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4//SEC Filing

BROWN DAVID A 4

Accession 0001628280-25-040791

CIK 0001438472other

View on SEC.gov Company Profile

Filed

Aug 18, 8:00 PM ET

Accepted

Aug 19, 4:07 PM ET

Size

16.2 KB

Accession

0001628280-25-040791

Insider Transaction Report

Form 4

Period: 2025-08-15

MIAMI INTERNATIONAL HOLDINGS, INC.MIAX

Director

Transactions

Exercise/Conversion
Stock Option (Right to Buy)
2025-08-15+18,750→ 18,750 total
Exercise: $16.14Exp: 2031-05-31→ Common Stock (18,750 underlying)
Exercise/Conversion
Stock Option (Right to Buy)
2025-08-15+7,500→ 7,500 total
Exercise: $16.14Exp: 2031-05-31→ Common Stock (7,500 underlying)
Exercise/Conversion
Stock Option (Right to Buy)
2025-08-15−278→ 278 total
Exercise: $16.14Exp: 2031-05-31→ Common Stock (278 underlying)
Exercise/Conversion
Stock Option (Right to Buy)
2025-08-15−278→ 0 total
Exercise: $16.14Exp: 2031-08-31→ Nonvoting Common Stock (278 underlying)
Exercise/Conversion
Stock Option (Right to Buy)
2025-08-15−18,750→ 0 total
Exercise: $16.14Exp: 2031-05-31→ Nonvoting Common Stock (18,750 underlying)
Exercise/Conversion
Stock Option (Right to Buy)
2025-08-15−7,500→ 0 total
Exercise: $16.14Exp: 2031-07-31→ Nonvoting Common Stock (7,500 underlying)

Footnotes (2)

[F1]The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the initial public offering, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.
[F2]The options are fully vested.

Documents

1 file

4
wk-form4_1755634019.xmlPrimary
FORM 4

Issuer

MIAMI INTERNATIONAL HOLDINGS, INC.

CIK 0001438472

Entity typeother

Related Parties

1

filerCIK 0001394399

Filing Metadata

Form type: 4
Filed: Aug 18, 8:00 PM ET
Accepted: Aug 19, 4:07 PM ET
Size: 16.2 KB

View on SEC.gov