Over the past 12 months, 18 insiders at MIAMI INTERNATIONAL HOLDINGS, INC. filed 61 open-market SEC Form 4 transactions on MIAX: 20 purchases worth $3.1M and 41 sales worth $50.6M. Insiders have been net sellers over this period. The most recent filing was on Jul 15, 26.
| Date | Insider | Type | Shares | Price | Value |
|---|---|---|---|---|---|
| Jul 15, 26 | Cynthia SchwarzkopfDirector | SELL | 5.0K | $42.00 | $210K |
| Jul 13, 26 | Barbara J. ComlyEVP, GC & Corporate Secretary | SELL | 28.0K | $41.98 | $1.2M |
| Jul 13, 26 | Thomas P. GallagherChairman & CEO | SELL | 70.0K | $42.52 | $3.0M |
| Jul 7, 26 | Thomas P. GallagherChairman & CEO | SELL | 28.2K | $42.27 | $1.2M |
| Jul 6, 26 | Shelly BrownEVP, Chief Strategy Officer | SELL | 16.0K | $42.13 | $674K |
| Jul 6, 26 | Edward DeitzelEVP, CRO, CCO MIAX Exchanges | SELL | 11.0K | $42.04 | $462K |
| Jul 6, 26 | Thomas P. GallagherChairman & CEO | SELL | 41.8K | $42.09 | $1.8M |
| Jul 6, 26 | Harish JayabalanEVP, CISO and CRO | SELL | 20.0K | $42.12 | $842K |
| Jul 2, 26 | Barbara J. ComlyEVP, GC & Corporate Secretary | SELL | 28.0K | $41.22 | $1.2M |
| Jul 2, 26 | Kurt M. Eckert | SELL | 5.3K | $39.35 | $207K |
| Jul 2, 26 | Douglas M. Schafer JrEVP and CIO | SELL | 48.0K | $41.22 | $2.0M |
| Jul 2, 26 | Judson Gray Teekell | SELL | 3.0K | $40.00 | $120K |
| Jun 15, 26 | Shelly BrownEVP, Chief Strategy Officer | SELL | 4.7K | $44.23 | $209K |
| Jun 2, 26 | Shelly BrownEVP, Chief Strategy Officer | SELL | 16.0K | $42.12 | $674K |
| Jun 2, 26 | Barbara J. ComlyEVP, GC & Corporate Secretary | SELL | 28.0K | $42.85 | $1.2M |
| Jun 2, 26 | Edward DeitzelEVP, CRO, CCO MIAX Exchanges | SELL | 11.0K | $42.16 | $464K |
| Jun 2, 26 | Kurt M. Eckert | SELL | 5.3K | $42.76 | $224K |
| Jun 2, 26 | Thomas P. GallagherChairman & CEO | SELL | 70.0K | $42.36 | $3.0M |
| May 15, 26 | Lance EmmonsEVP and CFO | SELL | 35.0K | $56.36 | $2.0M |
| May 5, 26 | Thomas P. GallagherChairman & CEO | SELL | 15.8K | $47.92 | $756K |
| May 4, 26 | Shelly BrownEVP, Chief Strategy Officer | SELL | 16.0K | $47.28 | $756K |
| May 4, 26 | Barbara J. ComlyEVP, GC & Corporate Secretary | SELL | 28.0K | $47.26 | $1.3M |
| May 4, 26 | Edward DeitzelEVP, CRO, CCO MIAX Exchanges | SELL | 11.0K | $47.28 | $520K |
| May 4, 26 | Kurt M. Eckert | SELL | 5.6K | $47.29 | $266K |
| May 4, 26 | Thomas P. GallagherChairman & CEO | SELL | 54.2K | $47.26 | $2.6M |
| Apr 15, 26 | Barbara J. ComlyEVP, GC & Corporate Secretary | SELL | 29.7K | $43.64 | $1.3M |
| Apr 15, 26 | Thomas P. GallagherChairman & CEO | SELL | 104.1K | $43.68 | $4.5M |
| Apr 8, 26 | Shelly BrownEVP, Chief Strategy Officer | SELL | 16.4K | $42.08 | $692K |
| Apr 8, 26 | Edward DeitzelEVP, CRO, CCO MIAX Exchanges | SELL | 7.6K | $42.02 | $318K |
| Apr 7, 26 | Edward DeitzelEVP, CRO, CCO MIAX Exchanges | SELL | 4.0K | $42.00 | $168K |
| Apr 7, 26 | Shelly BrownEVP, Chief Strategy Officer | SELL | 900 | $42.00 | $38K |
| Apr 6, 26 | Shelly BrownEVP, Chief Strategy Officer | SELL | 2.4K | $41.33 | $97K |
| Mar 25, 26 | Judson Gray TeekellDirector | SELL | 300 | $40.00 | $12K |
| Mar 23, 26 | Shelly BrownEVP, Chief Strategy Officer | SELL | 25.9K | $39.33 | $1.0M |
| Mar 19, 26 | Kurt M. EckertDirector | SELL | 37.9K | $39.00 | $1.5M |
| Mar 17, 26 | Douglas M. Schafer JrEVP and CIO | SELL | 48.0K | $39.74 | $1.9M |
| Mar 5, 26 | Murray StahlDirector,TenPercentOwner | BUY | 7.2K | $43.08 | $310K |
| Mar 4, 26 | Horizon Kinetics Asset Management LlcDirector,TenPercentOwner | BUY | 7.2K | $43.38 | $312K |
| Mar 4, 26 | Murray StahlDirector,TenPercentOwner | BUY | 7.2K | $43.38 | $312K |
| Mar 2, 26 | Horizon Kinetics Asset Management LlcDirector,TenPercentOwner | SELL | 121.1K | $40.92 | $5.0M |
| Mar 2, 26 | Murray StahlDirector,TenPercentOwner | SELL | 53.6K | $40.92 | $2.2M |
| Dec 12, 25 | Murray StahlDirector,TenPercentOwner | BUY | 2.4K | $41.00 | $100K |
| Oct 3, 25 | Horizon Kinetics Asset Management LlcDirector,TenPercentOwner | BUY | 2 | $41.97 | $84 |
| Sep 26, 25 | Murray StahlDirector,TenPercentOwner | BUY | 4 | $41.76 | $167 |
| Aug 28, 25 | Horizon Kinetics Asset Management LlcDirector,TenPercentOwner | BUY | 34.5K | $36.10 | $1.2M |
| Aug 14, 25 | Lance EmmonsEVP and CFO | BUY | 4 | $31.44 | $126 |
| Aug 13, 25 | Edward DeitzelEVP, CRO, CCO MIAX Exchanges | BUY | 100 | $23.00 | $2K |
| Aug 13, 25 | Thomas P. GallagherChairman & CEO | BUY | 12.0K | $23.00 | $276K |
| Aug 13, 25 | Harish JayabalanEVP, CISO and CRO | BUY | 2.5K | $23.00 | $58K |
| Aug 13, 25 | Kenneth W. LozierDirector | BUY | 1.0K | $23.00 | $23K |
Over the past 12 months, insiders at MIAMI INTERNATIONAL HOLDINGS, INC. filed 20 open-market purchases worth $3.1M and 41 sales worth $50.6M on MIAX, which makes them net sellers over the period. The most recent Form 4 was filed on Jul 15, 26.
The largest recent open-market MIAX insider purchase in our data was $1.2M by Horizon Kinetics Asset Management Llc, Director,TenPercentOwner, filed on Aug 28, 25.
18 different insiders at MIAMI INTERNATIONAL HOLDINGS, INC. filed open-market SEC Form 4 transactions on MIAX over the last 12 months.
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