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$MIAX All transactions

MIAMI INTERNATIONAL HOLDINGS, INC.

M

$ Value

$0

Shares

241,667

Price

$0

Filed

Aug 19

Insider

Name

Gallagher Thomas P.

Title

Chairman & CEO

CIK

0002080477

Roles

Director Officer

Transaction Details

Transaction Date

2025-08-15

Code

M

Table

Derivative

Ownership

Indirect

Equity Swap

No

Shares After

Footnotes

Represents 500 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. | Mr. Gallagher maintains beneficial ownership, including dispositive and voting control, over Gallagher Investments, LLC | Represents 573,963 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. | Includes 12,000 shares of common stock jointly with his spouse with right of survival | Represents 135,395 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. | 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. | The options are fully vested.

Filing Info

Accession No.

0001628280-25-040785

Form Type

4

Issuer CIK

0001438472

Gallagher Thomas P.'s History

Date Ticker Type Value
2026-04-15 MIAX M $840K
2026-04-15 MIAX $3.0M
2026-04-15 MIAX $4.5M
2026-04-15 MIAX $2.2M
2026-04-15 MIAX M $0
2026-03-30 MIAX F $783K
2025-12-23 MIAX G
2025-08-26 MIAX F $6.5M
2025-08-15 MIAX C
2025-08-15 MIAX C

Other Insiders at MIAX (90d)

Insider Bought Sold Last
Teekell Judson Gray $120K 2026-04-02
Gallagher Thomas P.
Chairman & CEO
$9.7M 2026-04-15
Brown Shelly
EVP, Chief Strategy Officer
$1.8M 2026-04-08
Beckelman John 2026-04-09
Deitzel Edward
EVP, CRO, CCO MIAX Exchanges
$518K 2026-04-08
Emmons Lance
EVP and CFO
2026-03-30
Smollen John
EVP, New Product Development
2026-03-30
Comly Barbara J.
EVP, GC & Corporate Secretary
$1.3M 2026-04-15