Miami International Holdings, Inc. MIAX
We take great care to ensure that the data presented and summarized in this overview for MIAMI INTERNATIONAL HOLDINGS, INC. is accurate and up-to-date, based on a comprehensive analysis of 13F filing forms for institutional ownership and form 4 filings for insider transactions. Please note that this data may differ from other sources and should not be relied upon as the sole basis for investment decisions.
Latest Institutional Activity in MIAX
Top Purchases
Top Sells
About MIAX
Insider Transactions at MIAX
Insider Transaction List
View all| Date | Insider | Transaction | Ownership Type | Shares Traded | Value / Price |
|---|---|---|---|---|---|
|
Dec 23
2025
|
Thomas P. Gallagher Chairman & CEO |
SELL
Bona fide gift
|
Direct |
2,000
-0.34%
|
-
|
|
Dec 16
2025
|
Lance Emmons EVP and CFO |
BUY
Exercise of conversion of derivative security
|
Direct |
33,456
+8.21%
|
$535,296
$16.49 P/Share
|
|
Dec 16
2025
|
Shelly Brown EVP, Chief Strategy Officer |
BUY
Exercise of conversion of derivative security
|
Direct |
33,332
+3.2%
|
$399,984
$12.0 P/Share
|
|
Dec 12
2025
|
Murray Stahl Director |
BUY
Open market or private purchase
|
Indirect |
2,439
+0.05%
|
$99,999
$41.0 P/Share
|
|
Oct 03
2025
|
Murray Stahl Director |
BUY
Open market or private purchase
|
Indirect |
2
|
$82
$41.97 P/Share
|
|
Sep 26
2025
|
Murray Stahl Director |
BUY
Open market or private purchase
|
Indirect |
4
+0.0%
|
$164
$41.76 P/Share
|
|
Sep 11
2025
|
John Smollen EVP Traded Products & Relation |
BUY
Exercise of conversion of derivative security
|
Direct |
150,000
+26.18%
|
$1,800,000
$12.0 P/Share
|
|
Sep 11
2025
|
John Smollen EVP Traded Products & Relation |
SELL
Payment of exercise price or tax liability
|
Direct |
52,054
-26.95%
|
$1,925,998
$37.39 P/Share
|
|
Sep 11
2025
|
Edward Deitzel EVP, CRO, CCO MIAX Exchanges |
BUY
Exercise of conversion of derivative security
|
Direct |
16,666
+11.94%
|
$199,992
$12.0 P/Share
|
|
Sep 10
2025
|
Shelly Brown EVP, Chief Strategy Officer |
SELL
Payment of exercise price or tax liability
|
Direct |
16,283
-4.96%
|
$586,188
$36.81 P/Share
|
|
Sep 09
2025
|
Harish Jayabalan EVP, CISO and CRO |
SELL
Payment of exercise price or tax liability
|
Direct |
1,980
-2.63%
|
$73,260
$37.3 P/Share
|
|
Sep 09
2025
|
Harish Jayabalan EVP, CISO and CRO |
BUY
Exercise of conversion of derivative security
|
Direct |
25,000
+13.57%
|
$300,000
$12.0 P/Share
|
|
Sep 09
2025
|
Edward Deitzel EVP, CRO, CCO MIAX Exchanges |
SELL
Payment of exercise price or tax liability
|
Direct |
38,090
-26.38%
|
$1,409,330
$37.3 P/Share
|
|
Sep 09
2025
|
Edward Deitzel EVP, CRO, CCO MIAX Exchanges |
BUY
Exercise of conversion of derivative security
|
Direct |
62,500
+30.21%
|
$750,000
$12.0 P/Share
|
|
Aug 28
2025
|
Murray Stahl Director |
BUY
Open market or private purchase
|
Indirect |
34,470
+0.75%
|
$1,240,920
$36.1 P/Share
|
|
Aug 26
2025
|
Shelly Brown EVP, Chief Strategy Officer |
SELL
Payment of exercise price or tax liability
|
Direct |
11,047
-3.26%
|
$364,551
$33.9 P/Share
|
|
Aug 26
2025
|
Thomas P. Gallagher Chairman & CEO |
SELL
Payment of exercise price or tax liability
|
Indirect |
192,220
-9.42%
|
$6,343,260
$33.9 P/Share
|
|
Aug 15
2025
|
Cynthia Schwarzkopf Director |
BUY
Conversion of derivative security
|
Direct |
81,308
+33.25%
|
-
|
|
Aug 15
2025
|
Mark F. Raymond Director |
BUY
Conversion of derivative security
|
Direct |
43,827
+33.03%
|
-
|
|
Aug 15
2025
|
Judson Gray Teekell Director |
BUY
Conversion of derivative security
|
Indirect |
68,131
+28.16%
|
-
|
Last 12 Months Summary
Buy / Acquisition
2.81M
Shares
From
30
Insiders
| Open market or private purchase | 74.5K shares |
|---|---|
| Conversion of derivative security | 2.41M shares |
| Exercise of conversion of derivative security | 321K shares |
Sell / Disposition
602K
Shares
From
7
Insiders
| Payment of exercise price or tax liability | 600K shares |
|---|---|
| Bona fide gift | 2K shares |