Arkolith/Insider Trading/MIAX/Form 4

Gallagher Thomas P.

Chairman & CEO, DirectorMIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) · full profile →Form 4 · filed Jul 7, 2026
Net Selling
Open-Market Buys
$0
Open-Market Sells
$3.0M
Net Open-Market Flow
-$3.0M
Transactions
6
4 non-derivative · 2 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Jul 7, 2026Option exercise(M)28K$12.00$339K1.8M
Jul 7, 2026Sell(S)28K$42.27$1.2M1.7M
Jul 6, 2026Option exercise(M)42K$12.00$501K1.8M
Jul 6, 2026Sell(S)42K$42.09$1.8M1.7M

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
Jul 7, 2026Option exercise(M)28K—$070K
Jul 6, 2026Option exercise(M)42K—$098K

Transaction Codes

M
Option exercise / conversion
S
Open-market sale

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001628280-26-047530) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML