MIAMI INTERNATIONAL HOLDINGS, INC.
MIAX
110 insider filings · Latest: Oct 2, 2026
Common Stock Transactions
| Txn Date | Accepted | Insider | Type | Shares | Avg Price | Value | Shares Owned | Filing |
|---|---|---|---|---|---|---|---|---|
| Oct 2, 2026 | Oct 6 9:28 PM | Douglas M. Schafer JREVP and CIO | Sale | 40,000 | $33.34 | $1.3M | 387,414(D) | View → |
| Oct 2, 2026 | Oct 2 8:19 PM | DOUGLAS M. SCHAFER JR. | Proposed Sale | 120,000 | $33.75 | $4.0M | — | View → |
| Sep 16, 2026 | Sep 17 8:43 PM | Shelly BrownEVP, Chief Strategy Officer | Sale | 21,217 | $38.61 | $819.2K | 316,490(D) | View → |
| Sep 16, 2026 | Sep 16 8:29 PM | SHELLY BROWN | Proposed Sale | 21,217 | $39.51 | $838.3K | — | View → |
| Sep 3, 2026 | Sep 4 8:35 PM | Thomas P. GallagherDirector, Chairman & CEO | Sale | 47,000 | $42.43 | $2.0M | 1,423,275(I) | View → |
| Sep 2, 2026 | Sep 4 8:31 PM | Barbara J. ComlyEVP, GC & Corporate Secretary | Sale | 44,445 | $40.49 | $1.8M | 839,564(D) | View → |
| Sep 3, 2026 | Sep 4 8:28 PM | Edward DeitzelEVP, CRO, CCO MIAX Exchanges | Sale | 11,000 | $42.21 | $464.3K | 119,601(D) | View → |
| Sep 2, 2026 | Sep 4 8:25 PM | Douglas M. Schafer JREVP and CIO | Sale | 48,000 | $40.48 | $1.9M | 387,414(D) | View → |
| Sep 2, 2026 | Sep 4 8:21 PM | Judson Gray TeekellDirector | Sale | 8,545 | $41.34 | $353.2K | 69,251(I) | View → |
| Sep 3, 2026 | Sep 3 8:41 PM | GALLAGHER INVESTMENTS LLC | Proposed Sale | 141,000 | $40.62 | $5.7M | — | View → |
| Aug 19, 2026 | Aug 20 8:12 PM | Thomas P. GallagherDirector, Chairman & CEO | Sale | 149,700 | $41.13 | $6.2M | 1,423,275(I) | View → |
| Aug 19, 2026 | Aug 19 8:39 PM | GALLAGHER INVESTMENTS LLC | Proposed Sale | 149,700 | $41.91 | $6.3M | — | View → |
| Aug 17, 2026 | Aug 19 8:12 PM | Cynthia SchwarzkopfDirector | Sale | 5,000 | $42.85 | $214.3K | 88,545(D) | View → |
| Aug 17, 2026 | Aug 19 8:10 PM | Lance EmmonsEVP and CFO | Sale | 35,000 | $42.83 | $1.5M | 86,538(D) | View → |
| Aug 17, 2026 | Aug 17 9:56 PM | Lance Emmons | Proposed Sale | 35,000 | $43.52 | $1.5M | — | View → |
| Aug 4, 2026 | Aug 6 8:11 PM | Kurt M. EckertDirector | Sale | 1,063 | $45.80 | $48.7K | 149,612(D) | View → |
| Aug 4, 2026 | Aug 6 8:10 PM | Judson Gray TeekellDirector | Sale | 3,000 | $45.79 | $137.4K | 72,251(D) | View → |
| Aug 4, 2026 | Aug 6 8:10 PM | Harish JayabalanEVP, CISO and CRO | Sale | 20,000 | $45.90 | $918.0K | 78,065(D) | View → |
| Aug 4, 2026 | Aug 6 8:09 PM | Barbara J. ComlyEVP, GC & Corporate Secretary | Sale | 44,445 | $45.69 | $2.0M | 882,984(D) | View → |
| Aug 4, 2026 | Aug 6 8:08 PM | Edward DeitzelEVP, CRO, CCO MIAX Exchanges | Sale | 11,000 | $45.78 | $503.6K | 119,601(D) | View → |
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Stock Options & Derivatives
| Txn Date | Accepted | Insider | Type | Shares | Exercise Price | Shares Owned | Filing |
|---|---|---|---|---|---|---|---|
| Jun 11, 2026 | Jun 11 8:42 PM | Paul StahlinDirector | Option Exercise | 4,000 | $12.00 | 0(D) | View → |
| Jun 9, 2026 | Jun 11 8:42 PM | Paul StahlinDirector | Option Exercise | 7,000 | $12.00 | 4,000(D) | View → |
| Jun 9, 2026 | Jun 10 8:29 PM | Harish JayabalanEVP, CISO and CRO | Option Exercise | 9,783 | $12.00 | 834(D) | View → |
| Jun 8, 2026 | Jun 10 8:29 PM | Harish JayabalanEVP, CISO and CRO | Option Exercise | 10,217 | $12.00 | 10,617(D) | View → |
| Jun 2, 2026 | Jun 4 8:52 PM | Kurt M. EckertDirector | Option Exercise | 5,250 | $12.00 | 6,313(D) | View → |
| Jun 2, 2026 | Jun 4 8:46 PM | Barbara J. ComlyEVP, GC & Corporate Secretary | Option Exercise | 28,000 | $12.00 | 56,000(D) | View → |
| Jun 2, 2026 | Jun 4 8:44 PM | Edward DeitzelEVP, CRO, CCO MIAX Exchanges | Option Exercise | 11,000 | $12.00 | 7,333(D) | View → |
| Jun 2, 2026 | Jun 4 8:40 PM | Douglas M. Schafer JREVP and CIO | Option Exercise | 48,000 | $12.00 | 6,000(D) | View → |
| Jun 2, 2026 | Jun 4 8:37 PM | Shelly BrownEVP, Chief Strategy Officer | Option Exercise | 16,000 | $12.00 | 16,000(D) | View → |
| Jun 2, 2026 | Jun 4 8:37 PM | Thomas P. GallagherDirector, Chairman & CEO | Option Exercise | 70,000 | $12.00 | 140,000(I) | View → |
| May 19, 2026 | May 19 8:34 PM | Judson Gray TeekellDirector | Option Exercise | 22,667 | $12.00 | 0(D) | View → |
| May 11, 2026 | May 13 8:26 PM | Thomas P. GallagherDirector, Chairman & CEO | Option Exercise | 24,999 | $12.00 | 0(D) | View → |
| May 5, 2026 | May 7 8:07 PM | Thomas P. GallagherDirector, Chairman & CEO | Option Exercise | 15,771 | $12.00 | 210,000(I) | View → |
| May 4, 2026 | May 5 12:17 PM | Thomas P. GallagherDirector, Chairman & CEO | Option Exercise | 54,229 | $12.00 | 225,771(I) | View → |
| May 4, 2026 | May 5 12:16 PM | Edward DeitzelEVP, CRO, CCO MIAX Exchanges | Option Exercise | 11,000 | $12.00 | 18,333(D) | View → |
| May 4, 2026 | May 5 11:43 AM | Shelly BrownEVP, Chief Strategy Officer | Option Exercise | 16,000 | $12.00 | 32,000(D) | View → |
| May 4, 2026 | May 5 11:32 AM | Douglas M. Schafer JREVP and CIO | Option Exercise | 48,000 | $12.00 | 54,000(D) | View → |
| May 4, 2026 | May 5 11:31 AM | Kurt M. EckertDirector | Option Exercise | 5,625 | $12.00 | 11,563(D) | View → |
| May 4, 2026 | May 5 11:30 AM | Barbara J. ComlyEVP, GC & Corporate Secretary | Option Exercise | 28,000 | $12.00 | 84,000(D) | View → |
| Apr 15, 2026 | Apr 17 8:17 PM | Thomas P. GallagherDirector, Chairman & CEO | Option Exercise | 70,001 | $12.00 | 280,000(I) | View → |