SEC Form 4 · accession 0001628280-26-047497

MIAMI INTERNATIONAL HOLDINGS, INC. · MIAX

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Officer — EVP, CISO and CRO

Period of report

Jul 6, 2026

Accepted (ET)

Jul 7, 2026 · 4:14 pm EDT

Rule 10b5-1 plan

yes — trade under a plan

Issuer CIK

0001438472

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I
Common Stock	Jul 6, 2026	M	834	$12.00	A	78,899	D
Common Stock	Jul 6, 2026	M	16,667	$12.00	A	95,566	D
Common Stock	Jul 6, 2026	M	2,499	$12.00	A	98,065	D
Common Stock^F2	Jul 6, 2026	S	20,000	$42.12	D	78,065	D

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Nonqualified Stock Option (Right to Buy)^F3	$12.00	Jul 6, 2026	M	834	D	—	Oct 12, 2027	Common Stock	834	0	D
Nonqualified Stock Option (Right to Buy)^F3	$12.00	Jul 6, 2026	M	16,667	D	—	May 17, 2028	Common Stock	16,667	0	D
Nonqualified Stock Option (Right to Buy)^F3	$12.00	Jul 6, 2026	M	2,499	D	—	Jul 31, 2029	Common Stock	2,499	14,168	D

F1This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on March 9, 2026.
F2This transaction was executed in multiple trades throughout the day at prices ranging from $42.00 to $42.32. The price reported above reflects the weighted average sales price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
F3The options are fully vested.