Miami International Holdings, Inc.
MIAX- Exchange
- NYSE
- Industry
- Security Brokers, Dealers & Flotation Companies
- SEC CIK
- 0001438472
In the last 90 days, Miami International Holdings, Inc. insiders filed 0 open-market purchases and 27 sales; 206 institutions reported holding it in 13F filings for Q2 2026, worth $2.68B in total; no superinvestor holds it.
Open-market trades, last 90 days
Open-market purchases (P) and sales (S) by Miami International Holdings, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.
- Open-market buys
- 0 filings
- Open-market sells
- 27 filings
- 10 insiders, $36.0M in total
- Insiders trading
- 10
- Net value
- −$36.0M
- Purchases minus sales
Insider roster
Directors, officers and 10% owners who have filed a Form 4 for Miami International Holdings, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Brown Shelly | EVP, Chief Strategy Officer | 316,490 | Sep 17, 2026 | 14 |
| Gallagher Thomas P. | Chairman & CEO | 786,542 | Sep 4, 2026 | 14 |
| Comly Barbara J. | EVP, GC & Corporate Secretary | 839,564 | Sep 4, 2026 | 11 |
| Deitzel Edward | EVP, CRO, CCO MIAX Exchanges | 119,601 | Sep 4, 2026 | 10 |
| Schafer Douglas M. JR | EVP and CIO | 387,414 | Sep 4, 2026 | 10 |
| Teekell Judson Gray | Director | 69,251 | Sep 4, 2026 | 9 |
| Schwarzkopf Cynthia | Director | 88,545 | Aug 19, 2026 | 4 |
| Emmons Lance | EVP and CFO | 86,538 | Aug 19, 2026 | 5 |
| Eckert Kurt M. | Director | 149,612 | Aug 6, 2026 | 6 |
| Jayabalan Harish | EVP, CISO and CRO | 78,065 | Aug 6, 2026 | 4 |
| Brown David A | Director | 7,066 | Jul 9, 2026 | 2 |
| Vermaas Cees | CEO of TISEG | 4,660 | Jun 18, 2026 | 1 |
| Smollen John | EVP, New Product Development | 178,212 | Jun 18, 2026 | 2 |
| Sommers Jill E. | Director | 6,083 | Jun 17, 2026 | 1 |
| Stahlin Paul | Director | 42,143 | Jun 17, 2026 | 2 |
| Sites Eric | Director | 5,684 | Jun 17, 2026 | 1 |
| Raymond Mark F. | Director | 67,064 | Jun 17, 2026 | 1 |
| Beckelman John | Director | 15,904 | Jun 17, 2026 | 2 |
| Al-Bahar Talal Jassim | Director | 40,891 | Jun 17, 2026 | 1 |
| Massad Mark I. | Director | 10,737 | Jun 17, 2026 | 1 |
| Lozier Kenneth W. | Director | 8,237 | Jun 17, 2026 | 1 |
| Becker Lee | Director | 2,267 | Jun 17, 2026 | 1 |
| Moore Lisa | Director | 12,737 | Jun 17, 2026 | 1 |
| Horizon Kinetics Asset Management LLC | 10% Owner | 2,170,898Indirect | May 21, 2026 | 8 |
| Stahl Murray | Director | 4,633,842Indirect | Mar 6, 2026 | 7 |
| Nazarali Jamil | Director | 2,500 | Aug 15, 2025 | 0 |
Insider trades
Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Apr 9, 2026 (view filing) | Apr 7-8 | 2 days | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | SSale | −12.3K | $42.01 | −$518.2K | −9.6%116.2K after | 3 lots10b5-1 |
| Apr 9, 2026 (view filing) | Apr 8 | 1 day | Brown ShellyEVP, Chief Strategy Officer | SSale | −16.4K | $42.08 | −$691.5K | −4.8%325.0K after | 10b5-1 |
| Apr 9, 2026 (view filing) | Apr 6-7 | 3 days | Brown ShellyEVP, Chief Strategy Officer | SSale | −3.26K | $41.52 | −$135.2K | −1.0%325.0K after | Amended2 lots10b5-1 |
| Apr 3, 2026 (view filing) | Apr 2 | 1 day | Teekell Judson GrayDirector | SSale | −2.70K | $40.00 | −$108.0K | −4.4%59.3K after | 10b5-1 |
| Mar 26, 2026 (view filing) | Mar 25 | 1 day | Teekell Judson GrayDirector | SSale | −300 | $40.00 | −$12.0K | −0.5%62.0K after | |
| Mar 24, 2026 (view filing) | Mar 23 | 1 day | Brown ShellyEVP, Chief Strategy Officer | SSale | −25.9K | $39.33 | −$1.02M | −8.0%299.2K after | 10b5-1 |
| Mar 20, 2026 (view filing) | Mar 19 | 1 day | Eckert Kurt M.Director | SSale | −37.9K | $39.00 | −$1.48M | −21.0%142.4K after | 10b5-1 |
| Mar 18, 2026 (view filing) | Mar 17 | 1 day | Schafer Douglas M. JREVP and CIO | SSale | −48.0K | $39.74 | −$1.91M | −10.8%396.7K after | 10b5-1 |
| Mar 6, 2026 (view filing)5:57 PM ET | Mar 5 | 1 day | Stahl Murray and 1 otherDirector | PPurchase | +7.20K | $43.08 | +$310.2K | +0.2%4.63M after | |
| Mar 6, 2026 (view filing)5:52 PM ET | Mar 4 | 2 days | Stahl Murray and 1 otherDirector | PPurchase | +7.20K | $43.38 | +$312.3K | +0.2%4.63M after | Amended |
| Mar 6, 2026 (view filing)4:12 PM ET | Mar 2 | 4 days | Stahl Murray and 1 otherDirector | SSale | −53.6K | $40.92 | −$2.19M | −1.1%4.62M after | Amended |
| Dec 15, 2025 (view filing)3:53 PM ET | Dec 12 | 3 days | Stahl Murray and 1 otherDirector | PPurchase | +2.44K | $41.00 | +$100.0K | +0.1%4.56M after | |
| Oct 6, 2025 (view filing)4:20 PM ET | Oct 3 | 3 days | Stahl Murray and 1 otherDirector | PPurchase | +2 | $41.97 | +$83.94 | 0.0%4.56M after | |
| Sep 30, 2025 (view filing)3:17 PM ET | Sep 26 | 4 days | Stahl Murray and 1 otherDirector | PPurchase | +4 | $41.76 | +$167.04 | 0.0%4.56M after | |
| Sep 30, 2025 (view filing)2:28 PM ET | Aug 28 | 33 daysLate | Stahl Murray and 1 otherDirector | PPurchase | +34.5K | $36.10 | +$1.24M | +0.8%4.56M after | |
| Aug 18, 2025 (view filing) | Aug 14 | 4 days | Emmons LanceEVP and CFO | PPurchase | +4 | $31.44 | +$125.76 | New position4 after | |
| Aug 15, 2025 (view filing) | Aug 13 | 2 days | Moore LisaDirector | PPurchase | +5.50K | $23.00 | +$126.5K | New position5.50K after | |
| Aug 15, 2025 (view filing) | Aug 13 | 2 days | Jayabalan HarishEVP, CISO and CRO | PPurchase | +2.50K | $23.00 | +$57.5K | +63.4%6.44K after | |
| Aug 15, 2025 (view filing) | Aug 13 | 2 days | Stahlin PaulDirector | PPurchase | +1.00K | $23.00 | +$23.0K | New position1.00K after | |
| Aug 15, 2025 (view filing) | Aug 13 | 2 days | Nazarali JamilDirector | PPurchase | +2.50K | $23.00 | +$57.5K | New position2.50K after | |
| Aug 15, 2025 (view filing) | Aug 13 | 2 days | Smollen JohnEVP Traded Products & Relation | PPurchase | +5.00K | $23.00 | +$115.0K | +224.6%7.23K after | |
| Aug 15, 2025 (view filing) | Aug 13 | 2 days | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | PPurchase | +100 | $23.00 | +$2.30K | +0.3%32.2K after | |
| Aug 15, 2025 (view filing) | Aug 13 | 2 days | Gallagher Thomas P.Chairman & CEO | PPurchase | +12.0K | $23.00 | +$276.0K | New position12.0K after | |
| Aug 15, 2025 (view filing) | Aug 13 | 2 days | Lozier Kenneth W.Director | PPurchase | +1.00K | $23.00 | +$23.0K | New position1.00K after | |
| Aug 15, 2025 (view filing) | Aug 13 | 2 days | Massad Mark I.Director | PPurchase | +3.50K | $23.00 | +$80.5K | New position3.50K after | |
| Aug 15, 2025 (view filing) | Aug 13 | 2 days | Massad Mark I.Director | PPurchase | +4.50K | $23.00 | +$103.5K | New position500 after | 3 lots |