Thomas P. Gallagher - 23 Dec 2025 Form 4 Insider Report for MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX)

Role
Chairman & CEO, Director
Signature
/s/ Barbara J. Comly, Attorney-in-fact
Issuer symbol
MIAX
Transactions as of
23 Dec 2025
Net transactions value
$0
Form type
4
Filing time
29 Dec 2025, 08:46:55 UTC
Previous filing
28 Aug 2025
Next filing
12 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Gallagher Thomas P. Chairman & CEO, Director C/O MIAMI INTERNATIONAL HOLDINGS, INC, 7 ROSZEL ROAD, SUITE 1A, PRINCETON /s/ Barbara J. Comly, Attorney-in-fact 29 Dec 2025 0002080477

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MIAX Common Stock Gift -2,000 -0.34% 585,963 23 Dec 2025 Direct F1, F2, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Bona fide gift by Reporting Person of 2,000 shares of common stock to his son. The shares are subject to a lockup agreement entered into by the Reporting Person on December 11, 2025 (the "Lock-up Agreement"). The transferee has agreed to be bound by the terms of the Lock-up Agreement.
F2 Price is not applicable to acquisitions or dispositions resulting from bona fide gifts.
F3 Includes 12,000 shares of common stock, which are held jointly with the Reporting Person's spouse with right of survival.