Cynthia Schwarzkopf - 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, 16:05:24 UTC
Previous filing
13 Aug 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Schwarzkopf Cynthia Director C/O MIAMI INTERNATIONAL HOLDINGS, INC., 7 ROSZEL ROAD, SUITE 1A, PRINCETON /s/Alessandra Maria Corona Henriques, Attorney-in-Fact 19 Aug 2025 0002080596

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MIAX Common Stock Conversion of derivative security +36,250 +80% 81,308 15 Aug 2025 Direct F1, F2
transaction MIAX Common Stock Conversion of derivative security +45,058 +124% 81,308 15 Aug 2025 Direct F1, 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 -36,250 -100% $0.000000 0 15 Aug 2025 Common Stock 36,250 Direct F1
transaction MIAX Nonvoting Common Stock Conversion of derivative security $0 -45,058 -100% $0.000000 0 15 Aug 2025 Common Stock 45,058 Direct F2
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -19,500 -100% $0.000000 0 15 Aug 2025 Nonvoting Common Stock 19,500 $12.00 Direct F3, F4
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +19,500 $0.000000 19,500 15 Aug 2025 Common Stock 19,500 $12.00 Direct F3, F4
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -21,916 -100% $0.000000 0 15 Aug 2025 Nonvoting Common Stock 21,916 $12.00 Direct F3, F4
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +21,916 $0.000000 21,916 15 Aug 2025 Common Stock 21,916 $12.00 Direct F3, F4
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -21,250 -100% $0.000000 0 15 Aug 2025 Nonvoting Common Stock 21,250 $12.00 Direct F3, F4
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +21,250 $0.000000 21,250 15 Aug 2025 Common Stock 21,250 $12.00 Direct F3, F4
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -22,708 -100% $0.000000 0 15 Aug 2025 Nonvoting Common Stock 22,708 $12.00 Direct F3, F4
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +22,708 $0.000000 22,708 15 Aug 2025 Common Stock 22,708 $12.00 Direct F3, F4
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -28,437 -100% $0.000000 0 15 Aug 2025 Nonvoting Common Stock 28,437 $14.00 Direct F3, F4
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +28,437 $0.000000 28,437 15 Aug 2025 Common Stock 28,437 $14.00 Direct F3, F4
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 -32,501 -100% $0.000000 0 15 Aug 2025 Nonvoting Common Stock 32,501 $16.14 Direct F3, F4
transaction MIAX Stock Option (Right to Buy) Options Exercise $0 +32,501 $0.000000 32,501 15 Aug 2025 Common Stock 32,501 $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 36,250 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 Includes 45,058 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 IPO and which have no expiration date.
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.