In the last 12 months, insiders at Miami International Holdings made open-market purchases of $722,511 (16.84K shares) and open-market sales of $85.01 million (2.01Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Murray Stahl | Director | 0 | 4,633,842 | 4,633,842 | 39.8% | 06 Mar, 2026 |
| 2 | Thomas P. Gallagher | Chairman Ceo | 786,542 | 1,423,275 | 2,209,817 | 19.0% | 04 Sep, 2026 |
| 3 | Kinetics Asset Management Llc Horizon | TenPercentOwner | 0 | 2,170,898 | 2,170,898 | 18.6% | 21 May, 2026 |
| 4 | Barbara J. Comly | Evp, Gc Corporate Secretary | 839,564 | 0 | 839,564 | 7.2% | 04 Nov, 2026 |
| 5 | Douglas M. Jr Schafer | Evp And Cio | 387,414 | 0 | 387,414 | 3.3% | 05 Nov, 2026 |
| 6 | Shelly Brown | Evp, Chief Strategy Officer | 316,490 | 0 | 316,490 | 2.7% | 17 Sep, 2026 |
| 7 | John Smollen | Evp, New Product Development | 178,212 | 0 | 178,212 | 1.5% | 18 Jun, 2026 |
| 8 | Judson Gray Teekell | Director | 69,251 | 81,000 | 150,251 | 1.3% | 04 Sep, 2026 |
| 9 | Kurt M. Eckert | Director | 149,612 | 0 | 149,612 | 1.3% | 06 Aug, 2026 |
| 10 | Edward Deitzel | Evp, Cro, Cco Miax Exchanges | 119,601 | 0 | 119,601 | 1.0% | 04 Sep, 2026 |
| 11 | Cynthia Schwarzkopf | Director | 88,545 | 0 | 88,545 | 0.8% | 19 Aug, 2026 |
| 12 | Lance Emmons | Evp And Cfo | 86,538 | 0 | 86,538 | 0.7% | 19 Aug, 2026 |
| 13 | Harish Jayabalan | Evp, Ciso And Cro | 86,398 | 0 | 86,398 | 0.7% | 29 Sep, 2026 |
| 14 | Mark F. Raymond | Director | 67,064 | 0 | 67,064 | 0.6% | 17 Jun, 2026 |
| 15 | Paul Stahlin | Director | 42,143 | 0 | 42,143 | 0.4% | 17 Jun, 2026 |
| 16 | Talal Jassim Al-Bahar | Director | 40,891 | 0 | 40,891 | 0.4% | 17 Jun, 2026 |
| 17 | John Beckelman | Director | 15,904 | 0 | 15,904 | 0.1% | 17 Jun, 2026 |
| 18 | Lisa Moore | Director | 12,737 | 0 | 12,737 | 0.1% | 17 Jun, 2026 |
| 19 | Mark I. Massad | Director | 10,737 | 0 | 10,737 | 0.1% | 17 Jun, 2026 |
| 20 | Kenneth W. Lozier | Director | 8,237 | 0 | 8,237 | 0.1% | 17 Jun, 2026 |
| 21 | David A Brown | Director | 7,066 | 0 | 7,066 | 0.1% | 09 Jul, 2026 |
| 22 | Jill E. Sommers | Director | 6,083 | 0 | 6,083 | 0.1% | 17 Jun, 2026 |
| 23 | Eric Sites | Director | 5,684 | 0 | 5,684 | 0.0% | 17 Jun, 2026 |
| 24 | Cees Vermaas | Ceo Of Tiseg | 4,660 | 0 | 4,660 | 0.0% | 18 Jun, 2026 |
| 25 | Jamil Nazarali | Director | 2,500 | 0 | 2,500 | 0.0% | 15 Aug, 2025 |
| 26 | Lee Becker | Director | 2,267 | 0 | 2,267 | 0.0% | 17 Jun, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 03 Nov, 2026 | Douglas M. Jr Schafer | Evp And Cio | Acquired M | 40,000 | $12.00 | $480.00K | 427,414 | Direct |
| 03 Nov, 2026 | Douglas M. Jr Schafer | Evp And Cio | Disposed S | 40,000 | $34.07 | $1.36Mn | 387,414 | Direct |
| 04 Nov, 2026 | Douglas M. Jr Schafer | Evp And Cio | Acquired M | 8,000 | $12.00 | $96.00K | 395,414 | Direct |
| 04 Nov, 2026 | Douglas M. Jr Schafer | Evp And Cio | Disposed S | 8,000 | $35.00 | $280.00K | 387,414 | Direct |
| 03 Nov, 2026 | Douglas M. Jr Schafer | Evp And Cio | Disposed M | 40,000 | $0.00 | $0 | 107,334 | Direct |
| 04 Nov, 2026 | Douglas M. Jr Schafer | Evp And Cio | Disposed M | 8,000 | $0.00 | $0 | 99,334 | Direct |
| 02 Nov, 2026 | Barbara J. Comly | Evp, Gc Corporate Secretary | Acquired M | 23,339 | $12.00 | $280.07K | 862,903 | Direct |
| 02 Nov, 2026 | Barbara J. Comly | Evp, Gc Corporate Secretary | Disposed S | 23,339 | $35.10 | $819.20K | 839,564 | Direct |
| 04 Nov, 2026 | Barbara J. Comly | Evp, Gc Corporate Secretary | Acquired M | 8,799 | $12.00 | $105.59K | 848,363 | Direct |
| 04 Nov, 2026 | Barbara J. Comly | Evp, Gc Corporate Secretary | Acquired M | 47,223 | $12.00 | $566.68K | 895,586 | Direct |
| 04 Nov, 2026 | Barbara J. Comly | Evp, Gc Corporate Secretary | Disposed S | 56,022 | $35.07 | $1.96Mn | 839,564 | Direct |
| 02 Nov, 2026 | Barbara J. Comly | Evp, Gc Corporate Secretary | Disposed M | 23,339 | $0.00 | $0 | 8,799 | Direct |
| 04 Nov, 2026 | Barbara J. Comly | Evp, Gc Corporate Secretary | Disposed M | 8,799 | $0.00 | $0 | 0 | Direct |
| 04 Nov, 2026 | Barbara J. Comly | Evp, Gc Corporate Secretary | Disposed M | 47,223 | $0.00 | $0 | 94,444 | Direct |
| 22 Oct, 2026 | Douglas M. Jr Schafer | Evp And Cio | Acquired M | 8,000 | $12.00 | $96.00K | 395,414 | Direct |
| 22 Oct, 2026 | Barbara J. Comly | Evp, Gc Corporate Secretary | Acquired M | 12,306 | $12.00 | $147.67K | 851,870 | Direct |
| 22 Oct, 2026 | Douglas M. Jr Schafer | Evp And Cio | Disposed S | 8,000 | $35.06 | $280.48K | 387,414 | Direct |
| 22 Oct, 2026 | Barbara J. Comly | Evp, Gc Corporate Secretary | Disposed S | 12,306 | $35.04 | $431.20K | 839,564 | Direct |
| 22 Oct, 2026 | Barbara J. Comly | Evp, Gc Corporate Secretary | Disposed M | 12,306 | $0.00 | $0 | 32,138 | Direct |
| 22 Oct, 2026 | Douglas M. Jr Schafer | Evp And Cio | Disposed M | 8,000 | $0.00 | $0 | 147,334 | Direct |