Kurt M. Eckert - Aug 15, 2025 Form 4 Insider Report for MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX)

Role
Director
Signature
/s/Alessandra Maria Corona Henriques, Attorney-in-Fact
Stock symbol
MIAX
Transactions as of
Aug 15, 2025
Transactions value $
$0
Form type
4
Date filed
8/19/2025, 04:06 PM
Previous filing
Aug 13, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Eckert Kurt M. Director C/O MIAMI INTERNATIONAL HOLDINGS, INC., 7 ROSZEL ROAD, SUITE 1A, PRINCETON /s/Alessandra Maria Corona Henriques, Attorney-in-Fact 2025-08-19 0002080678

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MIAX Common Stock Conversion of derivative security +46.9K +38.9% 167K Aug 15, 2025 Direct F1

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 Nonvoting Common Stock Conversion of derivative security $0 -46.9K -100% $0.00 0 Aug 15, 2025 Common Stock 46.9K Direct F1
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -12.9K -100% $0.00 0 Aug 15, 2025 Nonvoting Common Stock 12.9K $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +12.9K $0.00 12.9K Aug 15, 2025 Common Stock 12.9K $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -17.2K -100% $0.00 0 Aug 15, 2025 Nonvoting Common Stock 17.2K $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +17.2K $0.00 17.2K Aug 15, 2025 Common Stock 17.2K $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -18K -100% $0.00 0 Aug 15, 2025 Nonvoting Common Stock 18K $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +18K $0.00 18K Aug 15, 2025 Common Stock 18K $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -22.8K -100% $0.00 0 Aug 15, 2025 Nonvoting Common Stock 22.8K $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +22.8K $0.00 22.8K Aug 15, 2025 Common Stock 22.8K $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -125 -100% $0.00 0 Aug 15, 2025 Nonvoting Common Stock 125 $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +125 $0.00 125 Aug 15, 2025 Common Stock 125 $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -30.2K -100% $0.00 0 Aug 15, 2025 Nonvoting Common Stock 30.2K $14.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +30.2K $0.00 30.2K Aug 15, 2025 Common Stock 30.2K $14.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -22.2K -100% $0.00 0 Aug 15, 2025 Nonvoting Common Stock 22.2K $16.14 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +22.2K $0.00 22.2K Aug 15, 2025 Common Stock 22.2K $16.14 Direct F2, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Includes 46,875 shares of Nonvoting Common 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. Of his 46,875 shares of Nonvoting Common Stock, (i) 15,375 are held in his individual name and (ii) 31,500 are held jointly with his spouse with right of survivorship
F2 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.
F3 The options are fully vested