wk-form4_1777980770.xml · derivative · entry 3 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 54,000 Underlying: Common Stock · 48,000 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. F1 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025. F3 · derivative.exercise_date: The options are fully vested. Read SEC document |
| May 04, 2026 Filed May 5, 2026 11:32 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | SaleCommon Stock | 48,000 | $47.25 | $2,268,000.00 |
DisclosureSEC source: 0002079445-26-000007 · wk-form4_1777980770.xml · nonDerivative · entry 2 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 396,681 F1 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 16, 2025. F2 · price: This transaction was executed in multiple trades throughout the day at prices ranging from $46.80 to $47.71. The price reported above reflects the weighted average sale 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 |
| May 04, 2026 Filed May 5, 2026 11:32 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Exercise / conversionCommon Stock | 48,000 | $12.00 | $576,000.00 |
DisclosureSEC source: 0002079445-26-000007 · wk-form4_1777980770.xml · nonDerivative · entry 1 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 444,681 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 December 16, 2025. Read SEC document |
| March 17, 2026 Filed Mar 18, 2026 20:23 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Exercise / conversionNonqualified Stock Option (Right to Buy) · Derivative | 48,000 | $0.00 Strike: $12.00 | $0.00 |
DisclosureSEC source: 0001628280-26-019437 · wk-form4_1773865430.xml · derivative · entry 3 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 102,000 Underlying: Common Stock · 48,000 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_date: The options are fully vested. Read SEC document |
| March 17, 2026 Filed Mar 18, 2026 20:23 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | SaleCommon Stock | 48,000 | $39.74 | $1,907,520.00 |
DisclosureSEC source: 0001628280-26-019437 · wk-form4_1773865430.xml · nonDerivative · entry 2 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 396,681 F1 · kind: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the reporting person on December 16, 2025. F2 · price: This transaction was executed in multiple trades throughout the day at prices ranging from $39.51 to $39.94. The price reported above reflects the weighted average sale 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 |
| March 17, 2026 Filed Mar 18, 2026 20:23 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Exercise / conversionCommon Stock | 48,000 | $12.00 | $576,000.00 |
DisclosureSEC source: 0001628280-26-019437 · wk-form4_1773865430.xml · nonDerivative · entry 1 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 444,681 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 |
| February 18, 2026 Filed Feb 20, 2026 21:33 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Tax withholdingCommon Stock | 32,565 | $40.89 | $1,331,582.85 |
DisclosureSEC source: 0002079445-26-000005 · wk-form4_1771623186.xml · nonDerivative · entry 1 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 396,681 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. Read SEC document |
| February 10, 2026 Filed Feb 12, 2026 21:40 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Tax withholdingCommon Stock | 108,550 | $41.33 | $4,486,371.50 |
DisclosureSEC source: 0002079445-26-000003 · wk-form4_1770932433.xml · nonDerivative · entry 1 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 429,246 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. 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 | 150,000 | $0.00 Strike: $16.14 | $0.00 |
DisclosureSEC source: 0001628280-25-040796 · wk-form4_1755634063.xml · derivative · entry 18 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 150,000 Underlying: Common Stock · 150,000 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 / conversionNonqualified Stock Option (Right to Buy) · Derivative | 150,000 | $0.00 Strike: $16.14 | $0.00 |
DisclosureSEC source: 0001628280-25-040796 · wk-form4_1755634063.xml · derivative · entry 17 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Nonvoting Common Stock · 150,000 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 / conversionNonqualified Stock Option (Right to Buy) · Derivative | 130,290 | $0.00 Strike: $15.22 | $0.00 |
DisclosureSEC source: 0001628280-25-040796 · wk-form4_1755634063.xml · derivative · entry 16 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 130,290 Underlying: Common Stock · 130,290 shares Expires 2031-01-27 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 | 130,290 | $0.00 Strike: $15.22 | $0.00 |
DisclosureSEC source: 0001628280-25-040796 · wk-form4_1755634063.xml · derivative · entry 15 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Nonvoting Common Stock · 130,290 shares Expires 2031-01-27 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 | 200,000 | $0.00 Strike: $12.00 | $0.00 |
DisclosureSEC source: 0001628280-25-040796 · wk-form4_1755634063.xml · derivative · entry 14 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 200,000 Underlying: Common Stock · 200,000 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 | 200,000 | $0.00 Strike: $12.00 | $0.00 |
DisclosureSEC source: 0001628280-25-040796 · wk-form4_1755634063.xml · derivative · entry 13 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Nonvoting Common Stock · 200,000 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 | 133,334 | $0.00 Strike: $12.00 | $0.00 |
DisclosureSEC source: 0001628280-25-040796 · wk-form4_1755634063.xml · derivative · entry 12 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 133,334 Underlying: Common Stock · 133,334 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 | 133,334 | $0.00 Strike: $12.00 | $0.00 |
DisclosureSEC source: 0001628280-25-040796 · wk-form4_1755634063.xml · derivative · entry 11 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Nonvoting Common Stock · 133,334 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 | 150,000 | $0.00 Strike: $12.00 | $0.00 |
DisclosureSEC source: 0001628280-25-040796 · wk-form4_1755634063.xml · derivative · entry 10 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 150,000 Underlying: Common Stock · 150,000 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 | 150,000 | $0.00 Strike: $12.00 | $0.00 |
DisclosureSEC source: 0001628280-25-040796 · wk-form4_1755634063.xml · derivative · entry 9 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Nonvoting Common Stock · 150,000 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 | 19,710 | $0.00 Strike: $15.22 | $0.00 |
DisclosureSEC source: 0001628280-25-040796 · wk-form4_1755634063.xml · derivative · entry 8 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 19,710 Underlying: Common Stock · 19,710 shares Expires 2031-01-27 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 | 19,710 | $0.00 Strike: $15.22 | $0.00 |
DisclosureSEC source: 0001628280-25-040796 · wk-form4_1755634063.xml · derivative · entry 7 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Nonvoting Common Stock · 19,710 shares Expires 2031-01-27 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 | 16,666 | $0.00 Strike: $12.00 | $0.00 |
DisclosureSEC source: 0001628280-25-040796 · wk-form4_1755634063.xml · derivative · entry 6 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 16,666 Underlying: Common Stock · 16,666 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 | 16,666 | $0.00 Strike: $12.00 | $0.00 |
DisclosureSEC source: 0001628280-25-040796 · wk-form4_1755634063.xml · derivative · entry 5 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Nonvoting Common Stock · 16,666 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 | ConversionNonvoting Common Stock · Derivative | 387,296 | $0.00 | $0.00 |
DisclosureSEC source: 0001628280-25-040796 · wk-form4_1755634063.xml · derivative · entry 4 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 387,296 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 387,296 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 387,296 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 387,296 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 387,296 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 | ConversionSeries B Preferred Stock · Derivative | 500 | $0.00 | $0.00 |
DisclosureSEC source: 0001628280-25-040796 · wk-form4_1755634063.xml · derivative · entry 3 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 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, held jointly with his spouse with right of survivorship, 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, held jointly with his spouse with right of survivorship, 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, held jointly with his spouse with right of survivorship, 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, held jointly with his spouse with right of survivorship, 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 | ConversionCommon Stock | 387,296 | Not disclosed | Not disclosed |
DisclosureSEC source: 0001628280-25-040796 · wk-form4_1755634063.xml · nonDerivative · entry 2 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 537,796 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 387,296 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 387,296 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 |
DisclosureSEC source: 0001628280-25-040796 · wk-form4_1755634063.xml · nonDerivative · entry 1 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 537,796 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, held jointly with his spouse with right of survivorship, 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, held jointly with his spouse with right of survivorship, 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 20:49 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Tax withholdingNonvoting Common Stock · Derivative | 21,710 | $23.00 | $499,330.00 |
DisclosureSEC source: 0001628280-25-040562 · wk-form4_1755290943.xml · derivative · entry 1 Schafer Douglas M. JR · CIK 0002079445 · EVP and CIO 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 387,296 Underlying: Common Stock · 21,710 shares Expires not disclosed F1 · derivative.exercise_price: The shares of nonvoting common stock are convertible on a one-for-one basis into shares of common stock commencing at any time. The nonvoting common stock has no expiration date. F2 · shares: Represents shares that have been withheld by 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 F1 · derivative.exercise_date: The shares of nonvoting common stock are convertible on a one-for-one basis into shares of common stock commencing at any time. The nonvoting common stock has no expiration date. F1 · derivative.expiration_date: The shares of nonvoting common stock are convertible on a one-for-one basis into shares of common stock commencing at any time. The nonvoting common stock has 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.