GALLAGHER THOMAS P. (Chairman & CEO) sold 31.6% of their position (224.03K shares) of MIAMI INTERNATIONAL HOLDINGS, INC. on the open market
Open‑market sale worth $9.73M — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.
S · 3 sales
Filed: 4/17/2026ACC: 0001628280-26-025753
DirectorOfficer· Chairman & CEO
Since Feb 2026
-224.03K
Net shares
Net seller
$9.73M
Total sold
3
Open market trades
0B · 3S
5
Total transactions
70K acquired · 294.03K disposed
Non-Derivative Transactions4
Common Stock
Indirect
Shares
+70K
Price / share
$12.00
Trade value
$840.01K
% of position
3.8%
4/15/2026
1.83M→1.90M
Common Stock
Indirect
Shares
−70K
Price / share
$43.36
Trade value
$3.04M
% of position
3.7%
4/15/2026
1.90M→1.83M
Common Stock
Indirect
Shares
−104.12K
Price / share
$43.36
Trade value
$4.51M
% of position
5.7%
4/15/2026
1.83M→1.72M
Common Stock
Direct
Shares
−49.90K
Price / share
$43.68
Trade value
$2.18M
% of position
9.3%
4/15/2026
535.86K→485.96K
Total
Net shares
−154.02K
Net value
-$8.89M
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common Stock Indirect | 4/15/2026 | M · Option Exercise | +70K | $12.00 | $840.01K | 3.8% | 1.83M | 1.90M |
| Common Stock Indirect | 4/15/2026 | S · Sale | −70K | $43.36 | $3.04M | 3.7% | 1.90M | 1.83M |
| Common Stock Indirect | 4/15/2026 | S · Sale | −104.12K | $43.36 | $4.51M | 5.7% | 1.83M | 1.72M |
| Common Stock Direct | 4/15/2026 | S · Sale | −49.90K | $43.68 | $2.18M | 9.3% | 535.86K | 485.96K |
| Total | −154.02K | -$8.89M | ||||||
Derivative Transactions1
Nonqualified Stock Option (Right to Buy)
Indirect
Converts to
Common Stock
70K shares
Shares
−70K
Strike price
12
Held after
280K
Exercisable
—
4/15/2026
| Security | Converts To | Date | Type | Shares | Strike Price | Exercisable | Held After |
|---|---|---|---|---|---|---|---|
| Nonqualified Stock Option (Right to Buy) Indirect | Common Stock70K shares | 4/15/2026 | M · Option Exercise | −70K | 12 | — | 280K |