Shelly Brown - 16 Dec 2025 Form 4 Insider Report for MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX)

Role
EVP, Chief Strategy Officer
Signature
/s/ Barbara J. Comly, Attorney-in-fact
Issuer symbol
MIAX
Transactions as of
16 Dec 2025
Net transactions value
+$399,984
Form type
4
Filing time
17 Dec 2025, 16:23:25 UTC
Previous filing
11 Sep 2025
Next filing
20 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Brown Shelly EVP, Chief Strategy Officer C/O MIAMI INTERNATIONAL HOLDINGS, INC., 7 ROSZEL ROAD, SUITE 1A, PRINCETON /s/ Barbara J. Comly, Attorney-in-fact 17 Dec 2025 0002080506

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MIAX Common Stock Options Exercise $199,992 +16,666 +5.3% $12.00 328,365 16 Dec 2025 Direct
transaction MIAX Common Stock Options Exercise $99,996 +8,333 +2.5% $12.00 336,698 16 Dec 2025 Direct
transaction MIAX Common Stock Options Exercise $99,996 +8,333 +2.5% $12.00 345,031 16 Dec 2025 Direct

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 Incentive Stock Option (Right to Buy) Options Exercise $0 -16,666 -100% $0.000000 0 16 Dec 2025 Common Stock 16,666 $12.00 Direct F1
transaction MIAX Incentive Stock Option (Right to Buy) Options Exercise $0 -8,333 -100% $0.000000 0 16 Dec 2025 Common Stock 8,333 $12.00 Direct F1
transaction MIAX Incentive Stock Option (Right to Buy) Options Exercise $0 -8,333 -100% $0.000000 0 16 Dec 2025 Common Stock 8,333 $12.00 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The options are fully vested.