InsiderFlow

MIAX

Miami International Holdings, Inc. $42.25+0.95 (+2.30%)
Prev Close$41.30·MCap$4.10B·P/E24.04·Vol666.2K·Yield

Buys (12M)

13

$2.44M

Sells (12M)

43

$54.09M

Net Activity

Net Seller

$51.65M

Active Insiders

21

last 12 mo

Over the past 12 months, insider activity at Miami International Holdings, Inc. (MIAX) has been dominated by selling, with 13 insider purchases totaling $2.44M and 43 insider sales totaling $54.09M. The most recent insider transaction was by Gallagher Thomas P. (director, officer: Chairman & CEO), who sold $2.98M worth of shares on Jul 14, 2026. Miami International Holdings, Inc. operates in the Financial Services sector, within the Financial - Capital Markets industry, with a market cap of $4.10B.

MIAX Insider Trading Activity

DateInsiderTypeValue
Jul 14, 2026 Gallagher Thomas P.Sell$2.98M
Jul 14, 2026 Comly Barbara J.Sell$1.18M
Jul 7, 2026 Comly Barbara J.Sell$1.15M
Jul 7, 2026 Schafer Douglas M. JRSell$1.98M
Jul 7, 2026 Brown ShellySell$674.1K
Jul 7, 2026 Gallagher Thomas P.Sell$2.95M
Jul 7, 2026 Deitzel EdwardSell$462.4K
Jul 7, 2026 Jayabalan HarishSell$842.4K
Jul 7, 2026 Eckert Kurt M.Sell$206.6K
Jul 7, 2026 Teekell Judson GraySell$120.0K
Jun 17, 2026 Brown ShellySell$208.5K
Jun 12, 2026 Schwarzkopf CynthiaSell$813.7K
Jun 10, 2026 Jayabalan HarishSell$801.6K
Jun 4, 2026 Eckert Kurt M.Sell$224.5K
Jun 4, 2026 Deitzel EdwardSell$463.8K
Jun 4, 2026 Brown ShellySell$673.9K
Jun 4, 2026 Comly Barbara J.Sell$1.20M
Jun 4, 2026 Gallagher Thomas P.Sell$2.97M
Jun 4, 2026 Teekell Judson GraySell$128.3K
Jun 4, 2026 Schafer Douglas M. JRSell$2.06M
May 18, 2026 Emmons LanceSell$1.97M
May 7, 2026 Gallagher Thomas P.Sell$755.7K
May 5, 2026 Brown ShellySell$756.5K
May 5, 2026 Teekell Judson GraySell$141.9K
May 5, 2026 Comly Barbara J.Sell$1.32M
May 5, 2026 Schafer Douglas M. JRSell$2.27M
May 5, 2026 Eckert Kurt M.Sell$266.0K
May 5, 2026 Gallagher Thomas P.Sell$2.56M
May 5, 2026 Deitzel EdwardSell$520.1K
Apr 17, 2026 Gallagher Thomas P.Sell$9.73M
Apr 17, 2026 Comly Barbara J.Sell$1.29M
Apr 9, 2026 Brown ShellySell$691.5K
Apr 9, 2026 Deitzel EdwardSell$486.2K
Apr 8, 2026 Brown ShellySell$135.2K
Apr 3, 2026 Teekell Judson GraySell$108.0K
Mar 26, 2026 Teekell Judson GraySell$12.0K
Mar 24, 2026 Brown ShellySell$1.02M
Mar 20, 2026 Eckert Kurt M.Sell$1.48M
Mar 18, 2026 Schafer Douglas M. JRSell$1.91M
Mar 6, 2026 STAHL MURRAYBuy$310.2K
Mar 6, 2026 STAHL MURRAYSell$2.19M
Feb 18, 2026 Brown ShellySell$813.8K
Feb 18, 2026 Deitzel EdwardSell$246.8K
Feb 18, 2026 Schafer Douglas M. JRSell$1.33M
Dec 15, 2025 STAHL MURRAYBuy$100.0K
Oct 6, 2025 STAHL MURRAYBuy$83.94
Sep 30, 2025 STAHL MURRAYBuy$1.24M
Aug 18, 2025 Emmons LanceBuy$125.76
Aug 15, 2025 Deitzel EdwardBuy$2.3K
Aug 15, 2025 Gallagher Thomas P.Buy$276.0K
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MIAX Insider Buying Activity

The following table shows recent insider purchases of Miami International Holdings, Inc. (MIAX) stock reported via SEC Form 4 filings.

DateInsiderTypeValue
Mar 6, 2026 STAHL MURRAYBuy$310.2K
Dec 15, 2025 STAHL MURRAYBuy$100.0K
Oct 6, 2025 STAHL MURRAYBuy$83.94
Sep 30, 2025 STAHL MURRAYBuy$1.24M
Aug 18, 2025 Emmons LanceBuy$125.76
Aug 15, 2025 Deitzel EdwardBuy$2.3K
Aug 15, 2025 Gallagher Thomas P.Buy$276.0K

MIAX Insider Selling Activity

The following table shows recent insider sales of Miami International Holdings, Inc. (MIAX) stock reported via SEC Form 4 filings.

DateInsiderTypeValue
Jul 14, 2026 Gallagher Thomas P.Sell$2.98M
Jul 14, 2026 Comly Barbara J.Sell$1.18M
Jul 7, 2026 Comly Barbara J.Sell$1.15M
Jul 7, 2026 Schafer Douglas M. JRSell$1.98M
Jul 7, 2026 Brown ShellySell$674.1K
Jul 7, 2026 Gallagher Thomas P.Sell$2.95M
Jul 7, 2026 Deitzel EdwardSell$462.4K
Jul 7, 2026 Jayabalan HarishSell$842.4K
Jul 7, 2026 Eckert Kurt M.Sell$206.6K
Jul 7, 2026 Teekell Judson GraySell$120.0K
Jun 17, 2026 Brown ShellySell$208.5K
Jun 12, 2026 Schwarzkopf CynthiaSell$813.7K
Jun 10, 2026 Jayabalan HarishSell$801.6K
Jun 4, 2026 Eckert Kurt M.Sell$224.5K
Jun 4, 2026 Deitzel EdwardSell$463.8K
Jun 4, 2026 Brown ShellySell$673.9K
Jun 4, 2026 Comly Barbara J.Sell$1.20M
Jun 4, 2026 Gallagher Thomas P.Sell$2.97M
Jun 4, 2026 Teekell Judson GraySell$128.3K
Jun 4, 2026 Schafer Douglas M. JRSell$2.06M
May 18, 2026 Emmons LanceSell$1.97M
May 7, 2026 Gallagher Thomas P.Sell$755.7K
May 5, 2026 Brown ShellySell$756.5K
May 5, 2026 Teekell Judson GraySell$141.9K
May 5, 2026 Comly Barbara J.Sell$1.32M
May 5, 2026 Schafer Douglas M. JRSell$2.27M
May 5, 2026 Eckert Kurt M.Sell$266.0K
May 5, 2026 Gallagher Thomas P.Sell$2.56M
May 5, 2026 Deitzel EdwardSell$520.1K
Apr 17, 2026 Gallagher Thomas P.Sell$9.73M
Apr 17, 2026 Comly Barbara J.Sell$1.29M
Apr 9, 2026 Brown ShellySell$691.5K
Apr 9, 2026 Deitzel EdwardSell$486.2K
Apr 8, 2026 Brown ShellySell$135.2K
Apr 3, 2026 Teekell Judson GraySell$108.0K
Mar 26, 2026 Teekell Judson GraySell$12.0K
Mar 24, 2026 Brown ShellySell$1.02M
Mar 20, 2026 Eckert Kurt M.Sell$1.48M
Mar 18, 2026 Schafer Douglas M. JRSell$1.91M
Mar 6, 2026 STAHL MURRAYSell$2.19M
Feb 18, 2026 Brown ShellySell$813.8K
Feb 18, 2026 Deitzel EdwardSell$246.8K
Feb 18, 2026 Schafer Douglas M. JRSell$1.33M

MIAX Insiders

Comly Barbara J.

officer: EVP, GC & Corporate Secretary

Sold $6.15M
5 tradesLast: Jul 14, 2026
Gallagher Thomas P.

director, officer: Chairman & CEO

Bought $276.0KSold $21.94M
7 tradesLast: Jul 14, 2026
Teekell Judson Gray

director

Sold $510.2K
5 tradesLast: Jul 7, 2026
Deitzel Edward

officer: EVP, CRO, CCO MIAX Exchanges

Bought $2.3KSold $2.18M
6 tradesLast: Jul 7, 2026
Schafer Douglas M. JR

officer: EVP and CIO

Sold $9.54M
5 tradesLast: Jul 7, 2026
Jayabalan Harish

officer: EVP, CISO and CRO

Bought $57.5KSold $1.64M
3 tradesLast: Jul 7, 2026
Eckert Kurt M.

director

Sold $2.18M
4 tradesLast: Jul 7, 2026
Brown Shelly

officer: EVP, Chief Strategy Officer

Sold $4.97M
8 tradesLast: Jul 7, 2026
Schwarzkopf Cynthia

director

Sold $813.7K
1 tradesLast: Jun 12, 2026
Emmons Lance

officer: EVP and CFO

Bought $125.76Sold $1.97M
2 tradesLast: May 18, 2026
STAHL MURRAY

Director

Bought $1.65MSold $2.19M
5 tradesLast: Mar 6, 2026
Massad Mark I.

Director

Bought $126.5K
1 tradesLast: Aug 15, 2025
Nazarali Jamil

Director

Bought $57.5K
1 tradesLast: Aug 15, 2025
Smollen John

EVP Traded Products & Relation

Bought $115.0K
1 tradesLast: Aug 15, 2025
Stahlin Paul

Director

Bought $23.0K
1 tradesLast: Aug 15, 2025
Moore Lisa

Director

Bought $126.5K
1 tradesLast: Aug 15, 2025