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

Role
Director
Signature
/s/Alessandra Maria Corona Henriques, Attorney-in-Fact
Issuer symbol
MIAX
Transactions as of
15 Aug 2025
Net transactions value
$0
Form type
4
Filing time
19 Aug 2025, 16:06:15 UTC
Previous filing
13 Aug 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 19 Aug 2025 0002080678

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MIAX Common Stock Conversion of derivative security +46,875 +39% 167,375 15 Aug 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 -46,875 -100% $0.000000 0 15 Aug 2025 Common Stock 46,875 Direct F1
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -12,917 -100% $0.000000 0 15 Aug 2025 Nonvoting Common Stock 12,917 $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +12,917 $0.000000 12,917 15 Aug 2025 Common Stock 12,917 $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -17,188 -100% $0.000000 0 15 Aug 2025 Nonvoting Common Stock 17,188 $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +17,188 $0.000000 17,188 15 Aug 2025 Common Stock 17,188 $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -18,000 -100% $0.000000 0 15 Aug 2025 Nonvoting Common Stock 18,000 $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +18,000 $0.000000 18,000 15 Aug 2025 Common Stock 18,000 $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -22,812 -100% $0.000000 0 15 Aug 2025 Nonvoting Common Stock 22,812 $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +22,812 $0.000000 22,812 15 Aug 2025 Common Stock 22,812 $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -125 -100% $0.000000 0 15 Aug 2025 Nonvoting Common Stock 125 $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +125 $0.000000 125 15 Aug 2025 Common Stock 125 $12.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -30,156 -100% $0.000000 0 15 Aug 2025 Nonvoting Common Stock 30,156 $14.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +30,156 $0.000000 30,156 15 Aug 2025 Common Stock 30,156 $14.00 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -22,223 -100% $0.000000 0 15 Aug 2025 Nonvoting Common Stock 22,223 $16.14 Direct F2, F3
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +22,223 $0.000000 22,223 15 Aug 2025 Common Stock 22,223 $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