Horizon Kinetics Asset Management Llc - Aug 14, 2025 SCHEDULE 13D Report for MIAMI INTERNATIONAL HOLDINGS, INC. Common Stock (MIAX)

Filing Manager: HORIZON KINETICS ASSET MANAGEMENT LLC
Reporting Manager: HORIZON KINETICS ASSET MANAGEMENT LLC
Security: MIAMI INTERNATIONAL HOLDINGS, INC. Common Stock
Symbol: MIAX
Shares outstanding: 81.1M shares
Disclosed Ownership: 8.68M shares
Ownership: 10.7%
Form type: SCHEDULE 13D
Date filed: 8/21/2025, 02:46 PM
Date of event: Aug 14, 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
HORIZON KINETICS ASSET MANAGEMENT LLC	10.7%	8.68M	8.68M	0	/s/Jay Kesslen	Jay Kesslen, General Counsel	0001056823