Kenneth W. Lozier - Aug 13, 2025 Form 3 Insider Report for MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX)

Role
Director
Signature
/s/Alessandra Maria Corona Henriques, Attorney-in-Fact
Stock symbol
MIAX
Transactions as of
Aug 13, 2025
Transactions value $
$0
Form type
3
Date filed
8/13/2025, 05:10 PM
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Lozier Kenneth W. Director C/O MIAMI INTERNATIONAL HOLDINGS, INC., 7 ROSZEL ROAD, SUITE 1A, PRINCETON /s/Alessandra Maria Corona Henriques, Attorney-in-Fact 2025-08-13 0002080877

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
holding MIAX Stock Option (Right to Buy) Aug 13, 2025 Common Stock 449 $20.60 Direct F1
holding MIAX Stock Option (Right to Buy) Aug 13, 2025 Common Stock 5.29K $21.32 Direct F1
holding MIAX Stock Option (Right to Buy) Aug 13, 2025 Common Stock 8.31K $22.34 Direct F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The options are fully vested.
F2 4,154 of the shares subject to this option are vested and 2,076 will vest on December 31, 2025, subject to the reporting person's continued service to the Issuer or its subsidiaries through the applicable vesting date.

Remarks:

See Exhibit 24.1 - Power of Attorney