Lance Emmons - Aug 14, 2025 Form 4 Insider Report for MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX)

Role
EVP and CFO
Signature
/s/Alessandra Maria Corona Henriques, Attorney-in-Fact
Stock symbol
MIAX
Transactions as of
Aug 14, 2025
Transactions value $
$126
Form type
4
Date filed
8/18/2025, 04:05 PM
Previous filing
Aug 13, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Emmons Lance EVP and CFO C/O MIAMI INTERNATIONAL HOLDINGS, INC., 7 ROSZEL ROAD, SUITE 1A, PRINCETON /s/Alessandra Maria Corona Henriques, Attorney-in-Fact 2025-08-18 0002080679

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MIAX Common Stock Conversion of derivative security +57.6K +157.89% 94.2K Aug 15, 2025 Direct F1
transaction MIAX Common Stock Purchase $126 +4 $31.44 4 Aug 14, 2025 By son F2

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 Series B Preferred Stock Conversion of derivative security $0 -57.6K -100% $0.00 0 Aug 15, 2025 Common Stock 57.6K Direct F1
transaction MIAX Incentive Stock Option (Right to Buy) Options Exercise $0 -22.2K -100% $0.00 0 Aug 15, 2025 Nonvoting Common Stock 22.2K $13.50 Direct F3, F4
transaction MIAX Incentive Stock Option (Right to Buy) Options Exercise $0 +22.2K $0.00 22.2K Aug 15, 2025 Common Stock 22.2K $13.50 Direct F3, F4
transaction MIAX Incentive Stock Option (Right to Buy) Options Exercise $0 -6.2K -100% $0.00 0 Aug 15, 2025 Nonvoting Common Stock 6.2K $16.14 Direct F3, F4
transaction MIAX Incentive Stock Option (Right to Buy) Options Exercise $0 +6.2K $0.00 6.2K Aug 15, 2025 Common Stock 6.2K $16.14 Direct F3, F4
transaction MIAX Nonqualified Stock Option (Right to Buy) Options Exercise $0 -103K -100% $0.00 0 Aug 15, 2025 Nonvoting Common Stock 103K $13.50 Direct F3, F4
transaction MIAX Nonqualified Stock Option (Right to Buy) Options Exercise $0 +103K $0.00 103K Aug 15, 2025 Common Stock 103K $13.50 Direct F3, F4
transaction MIAX Nonqualified Stock Option (Right to Buy) Options Exercise $0 -125K -100% $0.00 0 Aug 15, 2025 Nonvoting Common Stock 125K $15.22 Direct F3, F4
transaction MIAX Nonqualified Stock Option (Right to Buy) Options Exercise $0 +125K $0.00 125K Aug 15, 2025 Common Stock 125K $15.22 Direct F3, F4
transaction MIAX Nonqualified Stock Option (Right to Buy) Options Exercise $0 -68.8K -100% $0.00 0 Aug 15, 2025 Nonvoting Common Stock 68.8K $16.14 Direct F3, F4
transaction MIAX Nonqualified Stock Option (Right to Buy) Options Exercise $0 +68.8K $0.00 68.8K Aug 15, 2025 Common Stock 68.8K $16.14 Direct F3, F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Includes 57,646 shares of Series B Preferred Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's initial public offering ("IPO") and which have no expiration date.
F2 Mr. Emmons disclaims ownership of the shares owned by his son.
F3 The options were granted initially as the right to buy Nonvoting Common Stock. On the closing date of the IPO, these converted to the right to buy Common Stock instead of Nonvoting Common Stock, for the same price and under the same conditions.
F4 The options are fully vested.