Cees Vermaas - Aug 13, 2025 Form 4 Insider Report for MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX)

Role: CEO of TISEG
Signature: /s/Alessandra Maria Corona Henriques, Attorney-in-Fact
Stock symbol: MIAX
Transactions as of: Aug 13, 2025
Transactions value $: $0
Form type: 4
Date filed: 8/15/2025, 04:48 PM
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Vermaas Cees	CEO of TISEG	C/O MIAMI INTERNATIONAL HOLDINGS, INC., 7 ROSZEL ROAD, SUITE 1A, PRINCETON	/s/Alessandra Maria Corona Henriques, Attorney-in-Fact	2025-08-13	0002080668

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
transaction	MIAX	Nonqualified Stock Option (Right to Buy)	Award	$0	+15K		$0.00	15K	Aug 13, 2025	Common Stock	15K	$23.00	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	5,000 of the shares subject to this option will vest on each of August 13, 2026, August 13, 2027 and August 13, 2028, subject to the reporting person's continued service to the Issuer or its subsidiaries through the applicable vesting date.