Thomas P. Gallagher - Aug 14, 2025 SCHEDULE 13D Report for Miami International Holdings, Inc. (the "Issuer") Common Stock, $0.001 par value per share (the "Common Stock")

Filing Manager: Thomas P. Gallagher
Reporting Manager: Thomas P. Gallagher
Security: Miami International Holdings, Inc. (the "Issuer") Common Stock, $0.001 par value per share (the "Common Stock")
Shares outstanding: 82.9M shares
Disclosed Ownership: 4.23M shares
Ownership: 5.1%
Form type: SCHEDULE 13D
Date filed: 8/21/2025, 04:24 PM
Date of event: Aug 14, 2025
Next filing: Aug 28, 2025
SEC: View on sec.gov

Reporting Managers (2)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
Thomas P. Gallagher	5.1%	4.23M	649K	3.58M	Thomas P. Gallagher	/s/ Thomas P. Gallagher, Individually	0002080477
Gallagher Investments LLC	4.3%	3.58M	0	3.58M	Gallagher Investments LLC	/s/ Thomas P. Gallagher, Manager